diff options
Diffstat (limited to 'linux-user/signal.c')
| -rw-r--r-- | linux-user/signal.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/linux-user/signal.c b/linux-user/signal.c index 29529563ea..7365d5ddbf 100644 --- a/linux-user/signal.c +++ b/linux-user/signal.c @@ -4491,8 +4491,7 @@ static target_ulong get_sigframe(struct target_sigaction *ka, return newsp; } -static void save_user_regs(CPUPPCState *env, struct target_mcontext *frame, - int sigret) +static void save_user_regs(CPUPPCState *env, struct target_mcontext *frame) { target_ulong msr = env->msr; int i; @@ -4559,11 +4558,14 @@ static void save_user_regs(CPUPPCState *env, struct target_mcontext *frame, /* Store MSR. */ __put_user(msr, &frame->mc_gregs[TARGET_PT_MSR]); +} +static void encode_trampoline(int sigret, uint32_t *tramp) +{ /* Set up the sigreturn trampoline: li r0,sigret; sc. */ if (sigret) { - __put_user(0x38000000UL | sigret, &frame->tramp[0]); - __put_user(0x44000002UL, &frame->tramp[1]); + __put_user(0x38000000 | sigret, &tramp[0]); + __put_user(0x44000002, &tramp[1]); } } @@ -4674,7 +4676,10 @@ static void setup_frame(int sig, struct target_sigaction *ka, __put_user(sig, &sc->signal); /* Save user regs. */ - save_user_regs(env, &frame->mctx, TARGET_NR_sigreturn); + save_user_regs(env, &frame->mctx); + + /* Construct the trampoline code on the stack. */ + encode_trampoline(TARGET_NR_sigreturn, (uint32_t *)&frame->mctx.tramp); /* The kernel checks for the presence of a VDSO here. We don't emulate a vdso, so use a sigreturn system call. */ @@ -4740,7 +4745,8 @@ static void setup_rt_frame(int sig, struct target_sigaction *ka, } frame = &rt_sf->uc.tuc_mcontext; - save_user_regs(env, frame, TARGET_NR_rt_sigreturn); + save_user_regs(env, frame); + encode_trampoline(TARGET_NR_rt_sigreturn, (uint32_t *)&frame->tramp); /* The kernel checks for the presence of a VDSO here. We don't emulate a vdso, so use a sigreturn system call. */ |