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linux-user/i386: Fix -mregparm=3 for signal delivery 

Since v2.6.19, the kernel has supported -mregparm=3.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2024-04-08 11:51:53 -10:00
parent 5cc77ebe9b
commit bae0455ce3
1 changed files with 11 additions and 13 deletions
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24
linux-user/i386/signal.c
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@ -405,8 +405,6 @@ void setup_frame(int sig, struct target_sigaction *ka,
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
goto give_sigsegv;
__put_user(sig, &frame->sig);
setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0],
frame_addr + offsetof(struct sigframe, fpstate));
@ -428,6 +426,13 @@ void setup_frame(int sig, struct target_sigaction *ka,
env->regs[R_ESP] = frame_addr;
env->eip = ka->_sa_handler;
/* Store argument for both -mregparm=3 and standard. */
env->regs[R_EAX] = sig;
__put_user(sig, &frame->sig);
/* The kernel clears EDX and ECX even though there is only one arg. */
env->regs[R_EDX] = 0;
env->regs[R_ECX] = 0;
cpu_x86_load_seg(env, R_DS, __USER_DS);
cpu_x86_load_seg(env, R_ES, __USER_DS);
cpu_x86_load_seg(env, R_SS, __USER_DS);
@ -449,9 +454,6 @@ void setup_rt_frame(int sig, struct target_sigaction *ka,
target_sigset_t *set, CPUX86State *env)
{
abi_ulong frame_addr;
#ifndef TARGET_X86_64
abi_ulong addr;
#endif
struct rt_sigframe *frame;
int i;
@ -461,14 +463,6 @@ void setup_rt_frame(int sig, struct target_sigaction *ka,
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0))
goto give_sigsegv;
/* These fields are only in rt_sigframe on 32 bit */
#ifndef TARGET_X86_64
__put_user(sig, &frame->sig);
addr = frame_addr + offsetof(struct rt_sigframe, info);
__put_user(addr, &frame->pinfo);
addr = frame_addr + offsetof(struct rt_sigframe, uc);
__put_user(addr, &frame->puc);
#endif
if (ka->sa_flags & TARGET_SA_SIGINFO) {
frame->info = *info;
}
@ -508,9 +502,13 @@ void setup_rt_frame(int sig, struct target_sigaction *ka,
env->eip = ka->_sa_handler;
#ifndef TARGET_X86_64
/* Store arguments for both -mregparm=3 and standard. */
env->regs[R_EAX] = sig;
__put_user(sig, &frame->sig);
env->regs[R_EDX] = frame_addr + offsetof(struct rt_sigframe, info);
__put_user(env->regs[R_EDX], &frame->pinfo);
env->regs[R_ECX] = frame_addr + offsetof(struct rt_sigframe, uc);
__put_user(env->regs[R_ECX], &frame->puc);
#else
env->regs[R_EAX] = 0;
env->regs[R_EDI] = sig;