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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal 

Pull signal handling cleanups from Al Viro:
 "This is the first pile; another one will come a bit later and will
  contain SYSCALL_DEFINE-related patches.

   - a bunch of signal-related syscalls (both native and compat)
     unified.

   - a bunch of compat syscalls switched to COMPAT_SYSCALL_DEFINE
     (fixing several potential problems with missing argument
     validation, while we are at it)

   - a lot of now-pointless wrappers killed

   - a couple of architectures (cris and hexagon) forgot to save
     altstack settings into sigframe, even though they used the
     (uninitialized) values in sigreturn; fixed.

   - microblaze fixes for delivery of multiple signals arriving at once

   - saner set of helpers for signal delivery introduced, several
     architectures switched to using those."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: (143 commits)
  x86: convert to ksignal
  sparc: convert to ksignal
  arm: switch to struct ksignal * passing
  alpha: pass k_sigaction and siginfo_t using ksignal pointer
  burying unused conditionals
  make do_sigaltstack() static
  arm64: switch to generic old sigaction() (compat-only)
  arm64: switch to generic compat rt_sigaction()
  arm64: switch compat to generic old sigsuspend
  arm64: switch to generic compat rt_sigqueueinfo()
  arm64: switch to generic compat rt_sigpending()
  arm64: switch to generic compat rt_sigprocmask()
  arm64: switch to generic sigaltstack
  sparc: switch to generic old sigsuspend
  sparc: COMPAT_SYSCALL_DEFINE does all sign-extension as well as SYSCALL_DEFINE
  sparc: kill sign-extending wrappers for native syscalls
  kill sparc32_open()
  sparc: switch to use of generic old sigaction
  sparc: switch sys_compat_rt_sigaction() to COMPAT_SYSCALL_DEFINE
  mips: switch to generic sys_fork() and sys_clone()
  ...
This commit is contained in:
Linus Torvalds 2013-02-23 18:50:11 -08:00
parent 5ce1a70e2f 235b80226b
commit 9e2d59ad58
185 changed files with 1361 additions and 4823 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
arch/Kconfig
View File

@ -368,9 +368,6 @@ config MODULES_USE_ELF_REL
Modules only use ELF REL relocations. Modules with ELF RELA
relocations will give an error.
config GENERIC_SIGALTSTACK
bool
#
# ABI hall of shame
#
@ -385,4 +382,30 @@ config CLONE_BACKWARDS2
help
Architecture has the first two arguments of clone(2) swapped.
config ODD_RT_SIGACTION
bool
help
Architecture has unusual rt_sigaction(2) arguments
config OLD_SIGSUSPEND
bool
help
Architecture has old sigsuspend(2) syscall, of one-argument variety
config OLD_SIGSUSPEND3
bool
help
Even weirder antique ABI - three-argument sigsuspend(2)
config OLD_SIGACTION
bool
help
Architecture has old sigaction(2) syscall. Nope, not the same
as OLD_SIGSUSPEND | OLD_SIGSUSPEND3 - alpha has sigsuspend(2),
but fairly different variant of sigaction(2), thanks to OSF/1
compatibility...
config COMPAT_OLD_SIGACTION
bool
source "kernel/gcov/Kconfig"

3
arch/alpha/Kconfig
View File

@ -21,7 +21,8 @@ config ALPHA
select GENERIC_STRNLEN_USER
select HAVE_MOD_ARCH_SPECIFIC
select MODULES_USE_ELF_RELA
select GENERIC_SIGALTSTACK
select ODD_RT_SIGACTION
select OLD_SIGSUSPEND
help
The Alpha is a 64-bit general-purpose processor designed and
marketed by the Digital Equipment Corporation of blessed memory,

11
arch/alpha/include/asm/signal.h
View File

@ -22,15 +22,6 @@ struct osf_sigaction {
int sa_flags;
};
struct sigaction {
__sighandler_t sa_handler;
unsigned long sa_flags;
sigset_t sa_mask; /* mask last for extensibility */
};
struct k_sigaction {
struct sigaction sa;
__sigrestore_t ka_restorer;
};
#define __ARCH_HAS_KA_RESTORER
#include <asm/sigcontext.h>
#endif

1
arch/alpha/include/asm/unistd.h
View File

@ -14,7 +14,6 @@
#define __ARCH_WANT_SYS_OLD_GETRLIMIT
#define __ARCH_WANT_SYS_OLDUMOUNT
#define __ARCH_WANT_SYS_SIGPENDING
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_SYS_FORK
#define __ARCH_WANT_SYS_VFORK
#define __ARCH_WANT_SYS_CLONE

1
arch/alpha/kernel/process.c
View File

@ -250,7 +250,6 @@ copy_thread(unsigned long clone_flags, unsigned long usp,
struct pt_regs *childregs = task_pt_regs(p);
struct pt_regs *regs = current_pt_regs();
struct switch_stack *childstack, *stack;
unsigned long settls;
childstack = ((struct switch_stack *) childregs) - 1;
childti->pcb.ksp = (unsigned long) childstack;

121
arch/alpha/kernel/signal.c
View File

@ -112,16 +112,6 @@ SYSCALL_DEFINE5(rt_sigaction, int, sig, const struct sigaction __user *, act,
return ret;
}
/*
* Atomically swap in the new signal mask, and wait for a signal.
*/
SYSCALL_DEFINE1(sigsuspend, old_sigset_t, mask)
{
sigset_t blocked;
siginitset(&blocked, mask);
return sigsuspend(&blocked);
}
/*
* Do a signal return; undo the signal stack.
*/
@ -282,12 +272,9 @@ give_sigsegv:
*/
static inline void __user *
get_sigframe(struct k_sigaction *ka, unsigned long sp, size_t frame_size)
get_sigframe(struct ksignal *ksig, unsigned long sp, size_t frame_size)
{
if ((ka->sa.sa_flags & SA_ONSTACK) != 0 && ! sas_ss_flags(sp))
sp = current->sas_ss_sp + current->sas_ss_size;
return (void __user *)((sp - frame_size) & -32ul);
return (void __user *)((sigsp(sp, ksig) - frame_size) & -32ul);
}
static long
@ -348,14 +335,13 @@ setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
}
static int
setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
struct pt_regs *regs)
setup_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs)
{
unsigned long oldsp, r26, err = 0;
struct sigframe __user *frame;
oldsp = rdusp();
frame = get_sigframe(ka, oldsp, sizeof(*frame));
frame = get_sigframe(ksig, oldsp, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
return -EFAULT;
@ -365,9 +351,8 @@ setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
if (ka->ka_restorer) {
r26 = (unsigned long) ka->ka_restorer;
} else {
r26 = (unsigned long) ksig->ka.ka_restorer;
if (!r26) {
err |= __put_user(INSN_MOV_R30_R16, frame->retcode+0);
err |= __put_user(INSN_LDI_R0+__NR_sigreturn, frame->retcode+1);
err |= __put_user(INSN_CALLSYS, frame->retcode+2);
@ -381,8 +366,8 @@ setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
/* "Return" to the handler */
regs->r26 = r26;
regs->r27 = regs->pc = (unsigned long) ka->sa.sa_handler;
regs->r16 = sig; /* a0: signal number */
regs->r27 = regs->pc = (unsigned long) ksig->ka.sa.sa_handler;
regs->r16 = ksig->sig; /* a0: signal number */
regs->r17 = 0; /* a1: exception code */
regs->r18 = (unsigned long) &frame->sc; /* a2: sigcontext pointer */
wrusp((unsigned long) frame);
@ -395,18 +380,17 @@ setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
}
static int
setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
sigset_t *set, struct pt_regs *regs)
setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs)
{
unsigned long oldsp, r26, err = 0;
struct rt_sigframe __user *frame;
oldsp = rdusp();
frame = get_sigframe(ka, oldsp, sizeof(*frame));
frame = get_sigframe(ksig, oldsp, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
return -EFAULT;
err |= copy_siginfo_to_user(&frame->info, info);
err |= copy_siginfo_to_user(&frame->info, &ksig->info);
/* Create the ucontext. */
err |= __put_user(0, &frame->uc.uc_flags);
@ -421,9 +405,8 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
if (ka->ka_restorer) {
r26 = (unsigned long) ka->ka_restorer;
} else {
r26 = (unsigned long) ksig->ka.ka_restorer;
if (!r26) {
err |= __put_user(INSN_MOV_R30_R16, frame->retcode+0);
err |= __put_user(INSN_LDI_R0+__NR_rt_sigreturn,
frame->retcode+1);
@ -437,8 +420,8 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
/* "Return" to the handler */
regs->r26 = r26;
regs->r27 = regs->pc = (unsigned long) ka->sa.sa_handler;
regs->r16 = sig; /* a0: signal number */
regs->r27 = regs->pc = (unsigned long) ksig->ka.sa.sa_handler;
regs->r16 = ksig->sig; /* a0: signal number */
regs->r17 = (unsigned long) &frame->info; /* a1: siginfo pointer */
regs->r18 = (unsigned long) &frame->uc; /* a2: ucontext pointer */
wrusp((unsigned long) frame);
@ -456,22 +439,17 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
* OK, we're invoking a handler.
*/
static inline void
handle_signal(int sig, struct k_sigaction *ka, siginfo_t *info,
struct pt_regs * regs)
handle_signal(struct ksignal *ksig, struct pt_regs *regs)
{
sigset_t *oldset = sigmask_to_save();
int ret;
if (ka->sa.sa_flags & SA_SIGINFO)
ret = setup_rt_frame(sig, ka, info, oldset, regs);
if (ksig->ka.sa.sa_flags & SA_SIGINFO)
ret = setup_rt_frame(ksig, oldset, regs);
else
ret = setup_frame(sig, ka, oldset, regs);
ret = setup_frame(ksig, oldset, regs);
if (ret) {
force_sigsegv(sig, current);
return;
}
signal_delivered(sig, info, ka, regs, 0);
signal_setup_done(ret, ksig, 0);
}
static inline void
@ -514,47 +492,38 @@ syscall_restart(unsigned long r0, unsigned long r19,
static void
do_signal(struct pt_regs *regs, unsigned long r0, unsigned long r19)
{
siginfo_t info;
int signr;
unsigned long single_stepping = ptrace_cancel_bpt(current);
struct k_sigaction ka;
struct ksignal ksig;
/* This lets the debugger run, ... */
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
/* ... so re-check the single stepping. */
single_stepping |= ptrace_cancel_bpt(current);
if (signr > 0) {
if (get_signal(&ksig)) {
/* ... so re-check the single stepping. */
single_stepping |= ptrace_cancel_bpt(current);
/* Whee! Actually deliver the signal. */
if (r0)
syscall_restart(r0, r19, regs, &ka);
handle_signal(signr, &ka, &info, regs);
if (single_stepping)
ptrace_set_bpt(current); /* re-set bpt */
return;
}
if (r0) {
switch (regs->r0) {
case ERESTARTNOHAND:
case ERESTARTSYS:
case ERESTARTNOINTR:
/* Reset v0 and a3 and replay syscall. */
regs->r0 = r0;
regs->r19 = r19;
regs->pc -= 4;
break;
case ERESTART_RESTARTBLOCK:
/* Force v0 to the restart syscall and reply. */
regs->r0 = __NR_restart_syscall;
regs->pc -= 4;
break;
syscall_restart(r0, r19, regs, &ksig.ka);
handle_signal(&ksig, regs);
} else {
single_stepping |= ptrace_cancel_bpt(current);
if (r0) {
switch (regs->r0) {
case ERESTARTNOHAND:
case ERESTARTSYS:
case ERESTARTNOINTR:
/* Reset v0 and a3 and replay syscall. */
regs->r0 = r0;
regs->r19 = r19;
regs->pc -= 4;
break;
case ERESTART_RESTARTBLOCK:
/* Set v0 to the restart_syscall and replay */
regs->r0 = __NR_restart_syscall;
regs->pc -= 4;
break;
}
}
restore_saved_sigmask();
}
/* If there's no signal to deliver, we just restore the saved mask. */
restore_saved_sigmask();
if (single_stepping)
ptrace_set_bpt(current); /* re-set breakpoint */
}

2
arch/arm/Kconfig
View File

@ -56,6 +56,8 @@ config ARM
select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
select MODULES_USE_ELF_REL
select CLONE_BACKWARDS
select OLD_SIGSUSPEND3
select OLD_SIGACTION
help
The ARM series is a line of low-power-consumption RISC chip designs
licensed by ARM Ltd and targeted at embedded applications and

18
arch/arm/include/asm/signal.h
View File

@ -16,23 +16,7 @@ typedef struct {
unsigned long sig[_NSIG_WORDS];
} sigset_t;
struct old_sigaction {
__sighandler_t sa_handler;
old_sigset_t sa_mask;
unsigned long sa_flags;
__sigrestore_t sa_restorer;
};
struct sigaction {
__sighandler_t sa_handler;
unsigned long sa_flags;
__sigrestore_t sa_restorer;
sigset_t sa_mask; /* mask last for extensibility */
};
struct k_sigaction {
struct sigaction sa;
};
#define __ARCH_HAS_SA_RESTORER
#include <asm/sigcontext.h>
#endif

2
arch/arm/include/asm/unistd.h
View File

@ -26,8 +26,6 @@
#define __ARCH_WANT_SYS_NICE
#define __ARCH_WANT_SYS_SIGPENDING
#define __ARCH_WANT_SYS_SIGPROCMASK
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_SYS_OLD_MMAP
#define __ARCH_WANT_SYS_OLD_SELECT

2
arch/arm/kernel/calls.S
View File

@ -195,7 +195,7 @@
CALL(sys_getcwd)
CALL(sys_capget)
/* 185 */ CALL(sys_capset)
CALL(sys_sigaltstack_wrapper)
CALL(sys_sigaltstack)
CALL(sys_sendfile)
CALL(sys_ni_syscall) /* getpmsg */
CALL(sys_ni_syscall) /* putpmsg */

5
arch/arm/kernel/entry-common.S
View File

@ -514,11 +514,6 @@ sys_rt_sigreturn_wrapper:
b sys_rt_sigreturn
ENDPROC(sys_rt_sigreturn_wrapper)
sys_sigaltstack_wrapper:
ldr r2, [sp, #S_OFF + S_SP]
b do_sigaltstack
ENDPROC(sys_sigaltstack_wrapper)
sys_statfs64_wrapper:
teq r1, #88
moveq r1, #84

162
arch/arm/kernel/signal.c
View File

@ -45,48 +45,6 @@ const unsigned long sigreturn_codes[7] = {
MOV_R7_NR_RT_SIGRETURN, SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN,
};
/*
* atomically swap in the new signal mask, and wait for a signal.
*/
asmlinkage int sys_sigsuspend(int restart, unsigned long oldmask, old_sigset_t mask)
{
sigset_t blocked;
siginitset(&blocked, mask);
return sigsuspend(&blocked);
}
asmlinkage int
sys_sigaction(int sig, const struct old_sigaction __user *act,
struct old_sigaction __user *oact)
{
struct k_sigaction new_ka, old_ka;
int ret;
if (act) {
old_sigset_t mask;
if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
__get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
__get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
__get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
__get_user(mask, &act->sa_mask))
return -EFAULT;
siginitset(&new_ka.sa.sa_mask, mask);
}
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
if (!ret && oact) {
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
__put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
__put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
__put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
__put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
return -EFAULT;
}
return ret;
}
#ifdef CONFIG_CRUNCH
static int preserve_crunch_context(struct crunch_sigframe __user *frame)
{
@ -300,7 +258,7 @@ asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
if (restore_sigframe(regs, &frame->sig))
goto badframe;
if (do_sigaltstack(&frame->sig.uc.uc_stack, NULL, regs->ARM_sp) == -EFAULT)
if (restore_altstack(&frame->sig.uc.uc_stack))
goto badframe;
return regs->ARM_r0;
@ -360,17 +318,11 @@ setup_sigframe(struct sigframe __user *sf, struct pt_regs *regs, sigset_t *set)
}
static inline void __user *
get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, int framesize)
get_sigframe(struct ksignal *ksig, struct pt_regs *regs, int framesize)
{
unsigned long sp = regs->ARM_sp;
unsigned long sp = sigsp(regs->ARM_sp, ksig);
void __user *frame;
/*
* This is the X/Open sanctioned signal stack switching.
*/
if ((ka->sa.sa_flags & SA_ONSTACK) && !sas_ss_flags(sp))
sp = current->sas_ss_sp + current->sas_ss_size;
/*
* ATPCS B01 mandates 8-byte alignment
*/
@ -385,11 +337,22 @@ get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, int framesize)
return frame;
}
static int
setup_return(struct pt_regs *regs, struct k_sigaction *ka,
unsigned long __user *rc, void __user *frame, int usig)
/*
* translate the signal
*/
static inline int map_sig(int sig)
{
unsigned long handler = (unsigned long)ka->sa.sa_handler;
struct thread_info *thread = current_thread_info();
if (sig < 32 && thread->exec_domain && thread->exec_domain->signal_invmap)
sig = thread->exec_domain->signal_invmap[sig];
return sig;
}
static int
setup_return(struct pt_regs *regs, struct ksignal *ksig,
unsigned long __user *rc, void __user *frame)
{
unsigned long handler = (unsigned long)ksig->ka.sa.sa_handler;
unsigned long retcode;
int thumb = 0;
unsigned long cpsr = regs->ARM_cpsr & ~(PSR_f | PSR_E_BIT);
@ -399,7 +362,7 @@ setup_return(struct pt_regs *regs, struct k_sigaction *ka,
/*
* Maybe we need to deliver a 32-bit signal to a 26-bit task.
*/
if (ka->sa.sa_flags & SA_THIRTYTWO)
if (ksig->ka.sa.sa_flags & SA_THIRTYTWO)
cpsr = (cpsr & ~MODE_MASK) | USR_MODE;
#ifdef CONFIG_ARM_THUMB
@ -421,12 +384,12 @@ setup_return(struct pt_regs *regs, struct k_sigaction *ka,
}
#endif
if (ka->sa.sa_flags & SA_RESTORER) {
retcode = (unsigned long)ka->sa.sa_restorer;
if (ksig->ka.sa.sa_flags & SA_RESTORER) {
retcode = (unsigned long)ksig->ka.sa.sa_restorer;
} else {
unsigned int idx = thumb << 1;
if (ka->sa.sa_flags & SA_SIGINFO)
if (ksig->ka.sa.sa_flags & SA_SIGINFO)
idx += 3;
if (__put_user(sigreturn_codes[idx], rc) ||
@ -451,7 +414,7 @@ setup_return(struct pt_regs *regs, struct k_sigaction *ka,
}
}
regs->ARM_r0 = usig;
regs->ARM_r0 = map_sig(ksig->sig);
regs->ARM_sp = (unsigned long)frame;
regs->ARM_lr = retcode;
regs->ARM_pc = handler;
@ -461,9 +424,9 @@ setup_return(struct pt_regs *regs, struct k_sigaction *ka,
}
static int
setup_frame(int usig, struct k_sigaction *ka, sigset_t *set, struct pt_regs *regs)
setup_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs)
{
struct sigframe __user *frame = get_sigframe(ka, regs, sizeof(*frame));
struct sigframe __user *frame = get_sigframe(ksig, regs, sizeof(*frame));
int err = 0;
if (!frame)
@ -476,36 +439,29 @@ setup_frame(int usig, struct k_sigaction *ka, sigset_t *set, struct pt_regs *reg
err |= setup_sigframe(frame, regs, set);
if (err == 0)
err = setup_return(regs, ka, frame->retcode, frame, usig);
err = setup_return(regs, ksig, frame->retcode, frame);
return err;
}
static int
setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
sigset_t *set, struct pt_regs *regs)
setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs)
{
struct rt_sigframe __user *frame = get_sigframe(ka, regs, sizeof(*frame));
stack_t stack;
struct rt_sigframe __user *frame = get_sigframe(ksig, regs, sizeof(*frame));
int err = 0;
if (!frame)
return 1;
err |= copy_siginfo_to_user(&frame->info, info);
err |= copy_siginfo_to_user(&frame->info, &ksig->info);
__put_user_error(0, &frame->sig.uc.uc_flags, err);
__put_user_error(NULL, &frame->sig.uc.uc_link, err);
memset(&stack, 0, sizeof(stack));
stack.ss_sp = (void __user *)current->sas_ss_sp;
stack.ss_flags = sas_ss_flags(regs->ARM_sp);
stack.ss_size = current->sas_ss_size;
err |= __copy_to_user(&frame->sig.uc.uc_stack, &stack, sizeof(stack));
err |= __save_altstack(&frame->sig.uc.uc_stack, regs->ARM_sp);
err |= setup_sigframe(&frame->sig, regs, set);
if (err == 0)
err = setup_return(regs, ka, frame->sig.retcode, frame, usig);
err = setup_return(regs, ksig, frame->sig.retcode, frame);
if (err == 0) {
/*
@ -523,40 +479,25 @@ setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
/*
* OK, we're invoking a handler
*/
static void
handle_signal(unsigned long sig, struct k_sigaction *ka,
siginfo_t *info, struct pt_regs *regs)
static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)
{
struct thread_info *thread = current_thread_info();
struct task_struct *tsk = current;
sigset_t *oldset = sigmask_to_save();
int usig = sig;
int ret;
/*
* translate the signal
*/
if (usig < 32 && thread->exec_domain && thread->exec_domain->signal_invmap)
usig = thread->exec_domain->signal_invmap[usig];
/*
* Set up the stack frame
*/
if (ka->sa.sa_flags & SA_SIGINFO)
ret = setup_rt_frame(usig, ka, info, oldset, regs);
if (ksig->ka.sa.sa_flags & SA_SIGINFO)
ret = setup_rt_frame(ksig, oldset, regs);
else
ret = setup_frame(usig, ka, oldset, regs);
ret = setup_frame(ksig, oldset, regs);
/*
* Check that the resulting registers are actually sane.
*/
ret |= !valid_user_regs(regs);
if (ret != 0) {
force_sigsegv(sig, tsk);
return;
}
signal_delivered(sig, info, ka, regs, 0);
signal_setup_done(ret, ksig, 0);
}
/*
@ -571,9 +512,7 @@ handle_signal(unsigned long sig, struct k_sigaction *ka,
static int do_signal(struct pt_regs *regs, int syscall)
{
unsigned int retval = 0, continue_addr = 0, restart_addr = 0;
struct k_sigaction ka;
siginfo_t info;
int signr;
struct ksignal ksig;
int restart = 0;
/*
@ -605,33 +544,32 @@ static int do_signal(struct pt_regs *regs, int syscall)
* Get the signal to deliver. When running under ptrace, at this
* point the debugger may change all our registers ...
*/
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
/*
* Depending on the signal settings we may need to revert the
* decision to restart the system call. But skip this if a
* debugger has chosen to restart at a different PC.
*/
if (regs->ARM_pc != restart_addr)
restart = 0;
if (signr > 0) {
if (unlikely(restart)) {
if (get_signal(&ksig)) {
/* handler */
if (unlikely(restart) && regs->ARM_pc == restart_addr) {
if (retval == -ERESTARTNOHAND ||
retval == -ERESTART_RESTARTBLOCK
|| (retval == -ERESTARTSYS
&& !(ka.sa.sa_flags & SA_RESTART))) {
&& !(ksig.ka.sa.sa_flags & SA_RESTART))) {
regs->ARM_r0 = -EINTR;
regs->ARM_pc = continue_addr;
}
}
handle_signal(signr, &ka, &info, regs);
return 0;
handle_signal(&ksig, regs);
} else {
/* no handler */
restore_saved_sigmask();
if (unlikely(restart) && regs->ARM_pc == restart_addr) {
regs->ARM_pc = continue_addr;
return restart;
}
}
restore_saved_sigmask();
if (unlikely(restart))
regs->ARM_pc = continue_addr;
return restart;
return 0;
}
asmlinkage int

2
arch/arm64/Kconfig
View File

@ -205,6 +205,8 @@ config COMPAT
depends on !ARM64_64K_PAGES
select COMPAT_BINFMT_ELF
select HAVE_UID16
select OLD_SIGSUSPEND3
select COMPAT_OLD_SIGACTION
help
This option enables support for a 32-bit EL0 running under a 64-bit
kernel at EL1. AArch32-specific components such as system calls,

2
arch/arm64/include/asm/syscalls.h
View File

@ -24,8 +24,6 @@
* System call wrappers implemented in kernel/entry.S.
*/
asmlinkage long sys_rt_sigreturn_wrapper(void);
asmlinkage long sys_sigaltstack_wrapper(const stack_t __user *uss,
stack_t __user *uoss);
#include <asm-generic/syscalls.h>

2
arch/arm64/include/asm/unistd.h
View File

@ -20,10 +20,8 @@
#define __ARCH_WANT_SYS_GETPGRP
#define __ARCH_WANT_SYS_LLSEEK
#define __ARCH_WANT_SYS_NICE
#define __ARCH_WANT_COMPAT_SYS_SCHED_RR_GET_INTERVAL
#define __ARCH_WANT_SYS_SIGPENDING
#define __ARCH_WANT_SYS_SIGPROCMASK
#define __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_COMPAT_SYS_SENDFILE
#define __ARCH_WANT_SYS_FORK
#define __ARCH_WANT_SYS_VFORK

4
arch/arm64/include/asm/unistd32.h
View File

@ -93,7 +93,7 @@ __SYSCALL(68, sys_ni_syscall) /* 68 was sys_sgetmask */
__SYSCALL(69, sys_ni_syscall) /* 69 was sys_ssetmask */
__SYSCALL(70, sys_setreuid16)
__SYSCALL(71, sys_setregid16)
__SYSCALL(72, compat_sys_sigsuspend)
__SYSCALL(72, sys_sigsuspend)
__SYSCALL(73, compat_sys_sigpending)
__SYSCALL(74, sys_sethostname)
__SYSCALL(75, compat_sys_setrlimit)
@ -207,7 +207,7 @@ __SYSCALL(182, sys_chown16)
__SYSCALL(183, sys_getcwd)
__SYSCALL(184, sys_capget)
__SYSCALL(185, sys_capset)
__SYSCALL(186, compat_sys_sigaltstack_wrapper)
__SYSCALL(186, compat_sys_sigaltstack)
__SYSCALL(187, compat_sys_sendfile)
__SYSCALL(188, sys_ni_syscall) /* 188 reserved */
__SYSCALL(189, sys_ni_syscall) /* 189 reserved */

5
arch/arm64/kernel/entry.S
View File

@ -677,10 +677,5 @@ ENTRY(sys_rt_sigreturn_wrapper)
b sys_rt_sigreturn
ENDPROC(sys_rt_sigreturn_wrapper)
ENTRY(sys_sigaltstack_wrapper)
ldr x2, [sp, #S_SP]
b sys_sigaltstack
ENDPROC(sys_sigaltstack_wrapper)
ENTRY(handle_arch_irq)
.quad 0

17
arch/arm64/kernel/signal.c
View File

@ -149,8 +149,7 @@ asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
if (restore_sigframe(regs, frame))
goto badframe;
if (do_sigaltstack(&frame->uc.uc_stack,
NULL, regs->sp) == -EFAULT)
if (restore_altstack(&frame->uc.uc_stack))
goto badframe;
return regs->regs[0];
@ -164,12 +163,6 @@ badframe:
return 0;
}
asmlinkage long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
unsigned long sp)
{
return do_sigaltstack(uss, uoss, sp);
}
static int setup_sigframe(struct rt_sigframe __user *sf,
struct pt_regs *regs, sigset_t *set)
{
@ -250,7 +243,6 @@ static int setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
sigset_t *set, struct pt_regs *regs)
{
struct rt_sigframe __user *frame;
stack_t stack;
int err = 0;
frame = get_sigframe(ka, regs);
@ -260,12 +252,7 @@ static int setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
__put_user_error(0, &frame->uc.uc_flags, err);
__put_user_error(NULL, &frame->uc.uc_link, err);
memset(&stack, 0, sizeof(stack));
stack.ss_sp = (void __user *)current->sas_ss_sp;
stack.ss_flags = sas_ss_flags(regs->sp);
stack.ss_size = current->sas_ss_size;
err |= __copy_to_user(&frame->uc.uc_stack, &stack, sizeof(stack));
err |= __save_altstack(&frame->uc.uc_stack, regs->sp);
err |= setup_sigframe(frame, regs, set);
if (err == 0) {
setup_return(regs, ka, frame, usig);

220
arch/arm64/kernel/signal32.c
View File

@ -28,26 +28,6 @@
#include <asm/uaccess.h>
#include <asm/unistd32.h>
struct compat_sigaction {
compat_uptr_t sa_handler;
compat_ulong_t sa_flags;
compat_uptr_t sa_restorer;
compat_sigset_t sa_mask;
};
struct compat_old_sigaction {
compat_uptr_t sa_handler;
compat_old_sigset_t sa_mask;
compat_ulong_t sa_flags;
compat_uptr_t sa_restorer;
};
typedef struct compat_sigaltstack {
compat_uptr_t ss_sp;
int ss_flags;
compat_size_t ss_size;
} compat_stack_t;
struct compat_sigcontext {
/* We always set these two fields to 0 */
compat_ulong_t trap_no;
@ -339,127 +319,6 @@ static int compat_restore_vfp_context(struct compat_vfp_sigframe __user *frame)
return err ? -EFAULT : 0;
}
/*
* atomically swap in the new signal mask, and wait for a signal.
*/
asmlinkage int compat_sys_sigsuspend(int restart, compat_ulong_t oldmask,
compat_old_sigset_t mask)
{
sigset_t blocked;
siginitset(&current->blocked, mask);
return sigsuspend(&blocked);
}
asmlinkage int compat_sys_sigaction(int sig,
const struct compat_old_sigaction __user *act,
struct compat_old_sigaction __user *oact)
{
struct k_sigaction new_ka, old_ka;
int ret;
compat_old_sigset_t mask;
compat_uptr_t handler, restorer;
if (act) {
if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
__get_user(handler, &act->sa_handler) ||
__get_user(restorer, &act->sa_restorer) ||
__get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
__get_user(mask, &act->sa_mask))
return -EFAULT;
new_ka.sa.sa_handler = compat_ptr(handler);
new_ka.sa.sa_restorer = compat_ptr(restorer);
siginitset(&new_ka.sa.sa_mask, mask);
}
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
if (!ret && oact) {
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
__put_user(ptr_to_compat(old_ka.sa.sa_handler),
&oact->sa_handler) ||
__put_user(ptr_to_compat(old_ka.sa.sa_restorer),
&oact->sa_restorer) ||
__put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
__put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
return -EFAULT;
}
return ret;
}
asmlinkage int compat_sys_rt_sigaction(int sig,
const struct compat_sigaction __user *act,
struct compat_sigaction __user *oact,
compat_size_t sigsetsize)
{
struct k_sigaction new_ka, old_ka;
int ret;
/* XXX: Don't preclude handling different sized sigset_t's. */
if (sigsetsize != sizeof(compat_sigset_t))
return -EINVAL;
if (act) {
compat_uptr_t handler, restorer;
ret = get_user(handler, &act->sa_handler);
new_ka.sa.sa_handler = compat_ptr(handler);
ret |= get_user(restorer, &act->sa_restorer);
new_ka.sa.sa_restorer = compat_ptr(restorer);
ret |= get_sigset_t(&new_ka.sa.sa_mask, &act->sa_mask);
ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
if (ret)
return -EFAULT;
}
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
if (!ret && oact) {
ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
ret |= put_sigset_t(&oact->sa_mask, &old_ka.sa.sa_mask);
ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
}
return ret;
}
int compat_do_sigaltstack(compat_uptr_t compat_uss, compat_uptr_t compat_uoss,
compat_ulong_t sp)
{
compat_stack_t __user *newstack = compat_ptr(compat_uss);
compat_stack_t __user *oldstack = compat_ptr(compat_uoss);
compat_uptr_t ss_sp;
int ret;
mm_segment_t old_fs;
stack_t uss, uoss;
/* Marshall the compat new stack into a stack_t */
if (newstack) {
if (get_user(ss_sp, &newstack->ss_sp) ||
__get_user(uss.ss_flags, &newstack->ss_flags) ||
__get_user(uss.ss_size, &newstack->ss_size))
return -EFAULT;
uss.ss_sp = compat_ptr(ss_sp);
}
old_fs = get_fs();
set_fs(KERNEL_DS);
/* The __user pointer casts are valid because of the set_fs() */
ret = do_sigaltstack(
newstack ? (stack_t __user *) &uss : NULL,
oldstack ? (stack_t __user *) &uoss : NULL,
(unsigned long)sp);
set_fs(old_fs);
/* Convert the old stack_t into a compat stack. */
if (!ret && oldstack &&
(put_user(ptr_to_compat(uoss.ss_sp), &oldstack->ss_sp) ||
__put_user(uoss.ss_flags, &oldstack->ss_flags) ||
__put_user(uoss.ss_size, &oldstack->ss_size)))
return -EFAULT;
return ret;
}
static int compat_restore_sigframe(struct pt_regs *regs,
struct compat_sigframe __user *sf)
{
@ -562,9 +421,7 @@ asmlinkage int compat_sys_rt_sigreturn(struct pt_regs *regs)
if (compat_restore_sigframe(regs, &frame->sig))
goto badframe;
if (compat_do_sigaltstack(ptr_to_compat(&frame->sig.uc.uc_stack),
ptr_to_compat((void __user *)NULL),
regs->compat_sp) == -EFAULT)
if (compat_restore_altstack(&frame->sig.uc.uc_stack))
goto badframe;
return regs->regs[0];
@ -705,11 +562,7 @@ int compat_setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
__put_user_error(0, &frame->sig.uc.uc_flags, err);
__put_user_error(0, &frame->sig.uc.uc_link, err);
memset(&stack, 0, sizeof(stack));
stack.ss_sp = (compat_uptr_t)current->sas_ss_sp;
stack.ss_flags = sas_ss_flags(regs->compat_sp);
stack.ss_size = current->sas_ss_size;
err |= __copy_to_user(&frame->sig.uc.uc_stack, &stack, sizeof(stack));
err |= __compat_save_altstack(&frame->sig.uc.uc_stack, regs->compat_sp);
err |= compat_setup_sigframe(&frame->sig, regs, set);
@ -742,75 +595,6 @@ int compat_setup_frame(int usig, struct k_sigaction *ka, sigset_t *set,
return err;
}
/*
* RT signals don't have generic compat wrappers.
* See arch/powerpc/kernel/signal_32.c
*/
asmlinkage int compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
compat_sigset_t __user *oset,
compat_size_t sigsetsize)
{
sigset_t s;
sigset_t __user *up;
int ret;
mm_segment_t old_fs = get_fs();
if (set) {
if (get_sigset_t(&s, set))
return -EFAULT;
}
set_fs(KERNEL_DS);
/* This is valid because of the set_fs() */
up = (sigset_t __user *) &s;
ret = sys_rt_sigprocmask(how, set ? up : NULL, oset ? up : NULL,
sigsetsize);
set_fs(old_fs);
if (ret)
return ret;
if (oset) {
if (put_sigset_t(oset, &s))
return -EFAULT;
}
return 0;
}
asmlinkage int compat_sys_rt_sigpending(compat_sigset_t __user *set,
compat_size_t sigsetsize)
{
sigset_t s;
int ret;
mm_segment_t old_fs = get_fs();
set_fs(KERNEL_DS);
/* The __user pointer cast is valid because of the set_fs() */
ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
set_fs(old_fs);
if (!ret) {
if (put_sigset_t(set, &s))
return -EFAULT;
}
return ret;
}
asmlinkage int compat_sys_rt_sigqueueinfo(int pid, int sig,
compat_siginfo_t __user *uinfo)
{
siginfo_t info;
int ret;
mm_segment_t old_fs = get_fs();
ret = copy_siginfo_from_user32(&info, uinfo);
if (unlikely(ret))
return ret;
set_fs (KERNEL_DS);
/* The __user pointer cast is valid because of the set_fs() */
ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
set_fs (old_fs);
return ret;
}
void compat_setup_restart_syscall(struct pt_regs *regs)
{
regs->regs[7] = __NR_compat_restart_syscall;

1
arch/arm64/kernel/sys.c
View File

@ -40,7 +40,6 @@ asmlinkage long sys_mmap(unsigned long addr, unsigned long len,
* Wrappers to pass the pt_regs argument.
*/
#define sys_rt_sigreturn sys_rt_sigreturn_wrapper
#define sys_sigaltstack sys_sigaltstack_wrapper
#include <asm/syscalls.h>

5
arch/arm64/kernel/sys32.S
View File

@ -39,11 +39,6 @@ compat_sys_rt_sigreturn_wrapper:
b compat_sys_rt_sigreturn
ENDPROC(compat_sys_rt_sigreturn_wrapper)
compat_sys_sigaltstack_wrapper:
ldr x2, [sp, #S_COMPAT_SP]
b compat_do_sigaltstack
ENDPROC(compat_sys_sigaltstack_wrapper)
compat_sys_statfs64_wrapper:
mov w3, #84
cmp w1, #88

11
arch/avr32/include/asm/signal.h
View File

@ -23,16 +23,7 @@ typedef struct {
unsigned long sig[_NSIG_WORDS];
} sigset_t;
struct sigaction {
__sighandler_t sa_handler;
unsigned long sa_flags;
__sigrestore_t sa_restorer;
sigset_t sa_mask; /* mask last for extensibility */
};
struct k_sigaction {
struct sigaction sa;
};
#define __ARCH_HAS_SA_RESTORER
#include <asm/sigcontext.h>
#undef __HAVE_ARCH_SIG_BITOPS

2
arch/avr32/include/asm/unistd.h
View File

@ -37,8 +37,6 @@
#define __ARCH_WANT_SYS_GETPGRP
#define __ARCH_WANT_SYS_LLSEEK
#define __ARCH_WANT_SYS_GETPGRP
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_SYS_FORK
#define __ARCH_WANT_SYS_VFORK
#define __ARCH_WANT_SYS_CLONE

15
arch/avr32/kernel/signal.c
View File

@ -21,12 +21,6 @@
#include <asm/ucontext.h>
#include <asm/syscalls.h>
asmlinkage int sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
struct pt_regs *regs)
{
return do_sigaltstack(uss, uoss, regs->sp);
}
struct rt_sigframe
{
struct siginfo info;
@ -91,7 +85,7 @@ asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
goto badframe;
if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->sp) == -EFAULT)
if (restore_altstack(&frame->uc.uc_stack))
goto badframe;
pr_debug("Context restored: pc = %08lx, lr = %08lx, sp = %08lx\n",
@ -175,12 +169,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
/* Set up the ucontext */
err |= __put_user(0, &frame->uc.uc_flags);
err |= __put_user(NULL, &frame->uc.uc_link);
err |= __put_user((void __user *)current->sas_ss_sp,
&frame->uc.uc_stack.ss_sp);
err |= __put_user(sas_ss_flags(regs->sp),
&frame->uc.uc_stack.ss_flags);
err |= __put_user(current->sas_ss_size,
&frame->uc.uc_stack.ss_size);
err |= __save_altstack(&frame->uc.uc_stack, regs->sp);
err |= setup_sigcontext(&frame->uc.uc_mcontext, regs);
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));

6
arch/avr32/kernel/syscall-stubs.S
View File

@ -20,12 +20,6 @@ __sys_rt_sigsuspend:
mov r10, sp
rjmp sys_rt_sigsuspend
.global __sys_sigaltstack
.type __sys_sigaltstack,@function
__sys_sigaltstack:
mov r10, sp
rjmp sys_sigaltstack
.global __sys_rt_sigreturn
.type __sys_rt_sigreturn,@function
__sys_rt_sigreturn:

2
arch/avr32/kernel/syscall_table.S
View File

@ -115,7 +115,7 @@ sys_call_table:
.long sys_statfs
.long sys_fstatfs /* 100 */
.long sys_vhangup
.long __sys_sigaltstack
.long sys_sigaltstack
.long sys_syslog
.long sys_setitimer
.long sys_getitimer /* 105 */

2
arch/blackfin/include/asm/unistd.h
View File

@ -18,8 +18,6 @@
#define __ARCH_WANT_SYS_GETPGRP
#define __ARCH_WANT_SYS_LLSEEK
#define __ARCH_WANT_SYS_NICE
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_SYS_VFORK
/*

12
arch/blackfin/kernel/signal.c
View File

@ -37,11 +37,6 @@ struct rt_sigframe {
struct ucontext uc;
};
asmlinkage int sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
{
return do_sigaltstack(uss, uoss, rdusp());
}
static inline int
rt_restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, int *pr0)
{
@ -100,7 +95,7 @@ asmlinkage int sys_rt_sigreturn(void)
if (rt_restore_sigcontext(regs, &frame->uc.uc_mcontext, &r0))
goto badframe;
if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->usp) == -EFAULT)
if (restore_altstack(&frame->uc.uc_stack))
goto badframe;
return r0;
@ -178,10 +173,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t * info,
/* Create the ucontext. */
err |= __put_user(0, &frame->uc.uc_flags);
err |= __put_user(0, &frame->uc.uc_link);
err |=
__put_user((void *)current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
err |= __put_user(sas_ss_flags(rdusp()), &frame->uc.uc_stack.ss_flags);
err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
err |= __save_altstack(&frame->uc.uc_stack, rdusp());
err |= rt_setup_sigcontext(&frame->uc.uc_mcontext, regs);
err |= copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));

12
arch/c6x/kernel/entry.S
View File

@ -598,18 +598,6 @@ ENTRY(enable_exception)
NOP 5
ENDPROC(enable_exception)
ENTRY(sys_sigaltstack)
#ifdef CONFIG_C6X_BIG_KERNEL
MVKL .S1 do_sigaltstack,A0 ; branch to do_sigaltstack
MVKH .S1 do_sigaltstack,A0
B .S2X A0
#else
B .S2 do_sigaltstack
#endif
LDW .D2T1 *+SP(REGS_SP+8),A6
NOP 4
ENDPROC(sys_sigaltstack)
;;
;; Special system calls
;; return address is in B3

2
arch/cris/Kconfig
View File

@ -50,6 +50,8 @@ config CRIS
select GENERIC_CMOS_UPDATE
select MODULES_USE_ELF_RELA
select CLONE_BACKWARDS2
select OLD_SIGSUSPEND
select OLD_SIGACTION
config HZ
int

65
arch/cris/arch-v10/kernel/signal.c
View File

@ -41,55 +41,6 @@
void do_signal(int canrestart, struct pt_regs *regs);
/*
* Atomically swap in the new signal mask, and wait for a signal. Define
* dummy arguments to be able to reach the regs argument. (Note that this
* arrangement relies on old_sigset_t occupying one register.)
*/
int sys_sigsuspend(old_sigset_t mask)
{
sigset_t blocked;
siginitset(&blocked, mask);
return sigsuspend(&blocked);
}
int sys_sigaction(int sig, const struct old_sigaction __user *act,
struct old_sigaction *oact)
{
struct k_sigaction new_ka, old_ka;
int ret;
if (act) {
old_sigset_t mask;
if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
__get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
__get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
__get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
__get_user(mask, &act->sa_mask))
return -EFAULT;
siginitset(&new_ka.sa.sa_mask, mask);
}
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
if (!ret && oact) {
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
__put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
__put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
__put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
__put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
return -EFAULT;
}
return ret;
}
int sys_sigaltstack(const stack_t *uss, stack_t __user *uoss)
{
return do_sigaltstack(uss, uoss, rdusp());
}
/*
* Do a signal return; undo the signal stack.
*/
@ -150,11 +101,9 @@ badframe:
return 1;
}
/* Define dummy arguments to be able to reach the regs argument. */
asmlinkage int sys_sigreturn(long r10, long r11, long r12, long r13, long mof,
long srp, struct pt_regs *regs)
asmlinkage int sys_sigreturn(void)
{
struct pt_regs *regs = current_pt_regs();
struct sigframe __user *frame = (struct sigframe *)rdusp();
sigset_t set;
@ -188,11 +137,9 @@ badframe:
return 0;
}
/* Define dummy arguments to be able to reach the regs argument. */
asmlinkage int sys_rt_sigreturn(long r10, long r11, long r12, long r13,
long mof, long srp, struct pt_regs *regs)
asmlinkage int sys_rt_sigreturn(void)
{
struct pt_regs *regs = current_pt_regs();
struct rt_sigframe __user *frame = (struct rt_sigframe *)rdusp();
sigset_t set;
@ -214,7 +161,7 @@ asmlinkage int sys_rt_sigreturn(long r10, long r11, long r12, long r13,
if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
goto badframe;
if (do_sigaltstack(&frame->uc.uc_stack, NULL, rdusp()) == -EFAULT)
if (restore_altstack(&frame->uc.uc_stack))
goto badframe;
return regs->r10;
@ -362,6 +309,8 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
err |= __save_altstack(&frame->uc.uc_stack, rdusp());
if (err)
goto give_sigsegv;

68
arch/cris/arch-v32/kernel/signal.c
View File

@ -51,59 +51,6 @@ struct rt_signal_frame {
void do_signal(int restart, struct pt_regs *regs);
void keep_debug_flags(unsigned long oldccs, unsigned long oldspc,
struct pt_regs *regs);
/*
* Swap in the new signal mask, and wait for a signal. Define some
* dummy arguments to be able to reach the regs argument.
*/
int
sys_sigsuspend(old_sigset_t mask)
{
sigset_t blocked;
siginitset(&blocked, mask);
return sigsuspend(&blocked);
}
int
sys_sigaction(int signal, const struct old_sigaction *act,
struct old_sigaction *oact)
{
int retval;
struct k_sigaction newk;
struct k_sigaction oldk;
if (act) {
old_sigset_t mask;
if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
__get_user(newk.sa.sa_handler, &act->sa_handler) ||
__get_user(newk.sa.sa_restorer, &act->sa_restorer) ||
__get_user(newk.sa.sa_flags, &act->sa_flags) ||
__get_user(mask, &act->sa_mask))
return -EFAULT;
siginitset(&newk.sa.sa_mask, mask);
}
retval = do_sigaction(signal, act ? &newk : NULL, oact ? &oldk : NULL);
if (!retval && oact) {
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
__put_user(oldk.sa.sa_handler, &oact->sa_handler) ||
__put_user(oldk.sa.sa_restorer, &oact->sa_restorer) ||
__put_user(oldk.sa.sa_flags, &oact->sa_flags) ||
__put_user(oldk.sa.sa_mask.sig[0], &oact->sa_mask))
return -EFAULT;
}
return retval;
}
int
sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
{
return do_sigaltstack(uss, uoss, rdusp());
}
static int
restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
@ -135,11 +82,9 @@ badframe:
return 1;
}
/* Define some dummy arguments to be able to reach the regs argument. */
asmlinkage int
sys_sigreturn(long r10, long r11, long r12, long r13, long mof, long srp,
struct pt_regs *regs)
asmlinkage int sys_sigreturn(void)
{
struct pt_regs *regs = current_pt_regs();
sigset_t set;
struct signal_frame __user *frame;
unsigned long oldspc = regs->spc;
@ -178,11 +123,9 @@ badframe:
return 0;
}
/* Define some dummy variables to be able to reach the regs argument. */
asmlinkage int
sys_rt_sigreturn(long r10, long r11, long r12, long r13, long mof, long srp,
struct pt_regs *regs)
asmlinkage int sys_rt_sigreturn(void)
{
struct pt_regs *regs = current_pt_regs();
sigset_t set;
struct rt_signal_frame __user *frame;
unsigned long oldspc = regs->spc;
@ -209,7 +152,7 @@ sys_rt_sigreturn(long r10, long r11, long r12, long r13, long mof, long srp,
if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
goto badframe;
if (do_sigaltstack(&frame->uc.uc_stack, NULL, rdusp()) == -EFAULT)
if (restore_altstack(&frame->uc.uc_stack))
goto badframe;
keep_debug_flags(oldccs, oldspc, regs);
@ -371,6 +314,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext));
err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, set->sig[0]);
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
err |= __save_altstack(&frame->uc.uc_stack, rdusp());
if (err)
goto give_sigsegv;

17
arch/cris/include/asm/signal.h
View File

@ -16,23 +16,8 @@ typedef struct {
unsigned long sig[_NSIG_WORDS];
} sigset_t;
struct old_sigaction {
__sighandler_t sa_handler;
old_sigset_t sa_mask;
unsigned long sa_flags;
void (*sa_restorer)(void);
};
#define __ARCH_HAS_SA_RESTORER
struct sigaction {
__sighandler_t sa_handler;
unsigned long sa_flags;
void (*sa_restorer)(void);
sigset_t sa_mask; /* mask last for extensibility */
};
struct k_sigaction {
struct sigaction sa;
};
#include <asm/sigcontext.h>
#endif

2
arch/cris/include/asm/unistd.h
View File

@ -30,8 +30,6 @@
#define __ARCH_WANT_SYS_OLDUMOUNT
#define __ARCH_WANT_SYS_SIGPENDING
#define __ARCH_WANT_SYS_SIGPROCMASK
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_SYS_FORK
#define __ARCH_WANT_SYS_VFORK
#define __ARCH_WANT_SYS_CLONE

2
arch/frv/Kconfig
View File

@ -11,6 +11,8 @@ config FRV
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select GENERIC_CPU_DEVICES
select ARCH_WANT_IPC_PARSE_VERSION
select OLD_SIGSUSPEND3
select OLD_SIGACTION
config ZONE_DMA
bool

7
arch/frv/include/asm/signal.h
View File

@ -3,11 +3,4 @@
#include <uapi/asm/signal.h>
struct old_sigaction {
__sighandler_t sa_handler;
old_sigset_t sa_mask;
unsigned long sa_flags;
__sigrestore_t sa_restorer;
};
#endif /* _ASM_SIGNAL_H */

2
arch/frv/include/asm/unistd.h
View File

@ -27,8 +27,6 @@
#define __ARCH_WANT_SYS_OLDUMOUNT
/* #define __ARCH_WANT_SYS_SIGPENDING */
#define __ARCH_WANT_SYS_SIGPROCMASK
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_SYS_FORK
#define __ARCH_WANT_SYS_VFORK
#define __ARCH_WANT_SYS_CLONE

55
arch/frv/kernel/signal.c
View File

@ -32,55 +32,6 @@ struct fdpic_func_descriptor {
unsigned long GOT;
};
/*
* Atomically swap in the new signal mask, and wait for a signal.
*/
asmlinkage int sys_sigsuspend(int history0, int history1, old_sigset_t mask)
{
sigset_t blocked;
siginitset(&blocked, mask);
return sigsuspend(&blocked);
}
asmlinkage int sys_sigaction(int sig,
const struct old_sigaction __user *act,
struct old_sigaction __user *oact)
{
struct k_sigaction new_ka, old_ka;
int ret;
if (act) {
old_sigset_t mask;
if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
__get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
__get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
__get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
__get_user(mask, &act->sa_mask))
return -EFAULT;
siginitset(&new_ka.sa.sa_mask, mask);
}
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
if (!ret && oact) {
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
__put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
__put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
__put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
__put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
return -EFAULT;
}
return ret;
}
asmlinkage
int sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
{
return do_sigaltstack(uss, uoss, __frame->sp);
}
/*
* Do a signal return; undo the signal stack.
*/
@ -173,7 +124,7 @@ asmlinkage int sys_rt_sigreturn(void)
if (restore_sigcontext(&frame->uc.uc_mcontext, &gr8))
goto badframe;
if (do_sigaltstack(&frame->uc.uc_stack, NULL, __frame->sp) == -EFAULT)
if (restore_altstack(&frame->uc.uc_stack))
goto badframe;
return gr8;
@ -345,9 +296,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
/* Create the ucontext. */
if (__put_user(0, &frame->uc.uc_flags) ||
__put_user(NULL, &frame->uc.uc_link) ||
__put_user((void __user *)current->sas_ss_sp, &frame->uc.uc_stack.ss_sp) ||
__put_user(sas_ss_flags(__frame->sp), &frame->uc.uc_stack.ss_flags) ||
__put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size))
__save_altstack(&frame->uc.uc_stack, __frame->sp))
goto give_sigsegv;
if (setup_sigcontext(&frame->uc.uc_mcontext, set->sig[0]))

2
arch/h8300/Kconfig
View File

@ -9,6 +9,8 @@ config H8300
select GENERIC_IRQ_SHOW
select GENERIC_CPU_DEVICES
select MODULES_USE_ELF_RELA
select OLD_SIGSUSPEND3
select OLD_SIGACTION
config SYMBOL_PREFIX
string

18
arch/h8300/include/asm/signal.h
View File

@ -16,23 +16,7 @@ typedef struct {
unsigned long sig[_NSIG_WORDS];
} sigset_t;
struct old_sigaction {
__sighandler_t sa_handler;
old_sigset_t sa_mask;
unsigned long sa_flags;
void (*sa_restorer)(void);
};
struct sigaction {
__sighandler_t sa_handler;
unsigned long sa_flags;
void (*sa_restorer)(void);
sigset_t sa_mask; /* mask last for extensibility */
};
struct k_sigaction {
struct sigaction sa;
};
#define __ARCH_HAS_SA_RESTORER
#include <asm/sigcontext.h>
#undef __HAVE_ARCH_SIG_BITOPS

2
arch/h8300/include/asm/unistd.h
View File

@ -29,8 +29,6 @@
#define __ARCH_WANT_SYS_OLDUMOUNT
#define __ARCH_WANT_SYS_SIGPENDING
#define __ARCH_WANT_SYS_SIGPROCMASK
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_SYS_FORK
#define __ARCH_WANT_SYS_VFORK
#define __ARCH_WANT_SYS_CLONE

72
arch/h8300/kernel/signal.c
View File

@ -46,56 +46,6 @@
#include <asm/traps.h>
#include <asm/ucontext.h>
/*
* Atomically swap in the new signal mask, and wait for a signal.
*/
asmlinkage int
sys_sigsuspend(int unused1, int unused2, old_sigset_t mask)
{
sigset_t blocked;
siginitset(&blocked, mask);
return sigsuspend(&blocked);
}
asmlinkage int
sys_sigaction(int sig, const struct old_sigaction *act,
struct old_sigaction *oact)
{
struct k_sigaction new_ka, old_ka;
int ret;
if (act) {
old_sigset_t mask;
if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
__get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
__get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
__get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
__get_user(mask, &act->sa_mask))
return -EFAULT;
siginitset(&new_ka.sa.sa_mask, mask);
}
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
if (!ret && oact) {
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
__put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
__put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
__put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
__put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
return -EFAULT;
}
return ret;
}
asmlinkage int
sys_sigaltstack(const stack_t *uss, stack_t *uoss)
{
return do_sigaltstack(uss, uoss, rdusp());
}
/*
* Do a signal return; undo the signal stack.
*
@ -136,9 +86,9 @@ struct rt_sigframe
} __attribute__((aligned(2),packed));
static inline int
restore_sigcontext(struct pt_regs *regs, struct sigcontext *usc,
int *pd0)
restore_sigcontext(struct sigcontext *usc, int *pd0)
{
struct pt_regs *regs = current_pt_regs();
int err = 0;
unsigned int ccr;
unsigned int usp;
@ -167,9 +117,8 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext *usc,
return err;
}
asmlinkage int do_sigreturn(unsigned long __unused,...)
asmlinkage int sys_sigreturn(void)
{
struct pt_regs *regs = (struct pt_regs *) (&__unused - 1);
unsigned long usp = rdusp();
struct sigframe *frame = (struct sigframe *)(usp - 4);
sigset_t set;
@ -185,7 +134,7 @@ asmlinkage int do_sigreturn(unsigned long __unused,...)
set_current_blocked(&set);
if (restore_sigcontext(regs, &frame->sc, &er0))
if (restore_sigcontext(&frame->sc, &er0))
goto badframe;
return er0;
@ -194,9 +143,8 @@ badframe:
return 0;
}
asmlinkage int do_rt_sigreturn(unsigned long __unused,...)
asmlinkage int sys_rt_sigreturn(void)
{
struct pt_regs *regs = (struct pt_regs *) &__unused;
unsigned long usp = rdusp();
struct rt_sigframe *frame = (struct rt_sigframe *)(usp - 4);
sigset_t set;
@ -209,10 +157,10 @@ asmlinkage int do_rt_sigreturn(unsigned long __unused,...)
set_current_blocked(&set);
if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &er0))
if (restore_sigcontext(&frame->uc.uc_mcontext, &er0))
goto badframe;
if (do_sigaltstack(&frame->uc.uc_stack, NULL, usp) == -EFAULT)
if (restore_altstack(&frame->uc.uc_stack))
goto badframe;
return er0;
@ -358,11 +306,7 @@ static int setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info,
/* Create the ucontext. */
err |= __put_user(0, &frame->uc.uc_flags);
err |= __put_user(0, &frame->uc.uc_link);
err |= __put_user((void *)current->sas_ss_sp,
&frame->uc.uc_stack.ss_sp);
err |= __put_user(sas_ss_flags(rdusp()),
&frame->uc.uc_stack.ss_flags);
err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
err |= __save_altstack(&frame->uc.uc_stack, rdusp());
err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, set->sig[0]);
err |= copy_to_user (&frame->uc.uc_sigmask, set, sizeof(*set));
if (err)

15
arch/h8300/kernel/syscalls.S
View File

@ -334,18 +334,3 @@ SYMBOL_NAME_LABEL(sys_call_table)
.long SYMBOL_NAME(sys_getcpu)
.long SYMBOL_NAME(sys_ni_syscall) /* sys_epoll_pwait */
.long SYMBOL_NAME(sys_setns) /* 320 */
.macro call_sp addr
mov.l #SYMBOL_NAME(\addr),er6
bra SYMBOL_NAME(syscall_trampoline):8
.endm
SYMBOL_NAME_LABEL(sys_sigreturn)
call_sp do_sigreturn
SYMBOL_NAME_LABEL(sys_rt_sigreturn)
call_sp do_rt_sigreturn
SYMBOL_NAME_LABEL(syscall_trampoline)
mov.l sp,er0
jmp @er6

16
arch/hexagon/kernel/signal.c
View File

@ -125,6 +125,7 @@ static int setup_rt_frame(int signr, struct k_sigaction *ka, siginfo_t *info,
err |= __put_user(0x5400c004, &frame->tramp[1]);
err |= setup_sigcontext(regs, &frame->uc.uc_mcontext);
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
err |= __save_altstack(&frame->uc.uc_stack, user_stack_pointer(regs));
if (err)
goto sigsegv;
@ -247,12 +248,6 @@ void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags)
/*
* Architecture-specific wrappers for signal-related system calls
*/
asmlinkage int sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
{
struct pt_regs *regs = current_pt_regs();
return do_sigaltstack(uss, uoss, regs->r29);
}
asmlinkage int sys_rt_sigreturn(void)
{
@ -288,14 +283,7 @@ asmlinkage int sys_rt_sigreturn(void)
*/
regs->syscall_nr = __NR_rt_sigreturn;
/*
* If we were meticulous, we'd only call this if we knew that
* we were actually going to use an alternate stack, and we'd
* consider any error to be fatal. What we do here, in common
* with many other architectures, is call it blindly and only
* consider the -EFAULT return case to be proof of a problem.
*/
if (do_sigaltstack(&frame->uc.uc_stack, NULL, pt_psp(regs)) == -EFAULT)
if (restore_altstack(&frame->uc.uc_stack))
goto badframe;
return 0;

10
arch/ia64/include/asm/signal.h
View File

@ -26,16 +26,6 @@ typedef struct {
unsigned long sig[_NSIG_WORDS];
} sigset_t;
struct sigaction {
__sighandler_t sa_handler;
unsigned long sa_flags;
sigset_t sa_mask; /* mask last for extensibility */
};
struct k_sigaction {
struct sigaction sa;
};
# include <asm/sigcontext.h>
# endif /* !__ASSEMBLY__ */

8
arch/ia64/include/asm/unistd.h
View File

@ -27,9 +27,6 @@
#define __IGNORE_vfork /* clone() */
#define __IGNORE_umount2 /* umount() */
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#if !defined(__ASSEMBLY__) && !defined(ASSEMBLER)
#include <linux/types.h>
@ -47,12 +44,7 @@ asmlinkage unsigned long sys_mmap2(
int prot, int flags,
int fd, long pgoff);
struct pt_regs;
struct sigaction;
asmlinkage long sys_ia64_pipe(void);
asmlinkage long sys_rt_sigaction(int sig,
const struct sigaction __user *act,
struct sigaction __user *oact,
size_t sigsetsize);
/*
* "Conditional" syscalls

19
arch/ia64/kernel/signal.c
View File

@ -39,14 +39,6 @@
# define GET_SIGSET(k,u) __get_user((k)->sig[0], &(u)->sig[0])
#endif
asmlinkage long
sys_sigaltstack (const stack_t __user *uss, stack_t __user *uoss, long arg2,
long arg3, long arg4, long arg5, long arg6, long arg7,
struct pt_regs regs)
{
return do_sigaltstack(uss, uoss, regs.r12);
}
static long
restore_sigcontext (struct sigcontext __user *sc, struct sigscratch *scr)
{
@ -208,11 +200,8 @@ ia64_rt_sigreturn (struct sigscratch *scr)
printk("SIG return (%s:%d): sp=%lx ip=%lx\n",
current->comm, current->pid, scr->pt.r12, scr->pt.cr_iip);
#endif
/*
* It is more difficult to avoid calling this function than to
* call it and ignore errors.
*/
do_sigaltstack(&sc->sc_stack, NULL, scr->pt.r12);
if (restore_altstack(&sc->sc_stack))
goto give_sigsegv;
return retval;
give_sigsegv:
@ -376,9 +365,7 @@ setup_frame (int sig, struct k_sigaction *ka, siginfo_t *info, sigset_t *set,
err |= copy_siginfo_to_user(&frame->info, info);
err |= __put_user(current->sas_ss_sp, &frame->sc.sc_stack.ss_sp);
err |= __put_user(current->sas_ss_size, &frame->sc.sc_stack.ss_size);
err |= __put_user(sas_ss_flags(scr->pt.r12), &frame->sc.sc_stack.ss_flags);
err |= __save_altstack(&frame->sc.sc_stack, scr->pt.r12);
err |= setup_sigcontext(&frame->sc, set, scr);
if (unlikely(err))

11
arch/m32r/include/asm/signal.h
View File

@ -16,16 +16,7 @@ typedef struct {
unsigned long sig[_NSIG_WORDS];
} sigset_t;
struct sigaction {
__sighandler_t sa_handler;
unsigned long sa_flags;
__sigrestore_t sa_restorer;
sigset_t sa_mask; /* mask last for extensibility */
};
struct k_sigaction {
struct sigaction sa;
};
#define __ARCH_HAS_SA_RESTORER
#include <asm/sigcontext.h>
#undef __HAVE_ARCH_SIG_BITOPS

2
arch/m32r/include/asm/unistd.h
View File

@ -20,8 +20,6 @@
#define __ARCH_WANT_SYS_LLSEEK
#define __ARCH_WANT_SYS_OLD_GETRLIMIT /*will be unused*/
#define __ARCH_WANT_SYS_OLDUMOUNT
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_SYS_CLONE
#define __ARCH_WANT_SYS_FORK
#define __ARCH_WANT_SYS_VFORK

16
arch/m32r/kernel/signal.c
View File

@ -27,15 +27,6 @@
#define DEBUG_SIG 0
asmlinkage int
sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
unsigned long r2, unsigned long r3, unsigned long r4,
unsigned long r5, unsigned long r6, struct pt_regs *regs)
{
return do_sigaltstack(uss, uoss, regs->spu);
}
/*
* Do a signal return; undo the signal stack.
*/
@ -113,7 +104,7 @@ sys_rt_sigreturn(unsigned long r0, unsigned long r1,
if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &result))
goto badframe;
if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->spu) == -EFAULT)
if (restore_altstack(&frame->uc.uc_stack))
goto badframe;
return result;
@ -213,10 +204,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
/* Create the ucontext. */
err |= __put_user(0, &frame->uc.uc_flags);
err |= __put_user(0, &frame->uc.uc_link);
err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
err |= __put_user(sas_ss_flags(regs->spu),
&frame->uc.uc_stack.ss_flags);
err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
err |= __save_altstack(&frame->uc.uc_stack, regs->spu);
err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, set->sig[0]);
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
if (err)

2
arch/m68k/Kconfig
View File

@ -18,6 +18,8 @@ config M68K
select HAVE_MOD_ARCH_SPECIFIC
select MODULES_USE_ELF_REL
select MODULES_USE_ELF_RELA
select OLD_SIGSUSPEND3
select OLD_SIGACTION
config RWSEM_GENERIC_SPINLOCK
bool

17
arch/m68k/include/asm/signal.h
View File

@ -16,23 +16,8 @@ typedef struct {
unsigned long sig[_NSIG_WORDS];
} sigset_t;
struct old_sigaction {
__sighandler_t sa_handler;
old_sigset_t sa_mask;
unsigned long sa_flags;
__sigrestore_t sa_restorer;
};
#define __ARCH_HAS_SA_RESTORER
struct sigaction {
__sighandler_t sa_handler;
unsigned long sa_flags;
__sigrestore_t sa_restorer;
sigset_t sa_mask; /* mask last for extensibility */
};
struct k_sigaction {
struct sigaction sa;
};
#include <asm/sigcontext.h>
#ifndef CONFIG_CPU_HAS_NO_BITFIELDS

2
arch/m68k/include/asm/unistd.h
View File

@ -29,8 +29,6 @@
#define __ARCH_WANT_SYS_OLDUMOUNT
#define __ARCH_WANT_SYS_SIGPENDING
#define __ARCH_WANT_SYS_SIGPROCMASK
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_SYS_FORK
#define __ARCH_WANT_SYS_VFORK

59
arch/m68k/kernel/signal.c
View File

@ -224,56 +224,6 @@ static inline void push_cache(unsigned long vaddr)
#endif /* CONFIG_MMU */
/*
* Atomically swap in the new signal mask, and wait for a signal.
*/
asmlinkage int
sys_sigsuspend(int unused0, int unused1, old_sigset_t mask)
{
sigset_t blocked;
siginitset(&blocked, mask);
return sigsuspend(&blocked);
}
asmlinkage int
sys_sigaction(int sig, const struct old_sigaction __user *act,
struct old_sigaction __user *oact)
{
struct k_sigaction new_ka, old_ka;
int ret;
if (act) {
old_sigset_t mask;
if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
__get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
__get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
__get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
__get_user(mask, &act->sa_mask))
return -EFAULT;
siginitset(&new_ka.sa.sa_mask, mask);
}
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
if (!ret && oact) {
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
__put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
__put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
__put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
__put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
return -EFAULT;
}
return ret;
}
asmlinkage int
sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
{
return do_sigaltstack(uss, uoss, rdusp());
}
/*
* Do a signal return; undo the signal stack.
*
@ -765,8 +715,9 @@ rt_restore_ucontext(struct pt_regs *regs, struct switch_stack *sw,
err |= __get_user(temp, &uc->uc_formatvec);
err |= rt_restore_fpu_state(uc);
err |= restore_altstack(&uc->uc_stack);
if (err || do_sigaltstack(&uc->uc_stack, NULL, usp) == -EFAULT)
if (err)
goto badframe;
if (mangle_kernel_stack(regs, temp, &uc->uc_extra))
@ -1014,11 +965,7 @@ static int setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info,
/* Create the ucontext. */
err |= __put_user(0, &frame->uc.uc_flags);
err |= __put_user(NULL, &frame->uc.uc_link);
err |= __put_user((void __user *)current->sas_ss_sp,
&frame->uc.uc_stack.ss_sp);
err |= __put_user(sas_ss_flags(rdusp()),
&frame->uc.uc_stack.ss_flags);
err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
err |= __save_altstack(&frame->uc.uc_stack, rdusp());
err |= rt_setup_ucontext(&frame->uc, regs);
err |= copy_to_user (&frame->uc.uc_sigmask, set, sizeof(*set));

2
arch/microblaze/include/asm/unistd.h
View File

@ -33,8 +33,6 @@
#define __ARCH_WANT_SYS_OLDUMOUNT
#define __ARCH_WANT_SYS_SIGPENDING
#define __ARCH_WANT_SYS_SIGPROCMASK
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_SYS_CLONE
#define __ARCH_WANT_SYS_VFORK
#define __ARCH_WANT_SYS_FORK

21
arch/microblaze/kernel/entry-nommu.S
View File

@ -124,6 +124,7 @@ ret_from_intr:
lwi r11, r1, PT_MODE
bneid r11, no_intr_resched
3:
lwi r6, r31, TS_THREAD_INFO /* get thread info */
lwi r19, r6, TI_FLAGS /* get flags in thread info */
/* do an extra work if any bits are set */
@ -132,11 +133,13 @@ ret_from_intr:
beqi r11, 1f
bralid r15, schedule
nop
bri 3b
1: andi r11, r19, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME
beqid r11, no_intr_resched
addk r5, r1, r0
bralid r15, do_notify_resume
addk r6, r0, r0
bri 3b
no_intr_resched:
/* Disable interrupts, we are now committed to the state restore */
@ -280,6 +283,7 @@ ENTRY(_user_exception)
/* Figure out which function to use for this system call. */
/* Note Microblaze barrel shift is optional, so don't rely on it */
add r12, r12, r12 /* convert num -> ptr */
addik r30, r0, 1 /* restarts allowed */
add r12, r12, r12
lwi r12, r12, sys_call_table /* Get function pointer */
addik r15, r0, ret_to_user-8 /* set return address */
@ -369,6 +373,7 @@ ENTRY(_debug_exception)
bralid r15, send_sig
add r7, r0, r0 /* 3rd param zero */
addik r30, r0, 1 /* restarts allowed ??? */
/* Restore r3/r4 to work around how ret_to_user works */
lwi r3, r1, PT_R3
lwi r4, r1, PT_R4
@ -482,18 +487,26 @@ ENTRY(ret_from_kernel_thread)
addk r3, r0, r0
work_pending:
lwi r11, r1, PT_MODE
bneid r11, 2f
3:
enable_irq
andi r11, r19, _TIF_NEED_RESCHED
beqi r11, 1f
bralid r15, schedule
nop
bri 4f
1: andi r11, r19, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME
beqi r11, no_work_pending
addk r5, r1, r0
addk r5, r30, r0
bralid r15, do_notify_resume
addik r6, r0, 1
bri no_work_pending
addk r30, r0, r0 /* no restarts from now on */
4:
disable_irq
lwi r6, r31, TS_THREAD_INFO /* get thread info */
lwi r19, r6, TI_FLAGS /* get flags in thread info */
bri 3b
ENTRY(ret_to_user)
disable_irq
@ -507,6 +520,7 @@ ENTRY(ret_to_user)
no_work_pending:
disable_irq
2:
/* save r31 */
swi r31, r0, PER_CPU(CURRENT_SAVE)
/* save mode indicator */
@ -559,6 +573,7 @@ no_work_pending:
nop
sys_rt_sigreturn_wrapper:
addk r30, r0, r0 /* no restarts for this one */
brid sys_rt_sigreturn
addk r5, r1, r0

62
arch/microblaze/kernel/entry.S
View File

@ -354,6 +354,7 @@ C_ENTRY(_user_exception):
/* Note Microblaze barrel shift is optional, so don't rely on it */
add r12, r12, r12; /* convert num -> ptr */
add r12, r12, r12;
addi r30, r0, 1 /* restarts allowed */
#ifdef DEBUG
/* Trac syscalls and stored them to syscall_debug_table */
@ -401,26 +402,27 @@ C_ENTRY(ret_from_trap):
* trigger rescheduling. */
/* get thread info from current task */
lwi r11, CURRENT_TASK, TS_THREAD_INFO;
lwi r11, r11, TI_FLAGS; /* get flags in thread info */
andi r11, r11, _TIF_NEED_RESCHED;
lwi r19, r11, TI_FLAGS; /* get flags in thread info */
andi r11, r19, _TIF_NEED_RESCHED;
beqi r11, 5f;
bralid r15, schedule; /* Call scheduler */
nop; /* delay slot */
bri 1b
/* Maybe handle a signal */
5: /* get thread info from current task*/
lwi r11, CURRENT_TASK, TS_THREAD_INFO;
lwi r11, r11, TI_FLAGS; /* get flags in thread info */
andi r11, r11, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME;
beqi r11, 1f; /* Signals to handle, handle them */
5:
andi r11, r19, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME;
beqi r11, 4f; /* Signals to handle, handle them */
addik r5, r1, 0; /* Arg 1: struct pt_regs *regs */
bralid r15, do_notify_resume; /* Handle any signals */
addi r6, r0, 1; /* Arg 2: int in_syscall */
add r6, r30, r0; /* Arg 2: int in_syscall */
add r30, r0, r0 /* no more restarts */
bri 1b
/* Finally, return to user state. */
1: set_bip; /* Ints masked for state restore */
4: set_bip; /* Ints masked for state restore */
swi CURRENT_TASK, r0, PER_CPU(CURRENT_SAVE); /* save current */
VM_OFF;
tophys(r1,r1);
@ -464,6 +466,7 @@ C_ENTRY(ret_from_kernel_thread):
add r3, r0, r0
C_ENTRY(sys_rt_sigreturn_wrapper):
addik r30, r0, 0 /* no restarts */
brid sys_rt_sigreturn /* Do real work */
addik r5, r1, 0; /* add user context as 1st arg */
@ -571,20 +574,20 @@ C_ENTRY(ret_from_exc):
/* We're returning to user mode, so check for various conditions that
trigger rescheduling. */
1:
lwi r11, CURRENT_TASK, TS_THREAD_INFO; /* get thread info */
lwi r11, r11, TI_FLAGS; /* get flags in thread info */
andi r11, r11, _TIF_NEED_RESCHED;
lwi r19, r11, TI_FLAGS; /* get flags in thread info */
andi r11, r19, _TIF_NEED_RESCHED;
beqi r11, 5f;
/* Call the scheduler before returning from a syscall/trap. */
bralid r15, schedule; /* Call scheduler */
nop; /* delay slot */
bri 1b
/* Maybe handle a signal */
5: lwi r11, CURRENT_TASK, TS_THREAD_INFO; /* get thread info */
lwi r11, r11, TI_FLAGS; /* get flags in thread info */
andi r11, r11, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME;
beqi r11, 1f; /* Signals to handle, handle them */
5: andi r11, r19, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME;
beqi r11, 4f; /* Signals to handle, handle them */
/*
* Handle a signal return; Pending signals should be in r18.
@ -600,9 +603,10 @@ C_ENTRY(ret_from_exc):
addik r5, r1, 0; /* Arg 1: struct pt_regs *regs */
bralid r15, do_notify_resume; /* Handle any signals */
addi r6, r0, 0; /* Arg 2: int in_syscall */
bri 1b
/* Finally, return to user state. */
1: set_bip; /* Ints masked for state restore */
4: set_bip; /* Ints masked for state restore */
swi CURRENT_TASK, r0, PER_CPU(CURRENT_SAVE); /* save current */
VM_OFF;
tophys(r1,r1);
@ -682,22 +686,23 @@ ret_from_irq:
lwi r11, r1, PT_MODE;
bnei r11, 2f;
1:
lwi r11, CURRENT_TASK, TS_THREAD_INFO;
lwi r11, r11, TI_FLAGS; /* MS: get flags from thread info */
andi r11, r11, _TIF_NEED_RESCHED;
lwi r19, r11, TI_FLAGS; /* MS: get flags from thread info */
andi r11, r19, _TIF_NEED_RESCHED;
beqi r11, 5f
bralid r15, schedule;
nop; /* delay slot */
bri 1b
/* Maybe handle a signal */
5: lwi r11, CURRENT_TASK, TS_THREAD_INFO; /* MS: get thread info */
lwi r11, r11, TI_FLAGS; /* get flags in thread info */
andi r11, r11, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME;
5: andi r11, r19, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME;
beqid r11, no_intr_resched
/* Handle a signal return; Pending signals should be in r18. */
addik r5, r1, 0; /* Arg 1: struct pt_regs *regs */
bralid r15, do_notify_resume; /* Handle any signals */
addi r6, r0, 0; /* Arg 2: int in_syscall */
bri 1b
/* Finally, return to user state. */
no_intr_resched:
@ -815,28 +820,29 @@ dbtrap_call: /* Return point for kernel/user entry + 8 because of rtsd r15, 8 */
lwi r11, r1, PT_MODE;
bnei r11, 2f;
/* MS: Return to user space - gdb */
1:
/* Get current task ptr into r11 */
lwi r11, CURRENT_TASK, TS_THREAD_INFO; /* get thread info */
lwi r11, r11, TI_FLAGS; /* get flags in thread info */
andi r11, r11, _TIF_NEED_RESCHED;
lwi r19, r11, TI_FLAGS; /* get flags in thread info */
andi r11, r19, _TIF_NEED_RESCHED;
beqi r11, 5f;
/* Call the scheduler before returning from a syscall/trap. */
bralid r15, schedule; /* Call scheduler */
nop; /* delay slot */
bri 1b
/* Maybe handle a signal */
5: lwi r11, CURRENT_TASK, TS_THREAD_INFO; /* get thread info */
lwi r11, r11, TI_FLAGS; /* get flags in thread info */
andi r11, r11, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME;
beqi r11, 1f; /* Signals to handle, handle them */
5: andi r11, r19, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME;
beqi r11, 4f; /* Signals to handle, handle them */
addik r5, r1, 0; /* Arg 1: struct pt_regs *regs */
bralid r15, do_notify_resume; /* Handle any signals */
addi r6, r0, 0; /* Arg 2: int in_syscall */
bri 1b
/* Finally, return to user state. */
1: swi CURRENT_TASK, r0, PER_CPU(CURRENT_SAVE); /* save current */
4: swi CURRENT_TASK, r0, PER_CPU(CURRENT_SAVE); /* save current */
VM_OFF;
tophys(r1,r1);
/* MS: Restore all regs */

23
arch/microblaze/kernel/ptrace.c
View File

@ -164,29 +164,6 @@ asmlinkage void do_syscall_trace_leave(struct pt_regs *regs)
tracehook_report_syscall_exit(regs, step);
}
#if 0
static asmlinkage void syscall_trace(void)
{
if (!test_thread_flag(TIF_SYSCALL_TRACE))
return;
if (!(current->ptrace & PT_PTRACED))
return;
/* The 0x80 provides a way for the tracing parent to distinguish
between a syscall stop and SIGTRAP delivery */
ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
? 0x80 : 0));
/*
* this isn't the same as continuing with a signal, but it will do
* for normal use. strace only continues with a signal if the
* stopping signal is not SIGTRAP. -brl
*/
if (current->exit_code) {
send_sig(current->exit_code, current, 1);
current->exit_code = 0;
}
}
#endif
void ptrace_disable(struct task_struct *child)
{
/* nothing to do */

26
arch/microblaze/kernel/signal.c
View File

@ -41,13 +41,6 @@
#include <asm/cacheflush.h>
#include <asm/syscalls.h>
asmlinkage long
sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
struct pt_regs *regs)
{
return do_sigaltstack(uss, uoss, regs->r1);
}
/*
* Do a signal return; undo the signal stack.
*/
@ -109,9 +102,7 @@ asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &rval))
goto badframe;
/* It is more difficult to avoid calling this function than to
call it and ignore errors. */
if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->r1) == -EFAULT)
if (restore_altstack(&frame->uc.uc_stack))
goto badframe;
return rval;
@ -194,11 +185,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
/* Create the ucontext. */
err |= __put_user(0, &frame->uc.uc_flags);
err |= __put_user(NULL, &frame->uc.uc_link);
err |= __put_user((void __user *)current->sas_ss_sp,
&frame->uc.uc_stack.ss_sp);
err |= __put_user(sas_ss_flags(regs->r1),
&frame->uc.uc_stack.ss_flags);
err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
err |= __save_altstack(&frame->uc.uc_stack, regs->r1);
err |= setup_sigcontext(&frame->uc.uc_mcontext,
regs, set->sig[0]);
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
@ -356,15 +343,6 @@ static void do_signal(struct pt_regs *regs, int in_syscall)
asmlinkage void do_notify_resume(struct pt_regs *regs, int in_syscall)
{
/*
* We want the common case to go fast, which
* is why we may in certain cases get here from
* kernel mode. Just return without doing anything
* if so.
*/
if (kernel_mode(regs))
return;
if (test_thread_flag(TIF_SIGPENDING))
do_signal(regs, in_syscall);

1
arch/mips/Kconfig
View File

@ -40,6 +40,7 @@ config MIPS
select HAVE_MOD_ARCH_SPECIFIC
select MODULES_USE_ELF_REL if MODULES
select MODULES_USE_ELF_RELA if MODULES && 64BIT
select CLONE_BACKWARDS
menu "Machine selection"

8
arch/mips/include/asm/compat.h
View File

@ -288,6 +288,14 @@ struct compat_shmid64_ds {
compat_ulong_t __unused2;
};
/* MIPS has unusual order of fields in stack_t */
typedef struct compat_sigaltstack {
compat_uptr_t ss_sp;
compat_size_t ss_size;
int ss_flags;
} compat_stack_t;
#define compat_sigaltstack compat_sigaltstack
static inline int is_compat_task(void)
{
return test_thread_flag(TIF_32BIT_ADDR);

2
arch/mips/include/asm/signal.h
View File

@ -21,4 +21,6 @@
#include <asm/sigcontext.h>
#include <asm/siginfo.h>
#define __ARCH_HAS_ODD_SIGACTION
#endif /* _ASM_SIGNAL_H */

24
arch/mips/include/asm/sim.h
View File

@ -20,10 +20,10 @@
#define save_static_function(symbol) \
__asm__( \
".text\n\t" \
".globl\t" #symbol "\n\t" \
".globl\t__" #symbol "\n\t" \
".align\t2\n\t" \
".type\t" #symbol ", @function\n\t" \
".ent\t" #symbol ", 0\n" \
".type\t__" #symbol ", @function\n\t" \
".ent\t__" #symbol ", 0\n__" \
#symbol":\n\t" \
".frame\t$29, 0, $31\n\t" \
"sw\t$16,"__str(PT_R16)"($29)\t\t\t# save_static_function\n\t" \
@ -35,9 +35,9 @@ __asm__( \
"sw\t$22,"__str(PT_R22)"($29)\n\t" \
"sw\t$23,"__str(PT_R23)"($29)\n\t" \
"sw\t$30,"__str(PT_R30)"($29)\n\t" \
"j\t_" #symbol "\n\t" \
".end\t" #symbol "\n\t" \
".size\t" #symbol",. - " #symbol)
"j\t" #symbol "\n\t" \
".end\t__" #symbol "\n\t" \
".size\t__" #symbol",. - __" #symbol)
#define nabi_no_regargs
@ -48,10 +48,10 @@ __asm__( \
#define save_static_function(symbol) \
__asm__( \
".text\n\t" \
".globl\t" #symbol "\n\t" \
".globl\t__" #symbol "\n\t" \
".align\t2\n\t" \
".type\t" #symbol ", @function\n\t" \
".ent\t" #symbol ", 0\n" \
".type\t__" #symbol ", @function\n\t" \
".ent\t__" #symbol ", 0\n__" \
#symbol":\n\t" \
".frame\t$29, 0, $31\n\t" \
"sd\t$16,"__str(PT_R16)"($29)\t\t\t# save_static_function\n\t" \
@ -63,9 +63,9 @@ __asm__( \
"sd\t$22,"__str(PT_R22)"($29)\n\t" \
"sd\t$23,"__str(PT_R23)"($29)\n\t" \
"sd\t$30,"__str(PT_R30)"($29)\n\t" \
"j\t_" #symbol "\n\t" \
".end\t" #symbol "\n\t" \
".size\t" #symbol",. - " #symbol)
"j\t" #symbol "\n\t" \
".end\t__" #symbol "\n\t" \
".size\t__" #symbol",. - __" #symbol)
#define nabi_no_regargs \
unsigned long __dummy0, \

3
arch/mips/include/asm/unistd.h
View File

@ -35,7 +35,6 @@
#define __ARCH_WANT_SYS_OLDUMOUNT
#define __ARCH_WANT_SYS_SIGPENDING
#define __ARCH_WANT_SYS_SIGPROCMASK
#define __ARCH_WANT_SYS_RT_SIGACTION
# ifdef CONFIG_32BIT
# define __ARCH_WANT_STAT64
# define __ARCH_WANT_SYS_TIME
@ -43,6 +42,8 @@
# ifdef CONFIG_MIPS32_O32
# define __ARCH_WANT_COMPAT_SYS_TIME
# endif
#define __ARCH_WANT_SYS_FORK
#define __ARCH_WANT_SYS_CLONE
/* whitelists for checksyscalls */
#define __IGNORE_select

6
arch/mips/include/uapi/asm/signal.h
View File

@ -96,15 +96,13 @@ typedef unsigned long old_sigset_t; /* at least 32 bits */
#include <asm-generic/signal-defs.h>
#ifndef __KERNEL__
struct sigaction {
unsigned int sa_flags;
__sighandler_t sa_handler;
sigset_t sa_mask;
};
struct k_sigaction {
struct sigaction sa;
};
#endif
/* IRIX compatible stack_t */
typedef struct sigaltstack {

44
arch/mips/kernel/linux32.c
View File

@ -119,22 +119,6 @@ SYSCALL_DEFINE6(32_pwrite, unsigned int, fd, const char __user *, buf,
return sys_pwrite64(fd, buf, count, merge_64(a4, a5));
}
SYSCALL_DEFINE2(32_sched_rr_get_interval, compat_pid_t, pid,
struct compat_timespec __user *, interval)
{
struct timespec t;
int ret;
mm_segment_t old_fs = get_fs();
set_fs(KERNEL_DS);
ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
set_fs(old_fs);
if (put_user (t.tv_sec, &interval->tv_sec) ||
__put_user(t.tv_nsec, &interval->tv_nsec))
return -EFAULT;
return ret;
}
#ifdef CONFIG_SYSVIPC
SYSCALL_DEFINE6(32_ipc, u32, call, long, first, long, second, long, third,
@ -295,27 +279,6 @@ asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2,
merge_64(len_a4, len_a5));
}
save_static_function(sys32_clone);
static int noinline __used
_sys32_clone(nabi_no_regargs struct pt_regs regs)
{
unsigned long clone_flags;
unsigned long newsp;
int __user *parent_tidptr, *child_tidptr;
clone_flags = regs.regs[4];
newsp = regs.regs[5];
if (!newsp)
newsp = regs.regs[29];
parent_tidptr = (int __user *) regs.regs[6];
/* Use __dummy4 instead of getting it off the stack, so that
syscall() works. */
child_tidptr = (int __user *) __dummy4;
return do_fork(clone_flags, newsp, 0,
parent_tidptr, child_tidptr);
}
asmlinkage long sys32_lookup_dcookie(u32 a0, u32 a1, char __user *buf,
size_t len)
{
@ -328,10 +291,3 @@ SYSCALL_DEFINE6(32_fanotify_mark, int, fanotify_fd, unsigned int, flags,
return sys_fanotify_mark(fanotify_fd, flags, merge_64(a3, a4),
dfd, pathname);
}
SYSCALL_DEFINE6(32_futex, u32 __user *, uaddr, int, op, u32, val,
struct compat_timespec __user *, utime, u32 __user *, uaddr2,
u32, val3)
{
return compat_sys_futex(uaddr, op, val, utime, uaddr2, val3);
}

3
arch/mips/kernel/process.c
View File

@ -156,7 +156,8 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
*childregs = *regs;
childregs->regs[7] = 0; /* Clear error flag */
childregs->regs[2] = 0; /* Child gets zero as return value */
childregs->regs[29] = usp;
if (usp)
childregs->regs[29] = usp;
ti->addr_limit = USER_DS;
p->thread.reg29 = (unsigned long) childregs;

4
arch/mips/kernel/scall32-o32.S
View File

@ -226,7 +226,7 @@ einval: li v0, -ENOSYS
.macro syscalltable
sys sys_syscall 8 /* 4000 */
sys sys_exit 1
sys sys_fork 0
sys __sys_fork 0
sys sys_read 3
sys sys_write 3
sys sys_open 3 /* 4005 */
@ -344,7 +344,7 @@ einval: li v0, -ENOSYS
sys sys_ipc 6
sys sys_fsync 1
sys sys_sigreturn 0
sys sys_clone 0 /* 4120 */
sys __sys_clone 6 /* 4120 */
sys sys_setdomainname 2
sys sys_newuname 1
sys sys_ni_syscall 0 /* sys_modify_ldt */

4
arch/mips/kernel/scall64-64.S
View File

@ -170,8 +170,8 @@ sys_call_table:
PTR sys_socketpair
PTR sys_setsockopt
PTR sys_getsockopt
PTR sys_clone /* 5055 */
PTR sys_fork
PTR __sys_clone /* 5055 */
PTR __sys_fork
PTR sys_execve
PTR sys_exit
PTR sys_wait4

20
arch/mips/kernel/scall64-n32.S
View File

@ -117,8 +117,8 @@ EXPORT(sysn32_call_table)
PTR sys_mprotect /* 6010 */
PTR sys_munmap
PTR sys_brk
PTR sys_32_rt_sigaction
PTR sys_32_rt_sigprocmask
PTR compat_sys_rt_sigaction
PTR compat_sys_rt_sigprocmask
PTR compat_sys_ioctl /* 6015 */
PTR sys_pread64
PTR sys_pwrite64
@ -159,8 +159,8 @@ EXPORT(sysn32_call_table)
PTR sys_socketpair
PTR compat_sys_setsockopt
PTR sys_getsockopt
PTR sys_clone /* 6055 */
PTR sys_fork
PTR __sys_clone /* 6055 */
PTR __sys_fork
PTR compat_sys_execve
PTR sys_exit
PTR compat_sys_wait4
@ -229,11 +229,11 @@ EXPORT(sysn32_call_table)
PTR sys_getsid
PTR sys_capget
PTR sys_capset
PTR sys_32_rt_sigpending /* 6125 */
PTR compat_sys_rt_sigpending /* 6125 */
PTR compat_sys_rt_sigtimedwait
PTR sys_32_rt_sigqueueinfo
PTR sysn32_rt_sigsuspend
PTR sys32_sigaltstack
PTR compat_sys_rt_sigqueueinfo
PTR compat_sys_rt_sigsuspend
PTR compat_sys_sigaltstack
PTR compat_sys_utime /* 6130 */
PTR sys_mknod
PTR sys_32_personality
@ -249,7 +249,7 @@ EXPORT(sysn32_call_table)
PTR sys_sched_getscheduler
PTR sys_sched_get_priority_max
PTR sys_sched_get_priority_min
PTR sys_32_sched_rr_get_interval /* 6145 */
PTR compat_sys_sched_rr_get_interval /* 6145 */
PTR sys_mlock
PTR sys_munlock
PTR sys_mlockall
@ -298,7 +298,7 @@ EXPORT(sysn32_call_table)
PTR sys_fremovexattr
PTR sys_tkill
PTR sys_ni_syscall
PTR sys_32_futex
PTR compat_sys_futex
PTR compat_sys_sched_setaffinity /* 6195 */
PTR compat_sys_sched_getaffinity
PTR sys_cacheflush

22
arch/mips/kernel/scall64-o32.S
View File

@ -194,7 +194,7 @@ einval: li v0, -ENOSYS
sys_call_table:
PTR sys32_syscall /* 4000 */
PTR sys_exit
PTR sys_fork
PTR __sys_fork
PTR sys_read
PTR sys_write
PTR compat_sys_open /* 4005 */
@ -312,7 +312,7 @@ sys_call_table:
PTR sys_32_ipc
PTR sys_fsync
PTR sys32_sigreturn
PTR sys32_clone /* 4120 */
PTR __sys_clone /* 4120 */
PTR sys_setdomainname
PTR sys_newuname
PTR sys_ni_syscall /* sys_modify_ldt */
@ -357,7 +357,7 @@ sys_call_table:
PTR sys_sched_yield
PTR sys_sched_get_priority_max
PTR sys_sched_get_priority_min
PTR sys_32_sched_rr_get_interval /* 4165 */
PTR compat_sys_sched_rr_get_interval /* 4165 */
PTR compat_sys_nanosleep
PTR sys_mremap
PTR sys_accept
@ -386,19 +386,19 @@ sys_call_table:
PTR sys_getresgid
PTR sys_prctl
PTR sys32_rt_sigreturn
PTR sys_32_rt_sigaction
PTR sys_32_rt_sigprocmask /* 4195 */
PTR sys_32_rt_sigpending
PTR compat_sys_rt_sigaction
PTR compat_sys_rt_sigprocmask /* 4195 */
PTR compat_sys_rt_sigpending
PTR compat_sys_rt_sigtimedwait
PTR sys_32_rt_sigqueueinfo
PTR sys32_rt_sigsuspend
PTR compat_sys_rt_sigqueueinfo
PTR compat_sys_rt_sigsuspend
PTR sys_32_pread /* 4200 */
PTR sys_32_pwrite
PTR sys_chown
PTR sys_getcwd
PTR sys_capget
PTR sys_capset /* 4205 */
PTR sys32_sigaltstack
PTR compat_sys_sigaltstack
PTR sys_32_sendfile
PTR sys_ni_syscall
PTR sys_ni_syscall
@ -430,7 +430,7 @@ sys_call_table:
PTR sys_fremovexattr /* 4235 */
PTR sys_tkill
PTR sys_sendfile64
PTR sys_32_futex
PTR compat_sys_futex
PTR compat_sys_sched_setaffinity
PTR compat_sys_sched_getaffinity /* 4240 */
PTR compat_sys_io_setup
@ -470,7 +470,7 @@ sys_call_table:
PTR compat_sys_mq_notify /* 4275 */
PTR compat_sys_mq_getsetattr
PTR sys_ni_syscall /* sys_vserver */
PTR sys_32_waitid
PTR compat_sys_waitid
PTR sys_ni_syscall /* available, was setaltroot */
PTR sys_add_key /* 4280 */
PTR sys_request_key

48
arch/mips/kernel/signal.c
View File

@ -247,35 +247,12 @@ void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
*/
#ifdef CONFIG_TRAD_SIGNALS
asmlinkage int sys_sigsuspend(nabi_no_regargs struct pt_regs regs)
SYSCALL_DEFINE1(sigsuspend, sigset_t __user *, uset)
{
sigset_t newset;
sigset_t __user *uset;
uset = (sigset_t __user *) regs.regs[4];
if (copy_from_user(&newset, uset, sizeof(sigset_t)))
return -EFAULT;
return sigsuspend(&newset);
return sys_rt_sigsuspend(uset, sizeof(sigset_t));
}
#endif
asmlinkage int sys_rt_sigsuspend(nabi_no_regargs struct pt_regs regs)
{
sigset_t newset;
sigset_t __user *unewset;
size_t sigsetsize;
/* XXX Don't preclude handling different sized sigset_t's. */
sigsetsize = regs.regs[5];
if (sigsetsize != sizeof(sigset_t))
return -EINVAL;
unewset = (sigset_t __user *) regs.regs[4];
if (copy_from_user(&newset, unewset, sizeof(newset)))
return -EFAULT;
return sigsuspend(&newset);
}
#ifdef CONFIG_TRAD_SIGNALS
SYSCALL_DEFINE3(sigaction, int, sig, const struct sigaction __user *, act,
struct sigaction __user *, oact)
@ -317,15 +294,6 @@ SYSCALL_DEFINE3(sigaction, int, sig, const struct sigaction __user *, act,
}
#endif
asmlinkage int sys_sigaltstack(nabi_no_regargs struct pt_regs regs)
{
const stack_t __user *uss = (const stack_t __user *) regs.regs[4];
stack_t __user *uoss = (stack_t __user *) regs.regs[5];
unsigned long usp = regs.regs[29];
return do_sigaltstack(uss, uoss, usp);
}
#ifdef CONFIG_TRAD_SIGNALS
asmlinkage void sys_sigreturn(nabi_no_regargs struct pt_regs regs)
{
@ -382,9 +350,8 @@ asmlinkage void sys_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
else if (sig)
force_sig(sig, current);
/* It is more difficult to avoid calling this function than to
call it and ignore errors. */
do_sigaltstack(&frame->rs_uc.uc_stack, NULL, regs.regs[29]);
if (restore_altstack(&frame->rs_uc.uc_stack))
goto badframe;
/*
* Don't let your children do this ...
@ -461,12 +428,7 @@ static int setup_rt_frame(void *sig_return, struct k_sigaction *ka,
/* Create the ucontext. */
err |= __put_user(0, &frame->rs_uc.uc_flags);
err |= __put_user(NULL, &frame->rs_uc.uc_link);
err |= __put_user((void __user *)current->sas_ss_sp,
&frame->rs_uc.uc_stack.ss_sp);
err |= __put_user(sas_ss_flags(regs->regs[29]),
&frame->rs_uc.uc_stack.ss_flags);
err |= __put_user(current->sas_ss_size,
&frame->rs_uc.uc_stack.ss_size);
err |= __save_altstack(&frame->rs_uc.uc_stack, regs->regs[29]);
err |= setup_sigcontext(regs, &frame->rs_uc.uc_mcontext);
err |= __copy_to_user(&frame->rs_uc.uc_sigmask, set, sizeof(*set));

237
arch/mips/kernel/signal32.c
View File

@ -55,23 +55,10 @@ extern asmlinkage int fpu_emulator_restore_context32(struct sigcontext32 __user
typedef unsigned int __sighandler32_t;
typedef void (*vfptr_t)(void);
struct sigaction32 {
unsigned int sa_flags;
__sighandler32_t sa_handler;
compat_sigset_t sa_mask;
};
/* IRIX compatible stack_t */
typedef struct sigaltstack32 {
s32 ss_sp;
compat_size_t ss_size;
int ss_flags;
} stack32_t;
struct ucontext32 {
u32 uc_flags;
s32 uc_link;
stack32_t uc_stack;
compat_stack_t uc_stack;
struct sigcontext32 uc_mcontext;
compat_sigset_t uc_sigmask; /* mask last for extensibility */
};
@ -280,36 +267,13 @@ static inline int get_sigset(sigset_t *kbuf, const compat_sigset_t __user *ubuf)
* Atomically swap in the new signal mask, and wait for a signal.
*/
asmlinkage int sys32_sigsuspend(nabi_no_regargs struct pt_regs regs)
asmlinkage int sys32_sigsuspend(compat_sigset_t __user *uset)
{
compat_sigset_t __user *uset;
sigset_t newset;
uset = (compat_sigset_t __user *) regs.regs[4];
if (get_sigset(&newset, uset))
return -EFAULT;
return sigsuspend(&newset);
return compat_sys_rt_sigsuspend(uset, sizeof(compat_sigset_t));
}
asmlinkage int sys32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs)
{
compat_sigset_t __user *uset;
sigset_t newset;
size_t sigsetsize;
/* XXX Don't preclude handling different sized sigset_t's. */
sigsetsize = regs.regs[5];
if (sigsetsize != sizeof(compat_sigset_t))
return -EINVAL;
uset = (compat_sigset_t __user *) regs.regs[4];
if (get_sigset(&newset, uset))
return -EFAULT;
return sigsuspend(&newset);
}
SYSCALL_DEFINE3(32_sigaction, long, sig, const struct sigaction32 __user *, act,
struct sigaction32 __user *, oact)
SYSCALL_DEFINE3(32_sigaction, long, sig, const struct compat_sigaction __user *, act,
struct compat_sigaction __user *, oact)
{
struct k_sigaction new_ka, old_ka;
int ret;
@ -350,45 +314,6 @@ SYSCALL_DEFINE3(32_sigaction, long, sig, const struct sigaction32 __user *, act,
return ret;
}
asmlinkage int sys32_sigaltstack(nabi_no_regargs struct pt_regs regs)
{
const stack32_t __user *uss = (const stack32_t __user *) regs.regs[4];
stack32_t __user *uoss = (stack32_t __user *) regs.regs[5];
unsigned long usp = regs.regs[29];
stack_t kss, koss;
int ret, err = 0;
mm_segment_t old_fs = get_fs();
s32 sp;
if (uss) {
if (!access_ok(VERIFY_READ, uss, sizeof(*uss)))
return -EFAULT;
err |= __get_user(sp, &uss->ss_sp);
kss.ss_sp = (void __user *) (long) sp;
err |= __get_user(kss.ss_size, &uss->ss_size);
err |= __get_user(kss.ss_flags, &uss->ss_flags);
if (err)
return -EFAULT;
}
set_fs(KERNEL_DS);
ret = do_sigaltstack(uss ? (stack_t __user *)&kss : NULL,
uoss ? (stack_t __user *)&koss : NULL, usp);
set_fs(old_fs);
if (!ret && uoss) {
if (!access_ok(VERIFY_WRITE, uoss, sizeof(*uoss)))
return -EFAULT;
sp = (int) (unsigned long) koss.ss_sp;
err |= __put_user(sp, &uoss->ss_sp);
err |= __put_user(koss.ss_size, &uoss->ss_size);
err |= __put_user(koss.ss_flags, &uoss->ss_flags);
if (err)
return -EFAULT;
}
return ret;
}
int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
{
int err;
@ -490,10 +415,7 @@ badframe:
asmlinkage void sys32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
{
struct rt_sigframe32 __user *frame;
mm_segment_t old_fs;
sigset_t set;
stack_t st;
s32 sp;
int sig;
frame = (struct rt_sigframe32 __user *) regs.regs[29];
@ -510,21 +432,8 @@ asmlinkage void sys32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
else if (sig)
force_sig(sig, current);
/* The ucontext contains a stack32_t, so we must convert! */
if (__get_user(sp, &frame->rs_uc.uc_stack.ss_sp))
if (compat_restore_altstack(&frame->rs_uc.uc_stack))
goto badframe;
st.ss_sp = (void __user *)(long) sp;
if (__get_user(st.ss_size, &frame->rs_uc.uc_stack.ss_size))
goto badframe;
if (__get_user(st.ss_flags, &frame->rs_uc.uc_stack.ss_flags))
goto badframe;
/* It is more difficult to avoid calling this function than to
call it and ignore errors. */
old_fs = get_fs();
set_fs(KERNEL_DS);
do_sigaltstack((stack_t __user *)&st, NULL, regs.regs[29]);
set_fs(old_fs);
/*
* Don't let your children do this ...
@ -590,7 +499,6 @@ static int setup_rt_frame_32(void *sig_return, struct k_sigaction *ka,
{
struct rt_sigframe32 __user *frame;
int err = 0;
s32 sp;
frame = get_sigframe(ka, regs, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
@ -602,13 +510,7 @@ static int setup_rt_frame_32(void *sig_return, struct k_sigaction *ka,
/* Create the ucontext. */
err |= __put_user(0, &frame->rs_uc.uc_flags);
err |= __put_user(0, &frame->rs_uc.uc_link);
sp = (int) (long) current->sas_ss_sp;
err |= __put_user(sp,
&frame->rs_uc.uc_stack.ss_sp);
err |= __put_user(sas_ss_flags(regs->regs[29]),
&frame->rs_uc.uc_stack.ss_flags);
err |= __put_user(current->sas_ss_size,
&frame->rs_uc.uc_stack.ss_size);
err |= __compat_save_altstack(&frame->rs_uc.uc_stack, regs->regs[29]);
err |= setup_sigcontext32(regs, &frame->rs_uc.uc_mcontext);
err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set);
@ -656,131 +558,6 @@ struct mips_abi mips_abi_32 = {
.restart = __NR_O32_restart_syscall
};
SYSCALL_DEFINE4(32_rt_sigaction, int, sig,
const struct sigaction32 __user *, act,
struct sigaction32 __user *, oact, unsigned int, sigsetsize)
{
struct k_sigaction new_sa, old_sa;
int ret = -EINVAL;
/* XXX: Don't preclude handling different sized sigset_t's. */
if (sigsetsize != sizeof(sigset_t))
goto out;
if (act) {
s32 handler;
int err = 0;
if (!access_ok(VERIFY_READ, act, sizeof(*act)))
return -EFAULT;
err |= __get_user(handler, &act->sa_handler);
new_sa.sa.sa_handler = (void __user *)(s64)handler;
err |= __get_user(new_sa.sa.sa_flags, &act->sa_flags);
err |= get_sigset(&new_sa.sa.sa_mask, &act->sa_mask);
if (err)
return -EFAULT;
}
ret = do_sigaction(sig, act ? &new_sa : NULL, oact ? &old_sa : NULL);
if (!ret && oact) {
int err = 0;
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)))
return -EFAULT;
err |= __put_user((u32)(u64)old_sa.sa.sa_handler,
&oact->sa_handler);
err |= __put_user(old_sa.sa.sa_flags, &oact->sa_flags);
err |= put_sigset(&old_sa.sa.sa_mask, &oact->sa_mask);
if (err)
return -EFAULT;
}
out:
return ret;
}
SYSCALL_DEFINE4(32_rt_sigprocmask, int, how, compat_sigset_t __user *, set,
compat_sigset_t __user *, oset, unsigned int, sigsetsize)
{
sigset_t old_set, new_set;
int ret;
mm_segment_t old_fs = get_fs();
if (set && get_sigset(&new_set, set))
return -EFAULT;
set_fs(KERNEL_DS);
ret = sys_rt_sigprocmask(how, set ? (sigset_t __user *)&new_set : NULL,
oset ? (sigset_t __user *)&old_set : NULL,
sigsetsize);
set_fs(old_fs);
if (!ret && oset && put_sigset(&old_set, oset))
return -EFAULT;
return ret;
}
SYSCALL_DEFINE2(32_rt_sigpending, compat_sigset_t __user *, uset,
unsigned int, sigsetsize)
{
int ret;
sigset_t set;
mm_segment_t old_fs = get_fs();
set_fs(KERNEL_DS);
ret = sys_rt_sigpending((sigset_t __user *)&set, sigsetsize);
set_fs(old_fs);
if (!ret && put_sigset(&set, uset))
return -EFAULT;
return ret;
}
SYSCALL_DEFINE3(32_rt_sigqueueinfo, int, pid, int, sig,
compat_siginfo_t __user *, uinfo)
{
siginfo_t info;
int ret;
mm_segment_t old_fs = get_fs();
if (copy_from_user(&info, uinfo, 3*sizeof(int)) ||
copy_from_user(info._sifields._pad, uinfo->_sifields._pad, SI_PAD_SIZE))
return -EFAULT;
set_fs(KERNEL_DS);
ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *)&info);
set_fs(old_fs);
return ret;
}
SYSCALL_DEFINE5(32_waitid, int, which, compat_pid_t, pid,
compat_siginfo_t __user *, uinfo, int, options,
struct compat_rusage __user *, uru)
{
siginfo_t info;
struct rusage ru;
long ret;
mm_segment_t old_fs = get_fs();
info.si_signo = 0;
set_fs(KERNEL_DS);
ret = sys_waitid(which, pid, (siginfo_t __user *) &info, options,
uru ? (struct rusage __user *) &ru : NULL);
set_fs(old_fs);
if (ret < 0 || info.si_signo == 0)
return ret;
if (uru && (ret = put_compat_rusage(&ru, uru)))
return ret;
BUG_ON(info.si_code & __SI_MASK);
info.si_code |= __SI_CHLD;
return copy_siginfo_to_user32(uinfo, &info);
}
static int signal32_init(void)
{
if (cpu_has_fpu) {

59
arch/mips/kernel/signal_n32.c
View File

@ -50,18 +50,10 @@
extern int setup_sigcontext(struct pt_regs *, struct sigcontext __user *);
extern int restore_sigcontext(struct pt_regs *, struct sigcontext __user *);
/* IRIX compatible stack_t */
typedef struct sigaltstack32 {
s32 ss_sp;
compat_size_t ss_size;
int ss_flags;
} stack32_t;
struct ucontextn32 {
u32 uc_flags;
s32 uc_link;
stack32_t uc_stack;
compat_stack_t uc_stack;
struct sigcontext uc_mcontext;
compat_sigset_t uc_sigmask; /* mask last for extensibility */
};
@ -73,34 +65,10 @@ struct rt_sigframe_n32 {
struct ucontextn32 rs_uc;
};
extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat);
asmlinkage int sysn32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs)
{
compat_sigset_t __user *unewset;
compat_sigset_t uset;
size_t sigsetsize;
sigset_t newset;
/* XXX Don't preclude handling different sized sigset_t's. */
sigsetsize = regs.regs[5];
if (sigsetsize != sizeof(sigset_t))
return -EINVAL;
unewset = (compat_sigset_t __user *) regs.regs[4];
if (copy_from_user(&uset, unewset, sizeof(uset)))
return -EFAULT;
sigset_from_compat(&newset, &uset);
return sigsuspend(&newset);
}
asmlinkage void sysn32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
{
struct rt_sigframe_n32 __user *frame;
mm_segment_t old_fs;
sigset_t set;
stack_t st;
s32 sp;
int sig;
frame = (struct rt_sigframe_n32 __user *) regs.regs[29];
@ -117,22 +85,8 @@ asmlinkage void sysn32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
else if (sig)
force_sig(sig, current);
/* The ucontext contains a stack32_t, so we must convert! */
if (__get_user(sp, &frame->rs_uc.uc_stack.ss_sp))
if (compat_restore_altstack(&frame->rs_uc.uc_stack))
goto badframe;
st.ss_sp = (void __user *)(long) sp;
if (__get_user(st.ss_size, &frame->rs_uc.uc_stack.ss_size))
goto badframe;
if (__get_user(st.ss_flags, &frame->rs_uc.uc_stack.ss_flags))
goto badframe;
/* It is more difficult to avoid calling this function than to
call it and ignore errors. */
old_fs = get_fs();
set_fs(KERNEL_DS);
do_sigaltstack((stack_t __user *)&st, NULL, regs.regs[29]);
set_fs(old_fs);
/*
* Don't let your children do this ...
@ -153,7 +107,6 @@ static int setup_rt_frame_n32(void *sig_return, struct k_sigaction *ka,
{
struct rt_sigframe_n32 __user *frame;
int err = 0;
s32 sp;
frame = get_sigframe(ka, regs, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
@ -165,13 +118,7 @@ static int setup_rt_frame_n32(void *sig_return, struct k_sigaction *ka,
/* Create the ucontext. */
err |= __put_user(0, &frame->rs_uc.uc_flags);
err |= __put_user(0, &frame->rs_uc.uc_link);
sp = (int) (long) current->sas_ss_sp;
err |= __put_user(sp,
&frame->rs_uc.uc_stack.ss_sp);
err |= __put_user(sas_ss_flags(regs->regs[29]),
&frame->rs_uc.uc_stack.ss_flags);
err |= __put_user(current->sas_ss_size,
&frame->rs_uc.uc_stack.ss_size);
err |= __compat_save_altstack(&frame->rs_uc.uc_stack, regs->regs[29]);
err |= setup_sigcontext(regs, &frame->rs_uc.uc_mcontext);
err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set);

73
arch/mips/kernel/syscall.c
View File

@ -46,20 +46,14 @@
* argument. Historically that used to be expensive in Linux. These days
* the performance advantage is negligible.
*/
asmlinkage int sysm_pipe(nabi_no_regargs volatile struct pt_regs regs)
asmlinkage int sysm_pipe(void)
{
int fd[2];
int error, res;
error = do_pipe_flags(fd, 0);
if (error) {
res = error;
goto out;
}
regs.regs[3] = fd[1];
res = fd[0];
out:
return res;
int error = do_pipe_flags(fd, 0);
if (error)
return error;
current_pt_regs()->regs[3] = fd[1];
return fd[0];
}
SYSCALL_DEFINE6(mips_mmap, unsigned long, addr, unsigned long, len,
@ -89,43 +83,7 @@ SYSCALL_DEFINE6(mips_mmap2, unsigned long, addr, unsigned long, len,
}
save_static_function(sys_fork);
static int __used noinline
_sys_fork(nabi_no_regargs struct pt_regs regs)
{
return do_fork(SIGCHLD, regs.regs[29], 0, NULL, NULL);
}
save_static_function(sys_clone);
static int __used noinline
_sys_clone(nabi_no_regargs struct pt_regs regs)
{
unsigned long clone_flags;
unsigned long newsp;
int __user *parent_tidptr, *child_tidptr;
clone_flags = regs.regs[4];
newsp = regs.regs[5];
if (!newsp)
newsp = regs.regs[29];
parent_tidptr = (int __user *) regs.regs[6];
#ifdef CONFIG_32BIT
/* We need to fetch the fifth argument off the stack. */
child_tidptr = NULL;
if (clone_flags & (CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID)) {
int __user *__user *usp = (int __user *__user *) regs.regs[29];
if (regs.regs[2] == __NR_syscall) {
if (get_user (child_tidptr, &usp[5]))
return -EFAULT;
}
else if (get_user (child_tidptr, &usp[4]))
return -EFAULT;
}
#else
child_tidptr = (int __user *) regs.regs[8];
#endif
return do_fork(clone_flags, newsp, 0,
parent_tidptr, child_tidptr);
}
SYSCALL_DEFINE1(set_thread_area, unsigned long, addr)
{
@ -138,10 +96,10 @@ SYSCALL_DEFINE1(set_thread_area, unsigned long, addr)
return 0;
}
static inline int mips_atomic_set(struct pt_regs *regs,
unsigned long addr, unsigned long new)
static inline int mips_atomic_set(unsigned long addr, unsigned long new)
{
unsigned long old, tmp;
struct pt_regs *regs;
unsigned int err;
if (unlikely(addr & 3))
@ -222,6 +180,7 @@ static inline int mips_atomic_set(struct pt_regs *regs,
if (unlikely(err))
return err;
regs = current_pt_regs();
regs->regs[2] = old;
regs->regs[7] = 0; /* No error */
@ -235,22 +194,14 @@ static inline int mips_atomic_set(struct pt_regs *regs,
: "r" (regs));
/* unreached. Honestly. */
while (1);
unreachable();
}
save_static_function(sys_sysmips);
static int __used noinline
_sys_sysmips(nabi_no_regargs struct pt_regs regs)
SYSCALL_DEFINE3(sysmips, long, cmd, long, arg1, long, arg2)
{
long cmd, arg1, arg2;
cmd = regs.regs[4];
arg1 = regs.regs[5];
arg2 = regs.regs[6];
switch (cmd) {
case MIPS_ATOMIC_SET:
return mips_atomic_set(&regs, arg1, arg2);
return mips_atomic_set(arg1, arg2);
case MIPS_FIXADE:
if (arg1 & ~3)

2
arch/mn10300/Kconfig
View File

@ -10,6 +10,8 @@ config MN10300
select HAVE_NMI_WATCHDOG if MN10300_WD_TIMER
select GENERIC_CLOCKEVENTS
select MODULES_USE_ELF_RELA
select OLD_SIGSUSPEND3
select OLD_SIGACTION
config AM33_2
def_bool n

17
arch/mn10300/include/asm/signal.h
View File

@ -26,23 +26,8 @@ typedef struct {
unsigned long sig[_NSIG_WORDS];
} sigset_t;
struct old_sigaction {
__sighandler_t sa_handler;
old_sigset_t sa_mask;
unsigned long sa_flags;
__sigrestore_t sa_restorer;
};
#define __ARCH_HAS_SA_RESTORER
struct sigaction {
__sighandler_t sa_handler;
unsigned long sa_flags;
__sigrestore_t sa_restorer;
sigset_t sa_mask; /* mask last for extensibility */
};
struct k_sigaction {
struct sigaction sa;
};
#include <asm/sigcontext.h>
#endif /* _ASM_SIGNAL_H */

2
arch/mn10300/include/asm/unistd.h
View File

@ -41,8 +41,6 @@
#define __ARCH_WANT_SYS_OLDUMOUNT
#define __ARCH_WANT_SYS_SIGPENDING
#define __ARCH_WANT_SYS_SIGPROCMASK
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_SYS_FORK
#define __ARCH_WANT_SYS_VFORK
#define __ARCH_WANT_SYS_CLONE

60
arch/mn10300/kernel/signal.c
View File

@ -31,59 +31,6 @@
#define DEBUG_SIG 0
/*
* atomically swap in the new signal mask, and wait for a signal.
*/
asmlinkage long sys_sigsuspend(int history0, int history1, old_sigset_t mask)
{
sigset_t blocked;
siginitset(&blocked, mask);
return sigsuspend(&blocked);
}
/*
* set signal action syscall
*/
asmlinkage long sys_sigaction(int sig,
const struct old_sigaction __user *act,
struct old_sigaction __user *oact)
{
struct k_sigaction new_ka, old_ka;
int ret;
if (act) {
old_sigset_t mask;
if (verify_area(VERIFY_READ, act, sizeof(*act)) ||
__get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
__get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
__get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
__get_user(mask, &act->sa_mask))
return -EFAULT;
siginitset(&new_ka.sa.sa_mask, mask);
}
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
if (!ret && oact) {
if (verify_area(VERIFY_WRITE, oact, sizeof(*oact)) ||
__put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
__put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
__put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
__put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
return -EFAULT;
}
return ret;
}
/*
* set alternate signal stack syscall
*/
asmlinkage long sys_sigaltstack(const stack_t __user *uss, stack_t *uoss)
{
return do_sigaltstack(uss, uoss, current_frame()->sp);
}
/*
* do a signal return; undo the signal stack.
*/
@ -193,8 +140,7 @@ asmlinkage long sys_rt_sigreturn(void)
if (restore_sigcontext(current_frame(), &frame->uc.uc_mcontext, &d0))
goto badframe;
if (do_sigaltstack(&frame->uc.uc_stack, NULL, current_frame()->sp) ==
-EFAULT)
if (restore_altstack(&frame->uc.uc_stack))
goto badframe;
return d0;
@ -359,9 +305,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
/* create the ucontext. */
if (__put_user(0, &frame->uc.uc_flags) ||
__put_user(0, &frame->uc.uc_link) ||
__put_user((void *)current->sas_ss_sp, &frame->uc.uc_stack.ss_sp) ||
__put_user(sas_ss_flags(regs->sp), &frame->uc.uc_stack.ss_flags) ||
__put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size) ||
__save_altstack(&frame->uc.uc_stack, regs->sp) ||
setup_sigcontext(&frame->uc.uc_mcontext,
&frame->fpuctx, regs, set->sig[0]) ||
__copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)))

4
arch/openrisc/kernel/entry.S
View File

@ -1083,10 +1083,6 @@ ENTRY(__sys_fork)
l.j _fork_save_extra_regs_and_call
l.addi r3,r1,0
ENTRY(sys_sigaltstack)
l.j _sys_sigaltstack
l.addi r5,r1,0
ENTRY(sys_rt_sigreturn)
l.j _sys_rt_sigreturn
l.addi r3,r1,0

15
arch/openrisc/kernel/signal.c
View File

@ -33,12 +33,6 @@
#define DEBUG_SIG 0
asmlinkage long
_sys_sigaltstack(const stack_t *uss, stack_t *uoss, struct pt_regs *regs)
{
return do_sigaltstack(uss, uoss, regs->sp);
}
struct rt_sigframe {
struct siginfo *pinfo;
void *puc;
@ -103,9 +97,7 @@ asmlinkage long _sys_rt_sigreturn(struct pt_regs *regs)
if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
goto badframe;
/* It is more difficult to avoid calling this function than to
call it and ignore errors. */
if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->sp) == -EFAULT)
if (restore_altstack(&frame->uc.uc_stack))
goto badframe;
return regs->gpr[11];
@ -205,10 +197,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext));
err |= __put_user(0, &frame->uc.uc_flags);
err |= __put_user(NULL, &frame->uc.uc_link);
err |= __put_user((void *)current->sas_ss_sp,
&frame->uc.uc_stack.ss_sp);
err |= __put_user(sas_ss_flags(regs->sp), &frame->uc.uc_stack.ss_flags);
err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
err |= __save_altstack(&frame->uc.uc_stack, regs->sp);
err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, set->sig[0]);
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));

6
arch/parisc/include/asm/signal.h
View File

@ -20,15 +20,13 @@ typedef struct {
unsigned long sig[_NSIG_WORDS];
} sigset_t;
#ifndef __KERNEL__
struct sigaction {
__sighandler_t sa_handler;
unsigned long sa_flags;
sigset_t sa_mask; /* mask last for extensibility */
};
struct k_sigaction {
struct sigaction sa;
};
#endif
#include <asm/sigcontext.h>

3
arch/parisc/include/asm/unistd.h
View File

@ -161,9 +161,6 @@ type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5) \
#define __ARCH_WANT_SYS_OLDUMOUNT
#define __ARCH_WANT_SYS_SIGPENDING
#define __ARCH_WANT_SYS_SIGPROCMASK
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_SYS_FORK
#define __ARCH_WANT_SYS_VFORK
#define __ARCH_WANT_SYS_CLONE

38
arch/parisc/kernel/entry.S
View File

@ -1748,44 +1748,6 @@ ENTRY(sys_rt_sigreturn_wrapper)
LDREG PT_GR28(%r1),%r28 /* reload original r28 for syscall_exit */
ENDPROC(sys_rt_sigreturn_wrapper)
ENTRY(sys_sigaltstack_wrapper)
/* Get the user stack pointer */
LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
ldo TASK_REGS(%r1),%r24 /* get pt regs */
LDREG TASK_PT_GR30(%r24),%r24
STREG %r2, -RP_OFFSET(%r30)
#ifdef CONFIG_64BIT
ldo FRAME_SIZE(%r30), %r30
BL do_sigaltstack,%r2
ldo -16(%r30),%r29 /* Reference param save area */
#else
BL do_sigaltstack,%r2
ldo FRAME_SIZE(%r30), %r30
#endif
ldo -FRAME_SIZE(%r30), %r30
LDREG -RP_OFFSET(%r30), %r2
bv %r0(%r2)
nop
ENDPROC(sys_sigaltstack_wrapper)
#ifdef CONFIG_64BIT
ENTRY(sys32_sigaltstack_wrapper)
/* Get the user stack pointer */
LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r24
LDREG TASK_PT_GR30(%r24),%r24
STREG %r2, -RP_OFFSET(%r30)
ldo FRAME_SIZE(%r30), %r30
BL do_sigaltstack32,%r2
ldo -16(%r30),%r29 /* Reference param save area */
ldo -FRAME_SIZE(%r30), %r30
LDREG -RP_OFFSET(%r30), %r2
bv %r0(%r2)
nop
ENDPROC(sys32_sigaltstack_wrapper)
#endif
ENTRY(syscall_exit)
/* NOTE: HP-UX syscalls also come through here
* after hpux_syscall_exit fixes up return

19
arch/parisc/kernel/signal.c
View File

@ -143,7 +143,7 @@ sys_rt_sigreturn(struct pt_regs *regs, int in_syscall)
goto give_sigsegv;
DBG(1,"sys_rt_sigreturn: usp %#08lx stack 0x%p\n",
usp, &compat_frame->uc.uc_stack);
if (do_sigaltstack32(&compat_frame->uc.uc_stack, NULL, usp) == -EFAULT)
if (compat_restore_altstack(&compat_frame->uc.uc_stack))
goto give_sigsegv;
} else
#endif
@ -154,7 +154,7 @@ sys_rt_sigreturn(struct pt_regs *regs, int in_syscall)
goto give_sigsegv;
DBG(1,"sys_rt_sigreturn: usp %#08lx stack 0x%p\n",
usp, &frame->uc.uc_stack);
if (do_sigaltstack(&frame->uc.uc_stack, NULL, usp) == -EFAULT)
if (restore_altstack(&frame->uc.uc_stack))
goto give_sigsegv;
}
@ -262,15 +262,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
if (is_compat_task()) {
DBG(1,"setup_rt_frame: frame->info = 0x%p\n", &compat_frame->info);
err |= copy_siginfo_to_user32(&compat_frame->info, info);
DBG(1,"SETUP_RT_FRAME: 1\n");
compat_val = (compat_int_t)current->sas_ss_sp;
err |= __put_user(compat_val, &compat_frame->uc.uc_stack.ss_sp);
DBG(1,"SETUP_RT_FRAME: 2\n");
compat_val = (compat_int_t)current->sas_ss_size;
err |= __put_user(compat_val, &compat_frame->uc.uc_stack.ss_size);
DBG(1,"SETUP_RT_FRAME: 3\n");
compat_val = sas_ss_flags(regs->gr[30]);
err |= __put_user(compat_val, &compat_frame->uc.uc_stack.ss_flags);
err |= __compat_save_altstack( &compat_frame->uc.uc_stack, regs->gr[30]);
DBG(1,"setup_rt_frame: frame->uc = 0x%p\n", &compat_frame->uc);
DBG(1,"setup_rt_frame: frame->uc.uc_mcontext = 0x%p\n", &compat_frame->uc.uc_mcontext);
err |= setup_sigcontext32(&compat_frame->uc.uc_mcontext,
@ -282,10 +274,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
{
DBG(1,"setup_rt_frame: frame->info = 0x%p\n", &frame->info);
err |= copy_siginfo_to_user(&frame->info, info);
err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
err |= __put_user(sas_ss_flags(regs->gr[30]),
&frame->uc.uc_stack.ss_flags);
err |= __save_altstack(&frame->uc.uc_stack, regs->gr[30]);
DBG(1,"setup_rt_frame: frame->uc = 0x%p\n", &frame->uc);
DBG(1,"setup_rt_frame: frame->uc.uc_mcontext = 0x%p\n", &frame->uc.uc_mcontext);
err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, in_syscall);

149
arch/parisc/kernel/signal32.c
View File

@ -60,136 +60,6 @@ sigset_64to32(compat_sigset_t *s32, sigset_t *s64)
s32->sig[1] = (s64->sig[0] >> 32) & 0xffffffffUL;
}
static int
put_sigset32(compat_sigset_t __user *up, sigset_t *set, size_t sz)
{
compat_sigset_t s;
if (sz != sizeof(compat_sigset_t))
return -EINVAL;
sigset_64to32(&s, set);
return copy_to_user(up, &s, sizeof s);
}
static int
get_sigset32(compat_sigset_t __user *up, sigset_t *set, size_t sz)
{
compat_sigset_t s;
int r;
if (sz != sizeof(compat_sigset_t))
return -EINVAL;
if ((r = copy_from_user(&s, up, sz)) == 0) {
sigset_32to64(set, &s);
}
return r;
}
int sys32_rt_sigprocmask(int how, compat_sigset_t __user *set, compat_sigset_t __user *oset,
unsigned int sigsetsize)
{
sigset_t old_set, new_set;
int ret;
if (set) {
ret = get_sigset32(set, &new_set, sigsetsize);
if (ret)
return ret;
}
KERNEL_SYSCALL(ret, sys_rt_sigprocmask, how, set ? (sigset_t __user *)&new_set : NULL,
oset ? (sigset_t __user *)&old_set : NULL, sigsetsize);
if (!ret && oset && put_sigset32(oset, &old_set, sigsetsize))
return -EFAULT;
return ret;
}
int sys32_rt_sigpending(compat_sigset_t __user *uset, unsigned int sigsetsize)
{
int ret;
sigset_t set;
KERNEL_SYSCALL(ret, sys_rt_sigpending, (sigset_t __user *)&set, sigsetsize);
if (!ret && put_sigset32(uset, &set, sigsetsize))
return -EFAULT;
return ret;
}
long
sys32_rt_sigaction(int sig, const struct sigaction32 __user *act, struct sigaction32 __user *oact,
size_t sigsetsize)
{
struct k_sigaction32 new_sa32, old_sa32;
struct k_sigaction new_sa, old_sa;
int ret = -EINVAL;
/* XXX: Don't preclude handling different sized sigset_t's. */
if (sigsetsize != sizeof(compat_sigset_t))
return -EINVAL;
if (act) {
if (copy_from_user(&new_sa32.sa, act, sizeof new_sa32.sa))
return -EFAULT;
new_sa.sa.sa_handler = (__sighandler_t)(unsigned long)new_sa32.sa.sa_handler;
new_sa.sa.sa_flags = new_sa32.sa.sa_flags;
sigset_32to64(&new_sa.sa.sa_mask, &new_sa32.sa.sa_mask);
}
ret = do_sigaction(sig, act ? &new_sa : NULL, oact ? &old_sa : NULL);
if (!ret && oact) {
sigset_64to32(&old_sa32.sa.sa_mask, &old_sa.sa.sa_mask);
old_sa32.sa.sa_flags = old_sa.sa.sa_flags;
old_sa32.sa.sa_handler = (__sighandler_t32)(unsigned long)old_sa.sa.sa_handler;
if (copy_to_user(oact, &old_sa32.sa, sizeof old_sa32.sa))
return -EFAULT;
}
return ret;
}
int
do_sigaltstack32 (const compat_stack_t __user *uss32, compat_stack_t __user *uoss32, unsigned long sp)
{
compat_stack_t ss32, oss32;
stack_t ss, oss;
stack_t *ssp = NULL, *ossp = NULL;
int ret;
if (uss32) {
if (copy_from_user(&ss32, uss32, sizeof ss32))
return -EFAULT;
ss.ss_sp = (void __user *)(unsigned long)ss32.ss_sp;
ss.ss_flags = ss32.ss_flags;
ss.ss_size = ss32.ss_size;
ssp = &ss;
}
if (uoss32)
ossp = &oss;
KERNEL_SYSCALL(ret, do_sigaltstack, (const stack_t __user *)ssp, (stack_t __user *)ossp, sp);
if (!ret && uoss32) {
oss32.ss_sp = (unsigned int)(unsigned long)oss.ss_sp;
oss32.ss_flags = oss.ss_flags;
oss32.ss_size = oss.ss_size;
if (copy_to_user(uoss32, &oss32, sizeof *uoss32))
return -EFAULT;
}
return ret;
}
long
restore_sigcontext32(struct compat_sigcontext __user *sc, struct compat_regfile __user * rf,
struct pt_regs *regs)
@ -506,22 +376,3 @@ copy_siginfo_to_user32 (compat_siginfo_t __user *to, siginfo_t *from)
}
return err;
}
asmlinkage long compat_sys_rt_sigqueueinfo(int pid, int sig,
struct compat_siginfo __user *uinfo)
{
siginfo_t info;
if (copy_siginfo_from_user32(&info, uinfo))
return -EFAULT;
/* Not even root can pretend to send signals from the kernel.
Nor can they impersonate a kill(), which adds source info. */
if (info.si_code >= 0)
return -EPERM;
info.si_signo = sig;
/* POSIX.1b doesn't mention process groups. */
return kill_proc_info(sig, &info, pid);
}

23
arch/parisc/kernel/signal32.h
View File

@ -21,23 +21,6 @@
#include <linux/compat.h>
typedef compat_uptr_t compat_sighandler_t;
typedef struct compat_sigaltstack {
compat_uptr_t ss_sp;
compat_int_t ss_flags;
compat_size_t ss_size;
} compat_stack_t;
/* Most things should be clean enough to redefine this at will, if care
is taken to make libc match. */
struct compat_sigaction {
compat_sighandler_t sa_handler;
compat_uint_t sa_flags;
compat_sigset_t sa_mask; /* mask last for extensibility */
};
/* 32-bit ucontext as seen from an 64-bit kernel */
struct compat_ucontext {
compat_uint_t uc_flags;
@ -51,10 +34,6 @@ struct compat_ucontext {
/* ELF32 signal handling */
struct k_sigaction32 {
struct compat_sigaction sa;
};
int copy_siginfo_to_user32 (compat_siginfo_t __user *to, siginfo_t *from);
int copy_siginfo_from_user32 (siginfo_t *to, compat_siginfo_t __user *from);
@ -102,8 +81,6 @@ struct compat_rt_sigframe {
void sigset_32to64(sigset_t *s64, compat_sigset_t *s32);
void sigset_64to32(compat_sigset_t *s32, sigset_t *s64);
int do_sigaltstack32 (const compat_stack_t __user *uss32,
compat_stack_t __user *uoss32, unsigned long sp);
long restore_sigcontext32(struct compat_sigcontext __user *sc,
struct compat_regfile __user *rf,
struct pt_regs *regs);

12
arch/parisc/kernel/sys32.h
View File

@ -33,16 +33,4 @@
set_fs (old_fs); \
}
#ifdef CONFIG_COMPAT
typedef __u32 __sighandler_t32;
struct sigaction32 {
__sighandler_t32 sa_handler;
unsigned int sa_flags;
compat_sigset_t sa_mask; /* mask last for extensibility */
};
#endif
#endif

8
arch/parisc/kernel/syscall_table.S
View File

@ -252,7 +252,7 @@
ENTRY_SAME(mremap)
ENTRY_SAME(setresuid)
ENTRY_SAME(getresuid) /* 165 */
ENTRY_DIFF(sigaltstack_wrapper)
ENTRY_COMP(sigaltstack)
ENTRY_SAME(ni_syscall) /* query_module */
ENTRY_SAME(poll)
/* structs contain pointers and an in_addr... */
@ -262,9 +262,9 @@
ENTRY_SAME(prctl)
/* signals need a careful review */
ENTRY_SAME(rt_sigreturn_wrapper)
ENTRY_DIFF(rt_sigaction)
ENTRY_DIFF(rt_sigprocmask) /* 175 */
ENTRY_DIFF(rt_sigpending)
ENTRY_COMP(rt_sigaction)
ENTRY_COMP(rt_sigprocmask) /* 175 */
ENTRY_COMP(rt_sigpending)
ENTRY_COMP(rt_sigtimedwait)
/* even though the struct siginfo_t is different, it appears like
* all the paths use values which should be same wide and narrow.

3
arch/powerpc/Kconfig
View File

@ -143,6 +143,8 @@ config PPC
select MODULES_USE_ELF_RELA
select CLONE_BACKWARDS
select ARCH_USE_BUILTIN_BSWAP
select OLD_SIGSUSPEND
select OLD_SIGACTION if PPC32
config EARLY_PRINTK
bool
@ -153,6 +155,7 @@ config COMPAT
default y if PPC64
select COMPAT_BINFMT_ELF
select ARCH_WANT_OLD_COMPAT_IPC
select COMPAT_OLD_SIGACTION
config SYSVIPC_COMPAT
bool

1
arch/powerpc/include/asm/signal.h
View File

@ -1,6 +1,7 @@
#ifndef _ASM_POWERPC_SIGNAL_H
#define _ASM_POWERPC_SIGNAL_H
#define __ARCH_HAS_SA_RESTORER
#include <uapi/asm/signal.h>
#endif /* _ASM_POWERPC_SIGNAL_H */

15
arch/powerpc/include/asm/syscalls.h
View File

@ -5,11 +5,8 @@
#include <linux/compiler.h>
#include <linux/linkage.h>
#include <linux/types.h>
#include <asm/signal.h>
struct pt_regs;
struct rtas_args;
struct sigaction;
asmlinkage unsigned long sys_mmap(unsigned long addr, size_t len,
unsigned long prot, unsigned long flags,
@ -17,20 +14,8 @@ asmlinkage unsigned long sys_mmap(unsigned long addr, size_t len,
asmlinkage unsigned long sys_mmap2(unsigned long addr, size_t len,
unsigned long prot, unsigned long flags,
unsigned long fd, unsigned long pgoff);
asmlinkage long sys_pipe(int __user *fildes);
asmlinkage long sys_pipe2(int __user *fildes, int flags);
asmlinkage long sys_rt_sigaction(int sig,
const struct sigaction __user *act,
struct sigaction __user *oact, size_t sigsetsize);
asmlinkage long ppc64_personality(unsigned long personality);
asmlinkage int ppc_rtas(struct rtas_args __user *uargs);
asmlinkage time_t sys64_time(time_t __user * tloc);
asmlinkage long sys_rt_sigsuspend(sigset_t __user *unewset,
size_t sigsetsize);
asmlinkage long sys_sigaltstack(const stack_t __user *uss,
stack_t __user *uoss, unsigned long r5, unsigned long r6,
unsigned long r7, unsigned long r8, struct pt_regs *regs);
#endif /* __KERNEL__ */
#endif /* __ASM_POWERPC_SYSCALLS_H */

63
arch/powerpc/include/asm/systbl.h
View File

@ -10,8 +10,8 @@ SYSCALL_SPU(read)
SYSCALL_SPU(write)
COMPAT_SYS_SPU(open)
SYSCALL_SPU(close)
COMPAT_SYS_SPU(waitpid)
COMPAT_SYS_SPU(creat)
SYSCALL_SPU(waitpid)
SYSCALL_SPU(creat)
SYSCALL_SPU(link)
SYSCALL_SPU(unlink)
COMPAT_SYS(execve)
@ -36,13 +36,13 @@ SYSCALL(pause)
COMPAT_SYS(utime)
SYSCALL(ni_syscall)
SYSCALL(ni_syscall)
COMPAT_SYS_SPU(access)
COMPAT_SYS_SPU(nice)
SYSCALL_SPU(access)
SYSCALL_SPU(nice)
SYSCALL(ni_syscall)
SYSCALL_SPU(sync)
COMPAT_SYS_SPU(kill)
SYSCALL_SPU(kill)
SYSCALL_SPU(rename)
COMPAT_SYS_SPU(mkdir)
SYSCALL_SPU(mkdir)
SYSCALL_SPU(rmdir)
SYSCALL_SPU(dup)
SYSCALL_SPU(pipe)
@ -60,10 +60,10 @@ SYSCALL(ni_syscall)
COMPAT_SYS_SPU(ioctl)
COMPAT_SYS_SPU(fcntl)
SYSCALL(ni_syscall)
COMPAT_SYS_SPU(setpgid)
SYSCALL_SPU(setpgid)
SYSCALL(ni_syscall)
SYSX(sys_ni_syscall,sys_olduname, sys_olduname)
COMPAT_SYS_SPU(umask)
SYSCALL_SPU(umask)
SYSCALL_SPU(chroot)
COMPAT_SYS(ustat)
SYSCALL_SPU(dup2)
@ -72,23 +72,24 @@ SYSCALL_SPU(getpgrp)
SYSCALL_SPU(setsid)
SYS32ONLY(sigaction)
SYSCALL_SPU(sgetmask)
COMPAT_SYS_SPU(ssetmask)
SYSCALL_SPU(ssetmask)
SYSCALL_SPU(setreuid)
SYSCALL_SPU(setregid)
#define compat_sys_sigsuspend sys_sigsuspend
SYS32ONLY(sigsuspend)
COMPAT_SYS(sigpending)
COMPAT_SYS_SPU(sethostname)
SYSCALL_SPU(sethostname)
COMPAT_SYS_SPU(setrlimit)
COMPAT_SYS(old_getrlimit)
COMPAT_SYS_SPU(getrusage)
COMPAT_SYS_SPU(gettimeofday)
COMPAT_SYS_SPU(settimeofday)
COMPAT_SYS_SPU(getgroups)
COMPAT_SYS_SPU(setgroups)
SYSCALL_SPU(getgroups)
SYSCALL_SPU(setgroups)
SYSX(sys_ni_syscall,sys_ni_syscall,ppc_select)
SYSCALL_SPU(symlink)
OLDSYS(lstat)
COMPAT_SYS_SPU(readlink)
SYSCALL_SPU(readlink)
SYSCALL(uselib)
SYSCALL(swapon)
SYSCALL(reboot)
@ -99,14 +100,14 @@ COMPAT_SYS_SPU(truncate)
COMPAT_SYS_SPU(ftruncate)
SYSCALL_SPU(fchmod)
SYSCALL_SPU(fchown)
COMPAT_SYS_SPU(getpriority)
COMPAT_SYS_SPU(setpriority)
SYSCALL_SPU(getpriority)
SYSCALL_SPU(setpriority)
SYSCALL(ni_syscall)
COMPAT_SYS(statfs)
COMPAT_SYS(fstatfs)
SYSCALL(ni_syscall)
COMPAT_SYS_SPU(socketcall)
COMPAT_SYS_SPU(syslog)
SYSCALL_SPU(syslog)
COMPAT_SYS_SPU(setitimer)
COMPAT_SYS_SPU(getitimer)
COMPAT_SYS_SPU(newstat)
@ -124,7 +125,7 @@ COMPAT_SYS(ipc)
SYSCALL_SPU(fsync)
SYS32ONLY(sigreturn)
PPC_SYS(clone)
COMPAT_SYS_SPU(setdomainname)
SYSCALL_SPU(setdomainname)
SYSCALL_SPU(newuname)
SYSCALL(ni_syscall)
COMPAT_SYS_SPU(adjtimex)
@ -135,10 +136,10 @@ SYSCALL(init_module)
SYSCALL(delete_module)
SYSCALL(ni_syscall)
SYSCALL(quotactl)
COMPAT_SYS_SPU(getpgid)
SYSCALL_SPU(getpgid)
SYSCALL_SPU(fchdir)
SYSCALL_SPU(bdflush)
COMPAT_SYS(sysfs)
SYSCALL_SPU(sysfs)
SYSX_SPU(ppc64_personality,ppc64_personality,sys_personality)
SYSCALL(ni_syscall)
SYSCALL_SPU(setfsuid)
@ -150,21 +151,21 @@ SYSCALL_SPU(flock)
SYSCALL_SPU(msync)
COMPAT_SYS_SPU(readv)
COMPAT_SYS_SPU(writev)
COMPAT_SYS_SPU(getsid)
SYSCALL_SPU(getsid)
SYSCALL_SPU(fdatasync)
COMPAT_SYS(sysctl)
SYSCALL_SPU(mlock)
SYSCALL_SPU(munlock)
SYSCALL_SPU(mlockall)
SYSCALL_SPU(munlockall)
COMPAT_SYS_SPU(sched_setparam)
COMPAT_SYS_SPU(sched_getparam)
COMPAT_SYS_SPU(sched_setscheduler)
COMPAT_SYS_SPU(sched_getscheduler)
SYSCALL_SPU(sched_setparam)
SYSCALL_SPU(sched_getparam)
SYSCALL_SPU(sched_setscheduler)
SYSCALL_SPU(sched_getscheduler)
SYSCALL_SPU(sched_yield)
COMPAT_SYS_SPU(sched_get_priority_max)
COMPAT_SYS_SPU(sched_get_priority_min)
SYSX_SPU(sys_sched_rr_get_interval,compat_sys_sched_rr_get_interval_wrapper,sys_sched_rr_get_interval)
SYSCALL_SPU(sched_get_priority_max)
SYSCALL_SPU(sched_get_priority_min)
COMPAT_SYS_SPU(sched_rr_get_interval)
COMPAT_SYS_SPU(nanosleep)
SYSCALL_SPU(mremap)
SYSCALL_SPU(setresuid)
@ -174,7 +175,7 @@ SYSCALL_SPU(poll)
SYSCALL(ni_syscall)
SYSCALL_SPU(setresgid)
SYSCALL_SPU(getresgid)
COMPAT_SYS_SPU(prctl)
SYSCALL_SPU(prctl)
COMPAT_SYS(rt_sigreturn)
COMPAT_SYS(rt_sigaction)
COMPAT_SYS(rt_sigprocmask)
@ -253,7 +254,7 @@ COMPAT_SYS_SPU(clock_gettime)
COMPAT_SYS_SPU(clock_getres)
COMPAT_SYS_SPU(clock_nanosleep)
SYSX(ppc64_swapcontext,ppc32_swapcontext,ppc_swapcontext)
COMPAT_SYS_SPU(tgkill)
SYSCALL_SPU(tgkill)
COMPAT_SYS_SPU(utimes)
COMPAT_SYS_SPU(statfs64)
COMPAT_SYS_SPU(fstatfs64)
@ -276,8 +277,8 @@ COMPAT_SYS(add_key)
COMPAT_SYS(request_key)
COMPAT_SYS(keyctl)
COMPAT_SYS(waitid)
COMPAT_SYS(ioprio_set)
COMPAT_SYS(ioprio_get)
SYSCALL(ioprio_set)
SYSCALL(ioprio_get)
SYSCALL(inotify_init)
SYSCALL(inotify_add_watch)
SYSCALL(inotify_rm_watch)

4
arch/powerpc/include/asm/unistd.h
View File

@ -44,17 +44,13 @@
#define __ARCH_WANT_SYS_OLDUMOUNT
#define __ARCH_WANT_SYS_SIGPENDING
#define __ARCH_WANT_SYS_SIGPROCMASK
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#ifdef CONFIG_PPC32
#define __ARCH_WANT_OLD_STAT
#endif
#ifdef CONFIG_PPC64
#define __ARCH_WANT_COMPAT_SYS_TIME
#define __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_SYS_NEWFSTATAT
#define __ARCH_WANT_COMPAT_SYS_SENDFILE
#define __ARCH_WANT_COMPAT_SYS_SCHED_RR_GET_INTERVAL
#endif
#define __ARCH_WANT_SYS_FORK
#define __ARCH_WANT_SYS_VFORK

6
arch/powerpc/include/uapi/asm/signal.h
View File

@ -90,6 +90,7 @@ typedef struct {
#include <asm-generic/signal-defs.h>
#ifndef __KERNEL__
struct old_sigaction {
__sighandler_t sa_handler;
old_sigset_t sa_mask;
@ -103,10 +104,7 @@ struct sigaction {
__sigrestore_t sa_restorer;
sigset_t sa_mask; /* mask last for extensibility */
};
struct k_sigaction {
struct sigaction sa;
};
#endif
typedef struct sigaltstack {
void __user *ss_sp;

26
arch/powerpc/kernel/ppc32.h
View File

@ -16,30 +16,6 @@
/* These are here to support 32-bit syscalls on a 64-bit kernel. */
#define __old_sigaction32 old_sigaction32
struct __old_sigaction32 {
compat_uptr_t sa_handler;
compat_old_sigset_t sa_mask;
unsigned int sa_flags;
compat_uptr_t sa_restorer; /* not used by Linux/SPARC yet */
};
struct sigaction32 {
compat_uptr_t sa_handler; /* Really a pointer, but need to deal with 32 bits */
unsigned int sa_flags;
compat_uptr_t sa_restorer; /* Another 32 bit pointer */
compat_sigset_t sa_mask; /* A 32 bit mask */
};
typedef struct sigaltstack_32 {
unsigned int ss_sp;
int ss_flags;
compat_size_t ss_size;
} stack_32_t;
struct pt_regs32 {
unsigned int gpr[32];
unsigned int nip;
@ -75,7 +51,7 @@ struct mcontext32 {
struct ucontext32 {
unsigned int uc_flags;
unsigned int uc_link;
stack_32_t uc_stack;
compat_stack_t uc_stack;
int uc_pad[7];
compat_uptr_t uc_regs; /* points to uc_mcontext field */
compat_sigset_t uc_sigmask; /* mask last for extensibility */

7
arch/powerpc/kernel/signal.c
View File

@ -170,10 +170,3 @@ void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags)
tracehook_notify_resume(regs);
}
}
long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
unsigned long r5, unsigned long r6, unsigned long r7,
unsigned long r8, struct pt_regs *regs)
{
return do_sigaltstack(uss, uoss, regs->gpr[1]);
}

253
arch/powerpc/kernel/signal_32.c
View File

@ -57,10 +57,7 @@
#undef DEBUG_SIG
#ifdef CONFIG_PPC64
#define sys_sigsuspend compat_sys_sigsuspend
#define sys_rt_sigsuspend compat_sys_rt_sigsuspend
#define sys_rt_sigreturn compat_sys_rt_sigreturn
#define sys_sigaction compat_sys_sigaction
#define sys_swapcontext compat_sys_swapcontext
#define sys_sigreturn compat_sys_sigreturn
@ -69,6 +66,8 @@
#define mcontext mcontext32
#define ucontext ucontext32
#define __save_altstack __compat_save_altstack
/*
* Userspace code may pass a ucontext which doesn't include VSX added
* at the end. We need to check for this case.
@ -131,23 +130,6 @@ static inline int get_sigset_t(sigset_t *set,
return 0;
}
static inline int get_old_sigaction(struct k_sigaction *new_ka,
struct old_sigaction __user *act)
{
compat_old_sigset_t mask;
compat_uptr_t handler, restorer;
if (get_user(handler, &act->sa_handler) ||
__get_user(restorer, &act->sa_restorer) ||
__get_user(new_ka->sa.sa_flags, &act->sa_flags) ||
__get_user(mask, &act->sa_mask))
return -EFAULT;
new_ka->sa.sa_handler = compat_ptr(handler);
new_ka->sa.sa_restorer = compat_ptr(restorer);
siginitset(&new_ka->sa.sa_mask, mask);
return 0;
}
#define to_user_ptr(p) ptr_to_compat(p)
#define from_user_ptr(p) compat_ptr(p)
@ -197,21 +179,6 @@ static inline int get_sigset_t(sigset_t *set, const sigset_t __user *uset)
return copy_from_user(set, uset, sizeof(*uset));
}
static inline int get_old_sigaction(struct k_sigaction *new_ka,
struct old_sigaction __user *act)
{
old_sigset_t mask;
if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
__get_user(new_ka->sa.sa_handler, &act->sa_handler) ||
__get_user(new_ka->sa.sa_restorer, &act->sa_restorer) ||
__get_user(new_ka->sa.sa_flags, &act->sa_flags) ||
__get_user(mask, &act->sa_mask))
return -EFAULT;
siginitset(&new_ka->sa.sa_mask, mask);
return 0;
}
#define to_user_ptr(p) ((unsigned long)(p))
#define from_user_ptr(p) ((void __user *)(p))
@ -235,50 +202,8 @@ static inline int restore_general_regs(struct pt_regs *regs,
return -EFAULT;
return 0;
}
#endif /* CONFIG_PPC64 */
/*
* Atomically swap in the new signal mask, and wait for a signal.
*/
long sys_sigsuspend(old_sigset_t mask)
{
sigset_t blocked;
siginitset(&blocked, mask);
return sigsuspend(&blocked);
}
long sys_sigaction(int sig, struct old_sigaction __user *act,
struct old_sigaction __user *oact)
{
struct k_sigaction new_ka, old_ka;
int ret;
#ifdef CONFIG_PPC64
if (sig < 0)
sig = -sig;
#endif
if (act) {
if (get_old_sigaction(&new_ka, act))
return -EFAULT;
}
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
if (!ret && oact) {
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
__put_user(to_user_ptr(old_ka.sa.sa_handler),
&oact->sa_handler) ||
__put_user(to_user_ptr(old_ka.sa.sa_restorer),
&oact->sa_restorer) ||
__put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
__put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
return -EFAULT;
}
return ret;
}
/*
* When we have signals to deliver, we set up on the
* user stack, going down from the original stack pointer:
@ -951,89 +876,6 @@ static long restore_tm_user_regs(struct pt_regs *regs,
#endif
#ifdef CONFIG_PPC64
long compat_sys_rt_sigaction(int sig, const struct sigaction32 __user *act,
struct sigaction32 __user *oact, size_t sigsetsize)
{
struct k_sigaction new_ka, old_ka;
int ret;
/* XXX: Don't preclude handling different sized sigset_t's. */
if (sigsetsize != sizeof(compat_sigset_t))
return -EINVAL;
if (act) {
compat_uptr_t handler;
ret = get_user(handler, &act->sa_handler);
new_ka.sa.sa_handler = compat_ptr(handler);
ret |= get_sigset_t(&new_ka.sa.sa_mask, &act->sa_mask);
ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
if (ret)
return -EFAULT;
}
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
if (!ret && oact) {
ret = put_user(to_user_ptr(old_ka.sa.sa_handler), &oact->sa_handler);
ret |= put_sigset_t(&oact->sa_mask, &old_ka.sa.sa_mask);
ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
}
return ret;
}
/*
* Note: it is necessary to treat how as an unsigned int, with the
* corresponding cast to a signed int to insure that the proper
* conversion (sign extension) between the register representation
* of a signed int (msr in 32-bit mode) and the register representation
* of a signed int (msr in 64-bit mode) is performed.
*/
long compat_sys_rt_sigprocmask(u32 how, compat_sigset_t __user *set,
compat_sigset_t __user *oset, size_t sigsetsize)
{
sigset_t s;
sigset_t __user *up;
int ret;
mm_segment_t old_fs = get_fs();
if (set) {
if (get_sigset_t(&s, set))
return -EFAULT;
}
set_fs(KERNEL_DS);
/* This is valid because of the set_fs() */
up = (sigset_t __user *) &s;
ret = sys_rt_sigprocmask((int)how, set ? up : NULL, oset ? up : NULL,
sigsetsize);
set_fs(old_fs);
if (ret)
return ret;
if (oset) {
if (put_sigset_t(oset, &s))
return -EFAULT;
}
return 0;
}
long compat_sys_rt_sigpending(compat_sigset_t __user *set, compat_size_t sigsetsize)
{
sigset_t s;
int ret;
mm_segment_t old_fs = get_fs();
set_fs(KERNEL_DS);
/* The __user pointer cast is valid because of the set_fs() */
ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
set_fs(old_fs);
if (!ret) {
if (put_sigset_t(set, &s))
return -EFAULT;
}
return ret;
}
int copy_siginfo_to_user32(struct compat_siginfo __user *d, siginfo_t *s)
{
int err;
@ -1102,79 +944,6 @@ int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from)
return 0;
}
/*
* Note: it is necessary to treat pid and sig as unsigned ints, with the
* corresponding cast to a signed int to insure that the proper conversion
* (sign extension) between the register representation of a signed int
* (msr in 32-bit mode) and the register representation of a signed int
* (msr in 64-bit mode) is performed.
*/
long compat_sys_rt_sigqueueinfo(u32 pid, u32 sig, compat_siginfo_t __user *uinfo)
{
siginfo_t info;
int ret;
mm_segment_t old_fs = get_fs();
ret = copy_siginfo_from_user32(&info, uinfo);
if (unlikely(ret))
return ret;
set_fs (KERNEL_DS);
/* The __user pointer cast is valid becasuse of the set_fs() */
ret = sys_rt_sigqueueinfo((int)pid, (int)sig, (siginfo_t __user *) &info);
set_fs (old_fs);
return ret;
}
/*
* Start Alternate signal stack support
*
* System Calls
* sigaltatck compat_sys_sigaltstack
*/
int compat_sys_sigaltstack(u32 __new, u32 __old, int r5,
int r6, int r7, int r8, struct pt_regs *regs)
{
stack_32_t __user * newstack = compat_ptr(__new);
stack_32_t __user * oldstack = compat_ptr(__old);
stack_t uss, uoss;
int ret;
mm_segment_t old_fs;
unsigned long sp;
compat_uptr_t ss_sp;
/*
* set sp to the user stack on entry to the system call
* the system call router sets R9 to the saved registers
*/
sp = regs->gpr[1];
/* Put new stack info in local 64 bit stack struct */
if (newstack) {
if (get_user(ss_sp, &newstack->ss_sp) ||
__get_user(uss.ss_flags, &newstack->ss_flags) ||
__get_user(uss.ss_size, &newstack->ss_size))
return -EFAULT;
uss.ss_sp = compat_ptr(ss_sp);
}
old_fs = get_fs();
set_fs(KERNEL_DS);
/* The __user pointer casts are valid because of the set_fs() */
ret = do_sigaltstack(
newstack ? (stack_t __user *) &uss : NULL,
oldstack ? (stack_t __user *) &uoss : NULL,
sp);
set_fs(old_fs);
/* Copy the stack information to the user output buffer */
if (!ret && oldstack &&
(put_user(ptr_to_compat(uoss.ss_sp), &oldstack->ss_sp) ||
__put_user(uoss.ss_flags, &oldstack->ss_flags) ||
__put_user(uoss.ss_size, &oldstack->ss_size)))
return -EFAULT;
return ret;
}
#endif /* CONFIG_PPC64 */
/*
@ -1202,10 +971,7 @@ int handle_rt_signal32(unsigned long sig, struct k_sigaction *ka,
/* Put the siginfo & fill in most of the ucontext */
if (copy_siginfo_to_user(&rt_sf->info, info)
|| __put_user(0, &rt_sf->uc.uc_flags)
|| __put_user(current->sas_ss_sp, &rt_sf->uc.uc_stack.ss_sp)
|| __put_user(sas_ss_flags(regs->gpr[1]),
&rt_sf->uc.uc_stack.ss_flags)
|| __put_user(current->sas_ss_size, &rt_sf->uc.uc_stack.ss_size)
|| __save_altstack(&rt_sf->uc.uc_stack, regs->gpr[1])
|| __put_user(to_user_ptr(&rt_sf->uc.uc_mcontext),
&rt_sf->uc.uc_regs)
|| put_sigset_t(&rt_sf->uc.uc_sigmask, oldset))
@ -1494,14 +1260,11 @@ long sys_rt_sigreturn(int r3, int r4, int r5, int r6, int r7, int r8,
* change it. -- paulus
*/
#ifdef CONFIG_PPC64
/*
* We use the compat_sys_ version that does the 32/64 bits conversion
* and takes userland pointer directly. What about error checking ?
* nobody does any...
*/
compat_sys_sigaltstack((u32)(u64)&rt_sf->uc.uc_stack, 0, 0, 0, 0, 0, regs);
if (compat_restore_altstack(&rt_sf->uc.uc_stack))
goto bad;
#else
do_sigaltstack(&rt_sf->uc.uc_stack, NULL, regs->gpr[1]);
if (restore_altstack(&rt_sf->uc.uc_stack))
goto bad;
#endif
set_thread_flag(TIF_RESTOREALL);
return 0;
@ -1617,7 +1380,7 @@ int sys_debug_setcontext(struct ucontext __user *ctx,
* always done it up until now so it is probably better not to
* change it. -- paulus
*/
do_sigaltstack(&ctx->uc_stack, NULL, regs->gpr[1]);
restore_altstack(&ctx->uc_stack);
set_thread_flag(TIF_RESTOREALL);
out:

11
arch/powerpc/kernel/signal_64.c
View File

@ -676,10 +676,8 @@ int sys_rt_sigreturn(unsigned long r3, unsigned long r4, unsigned long r5,
if (restore_sigcontext(regs, NULL, 1, &uc->uc_mcontext))
goto badframe;
/* do_sigaltstack expects a __user pointer and won't modify
* what's in there anyway
*/
do_sigaltstack(&uc->uc_stack, NULL, regs->gpr[1]);
if (restore_altstack(&uc->uc_stack))
goto badframe;
set_thread_flag(TIF_RESTOREALL);
return 0;
@ -723,10 +721,7 @@ int handle_rt_signal64(int signr, struct k_sigaction *ka, siginfo_t *info,
/* Create the ucontext. */
err |= __put_user(0, &frame->uc.uc_flags);
err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
err |= __put_user(sas_ss_flags(regs->gpr[1]),
&frame->uc.uc_stack.ss_flags);
err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
err |= __save_altstack(&frame->uc.uc_stack, regs->gpr[1]);
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
if (MSR_TM_ACTIVE(regs->msr)) {
/* The ucontext_t passed to userland points to the second

301
arch/powerpc/kernel/sys_ppc32.c
View File

@ -61,16 +61,6 @@ asmlinkage long ppc32_select(u32 n, compat_ulong_t __user *inp,
return compat_sys_select((int)n, inp, outp, exp, compat_ptr(tvp_x));
}
/* Note: it is necessary to treat option as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_sysfs(u32 option, u32 arg1, u32 arg2)
{
return sys_sysfs((int)option, arg1, arg2);
}
#ifdef CONFIG_SYSVIPC
long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr,
u32 fifth)
@ -156,125 +146,6 @@ asmlinkage long compat_sys_sendfile64_wrapper(u32 out_fd, u32 in_fd,
(off_t __user *)offset, count);
}
/* Note: it is necessary to treat option as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_prctl(u32 option, u32 arg2, u32 arg3, u32 arg4, u32 arg5)
{
return sys_prctl((int)option,
(unsigned long) arg2,
(unsigned long) arg3,
(unsigned long) arg4,
(unsigned long) arg5);
}
/* Note: it is necessary to treat pid as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_sched_rr_get_interval_wrapper(u32 pid,
struct compat_timespec __user *interval)
{
return compat_sys_sched_rr_get_interval((int)pid, interval);
}
/* Note: it is necessary to treat mode as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_access(const char __user * filename, u32 mode)
{
return sys_access(filename, (int)mode);
}
/* Note: it is necessary to treat mode as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_creat(const char __user * pathname, u32 mode)
{
return sys_creat(pathname, (int)mode);
}
/* Note: it is necessary to treat pid and options as unsigned ints,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_waitpid(u32 pid, unsigned int __user * stat_addr, u32 options)
{
return sys_waitpid((int)pid, stat_addr, (int)options);
}
/* Note: it is necessary to treat gidsetsize as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_getgroups(u32 gidsetsize, gid_t __user *grouplist)
{
return sys_getgroups((int)gidsetsize, grouplist);
}
/* Note: it is necessary to treat pid as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_getpgid(u32 pid)
{
return sys_getpgid((int)pid);
}
/* Note: it is necessary to treat pid as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_getsid(u32 pid)
{
return sys_getsid((int)pid);
}
/* Note: it is necessary to treat pid and sig as unsigned ints,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_kill(u32 pid, u32 sig)
{
return sys_kill((int)pid, (int)sig);
}
/* Note: it is necessary to treat mode as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_mkdir(const char __user * pathname, u32 mode)
{
return sys_mkdir(pathname, (int)mode);
}
long compat_sys_nice(u32 increment)
{
/* sign extend increment */
return sys_nice((int)increment);
}
off_t ppc32_lseek(unsigned int fd, u32 offset, unsigned int origin)
{
/* sign extend n */
@ -293,172 +164,6 @@ long compat_sys_ftruncate(int fd, u32 length)
return sys_ftruncate(fd, (int)length);
}
/* Note: it is necessary to treat bufsiz as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_readlink(const char __user * path, char __user * buf, u32 bufsiz)
{
return sys_readlink(path, buf, (int)bufsiz);
}
/* Note: it is necessary to treat option as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_sched_get_priority_max(u32 policy)
{
return sys_sched_get_priority_max((int)policy);
}
/* Note: it is necessary to treat policy as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_sched_get_priority_min(u32 policy)
{
return sys_sched_get_priority_min((int)policy);
}
/* Note: it is necessary to treat pid as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_sched_getparam(u32 pid, struct sched_param __user *param)
{
return sys_sched_getparam((int)pid, param);
}
/* Note: it is necessary to treat pid as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_sched_getscheduler(u32 pid)
{
return sys_sched_getscheduler((int)pid);
}
/* Note: it is necessary to treat pid as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_sched_setparam(u32 pid, struct sched_param __user *param)
{
return sys_sched_setparam((int)pid, param);
}
/* Note: it is necessary to treat pid and policy as unsigned ints,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_sched_setscheduler(u32 pid, u32 policy, struct sched_param __user *param)
{
return sys_sched_setscheduler((int)pid, (int)policy, param);
}
/* Note: it is necessary to treat len as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_setdomainname(char __user *name, u32 len)
{
return sys_setdomainname(name, (int)len);
}
/* Note: it is necessary to treat gidsetsize as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_setgroups(u32 gidsetsize, gid_t __user *grouplist)
{
return sys_setgroups((int)gidsetsize, grouplist);
}
asmlinkage long compat_sys_sethostname(char __user *name, u32 len)
{
/* sign extend len */
return sys_sethostname(name, (int)len);
}
/* Note: it is necessary to treat pid and pgid as unsigned ints,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_setpgid(u32 pid, u32 pgid)
{
return sys_setpgid((int)pid, (int)pgid);
}
long compat_sys_getpriority(u32 which, u32 who)
{
/* sign extend which and who */
return sys_getpriority((int)which, (int)who);
}
long compat_sys_setpriority(u32 which, u32 who, u32 niceval)
{
/* sign extend which, who and niceval */
return sys_setpriority((int)which, (int)who, (int)niceval);
}
long compat_sys_ioprio_get(u32 which, u32 who)
{
/* sign extend which and who */
return sys_ioprio_get((int)which, (int)who);
}
long compat_sys_ioprio_set(u32 which, u32 who, u32 ioprio)
{
/* sign extend which, who and ioprio */
return sys_ioprio_set((int)which, (int)who, (int)ioprio);
}
/* Note: it is necessary to treat newmask as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_ssetmask(u32 newmask)
{
return sys_ssetmask((int) newmask);
}
asmlinkage long compat_sys_syslog(u32 type, char __user * buf, u32 len)
{
/* sign extend len */
return sys_syslog(type, buf, (int)len);
}
/* Note: it is necessary to treat mask as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
* and the register representation of a signed int (msr in 64-bit mode) is performed.
*/
asmlinkage long compat_sys_umask(u32 mask)
{
return sys_umask((int)mask);
}
unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
unsigned long prot, unsigned long flags,
unsigned long fd, unsigned long pgoff)
@ -467,12 +172,6 @@ unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
}
long compat_sys_tgkill(u32 tgid, u32 pid, int sig)
{
/* sign extend tgid, pid */
return sys_tgkill((int)tgid, (int)pid, sig);
}
/*
* long long munging:
* The 32 bit ABI passes long longs in an odd even register pair.

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