/*
* Emulation of Linux signals
- *
+ *
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
#include <errno.h>
#include <sys/ucontext.h>
+#include "target_signal.h"
#include "qemu.h"
//#define DEBUG_SIGNAL
first signal, we put it here */
};
+struct target_sigaltstack target_sigaltstack_used = {
+ .ss_sp = 0,
+ .ss_size = 0,
+ .ss_flags = TARGET_SS_DISABLE,
+};
+
static struct emulated_sigaction sigact_table[TARGET_NSIG];
static struct sigqueue sigqueue_table[MAX_SIGQUEUE_SIZE]; /* siginfo queue */
static struct sigqueue *first_free; /* first free siginfo queue entry */
static int signal_pending; /* non zero if a signal may be pending */
-static void host_signal_handler(int host_signum, siginfo_t *info,
+static void host_signal_handler(int host_signum, siginfo_t *info,
void *puc);
static uint8_t host_to_target_signal_table[65] = {
};
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)
{
return host_to_target_signal_table[sig];
return target_to_host_signal_table[sig];
}
-static void host_to_target_sigset_internal(target_sigset_t *d,
+static void host_to_target_sigset_internal(target_sigset_t *d,
const sigset_t *s)
{
int i;
unsigned long sigmask;
uint32_t target_sigmask;
-
+
sigmask = ((unsigned long *)s)[0];
target_sigmask = 0;
for(i = 0; i < 32; i++) {
- if (sigmask & (1 << i))
+ if (sigmask & (1 << i))
target_sigmask |= 1 << (host_to_target_signal(i + 1) - 1);
}
#if TARGET_LONG_BITS == 32 && HOST_LONG_BITS == 32
target_sigmask = s->sig[0];
sigmask = 0;
for(i = 0; i < 32; i++) {
- if (target_sigmask & (1 << i))
+ if (target_sigmask & (1 << i))
sigmask |= 1 << (target_to_host_signal(i + 1) - 1);
}
#if TARGET_LONG_BITS == 32 && HOST_LONG_BITS == 32
s1.sig[i] = tswapl(s->sig[i]);
target_to_host_sigset_internal(d, &s1);
}
-
-void host_to_target_old_sigset(target_ulong *old_sigset,
+
+void host_to_target_old_sigset(target_ulong *old_sigset,
const sigset_t *sigset)
{
target_sigset_t d;
*old_sigset = d.sig[0];
}
-void target_to_host_old_sigset(sigset_t *sigset,
+void target_to_host_old_sigset(sigset_t *sigset,
const target_ulong *old_sigset)
{
target_sigset_t d;
/* siginfo conversion */
-static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo,
+static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo,
const siginfo_t *info)
{
int sig;
tinfo->si_signo = sig;
tinfo->si_errno = 0;
tinfo->si_code = 0;
- if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
+ 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 =
+ tinfo->_sifields._rt._sigval.sival_ptr =
(target_ulong)info->si_value.sival_ptr;
}
}
-static void tswap_siginfo(target_siginfo_t *tinfo,
+static void tswap_siginfo(target_siginfo_t *tinfo,
const target_siginfo_t *info)
{
int sig;
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 ||
+ if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
sig == SIGBUS || sig == SIGTRAP) {
- tinfo->_sifields._sigfault._addr =
+ 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 =
+ tinfo->_sifields._rt._sigval.sival_ptr =
tswapl(info->_sifields._rt._sigval.sival_ptr);
}
}
}
/* XXX: we support only POSIX RT signals are used. */
-/* XXX: find a solution for 64 bit (additionnal malloced data is needed) */
+/* 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_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 =
+ info->si_value.sival_ptr =
(void *)tswapl(tinfo->_sifields._rt._sigval.sival_ptr);
}
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. */
sigfillset(&act.sa_mask);
for(i = 1; i < NSIG; i++) {
sigaction(i, &act, NULL);
}
-
+
memset(sigact_table, 0, sizeof(sigact_table));
first_free = &sigqueue_table[0];
- for(i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++)
+ for(i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++)
sigqueue_table[i].next = &sigqueue_table[i + 1];
sigqueue_table[MAX_SIGQUEUE_SIZE - 1].next = NULL;
}
{
int host_sig;
host_sig = target_to_host_signal(sig);
- fprintf(stderr, "qemu: uncaught target signal %d (%s) - exiting\n",
+ fprintf(stderr, "qemu: uncaught target signal %d (%s) - exiting\n",
sig, strsignal(host_sig));
#if 1
_exit(-host_sig);
target_ulong handler;
#if defined(DEBUG_SIGNAL)
- fprintf(stderr, "queue_signal: sig=%d\n",
+ fprintf(stderr, "queue_signal: sig=%d\n",
sig);
#endif
k = &sigact_table[sig - 1];
handler = k->sa._sa_handler;
if (handler == TARGET_SIG_DFL) {
/* default handler : ignore some signal. The other are fatal */
- if (sig != TARGET_SIGCHLD &&
- sig != TARGET_SIGURG &&
+ if (sig != TARGET_SIGCHLD &&
+ sig != TARGET_SIGURG &&
sig != TARGET_SIGWINCH) {
force_sig(sig);
} else {
}
}
-static void host_signal_handler(int host_signum, siginfo_t *info,
+static void host_signal_handler(int host_signum, siginfo_t *info,
void *puc)
{
int sig;
/* the CPU emulator uses some host signals to detect exceptions,
we we forward to it some signals */
- if (host_signum == SIGSEGV || host_signum == SIGBUS
+ if (host_signum == SIGSEGV || host_signum == SIGBUS
#if defined(TARGET_I386) && defined(USE_CODE_COPY)
|| host_signum == SIGFPE
#endif
}
}
+int do_sigaltstack(const struct target_sigaltstack *uss,
+ struct target_sigaltstack *uoss,
+ target_ulong sp)
+{
+ int ret;
+ struct target_sigaltstack oss;
+
+ /* XXX: test errors */
+ if(uoss)
+ {
+ __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)
+ {
+ struct target_sigaltstack ss;
+
+ ret = -EFAULT;
+ if (!access_ok(VERIFY_READ, uss, sizeof(*uss))
+ || __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;
+
+ ret = -EPERM;
+ if (on_sig_stack(sp))
+ goto out;
+
+ ret = -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 = -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) {
+ ret = -EFAULT;
+ if (!access_ok(VERIFY_WRITE, uoss, sizeof(oss)))
+ goto out;
+ memcpy(uoss, &oss, sizeof(oss));
+ }
+
+ ret = 0;
+out:
+ return ret;
+}
+
int do_sigaction(int sig, const struct target_sigaction *act,
struct target_sigaction *oact)
{
struct sigaction act1;
int host_sig;
- if (sig < 1 || sig > TARGET_NSIG)
+ if (sig < 1 || sig > TARGET_NSIG || sig == SIGKILL || sig == SIGSTOP)
return -EINVAL;
k = &sigact_table[sig - 1];
#if defined(DEBUG_SIGNAL)
- fprintf(stderr, "sigaction sig=%d act=0x%08x, oact=0x%08x\n",
+ 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._sa_handler);
oact->sa_flags = tswapl(k->sa.sa_flags);
+#if !defined(TARGET_MIPS)
oact->sa_restorer = tswapl(k->sa.sa_restorer);
+#endif
oact->sa_mask = k->sa.sa_mask;
}
if (act) {
k->sa._sa_handler = tswapl(act->_sa_handler);
k->sa.sa_flags = tswapl(act->sa_flags);
+#if !defined(TARGET_MIPS)
k->sa.sa_restorer = tswapl(act->sa_restorer);
+#endif
k->sa.sa_mask = act->sa_mask;
/* we update the host linux signal state */
#define offsetof(type, field) ((size_t) &((type *)0)->field)
#endif
-static inline int copy_siginfo_to_user(target_siginfo_t *tinfo,
+static inline int copy_siginfo_to_user(target_siginfo_t *tinfo,
const target_siginfo_t *info)
{
tswap_siginfo(tinfo, info);
target_ulong cr2;
};
-typedef struct target_sigaltstack {
- target_ulong ss_sp;
- int ss_flags;
- target_ulong ss_size;
-} target_stack_t;
-
struct target_ucontext {
target_ulong tuc_flags;
target_ulong tuc_link;
/* Default to using normal stack */
esp = env->regs[R_ESP];
-#if 0
/* This is the X/Open sanctioned signal stack switching. */
- if (ka->sa.sa_flags & SA_ONSTACK) {
- if (sas_ss_flags(esp) == 0)
- esp = current->sas_ss_sp + current->sas_ss_size;
- }
+ if (ka->sa.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
-#endif
+ else
if ((env->segs[R_SS].selector & 0xffff) != __USER_DS &&
!(ka->sa.sa_flags & TARGET_SA_RESTORER) &&
ka->sa.sa_restorer) {
err |= __put_user(frame->retcode, &frame->pretcode);
/* This is popl %eax ; movl $,%eax ; int $0x80 */
err |= __put_user(0xb858, (short *)(frame->retcode+0));
+#if defined(TARGET_X86_64)
+#warning "Fix this !"
+#else
err |= __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2));
+#endif
err |= __put_user(0x80cd, (short *)(frame->retcode+6));
}
force_sig(TARGET_SIGSEGV /* , current */);
}
-static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
+static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUX86State *env)
{
/* Create the ucontext. */
err |= __put_user(0, &frame->uc.tuc_flags);
err |= __put_user(0, &frame->uc.tuc_link);
- err |= __put_user(/*current->sas_ss_sp*/ 0,
+ err |= __put_user(target_sigaltstack_used.ss_sp,
&frame->uc.tuc_stack.ss_sp);
- err |= __put_user(/* sas_ss_flags(regs->esp) */ 0,
+ err |= __put_user(sas_ss_flags(get_sp_from_cpustate(env)),
&frame->uc.tuc_stack.ss_flags);
- err |= __put_user(/* current->sas_ss_size */ 0,
+ 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]);
cpu_x86_load_seg(env, R_CS, lduw(&sc->cs) | 3);
cpu_x86_load_seg(env, R_SS, lduw(&sc->ss) | 3);
-
+
{
unsigned int tmpflags;
tmpflags = ldl(&sc->eflags);
target_to_host_sigset_internal(&set, &target_set);
sigprocmask(SIG_SETMASK, &set, NULL);
-
+
/* restore registers */
if (restore_sigcontext(env, &frame->sc, &eax))
goto badframe;
{
struct rt_sigframe *frame = (struct rt_sigframe *)g2h(env->regs[R_ESP] - 4);
sigset_t set;
- // stack_t st;
int eax;
#if 0
#endif
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 0
- if (__copy_from_user(&st, &frame->uc.tuc_stack, sizeof(st)))
+ if (do_sigaltstack(&frame->uc.tuc_stack, NULL, get_sp_from_cpustate(env)) == -EFAULT)
goto badframe;
- /* It is more difficult to avoid calling this function than to
- call it and ignore errors. */
- do_sigaltstack(&st, NULL, regs->esp);
-#endif
+
return eax;
badframe:
target_ulong fault_address;
};
-typedef struct target_sigaltstack {
- target_ulong ss_sp;
- int ss_flags;
- target_ulong ss_size;
-} target_stack_t;
-
struct target_ucontext {
target_ulong tuc_flags;
target_ulong tuc_link;
{
unsigned long sp = regs->regs[13];
-#if 0
/*
* This is the X/Open sanctioned signal stack switching.
*/
- if ((ka->sa.sa_flags & SA_ONSTACK) && !sas_ss_flags(sp))
- sp = current->sas_ss_sp + current->sas_ss_size;
-#endif
+ if ((ka->sa.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
*/
else
cpsr &= ~T_BIT;
}
-#endif
-#endif
+#endif /* CONFIG_ARM_THUMB */
+#endif /* 0 */
#endif /* TARGET_CONFIG_CPU_32 */
if (ka->sa.sa_flags & TARGET_SA_RESTORER) {
// return err;
}
-static void setup_rt_frame(int usig, struct emulated_sigaction *ka,
+static void setup_rt_frame(int usig, struct emulated_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUState *env)
{
struct rt_sigframe *frame = get_sigframe(ka, env, sizeof(*frame));
+ struct target_sigaltstack stack;
int i, err = 0;
if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
/* Clear all the bits of the ucontext we don't use. */
memset(&frame->uc, 0, offsetof(struct target_ucontext, 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);
+ if (!access_ok(VERIFY_WRITE, &frame->uc.tuc_stack, sizeof(stack)))
+ err = 1;
+ else
+ memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
+
err |= setup_sigcontext(&frame->uc.tuc_mcontext, /*&frame->fpstate,*/
env, set->sig[0]);
for(i = 0; i < TARGET_NSIG_WORDS; i++) {
if (restore_sigcontext(env, &frame->uc.tuc_mcontext))
goto badframe;
+ if (do_sigaltstack(&frame->uc.tuc_stack, NULL, get_sp_from_cpustate(env)) == -EFAULT)
+ goto badframe;
+
#if 0
/* Send SIGTRAP if we're single-stepping */
if (ptrace_cancel_bpt(current))
unsigned long *insn_addr;
unsigned long insn;
} si_fpqueue [16];
-} __siginfo_fpu_t;
+} qemu_siginfo_fpu_t;
struct target_signal_frame {
struct sparc_stackf ss;
__siginfo_t info;
- __siginfo_fpu_t *fpu_save;
+ qemu_siginfo_fpu_t *fpu_save;
target_ulong insns[2] __attribute__ ((aligned (8)));
target_ulong extramask[TARGET_NSIG_WORDS - 1];
target_ulong extra_size; /* Should be 0 */
- __siginfo_fpu_t fpu_state;
+ qemu_siginfo_fpu_t fpu_state;
};
struct target_rt_signal_frame {
struct sparc_stackf ss;
siginfo_t info;
target_ulong regs[20];
sigset_t mask;
- __siginfo_fpu_t *fpu_save;
+ qemu_siginfo_fpu_t *fpu_save;
unsigned int insns[2];
stack_t stack;
unsigned int extra_size; /* Should be 0 */
- __siginfo_fpu_t fpu_state;
+ qemu_siginfo_fpu_t fpu_state;
};
#define UREG_O0 16
unsigned long sp;
sp = env->regwptr[UREG_FP];
-#if 0
/* This is the X/Open sanctioned signal stack switching. */
- if (sa->sa_flags & TARGET_SA_ONSTACK) {
- if (!on_sig_stack(sp) && !((current->sas_ss_sp + current->sas_ss_size) & 7))
- sp = current->sas_ss_sp + current->sas_ss_size;
+ if (sa->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;
}
-#endif
return g2h(sp - framesize);
}
force_sig(TARGET_SIGSEGV);
}
static inline int
-restore_fpu_state(CPUState *env, __siginfo_fpu_t *fpu)
+restore_fpu_state(CPUState *env, qemu_siginfo_fpu_t *fpu)
{
int err;
#if 0
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);
}
-static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
+static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUState *env)
{
return -ENOSYS;
}
+#elif defined(TARGET_MIPS64)
+
+# warning signal handling not implemented
+
+static void setup_frame(int sig, struct emulated_sigaction *ka,
+ target_sigset_t *set, CPUState *env)
+{
+ fprintf(stderr, "setup_frame: not implemented\n");
+}
+
+static void setup_rt_frame(int sig, struct emulated_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 -ENOSYS;
+}
+
+long do_rt_sigreturn(CPUState *env)
+{
+ fprintf(stderr, "do_rt_sigreturn: not implemented\n");
+ return -ENOSYS;
+}
+
+#elif defined(TARGET_MIPSN32)
+
+# warning signal handling not implemented
+
+static void setup_frame(int sig, struct emulated_sigaction *ka,
+ target_sigset_t *set, CPUState *env)
+{
+ fprintf(stderr, "setup_frame: not implemented\n");
+}
+
+static void setup_rt_frame(int sig, struct emulated_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 -ENOSYS;
+}
+
+long do_rt_sigreturn(CPUState *env)
+{
+ fprintf(stderr, "do_rt_sigreturn: not implemented\n");
+ return -ENOSYS;
+}
+
+#elif defined(TARGET_MIPS)
+
+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->PC[regs->current_tc], &sc->sc_pc);
+
+#define save_gp_reg(i) do { \
+ err |= __put_user(regs->gpr[i][regs->current_tc], &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->HI[0][regs->current_tc], &sc->sc_mdhi);
+ err |= __put_user(regs->LO[0][regs->current_tc], &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->HI[0][regs->current_tc], &sc->sc_mdhi);
+ err |= __get_user(regs->LO[0][regs->current_tc], &sc->sc_mdlo);
+
+#define restore_gp_reg(i) do { \
+ err |= __get_user(regs->gpr[i][regs->current_tc], &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 void *
+get_sigframe(struct emulated_sigaction *ka, CPUState *regs, size_t frame_size)
+{
+ unsigned long sp;
+
+ /* Default to using normal stack */
+ sp = regs->gpr[29][regs->current_tc];
+
+ /*
+ * 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.sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
+ sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
+ }
+
+ return g2h((sp - frame_size) & ~7);
+}
+
+static void setup_frame(int sig, struct emulated_sigaction * ka,
+ target_sigset_t *set, CPUState *regs)
+{
+ struct sigframe *frame;
+ int i;
+
+ frame = get_sigframe(ka, regs, sizeof(*frame));
+ if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
+ 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->gpr[ 4][regs->current_tc] = sig;
+ regs->gpr[ 5][regs->current_tc] = 0;
+ regs->gpr[ 6][regs->current_tc] = h2g(&frame->sf_sc);
+ regs->gpr[29][regs->current_tc] = h2g(frame);
+ regs->gpr[31][regs->current_tc] = h2g(frame->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->PC[regs->current_tc] = regs->gpr[25][regs->current_tc] = ka->sa._sa_handler;
+ return;
+
+give_sigsegv:
+ force_sig(TARGET_SIGSEGV/*, current*/);
+ return;
+}
+
+long do_sigreturn(CPUState *regs)
+{
+ struct sigframe *frame;
+ sigset_t blocked;
+ target_sigset_t target_set;
+ int i;
+
+#if defined(DEBUG_SIGNAL)
+ fprintf(stderr, "do_sigreturn\n");
+#endif
+ frame = (struct sigframe *) regs->gpr[29][regs->current_tc];
+ if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+ 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->PC[regs->current_tc] = 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 emulated_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 -ENOSYS;
+}
#else
fprintf(stderr, "setup_frame: not implemented\n");
}
-static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
+static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUState *env)
{
target_sigset_t target_old_set;
struct emulated_sigaction *k;
struct sigqueue *q;
-
+
if (!signal_pending)
return;
k->first = q->next;
if (!k->first)
k->pending = 0;
-
+
sig = gdb_handlesig (cpu_env, sig);
if (!sig) {
fprintf (stderr, "Lost signal\n");
handler = k->sa._sa_handler;
if (handler == TARGET_SIG_DFL) {
/* default handler : ignore some signal. The other are fatal */
- if (sig != TARGET_SIGCHLD &&
- sig != TARGET_SIGURG &&
+ if (sig != TARGET_SIGCHLD &&
+ sig != TARGET_SIGURG &&
sig != TARGET_SIGWINCH) {
force_sig(sig);
}
blocked during the handler */
if (!(k->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
host_to_target_sigset_internal(&target_old_set, &old_set);
/* if the CPU is in VM86 mode, we restore the 32 bit values */
-#ifdef TARGET_I386
+#if defined(TARGET_I386) && !defined(TARGET_X86_64)
{
CPUX86State *env = cpu_env;
if (env->eflags & VM_MASK)
if (q != &k->info)
free_sigqueue(q);
}
-
-
projects / qemu / blobdiff