[PATCH] uml: move libc-dependent startup and signal code
The serial UML OS-abstraction layer patch (um/kernel dir). This moves all systemcalls from process.c file under os-Linux dir and join process.c and process_kern.c files. Signed-off-by: Gennady Sharapov <gennady.v.sharapov@intel.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
parent
09ace81c1d
commit
60d339f6fe
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@ -153,6 +153,11 @@ extern int os_file_type(char *file);
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extern int os_file_mode(char *file, struct openflags *mode_out);
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extern int os_lock_file(int fd, int excl);
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/* start_up.c */
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extern void os_early_checks(void);
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extern int can_do_skas(void);
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/* process.c */
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extern unsigned long os_process_pc(int pid);
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extern int os_process_parent(int pid);
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extern void os_stop_process(int pid);
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@ -161,6 +166,9 @@ extern void os_kill_ptraced_process(int pid, int reap_child);
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extern void os_usr1_process(int pid);
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extern int os_getpid(void);
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extern int os_getpgrp(void);
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extern void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int));
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extern void init_new_thread_signals(int altstack);
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extern int run_kernel_thread(int (*fn)(void *), void *arg, void **jmp_ptr);
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extern int os_map_memory(void *virt, int fd, unsigned long long off,
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unsigned long len, int r, int w, int x);
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@ -170,6 +178,13 @@ extern int os_unmap_memory(void *addr, int len);
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extern void os_flush_stdout(void);
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extern unsigned long long os_usecs(void);
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/* tt.c
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* for tt mode only (will be deleted in future...)
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*/
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extern void forward_pending_sigio(int target);
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extern int start_fork_tramp(void *arg, unsigned long temp_stack,
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int clone_flags, int (*tramp)(void *));
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#endif
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/*
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@ -54,8 +54,6 @@ extern void stack_protections(unsigned long address);
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extern void task_protections(unsigned long address);
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extern int wait_for_stop(int pid, int sig, int cont_type, void *relay);
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extern void *add_signal_handler(int sig, void (*handler)(int));
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extern int start_fork_tramp(void *arg, unsigned long temp_stack,
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int clone_flags, int (*tramp)(void *));
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extern int linux_main(int argc, char **argv);
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extern void set_cmdline(char *cmd);
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extern void input_cb(void (*proc)(void *), void *arg, int arg_len);
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@ -64,8 +62,6 @@ extern void *um_kmalloc(int size);
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extern int switcheroo(int fd, int prot, void *from, void *to, int size);
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extern void setup_machinename(char *machine_out);
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extern void setup_hostinfo(void);
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extern void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int));
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extern void init_new_thread_signals(int altstack);
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extern void do_exec(int old_pid, int new_pid);
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extern void tracer_panic(char *msg, ...);
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extern char *get_umid(int only_if_set);
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@ -74,16 +70,12 @@ extern int detach(int pid, int sig);
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extern int attach(int pid);
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extern void kill_child_dead(int pid);
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extern int cont(int pid);
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extern void check_ptrace(void);
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extern void check_sigio(void);
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extern int run_kernel_thread(int (*fn)(void *), void *arg, void **jmp_ptr);
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extern void write_sigio_workaround(void);
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extern void arch_check_bugs(void);
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extern int cpu_feature(char *what, char *buf, int len);
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extern int arch_handle_signal(int sig, union uml_pt_regs *regs);
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extern int arch_fixup(unsigned long address, void *sc_ptr);
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extern void forward_pending_sigio(int target);
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extern int can_do_skas(void);
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extern void arch_init_thread(void);
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extern int setjmp_wrapper(void (*proc)(void *, void *), ...);
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extern int raw(int fd);
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@ -8,11 +8,10 @@ clean-files :=
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obj-y = config.o exec_kern.o exitcode.o \
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helper.o init_task.o irq.o irq_user.o ksyms.o main.o mem.o mem_user.o \
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physmem.o process.o process_kern.o ptrace.o reboot.o resource.o \
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sigio_user.o sigio_kern.o signal_kern.o signal_user.o smp.o \
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syscall_kern.o sysrq.o tempfile.o time.o time_kern.o \
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tlb.o trap_kern.o trap_user.o uaccess_user.o um_arch.o umid.o \
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user_util.o
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physmem.o process_kern.o ptrace.o reboot.o resource.o sigio_user.o \
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sigio_kern.o signal_kern.o signal_user.o smp.o syscall_kern.o sysrq.o \
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tempfile.o time.o time_kern.o tlb.o trap_kern.o trap_user.o \
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uaccess_user.o um_arch.o umid.o user_util.o
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obj-$(CONFIG_BLK_DEV_INITRD) += initrd.o
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obj-$(CONFIG_GPROF) += gprof_syms.o
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@ -25,8 +24,8 @@ obj-$(CONFIG_MODE_SKAS) += skas/
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user-objs-$(CONFIG_TTY_LOG) += tty_log.o
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USER_OBJS := $(user-objs-y) config.o helper.o main.o process.o tempfile.o \
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time.o tty_log.o umid.o user_util.o
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USER_OBJS := $(user-objs-y) config.o helper.o main.o tempfile.o time.o \
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tty_log.o umid.o user_util.o
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include arch/um/scripts/Makefile.rules
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@ -333,6 +333,7 @@ int linux_main(int argc, char **argv)
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if(have_root == 0)
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add_arg(DEFAULT_COMMAND_LINE);
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os_early_checks();
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mode_tt = force_tt ? 1 : !can_do_skas();
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#ifndef CONFIG_MODE_TT
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if (mode_tt) {
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@ -470,7 +471,6 @@ void __init setup_arch(char **cmdline_p)
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void __init check_bugs(void)
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{
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arch_check_bugs();
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check_ptrace();
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check_sigio();
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check_devanon();
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}
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@ -3,10 +3,11 @@
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# Licensed under the GPL
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#
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obj-y = aio.o elf_aux.o file.o process.o signal.o time.o tty.o user_syms.o \
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drivers/ sys-$(SUBARCH)/
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obj-y = aio.o elf_aux.o file.o process.o signal.o start_up.o time.o tt.o \
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tty.o user_syms.o drivers/ sys-$(SUBARCH)/
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USER_OBJS := aio.o elf_aux.o file.o process.o signal.o time.o tty.o
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USER_OBJS := aio.o elf_aux.o file.o process.o signal.o start_up.o time.o tt.o \
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tty.o
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CFLAGS_user_syms.o += -DSUBARCH_$(SUBARCH)
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@ -3,10 +3,10 @@
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* Licensed under the GPL
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*/
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#include <unistd.h>
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#include <stdio.h>
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#include <errno.h>
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#include <signal.h>
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#include <setjmp.h>
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#include <linux/unistd.h>
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#include <sys/mman.h>
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#include <sys/wait.h>
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@ -14,6 +14,10 @@
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#include "os.h"
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#include "user.h"
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#include "user_util.h"
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#include "signal_user.h"
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#include "process.h"
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#include "irq_user.h"
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#include "kern_util.h"
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#define ARBITRARY_ADDR -1
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#define FAILURE_PID -1
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@ -114,8 +118,10 @@ void os_usr1_process(int pid)
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kill(pid, SIGUSR1);
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}
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/*Don't use the glibc version, which caches the result in TLS. It misses some
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* syscalls, and also breaks with clone(), which does not unshare the TLS.*/
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/* Don't use the glibc version, which caches the result in TLS. It misses some
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* syscalls, and also breaks with clone(), which does not unshare the TLS.
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*/
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inline _syscall0(pid_t, getpid)
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int os_getpid(void)
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@ -164,6 +170,52 @@ int os_unmap_memory(void *addr, int len)
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return(0);
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}
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void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int))
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{
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int flags = 0, pages;
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if(sig_stack != NULL){
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pages = (1 << UML_CONFIG_KERNEL_STACK_ORDER);
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set_sigstack(sig_stack, pages * page_size());
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flags = SA_ONSTACK;
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}
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if(usr1_handler) set_handler(SIGUSR1, usr1_handler, flags, -1);
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}
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void init_new_thread_signals(int altstack)
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{
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int flags = altstack ? SA_ONSTACK : 0;
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set_handler(SIGSEGV, (__sighandler_t) sig_handler, flags,
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SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
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set_handler(SIGTRAP, (__sighandler_t) sig_handler, flags,
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SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
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set_handler(SIGFPE, (__sighandler_t) sig_handler, flags,
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SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
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set_handler(SIGILL, (__sighandler_t) sig_handler, flags,
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SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
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set_handler(SIGBUS, (__sighandler_t) sig_handler, flags,
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SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
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set_handler(SIGUSR2, (__sighandler_t) sig_handler,
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flags, SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
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signal(SIGHUP, SIG_IGN);
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init_irq_signals(altstack);
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}
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int run_kernel_thread(int (*fn)(void *), void *arg, void **jmp_ptr)
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{
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sigjmp_buf buf;
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int n;
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*jmp_ptr = &buf;
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n = sigsetjmp(buf, 1);
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if(n != 0)
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return(n);
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(*fn)(arg);
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return(0);
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}
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/*
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* Overrides for Emacs so that we follow Linus's tabbing style.
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* Emacs will notice this stuff at the end of the file and automatically
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@ -1,4 +1,4 @@
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/*
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/*
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* Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
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* Licensed under the GPL
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*/
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@ -19,7 +19,6 @@
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#include "user_util.h"
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#include "kern_util.h"
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#include "user.h"
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#include "process.h"
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#include "signal_kern.h"
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#include "signal_user.h"
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#include "sysdep/ptrace.h"
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#include "registers.h"
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#endif
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void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int))
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{
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int flags = 0, pages;
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if(sig_stack != NULL){
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pages = (1 << UML_CONFIG_KERNEL_STACK_ORDER);
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set_sigstack(sig_stack, pages * page_size());
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flags = SA_ONSTACK;
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}
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if(usr1_handler) set_handler(SIGUSR1, usr1_handler, flags, -1);
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}
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void init_new_thread_signals(int altstack)
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{
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int flags = altstack ? SA_ONSTACK : 0;
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set_handler(SIGSEGV, (__sighandler_t) sig_handler, flags,
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SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
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set_handler(SIGTRAP, (__sighandler_t) sig_handler, flags,
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SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
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set_handler(SIGFPE, (__sighandler_t) sig_handler, flags,
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SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
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set_handler(SIGILL, (__sighandler_t) sig_handler, flags,
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SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
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set_handler(SIGBUS, (__sighandler_t) sig_handler, flags,
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SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
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set_handler(SIGUSR2, (__sighandler_t) sig_handler,
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flags, SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
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signal(SIGHUP, SIG_IGN);
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init_irq_signals(altstack);
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}
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struct tramp {
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int (*tramp)(void *);
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void *tramp_data;
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unsigned long temp_stack;
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int flags;
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int pid;
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};
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/* See above for why sigkill is here */
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int sigkill = SIGKILL;
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int outer_tramp(void *arg)
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{
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struct tramp *t;
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int sig = sigkill;
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t = arg;
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t->pid = clone(t->tramp, (void *) t->temp_stack + page_size()/2,
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t->flags, t->tramp_data);
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if(t->pid > 0) wait_for_stop(t->pid, SIGSTOP, PTRACE_CONT, NULL);
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kill(os_getpid(), sig);
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_exit(0);
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}
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int start_fork_tramp(void *thread_arg, unsigned long temp_stack,
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int clone_flags, int (*tramp)(void *))
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{
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struct tramp arg;
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unsigned long sp;
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int new_pid, status, err;
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/* The trampoline will run on the temporary stack */
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sp = stack_sp(temp_stack);
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clone_flags |= CLONE_FILES | SIGCHLD;
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arg.tramp = tramp;
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arg.tramp_data = thread_arg;
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arg.temp_stack = temp_stack;
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arg.flags = clone_flags;
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/* Start the process and wait for it to kill itself */
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new_pid = clone(outer_tramp, (void *) sp, clone_flags, &arg);
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if(new_pid < 0)
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return(new_pid);
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CATCH_EINTR(err = waitpid(new_pid, &status, 0));
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if(err < 0)
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panic("Waiting for outer trampoline failed - errno = %d",
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errno);
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if(!WIFSIGNALED(status) || (WTERMSIG(status) != SIGKILL))
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panic("outer trampoline didn't exit with SIGKILL, "
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"status = %d", status);
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return(arg.pid);
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}
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static int ptrace_child(void *arg)
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{
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int ret;
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void *stack;
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unsigned long sp;
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int pid, n, status;
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stack = mmap(NULL, PAGE_SIZE, PROT_READ | PROT_WRITE | PROT_EXEC,
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MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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if(stack == MAP_FAILED)
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sp = (unsigned long) stack + PAGE_SIZE - sizeof(void *);
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pid = clone(ptrace_child, (void *) sp, SIGCHLD, NULL);
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if(pid < 0)
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panic("check_ptrace : clone failed, errno = %d", errno);
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panic("start_ptraced_child : clone failed, errno = %d", errno);
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CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED));
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if(n < 0)
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panic("check_ptrace : wait failed, errno = %d", errno);
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panic("check_ptrace : clone failed, errno = %d", errno);
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if(!WIFSTOPPED(status) || (WSTOPSIG(status) != SIGSTOP))
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panic("check_ptrace : expected SIGSTOP, got status = %d",
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status);
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@ -185,11 +92,14 @@ static int start_ptraced_child(void **stack_out)
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return(pid);
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}
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/* When testing for SYSEMU support, if it is one of the broken versions, we must
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* just avoid using sysemu, not panic, but only if SYSEMU features are broken.
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/* When testing for SYSEMU support, if it is one of the broken versions, we
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* must just avoid using sysemu, not panic, but only if SYSEMU features are
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* broken.
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* So only for SYSEMU features we test mustpanic, while normal host features
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* must work anyway!*/
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static int stop_ptraced_child(int pid, void *stack, int exitcode, int mustpanic)
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* must work anyway!
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*/
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static int stop_ptraced_child(int pid, void *stack, int exitcode,
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int mustpanic)
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{
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int status, n, ret = 0;
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@ -217,8 +127,6 @@ static int stop_ptraced_child(int pid, void *stack, int exitcode, int mustpanic)
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return ret;
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}
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static int force_sysemu_disabled = 0;
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int ptrace_faultinfo = 1;
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int proc_mm = 1;
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@ -228,24 +136,27 @@ static int __init skas0_cmd_param(char *str, int* add)
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return 0;
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}
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__uml_setup("skas0", skas0_cmd_param,
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"skas0\n"
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" Disables SKAS3 usage, so that SKAS0 is used, unless \n"
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" you specify mode=tt.\n\n");
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static int force_sysemu_disabled = 0;
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static int __init nosysemu_cmd_param(char *str, int* add)
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{
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force_sysemu_disabled = 1;
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return 0;
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}
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__uml_setup("skas0", skas0_cmd_param,
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"skas0\n"
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" Disables SKAS3 usage, so that SKAS0 is used, unless you \n"
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" specify mode=tt.\n\n");
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__uml_setup("nosysemu", nosysemu_cmd_param,
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||||
"nosysemu\n"
|
||||
" Turns off syscall emulation patch for ptrace (SYSEMU) on.\n"
|
||||
" SYSEMU is a performance-patch introduced by Laurent Vivier. It changes\n"
|
||||
" behaviour of ptrace() and helps reducing host context switch rate.\n"
|
||||
" To make it working, you need a kernel patch for your host, too.\n"
|
||||
" See http://perso.wanadoo.fr/laurent.vivier/UML/ for further information.\n\n");
|
||||
"nosysemu\n"
|
||||
" Turns off syscall emulation patch for ptrace (SYSEMU) on.\n"
|
||||
" SYSEMU is a performance-patch introduced by Laurent Vivier. It changes\n"
|
||||
" behaviour of ptrace() and helps reducing host context switch rate.\n"
|
||||
" To make it working, you need a kernel patch for your host, too.\n"
|
||||
" See http://perso.wanadoo.fr/laurent.vivier/UML/ for further \n"
|
||||
" information.\n\n");
|
||||
|
||||
static void __init check_sysemu(void)
|
||||
{
|
||||
|
@ -321,7 +232,7 @@ fail_stopped:
|
|||
printk("missing\n");
|
||||
}
|
||||
|
||||
void __init check_ptrace(void)
|
||||
static void __init check_ptrace(void)
|
||||
{
|
||||
void *stack;
|
||||
int pid, syscall, n, status;
|
||||
|
@ -329,12 +240,12 @@ void __init check_ptrace(void)
|
|||
printk("Checking that ptrace can change system call numbers...");
|
||||
pid = start_ptraced_child(&stack);
|
||||
|
||||
if (ptrace(PTRACE_OLDSETOPTIONS, pid, 0, (void *)PTRACE_O_TRACESYSGOOD) < 0)
|
||||
panic("check_ptrace: PTRACE_SETOPTIONS failed, errno = %d", errno);
|
||||
if(ptrace(PTRACE_OLDSETOPTIONS, pid, 0, (void *)PTRACE_O_TRACESYSGOOD) < 0)
|
||||
panic("check_ptrace: PTRACE_OLDSETOPTIONS failed, errno = %d", errno);
|
||||
|
||||
while(1){
|
||||
if(ptrace(PTRACE_SYSCALL, pid, 0, 0) < 0)
|
||||
panic("check_ptrace : ptrace failed, errno = %d",
|
||||
panic("check_ptrace : ptrace failed, errno = %d",
|
||||
errno);
|
||||
CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED));
|
||||
if(n < 0)
|
||||
|
@ -342,7 +253,7 @@ void __init check_ptrace(void)
|
|||
if(!WIFSTOPPED(status) || (WSTOPSIG(status) != SIGTRAP + 0x80))
|
||||
panic("check_ptrace : expected SIGTRAP + 0x80, "
|
||||
"got status = %d", status);
|
||||
|
||||
|
||||
syscall = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_NR_OFFSET,
|
||||
0);
|
||||
if(syscall == __NR_getpid){
|
||||
|
@ -359,33 +270,12 @@ void __init check_ptrace(void)
|
|||
check_sysemu();
|
||||
}
|
||||
|
||||
int run_kernel_thread(int (*fn)(void *), void *arg, void **jmp_ptr)
|
||||
void os_early_checks(void)
|
||||
{
|
||||
sigjmp_buf buf;
|
||||
int n;
|
||||
|
||||
*jmp_ptr = &buf;
|
||||
n = sigsetjmp(buf, 1);
|
||||
if(n != 0)
|
||||
return(n);
|
||||
(*fn)(arg);
|
||||
return(0);
|
||||
check_ptrace();
|
||||
}
|
||||
|
||||
void forward_pending_sigio(int target)
|
||||
{
|
||||
sigset_t sigs;
|
||||
|
||||
if(sigpending(&sigs))
|
||||
panic("forward_pending_sigio : sigpending failed");
|
||||
if(sigismember(&sigs, SIGIO))
|
||||
kill(target, SIGIO);
|
||||
}
|
||||
|
||||
extern void *__syscall_stub_start, __syscall_stub_end;
|
||||
|
||||
#ifdef UML_CONFIG_MODE_SKAS
|
||||
|
||||
static inline void check_skas3_ptrace_support(void)
|
||||
{
|
||||
struct ptrace_faultinfo fi;
|
||||
|
@ -400,9 +290,8 @@ static inline void check_skas3_ptrace_support(void)
|
|||
ptrace_faultinfo = 0;
|
||||
if(errno == EIO)
|
||||
printf("not found\n");
|
||||
else {
|
||||
else
|
||||
perror("not found");
|
||||
}
|
||||
}
|
||||
else {
|
||||
if (!ptrace_faultinfo)
|
||||
|
@ -419,9 +308,10 @@ int can_do_skas(void)
|
|||
{
|
||||
printf("Checking for /proc/mm...");
|
||||
if (os_access("/proc/mm", OS_ACC_W_OK) < 0) {
|
||||
proc_mm = 0;
|
||||
proc_mm = 0;
|
||||
printf("not found\n");
|
||||
} else {
|
||||
}
|
||||
else {
|
||||
if (!proc_mm)
|
||||
printf("found but disabled on command line\n");
|
||||
else
|
|
@ -0,0 +1,113 @@
|
|||
/*
|
||||
* Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
|
||||
* Licensed under the GPL
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <unistd.h>
|
||||
#include <signal.h>
|
||||
#include <sched.h>
|
||||
#include <errno.h>
|
||||
#include <stdarg.h>
|
||||
#include <stdlib.h>
|
||||
#include <setjmp.h>
|
||||
#include <sys/time.h>
|
||||
#include <sys/ptrace.h>
|
||||
#include <linux/ptrace.h>
|
||||
#include <sys/wait.h>
|
||||
#include <sys/mman.h>
|
||||
#include <asm/ptrace.h>
|
||||
#include <asm/unistd.h>
|
||||
#include <asm/page.h>
|
||||
#include "user_util.h"
|
||||
#include "kern_util.h"
|
||||
#include "user.h"
|
||||
#include "signal_kern.h"
|
||||
#include "signal_user.h"
|
||||
#include "sysdep/ptrace.h"
|
||||
#include "sysdep/sigcontext.h"
|
||||
#include "irq_user.h"
|
||||
#include "ptrace_user.h"
|
||||
#include "time_user.h"
|
||||
#include "init.h"
|
||||
#include "os.h"
|
||||
#include "uml-config.h"
|
||||
#include "choose-mode.h"
|
||||
#include "mode.h"
|
||||
#include "tempfile.h"
|
||||
|
||||
/*
|
||||
*-------------------------
|
||||
* only for tt mode (will be deleted in future...)
|
||||
*-------------------------
|
||||
*/
|
||||
|
||||
struct tramp {
|
||||
int (*tramp)(void *);
|
||||
void *tramp_data;
|
||||
unsigned long temp_stack;
|
||||
int flags;
|
||||
int pid;
|
||||
};
|
||||
|
||||
/* See above for why sigkill is here */
|
||||
|
||||
int sigkill = SIGKILL;
|
||||
|
||||
int outer_tramp(void *arg)
|
||||
{
|
||||
struct tramp *t;
|
||||
int sig = sigkill;
|
||||
|
||||
t = arg;
|
||||
t->pid = clone(t->tramp, (void *) t->temp_stack + page_size()/2,
|
||||
t->flags, t->tramp_data);
|
||||
if(t->pid > 0) wait_for_stop(t->pid, SIGSTOP, PTRACE_CONT, NULL);
|
||||
kill(os_getpid(), sig);
|
||||
_exit(0);
|
||||
}
|
||||
|
||||
int start_fork_tramp(void *thread_arg, unsigned long temp_stack,
|
||||
int clone_flags, int (*tramp)(void *))
|
||||
{
|
||||
struct tramp arg;
|
||||
unsigned long sp;
|
||||
int new_pid, status, err;
|
||||
|
||||
/* The trampoline will run on the temporary stack */
|
||||
sp = stack_sp(temp_stack);
|
||||
|
||||
clone_flags |= CLONE_FILES | SIGCHLD;
|
||||
|
||||
arg.tramp = tramp;
|
||||
arg.tramp_data = thread_arg;
|
||||
arg.temp_stack = temp_stack;
|
||||
arg.flags = clone_flags;
|
||||
|
||||
/* Start the process and wait for it to kill itself */
|
||||
new_pid = clone(outer_tramp, (void *) sp, clone_flags, &arg);
|
||||
if(new_pid < 0)
|
||||
return(new_pid);
|
||||
|
||||
CATCH_EINTR(err = waitpid(new_pid, &status, 0));
|
||||
if(err < 0)
|
||||
panic("Waiting for outer trampoline failed - errno = %d",
|
||||
errno);
|
||||
|
||||
if(!WIFSIGNALED(status) || (WTERMSIG(status) != SIGKILL))
|
||||
panic("outer trampoline didn't exit with SIGKILL, "
|
||||
"status = %d", status);
|
||||
|
||||
return(arg.pid);
|
||||
}
|
||||
|
||||
void forward_pending_sigio(int target)
|
||||
{
|
||||
sigset_t sigs;
|
||||
|
||||
if(sigpending(&sigs))
|
||||
panic("forward_pending_sigio : sigpending failed");
|
||||
if(sigismember(&sigs, SIGIO))
|
||||
kill(target, SIGIO);
|
||||
}
|
||||
|
Loading…
Reference in New Issue