diff options
Diffstat (limited to 'linux-user/sparc/signal.c')
| -rw-r--r-- | linux-user/sparc/signal.c | 123 |
1 files changed, 65 insertions, 58 deletions
diff --git a/linux-user/sparc/signal.c b/linux-user/sparc/signal.c index 3474098641..0d9305818f 100644 --- a/linux-user/sparc/signal.c +++ b/linux-user/sparc/signal.c @@ -44,17 +44,6 @@ struct target_stackf { }; typedef struct { - struct { - abi_ulong psr; - abi_ulong pc; - abi_ulong npc; - abi_ulong y; - abi_ulong u_regs[16]; /* globals and ins */ - } si_regs; - int si_mask; -} __siginfo_t; - -typedef struct { abi_ulong si_float_regs[32]; unsigned long si_fsr; unsigned long si_fpqdepth; @@ -67,7 +56,8 @@ typedef struct { struct target_signal_frame { struct target_stackf ss; - __siginfo_t info; + struct target_pt_regs regs; + uint32_t si_mask; abi_ulong fpu_save; uint32_t insns[2] QEMU_ALIGNED(8); abi_ulong extramask[TARGET_NSIG_WORDS - 1]; @@ -103,23 +93,61 @@ static inline abi_ulong get_sigframe(struct target_sigaction *sa, return sp; } -static int -setup___siginfo(__siginfo_t *si, CPUSPARCState *env, abi_ulong mask) +static void save_pt_regs(struct target_pt_regs *regs, CPUSPARCState *env) { - int err = 0, i; - - __put_user(env->psr, &si->si_regs.psr); - __put_user(env->pc, &si->si_regs.pc); - __put_user(env->npc, &si->si_regs.npc); - __put_user(env->y, &si->si_regs.y); - for (i=0; i < 8; i++) { - __put_user(env->gregs[i], &si->si_regs.u_regs[i]); + int i; + +#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) + __put_user(sparc64_tstate(env), ®s->tstate); + /* TODO: magic should contain PT_REG_MAGIC + %tt. */ + __put_user(0, ®s->magic); +#else + __put_user(cpu_get_psr(env), ®s->psr); +#endif + + __put_user(env->pc, ®s->pc); + __put_user(env->npc, ®s->npc); + __put_user(env->y, ®s->y); + + for (i = 0; i < 8; i++) { + __put_user(env->gregs[i], ®s->u_regs[i]); } - for (i=0; i < 8; i++) { - __put_user(env->regwptr[WREG_O0 + i], &si->si_regs.u_regs[i + 8]); + for (i = 0; i < 8; i++) { + __put_user(env->regwptr[WREG_O0 + i], ®s->u_regs[i + 8]); + } +} + +static void restore_pt_regs(struct target_pt_regs *regs, CPUSPARCState *env) +{ + int i; + +#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) + /* User can only change condition codes and %asi in %tstate. */ + uint64_t tstate; + __get_user(tstate, ®s->tstate); + cpu_put_ccr(env, tstate >> 32); + env->asi = extract64(tstate, 24, 8); +#else + /* + * User can only change condition codes and FPU enabling in %psr. + * But don't bother with FPU enabling, since a real kernel would + * just re-enable the FPU upon the next fpu trap. + */ + uint32_t psr; + __get_user(psr, ®s->psr); + env->psr = (psr & PSR_ICC) | (env->psr & ~PSR_ICC); +#endif + + /* Note that pc and npc are handled in the caller. */ + + __get_user(env->y, ®s->y); + + for (i = 0; i < 8; i++) { + __get_user(env->gregs[i], ®s->u_regs[i]); + } + for (i = 0; i < 8; i++) { + __get_user(env->regwptr[WREG_O0 + i], ®s->u_regs[i + 8]); } - __put_user(mask, &si->si_mask); - return err; } #define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7))) @@ -129,7 +157,7 @@ void setup_frame(int sig, struct target_sigaction *ka, { abi_ulong sf_addr; struct target_signal_frame *sf; - int sigframe_size, err, i; + int sigframe_size, i; /* 1. Make sure everything is clean */ //synchronize_user_stack(); @@ -143,18 +171,14 @@ void setup_frame(int sig, struct target_sigaction *ka, if (!sf) { goto sigsegv; } -#if 0 - if (invalid_frame_pointer(sf, sigframe_size)) - goto sigill_and_return; -#endif /* 2. Save the current process state */ - err = setup___siginfo(&sf->info, env, set->sig[0]); + save_pt_regs(&sf->regs, env); __put_user(0, &sf->extra_size); //save_fpu_state(regs, &sf->fpu_state); //__put_user(&sf->fpu_state, &sf->fpu_save); - __put_user(set->sig[0], &sf->info.si_mask); + __put_user(set->sig[0], &sf->si_mask); for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) { __put_user(set->sig[i + 1], &sf->extramask[i]); } @@ -165,16 +189,14 @@ void setup_frame(int sig, struct target_sigaction *ka, for (i = 0; i < 8; i++) { __put_user(env->regwptr[i + WREG_I0], &sf->ss.win.ins[i]); } - if (err) - goto sigsegv; /* 3. signal handler back-trampoline and parameters */ env->regwptr[WREG_SP] = sf_addr; env->regwptr[WREG_O0] = sig; env->regwptr[WREG_O1] = sf_addr + - offsetof(struct target_signal_frame, info); + offsetof(struct target_signal_frame, regs); env->regwptr[WREG_O2] = sf_addr + - offsetof(struct target_signal_frame, info); + offsetof(struct target_signal_frame, regs); /* 4. signal handler */ env->pc = ka->_sa_handler; @@ -218,7 +240,7 @@ long do_sigreturn(CPUSPARCState *env) { abi_ulong sf_addr; struct target_signal_frame *sf; - abi_ulong up_psr, pc, npc; + abi_ulong pc, npc; target_sigset_t set; sigset_t host_set; int i; @@ -234,29 +256,17 @@ long do_sigreturn(CPUSPARCState *env) if (sf_addr & 3) goto segv_and_exit; - __get_user(pc, &sf->info.si_regs.pc); - __get_user(npc, &sf->info.si_regs.npc); + __get_user(pc, &sf->regs.pc); + __get_user(npc, &sf->regs.npc); if ((pc | npc) & 3) { goto segv_and_exit; } /* 2. Restore the state */ - __get_user(up_psr, &sf->info.si_regs.psr); - - /* User can only change condition codes and FPU enabling in %psr. */ - env->psr = (up_psr & (PSR_ICC /* | PSR_EF */)) - | (env->psr & ~(PSR_ICC /* | PSR_EF */)); - + restore_pt_regs(&sf->regs, env); env->pc = pc; env->npc = npc; - __get_user(env->y, &sf->info.si_regs.y); - for (i=0; i < 8; i++) { - __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]); - } - for (i=0; i < 8; i++) { - __get_user(env->regwptr[i + WREG_O0], &sf->info.si_regs.u_regs[i + 8]); - } /* FIXME: implement FPU save/restore: * __get_user(fpu_save, &sf->fpu_save); @@ -267,11 +277,8 @@ long do_sigreturn(CPUSPARCState *env) * } */ - /* This is pretty much atomic, no amount locking would prevent - * the races which exist anyways. - */ - __get_user(set.sig[0], &sf->info.si_mask); - for(i = 1; i < TARGET_NSIG_WORDS; i++) { + __get_user(set.sig[0], &sf->si_mask); + for (i = 1; i < TARGET_NSIG_WORDS; i++) { __get_user(set.sig[i], &sf->extramask[i - 1]); } |