diff options
Diffstat (limited to 'linux-user/signal.c')
| -rw-r--r-- | linux-user/signal.c | 4623 |
1 files changed, 6 insertions, 4617 deletions
diff --git a/linux-user/signal.c b/linux-user/signal.c index ded12caa18..2f2aa89feb 100644 --- a/linux-user/signal.c +++ b/linux-user/signal.c @@ -28,11 +28,12 @@ #include "qemu.h" #include "qemu-common.h" +#include "signal-common.h" #include "target_signal.h" //#define DEBUG_SIGNAL -static struct target_sigaltstack target_sigaltstack_used = { +struct target_sigaltstack target_sigaltstack_used = { .ss_sp = 0, .ss_size = 0, .ss_flags = TARGET_SS_DISABLE, @@ -88,18 +89,6 @@ static uint8_t host_to_target_signal_table[_NSIG] = { }; static uint8_t target_to_host_signal_table[_NSIG]; -static inline int on_sig_stack(unsigned long sp) -{ - return (sp - target_sigaltstack_used.ss_sp - < target_sigaltstack_used.ss_size); -} - -static inline int sas_ss_flags(unsigned long sp) -{ - return (target_sigaltstack_used.ss_size == 0 ? SS_DISABLE - : on_sig_stack(sp) ? SS_ONSTACK : 0); -} - int host_to_target_signal(int sig) { if (sig >= _NSIG) @@ -114,11 +103,6 @@ int target_to_host_signal(int sig) return target_to_host_signal_table[sig]; } -static inline void target_sigemptyset(target_sigset_t *set) -{ - memset(set, 0, sizeof(*set)); -} - static inline void target_sigaddset(target_sigset_t *set, int signum) { signum--; @@ -155,8 +139,7 @@ void host_to_target_sigset(target_sigset_t *d, const sigset_t *s) d->sig[i] = tswapal(d1.sig[i]); } -static void target_to_host_sigset_internal(sigset_t *d, - const target_sigset_t *s) +void target_to_host_sigset_internal(sigset_t *d, const target_sigset_t *s) { int i; sigemptyset(d); @@ -223,8 +206,8 @@ static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo, } } -static void tswap_siginfo(target_siginfo_t *tinfo, - const target_siginfo_t *info) +void tswap_siginfo(target_siginfo_t *tinfo, + const target_siginfo_t *info) { int sig; sig = info->si_signo; @@ -365,7 +348,7 @@ static inline void free_sigqueue(CPUState *env, struct sigqueue *q) } /* abort execution with signal */ -static void QEMU_NORETURN force_sig(int target_sig) +void QEMU_NORETURN force_sig(int target_sig) { TaskState *ts = (TaskState *)thread_env->opaque; int host_sig, core_dumped = 0; @@ -628,4602 +611,8 @@ int do_sigaction(int sig, const struct target_sigaction *act, return ret; } -static inline int copy_siginfo_to_user(target_siginfo_t *tinfo, - const target_siginfo_t *info) -{ - tswap_siginfo(tinfo, info); - return 0; -} - -static inline int current_exec_domain_sig(int sig) -{ - return /* current->exec_domain && current->exec_domain->signal_invmap - && sig < 32 ? current->exec_domain->signal_invmap[sig] : */ sig; -} - -#if defined(TARGET_I386) && TARGET_ABI_BITS == 32 - -/* from the Linux kernel */ - -struct target_fpreg { - uint16_t significand[4]; - uint16_t exponent; -}; - -struct target_fpxreg { - uint16_t significand[4]; - uint16_t exponent; - uint16_t padding[3]; -}; - -struct target_xmmreg { - abi_ulong element[4]; -}; - -struct target_fpstate { - /* Regular FPU environment */ - abi_ulong cw; - abi_ulong sw; - abi_ulong tag; - abi_ulong ipoff; - abi_ulong cssel; - abi_ulong dataoff; - abi_ulong datasel; - struct target_fpreg _st[8]; - uint16_t status; - uint16_t magic; /* 0xffff = regular FPU data only */ - - /* FXSR FPU environment */ - abi_ulong _fxsr_env[6]; /* FXSR FPU env is ignored */ - abi_ulong mxcsr; - abi_ulong reserved; - struct target_fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */ - struct target_xmmreg _xmm[8]; - abi_ulong padding[56]; -}; - -#define X86_FXSR_MAGIC 0x0000 - -struct target_sigcontext { - uint16_t gs, __gsh; - uint16_t fs, __fsh; - uint16_t es, __esh; - uint16_t ds, __dsh; - abi_ulong edi; - abi_ulong esi; - abi_ulong ebp; - abi_ulong esp; - abi_ulong ebx; - abi_ulong edx; - abi_ulong ecx; - abi_ulong eax; - abi_ulong trapno; - abi_ulong err; - abi_ulong eip; - uint16_t cs, __csh; - abi_ulong eflags; - abi_ulong esp_at_signal; - uint16_t ss, __ssh; - abi_ulong fpstate; /* pointer */ - abi_ulong oldmask; - abi_ulong cr2; -}; - -struct target_ucontext { - abi_ulong tuc_flags; - abi_ulong tuc_link; - target_stack_t tuc_stack; - struct target_sigcontext tuc_mcontext; - target_sigset_t tuc_sigmask; /* mask last for extensibility */ -}; - -struct sigframe -{ - abi_ulong pretcode; - int sig; - struct target_sigcontext sc; - struct target_fpstate fpstate; - abi_ulong extramask[TARGET_NSIG_WORDS-1]; - char retcode[8]; -}; - -struct rt_sigframe -{ - abi_ulong pretcode; - int sig; - abi_ulong pinfo; - abi_ulong puc; - struct target_siginfo info; - struct target_ucontext uc; - struct target_fpstate fpstate; - char retcode[8]; -}; - -/* - * Set up a signal frame. - */ - -/* XXX: save x87 state */ -static int -setup_sigcontext(struct target_sigcontext *sc, struct target_fpstate *fpstate, - CPUX86State *env, abi_ulong mask, abi_ulong fpstate_addr) -{ - int err = 0; - uint16_t magic; - - /* already locked in setup_frame() */ - err |= __put_user(env->segs[R_GS].selector, (unsigned int *)&sc->gs); - err |= __put_user(env->segs[R_FS].selector, (unsigned int *)&sc->fs); - err |= __put_user(env->segs[R_ES].selector, (unsigned int *)&sc->es); - err |= __put_user(env->segs[R_DS].selector, (unsigned int *)&sc->ds); - err |= __put_user(env->regs[R_EDI], &sc->edi); - err |= __put_user(env->regs[R_ESI], &sc->esi); - err |= __put_user(env->regs[R_EBP], &sc->ebp); - err |= __put_user(env->regs[R_ESP], &sc->esp); - err |= __put_user(env->regs[R_EBX], &sc->ebx); - err |= __put_user(env->regs[R_EDX], &sc->edx); - err |= __put_user(env->regs[R_ECX], &sc->ecx); - err |= __put_user(env->regs[R_EAX], &sc->eax); - err |= __put_user(env->exception_index, &sc->trapno); - err |= __put_user(env->error_code, &sc->err); - err |= __put_user(env->eip, &sc->eip); - err |= __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs); - err |= __put_user(env->eflags, &sc->eflags); - err |= __put_user(env->regs[R_ESP], &sc->esp_at_signal); - err |= __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss); - - cpu_x86_fsave(env, fpstate_addr, 1); - fpstate->status = fpstate->sw; - magic = 0xffff; - err |= __put_user(magic, &fpstate->magic); - err |= __put_user(fpstate_addr, &sc->fpstate); - - /* non-iBCS2 extensions.. */ - err |= __put_user(mask, &sc->oldmask); - err |= __put_user(env->cr[2], &sc->cr2); - return err; -} - -/* - * Determine which stack to use.. - */ - -static inline abi_ulong -get_sigframe(struct target_sigaction *ka, CPUX86State *env, size_t frame_size) -{ - unsigned long esp; - - /* Default to using normal stack */ - esp = env->regs[R_ESP]; - /* This is the X/Open sanctioned signal stack switching. */ - if (ka->sa_flags & TARGET_SA_ONSTACK) { - if (sas_ss_flags(esp) == 0) - esp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; - } - - /* This is the legacy signal stack switching. */ - else - if ((env->segs[R_SS].selector & 0xffff) != __USER_DS && - !(ka->sa_flags & TARGET_SA_RESTORER) && - ka->sa_restorer) { - esp = (unsigned long) ka->sa_restorer; - } - return (esp - frame_size) & -8ul; -} - -/* compare linux/arch/i386/kernel/signal.c:setup_frame() */ -static void setup_frame(int sig, struct target_sigaction *ka, - target_sigset_t *set, CPUX86State *env) -{ - abi_ulong frame_addr; - struct sigframe *frame; - int i, err = 0; - - frame_addr = get_sigframe(ka, env, sizeof(*frame)); - - if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) - goto give_sigsegv; - - err |= __put_user(current_exec_domain_sig(sig), - &frame->sig); - if (err) - goto give_sigsegv; - - setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0], - frame_addr + offsetof(struct sigframe, fpstate)); - if (err) - goto give_sigsegv; - - for(i = 1; i < TARGET_NSIG_WORDS; i++) { - if (__put_user(set->sig[i], &frame->extramask[i - 1])) - goto give_sigsegv; - } - - /* Set up to return from userspace. If provided, use a stub - already in userspace. */ - if (ka->sa_flags & TARGET_SA_RESTORER) { - err |= __put_user(ka->sa_restorer, &frame->pretcode); - } else { - uint16_t val16; - abi_ulong retcode_addr; - retcode_addr = frame_addr + offsetof(struct sigframe, retcode); - err |= __put_user(retcode_addr, &frame->pretcode); - /* This is popl %eax ; movl $,%eax ; int $0x80 */ - val16 = 0xb858; - err |= __put_user(val16, (uint16_t *)(frame->retcode+0)); - err |= __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2)); - val16 = 0x80cd; - err |= __put_user(val16, (uint16_t *)(frame->retcode+6)); - } - - if (err) - goto give_sigsegv; - - /* Set up registers for signal handler */ - env->regs[R_ESP] = frame_addr; - env->eip = ka->_sa_handler; - - 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); - cpu_x86_load_seg(env, R_CS, __USER_CS); - env->eflags &= ~TF_MASK; - - unlock_user_struct(frame, frame_addr, 1); - - return; - -give_sigsegv: - unlock_user_struct(frame, frame_addr, 1); - if (sig == TARGET_SIGSEGV) - ka->_sa_handler = TARGET_SIG_DFL; - force_sig(TARGET_SIGSEGV /* , current */); -} - -/* compare linux/arch/i386/kernel/signal.c:setup_rt_frame() */ -static void setup_rt_frame(int sig, struct target_sigaction *ka, - target_siginfo_t *info, - target_sigset_t *set, CPUX86State *env) -{ - abi_ulong frame_addr, addr; - struct rt_sigframe *frame; - int i, err = 0; - - frame_addr = get_sigframe(ka, env, sizeof(*frame)); - - if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) - goto give_sigsegv; - - err |= __put_user(current_exec_domain_sig(sig), - &frame->sig); - addr = frame_addr + offsetof(struct rt_sigframe, info); - err |= __put_user(addr, &frame->pinfo); - addr = frame_addr + offsetof(struct rt_sigframe, uc); - err |= __put_user(addr, &frame->puc); - err |= copy_siginfo_to_user(&frame->info, info); - if (err) - goto give_sigsegv; - - /* Create the ucontext. */ - err |= __put_user(0, &frame->uc.tuc_flags); - err |= __put_user(0, &frame->uc.tuc_link); - err |= __put_user(target_sigaltstack_used.ss_sp, - &frame->uc.tuc_stack.ss_sp); - err |= __put_user(sas_ss_flags(get_sp_from_cpustate(env)), - &frame->uc.tuc_stack.ss_flags); - err |= __put_user(target_sigaltstack_used.ss_size, - &frame->uc.tuc_stack.ss_size); - err |= setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate, - env, set->sig[0], - frame_addr + offsetof(struct rt_sigframe, fpstate)); - for(i = 0; i < TARGET_NSIG_WORDS; i++) { - if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i])) - goto give_sigsegv; - } - - /* Set up to return from userspace. If provided, use a stub - already in userspace. */ - if (ka->sa_flags & TARGET_SA_RESTORER) { - err |= __put_user(ka->sa_restorer, &frame->pretcode); - } else { - uint16_t val16; - addr = frame_addr + offsetof(struct rt_sigframe, retcode); - err |= __put_user(addr, &frame->pretcode); - /* This is movl $,%eax ; int $0x80 */ - err |= __put_user(0xb8, (char *)(frame->retcode+0)); - err |= __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1)); - val16 = 0x80cd; - err |= __put_user(val16, (uint16_t *)(frame->retcode+5)); - } - - if (err) - goto give_sigsegv; - - /* Set up registers for signal handler */ - env->regs[R_ESP] = frame_addr; - env->eip = ka->_sa_handler; - - 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); - cpu_x86_load_seg(env, R_CS, __USER_CS); - env->eflags &= ~TF_MASK; - - unlock_user_struct(frame, frame_addr, 1); - - return; - -give_sigsegv: - unlock_user_struct(frame, frame_addr, 1); - if (sig == TARGET_SIGSEGV) - ka->_sa_handler = TARGET_SIG_DFL; - force_sig(TARGET_SIGSEGV /* , current */); -} - -static int -restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc, int *peax) -{ - unsigned int err = 0; - abi_ulong fpstate_addr; - unsigned int tmpflags; - - cpu_x86_load_seg(env, R_GS, tswap16(sc->gs)); - cpu_x86_load_seg(env, R_FS, tswap16(sc->fs)); - cpu_x86_load_seg(env, R_ES, tswap16(sc->es)); - cpu_x86_load_seg(env, R_DS, tswap16(sc->ds)); - - env->regs[R_EDI] = tswapl(sc->edi); - env->regs[R_ESI] = tswapl(sc->esi); - env->regs[R_EBP] = tswapl(sc->ebp); - env->regs[R_ESP] = tswapl(sc->esp); - env->regs[R_EBX] = tswapl(sc->ebx); - env->regs[R_EDX] = tswapl(sc->edx); - env->regs[R_ECX] = tswapl(sc->ecx); - env->eip = tswapl(sc->eip); - - cpu_x86_load_seg(env, R_CS, lduw_p(&sc->cs) | 3); - cpu_x86_load_seg(env, R_SS, lduw_p(&sc->ss) | 3); - - tmpflags = tswapl(sc->eflags); - env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5); - // regs->orig_eax = -1; /* disable syscall checks */ - - fpstate_addr = tswapl(sc->fpstate); - if (fpstate_addr != 0) { - if (!access_ok(VERIFY_READ, fpstate_addr, - sizeof(struct target_fpstate))) - goto badframe; - cpu_x86_frstor(env, fpstate_addr, 1); - } - - *peax = tswapl(sc->eax); - return err; -badframe: - return 1; -} - -long do_sigreturn(CPUX86State *env) -{ - struct sigframe *frame; - abi_ulong frame_addr = env->regs[R_ESP] - 8; - target_sigset_t target_set; - sigset_t set; - int eax, i; - -#if defined(DEBUG_SIGNAL) - fprintf(stderr, "do_sigreturn\n"); -#endif - if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) - goto badframe; - /* set blocked signals */ - if (__get_user(target_set.sig[0], &frame->sc.oldmask)) - goto badframe; - for(i = 1; i < TARGET_NSIG_WORDS; i++) { - if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) - goto badframe; - } - - target_to_host_sigset_internal(&set, &target_set); - sigprocmask(SIG_SETMASK, &set, NULL); - - /* restore registers */ - if (restore_sigcontext(env, &frame->sc, &eax)) - goto badframe; - unlock_user_struct(frame, frame_addr, 0); - return eax; - -badframe: - unlock_user_struct(frame, frame_addr, 0); - force_sig(TARGET_SIGSEGV); - return 0; -} - -long do_rt_sigreturn(CPUX86State *env) -{ - abi_ulong frame_addr; - struct rt_sigframe *frame; - sigset_t set; - int eax; - - frame_addr = env->regs[R_ESP] - 4; - if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) - goto badframe; - target_to_host_sigset(&set, &frame->uc.tuc_sigmask); - sigprocmask(SIG_SETMASK, &set, NULL); - - if (restore_sigcontext(env, &frame->uc.tuc_mcontext, &eax)) - goto badframe; - - if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe, uc.tuc_stack), 0, - get_sp_from_cpustate(env)) == -EFAULT) - goto badframe; - - unlock_user_struct(frame, frame_addr, 0); - return eax; - -badframe: - unlock_user_struct(frame, frame_addr, 0); - force_sig(TARGET_SIGSEGV); - return 0; -} - -#elif defined(TARGET_ARM) - -struct target_sigcontext { - abi_ulong trap_no; - abi_ulong error_code; - abi_ulong oldmask; - abi_ulong arm_r0; - abi_ulong arm_r1; - abi_ulong arm_r2; - abi_ulong arm_r3; - abi_ulong arm_r4; - abi_ulong arm_r5; - abi_ulong arm_r6; - abi_ulong arm_r7; - abi_ulong arm_r8; - abi_ulong arm_r9; - abi_ulong arm_r10; - abi_ulong arm_fp; - abi_ulong arm_ip; - abi_ulong arm_sp; - abi_ulong arm_lr; - abi_ulong arm_pc; - abi_ulong arm_cpsr; - abi_ulong fault_address; -}; - -struct target_ucontext_v1 { - abi_ulong tuc_flags; - abi_ulong tuc_link; - target_stack_t tuc_stack; - struct target_sigcontext tuc_mcontext; - target_sigset_t tuc_sigmask; /* mask last for extensibility */ -}; - -struct target_ucontext_v2 { - abi_ulong tuc_flags; - abi_ulong tuc_link; - target_stack_t tuc_stack; - struct target_sigcontext tuc_mcontext; - target_sigset_t tuc_sigmask; /* mask last for extensibility */ - char __unused[128 - sizeof(target_sigset_t)]; - abi_ulong tuc_regspace[128] __attribute__((__aligned__(8))); -}; - -struct target_user_vfp { - uint64_t fpregs[32]; - abi_ulong fpscr; -}; - -struct target_user_vfp_exc { - abi_ulong fpexc; - abi_ulong fpinst; - abi_ulong fpinst2; -}; - -struct target_vfp_sigframe { - abi_ulong magic; - abi_ulong size; - struct target_user_vfp ufp; - struct target_user_vfp_exc ufp_exc; -} __attribute__((__aligned__(8))); - -struct target_iwmmxt_sigframe { - abi_ulong magic; - abi_ulong size; - uint64_t regs[16]; - /* Note that not all the coprocessor control registers are stored here */ - uint32_t wcssf; - uint32_t wcasf; - uint32_t wcgr0; - uint32_t wcgr1; - uint32_t wcgr2; - uint32_t wcgr3; -} __attribute__((__aligned__(8))); - -#define TARGET_VFP_MAGIC 0x56465001 -#define TARGET_IWMMXT_MAGIC 0x12ef842a - -struct sigframe_v1 -{ - struct target_sigcontext sc; - abi_ulong extramask[TARGET_NSIG_WORDS-1]; - abi_ulong retcode; -}; - -struct sigframe_v2 -{ - struct target_ucontext_v2 uc; - abi_ulong retcode; -}; - -struct rt_sigframe_v1 -{ - abi_ulong pinfo; - abi_ulong puc; - struct target_siginfo info; - struct target_ucontext_v1 uc; - abi_ulong retcode; -}; - -struct rt_sigframe_v2 -{ - struct target_siginfo info; - struct target_ucontext_v2 uc; - abi_ulong retcode; -}; - -#define TARGET_CONFIG_CPU_32 1 - -/* - * For ARM syscalls, we encode the syscall number into the instruction. - */ -#define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE)) -#define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE)) - -/* - * For Thumb syscalls, we pass the syscall number via r7. We therefore - * need two 16-bit instructions. - */ -#define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn)) -#define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn)) - -static const abi_ulong retcodes[4] = { - SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN, - SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN -}; - - -#define __get_user_error(x,p,e) __get_user(x, p) - -static inline int valid_user_regs(CPUState *regs) -{ - return 1; -} - -static void -setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/ - CPUState *env, abi_ulong mask) -{ - __put_user(env->regs[0], &sc->arm_r0); - __put_user(env->regs[1], &sc->arm_r1); - __put_user(env->regs[2], &sc->arm_r2); - __put_user(env->regs[3], &sc->arm_r3); - __put_user(env->regs[4], &sc->arm_r4); - __put_user(env->regs[5], &sc->arm_r5); - __put_user(env->regs[6], &sc->arm_r6); - __put_user(env->regs[7], &sc->arm_r7); - __put_user(env->regs[8], &sc->arm_r8); - __put_user(env->regs[9], &sc->arm_r9); - __put_user(env->regs[10], &sc->arm_r10); - __put_user(env->regs[11], &sc->arm_fp); - __put_user(env->regs[12], &sc->arm_ip); - __put_user(env->regs[13], &sc->arm_sp); - __put_user(env->regs[14], &sc->arm_lr); - __put_user(env->regs[15], &sc->arm_pc); -#ifdef TARGET_CONFIG_CPU_32 - __put_user(cpsr_read(env), &sc->arm_cpsr); -#endif - - __put_user(/* current->thread.trap_no */ 0, &sc->trap_no); - __put_user(/* current->thread.error_code */ 0, &sc->error_code); - __put_user(/* current->thread.address */ 0, &sc->fault_address); - __put_user(mask, &sc->oldmask); -} - -static inline abi_ulong -get_sigframe(struct target_sigaction *ka, CPUState *regs, int framesize) -{ - unsigned long sp = regs->regs[13]; - - /* - * This is the X/Open sanctioned signal stack switching. - */ - if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp)) - sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; - /* - * ATPCS B01 mandates 8-byte alignment - */ - return (sp - framesize) & ~7; -} - -static int -setup_return(CPUState *env, struct target_sigaction *ka, - abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr) -{ - abi_ulong handler = ka->_sa_handler; - abi_ulong retcode; - int thumb = handler & 1; - uint32_t cpsr = cpsr_read(env); - - cpsr &= ~CPSR_IT; - if (thumb) { - cpsr |= CPSR_T; - } else { - cpsr &= ~CPSR_T; - } - - if (ka->sa_flags & TARGET_SA_RESTORER) { - retcode = ka->sa_restorer; - } else { - unsigned int idx = thumb; - - if (ka->sa_flags & TARGET_SA_SIGINFO) - idx += 2; - - if (__put_user(retcodes[idx], rc)) - return 1; - - retcode = rc_addr + thumb; - } - - env->regs[0] = usig; - env->regs[13] = frame_addr; - env->regs[14] = retcode; - env->regs[15] = handler & (thumb ? ~1 : ~3); - cpsr_write(env, cpsr, 0xffffffff); - - return 0; -} - -static abi_ulong *setup_sigframe_v2_vfp(abi_ulong *regspace, CPUState *env) -{ - int i; - struct target_vfp_sigframe *vfpframe; - vfpframe = (struct target_vfp_sigframe *)regspace; - __put_user(TARGET_VFP_MAGIC, &vfpframe->magic); - __put_user(sizeof(*vfpframe), &vfpframe->size); - for (i = 0; i < 32; i++) { - __put_user(float64_val(env->vfp.regs[i]), &vfpframe->ufp.fpregs[i]); - } - __put_user(vfp_get_fpscr(env), &vfpframe->ufp.fpscr); - __put_user(env->vfp.xregs[ARM_VFP_FPEXC], &vfpframe->ufp_exc.fpexc); - __put_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst); - __put_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2); - return (abi_ulong*)(vfpframe+1); -} - -static abi_ulong *setup_sigframe_v2_iwmmxt(abi_ulong *regspace, CPUState *env) -{ - int i; - struct target_iwmmxt_sigframe *iwmmxtframe; - iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace; - __put_user(TARGET_IWMMXT_MAGIC, &iwmmxtframe->magic); - __put_user(sizeof(*iwmmxtframe), &iwmmxtframe->size); - for (i = 0; i < 16; i++) { - __put_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]); - } - __put_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf); - __put_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf); - __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0); - __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1); - __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2); - __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3); - return (abi_ulong*)(iwmmxtframe+1); -} - -static void setup_sigframe_v2(struct target_ucontext_v2 *uc, - target_sigset_t *set, CPUState *env) -{ - struct target_sigaltstack stack; - int i; - abi_ulong *regspace; - - /* Clear all the bits of the ucontext we don't use. */ - memset(uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext)); - - memset(&stack, 0, sizeof(stack)); - __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp); - __put_user(target_sigaltstack_used.ss_size, &stack.ss_size); - __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags); - memcpy(&uc->tuc_stack, &stack, sizeof(stack)); - - setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]); - /* Save coprocessor signal frame. */ - regspace = uc->tuc_regspace; - if (arm_feature(env, ARM_FEATURE_VFP)) { - regspace = setup_sigframe_v2_vfp(regspace, env); - } - if (arm_feature(env, ARM_FEATURE_IWMMXT)) { - regspace = setup_sigframe_v2_iwmmxt(regspace, env); - } - - /* Write terminating magic word */ - __put_user(0, regspace); - - for(i = 0; i < TARGET_NSIG_WORDS; i++) { - __put_user(set->sig[i], &uc->tuc_sigmask.sig[i]); - } -} - -/* compare linux/arch/arm/kernel/signal.c:setup_frame() */ -static void setup_frame_v1(int usig, struct target_sigaction *ka, - target_sigset_t *set, CPUState *regs) -{ - struct sigframe_v1 *frame; - abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame)); - int i; - - if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) - return; - - setup_sigcontext(&frame->sc, regs, set->sig[0]); - - for(i = 1; i < TARGET_NSIG_WORDS; i++) { - if (__put_user(set->sig[i], &frame->extramask[i - 1])) - goto end; - } - - setup_return(regs, ka, &frame->retcode, frame_addr, usig, - frame_addr + offsetof(struct sigframe_v1, retcode)); - -end: - unlock_user_struct(frame, frame_addr, 1); -} - -static void setup_frame_v2(int usig, struct target_sigaction *ka, - target_sigset_t *set, CPUState *regs) -{ - struct sigframe_v2 *frame; - abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame)); - - if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) - return; - - setup_sigframe_v2(&frame->uc, set, regs); - - setup_return(regs, ka, &frame->retcode, frame_addr, usig, - frame_addr + offsetof(struct sigframe_v2, retcode)); - - unlock_user_struct(frame, frame_addr, 1); -} - -static void setup_frame(int usig, struct target_sigaction *ka, - target_sigset_t *set, CPUState *regs) -{ - if (get_osversion() >= 0x020612) { - setup_frame_v2(usig, ka, set, regs); - } else { - setup_frame_v1(usig, ka, set, regs); - } -} - -/* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */ -static void setup_rt_frame_v1(int usig, struct target_sigaction *ka, - target_siginfo_t *info, - target_sigset_t *set, CPUState *env) -{ - struct rt_sigframe_v1 *frame; - abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame)); - struct target_sigaltstack stack; - int i; - abi_ulong info_addr, uc_addr; - - if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) - return /* 1 */; - - info_addr = frame_addr + offsetof(struct rt_sigframe_v1, info); - __put_user(info_addr, &frame->pinfo); - uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc); - __put_user(uc_addr, &frame->puc); - copy_siginfo_to_user(&frame->info, info); - - /* Clear all the bits of the ucontext we don't use. */ - memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext)); - - memset(&stack, 0, sizeof(stack)); - __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp); - __put_user(target_sigaltstack_used.ss_size, &stack.ss_size); - __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags); - memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack)); - - setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]); - for(i = 0; i < TARGET_NSIG_WORDS; i++) { - if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i])) - goto end; - } - - setup_return(env, ka, &frame->retcode, frame_addr, usig, - frame_addr + offsetof(struct rt_sigframe_v1, retcode)); - - env->regs[1] = info_addr; - env->regs[2] = uc_addr; - -end: - unlock_user_struct(frame, frame_addr, 1); -} - -static void setup_rt_frame_v2(int usig, struct target_sigaction *ka, - target_siginfo_t *info, - target_sigset_t *set, CPUState *env) -{ - struct rt_sigframe_v2 *frame; - abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame)); - abi_ulong info_addr, uc_addr; - - if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) - return /* 1 */; - - info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info); - uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc); - copy_siginfo_to_user(&frame->info, info); - - setup_sigframe_v2(&frame->uc, set, env); - - setup_return(env, ka, &frame->retcode, frame_addr, usig, - frame_addr + offsetof(struct rt_sigframe_v2, retcode)); - - env->regs[1] = info_addr; - env->regs[2] = uc_addr; - - unlock_user_struct(frame, frame_addr, 1); -} - -static void setup_rt_frame(int usig, struct target_sigaction *ka, - target_siginfo_t *info, - target_sigset_t *set, CPUState *env) -{ - if (get_osversion() >= 0x020612) { - setup_rt_frame_v2(usig, ka, info, set, env); - } else { - setup_rt_frame_v1(usig, ka, info, set, env); - } -} - -static int -restore_sigcontext(CPUState *env, struct target_sigcontext *sc) -{ - int err = 0; - uint32_t cpsr; - - __get_user_error(env->regs[0], &sc->arm_r0, err); - __get_user_error(env->regs[1], &sc->arm_r1, err); - __get_user_error(env->regs[2], &sc->arm_r2, err); - __get_user_error(env->regs[3], &sc->arm_r3, err); - __get_user_error(env->regs[4], &sc->arm_r4, err); - __get_user_error(env->regs[5], &sc->arm_r5, err); - __get_user_error(env->regs[6], &sc->arm_r6, err); - __get_user_error(env->regs[7], &sc->arm_r7, err); - __get_user_error(env->regs[8], &sc->arm_r8, err); - __get_user_error(env->regs[9], &sc->arm_r9, err); - __get_user_error(env->regs[10], &sc->arm_r10, err); - __get_user_error(env->regs[11], &sc->arm_fp, err); - __get_user_error(env->regs[12], &sc->arm_ip, err); - __get_user_error(env->regs[13], &sc->arm_sp, err); - __get_user_error(env->regs[14], &sc->arm_lr, err); - __get_user_error(env->regs[15], &sc->arm_pc, err); -#ifdef TARGET_CONFIG_CPU_32 - __get_user_error(cpsr, &sc->arm_cpsr, err); - cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC); -#endif - - err |= !valid_user_regs(env); - - return err; -} - -static long do_sigreturn_v1(CPUState *env) -{ - abi_ulong frame_addr; - struct sigframe_v1 *frame; - target_sigset_t set; - sigset_t host_set; - int i; - - /* - * Since we stacked the signal on a 64-bit boundary, - * then 'sp' should be word aligned here. If it's - * not, then the user is trying to mess with us. - */ - if (env->regs[13] & 7) - goto badframe; - - frame_addr = env->regs[13]; - if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) - goto badframe; - - if (__get_user(set.sig[0], &frame->sc.oldmask)) - goto badframe; - for(i = 1; i < TARGET_NSIG_WORDS; i++) { - if (__get_user(set.sig[i], &frame->extramask[i - 1])) - goto badframe; - } - - target_to_host_sigset_internal(&host_set, &set); - sigprocmask(SIG_SETMASK, &host_set, NULL); - - if (restore_sigcontext(env, &frame->sc)) - goto badframe; - -#if 0 - /* Send SIGTRAP if we're single-stepping */ - if (ptrace_cancel_bpt(current)) - send_sig(SIGTRAP, current, 1); -#endif - unlock_user_struct(frame, frame_addr, 0); - return env->regs[0]; - -badframe: - unlock_user_struct(frame, frame_addr, 0); - force_sig(TARGET_SIGSEGV /* , current */); - return 0; -} - -static abi_ulong *restore_sigframe_v2_vfp(CPUState *env, abi_ulong *regspace) -{ - int i; - abi_ulong magic, sz; - uint32_t fpscr, fpexc; - struct target_vfp_sigframe *vfpframe; - vfpframe = (struct target_vfp_sigframe *)regspace; - - __get_user(magic, &vfpframe->magic); - __get_user(sz, &vfpframe->size); - if (magic != TARGET_VFP_MAGIC || sz != sizeof(*vfpframe)) { - return 0; - } - for (i = 0; i < 32; i++) { - __get_user(float64_val(env->vfp.regs[i]), &vfpframe->ufp.fpregs[i]); - } - __get_user(fpscr, &vfpframe->ufp.fpscr); - vfp_set_fpscr(env, fpscr); - __get_user(fpexc, &vfpframe->ufp_exc.fpexc); - /* Sanitise FPEXC: ensure VFP is enabled, FPINST2 is invalid - * and the exception flag is cleared - */ - fpexc |= (1 << 30); - fpexc &= ~((1 << 31) | (1 << 28)); - env->vfp.xregs[ARM_VFP_FPEXC] = fpexc; - __get_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst); - __get_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2); - return (abi_ulong*)(vfpframe + 1); -} - -static abi_ulong *restore_sigframe_v2_iwmmxt(CPUState *env, abi_ulong *regspace) -{ - int i; - abi_ulong magic, sz; - struct target_iwmmxt_sigframe *iwmmxtframe; - iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace; - - __get_user(magic, &iwmmxtframe->magic); - __get_user(sz, &iwmmxtframe->size); - if (magic != TARGET_IWMMXT_MAGIC || sz != sizeof(*iwmmxtframe)) { - return 0; - } - for (i = 0; i < 16; i++) { - __get_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]); - } - __get_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf); - __get_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf); - __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0); - __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1); - __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2); - __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3); - return (abi_ulong*)(iwmmxtframe + 1); -} - -static int do_sigframe_return_v2(CPUState *env, target_ulong frame_addr, - struct target_ucontext_v2 *uc) -{ - sigset_t host_set; - abi_ulong *regspace; - - target_to_host_sigset(&host_set, &uc->tuc_sigmask); - sigprocmask(SIG_SETMASK, &host_set, NULL); - - if (restore_sigcontext(env, &uc->tuc_mcontext)) - return 1; - - /* Restore coprocessor signal frame */ - regspace = uc->tuc_regspace; - if (arm_feature(env, ARM_FEATURE_VFP)) { - regspace = restore_sigframe_v2_vfp(env, regspace); - if (!regspace) { - return 1; - } - } - if (arm_feature(env, ARM_FEATURE_IWMMXT)) { - regspace = restore_sigframe_v2_iwmmxt(env, regspace); - if (!regspace) { - return 1; - } - } - - if (do_sigaltstack(frame_addr + offsetof(struct target_ucontext_v2, tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) - return 1; - -#if 0 - /* Send SIGTRAP if we're single-stepping */ - if (ptrace_cancel_bpt(current)) - send_sig(SIGTRAP, current, 1); -#endif - - return 0; -} - -static long do_sigreturn_v2(CPUState *env) -{ - abi_ulong frame_addr; - struct sigframe_v2 *frame; - - /* - * Since we stacked the signal on a 64-bit boundary, - * then 'sp' should be word aligned here. If it's - * not, then the user is trying to mess with us. - */ - if (env->regs[13] & 7) - goto badframe; - - frame_addr = env->regs[13]; - if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) - goto badframe; - - if (do_sigframe_return_v2(env, frame_addr, &frame->uc)) - goto badframe; - - unlock_user_struct(frame, frame_addr, 0); - return env->regs[0]; - -badframe: - unlock_user_struct(frame, frame_addr, 0); - force_sig(TARGET_SIGSEGV /* , current */); - return 0; -} - -long do_sigreturn(CPUState *env) -{ - if (get_osversion() >= 0x020612) { - return do_sigreturn_v2(env); - } else { - return do_sigreturn_v1(env); - } -} - -static long do_rt_sigreturn_v1(CPUState *env) -{ - abi_ulong frame_addr; - struct rt_sigframe_v1 *frame; - sigset_t host_set; - - /* - * Since we stacked the signal on a 64-bit boundary, - * then 'sp' should be word aligned here. If it's - * not, then the user is trying to mess with us. - */ - if (env->regs[13] & 7) - goto badframe; - - frame_addr = env->regs[13]; - if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) - goto badframe; - - target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask); - sigprocmask(SIG_SETMASK, &host_set, NULL); - - if (restore_sigcontext(env, &frame->uc.tuc_mcontext)) - goto badframe; - - if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT) - goto badframe; - -#if 0 - /* Send SIGTRAP if we're single-stepping */ - if (ptrace_cancel_bpt(current)) - send_sig(SIGTRAP, current, 1); -#endif - unlock_user_struct(frame, frame_addr, 0); - return env->regs[0]; - -badframe: - unlock_user_struct(frame, frame_addr, 0); - force_sig(TARGET_SIGSEGV /* , current */); - return 0; -} - -static long do_rt_sigreturn_v2(CPUState *env) -{ - abi_ulong frame_addr; - struct rt_sigframe_v2 *frame; - - /* - * Since we stacked the signal on a 64-bit boundary, - * then 'sp' should be word aligned here. If it's - * not, then the user is trying to mess with us. - */ - if (env->regs[13] & 7) - goto badframe; - - frame_addr = env->regs[13]; - if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) - goto badframe; - - if (do_sigframe_return_v2(env, frame_addr, &frame->uc)) - goto badframe; - - unlock_user_struct(frame, frame_addr, 0); - return env->regs[0]; - -badframe: - unlock_user_struct(frame, frame_addr, 0); - force_sig(TARGET_SIGSEGV /* , current */); - return 0; -} - -long do_rt_sigreturn(CPUState *env) -{ - if (get_osversion() >= 0x020612) { - return do_rt_sigreturn_v2(env); - } else { - return do_rt_sigreturn_v1(env); - } -} - -#elif defined(TARGET_SPARC) - -#define __SUNOS_MAXWIN 31 - -/* This is what SunOS does, so shall I. */ -struct target_sigcontext { - abi_ulong sigc_onstack; /* state to restore */ - - abi_ulong sigc_mask; /* sigmask to restore */ - abi_ulong sigc_sp; /* stack pointer */ - abi_ulong sigc_pc; /* program counter */ - abi_ulong sigc_npc; /* next program counter */ - abi_ulong sigc_psr; /* for condition codes etc */ - abi_ulong sigc_g1; /* User uses these two registers */ - abi_ulong sigc_o0; /* within the trampoline code. */ - - /* Now comes information regarding the users window set - * at the time of the signal. - */ - abi_ulong sigc_oswins; /* outstanding windows */ - - /* stack ptrs for each regwin buf */ - char *sigc_spbuf[__SUNOS_MAXWIN]; - - /* Windows to restore after signal */ - struct { - abi_ulong locals[8]; - abi_ulong ins[8]; - } sigc_wbuf[__SUNOS_MAXWIN]; -}; -/* A Sparc stack frame */ -struct sparc_stackf { - abi_ulong locals[8]; - abi_ulong ins[8]; - /* It's simpler to treat fp and callers_pc as elements of ins[] - * since we never need to access them ourselves. - */ - char *structptr; - abi_ulong xargs[6]; - abi_ulong xxargs[1]; -}; - -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 { - unsigned long si_float_regs [32]; - unsigned long si_fsr; - unsigned long si_fpqdepth; - struct { - unsigned long *insn_addr; - unsigned long insn; - } si_fpqueue [16]; -} qemu_siginfo_fpu_t; - - -struct target_signal_frame { - struct sparc_stackf ss; - __siginfo_t info; - abi_ulong fpu_save; - abi_ulong insns[2] __attribute__ ((aligned (8))); - abi_ulong extramask[TARGET_NSIG_WORDS - 1]; - abi_ulong extra_size; /* Should be 0 */ - qemu_siginfo_fpu_t fpu_state; -}; -struct target_rt_signal_frame { - struct sparc_stackf ss; - siginfo_t info; - abi_ulong regs[20]; - sigset_t mask; - abi_ulong fpu_save; - unsigned int insns[2]; - stack_t stack; - unsigned int extra_size; /* Should be 0 */ - qemu_siginfo_fpu_t fpu_state; -}; - -#define UREG_O0 16 -#define UREG_O6 22 -#define UREG_I0 0 -#define UREG_I1 1 -#define UREG_I2 2 -#define UREG_I3 3 -#define UREG_I4 4 -#define UREG_I5 5 -#define UREG_I6 6 -#define UREG_I7 7 -#define UREG_L0 8 -#define UREG_FP UREG_I6 -#define UREG_SP UREG_O6 - -static inline abi_ulong get_sigframe(struct target_sigaction *sa, - CPUState *env, unsigned long framesize) -{ - abi_ulong sp; - - sp = env->regwptr[UREG_FP]; - - /* This is the X/Open sanctioned signal stack switching. */ - if (sa->sa_flags & TARGET_SA_ONSTACK) { - if (!on_sig_stack(sp) - && !((target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size) & 7)) - sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; - } - return sp - framesize; -} - -static int -setup___siginfo(__siginfo_t *si, CPUState *env, abi_ulong mask) -{ - int err = 0, i; - - err |= __put_user(env->psr, &si->si_regs.psr); - err |= __put_user(env->pc, &si->si_regs.pc); - err |= __put_user(env->npc, &si->si_regs.npc); - err |= __put_user(env->y, &si->si_regs.y); - for (i=0; i < 8; i++) { - err |= __put_user(env->gregs[i], &si->si_regs.u_regs[i]); - } - for (i=0; i < 8; i++) { - err |= __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]); - } - err |= __put_user(mask, &si->si_mask); - return err; -} - -#if 0 -static int -setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/ - CPUState *env, unsigned long mask) -{ - int err = 0; - - err |= __put_user(mask, &sc->sigc_mask); - err |= __put_user(env->regwptr[UREG_SP], &sc->sigc_sp); - err |= __put_user(env->pc, &sc->sigc_pc); - err |= __put_user(env->npc, &sc->sigc_npc); - err |= __put_user(env->psr, &sc->sigc_psr); - err |= __put_user(env->gregs[1], &sc->sigc_g1); - err |= __put_user(env->regwptr[UREG_O0], &sc->sigc_o0); - - return err; -} -#endif -#define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7))) - -static void setup_frame(int sig, struct target_sigaction *ka, - target_sigset_t *set, CPUState *env) -{ - abi_ulong sf_addr; - struct target_signal_frame *sf; - int sigframe_size, err, i; - - /* 1. Make sure everything is clean */ - //synchronize_user_stack(); - - sigframe_size = NF_ALIGNEDSZ; - sf_addr = get_sigframe(ka, env, sigframe_size); - - sf = lock_user(VERIFY_WRITE, sf_addr, - sizeof(struct target_signal_frame), 0); - if (!sf) - goto sigsegv; - - //fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]); -#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]); - err |= __put_user(0, &sf->extra_size); - - //err |= save_fpu_state(regs, &sf->fpu_state); - //err |= __put_user(&sf->fpu_state, &sf->fpu_save); - - err |= __put_user(set->sig[0], &sf->info.si_mask); - for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) { - err |= __put_user(set->sig[i + 1], &sf->extramask[i]); - } - - for (i = 0; i < 8; i++) { - err |= __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]); - } - for (i = 0; i < 8; i++) { - err |= __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]); - } - if (err) - goto sigsegv; - - /* 3. signal handler back-trampoline and parameters */ - env->regwptr[UREG_FP] = sf_addr; - env->regwptr[UREG_I0] = sig; - env->regwptr[UREG_I1] = sf_addr + - offsetof(struct target_signal_frame, info); - env->regwptr[UREG_I2] = sf_addr + - offsetof(struct target_signal_frame, info); - - /* 4. signal handler */ - env->pc = ka->_sa_handler; - env->npc = (env->pc + 4); - /* 5. return to kernel instructions */ - if (ka->sa_restorer) - env->regwptr[UREG_I7] = ka->sa_restorer; - else { - uint32_t val32; - - env->regwptr[UREG_I7] = sf_addr + - offsetof(struct target_signal_frame, insns) - 2 * 4; - - /* mov __NR_sigreturn, %g1 */ - val32 = 0x821020d8; - err |= __put_user(val32, &sf->insns[0]); - - /* t 0x10 */ - val32 = 0x91d02010; - err |= __put_user(val32, &sf->insns[1]); - if (err) - goto sigsegv; - - /* Flush instruction space. */ - //flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0])); - // tb_flush(env); - } - unlock_user(sf, sf_addr, sizeof(struct target_signal_frame)); - return; -#if 0 -sigill_and_return: - force_sig(TARGET_SIGILL); -#endif -sigsegv: - //fprintf(stderr, "force_sig\n"); - unlock_user(sf, sf_addr, sizeof(struct target_signal_frame)); - force_sig(TARGET_SIGSEGV); -} -static inline int -restore_fpu_state(CPUState *env, qemu_siginfo_fpu_t *fpu) -{ - int err; -#if 0 -#ifdef CONFIG_SMP - if (current->flags & PF_USEDFPU) - regs->psr &= ~PSR_EF; -#else - if (current == last_task_used_math) { - last_task_used_math = 0; - regs->psr &= ~PSR_EF; - } -#endif - current->used_math = 1; - current->flags &= ~PF_USEDFPU; -#endif -#if 0 - if (verify_area (VERIFY_READ, fpu, sizeof(*fpu))) - return -EFAULT; -#endif - -#if 0 - /* XXX: incorrect */ - err = __copy_from_user(&env->fpr[0], &fpu->si_float_regs[0], - (sizeof(unsigned long) * 32)); -#endif - err |= __get_user(env->fsr, &fpu->si_fsr); -#if 0 - err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth); - if (current->thread.fpqdepth != 0) - err |= __copy_from_user(¤t->thread.fpqueue[0], - &fpu->si_fpqueue[0], - ((sizeof(unsigned long) + - (sizeof(unsigned long *)))*16)); -#endif - return err; -} - - -static void setup_rt_frame(int sig, struct target_sigaction *ka, - target_siginfo_t *info, - target_sigset_t *set, CPUState *env) -{ - fprintf(stderr, "setup_rt_frame: not implemented\n"); -} - -long do_sigreturn(CPUState *env) -{ - abi_ulong sf_addr; - struct target_signal_frame *sf; - uint32_t up_psr, pc, npc; - target_sigset_t set; - sigset_t host_set; - int err, i; - - sf_addr = env->regwptr[UREG_FP]; - if (!lock_user_struct(VERIFY_READ, sf, sf_addr, 1)) - goto segv_and_exit; -#if 0 - fprintf(stderr, "sigreturn\n"); - fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]); -#endif - //cpu_dump_state(env, stderr, fprintf, 0); - - /* 1. Make sure we are not getting garbage from the user */ - - if (sf_addr & 3) - goto segv_and_exit; - - err = __get_user(pc, &sf->info.si_regs.pc); - err |= __get_user(npc, &sf->info.si_regs.npc); - - if ((pc | npc) & 3) - goto segv_and_exit; - - /* 2. Restore the state */ - err |= __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 */)); - - env->pc = pc; - env->npc = npc; - err |= __get_user(env->y, &sf->info.si_regs.y); - for (i=0; i < 8; i++) { - err |= __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]); - } - for (i=0; i < 8; i++) { - err |= __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]); - } - - /* FIXME: implement FPU save/restore: - * __get_user(fpu_save, &sf->fpu_save); - * if (fpu_save) - * err |= restore_fpu_state(env, fpu_save); - */ - - /* This is pretty much atomic, no amount locking would prevent - * the races which exist anyways. - */ - err |= __get_user(set.sig[0], &sf->info.si_mask); - for(i = 1; i < TARGET_NSIG_WORDS; i++) { - err |= (__get_user(set.sig[i], &sf->extramask[i - 1])); - } - - target_to_host_sigset_internal(&host_set, &set); - sigprocmask(SIG_SETMASK, &host_set, NULL); - - if (err) - goto segv_and_exit; - unlock_user_struct(sf, sf_addr, 0); - return env->regwptr[0]; - -segv_and_exit: - unlock_user_struct(sf, sf_addr, 0); - force_sig(TARGET_SIGSEGV); -} - -long do_rt_sigreturn(CPUState *env) -{ - fprintf(stderr, "do_rt_sigreturn: not implemented\n"); - return -TARGET_ENOSYS; -} - -#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) -#define MC_TSTATE 0 -#define MC_PC 1 -#define MC_NPC 2 -#define MC_Y 3 -#define MC_G1 4 -#define MC_G2 5 -#define MC_G3 6 -#define MC_G4 7 -#define MC_G5 8 -#define MC_G6 9 -#define MC_G7 10 -#define MC_O0 11 -#define MC_O1 12 -#define MC_O2 13 -#define MC_O3 14 -#define MC_O4 15 -#define MC_O5 16 -#define MC_O6 17 -#define MC_O7 18 -#define MC_NGREG 19 - -typedef abi_ulong target_mc_greg_t; -typedef target_mc_greg_t target_mc_gregset_t[MC_NGREG]; - -struct target_mc_fq { - abi_ulong *mcfq_addr; - uint32_t mcfq_insn; -}; - -struct target_mc_fpu { - union { - uint32_t sregs[32]; - uint64_t dregs[32]; - //uint128_t qregs[16]; - } mcfpu_fregs; - abi_ulong mcfpu_fsr; - abi_ulong mcfpu_fprs; - abi_ulong mcfpu_gsr; - struct target_mc_fq *mcfpu_fq; - unsigned char mcfpu_qcnt; - unsigned char mcfpu_qentsz; - unsigned char mcfpu_enab; -}; -typedef struct target_mc_fpu target_mc_fpu_t; - -typedef struct { - target_mc_gregset_t mc_gregs; - target_mc_greg_t mc_fp; - target_mc_greg_t mc_i7; - target_mc_fpu_t mc_fpregs; -} target_mcontext_t; - -struct target_ucontext { - struct target_ucontext *tuc_link; - abi_ulong tuc_flags; - target_sigset_t tuc_sigmask; - target_mcontext_t tuc_mcontext; -}; - -/* A V9 register window */ -struct target_reg_window { - abi_ulong locals[8]; - abi_ulong ins[8]; -}; - -#define TARGET_STACK_BIAS 2047 - -/* {set, get}context() needed for 64-bit SparcLinux userland. */ -void sparc64_set_context(CPUSPARCState *env) -{ - abi_ulong ucp_addr; - struct target_ucontext *ucp; - target_mc_gregset_t *grp; - abi_ulong pc, npc, tstate; - abi_ulong fp, i7, w_addr; - int err; - unsigned int i; - - ucp_addr = env->regwptr[UREG_I0]; - if (!lock_user_struct(VERIFY_READ, ucp, ucp_addr, 1)) - goto do_sigsegv; - grp = &ucp->tuc_mcontext.mc_gregs; - err = __get_user(pc, &((*grp)[MC_PC])); - err |= __get_user(npc, &((*grp)[MC_NPC])); - if (err || ((pc | npc) & 3)) - goto do_sigsegv; - if (env->regwptr[UREG_I1]) { - target_sigset_t target_set; - sigset_t set; - - if (TARGET_NSIG_WORDS == 1) { - if (__get_user(target_set.sig[0], &ucp->tuc_sigmask.sig[0])) - goto do_sigsegv; - } else { - abi_ulong *src, *dst; - src = ucp->tuc_sigmask.sig; - dst = target_set.sig; - for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong); - i++, dst++, src++) - err |= __get_user(*dst, src); - if (err) - goto do_sigsegv; - } - target_to_host_sigset_internal(&set, &target_set); - sigprocmask(SIG_SETMASK, &set, NULL); - } - env->pc = pc; - env->npc = npc; - err |= __get_user(env->y, &((*grp)[MC_Y])); - err |= __get_user(tstate, &((*grp)[MC_TSTATE])); - env->asi = (tstate >> 24) & 0xff; - cpu_put_ccr(env, tstate >> 32); - cpu_put_cwp64(env, tstate & 0x1f); - err |= __get_user(env->gregs[1], (&(*grp)[MC_G1])); - err |= __get_user(env->gregs[2], (&(*grp)[MC_G2])); - err |= __get_user(env->gregs[3], (&(*grp)[MC_G3])); - err |= __get_user(env->gregs[4], (&(*grp)[MC_G4])); - err |= __get_user(env->gregs[5], (&(*grp)[MC_G5])); - err |= __get_user(env->gregs[6], (&(*grp)[MC_G6])); - err |= __get_user(env->gregs[7], (&(*grp)[MC_G7])); - err |= __get_user(env->regwptr[UREG_I0], (&(*grp)[MC_O0])); - err |= __get_user(env->regwptr[UREG_I1], (&(*grp)[MC_O1])); - err |= __get_user(env->regwptr[UREG_I2], (&(*grp)[MC_O2])); - err |= __get_user(env->regwptr[UREG_I3], (&(*grp)[MC_O3])); - err |= __get_user(env->regwptr[UREG_I4], (&(*grp)[MC_O4])); - err |= __get_user(env->regwptr[UREG_I5], (&(*grp)[MC_O5])); - err |= __get_user(env->regwptr[UREG_I6], (&(*grp)[MC_O6])); - err |= __get_user(env->regwptr[UREG_I7], (&(*grp)[MC_O7])); - - err |= __get_user(fp, &(ucp->tuc_mcontext.mc_fp)); - err |= __get_user(i7, &(ucp->tuc_mcontext.mc_i7)); - - w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6]; - if (put_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]), - abi_ulong) != 0) - goto do_sigsegv; - if (put_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]), - abi_ulong) != 0) - goto do_sigsegv; - /* FIXME this does not match how the kernel handles the FPU in - * its sparc64_set_context implementation. In particular the FPU - * is only restored if fenab is non-zero in: - * __get_user(fenab, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_enab)); - */ - err |= __get_user(env->fprs, &(ucp->tuc_mcontext.mc_fpregs.mcfpu_fprs)); - { - uint32_t *src = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs; - for (i = 0; i < 64; i++, src++) { - if (i & 1) { - err |= __get_user(env->fpr[i/2].l.lower, src); - } else { - err |= __get_user(env->fpr[i/2].l.upper, src); - } - } - } - err |= __get_user(env->fsr, - &(ucp->tuc_mcontext.mc_fpregs.mcfpu_fsr)); - err |= __get_user(env->gsr, - &(ucp->tuc_mcontext.mc_fpregs.mcfpu_gsr)); - if (err) - goto do_sigsegv; - unlock_user_struct(ucp, ucp_addr, 0); - return; - do_sigsegv: - unlock_user_struct(ucp, ucp_addr, 0); - force_sig(TARGET_SIGSEGV); -} - -void sparc64_get_context(CPUSPARCState *env) -{ - abi_ulong ucp_addr; - struct target_ucontext *ucp; - target_mc_gregset_t *grp; - target_mcontext_t *mcp; - abi_ulong fp, i7, w_addr; - int err; - unsigned int i; - target_sigset_t target_set; - sigset_t set; - - ucp_addr = env->regwptr[UREG_I0]; - if (!lock_user_struct(VERIFY_WRITE, ucp, ucp_addr, 0)) - goto do_sigsegv; - - mcp = &ucp->tuc_mcontext; - grp = &mcp->mc_gregs; - - /* Skip over the trap instruction, first. */ - env->pc = env->npc; - env->npc += 4; - - err = 0; - - sigprocmask(0, NULL, &set); - host_to_target_sigset_internal(&target_set, &set); - if (TARGET_NSIG_WORDS == 1) { - err |= __put_user(target_set.sig[0], - (abi_ulong *)&ucp->tuc_sigmask); - } else { - abi_ulong *src, *dst; - src = target_set.sig; - dst = ucp->tuc_sigmask.sig; - for (i = 0; i < sizeof(target_sigset_t) / sizeof(abi_ulong); - i++, dst++, src++) - err |= __put_user(*src, dst); - if (err) - goto do_sigsegv; - } - - /* XXX: tstate must be saved properly */ - // err |= __put_user(env->tstate, &((*grp)[MC_TSTATE])); - err |= __put_user(env->pc, &((*grp)[MC_PC])); - err |= __put_user(env->npc, &((*grp)[MC_NPC])); - err |= __put_user(env->y, &((*grp)[MC_Y])); - err |= __put_user(env->gregs[1], &((*grp)[MC_G1])); - err |= __put_user(env->gregs[2], &((*grp)[MC_G2])); - err |= __put_user(env->gregs[3], &((*grp)[MC_G3])); - err |= __put_user(env->gregs[4], &((*grp)[MC_G4])); - err |= __put_user(env->gregs[5], &((*grp)[MC_G5])); - err |= __put_user(env->gregs[6], &((*grp)[MC_G6])); - err |= __put_user(env->gregs[7], &((*grp)[MC_G7])); - err |= __put_user(env->regwptr[UREG_I0], &((*grp)[MC_O0])); - err |= __put_user(env->regwptr[UREG_I1], &((*grp)[MC_O1])); - err |= __put_user(env->regwptr[UREG_I2], &((*grp)[MC_O2])); - err |= __put_user(env->regwptr[UREG_I3], &((*grp)[MC_O3])); - err |= __put_user(env->regwptr[UREG_I4], &((*grp)[MC_O4])); - err |= __put_user(env->regwptr[UREG_I5], &((*grp)[MC_O5])); - err |= __put_user(env->regwptr[UREG_I6], &((*grp)[MC_O6])); - err |= __put_user(env->regwptr[UREG_I7], &((*grp)[MC_O7])); - - w_addr = TARGET_STACK_BIAS+env->regwptr[UREG_I6]; - fp = i7 = 0; - if (get_user(fp, w_addr + offsetof(struct target_reg_window, ins[6]), - abi_ulong) != 0) - goto do_sigsegv; - if (get_user(i7, w_addr + offsetof(struct target_reg_window, ins[7]), - abi_ulong) != 0) - goto do_sigsegv; - err |= __put_user(fp, &(mcp->mc_fp)); - err |= __put_user(i7, &(mcp->mc_i7)); - - { - uint32_t *dst = ucp->tuc_mcontext.mc_fpregs.mcfpu_fregs.sregs; - for (i = 0; i < 64; i++, dst++) { - if (i & 1) { - err |= __put_user(env->fpr[i/2].l.lower, dst); - } else { - err |= __put_user(env->fpr[i/2].l.upper, dst); - } - } - } - err |= __put_user(env->fsr, &(mcp->mc_fpregs.mcfpu_fsr)); - err |= __put_user(env->gsr, &(mcp->mc_fpregs.mcfpu_gsr)); - err |= __put_user(env->fprs, &(mcp->mc_fpregs.mcfpu_fprs)); - - if (err) - goto do_sigsegv; - unlock_user_struct(ucp, ucp_addr, 1); - return; - do_sigsegv: - unlock_user_struct(ucp, ucp_addr, 1); - force_sig(TARGET_SIGSEGV); -} -#endif -#elif defined(TARGET_ABI_MIPSN64) - -# warning signal handling not implemented - -static void setup_frame(int sig, struct target_sigaction *ka, - target_sigset_t *set, CPUState *env) -{ - fprintf(stderr, "setup_frame: not implemented\n"); -} - -static void setup_rt_frame(int sig, struct target_sigaction *ka, - target_siginfo_t *info, - target_sigset_t *set, CPUState *env) -{ - fprintf(stderr, "setup_rt_frame: not implemented\n"); -} - -long do_sigreturn(CPUState *env) -{ - fprintf(stderr, "do_sigreturn: not implemented\n"); - return -TARGET_ENOSYS; -} - -long do_rt_sigreturn(CPUState *env) -{ - fprintf(stderr, "do_rt_sigreturn: not implemented\n"); - return -TARGET_ENOSYS; -} - -#elif defined(TARGET_ABI_MIPSN32) - -# warning signal handling not implemented - -static void setup_frame(int sig, struct target_sigaction *ka, - target_sigset_t *set, CPUState *env) -{ - fprintf(stderr, "setup_frame: not implemented\n"); -} - -static void setup_rt_frame(int sig, struct target_sigaction *ka, - target_siginfo_t *info, - target_sigset_t *set, CPUState *env) -{ - fprintf(stderr, "setup_rt_frame: not implemented\n"); -} - -long do_sigreturn(CPUState *env) -{ - fprintf(stderr, "do_sigreturn: not implemented\n"); - return -TARGET_ENOSYS; -} - -long do_rt_sigreturn(CPUState *env) -{ - fprintf(stderr, "do_rt_sigreturn: not implemented\n"); - return -TARGET_ENOSYS; -} - -#elif defined(TARGET_ABI_MIPSO32) - -struct target_sigcontext { - uint32_t sc_regmask; /* Unused */ - uint32_t sc_status; - uint64_t sc_pc; - uint64_t sc_regs[32]; - uint64_t sc_fpregs[32]; - uint32_t sc_ownedfp; /* Unused */ - uint32_t sc_fpc_csr; - uint32_t sc_fpc_eir; /* Unused */ - uint32_t sc_used_math; - uint32_t sc_dsp; /* dsp status, was sc_ssflags */ - uint32_t pad0; - uint64_t sc_mdhi; - uint64_t sc_mdlo; - target_ulong sc_hi1; /* Was sc_cause */ - target_ulong sc_lo1; /* Was sc_badvaddr */ - target_ulong sc_hi2; /* Was sc_sigset[4] */ - target_ulong sc_lo2; - target_ulong sc_hi3; - target_ulong sc_lo3; -}; - -struct sigframe { - uint32_t sf_ass[4]; /* argument save space for o32 */ - uint32_t sf_code[2]; /* signal trampoline */ - struct target_sigcontext sf_sc; - target_sigset_t sf_mask; -}; - -struct target_ucontext { - target_ulong tuc_flags; - target_ulong tuc_link; - target_stack_t tuc_stack; - target_ulong pad0; - struct target_sigcontext tuc_mcontext; - target_sigset_t tuc_sigmask; -}; - -struct target_rt_sigframe { - uint32_t rs_ass[4]; /* argument save space for o32 */ - uint32_t rs_code[2]; /* signal trampoline */ - struct target_siginfo rs_info; - struct target_ucontext rs_uc; -}; - -/* Install trampoline to jump back from signal handler */ -static inline int install_sigtramp(unsigned int *tramp, unsigned int syscall) -{ - int err; - - /* - * Set up the return code ... - * - * li v0, __NR__foo_sigreturn - * syscall - */ - - err = __put_user(0x24020000 + syscall, tramp + 0); - err |= __put_user(0x0000000c , tramp + 1); - /* flush_cache_sigtramp((unsigned long) tramp); */ - return err; -} - -static inline int -setup_sigcontext(CPUState *regs, struct target_sigcontext *sc) -{ - int err = 0; - - err |= __put_user(regs->active_tc.PC, &sc->sc_pc); - -#define save_gp_reg(i) do { \ - err |= __put_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \ - } while(0) - __put_user(0, &sc->sc_regs[0]); save_gp_reg(1); save_gp_reg(2); - save_gp_reg(3); save_gp_reg(4); save_gp_reg(5); save_gp_reg(6); - save_gp_reg(7); save_gp_reg(8); save_gp_reg(9); save_gp_reg(10); - save_gp_reg(11); save_gp_reg(12); save_gp_reg(13); save_gp_reg(14); - save_gp_reg(15); save_gp_reg(16); save_gp_reg(17); save_gp_reg(18); - save_gp_reg(19); save_gp_reg(20); save_gp_reg(21); save_gp_reg(22); - save_gp_reg(23); save_gp_reg(24); save_gp_reg(25); save_gp_reg(26); - save_gp_reg(27); save_gp_reg(28); save_gp_reg(29); save_gp_reg(30); - save_gp_reg(31); -#undef save_gp_reg - - err |= __put_user(regs->active_tc.HI[0], &sc->sc_mdhi); - err |= __put_user(regs->active_tc.LO[0], &sc->sc_mdlo); - - /* Not used yet, but might be useful if we ever have DSP suppport */ -#if 0 - if (cpu_has_dsp) { - err |= __put_user(mfhi1(), &sc->sc_hi1); - err |= __put_user(mflo1(), &sc->sc_lo1); - err |= __put_user(mfhi2(), &sc->sc_hi2); - err |= __put_user(mflo2(), &sc->sc_lo2); - err |= __put_user(mfhi3(), &sc->sc_hi3); - err |= __put_user(mflo3(), &sc->sc_lo3); - err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp); - } - /* same with 64 bit */ -#ifdef CONFIG_64BIT - err |= __put_user(regs->hi, &sc->sc_hi[0]); - err |= __put_user(regs->lo, &sc->sc_lo[0]); - if (cpu_has_dsp) { - err |= __put_user(mfhi1(), &sc->sc_hi[1]); - err |= __put_user(mflo1(), &sc->sc_lo[1]); - err |= __put_user(mfhi2(), &sc->sc_hi[2]); - err |= __put_user(mflo2(), &sc->sc_lo[2]); - err |= __put_user(mfhi3(), &sc->sc_hi[3]); - err |= __put_user(mflo3(), &sc->sc_lo[3]); - err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp); - } -#endif -#endif - -#if 0 - err |= __put_user(!!used_math(), &sc->sc_used_math); - - if (!used_math()) - goto out; - - /* - * Save FPU state to signal context. Signal handler will "inherit" - * current FPU state. - */ - preempt_disable(); - - if (!is_fpu_owner()) { - own_fpu(); - restore_fp(current); - } - err |= save_fp_context(sc); - - preempt_enable(); - out: -#endif - return err; -} - -static inline int -restore_sigcontext(CPUState *regs, struct target_sigcontext *sc) -{ - int err = 0; - - err |= __get_user(regs->CP0_EPC, &sc->sc_pc); - - err |= __get_user(regs->active_tc.HI[0], &sc->sc_mdhi); - err |= __get_user(regs->active_tc.LO[0], &sc->sc_mdlo); - -#define restore_gp_reg(i) do { \ - err |= __get_user(regs->active_tc.gpr[i], &sc->sc_regs[i]); \ - } while(0) - restore_gp_reg( 1); restore_gp_reg( 2); restore_gp_reg( 3); - restore_gp_reg( 4); restore_gp_reg( 5); restore_gp_reg( 6); - restore_gp_reg( 7); restore_gp_reg( 8); restore_gp_reg( 9); - restore_gp_reg(10); restore_gp_reg(11); restore_gp_reg(12); - restore_gp_reg(13); restore_gp_reg(14); restore_gp_reg(15); - restore_gp_reg(16); restore_gp_reg(17); restore_gp_reg(18); - restore_gp_reg(19); restore_gp_reg(20); restore_gp_reg(21); - restore_gp_reg(22); restore_gp_reg(23); restore_gp_reg(24); - restore_gp_reg(25); restore_gp_reg(26); restore_gp_reg(27); - restore_gp_reg(28); restore_gp_reg(29); restore_gp_reg(30); - restore_gp_reg(31); -#undef restore_gp_reg - -#if 0 - if (cpu_has_dsp) { - err |= __get_user(treg, &sc->sc_hi1); mthi1(treg); - err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg); - err |= __get_user(treg, &sc->sc_hi2); mthi2(treg); - err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg); - err |= __get_user(treg, &sc->sc_hi3); mthi3(treg); - err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg); - err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK); - } -#ifdef CONFIG_64BIT - err |= __get_user(regs->hi, &sc->sc_hi[0]); - err |= __get_user(regs->lo, &sc->sc_lo[0]); - if (cpu_has_dsp) { - err |= __get_user(treg, &sc->sc_hi[1]); mthi1(treg); - err |= __get_user(treg, &sc->sc_lo[1]); mthi1(treg); - err |= __get_user(treg, &sc->sc_hi[2]); mthi2(treg); - err |= __get_user(treg, &sc->sc_lo[2]); mthi2(treg); - err |= __get_user(treg, &sc->sc_hi[3]); mthi3(treg); - err |= __get_user(treg, &sc->sc_lo[3]); mthi3(treg); - err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK); - } -#endif - - err |= __get_user(used_math, &sc->sc_used_math); - conditional_used_math(used_math); - - preempt_disable(); - - if (used_math()) { - /* restore fpu context if we have used it before */ - own_fpu(); - err |= restore_fp_context(sc); - } else { - /* signal handler may have used FPU. Give it up. */ - lose_fpu(); - } - - preempt_enable(); -#endif - return err; -} -/* - * Determine which stack to use.. - */ -static inline abi_ulong -get_sigframe(struct target_sigaction *ka, CPUState *regs, size_t frame_size) -{ - unsigned long sp; - - /* Default to using normal stack */ - sp = regs->active_tc.gpr[29]; - - /* - * FPU emulator may have it's own trampoline active just - * above the user stack, 16-bytes before the next lowest - * 16 byte boundary. Try to avoid trashing it. - */ - sp -= 32; - - /* This is the X/Open sanctioned signal stack switching. */ - if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) { - sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; - } - - return (sp - frame_size) & ~7; -} - -/* compare linux/arch/mips/kernel/signal.c:setup_frame() */ -static void setup_frame(int sig, struct target_sigaction * ka, - target_sigset_t *set, CPUState *regs) -{ - struct sigframe *frame; - abi_ulong frame_addr; - int i; - - frame_addr = get_sigframe(ka, regs, sizeof(*frame)); - if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) - goto give_sigsegv; - - install_sigtramp(frame->sf_code, TARGET_NR_sigreturn); - - if(setup_sigcontext(regs, &frame->sf_sc)) - goto give_sigsegv; - - for(i = 0; i < TARGET_NSIG_WORDS; i++) { - if(__put_user(set->sig[i], &frame->sf_mask.sig[i])) - goto give_sigsegv; - } - - /* - * Arguments to signal handler: - * - * a0 = signal number - * a1 = 0 (should be cause) - * a2 = pointer to struct sigcontext - * - * $25 and PC point to the signal handler, $29 points to the - * struct sigframe. - */ - regs->active_tc.gpr[ 4] = sig; - regs->active_tc.gpr[ 5] = 0; - regs->active_tc.gpr[ 6] = frame_addr + offsetof(struct sigframe, sf_sc); - regs->active_tc.gpr[29] = frame_addr; - regs->active_tc.gpr[31] = frame_addr + offsetof(struct sigframe, sf_code); - /* The original kernel code sets CP0_EPC to the handler - * since it returns to userland using eret - * we cannot do this here, and we must set PC directly */ - regs->active_tc.PC = regs->active_tc.gpr[25] = ka->_sa_handler; - unlock_user_struct(frame, frame_addr, 1); - return; - -give_sigsegv: - unlock_user_struct(frame, frame_addr, 1); - force_sig(TARGET_SIGSEGV/*, current*/); - return; -} - -long do_sigreturn(CPUState *regs) -{ - struct sigframe *frame; - abi_ulong frame_addr; - sigset_t blocked; - target_sigset_t target_set; - int i; - -#if defined(DEBUG_SIGNAL) - fprintf(stderr, "do_sigreturn\n"); -#endif - frame_addr = regs->active_tc.gpr[29]; - if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) - goto badframe; - - for(i = 0; i < TARGET_NSIG_WORDS; i++) { - if(__get_user(target_set.sig[i], &frame->sf_mask.sig[i])) - goto badframe; - } - - target_to_host_sigset_internal(&blocked, &target_set); - sigprocmask(SIG_SETMASK, &blocked, NULL); - - if (restore_sigcontext(regs, &frame->sf_sc)) - goto badframe; - -#if 0 - /* - * Don't let your children do this ... - */ - __asm__ __volatile__( - "move\t$29, %0\n\t" - "j\tsyscall_exit" - :/* no outputs */ - :"r" (®s)); - /* Unreached */ -#endif - - regs->active_tc.PC = regs->CP0_EPC; - /* I am not sure this is right, but it seems to work - * maybe a problem with nested signals ? */ - regs->CP0_EPC = 0; - return -TARGET_QEMU_ESIGRETURN; - -badframe: - force_sig(TARGET_SIGSEGV/*, current*/); - return 0; -} - -static void setup_rt_frame(int sig, struct target_sigaction *ka, - target_siginfo_t *info, - target_sigset_t *set, CPUState *env) -{ - struct target_rt_sigframe *frame; - abi_ulong frame_addr; - int i; - - frame_addr = get_sigframe(ka, env, sizeof(*frame)); - if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) - goto give_sigsegv; - - install_sigtramp(frame->rs_code, TARGET_NR_rt_sigreturn); - - copy_siginfo_to_user(&frame->rs_info, info); - - __put_user(0, &frame->rs_uc.tuc_flags); - __put_user(0, &frame->rs_uc.tuc_link); - __put_user(target_sigaltstack_used.ss_sp, &frame->rs_uc.tuc_stack.ss_sp); - __put_user(target_sigaltstack_used.ss_size, &frame->rs_uc.tuc_stack.ss_size); - __put_user(sas_ss_flags(get_sp_from_cpustate(env)), - &frame->rs_uc.tuc_stack.ss_flags); - - setup_sigcontext(env, &frame->rs_uc.tuc_mcontext); - - for(i = 0; i < TARGET_NSIG_WORDS; i++) { - __put_user(set->sig[i], &frame->rs_uc.tuc_sigmask.sig[i]); - } - - /* - * Arguments to signal handler: - * - * a0 = signal number - * a1 = pointer to struct siginfo - * a2 = pointer to struct ucontext - * - * $25 and PC point to the signal handler, $29 points to the - * struct sigframe. - */ - env->active_tc.gpr[ 4] = sig; - env->active_tc.gpr[ 5] = frame_addr - + offsetof(struct target_rt_sigframe, rs_info); - env->active_tc.gpr[ 6] = frame_addr - + offsetof(struct target_rt_sigframe, rs_uc); - env->active_tc.gpr[29] = frame_addr; - env->active_tc.gpr[31] = frame_addr - + offsetof(struct target_rt_sigframe, rs_code); - /* The original kernel code sets CP0_EPC to the handler - * since it returns to userland using eret - * we cannot do this here, and we must set PC directly */ - env->active_tc.PC = env->active_tc.gpr[25] = ka->_sa_handler; - unlock_user_struct(frame, frame_addr, 1); - return; - -give_sigsegv: - unlock_user_struct(frame, frame_addr, 1); - force_sig(TARGET_SIGSEGV/*, current*/); - return; -} - -long do_rt_sigreturn(CPUState *env) -{ - struct target_rt_sigframe *frame; - abi_ulong frame_addr; - sigset_t blocked; - -#if defined(DEBUG_SIGNAL) - fprintf(stderr, "do_rt_sigreturn\n"); -#endif - frame_addr = env->active_tc.gpr[29]; - if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) - goto badframe; - - target_to_host_sigset(&blocked, &frame->rs_uc.tuc_sigmask); - sigprocmask(SIG_SETMASK, &blocked, NULL); - - if (restore_sigcontext(env, &frame->rs_uc.tuc_mcontext)) - goto badframe; - - if (do_sigaltstack(frame_addr + - offsetof(struct target_rt_sigframe, rs_uc.tuc_stack), - 0, get_sp_from_cpustate(env)) == -EFAULT) - goto badframe; - - env->active_tc.PC = env->CP0_EPC; - /* I am not sure this is right, but it seems to work - * maybe a problem with nested signals ? */ - env->CP0_EPC = 0; - return -TARGET_QEMU_ESIGRETURN; - -badframe: - force_sig(TARGET_SIGSEGV/*, current*/); - return 0; -} - -#elif defined(TARGET_SH4) - -/* - * code and data structures from linux kernel: - * include/asm-sh/sigcontext.h - * arch/sh/kernel/signal.c - */ - -struct target_sigcontext { - target_ulong oldmask; - - /* CPU registers */ - target_ulong sc_gregs[16]; - target_ulong sc_pc; - target_ulong sc_pr; - target_ulong sc_sr; - target_ulong sc_gbr; - target_ulong sc_mach; - target_ulong sc_macl; - - /* FPU registers */ - target_ulong sc_fpregs[16]; - target_ulong sc_xfpregs[16]; - unsigned int sc_fpscr; - unsigned int sc_fpul; - unsigned int sc_ownedfp; -}; - -struct target_sigframe -{ - struct target_sigcontext sc; - target_ulong extramask[TARGET_NSIG_WORDS-1]; - uint16_t retcode[3]; -}; - - -struct target_ucontext { - target_ulong tuc_flags; - struct target_ucontext *tuc_link; - target_stack_t tuc_stack; - struct target_sigcontext tuc_mcontext; - target_sigset_t tuc_sigmask; /* mask last for extensibility */ -}; - -struct target_rt_sigframe -{ - struct target_siginfo info; - struct target_ucontext uc; - uint16_t retcode[3]; -}; - - -#define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */ -#define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */ - -static abi_ulong get_sigframe(struct target_sigaction *ka, - unsigned long sp, size_t frame_size) -{ - if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags(sp) == 0)) { - sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; - } - - return (sp - frame_size) & -8ul; -} - -static int setup_sigcontext(struct target_sigcontext *sc, - CPUState *regs, unsigned long mask) -{ - int err = 0; - int i; - -#define COPY(x) err |= __put_user(regs->x, &sc->sc_##x) - COPY(gregs[0]); COPY(gregs[1]); - COPY(gregs[2]); COPY(gregs[3]); - COPY(gregs[4]); COPY(gregs[5]); - COPY(gregs[6]); COPY(gregs[7]); - COPY(gregs[8]); COPY(gregs[9]); - COPY(gregs[10]); COPY(gregs[11]); - COPY(gregs[12]); COPY(gregs[13]); - COPY(gregs[14]); COPY(gregs[15]); - COPY(gbr); COPY(mach); - COPY(macl); COPY(pr); - COPY(sr); COPY(pc); -#undef COPY - - for (i=0; i<16; i++) { - err |= __put_user(regs->fregs[i], &sc->sc_fpregs[i]); - } - err |= __put_user(regs->fpscr, &sc->sc_fpscr); - err |= __put_user(regs->fpul, &sc->sc_fpul); - - /* non-iBCS2 extensions.. */ - err |= __put_user(mask, &sc->oldmask); - - return err; -} - -static int restore_sigcontext(CPUState *regs, struct target_sigcontext *sc, - target_ulong *r0_p) -{ - unsigned int err = 0; - int i; - -#define COPY(x) err |= __get_user(regs->x, &sc->sc_##x) - COPY(gregs[1]); - COPY(gregs[2]); COPY(gregs[3]); - COPY(gregs[4]); COPY(gregs[5]); - COPY(gregs[6]); COPY(gregs[7]); - COPY(gregs[8]); COPY(gregs[9]); - COPY(gregs[10]); COPY(gregs[11]); - COPY(gregs[12]); COPY(gregs[13]); - COPY(gregs[14]); COPY(gregs[15]); - COPY(gbr); COPY(mach); - COPY(macl); COPY(pr); - COPY(sr); COPY(pc); -#undef COPY - - for (i=0; i<16; i++) { - err |= __get_user(regs->fregs[i], &sc->sc_fpregs[i]); - } - err |= __get_user(regs->fpscr, &sc->sc_fpscr); - err |= __get_user(regs->fpul, &sc->sc_fpul); - - regs->tra = -1; /* disable syscall checks */ - err |= __get_user(*r0_p, &sc->sc_gregs[0]); - return err; -} - -static void setup_frame(int sig, struct target_sigaction *ka, - target_sigset_t *set, CPUState *regs) -{ - struct target_sigframe *frame; - abi_ulong frame_addr; - int i; - int err = 0; - int signal; - - frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame)); - if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) - goto give_sigsegv; - - signal = current_exec_domain_sig(sig); - - err |= setup_sigcontext(&frame->sc, regs, set->sig[0]); - - for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) { - err |= __put_user(set->sig[i + 1], &frame->extramask[i]); - } - - /* Set up to return from userspace. If provided, use a stub - already in userspace. */ - if (ka->sa_flags & TARGET_SA_RESTORER) { - regs->pr = (unsigned long) ka->sa_restorer; - } else { - /* Generate return code (system call to sigreturn) */ - err |= __put_user(MOVW(2), &frame->retcode[0]); - err |= __put_user(TRAP_NOARG, &frame->retcode[1]); - err |= __put_user((TARGET_NR_sigreturn), &frame->retcode[2]); - regs->pr = (unsigned long) frame->retcode; - } - - if (err) - goto give_sigsegv; - - /* Set up registers for signal handler */ - regs->gregs[15] = frame_addr; - regs->gregs[4] = signal; /* Arg for signal handler */ - regs->gregs[5] = 0; - regs->gregs[6] = frame_addr += offsetof(typeof(*frame), sc); - regs->pc = (unsigned long) ka->_sa_handler; - - unlock_user_struct(frame, frame_addr, 1); - return; - -give_sigsegv: - unlock_user_struct(frame, frame_addr, 1); - force_sig(TARGET_SIGSEGV); -} - -static void setup_rt_frame(int sig, struct target_sigaction *ka, - target_siginfo_t *info, - target_sigset_t *set, CPUState *regs) -{ - struct target_rt_sigframe *frame; - abi_ulong frame_addr; - int i; - int err = 0; - int signal; - - frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame)); - if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) - goto give_sigsegv; - - signal = current_exec_domain_sig(sig); - - err |= copy_siginfo_to_user(&frame->info, info); - - /* Create the ucontext. */ - err |= __put_user(0, &frame->uc.tuc_flags); - err |= __put_user(0, (unsigned long *)&frame->uc.tuc_link); - err |= __put_user((unsigned long)target_sigaltstack_used.ss_sp, - &frame->uc.tuc_stack.ss_sp); - err |= __put_user(sas_ss_flags(regs->gregs[15]), - &frame->uc.tuc_stack.ss_flags); - err |= __put_user(target_sigaltstack_used.ss_size, - &frame->uc.tuc_stack.ss_size); - err |= setup_sigcontext(&frame->uc.tuc_mcontext, - regs, set->sig[0]); - for(i = 0; i < TARGET_NSIG_WORDS; i++) { - err |= __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]); - } - - /* Set up to return from userspace. If provided, use a stub - already in userspace. */ - if (ka->sa_flags & TARGET_SA_RESTORER) { - regs->pr = (unsigned long) ka->sa_restorer; - } else { - /* Generate return code (system call to sigreturn) */ - err |= __put_user(MOVW(2), &frame->retcode[0]); - err |= __put_user(TRAP_NOARG, &frame->retcode[1]); - err |= __put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]); - regs->pr = (unsigned long) frame->retcode; - } - - if (err) - goto give_sigsegv; - - /* Set up registers for signal handler */ - regs->gregs[15] = frame_addr; - regs->gregs[4] = signal; /* Arg for signal handler */ - regs->gregs[5] = frame_addr + offsetof(typeof(*frame), info); - regs->gregs[6] = frame_addr + offsetof(typeof(*frame), uc); - regs->pc = (unsigned long) ka->_sa_handler; - - unlock_user_struct(frame, frame_addr, 1); - return; - -give_sigsegv: - unlock_user_struct(frame, frame_addr, 1); - force_sig(TARGET_SIGSEGV); -} - -long do_sigreturn(CPUState *regs) -{ - struct target_sigframe *frame; - abi_ulong frame_addr; - sigset_t blocked; - target_sigset_t target_set; - target_ulong r0; - int i; - int err = 0; - -#if defined(DEBUG_SIGNAL) - fprintf(stderr, "do_sigreturn\n"); -#endif - frame_addr = regs->gregs[15]; - if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) - goto badframe; - - err |= __get_user(target_set.sig[0], &frame->sc.oldmask); - for(i = 1; i < TARGET_NSIG_WORDS; i++) { - err |= (__get_user(target_set.sig[i], &frame->extramask[i - 1])); - } - - if (err) - goto badframe; - - target_to_host_sigset_internal(&blocked, &target_set); - sigprocmask(SIG_SETMASK, &blocked, NULL); - - if (restore_sigcontext(regs, &frame->sc, &r0)) - goto badframe; - - unlock_user_struct(frame, frame_addr, 0); - return r0; - -badframe: - unlock_user_struct(frame, frame_addr, 0); - force_sig(TARGET_SIGSEGV); - return 0; -} - -long do_rt_sigreturn(CPUState *regs) -{ - struct target_rt_sigframe *frame; - abi_ulong frame_addr; - sigset_t blocked; - target_ulong r0; - -#if defined(DEBUG_SIGNAL) - fprintf(stderr, "do_rt_sigreturn\n"); -#endif - frame_addr = regs->gregs[15]; - if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) - goto badframe; - - target_to_host_sigset(&blocked, &frame->uc.tuc_sigmask); - sigprocmask(SIG_SETMASK, &blocked, NULL); - - if (restore_sigcontext(regs, &frame->uc.tuc_mcontext, &r0)) - goto badframe; - - if (do_sigaltstack(frame_addr + - offsetof(struct target_rt_sigframe, uc.tuc_stack), - 0, get_sp_from_cpustate(regs)) == -EFAULT) - goto badframe; - - unlock_user_struct(frame, frame_addr, 0); - return r0; - -badframe: - unlock_user_struct(frame, frame_addr, 0); - force_sig(TARGET_SIGSEGV); - return 0; -} -#elif defined(TARGET_MICROBLAZE) - -struct target_sigcontext { - struct target_pt_regs regs; /* needs to be first */ - uint32_t oldmask; -}; - -struct target_stack_t { - abi_ulong ss_sp; - int ss_flags; - unsigned int ss_size; -}; - -struct target_ucontext { - abi_ulong tuc_flags; - abi_ulong tuc_link; - struct target_stack_t tuc_stack; - struct target_sigcontext tuc_mcontext; - uint32_t tuc_extramask[TARGET_NSIG_WORDS - 1]; -}; - -/* Signal frames. */ -struct target_signal_frame { - struct target_ucontext uc; - uint32_t extramask[TARGET_NSIG_WORDS - 1]; - uint32_t tramp[2]; -}; - -struct rt_signal_frame { - struct siginfo info; - struct ucontext uc; - uint32_t tramp[2]; -}; - -static void setup_sigcontext(struct target_sigcontext *sc, CPUState *env) -{ - __put_user(env->regs[0], &sc->regs.r0); - __put_user(env->regs[1], &sc->regs.r1); - __put_user(env->regs[2], &sc->regs.r2); - __put_user(env->regs[3], &sc->regs.r3); - __put_user(env->regs[4], &sc->regs.r4); - __put_user(env->regs[5], &sc->regs.r5); - __put_user(env->regs[6], &sc->regs.r6); - __put_user(env->regs[7], &sc->regs.r7); - __put_user(env->regs[8], &sc->regs.r8); - __put_user(env->regs[9], &sc->regs.r9); - __put_user(env->regs[10], &sc->regs.r10); - __put_user(env->regs[11], &sc->regs.r11); - __put_user(env->regs[12], &sc->regs.r12); - __put_user(env->regs[13], &sc->regs.r13); - __put_user(env->regs[14], &sc->regs.r14); - __put_user(env->regs[15], &sc->regs.r15); - __put_user(env->regs[16], &sc->regs.r16); - __put_user(env->regs[17], &sc->regs.r17); - __put_user(env->regs[18], &sc->regs.r18); - __put_user(env->regs[19], &sc->regs.r19); - __put_user(env->regs[20], &sc->regs.r20); - __put_user(env->regs[21], &sc->regs.r21); - __put_user(env->regs[22], &sc->regs.r22); - __put_user(env->regs[23], &sc->regs.r23); - __put_user(env->regs[24], &sc->regs.r24); - __put_user(env->regs[25], &sc->regs.r25); - __put_user(env->regs[26], &sc->regs.r26); - __put_user(env->regs[27], &sc->regs.r27); - __put_user(env->regs[28], &sc->regs.r28); - __put_user(env->regs[29], &sc->regs.r29); - __put_user(env->regs[30], &sc->regs.r30); - __put_user(env->regs[31], &sc->regs.r31); - __put_user(env->sregs[SR_PC], &sc->regs.pc); -} - -static void restore_sigcontext(struct target_sigcontext *sc, CPUState *env) -{ - __get_user(env->regs[0], &sc->regs.r0); - __get_user(env->regs[1], &sc->regs.r1); - __get_user(env->regs[2], &sc->regs.r2); - __get_user(env->regs[3], &sc->regs.r3); - __get_user(env->regs[4], &sc->regs.r4); - __get_user(env->regs[5], &sc->regs.r5); - __get_user(env->regs[6], &sc->regs.r6); - __get_user(env->regs[7], &sc->regs.r7); - __get_user(env->regs[8], &sc->regs.r8); - __get_user(env->regs[9], &sc->regs.r9); - __get_user(env->regs[10], &sc->regs.r10); - __get_user(env->regs[11], &sc->regs.r11); - __get_user(env->regs[12], &sc->regs.r12); - __get_user(env->regs[13], &sc->regs.r13); - __get_user(env->regs[14], &sc->regs.r14); - __get_user(env->regs[15], &sc->regs.r15); - __get_user(env->regs[16], &sc->regs.r16); - __get_user(env->regs[17], &sc->regs.r17); - __get_user(env->regs[18], &sc->regs.r18); - __get_user(env->regs[19], &sc->regs.r19); - __get_user(env->regs[20], &sc->regs.r20); - __get_user(env->regs[21], &sc->regs.r21); - __get_user(env->regs[22], &sc->regs.r22); - __get_user(env->regs[23], &sc->regs.r23); - __get_user(env->regs[24], &sc->regs.r24); - __get_user(env->regs[25], &sc->regs.r25); - __get_user(env->regs[26], &sc->regs.r26); - __get_user(env->regs[27], &sc->regs.r27); - __get_user(env->regs[28], &sc->regs.r28); - __get_user(env->regs[29], &sc->regs.r29); - __get_user(env->regs[30], &sc->regs.r30); - __get_user(env->regs[31], &sc->regs.r31); - __get_user(env->sregs[SR_PC], &sc->regs.pc); -} - -static abi_ulong get_sigframe(struct target_sigaction *ka, - CPUState *env, int frame_size) -{ - abi_ulong sp = env->regs[1]; - - if ((ka->sa_flags & SA_ONSTACK) != 0 && !on_sig_stack(sp)) - sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; - - return ((sp - frame_size) & -8UL); -} - -static void setup_frame(int sig, struct target_sigaction *ka, - target_sigset_t *set, CPUState *env) -{ - struct target_signal_frame *frame; - abi_ulong frame_addr; - int err = 0; - int i; - - frame_addr = get_sigframe(ka, env, sizeof *frame); - if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) - goto badframe; - - /* Save the mask. */ - err |= __put_user(set->sig[0], &frame->uc.tuc_mcontext.oldmask); - if (err) - goto badframe; - - for(i = 1; i < TARGET_NSIG_WORDS; i++) { - if (__put_user(set->sig[i], &frame->extramask[i - 1])) - goto badframe; - } - - setup_sigcontext(&frame->uc.tuc_mcontext, env); - - /* Set up to return from userspace. If provided, use a stub - already in userspace. */ - /* minus 8 is offset to cater for "rtsd r15,8" offset */ - if (ka->sa_flags & TARGET_SA_RESTORER) { - env->regs[15] = ((unsigned long)ka->sa_restorer)-8; - } else { - uint32_t t; - /* Note, these encodings are _big endian_! */ - /* addi r12, r0, __NR_sigreturn */ - t = 0x31800000UL | TARGET_NR_sigreturn; - err |= __put_user(t, frame->tramp + 0); - /* brki r14, 0x8 */ - t = 0xb9cc0008UL; - err |= __put_user(t, frame->tramp + 1); - - /* Return from sighandler will jump to the tramp. - Negative 8 offset because return is rtsd r15, 8 */ - env->regs[15] = ((unsigned long)frame->tramp) - 8; - } - - if (err) - goto badframe; - - /* Set up registers for signal handler */ - env->regs[1] = frame_addr; - /* Signal handler args: */ - env->regs[5] = sig; /* Arg 0: signum */ - env->regs[6] = 0; - /* arg 1: sigcontext */ - env->regs[7] = frame_addr += offsetof(typeof(*frame), uc); - - /* Offset of 4 to handle microblaze rtid r14, 0 */ - env->sregs[SR_PC] = (unsigned long)ka->_sa_handler; - - unlock_user_struct(frame, frame_addr, 1); - return; - badframe: - unlock_user_struct(frame, frame_addr, 1); - force_sig(TARGET_SIGSEGV); -} - -static void setup_rt_frame(int sig, struct target_sigaction *ka, - target_siginfo_t *info, - target_sigset_t *set, CPUState *env) -{ - fprintf(stderr, "Microblaze setup_rt_frame: not implemented\n"); -} - -long do_sigreturn(CPUState *env) -{ - struct target_signal_frame *frame; - abi_ulong frame_addr; - target_sigset_t target_set; - sigset_t set; - int i; - - frame_addr = env->regs[R_SP]; - /* Make sure the guest isn't playing games. */ - if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) - goto badframe; - - /* Restore blocked signals */ - if (__get_user(target_set.sig[0], &frame->uc.tuc_mcontext.oldmask)) - goto badframe; - for(i = 1; i < TARGET_NSIG_WORDS; i++) { - if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) - goto badframe; - } - target_to_host_sigset_internal(&set, &target_set); - sigprocmask(SIG_SETMASK, &set, NULL); - - restore_sigcontext(&frame->uc.tuc_mcontext, env); - /* We got here through a sigreturn syscall, our path back is via an - rtb insn so setup r14 for that. */ - env->regs[14] = env->sregs[SR_PC]; - - unlock_user_struct(frame, frame_addr, 0); - return env->regs[10]; - badframe: - unlock_user_struct(frame, frame_addr, 0); - force_sig(TARGET_SIGSEGV); -} - -long do_rt_sigreturn(CPUState *env) -{ - fprintf(stderr, "Microblaze do_rt_sigreturn: not implemented\n"); - return -TARGET_ENOSYS; -} - -#elif defined(TARGET_CRIS) - -struct target_sigcontext { - struct target_pt_regs regs; /* needs to be first */ - uint32_t oldmask; - uint32_t usp; /* usp before stacking this gunk on it */ -}; - -/* Signal frames. */ -struct target_signal_frame { - struct target_sigcontext sc; - uint32_t extramask[TARGET_NSIG_WORDS - 1]; - uint8_t retcode[8]; /* Trampoline code. */ -}; - -struct rt_signal_frame { - struct siginfo *pinfo; - void *puc; - struct siginfo info; - struct ucontext uc; - uint8_t retcode[8]; /* Trampoline code. */ -}; - -static void setup_sigcontext(struct target_sigcontext *sc, CPUState *env) -{ - __put_user(env->regs[0], &sc->regs.r0); - __put_user(env->regs[1], &sc->regs.r1); - __put_user(env->regs[2], &sc->regs.r2); - __put_user(env->regs[3], &sc->regs.r3); - __put_user(env->regs[4], &sc->regs.r4); - __put_user(env->regs[5], &sc->regs.r5); - __put_user(env->regs[6], &sc->regs.r6); - __put_user(env->regs[7], &sc->regs.r7); - __put_user(env->regs[8], &sc->regs.r8); - __put_user(env->regs[9], &sc->regs.r9); - __put_user(env->regs[10], &sc->regs.r10); - __put_user(env->regs[11], &sc->regs.r11); - __put_user(env->regs[12], &sc->regs.r12); - __put_user(env->regs[13], &sc->regs.r13); - __put_user(env->regs[14], &sc->usp); - __put_user(env->regs[15], &sc->regs.acr); - __put_user(env->pregs[PR_MOF], &sc->regs.mof); - __put_user(env->pregs[PR_SRP], &sc->regs.srp); - __put_user(env->pc, &sc->regs.erp); -} - -static void restore_sigcontext(struct target_sigcontext *sc, CPUState *env) -{ - __get_user(env->regs[0], &sc->regs.r0); - __get_user(env->regs[1], &sc->regs.r1); - __get_user(env->regs[2], &sc->regs.r2); - __get_user(env->regs[3], &sc->regs.r3); - __get_user(env->regs[4], &sc->regs.r4); - __get_user(env->regs[5], &sc->regs.r5); - __get_user(env->regs[6], &sc->regs.r6); - __get_user(env->regs[7], &sc->regs.r7); - __get_user(env->regs[8], &sc->regs.r8); - __get_user(env->regs[9], &sc->regs.r9); - __get_user(env->regs[10], &sc->regs.r10); - __get_user(env->regs[11], &sc->regs.r11); - __get_user(env->regs[12], &sc->regs.r12); - __get_user(env->regs[13], &sc->regs.r13); - __get_user(env->regs[14], &sc->usp); - __get_user(env->regs[15], &sc->regs.acr); - __get_user(env->pregs[PR_MOF], &sc->regs.mof); - __get_user(env->pregs[PR_SRP], &sc->regs.srp); - __get_user(env->pc, &sc->regs.erp); -} - -static abi_ulong get_sigframe(CPUState *env, int framesize) -{ - abi_ulong sp; - /* Align the stack downwards to 4. */ - sp = (env->regs[R_SP] & ~3); - return sp - framesize; -} - -static void setup_frame(int sig, struct target_sigaction *ka, - target_sigset_t *set, CPUState *env) -{ - struct target_signal_frame *frame; - abi_ulong frame_addr; - int err = 0; - int i; - - frame_addr = get_sigframe(env, sizeof *frame); - if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) - goto badframe; - - /* - * The CRIS signal return trampoline. A real linux/CRIS kernel doesn't - * use this trampoline anymore but it sets it up for GDB. - * In QEMU, using the trampoline simplifies things a bit so we use it. - * - * This is movu.w __NR_sigreturn, r9; break 13; - */ - err |= __put_user(0x9c5f, frame->retcode+0); - err |= __put_user(TARGET_NR_sigreturn, - frame->retcode+2); - err |= __put_user(0xe93d, frame->retcode+4); - - /* Save the mask. */ - err |= __put_user(set->sig[0], &frame->sc.oldmask); - if (err) - goto badframe; - - for(i = 1; i < TARGET_NSIG_WORDS; i++) { - if (__put_user(set->sig[i], &frame->extramask[i - 1])) - goto badframe; - } - - setup_sigcontext(&frame->sc, env); - - /* Move the stack and setup the arguments for the handler. */ - env->regs[R_SP] = frame_addr; - env->regs[10] = sig; - env->pc = (unsigned long) ka->_sa_handler; - /* Link SRP so the guest returns through the trampoline. */ - env->pregs[PR_SRP] = frame_addr + offsetof(typeof(*frame), retcode); - - unlock_user_struct(frame, frame_addr, 1); - return; - badframe: - unlock_user_struct(frame, frame_addr, 1); - force_sig(TARGET_SIGSEGV); -} - -static void setup_rt_frame(int sig, struct target_sigaction *ka, - target_siginfo_t *info, - target_sigset_t *set, CPUState *env) -{ - fprintf(stderr, "CRIS setup_rt_frame: not implemented\n"); -} - -long do_sigreturn(CPUState *env) -{ - struct target_signal_frame *frame; - abi_ulong frame_addr; - target_sigset_t target_set; - sigset_t set; - int i; - - frame_addr = env->regs[R_SP]; - /* Make sure the guest isn't playing games. */ - if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) - goto badframe; - - /* Restore blocked signals */ - if (__get_user(target_set.sig[0], &frame->sc.oldmask)) - goto badframe; - for(i = 1; i < TARGET_NSIG_WORDS; i++) { - if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) - goto badframe; - } - target_to_host_sigset_internal(&set, &target_set); - sigprocmask(SIG_SETMASK, &set, NULL); - - restore_sigcontext(&frame->sc, env); - unlock_user_struct(frame, frame_addr, 0); - return env->regs[10]; - badframe: - unlock_user_struct(frame, frame_addr, 0); - force_sig(TARGET_SIGSEGV); -} - -long do_rt_sigreturn(CPUState *env) -{ - fprintf(stderr, "CRIS do_rt_sigreturn: not implemented\n"); - return -TARGET_ENOSYS; -} - -#elif defined(TARGET_S390X) - -#define __NUM_GPRS 16 -#define __NUM_FPRS 16 -#define __NUM_ACRS 16 - -#define S390_SYSCALL_SIZE 2 -#define __SIGNAL_FRAMESIZE 160 /* FIXME: 31-bit mode -> 96 */ - -#define _SIGCONTEXT_NSIG 64 -#define _SIGCONTEXT_NSIG_BPW 64 /* FIXME: 31-bit mode -> 32 */ -#define _SIGCONTEXT_NSIG_WORDS (_SIGCONTEXT_NSIG / _SIGCONTEXT_NSIG_BPW) -#define _SIGMASK_COPY_SIZE (sizeof(unsigned long)*_SIGCONTEXT_NSIG_WORDS) -#define PSW_ADDR_AMODE 0x0000000000000000UL /* 0x80000000UL for 31-bit */ -#define S390_SYSCALL_OPCODE ((uint16_t)0x0a00) - -typedef struct { - target_psw_t psw; - target_ulong gprs[__NUM_GPRS]; - unsigned int acrs[__NUM_ACRS]; -} target_s390_regs_common; - -typedef struct { - unsigned int fpc; - double fprs[__NUM_FPRS]; -} target_s390_fp_regs; - -typedef struct { - target_s390_regs_common regs; - target_s390_fp_regs fpregs; -} target_sigregs; - -struct target_sigcontext { - target_ulong oldmask[_SIGCONTEXT_NSIG_WORDS]; - target_sigregs *sregs; -}; - -typedef struct { - uint8_t callee_used_stack[__SIGNAL_FRAMESIZE]; - struct 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; - target_stack_t tuc_stack; - target_sigregs tuc_mcontext; - target_sigset_t tuc_sigmask; /* mask last for extensibility */ -}; - -typedef struct { - uint8_t callee_used_stack[__SIGNAL_FRAMESIZE]; - uint8_t retcode[S390_SYSCALL_SIZE]; - struct target_siginfo info; - struct target_ucontext uc; -} rt_sigframe; - -static inline abi_ulong -get_sigframe(struct target_sigaction *ka, CPUState *env, size_t frame_size) -{ - abi_ulong sp; - - /* Default to using normal stack */ - sp = env->regs[15]; - - /* This is the X/Open sanctioned signal stack switching. */ - if (ka->sa_flags & TARGET_SA_ONSTACK) { - if (!sas_ss_flags(sp)) { - sp = target_sigaltstack_used.ss_sp + - target_sigaltstack_used.ss_size; - } - } - - /* This is the legacy signal stack switching. */ - else if (/* FIXME !user_mode(regs) */ 0 && - !(ka->sa_flags & TARGET_SA_RESTORER) && - ka->sa_restorer) { - sp = (abi_ulong) ka->sa_restorer; - } - - return (sp - frame_size) & -8ul; -} - -static void save_sigregs(CPUState *env, target_sigregs *sregs) -{ - int i; - //save_access_regs(current->thread.acrs); FIXME - - /* Copy a 'clean' PSW mask to the user to avoid leaking - information about whether PER is currently on. */ - __put_user(env->psw.mask, &sregs->regs.psw.mask); - __put_user(env->psw.addr, &sregs->regs.psw.addr); - for (i = 0; i < 16; i++) { - __put_user(env->regs[i], &sregs->regs.gprs[i]); - } - for (i = 0; i < 16; i++) { - __put_user(env->aregs[i], &sregs->regs.acrs[i]); - } - /* - * We have to store the fp registers to current->thread.fp_regs - * to merge them with the emulated registers. - */ - //save_fp_regs(¤t->thread.fp_regs); FIXME - for (i = 0; i < 16; i++) { - __put_user(env->fregs[i].ll, &sregs->fpregs.fprs[i]); - } -} - -static void setup_frame(int sig, struct target_sigaction *ka, - target_sigset_t *set, CPUState *env) -{ - sigframe *frame; - abi_ulong frame_addr; - - frame_addr = get_sigframe(ka, env, sizeof(*frame)); - qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__, - (unsigned long long)frame_addr); - if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) { - goto give_sigsegv; - } - - qemu_log("%s: 1\n", __FUNCTION__); - if (__put_user(set->sig[0], &frame->sc.oldmask[0])) { - goto give_sigsegv; - } - - save_sigregs(env, &frame->sregs); - - __put_user((abi_ulong)(unsigned long)&frame->sregs, - (abi_ulong *)&frame->sc.sregs); - - /* Set up to return from userspace. If provided, use a stub - already in userspace. */ - if (ka->sa_flags & TARGET_SA_RESTORER) { - env->regs[14] = (unsigned long) - ka->sa_restorer | PSW_ADDR_AMODE; - } else { - env->regs[14] = (unsigned long) - frame->retcode | PSW_ADDR_AMODE; - if (__put_user(S390_SYSCALL_OPCODE | TARGET_NR_sigreturn, - (uint16_t *)(frame->retcode))) - goto give_sigsegv; - } - - /* Set up backchain. */ - if (__put_user(env->regs[15], (abi_ulong *) frame)) { - goto give_sigsegv; - } - - /* Set up registers for signal handler */ - env->regs[15] = frame_addr; - env->psw.addr = (target_ulong) ka->_sa_handler | PSW_ADDR_AMODE; - - env->regs[2] = sig; //map_signal(sig); - env->regs[3] = frame_addr += offsetof(typeof(*frame), sc); - - /* We forgot to include these in the sigcontext. - To avoid breaking binary compatibility, they are passed as args. */ - env->regs[4] = 0; // FIXME: no clue... current->thread.trap_no; - env->regs[5] = 0; // FIXME: no clue... current->thread.prot_addr; - - /* Place signal number on stack to allow backtrace from handler. */ - if (__put_user(env->regs[2], (int *) &frame->signo)) { - goto give_sigsegv; - } - unlock_user_struct(frame, frame_addr, 1); - return; - -give_sigsegv: - qemu_log("%s: give_sigsegv\n", __FUNCTION__); - unlock_user_struct(frame, frame_addr, 1); - force_sig(TARGET_SIGSEGV); -} - -static void setup_rt_frame(int sig, struct target_sigaction *ka, - target_siginfo_t *info, - target_sigset_t *set, CPUState *env) -{ - int i; - rt_sigframe *frame; - abi_ulong frame_addr; - - frame_addr = get_sigframe(ka, env, sizeof *frame); - qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__, - (unsigned long long)frame_addr); - if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) { - goto give_sigsegv; - } - - qemu_log("%s: 1\n", __FUNCTION__); - if (copy_siginfo_to_user(&frame->info, info)) { - goto give_sigsegv; - } - - /* Create the ucontext. */ - __put_user(0, &frame->uc.tuc_flags); - __put_user((abi_ulong)0, (abi_ulong *)&frame->uc.tuc_link); - __put_user(target_sigaltstack_used.ss_sp, &frame->uc.tuc_stack.ss_sp); - __put_user(sas_ss_flags(get_sp_from_cpustate(env)), - &frame->uc.tuc_stack.ss_flags); - __put_user(target_sigaltstack_used.ss_size, &frame->uc.tuc_stack.ss_size); - save_sigregs(env, &frame->uc.tuc_mcontext); - for (i = 0; i < TARGET_NSIG_WORDS; i++) { - __put_user((abi_ulong)set->sig[i], - (abi_ulong *)&frame->uc.tuc_sigmask.sig[i]); - } - - /* Set up to return from userspace. If provided, use a stub - already in userspace. */ - if (ka->sa_flags & TARGET_SA_RESTORER) { - env->regs[14] = (unsigned long) ka->sa_restorer | PSW_ADDR_AMODE; - } else { - env->regs[14] = (unsigned long) frame->retcode | PSW_ADDR_AMODE; - if (__put_user(S390_SYSCALL_OPCODE | TARGET_NR_rt_sigreturn, - (uint16_t *)(frame->retcode))) { - goto give_sigsegv; - } - } - - /* Set up backchain. */ - if (__put_user(env->regs[15], (abi_ulong *) frame)) { - goto give_sigsegv; - } - - /* Set up registers for signal handler */ - env->regs[15] = frame_addr; - env->psw.addr = (target_ulong) ka->_sa_handler | PSW_ADDR_AMODE; - - env->regs[2] = sig; //map_signal(sig); - env->regs[3] = frame_addr + offsetof(typeof(*frame), info); - env->regs[4] = frame_addr + offsetof(typeof(*frame), uc); - return; - -give_sigsegv: - qemu_log("%s: give_sigsegv\n", __FUNCTION__); - unlock_user_struct(frame, frame_addr, 1); - force_sig(TARGET_SIGSEGV); -} - -static int -restore_sigregs(CPUState *env, target_sigregs *sc) -{ - int err = 0; - int i; - - for (i = 0; i < 16; i++) { - err |= __get_user(env->regs[i], &sc->regs.gprs[i]); - } - - err |= __get_user(env->psw.mask, &sc->regs.psw.mask); - qemu_log("%s: sc->regs.psw.addr 0x%llx env->psw.addr 0x%llx\n", - __FUNCTION__, (unsigned long long)sc->regs.psw.addr, - (unsigned long long)env->psw.addr); - err |= __get_user(env->psw.addr, &sc->regs.psw.addr); - /* FIXME: 31-bit -> | PSW_ADDR_AMODE */ - - for (i = 0; i < 16; i++) { - err |= __get_user(env->aregs[i], &sc->regs.acrs[i]); - } - for (i = 0; i < 16; i++) { - err |= __get_user(env->fregs[i].ll, &sc->fpregs.fprs[i]); - } - - return err; -} - -long do_sigreturn(CPUState *env) -{ - sigframe *frame; - abi_ulong frame_addr = env->regs[15]; - qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__, - (unsigned long long)frame_addr); - target_sigset_t target_set; - sigset_t set; - if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) { - goto badframe; - } - if (__get_user(target_set.sig[0], &frame->sc.oldmask[0])) { - goto badframe; - } - - target_to_host_sigset_internal(&set, &target_set); - sigprocmask(SIG_SETMASK, &set, NULL); /* ~_BLOCKABLE? */ - - if (restore_sigregs(env, &frame->sregs)) { - goto badframe; - } - - unlock_user_struct(frame, frame_addr, 0); - return env->regs[2]; - -badframe: - unlock_user_struct(frame, frame_addr, 0); - force_sig(TARGET_SIGSEGV); - return 0; -} - -long do_rt_sigreturn(CPUState *env) -{ - rt_sigframe *frame; - abi_ulong frame_addr = env->regs[15]; - qemu_log("%s: frame_addr 0x%llx\n", __FUNCTION__, - (unsigned long long)frame_addr); - sigset_t set; - - if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) { - goto badframe; - } - target_to_host_sigset(&set, &frame->uc.tuc_sigmask); - - sigprocmask(SIG_SETMASK, &set, NULL); /* ~_BLOCKABLE? */ - - if (restore_sigregs(env, &frame->uc.tuc_mcontext)) { - goto badframe; - } - if (do_sigaltstack(frame_addr + offsetof(rt_sigframe, uc.tuc_stack), 0, - get_sp_from_cpustate(env)) == -EFAULT) { - goto badframe; - } - unlock_user_struct(frame, frame_addr, 0); - return env->regs[2]; - -badframe: - unlock_user_struct(frame, frame_addr, 0); - force_sig(TARGET_SIGSEGV); - return 0; -} - -#elif defined(TARGET_PPC) && !defined(TARGET_PPC64) - -/* FIXME: Many of the structures are defined for both PPC and PPC64, but - the signal handling is different enough that we haven't implemented - support for PPC64 yet. Hence the restriction above. - - There are various #if'd blocks for code for TARGET_PPC64. These - blocks should go away so that we can successfully run 32-bit and - 64-bit binaries on a QEMU configured for PPC64. */ - -/* Size of dummy stack frame allocated when calling signal handler. - See arch/powerpc/include/asm/ptrace.h. */ -#if defined(TARGET_PPC64) -#define SIGNAL_FRAMESIZE 128 -#else -#define SIGNAL_FRAMESIZE 64 -#endif - -/* See arch/powerpc/include/asm/sigcontext.h. */ -struct target_sigcontext { - target_ulong _unused[4]; - int32_t signal; -#if defined(TARGET_PPC64) - int32_t pad0; -#endif - target_ulong handler; - target_ulong oldmask; - target_ulong regs; /* struct pt_regs __user * */ - /* TODO: PPC64 includes extra bits here. */ -}; - -/* Indices for target_mcontext.mc_gregs, below. - See arch/powerpc/include/asm/ptrace.h for details. */ -enum { - TARGET_PT_R0 = 0, - TARGET_PT_R1 = 1, - TARGET_PT_R2 = 2, - TARGET_PT_R3 = 3, - TARGET_PT_R4 = 4, - TARGET_PT_R5 = 5, - TARGET_PT_R6 = 6, - TARGET_PT_R7 = 7, - TARGET_PT_R8 = 8, - TARGET_PT_R9 = 9, - TARGET_PT_R10 = 10, - TARGET_PT_R11 = 11, - TARGET_PT_R12 = 12, - TARGET_PT_R13 = 13, - TARGET_PT_R14 = 14, - TARGET_PT_R15 = 15, - TARGET_PT_R16 = 16, - TARGET_PT_R17 = 17, - TARGET_PT_R18 = 18, - TARGET_PT_R19 = 19, - TARGET_PT_R20 = 20, - TARGET_PT_R21 = 21, - TARGET_PT_R22 = 22, - TARGET_PT_R23 = 23, - TARGET_PT_R24 = 24, - TARGET_PT_R25 = 25, - TARGET_PT_R26 = 26, - TARGET_PT_R27 = 27, - TARGET_PT_R28 = 28, - TARGET_PT_R29 = 29, - TARGET_PT_R30 = 30, - TARGET_PT_R31 = 31, - TARGET_PT_NIP = 32, - TARGET_PT_MSR = 33, - TARGET_PT_ORIG_R3 = 34, - TARGET_PT_CTR = 35, - TARGET_PT_LNK = 36, - TARGET_PT_XER = 37, - TARGET_PT_CCR = 38, - /* Yes, there are two registers with #39. One is 64-bit only. */ - TARGET_PT_MQ = 39, - TARGET_PT_SOFTE = 39, - TARGET_PT_TRAP = 40, - TARGET_PT_DAR = 41, - TARGET_PT_DSISR = 42, - TARGET_PT_RESULT = 43, - TARGET_PT_REGS_COUNT = 44 -}; - -/* See arch/powerpc/include/asm/ucontext.h. Only used for 32-bit PPC; - on 64-bit PPC, sigcontext and mcontext are one and the same. */ -struct target_mcontext { - target_ulong mc_gregs[48]; - /* Includes fpscr. */ - uint64_t mc_fregs[33]; - target_ulong mc_pad[2]; - /* We need to handle Altivec and SPE at the same time, which no - kernel needs to do. Fortunately, the kernel defines this bit to - be Altivec-register-large all the time, rather than trying to - twiddle it based on the specific platform. */ - union { - /* SPE vector registers. One extra for SPEFSCR. */ - uint32_t spe[33]; - /* Altivec vector registers. The packing of VSCR and VRSAVE - varies depending on whether we're PPC64 or not: PPC64 splits - them apart; PPC32 stuffs them together. */ -#if defined(TARGET_PPC64) -#define QEMU_NVRREG 34 -#else -#define QEMU_NVRREG 33 -#endif - ppc_avr_t altivec[QEMU_NVRREG]; -#undef QEMU_NVRREG - } mc_vregs __attribute__((__aligned__(16))); -}; - -struct target_ucontext { - target_ulong tuc_flags; - target_ulong tuc_link; /* struct ucontext __user * */ - struct target_sigaltstack tuc_stack; -#if !defined(TARGET_PPC64) - int32_t tuc_pad[7]; - target_ulong tuc_regs; /* struct mcontext __user * - points to uc_mcontext field */ -#endif - target_sigset_t tuc_sigmask; -#if defined(TARGET_PPC64) - target_sigset_t unused[15]; /* Allow for uc_sigmask growth */ - struct target_sigcontext tuc_mcontext; -#else - int32_t tuc_maskext[30]; - int32_t tuc_pad2[3]; - struct target_mcontext tuc_mcontext; -#endif -}; - -/* See arch/powerpc/kernel/signal_32.c. */ -struct target_sigframe { - struct target_sigcontext sctx; - struct target_mcontext mctx; - int32_t abigap[56]; -}; - -struct target_rt_sigframe { - struct target_siginfo info; - struct target_ucontext uc; - int32_t abigap[56]; -}; - -/* We use the mc_pad field for the signal return trampoline. */ -#define tramp mc_pad - -/* See arch/powerpc/kernel/signal.c. */ -static target_ulong get_sigframe(struct target_sigaction *ka, - CPUState *env, - int frame_size) -{ - target_ulong oldsp, newsp; - - oldsp = env->gpr[1]; - - if ((ka->sa_flags & TARGET_SA_ONSTACK) && - (sas_ss_flags(oldsp))) { - oldsp = (target_sigaltstack_used.ss_sp - + target_sigaltstack_used.ss_size); - } - - newsp = (oldsp - frame_size) & ~0xFUL; - - return newsp; -} - -static int save_user_regs(CPUState *env, struct target_mcontext *frame, - int sigret) -{ - target_ulong msr = env->msr; - int i; - target_ulong ccr = 0; - - /* In general, the kernel attempts to be intelligent about what it - needs to save for Altivec/FP/SPE registers. We don't care that - much, so we just go ahead and save everything. */ - - /* Save general registers. */ - for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { - if (__put_user(env->gpr[i], &frame->mc_gregs[i])) { - return 1; - } - } - if (__put_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP]) - || __put_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR]) - || __put_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK]) - || __put_user(env->xer, &frame->mc_gregs[TARGET_PT_XER])) - return 1; - - for (i = 0; i < ARRAY_SIZE(env->crf); i++) { - ccr |= env->crf[i] << (32 - ((i + 1) * 4)); - } - if (__put_user(ccr, &frame->mc_gregs[TARGET_PT_CCR])) - return 1; - - /* Save Altivec registers if necessary. */ - if (env->insns_flags & PPC_ALTIVEC) { - for (i = 0; i < ARRAY_SIZE(env->avr); i++) { - ppc_avr_t *avr = &env->avr[i]; - ppc_avr_t *vreg = &frame->mc_vregs.altivec[i]; - - if (__put_user(avr->u64[0], &vreg->u64[0]) || - __put_user(avr->u64[1], &vreg->u64[1])) { - return 1; - } - } - /* Set MSR_VR in the saved MSR value to indicate that - frame->mc_vregs contains valid data. */ - msr |= MSR_VR; - if (__put_user((uint32_t)env->spr[SPR_VRSAVE], - &frame->mc_vregs.altivec[32].u32[3])) - return 1; - } - - /* Save floating point registers. */ - if (env->insns_flags & PPC_FLOAT) { - for (i = 0; i < ARRAY_SIZE(env->fpr); i++) { - if (__put_user(env->fpr[i], &frame->mc_fregs[i])) { - return 1; - } - } - if (__put_user((uint64_t) env->fpscr, &frame->mc_fregs[32])) - return 1; - } - - /* Save SPE registers. The kernel only saves the high half. */ - if (env->insns_flags & PPC_SPE) { -#if defined(TARGET_PPC64) - for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { - if (__put_user(env->gpr[i] >> 32, &frame->mc_vregs.spe[i])) { - return 1; - } - } -#else - for (i = 0; i < ARRAY_SIZE(env->gprh); i++) { - if (__put_user(env->gprh[i], &frame->mc_vregs.spe[i])) { - return 1; - } - } -#endif - /* Set MSR_SPE in the saved MSR value to indicate that - frame->mc_vregs contains valid data. */ - msr |= MSR_SPE; - if (__put_user(env->spe_fscr, &frame->mc_vregs.spe[32])) - return 1; - } - - /* Store MSR. */ - if (__put_user(msr, &frame->mc_gregs[TARGET_PT_MSR])) - return 1; - - /* Set up the sigreturn trampoline: li r0,sigret; sc. */ - if (sigret) { - if (__put_user(0x38000000UL | sigret, &frame->tramp[0]) || - __put_user(0x44000002UL, &frame->tramp[1])) { - return 1; - } - } - - return 0; -} - -static int restore_user_regs(CPUState *env, - struct target_mcontext *frame, int sig) -{ - target_ulong save_r2 = 0; - target_ulong msr; - target_ulong ccr; - - int i; - - if (!sig) { - save_r2 = env->gpr[2]; - } - - /* Restore general registers. */ - for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { - if (__get_user(env->gpr[i], &frame->mc_gregs[i])) { - return 1; - } - } - if (__get_user(env->nip, &frame->mc_gregs[TARGET_PT_NIP]) - || __get_user(env->ctr, &frame->mc_gregs[TARGET_PT_CTR]) - || __get_user(env->lr, &frame->mc_gregs[TARGET_PT_LNK]) - || __get_user(env->xer, &frame->mc_gregs[TARGET_PT_XER])) - return 1; - if (__get_user(ccr, &frame->mc_gregs[TARGET_PT_CCR])) - return 1; - - for (i = 0; i < ARRAY_SIZE(env->crf); i++) { - env->crf[i] = (ccr >> (32 - ((i + 1) * 4))) & 0xf; - } - - if (!sig) { - env->gpr[2] = save_r2; - } - /* Restore MSR. */ - if (__get_user(msr, &frame->mc_gregs[TARGET_PT_MSR])) - return 1; - - /* If doing signal return, restore the previous little-endian mode. */ - if (sig) - env->msr = (env->msr & ~MSR_LE) | (msr & MSR_LE); - - /* Restore Altivec registers if necessary. */ - if (env->insns_flags & PPC_ALTIVEC) { - for (i = 0; i < ARRAY_SIZE(env->avr); i++) { - ppc_avr_t *avr = &env->avr[i]; - ppc_avr_t *vreg = &frame->mc_vregs.altivec[i]; - - if (__get_user(avr->u64[0], &vreg->u64[0]) || - __get_user(avr->u64[1], &vreg->u64[1])) { - return 1; - } - } - /* Set MSR_VEC in the saved MSR value to indicate that - frame->mc_vregs contains valid data. */ - if (__get_user(env->spr[SPR_VRSAVE], - (target_ulong *)(&frame->mc_vregs.altivec[32].u32[3]))) - return 1; - } - - /* Restore floating point registers. */ - if (env->insns_flags & PPC_FLOAT) { - uint64_t fpscr; - for (i = 0; i < ARRAY_SIZE(env->fpr); i++) { - if (__get_user(env->fpr[i], &frame->mc_fregs[i])) { - return 1; - } - } - if (__get_user(fpscr, &frame->mc_fregs[32])) - return 1; - env->fpscr = (uint32_t) fpscr; - } - - /* Save SPE registers. The kernel only saves the high half. */ - if (env->insns_flags & PPC_SPE) { -#if defined(TARGET_PPC64) - for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { - uint32_t hi; - - if (__get_user(hi, &frame->mc_vregs.spe[i])) { - return 1; - } - env->gpr[i] = ((uint64_t)hi << 32) | ((uint32_t) env->gpr[i]); - } -#else - for (i = 0; i < ARRAY_SIZE(env->gprh); i++) { - if (__get_user(env->gprh[i], &frame->mc_vregs.spe[i])) { - return 1; - } - } -#endif - if (__get_user(env->spe_fscr, &frame->mc_vregs.spe[32])) - return 1; - } - - return 0; -} - -static void setup_frame(int sig, struct target_sigaction *ka, - target_sigset_t *set, CPUState *env) -{ - struct target_sigframe *frame; - struct target_sigcontext *sc; - target_ulong frame_addr, newsp; - int err = 0; - int signal; - - frame_addr = get_sigframe(ka, env, sizeof(*frame)); - if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) - goto sigsegv; - sc = &frame->sctx; - - signal = current_exec_domain_sig(sig); - - err |= __put_user(h2g(ka->_sa_handler), &sc->handler); - err |= __put_user(set->sig[0], &sc->oldmask); -#if defined(TARGET_PPC64) - err |= __put_user(set->sig[0] >> 32, &sc->_unused[3]); -#else - err |= __put_user(set->sig[1], &sc->_unused[3]); -#endif - err |= __put_user(h2g(&frame->mctx), &sc->regs); - err |= __put_user(sig, &sc->signal); - - /* Save user regs. */ - err |= save_user_regs(env, &frame->mctx, TARGET_NR_sigreturn); - - /* The kernel checks for the presence of a VDSO here. We don't - emulate a vdso, so use a sigreturn system call. */ - env->lr = (target_ulong) h2g(frame->mctx.tramp); - - /* Turn off all fp exceptions. */ - env->fpscr = 0; - - /* Create a stack frame for the caller of the handler. */ - newsp = frame_addr - SIGNAL_FRAMESIZE; - err |= __put_user(env->gpr[1], (target_ulong *)(uintptr_t) newsp); - - if (err) - goto sigsegv; - - /* Set up registers for signal handler. */ - env->gpr[1] = newsp; - env->gpr[3] = signal; - env->gpr[4] = (target_ulong) h2g(sc); - env->nip = (target_ulong) ka->_sa_handler; - /* Signal handlers are entered in big-endian mode. */ - env->msr &= ~MSR_LE; - - unlock_user_struct(frame, frame_addr, 1); - return; - -sigsegv: - unlock_user_struct(frame, frame_addr, 1); - if (logfile) - fprintf (logfile, "segfaulting from setup_frame\n"); - force_sig(TARGET_SIGSEGV); -} - -static void setup_rt_frame(int sig, struct target_sigaction *ka, - target_siginfo_t *info, - target_sigset_t *set, CPUState *env) -{ - struct target_rt_sigframe *rt_sf; - struct target_mcontext *frame; - target_ulong rt_sf_addr, newsp = 0; - int i, err = 0; - int signal; - - rt_sf_addr = get_sigframe(ka, env, sizeof(*rt_sf)); - if (!lock_user_struct(VERIFY_WRITE, rt_sf, rt_sf_addr, 1)) - goto sigsegv; - - signal = current_exec_domain_sig(sig); - - err |= copy_siginfo_to_user(&rt_sf->info, info); - - err |= __put_user(0, &rt_sf->uc.tuc_flags); - err |= __put_user(0, &rt_sf->uc.tuc_link); - err |= __put_user((target_ulong)target_sigaltstack_used.ss_sp, - &rt_sf->uc.tuc_stack.ss_sp); - err |= __put_user(sas_ss_flags(env->gpr[1]), - &rt_sf->uc.tuc_stack.ss_flags); - err |= __put_user(target_sigaltstack_used.ss_size, - &rt_sf->uc.tuc_stack.ss_size); - err |= __put_user(h2g (&rt_sf->uc.tuc_mcontext), - &rt_sf->uc.tuc_regs); - for(i = 0; i < TARGET_NSIG_WORDS; i++) { - err |= __put_user(set->sig[i], &rt_sf->uc.tuc_sigmask.sig[i]); - } - - frame = &rt_sf->uc.tuc_mcontext; - err |= save_user_regs(env, frame, TARGET_NR_rt_sigreturn); - - /* The kernel checks for the presence of a VDSO here. We don't - emulate a vdso, so use a sigreturn system call. */ - env->lr = (target_ulong) h2g(frame->tramp); - - /* Turn off all fp exceptions. */ - env->fpscr = 0; - - /* Create a stack frame for the caller of the handler. */ - newsp = rt_sf_addr - (SIGNAL_FRAMESIZE + 16); - err |= __put_user(env->gpr[1], (target_ulong *)(uintptr_t) newsp); - - if (err) - goto sigsegv; - - /* Set up registers for signal handler. */ - env->gpr[1] = newsp; - env->gpr[3] = (target_ulong) signal; - env->gpr[4] = (target_ulong) h2g(&rt_sf->info); - env->gpr[5] = (target_ulong) h2g(&rt_sf->uc); - env->gpr[6] = (target_ulong) h2g(rt_sf); - env->nip = (target_ulong) ka->_sa_handler; - /* Signal handlers are entered in big-endian mode. */ - env->msr &= ~MSR_LE; - - unlock_user_struct(rt_sf, rt_sf_addr, 1); - return; - -sigsegv: - unlock_user_struct(rt_sf, rt_sf_addr, 1); - if (logfile) - fprintf (logfile, "segfaulting from setup_rt_frame\n"); - force_sig(TARGET_SIGSEGV); - -} - -long do_sigreturn(CPUState *env) -{ - struct target_sigcontext *sc = NULL; - struct target_mcontext *sr = NULL; - target_ulong sr_addr, sc_addr; - sigset_t blocked; - target_sigset_t set; - - sc_addr = env->gpr[1] + SIGNAL_FRAMESIZE; - if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1)) - goto sigsegv; - -#if defined(TARGET_PPC64) - set.sig[0] = sc->oldmask + ((long)(sc->_unused[3]) << 32); -#else - if(__get_user(set.sig[0], &sc->oldmask) || - __get_user(set.sig[1], &sc->_unused[3])) - goto sigsegv; -#endif - target_to_host_sigset_internal(&blocked, &set); - sigprocmask(SIG_SETMASK, &blocked, NULL); - - if (__get_user(sr_addr, &sc->regs)) - goto sigsegv; - if (!lock_user_struct(VERIFY_READ, sr, sr_addr, 1)) - goto sigsegv; - if (restore_user_regs(env, sr, 1)) - goto sigsegv; - - unlock_user_struct(sr, sr_addr, 1); - unlock_user_struct(sc, sc_addr, 1); - return -TARGET_QEMU_ESIGRETURN; - -sigsegv: - unlock_user_struct(sr, sr_addr, 1); - unlock_user_struct(sc, sc_addr, 1); - if (logfile) - fprintf (logfile, "segfaulting from do_sigreturn\n"); - force_sig(TARGET_SIGSEGV); - return 0; -} - -/* See arch/powerpc/kernel/signal_32.c. */ -static int do_setcontext(struct target_ucontext *ucp, CPUState *env, int sig) -{ - struct target_mcontext *mcp; - target_ulong mcp_addr; - sigset_t blocked; - target_sigset_t set; - - if (copy_from_user(&set, h2g(ucp) + offsetof(struct target_ucontext, tuc_sigmask), - sizeof (set))) - return 1; - -#if defined(TARGET_PPC64) - fprintf (stderr, "do_setcontext: not implemented\n"); - return 0; -#else - if (__get_user(mcp_addr, &ucp->tuc_regs)) - return 1; - - if (!lock_user_struct(VERIFY_READ, mcp, mcp_addr, 1)) - return 1; - - target_to_host_sigset_internal(&blocked, &set); - sigprocmask(SIG_SETMASK, &blocked, NULL); - if (restore_user_regs(env, mcp, sig)) - goto sigsegv; - - unlock_user_struct(mcp, mcp_addr, 1); - return 0; - -sigsegv: - unlock_user_struct(mcp, mcp_addr, 1); - return 1; -#endif -} - -long do_rt_sigreturn(CPUState *env) -{ - struct target_rt_sigframe *rt_sf = NULL; - target_ulong rt_sf_addr; - - rt_sf_addr = env->gpr[1] + SIGNAL_FRAMESIZE + 16; - if (!lock_user_struct(VERIFY_READ, rt_sf, rt_sf_addr, 1)) - goto sigsegv; - - if (do_setcontext(&rt_sf->uc, env, 1)) - goto sigsegv; - - do_sigaltstack(rt_sf_addr - + offsetof(struct target_rt_sigframe, uc.tuc_stack), - 0, env->gpr[1]); - - unlock_user_struct(rt_sf, rt_sf_addr, 1); - return -TARGET_QEMU_ESIGRETURN; - -sigsegv: - unlock_user_struct(rt_sf, rt_sf_addr, 1); - if (logfile) - fprintf (logfile, "segfaulting from do_rt_sigreturn\n"); - force_sig(TARGET_SIGSEGV); - return 0; -} - -#elif defined(TARGET_M68K) - -struct target_sigcontext { - abi_ulong sc_mask; - abi_ulong sc_usp; - abi_ulong sc_d0; - abi_ulong sc_d1; - abi_ulong sc_a0; - abi_ulong sc_a1; - unsigned short sc_sr; - abi_ulong sc_pc; -}; - -struct target_sigframe -{ - abi_ulong pretcode; - int sig; - int code; - abi_ulong psc; - char retcode[8]; - abi_ulong extramask[TARGET_NSIG_WORDS-1]; - struct target_sigcontext sc; -}; - -typedef int target_greg_t; -#define TARGET_NGREG 18 -typedef target_greg_t target_gregset_t[TARGET_NGREG]; - -typedef struct target_fpregset { - int f_fpcntl[3]; - int f_fpregs[8*3]; -} target_fpregset_t; - -struct target_mcontext { - int version; - target_gregset_t gregs; - target_fpregset_t fpregs; -}; - -#define TARGET_MCONTEXT_VERSION 2 - -struct target_ucontext { - abi_ulong tuc_flags; - abi_ulong tuc_link; - target_stack_t tuc_stack; - struct target_mcontext tuc_mcontext; - abi_long tuc_filler[80]; - target_sigset_t tuc_sigmask; -}; - -struct target_rt_sigframe -{ - abi_ulong pretcode; - int sig; - abi_ulong pinfo; - abi_ulong puc; - char retcode[8]; - struct target_siginfo info; - struct target_ucontext uc; -}; - -static int -setup_sigcontext(struct target_sigcontext *sc, CPUState *env, abi_ulong mask) -{ - int err = 0; - - err |= __put_user(mask, &sc->sc_mask); - err |= __put_user(env->aregs[7], &sc->sc_usp); - err |= __put_user(env->dregs[0], &sc->sc_d0); - err |= __put_user(env->dregs[1], &sc->sc_d1); - err |= __put_user(env->aregs[0], &sc->sc_a0); - err |= __put_user(env->aregs[1], &sc->sc_a1); - err |= __put_user(env->sr, &sc->sc_sr); - err |= __put_user(env->pc, &sc->sc_pc); - - return err; -} - -static int -restore_sigcontext(CPUState *env, struct target_sigcontext *sc, int *pd0) -{ - int err = 0; - int temp; - - err |= __get_user(env->aregs[7], &sc->sc_usp); - err |= __get_user(env->dregs[1], &sc->sc_d1); - err |= __get_user(env->aregs[0], &sc->sc_a0); - err |= __get_user(env->aregs[1], &sc->sc_a1); - err |= __get_user(env->pc, &sc->sc_pc); - err |= __get_user(temp, &sc->sc_sr); - env->sr = (env->sr & 0xff00) | (temp & 0xff); - - *pd0 = tswapl(sc->sc_d0); - - return err; -} - -/* - * Determine which stack to use.. - */ -static inline abi_ulong -get_sigframe(struct target_sigaction *ka, CPUState *regs, size_t frame_size) -{ - unsigned long sp; - - sp = regs->aregs[7]; - - /* This is the X/Open sanctioned signal stack switching. */ - if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) { - sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; - } - - return ((sp - frame_size) & -8UL); -} - -static void setup_frame(int sig, struct target_sigaction *ka, - target_sigset_t *set, CPUState *env) -{ - struct target_sigframe *frame; - abi_ulong frame_addr; - abi_ulong retcode_addr; - abi_ulong sc_addr; - int err = 0; - int i; - - frame_addr = get_sigframe(ka, env, sizeof *frame); - if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) - goto give_sigsegv; - - err |= __put_user(sig, &frame->sig); - - sc_addr = frame_addr + offsetof(struct target_sigframe, sc); - err |= __put_user(sc_addr, &frame->psc); - - err |= setup_sigcontext(&frame->sc, env, set->sig[0]); - if (err) - goto give_sigsegv; - - for(i = 1; i < TARGET_NSIG_WORDS; i++) { - if (__put_user(set->sig[i], &frame->extramask[i - 1])) - goto give_sigsegv; - } - - /* Set up to return from userspace. */ - - retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode); - err |= __put_user(retcode_addr, &frame->pretcode); - - /* moveq #,d0; trap #0 */ - - err |= __put_user(0x70004e40 + (TARGET_NR_sigreturn << 16), - (long *)(frame->retcode)); - - if (err) - goto give_sigsegv; - - /* Set up to return from userspace */ - - env->aregs[7] = frame_addr; - env->pc = ka->_sa_handler; - - unlock_user_struct(frame, frame_addr, 1); - return; - -give_sigsegv: - unlock_user_struct(frame, frame_addr, 1); - force_sig(TARGET_SIGSEGV); -} - -static inline int target_rt_setup_ucontext(struct target_ucontext *uc, - CPUState *env) -{ - target_greg_t *gregs = uc->tuc_mcontext.gregs; - int err; - - err = __put_user(TARGET_MCONTEXT_VERSION, &uc->tuc_mcontext.version); - err |= __put_user(env->dregs[0], &gregs[0]); - err |= __put_user(env->dregs[1], &gregs[1]); - err |= __put_user(env->dregs[2], &gregs[2]); - err |= __put_user(env->dregs[3], &gregs[3]); - err |= __put_user(env->dregs[4], &gregs[4]); - err |= __put_user(env->dregs[5], &gregs[5]); - err |= __put_user(env->dregs[6], &gregs[6]); - err |= __put_user(env->dregs[7], &gregs[7]); - err |= __put_user(env->aregs[0], &gregs[8]); - err |= __put_user(env->aregs[1], &gregs[9]); - err |= __put_user(env->aregs[2], &gregs[10]); - err |= __put_user(env->aregs[3], &gregs[11]); - err |= __put_user(env->aregs[4], &gregs[12]); - err |= __put_user(env->aregs[5], &gregs[13]); - err |= __put_user(env->aregs[6], &gregs[14]); - err |= __put_user(env->aregs[7], &gregs[15]); - err |= __put_user(env->pc, &gregs[16]); - err |= __put_user(env->sr, &gregs[17]); - - return err; -} - -static inline int target_rt_restore_ucontext(CPUState *env, - struct target_ucontext *uc, - int *pd0) -{ - int temp; - int err; - target_greg_t *gregs = uc->tuc_mcontext.gregs; - - err = __get_user(temp, &uc->tuc_mcontext.version); - if (temp != TARGET_MCONTEXT_VERSION) - goto badframe; - - /* restore passed registers */ - err |= __get_user(env->dregs[0], &gregs[0]); - err |= __get_user(env->dregs[1], &gregs[1]); - err |= __get_user(env->dregs[2], &gregs[2]); - err |= __get_user(env->dregs[3], &gregs[3]); - err |= __get_user(env->dregs[4], &gregs[4]); - err |= __get_user(env->dregs[5], &gregs[5]); - err |= __get_user(env->dregs[6], &gregs[6]); - err |= __get_user(env->dregs[7], &gregs[7]); - err |= __get_user(env->aregs[0], &gregs[8]); - err |= __get_user(env->aregs[1], &gregs[9]); - err |= __get_user(env->aregs[2], &gregs[10]); - err |= __get_user(env->aregs[3], &gregs[11]); - err |= __get_user(env->aregs[4], &gregs[12]); - err |= __get_user(env->aregs[5], &gregs[13]); - err |= __get_user(env->aregs[6], &gregs[14]); - err |= __get_user(env->aregs[7], &gregs[15]); - err |= __get_user(env->pc, &gregs[16]); - err |= __get_user(temp, &gregs[17]); - env->sr = (env->sr & 0xff00) | (temp & 0xff); - - *pd0 = env->dregs[0]; - return err; - -badframe: - return 1; -} - -static void setup_rt_frame(int sig, struct target_sigaction *ka, - target_siginfo_t *info, - target_sigset_t *set, CPUState *env) -{ - struct target_rt_sigframe *frame; - abi_ulong frame_addr; - abi_ulong retcode_addr; - abi_ulong info_addr; - abi_ulong uc_addr; - int err = 0; - int i; - - frame_addr = get_sigframe(ka, env, sizeof *frame); - if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) - goto give_sigsegv; - - err |= __put_user(sig, &frame->sig); - - info_addr = frame_addr + offsetof(struct target_rt_sigframe, info); - err |= __put_user(info_addr, &frame->pinfo); - - uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc); - err |= __put_user(uc_addr, &frame->puc); - - err |= copy_siginfo_to_user(&frame->info, info); - - /* Create the ucontext */ - - err |= __put_user(0, &frame->uc.tuc_flags); - err |= __put_user(0, &frame->uc.tuc_link); - err |= __put_user(target_sigaltstack_used.ss_sp, - &frame->uc.tuc_stack.ss_sp); - err |= __put_user(sas_ss_flags(env->aregs[7]), - &frame->uc.tuc_stack.ss_flags); - err |= __put_user(target_sigaltstack_used.ss_size, - &frame->uc.tuc_stack.ss_size); - err |= target_rt_setup_ucontext(&frame->uc, env); - - if (err) - goto give_sigsegv; - - for(i = 0; i < TARGET_NSIG_WORDS; i++) { - if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i])) - goto give_sigsegv; - } - - /* Set up to return from userspace. */ - - retcode_addr = frame_addr + offsetof(struct target_sigframe, retcode); - err |= __put_user(retcode_addr, &frame->pretcode); - - /* moveq #,d0; notb d0; trap #0 */ - - err |= __put_user(0x70004600 + ((TARGET_NR_rt_sigreturn ^ 0xff) << 16), - (long *)(frame->retcode + 0)); - err |= __put_user(0x4e40, (short *)(frame->retcode + 4)); - - if (err) - goto give_sigsegv; - - /* Set up to return from userspace */ - - env->aregs[7] = frame_addr; - env->pc = ka->_sa_handler; - - unlock_user_struct(frame, frame_addr, 1); - return; - -give_sigsegv: - unlock_user_struct(frame, frame_addr, 1); - force_sig(TARGET_SIGSEGV); -} - -long do_sigreturn(CPUState *env) -{ - struct target_sigframe *frame; - abi_ulong frame_addr = env->aregs[7] - 4; - target_sigset_t target_set; - sigset_t set; - int d0, i; - - if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) - goto badframe; - - /* set blocked signals */ - - if (__get_user(target_set.sig[0], &frame->sc.sc_mask)) - goto badframe; - - for(i = 1; i < TARGET_NSIG_WORDS; i++) { - if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) - goto badframe; - } - - target_to_host_sigset_internal(&set, &target_set); - sigprocmask(SIG_SETMASK, &set, NULL); - - /* restore registers */ - - if (restore_sigcontext(env, &frame->sc, &d0)) - goto badframe; - - unlock_user_struct(frame, frame_addr, 0); - return d0; - -badframe: - unlock_user_struct(frame, frame_addr, 0); - force_sig(TARGET_SIGSEGV); - return 0; -} - -long do_rt_sigreturn(CPUState *env) -{ - struct target_rt_sigframe *frame; - abi_ulong frame_addr = env->aregs[7] - 4; - target_sigset_t target_set; - sigset_t set; - int d0; - - if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) - goto badframe; - - target_to_host_sigset_internal(&set, &target_set); - sigprocmask(SIG_SETMASK, &set, NULL); - - /* restore registers */ - - if (target_rt_restore_ucontext(env, &frame->uc, &d0)) - goto badframe; - - if (do_sigaltstack(frame_addr + - offsetof(struct target_rt_sigframe, uc.tuc_stack), - 0, get_sp_from_cpustate(env)) == -EFAULT) - goto badframe; - - unlock_user_struct(frame, frame_addr, 0); - return d0; - -badframe: - unlock_user_struct(frame, frame_addr, 0); - force_sig(TARGET_SIGSEGV); - return 0; -} - -#elif defined(TARGET_ALPHA) - -struct target_sigcontext { - abi_long sc_onstack; - abi_long sc_mask; - abi_long sc_pc; - abi_long sc_ps; - abi_long sc_regs[32]; - abi_long sc_ownedfp; - abi_long sc_fpregs[32]; - abi_ulong sc_fpcr; - abi_ulong sc_fp_control; - abi_ulong sc_reserved1; - abi_ulong sc_reserved2; - abi_ulong sc_ssize; - abi_ulong sc_sbase; - abi_ulong sc_traparg_a0; - abi_ulong sc_traparg_a1; - abi_ulong sc_traparg_a2; - abi_ulong sc_fp_trap_pc; - abi_ulong sc_fp_trigger_sum; - abi_ulong sc_fp_trigger_inst; -}; - -struct target_ucontext { - abi_ulong tuc_flags; - abi_ulong tuc_link; - abi_ulong tuc_osf_sigmask; - target_stack_t tuc_stack; - struct target_sigcontext tuc_mcontext; - target_sigset_t tuc_sigmask; -}; - -struct target_sigframe { - struct target_sigcontext sc; - unsigned int retcode[3]; -}; - -struct target_rt_sigframe { - target_siginfo_t info; - struct target_ucontext uc; - unsigned int retcode[3]; -}; - -#define INSN_MOV_R30_R16 0x47fe0410 -#define INSN_LDI_R0 0x201f0000 -#define INSN_CALLSYS 0x00000083 - -static int setup_sigcontext(struct target_sigcontext *sc, CPUState *env, - abi_ulong frame_addr, target_sigset_t *set) -{ - int i, err = 0; - - err |= __put_user(on_sig_stack(frame_addr), &sc->sc_onstack); - err |= __put_user(set->sig[0], &sc->sc_mask); - err |= __put_user(env->pc, &sc->sc_pc); - err |= __put_user(8, &sc->sc_ps); - - for (i = 0; i < 31; ++i) { - err |= __put_user(env->ir[i], &sc->sc_regs[i]); - } - err |= __put_user(0, &sc->sc_regs[31]); - - for (i = 0; i < 31; ++i) { - err |= __put_user(env->fir[i], &sc->sc_fpregs[i]); - } - err |= __put_user(0, &sc->sc_fpregs[31]); - err |= __put_user(cpu_alpha_load_fpcr(env), &sc->sc_fpcr); - - err |= __put_user(0, &sc->sc_traparg_a0); /* FIXME */ - err |= __put_user(0, &sc->sc_traparg_a1); /* FIXME */ - err |= __put_user(0, &sc->sc_traparg_a2); /* FIXME */ - - return err; -} - -static int restore_sigcontext(CPUState *env, struct target_sigcontext *sc) -{ - uint64_t fpcr; - int i, err = 0; - - err |= __get_user(env->pc, &sc->sc_pc); - - for (i = 0; i < 31; ++i) { - err |= __get_user(env->ir[i], &sc->sc_regs[i]); - } - for (i = 0; i < 31; ++i) { - err |= __get_user(env->fir[i], &sc->sc_fpregs[i]); - } - - err |= __get_user(fpcr, &sc->sc_fpcr); - cpu_alpha_store_fpcr(env, fpcr); - - return err; -} - -static inline abi_ulong get_sigframe(struct target_sigaction *sa, - CPUState *env, unsigned long framesize) -{ - abi_ulong sp = env->ir[IR_SP]; - - /* This is the X/Open sanctioned signal stack switching. */ - if ((sa->sa_flags & TARGET_SA_ONSTACK) != 0 && !sas_ss_flags(sp)) { - sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; - } - return (sp - framesize) & -32; -} - -static void setup_frame(int sig, struct target_sigaction *ka, - target_sigset_t *set, CPUState *env) -{ - abi_ulong frame_addr, r26; - struct target_sigframe *frame; - int err = 0; - - frame_addr = get_sigframe(ka, env, sizeof(*frame)); - if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) { - goto give_sigsegv; - } - - err |= setup_sigcontext(&frame->sc, env, frame_addr, set); - - if (ka->sa_restorer) { - r26 = ka->sa_restorer; - } else { - err |= __put_user(INSN_MOV_R30_R16, &frame->retcode[0]); - err |= __put_user(INSN_LDI_R0 + TARGET_NR_sigreturn, - &frame->retcode[1]); - err |= __put_user(INSN_CALLSYS, &frame->retcode[2]); - /* imb() */ - r26 = frame_addr; - } - - unlock_user_struct(frame, frame_addr, 1); - - if (err) { - give_sigsegv: - if (sig == TARGET_SIGSEGV) { - ka->_sa_handler = TARGET_SIG_DFL; - } - force_sig(TARGET_SIGSEGV); - } - - env->ir[IR_RA] = r26; - env->ir[IR_PV] = env->pc = ka->_sa_handler; - env->ir[IR_A0] = sig; - env->ir[IR_A1] = 0; - env->ir[IR_A2] = frame_addr + offsetof(struct target_sigframe, sc); - env->ir[IR_SP] = frame_addr; -} - -static void setup_rt_frame(int sig, struct target_sigaction *ka, - target_siginfo_t *info, - target_sigset_t *set, CPUState *env) -{ - abi_ulong frame_addr, r26; - struct target_rt_sigframe *frame; - int i, err = 0; - - frame_addr = get_sigframe(ka, env, sizeof(*frame)); - if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) { - goto give_sigsegv; - } - - err |= copy_siginfo_to_user(&frame->info, info); - - err |= __put_user(0, &frame->uc.tuc_flags); - err |= __put_user(0, &frame->uc.tuc_link); - err |= __put_user(set->sig[0], &frame->uc.tuc_osf_sigmask); - err |= __put_user(target_sigaltstack_used.ss_sp, - &frame->uc.tuc_stack.ss_sp); - err |= __put_user(sas_ss_flags(env->ir[IR_SP]), - &frame->uc.tuc_stack.ss_flags); - err |= __put_user(target_sigaltstack_used.ss_size, - &frame->uc.tuc_stack.ss_size); - err |= setup_sigcontext(&frame->uc.tuc_mcontext, env, frame_addr, set); - for (i = 0; i < TARGET_NSIG_WORDS; ++i) { - err |= __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]); - } - - if (ka->sa_restorer) { - r26 = ka->sa_restorer; - } else { - err |= __put_user(INSN_MOV_R30_R16, &frame->retcode[0]); - err |= __put_user(INSN_LDI_R0 + TARGET_NR_rt_sigreturn, - &frame->retcode[1]); - err |= __put_user(INSN_CALLSYS, &frame->retcode[2]); - /* imb(); */ - r26 = frame_addr; - } - - if (err) { - give_sigsegv: - if (sig == TARGET_SIGSEGV) { - ka->_sa_handler = TARGET_SIG_DFL; - } - force_sig(TARGET_SIGSEGV); - } - - env->ir[IR_RA] = r26; - env->ir[IR_PV] = env->pc = ka->_sa_handler; - env->ir[IR_A0] = sig; - env->ir[IR_A1] = frame_addr + offsetof(struct target_rt_sigframe, info); - env->ir[IR_A2] = frame_addr + offsetof(struct target_rt_sigframe, uc); - env->ir[IR_SP] = frame_addr; -} - -long do_sigreturn(CPUState *env) -{ - struct target_sigcontext *sc; - abi_ulong sc_addr = env->ir[IR_A0]; - target_sigset_t target_set; - sigset_t set; - - if (!lock_user_struct(VERIFY_READ, sc, sc_addr, 1)) { - goto badframe; - } - - target_sigemptyset(&target_set); - if (__get_user(target_set.sig[0], &sc->sc_mask)) { - goto badframe; - } - - target_to_host_sigset_internal(&set, &target_set); - sigprocmask(SIG_SETMASK, &set, NULL); - - if (restore_sigcontext(env, sc)) { - goto badframe; - } - unlock_user_struct(sc, sc_addr, 0); - return env->ir[IR_V0]; - - badframe: - unlock_user_struct(sc, sc_addr, 0); - force_sig(TARGET_SIGSEGV); -} - -long do_rt_sigreturn(CPUState *env) -{ - abi_ulong frame_addr = env->ir[IR_A0]; - struct target_rt_sigframe *frame; - sigset_t set; - - if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) { - goto badframe; - } - target_to_host_sigset(&set, &frame->uc.tuc_sigmask); - sigprocmask(SIG_SETMASK, &set, NULL); - - if (restore_sigcontext(env, &frame->uc.tuc_mcontext)) { - goto badframe; - } - if (do_sigaltstack(frame_addr + offsetof(struct target_rt_sigframe, - uc.tuc_stack), - 0, env->ir[IR_SP]) == -EFAULT) { - goto badframe; - } - - unlock_user_struct(frame, frame_addr, 0); - return env->ir[IR_V0]; - - - badframe: - unlock_user_struct(frame, frame_addr, 0); - force_sig(TARGET_SIGSEGV); -} - -#else - -static void setup_frame(int sig, struct target_sigaction *ka, - target_sigset_t *set, CPUState *env) -{ - fprintf(stderr, "setup_frame: not implemented\n"); -} - -static void setup_rt_frame(int sig, struct target_sigaction *ka, - target_siginfo_t *info, - target_sigset_t *set, CPUState *env) -{ - fprintf(stderr, "setup_rt_frame: not implemented\n"); -} - -long do_sigreturn(CPUState *env) -{ - fprintf(stderr, "do_sigreturn: not implemented\n"); - return -TARGET_ENOSYS; -} - -long do_rt_sigreturn(CPUState *env) -{ - fprintf(stderr, "do_rt_sigreturn: not implemented\n"); - return -TARGET_ENOSYS; -} - -#endif void process_pending_signals(CPUState *cpu_env) { |