diff -r ffa851df0825 -r 2fb8b9db1c86 symbian-qemu-0.9.1-12/qemu-symbian-svp/linux-user/signal.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/symbian-qemu-0.9.1-12/qemu-symbian-svp/linux-user/signal.c Fri Jul 31 15:01:17 2009 +0100 @@ -0,0 +1,3192 @@ +/* + * Emulation of Linux signals + * + * Copyright (c) 2003 Fabrice Bellard + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ +#include +#include +#include +#include +#include +#include +#include +#include + +#include "qemu.h" +#include "target_signal.h" + +//#define DEBUG_SIGNAL + +static struct target_sigaltstack target_sigaltstack_used = { + .ss_sp = 0, + .ss_size = 0, + .ss_flags = TARGET_SS_DISABLE, +}; + +static struct target_sigaction sigact_table[TARGET_NSIG]; + +static void host_signal_handler(int host_signum, siginfo_t *info, + void *puc); + +static uint8_t host_to_target_signal_table[65] = { + [SIGHUP] = TARGET_SIGHUP, + [SIGINT] = TARGET_SIGINT, + [SIGQUIT] = TARGET_SIGQUIT, + [SIGILL] = TARGET_SIGILL, + [SIGTRAP] = TARGET_SIGTRAP, + [SIGABRT] = TARGET_SIGABRT, +/* [SIGIOT] = TARGET_SIGIOT,*/ + [SIGBUS] = TARGET_SIGBUS, + [SIGFPE] = TARGET_SIGFPE, + [SIGKILL] = TARGET_SIGKILL, + [SIGUSR1] = TARGET_SIGUSR1, + [SIGSEGV] = TARGET_SIGSEGV, + [SIGUSR2] = TARGET_SIGUSR2, + [SIGPIPE] = TARGET_SIGPIPE, + [SIGALRM] = TARGET_SIGALRM, + [SIGTERM] = TARGET_SIGTERM, +#ifdef SIGSTKFLT + [SIGSTKFLT] = TARGET_SIGSTKFLT, +#endif + [SIGCHLD] = TARGET_SIGCHLD, + [SIGCONT] = TARGET_SIGCONT, + [SIGSTOP] = TARGET_SIGSTOP, + [SIGTSTP] = TARGET_SIGTSTP, + [SIGTTIN] = TARGET_SIGTTIN, + [SIGTTOU] = TARGET_SIGTTOU, + [SIGURG] = TARGET_SIGURG, + [SIGXCPU] = TARGET_SIGXCPU, + [SIGXFSZ] = TARGET_SIGXFSZ, + [SIGVTALRM] = TARGET_SIGVTALRM, + [SIGPROF] = TARGET_SIGPROF, + [SIGWINCH] = TARGET_SIGWINCH, + [SIGIO] = TARGET_SIGIO, + [SIGPWR] = TARGET_SIGPWR, + [SIGSYS] = TARGET_SIGSYS, + /* next signals stay the same */ + /* Nasty hack: Reverse SIGRTMIN and SIGRTMAX to avoid overlap with + host libpthread signals. This assumes noone actually uses SIGRTMAX :-/ + To fix this properly we need to do manual signal delivery multiplexed + over a single host signal. */ + [__SIGRTMIN] = __SIGRTMAX, + [__SIGRTMAX] = __SIGRTMIN, +}; +static uint8_t target_to_host_signal_table[65]; + +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); +} + +static inline int host_to_target_signal(int sig) +{ + if (sig > 64) + return sig; + return host_to_target_signal_table[sig]; +} + +int target_to_host_signal(int sig) +{ + if (sig > 64) + return 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--; + abi_ulong mask = (abi_ulong)1 << (signum % TARGET_NSIG_BPW); + set->sig[signum / TARGET_NSIG_BPW] |= mask; +} + +static inline int target_sigismember(const target_sigset_t *set, int signum) +{ + signum--; + abi_ulong mask = (abi_ulong)1 << (signum % TARGET_NSIG_BPW); + return ((set->sig[signum / TARGET_NSIG_BPW] & mask) != 0); +} + +static void host_to_target_sigset_internal(target_sigset_t *d, + const sigset_t *s) +{ + int i; + target_sigemptyset(d); + for (i = 1; i <= TARGET_NSIG; i++) { + if (sigismember(s, i)) { + target_sigaddset(d, host_to_target_signal(i)); + } + } +} + +void host_to_target_sigset(target_sigset_t *d, const sigset_t *s) +{ + target_sigset_t d1; + int i; + + host_to_target_sigset_internal(&d1, s); + for(i = 0;i < TARGET_NSIG_WORDS; i++) + d->sig[i] = tswapl(d1.sig[i]); +} + +static void target_to_host_sigset_internal(sigset_t *d, + const target_sigset_t *s) +{ + int i; + sigemptyset(d); + for (i = 1; i <= TARGET_NSIG; i++) { + if (target_sigismember(s, i)) { + sigaddset(d, target_to_host_signal(i)); + } + } +} + +void target_to_host_sigset(sigset_t *d, const target_sigset_t *s) +{ + target_sigset_t s1; + int i; + + for(i = 0;i < TARGET_NSIG_WORDS; i++) + s1.sig[i] = tswapl(s->sig[i]); + target_to_host_sigset_internal(d, &s1); +} + +void host_to_target_old_sigset(abi_ulong *old_sigset, + const sigset_t *sigset) +{ + target_sigset_t d; + host_to_target_sigset(&d, sigset); + *old_sigset = d.sig[0]; +} + +void target_to_host_old_sigset(sigset_t *sigset, + const abi_ulong *old_sigset) +{ + target_sigset_t d; + int i; + + d.sig[0] = *old_sigset; + for(i = 1;i < TARGET_NSIG_WORDS; i++) + d.sig[i] = 0; + target_to_host_sigset(sigset, &d); +} + +/* siginfo conversion */ + +static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo, + const siginfo_t *info) +{ + int sig; + sig = host_to_target_signal(info->si_signo); + tinfo->si_signo = sig; + tinfo->si_errno = 0; + tinfo->si_code = info->si_code; + if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV || + sig == SIGBUS || sig == SIGTRAP) { + /* should never come here, but who knows. The information for + the target is irrelevant */ + tinfo->_sifields._sigfault._addr = 0; + } else if (sig == SIGIO) { + tinfo->_sifields._sigpoll._fd = info->si_fd; + } else if (sig >= TARGET_SIGRTMIN) { + tinfo->_sifields._rt._pid = info->si_pid; + tinfo->_sifields._rt._uid = info->si_uid; + /* XXX: potential problem if 64 bit */ + tinfo->_sifields._rt._sigval.sival_ptr = + (abi_ulong)(unsigned long)info->si_value.sival_ptr; + } +} + +static void tswap_siginfo(target_siginfo_t *tinfo, + const target_siginfo_t *info) +{ + int sig; + sig = info->si_signo; + tinfo->si_signo = tswap32(sig); + tinfo->si_errno = tswap32(info->si_errno); + tinfo->si_code = tswap32(info->si_code); + if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV || + sig == SIGBUS || sig == SIGTRAP) { + tinfo->_sifields._sigfault._addr = + tswapl(info->_sifields._sigfault._addr); + } else if (sig == SIGIO) { + tinfo->_sifields._sigpoll._fd = tswap32(info->_sifields._sigpoll._fd); + } else if (sig >= TARGET_SIGRTMIN) { + tinfo->_sifields._rt._pid = tswap32(info->_sifields._rt._pid); + tinfo->_sifields._rt._uid = tswap32(info->_sifields._rt._uid); + tinfo->_sifields._rt._sigval.sival_ptr = + tswapl(info->_sifields._rt._sigval.sival_ptr); + } +} + + +void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info) +{ + host_to_target_siginfo_noswap(tinfo, info); + tswap_siginfo(tinfo, tinfo); +} + +/* XXX: we support only POSIX RT signals are used. */ +/* XXX: find a solution for 64 bit (additional malloced data is needed) */ +void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo) +{ + info->si_signo = tswap32(tinfo->si_signo); + info->si_errno = tswap32(tinfo->si_errno); + info->si_code = tswap32(tinfo->si_code); + info->si_pid = tswap32(tinfo->_sifields._rt._pid); + info->si_uid = tswap32(tinfo->_sifields._rt._uid); + info->si_value.sival_ptr = + (void *)(long)tswapl(tinfo->_sifields._rt._sigval.sival_ptr); +} + +static int fatal_signal (int sig) +{ + switch (sig) { + case TARGET_SIGCHLD: + case TARGET_SIGURG: + case TARGET_SIGWINCH: + /* Ignored by default. */ + return 0; + case TARGET_SIGCONT: + case TARGET_SIGSTOP: + case TARGET_SIGTSTP: + case TARGET_SIGTTIN: + case TARGET_SIGTTOU: + /* Job control signals. */ + return 0; + default: + return 1; + } +} + +void signal_init(void) +{ + struct sigaction act; + struct sigaction oact; + int i, j; + int host_sig; + + /* generate signal conversion tables */ + for(i = 1; i <= 64; i++) { + if (host_to_target_signal_table[i] == 0) + host_to_target_signal_table[i] = i; + } + for(i = 1; i <= 64; i++) { + j = host_to_target_signal_table[i]; + target_to_host_signal_table[j] = i; + } + + /* set all host signal handlers. ALL signals are blocked during + the handlers to serialize them. */ + memset(sigact_table, 0, sizeof(sigact_table)); + + sigfillset(&act.sa_mask); + act.sa_flags = SA_SIGINFO; + act.sa_sigaction = host_signal_handler; + for(i = 1; i <= TARGET_NSIG; i++) { + host_sig = target_to_host_signal(i); + sigaction(host_sig, NULL, &oact); + if (oact.sa_sigaction == (void *)SIG_IGN) { + sigact_table[i - 1]._sa_handler = TARGET_SIG_IGN; + } else if (oact.sa_sigaction == (void *)SIG_DFL) { + sigact_table[i - 1]._sa_handler = TARGET_SIG_DFL; + } + /* If there's already a handler installed then something has + gone horribly wrong, so don't even try to handle that case. */ + /* Install some handlers for our own use. We need at least + SIGSEGV and SIGBUS, to detect exceptions. We can not just + trap all signals because it affects syscall interrupt + behavior. But do trap all default-fatal signals. */ + if (fatal_signal (i)) + sigaction(host_sig, &act, NULL); + } +} + +/* signal queue handling */ + +static inline struct sigqueue *alloc_sigqueue(CPUState *env) +{ + TaskState *ts = env->opaque; + struct sigqueue *q = ts->first_free; + if (!q) + return NULL; + ts->first_free = q->next; + return q; +} + +static inline void free_sigqueue(CPUState *env, struct sigqueue *q) +{ + TaskState *ts = env->opaque; + q->next = ts->first_free; + ts->first_free = q; +} + +/* abort execution with signal */ +static void __attribute((noreturn)) force_sig(int sig) +{ + int host_sig; + host_sig = target_to_host_signal(sig); + fprintf(stderr, "qemu: uncaught target signal %d (%s) - exiting\n", + sig, strsignal(host_sig)); +#if 1 + gdb_signalled(thread_env, sig); + _exit(-host_sig); +#else + { + struct sigaction act; + sigemptyset(&act.sa_mask); + act.sa_flags = SA_SIGINFO; + act.sa_sigaction = SIG_DFL; + sigaction(SIGABRT, &act, NULL); + abort(); + } +#endif +} + +/* queue a signal so that it will be send to the virtual CPU as soon + as possible */ +int queue_signal(CPUState *env, int sig, target_siginfo_t *info) +{ + TaskState *ts = env->opaque; + struct emulated_sigtable *k; + struct sigqueue *q, **pq; + abi_ulong handler; + int queue; + +#if defined(DEBUG_SIGNAL) + fprintf(stderr, "queue_signal: sig=%d\n", + sig); +#endif + k = &ts->sigtab[sig - 1]; + queue = gdb_queuesig (); + handler = sigact_table[sig - 1]._sa_handler; + if (!queue && handler == TARGET_SIG_DFL) { + if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) { + kill(getpid(),SIGSTOP); + return 0; + } else + /* default handler : ignore some signal. The other are fatal */ + if (sig != TARGET_SIGCHLD && + sig != TARGET_SIGURG && + sig != TARGET_SIGWINCH && + sig != TARGET_SIGCONT) { + force_sig(sig); + } else { + return 0; /* indicate ignored */ + } + } else if (!queue && handler == TARGET_SIG_IGN) { + /* ignore signal */ + return 0; + } else if (!queue && handler == TARGET_SIG_ERR) { + force_sig(sig); + } else { + pq = &k->first; + if (sig < TARGET_SIGRTMIN) { + /* if non real time signal, we queue exactly one signal */ + if (!k->pending) + q = &k->info; + else + return 0; + } else { + if (!k->pending) { + /* first signal */ + q = &k->info; + } else { + q = alloc_sigqueue(env); + if (!q) + return -EAGAIN; + while (*pq != NULL) + pq = &(*pq)->next; + } + } + *pq = q; + q->info = *info; + q->next = NULL; + k->pending = 1; + /* signal that a new signal is pending */ + ts->signal_pending = 1; + return 1; /* indicates that the signal was queued */ + } +} + +static void host_signal_handler(int host_signum, siginfo_t *info, + void *puc) +{ + int sig; + target_siginfo_t tinfo; + + /* the CPU emulator uses some host signals to detect exceptions, + we we forward to it some signals */ + if ((host_signum == SIGSEGV || host_signum == SIGBUS) + && info->si_code == SI_KERNEL) { + if (cpu_signal_handler(host_signum, info, puc)) + return; + } + + /* get target signal number */ + sig = host_to_target_signal(host_signum); + if (sig < 1 || sig > TARGET_NSIG) + return; +#if defined(DEBUG_SIGNAL) + fprintf(stderr, "qemu: got signal %d\n", sig); +#endif + host_to_target_siginfo_noswap(&tinfo, info); + if (queue_signal(thread_env, sig, &tinfo) == 1) { + /* interrupt the virtual CPU as soon as possible */ + cpu_interrupt(thread_env, CPU_INTERRUPT_EXIT); + } +} + +/* do_sigaltstack() returns target values and errnos. */ +/* compare linux/kernel/signal.c:do_sigaltstack() */ +abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp) +{ + int ret; + struct target_sigaltstack oss; + + /* XXX: test errors */ + if(uoss_addr) + { + __put_user(target_sigaltstack_used.ss_sp, &oss.ss_sp); + __put_user(target_sigaltstack_used.ss_size, &oss.ss_size); + __put_user(sas_ss_flags(sp), &oss.ss_flags); + } + + if(uss_addr) + { + struct target_sigaltstack *uss; + struct target_sigaltstack ss; + + ret = -TARGET_EFAULT; + if (!lock_user_struct(VERIFY_READ, uss, uss_addr, 1) + || __get_user(ss.ss_sp, &uss->ss_sp) + || __get_user(ss.ss_size, &uss->ss_size) + || __get_user(ss.ss_flags, &uss->ss_flags)) + goto out; + unlock_user_struct(uss, uss_addr, 0); + + ret = -TARGET_EPERM; + if (on_sig_stack(sp)) + goto out; + + ret = -TARGET_EINVAL; + if (ss.ss_flags != TARGET_SS_DISABLE + && ss.ss_flags != TARGET_SS_ONSTACK + && ss.ss_flags != 0) + goto out; + + if (ss.ss_flags == TARGET_SS_DISABLE) { + ss.ss_size = 0; + ss.ss_sp = 0; + } else { + ret = -TARGET_ENOMEM; + if (ss.ss_size < MINSIGSTKSZ) + goto out; + } + + target_sigaltstack_used.ss_sp = ss.ss_sp; + target_sigaltstack_used.ss_size = ss.ss_size; + } + + if (uoss_addr) { + ret = -TARGET_EFAULT; + if (copy_to_user(uoss_addr, &oss, sizeof(oss))) + goto out; + } + + ret = 0; +out: + return ret; +} + +/* do_sigaction() return host values and errnos */ +int do_sigaction(int sig, const struct target_sigaction *act, + struct target_sigaction *oact) +{ + struct target_sigaction *k; + struct sigaction act1; + int host_sig; + int ret = 0; + + if (sig < 1 || sig > TARGET_NSIG || sig == TARGET_SIGKILL || sig == TARGET_SIGSTOP) + return -EINVAL; + k = &sigact_table[sig - 1]; +#if defined(DEBUG_SIGNAL) + fprintf(stderr, "sigaction sig=%d act=0x%08x, oact=0x%08x\n", + sig, (int)act, (int)oact); +#endif + if (oact) { + oact->_sa_handler = tswapl(k->_sa_handler); + oact->sa_flags = tswapl(k->sa_flags); +#if !defined(TARGET_MIPS) + oact->sa_restorer = tswapl(k->sa_restorer); +#endif + oact->sa_mask = k->sa_mask; + } + if (act) { + /* FIXME: This is not threadsafe. */ + k->_sa_handler = tswapl(act->_sa_handler); + k->sa_flags = tswapl(act->sa_flags); +#if !defined(TARGET_MIPS) + k->sa_restorer = tswapl(act->sa_restorer); +#endif + k->sa_mask = act->sa_mask; + + /* we update the host linux signal state */ + host_sig = target_to_host_signal(sig); + if (host_sig != SIGSEGV && host_sig != SIGBUS) { + sigfillset(&act1.sa_mask); + act1.sa_flags = SA_SIGINFO; + if (k->sa_flags & TARGET_SA_RESTART) + act1.sa_flags |= SA_RESTART; + /* NOTE: it is important to update the host kernel signal + ignore state to avoid getting unexpected interrupted + syscalls */ + if (k->_sa_handler == TARGET_SIG_IGN) { + act1.sa_sigaction = (void *)SIG_IGN; + } else if (k->_sa_handler == TARGET_SIG_DFL) { + if (fatal_signal (sig)) + act1.sa_sigaction = host_signal_handler; + else + act1.sa_sigaction = (void *)SIG_DFL; + } else { + act1.sa_sigaction = host_signal_handler; + } + ret = sigaction(host_sig, &act1, NULL); + } + } + 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(&sc->cs) | 3); + cpu_x86_load_seg(env, R_SS, lduw(&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(sigset_t)]; + abi_ulong tuc_regspace[128] __attribute__((__aligned__(8))); +}; + +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; + + 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; +#if 0 + flush_icache_range((abi_ulong)rc, + (abi_ulong)(rc + 1)); +#endif + retcode = rc_addr + thumb; + } + + env->regs[0] = usig; + env->regs[13] = frame_addr; + env->regs[14] = retcode; + env->regs[15] = handler & (thumb ? ~1 : ~3); + env->thumb = thumb; + +#if 0 +#ifdef TARGET_CONFIG_CPU_32 + env->cpsr = cpsr; +#endif +#endif + + return 0; +} + +static void setup_sigframe_v2(struct target_ucontext_v2 *uc, + target_sigset_t *set, CPUState *env) +{ + struct target_sigaltstack stack; + int i; + + /* 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]); + /* FIXME: Save coprocessor signal frame. */ + 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; +} + +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(SIGSEGV /* , current */); + return 0; +} + +static int do_sigframe_return_v2(CPUState *env, target_ulong frame_addr, + struct target_ucontext_v2 *uc) +{ + sigset_t host_set; + + target_to_host_sigset(&host_set, &uc->tuc_sigmask); + sigprocmask(SIG_SETMASK, &host_set, NULL); + + if (restore_sigcontext(env, &uc->tuc_mcontext)) + 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; +} + +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(SIGSEGV /* , current */); + return 0; +} + +long do_sigreturn(CPUState *env) +{ + if (get_osversion() >= 0x020612) { + return do_sigreturn_v2(env); + } else { + return do_sigreturn_v1(env); + } +} + +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(SIGSEGV /* , current */); + return 0; +} + +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(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[6]; + struct sparc_stackf *fp; + abi_ulong callers_pc; + 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; + abi_ulong fpu_save_addr; + 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]); + } + + err |= __get_user(fpu_save_addr, &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 *uc_link; + abi_ulong uc_flags; + target_sigset_t uc_sigmask; + target_mcontext_t uc_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; + unsigned char fenab; + 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->uc_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->uc_sigmask.sig[0])) + goto do_sigsegv; + } else { + abi_ulong *src, *dst; + src = ucp->uc_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; + PUT_CCR(env, tstate >> 32); + 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->uc_mcontext.mc_fp)); + err |= __get_user(i7, &(ucp->uc_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; + err |= __get_user(fenab, &(ucp->uc_mcontext.mc_fpregs.mcfpu_enab)); + err |= __get_user(env->fprs, &(ucp->uc_mcontext.mc_fpregs.mcfpu_fprs)); + { + uint32_t *src, *dst; + src = ucp->uc_mcontext.mc_fpregs.mcfpu_fregs.sregs; + dst = env->fpr; + /* XXX: check that the CPU storage is the same as user context */ + for (i = 0; i < 64; i++, dst++, src++) + err |= __get_user(*dst, src); + } + err |= __get_user(env->fsr, + &(ucp->uc_mcontext.mc_fpregs.mcfpu_fsr)); + err |= __get_user(env->gsr, + &(ucp->uc_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(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->uc_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->uc_sigmask); + } else { + abi_ulong *src, *dst; + src = target_set.sig; + dst = ucp->uc_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 *src, *dst; + src = env->fpr; + dst = ucp->uc_mcontext.mc_fpregs.mcfpu_fregs.sregs; + /* XXX: check that the CPU storage is the same as user context */ + for (i = 0; i < 64; i++, dst++, src++) + err |= __put_user(*src, 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(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 */ + 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; +}; + +/* 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 0; + +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) +{ + fprintf(stderr, "setup_rt_frame: not implemented\n"); +} + +long do_rt_sigreturn(CPUState *env) +{ + fprintf(stderr, "do_rt_sigreturn: not implemented\n"); + return -TARGET_ENOSYS; +} + +#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 uc_flags; + struct target_ucontext *uc_link; + target_stack_t uc_stack; + struct target_sigcontext uc_mcontext; + target_sigset_t uc_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; + +#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 + + /* todo: save FPU registers here */ + + /* non-iBCS2 extensions.. */ + err |= __put_user(mask, &sc->oldmask); + + return err; +} + +static int restore_sigcontext(struct CPUState *regs, + struct target_sigcontext *sc) +{ + unsigned int err = 0; + +#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 + + /* todo: restore FPU registers here */ + + regs->tra = -1; /* disable syscall checks */ + 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] = (unsigned long) frame; + regs->gregs[4] = signal; /* Arg for signal handler */ + regs->gregs[5] = 0; + regs->gregs[6] = (unsigned long) &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(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.uc_flags); + err |= __put_user(0, (unsigned long *)&frame->uc.uc_link); + err |= __put_user((unsigned long)target_sigaltstack_used.ss_sp, + &frame->uc.uc_stack.ss_sp); + err |= __put_user(sas_ss_flags(regs->gregs[15]), + &frame->uc.uc_stack.ss_flags); + err |= __put_user(target_sigaltstack_used.ss_size, + &frame->uc.uc_stack.ss_size); + err |= setup_sigcontext(&frame->uc.uc_mcontext, + regs, set->sig[0]); + for(i = 0; i < TARGET_NSIG_WORDS; i++) { + err |= __put_user(set->sig[i], &frame->uc.uc_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] = (unsigned long) frame; + regs->gregs[4] = signal; /* Arg for signal handler */ + regs->gregs[5] = (unsigned long) &frame->info; + regs->gregs[6] = (unsigned long) &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(SIGSEGV); +} + +long do_sigreturn(CPUState *regs) +{ + struct target_sigframe *frame; + abi_ulong frame_addr; + sigset_t blocked; + target_sigset_t target_set; + 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)) + goto badframe; + + unlock_user_struct(frame, frame_addr, 0); + return regs->gregs[0]; + +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; + +#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.uc_sigmask); + sigprocmask(SIG_SETMASK, &blocked, NULL); + + if (restore_sigcontext(regs, &frame->uc.uc_mcontext)) + goto badframe; + + if (do_sigaltstack(frame_addr + + offsetof(struct target_rt_sigframe, uc.uc_stack), + 0, get_sp_from_cpustate(regs)) == -EFAULT) + goto badframe; + + unlock_user_struct(frame, frame_addr, 0); + return regs->gregs[0]; + +badframe: + unlock_user_struct(frame, frame_addr, 0); + force_sig(TARGET_SIGSEGV); + return 0; +} +#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] = (uint32_t) (unsigned long) frame; + env->regs[10] = sig; + env->pc = (unsigned long) ka->_sa_handler; + /* Link SRP so the guest returns through the trampoline. */ + env->pregs[PR_SRP] = (uint32_t) (unsigned long) &frame->retcode[0]; + + 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; +} + +#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) +{ + int sig; + abi_ulong handler; + sigset_t set, old_set; + target_sigset_t target_old_set; + struct emulated_sigtable *k; + struct target_sigaction *sa; + struct sigqueue *q; + TaskState *ts = cpu_env->opaque; + + if (!ts->signal_pending) + return; + + /* FIXME: This is not threadsafe. */ + k = ts->sigtab; + for(sig = 1; sig <= TARGET_NSIG; sig++) { + if (k->pending) + goto handle_signal; + k++; + } + /* if no signal is pending, just return */ + ts->signal_pending = 0; + return; + + handle_signal: +#ifdef DEBUG_SIGNAL + fprintf(stderr, "qemu: process signal %d\n", sig); +#endif + /* dequeue signal */ + q = k->first; + k->first = q->next; + if (!k->first) + k->pending = 0; + + sig = gdb_handlesig (cpu_env, sig); + if (!sig) { + sa = NULL; + handler = TARGET_SIG_IGN; + } else { + sa = &sigact_table[sig - 1]; + handler = sa->_sa_handler; + } + + if (handler == TARGET_SIG_DFL) { + /* default handler : ignore some signal. The other are job control or fatal */ + if (sig == TARGET_SIGTSTP || sig == TARGET_SIGTTIN || sig == TARGET_SIGTTOU) { + kill(getpid(),SIGSTOP); + } else if (sig != TARGET_SIGCHLD && + sig != TARGET_SIGURG && + sig != TARGET_SIGWINCH && + sig != TARGET_SIGCONT) { + force_sig(sig); + } + } else if (handler == TARGET_SIG_IGN) { + /* ignore sig */ + } else if (handler == TARGET_SIG_ERR) { + force_sig(sig); + } else { + /* compute the blocked signals during the handler execution */ + target_to_host_sigset(&set, &sa->sa_mask); + /* SA_NODEFER indicates that the current signal should not be + blocked during the handler */ + if (!(sa->sa_flags & TARGET_SA_NODEFER)) + sigaddset(&set, target_to_host_signal(sig)); + + /* block signals in the handler using Linux */ + sigprocmask(SIG_BLOCK, &set, &old_set); + /* save the previous blocked signal state to restore it at the + end of the signal execution (see do_sigreturn) */ + host_to_target_sigset_internal(&target_old_set, &old_set); + + /* if the CPU is in VM86 mode, we restore the 32 bit values */ +#if defined(TARGET_I386) && !defined(TARGET_X86_64) + { + CPUX86State *env = cpu_env; + if (env->eflags & VM_MASK) + save_v86_state(env); + } +#endif + /* prepare the stack frame of the virtual CPU */ + if (sa->sa_flags & TARGET_SA_SIGINFO) + setup_rt_frame(sig, sa, &q->info, &target_old_set, cpu_env); + else + setup_frame(sig, sa, &target_old_set, cpu_env); + if (sa->sa_flags & TARGET_SA_RESETHAND) + sa->_sa_handler = TARGET_SIG_DFL; + } + if (q != &k->info) + free_sigqueue(cpu_env, q); +}