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linux-user/s390x: Fix sigframe types 

Noticed via gitlab clang-user job:

  TEST    signals on s390x
../linux-user/s390x/signal.c:258:9: runtime error: \
  1.84467e+19 is outside the range of representable values of \
  type 'unsigned long'

Which points to the fact that we were performing a double-to-uint64_t
conversion while storing the fp registers, instead of just copying
the data across.

Turns out there are several errors:

target_ulong is the size of the target register, whereas abi_ulong
is the target 'unsigned long' type.  Not a big deal here, since we
only support 64-bit s390x, but not correct either.

In target_sigcontext and target ucontext, we used a host pointer
instead of a target pointer, aka abi_ulong.

Fixing this allows the removal of a cast to __put_user.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20210428193408.233706-2-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Richard Henderson 2021-04-28 12:33:54 -07:00 committed by Laurent Vivier
parent 4cce45df71
commit 5d79bd111f
1 changed files with 13 additions and 13 deletions
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26
linux-user/s390x/signal.c
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@ -37,13 +37,14 @@
typedef struct {
target_psw_t psw;
target_ulong gprs[__NUM_GPRS];
unsigned int acrs[__NUM_ACRS];
abi_ulong gprs[__NUM_GPRS];
abi_uint acrs[__NUM_ACRS];
} target_s390_regs_common;
typedef struct {
unsigned int fpc;
double fprs[__NUM_FPRS];
uint32_t fpc;
uint32_t pad;
uint64_t fprs[__NUM_FPRS];
} target_s390_fp_regs;
typedef struct {
@ -51,22 +52,22 @@ typedef struct {
target_s390_fp_regs fpregs;
} target_sigregs;
struct target_sigcontext {
target_ulong oldmask[_SIGCONTEXT_NSIG_WORDS];
target_sigregs *sregs;
};
typedef struct {
abi_ulong oldmask[_SIGCONTEXT_NSIG_WORDS];
abi_ulong sregs;
} target_sigcontext;
typedef struct {
uint8_t callee_used_stack[__SIGNAL_FRAMESIZE];
struct target_sigcontext sc;
target_sigcontext sc;
target_sigregs sregs;
int signo;
uint8_t retcode[S390_SYSCALL_SIZE];
} sigframe;
struct target_ucontext {
target_ulong tuc_flags;
struct target_ucontext *tuc_link;
abi_ulong tuc_flags;
abi_ulong tuc_link;
target_stack_t tuc_stack;
target_sigregs tuc_mcontext;
target_sigset_t tuc_sigmask; /* mask last for extensibility */
@ -143,8 +144,7 @@ void setup_frame(int sig, struct target_sigaction *ka,
save_sigregs(env, &frame->sregs);
__put_user((abi_ulong)(unsigned long)&frame->sregs,
(abi_ulong *)&frame->sc.sregs);
__put_user((abi_ulong)(unsigned long)&frame->sregs, &frame->sc.sregs);
/* Set up to return from userspace. If provided, use a stub
already in userspace. */