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linux-user/i386: Return boolean success from restore_sigcontext

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Invert the sense of the return value and use bool.

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2024-04-08 13:07:54 -10:00
parent bae0455ce3
commit c536f9b77c
1 changed files with 25 additions and 26 deletions
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51
linux-user/i386/signal.c
View file

@ -564,12 +564,12 @@ static int xrstor_sigcontext(CPUX86State *env, X86LegacyXSaveArea *fxsave,
return 0;
}
static int
restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc)
static bool restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc)
{
int err = 1;
abi_ulong fpstate_addr;
unsigned int tmpflags;
struct target_fpstate *fpstate;
bool ok;
#ifndef TARGET_X86_64
cpu_x86_load_seg(env, R_GS, tswap16(sc->gs));
@ -617,29 +617,27 @@ restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc)
// regs->orig_eax = -1; /* disable syscall checks */
fpstate_addr = tswapl(sc->fpstate);
if (fpstate_addr != 0) {
struct target_fpstate *fpstate;
if (!lock_user_struct(VERIFY_READ, fpstate, fpstate_addr,
sizeof(struct target_fpstate))) {
return err;
}
#ifndef TARGET_X86_64
if (!(env->features[FEAT_1_EDX] & CPUID_FXSR)) {
cpu_x86_frstor(env, fpstate_addr, 1);
err = 0;
} else {
err = xrstor_sigcontext(env, &fpstate->fxstate,
fpstate_addr + TARGET_FPSTATE_FXSAVE_OFFSET);
}
#else
err = xrstor_sigcontext(env, fpstate, fpstate_addr);
#endif
unlock_user_struct(fpstate, fpstate_addr, 0);
} else {
err = 0;
if (fpstate_addr == 0) {
return true;
}
if (!lock_user_struct(VERIFY_READ, fpstate, fpstate_addr,
sizeof(struct target_fpstate))) {
return false;
}
#ifndef TARGET_X86_64
if (!(env->features[FEAT_1_EDX] & CPUID_FXSR)) {
cpu_x86_frstor(env, fpstate_addr, 1);
ok = true;
} else {
ok = !xrstor_sigcontext(env, &fpstate->fxstate,
fpstate_addr + TARGET_FPSTATE_FXSAVE_OFFSET);
}
#else
ok = !xrstor_sigcontext(env, fpstate, fpstate_addr);
#endif
unlock_user_struct(fpstate, fpstate_addr, 0);
return err;
return ok;
}
/* Note: there is no sigreturn on x86_64, there is only rt_sigreturn */
@ -665,8 +663,9 @@ long do_sigreturn(CPUX86State *env)
set_sigmask(&set);
/* restore registers */
if (restore_sigcontext(env, &frame->sc))
if (!restore_sigcontext(env, &frame->sc)) {
goto badframe;
}
unlock_user_struct(frame, frame_addr, 0);
return -QEMU_ESIGRETURN;
@ -690,7 +689,7 @@ long do_rt_sigreturn(CPUX86State *env)
target_to_host_sigset(&set, &frame->uc.tuc_sigmask);
set_sigmask(&set);
if (restore_sigcontext(env, &frame->uc.tuc_mcontext)) {
if (!restore_sigcontext(env, &frame->uc.tuc_mcontext)) {
goto badframe;
}