+#elif defined(TARGET_ARM)
+
+struct target_sigcontext {
+ target_ulong trap_no;
+ target_ulong error_code;
+ target_ulong oldmask;
+ target_ulong arm_r0;
+ target_ulong arm_r1;
+ target_ulong arm_r2;
+ target_ulong arm_r3;
+ target_ulong arm_r4;
+ target_ulong arm_r5;
+ target_ulong arm_r6;
+ target_ulong arm_r7;
+ target_ulong arm_r8;
+ target_ulong arm_r9;
+ target_ulong arm_r10;
+ target_ulong arm_fp;
+ target_ulong arm_ip;
+ target_ulong arm_sp;
+ target_ulong arm_lr;
+ target_ulong arm_pc;
+ target_ulong arm_cpsr;
+ 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;
+ target_stack_t tuc_stack;
+ struct target_sigcontext tuc_mcontext;
+ target_sigset_t tuc_sigmask; /* mask last for extensibility */
+};
+
+struct sigframe
+{
+ struct target_sigcontext sc;
+ target_ulong extramask[TARGET_NSIG_WORDS-1];
+ target_ulong retcode;
+};
+
+struct rt_sigframe
+{
+ struct target_siginfo *pinfo;
+ void *puc;
+ struct target_siginfo info;
+ struct target_ucontext uc;
+ target_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 target_ulong retcodes[4] = {
+ SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN,
+ SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN
+};
+
+
+#define __put_user_error(x,p,e) __put_user(x, p)
+#define __get_user_error(x,p,e) __get_user(x, p)
+
+static inline int valid_user_regs(CPUState *regs)
+{
+ return 1;
+}
+
+static int
+setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
+ CPUState *env, unsigned long mask)
+{
+ int err = 0;
+
+ __put_user_error(env->regs[0], &sc->arm_r0, err);
+ __put_user_error(env->regs[1], &sc->arm_r1, err);
+ __put_user_error(env->regs[2], &sc->arm_r2, err);
+ __put_user_error(env->regs[3], &sc->arm_r3, err);
+ __put_user_error(env->regs[4], &sc->arm_r4, err);
+ __put_user_error(env->regs[5], &sc->arm_r5, err);
+ __put_user_error(env->regs[6], &sc->arm_r6, err);
+ __put_user_error(env->regs[7], &sc->arm_r7, err);
+ __put_user_error(env->regs[8], &sc->arm_r8, err);
+ __put_user_error(env->regs[9], &sc->arm_r9, err);
+ __put_user_error(env->regs[10], &sc->arm_r10, err);
+ __put_user_error(env->regs[11], &sc->arm_fp, err);
+ __put_user_error(env->regs[12], &sc->arm_ip, err);
+ __put_user_error(env->regs[13], &sc->arm_sp, err);
+ __put_user_error(env->regs[14], &sc->arm_lr, err);
+ __put_user_error(env->regs[15], &sc->arm_pc, err);
+#ifdef TARGET_CONFIG_CPU_32
+ __put_user_error(cpsr_read(env), &sc->arm_cpsr, err);
+#endif
+
+ __put_user_error(/* current->thread.trap_no */ 0, &sc->trap_no, err);
+ __put_user_error(/* current->thread.error_code */ 0, &sc->error_code, err);
+ __put_user_error(/* current->thread.address */ 0, &sc->fault_address, err);
+ __put_user_error(mask, &sc->oldmask, err);
+
+ return err;
+}
+
+static inline void *
+get_sigframe(struct emulated_sigaction *ka, CPUState *regs, int framesize)
+{
+ 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
+ /*
+ * ATPCS B01 mandates 8-byte alignment
+ */
+ return g2h((sp - framesize) & ~7);
+}
+
+static int
+setup_return(CPUState *env, struct emulated_sigaction *ka,
+ target_ulong *rc, void *frame, int usig)
+{
+ target_ulong handler = (target_ulong)ka->sa._sa_handler;
+ target_ulong retcode;
+ int thumb = 0;
+#if defined(TARGET_CONFIG_CPU_32)
+#if 0
+ target_ulong cpsr = env->cpsr;
+
+ /*
+ * Maybe we need to deliver a 32-bit signal to a 26-bit task.
+ */
+ if (ka->sa.sa_flags & SA_THIRTYTWO)
+ cpsr = (cpsr & ~MODE_MASK) | USR_MODE;
+
+#ifdef CONFIG_ARM_THUMB
+ if (elf_hwcap & HWCAP_THUMB) {
+ /*
+ * The LSB of the handler determines if we're going to
+ * be using THUMB or ARM mode for this signal handler.
+ */
+ thumb = handler & 1;
+
+ if (thumb)
+ cpsr |= T_BIT;
+ else
+ cpsr &= ~T_BIT;
+ }
+#endif
+#endif
+#endif /* TARGET_CONFIG_CPU_32 */
+
+ if (ka->sa.sa_flags & TARGET_SA_RESTORER) {
+ retcode = (target_ulong)ka->sa.sa_restorer;
+ } else {
+ unsigned int idx = thumb;
+
+ if (ka->sa.sa_flags & TARGET_SA_SIGINFO)
+ idx += 2;
+
+ if (__put_user(retcodes[idx], rc))
+ return 1;
+#if 0
+ flush_icache_range((target_ulong)rc,
+ (target_ulong)(rc + 1));
+#endif
+ retcode = ((target_ulong)rc) + thumb;
+ }
+
+ env->regs[0] = usig;
+ env->regs[13] = h2g(frame);
+ env->regs[14] = retcode;
+ env->regs[15] = handler & (thumb ? ~1 : ~3);
+
+#if 0
+#ifdef TARGET_CONFIG_CPU_32
+ env->cpsr = cpsr;
+#endif
+#endif
+
+ return 0;
+}
+
+static void setup_frame(int usig, struct emulated_sigaction *ka,
+ target_sigset_t *set, CPUState *regs)
+{
+ struct sigframe *frame = get_sigframe(ka, regs, sizeof(*frame));
+ int i, err = 0;
+
+ err |= setup_sigcontext(&frame->sc, /*&frame->fpstate,*/ regs, set->sig[0]);
+
+ for(i = 1; i < TARGET_NSIG_WORDS; i++) {
+ if (__put_user(set->sig[i], &frame->extramask[i - 1]))
+ return;
+ }
+
+ if (err == 0)
+ err = setup_return(regs, ka, &frame->retcode, frame, usig);
+ // return err;
+}
+
+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));
+ int i, err = 0;
+
+ if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
+ return /* 1 */;
+
+ __put_user_error(&frame->info, (target_ulong *)&frame->pinfo, err);
+ __put_user_error(&frame->uc, (target_ulong *)&frame->puc, err);
+ err |= 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, tuc_mcontext));
+
+ err |= setup_sigcontext(&frame->uc.tuc_mcontext, /*&frame->fpstate,*/
+ env, set->sig[0]);
+ for(i = 0; i < TARGET_NSIG_WORDS; i++) {
+ if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
+ return;
+ }
+
+ if (err == 0)
+ err = setup_return(env, ka, &frame->retcode, frame, usig);
+
+ if (err == 0) {
+ /*
+ * For realtime signals we must also set the second and third
+ * arguments for the signal handler.
+ * -- Peter Maydell <pmaydell@chiark.greenend.org.uk> 2000-12-06
+ */
+ env->regs[1] = (target_ulong)frame->pinfo;
+ env->regs[2] = (target_ulong)frame->puc;
+ }
+
+ // return err;
+}
+
+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, 0xffffffff);
+#endif
+
+ err |= !valid_user_regs(env);
+
+ return err;
+}
+
+long do_sigreturn(CPUState *env)
+{
+ struct sigframe *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 = (struct sigframe *)g2h(env->regs[13]);
+
+#if 0
+ if (verify_area(VERIFY_READ, frame, sizeof (*frame)))
+ goto badframe;
+#endif
+ 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
+ return env->regs[0];
+
+badframe:
+ force_sig(SIGSEGV /* , current */);
+ return 0;
+}
+
+long do_rt_sigreturn(CPUState *env)
+{
+ struct rt_sigframe *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 = (struct rt_sigframe *)env->regs[13];
+
+#if 0
+ if (verify_area(VERIFY_READ, frame, sizeof (*frame)))
+ goto badframe;
+#endif
+ 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 0
+ /* Send SIGTRAP if we're single-stepping */
+ if (ptrace_cancel_bpt(current))
+ send_sig(SIGTRAP, current, 1);
+#endif
+ return env->regs[0];
+
+badframe:
+ force_sig(SIGSEGV /* , current */);
+ return 0;
+}
+
+#elif defined(TARGET_SPARC)
+
+#define __SUNOS_MAXWIN 31
+
+/* This is what SunOS does, so shall I. */
+struct target_sigcontext {
+ target_ulong sigc_onstack; /* state to restore */
+
+ target_ulong sigc_mask; /* sigmask to restore */
+ target_ulong sigc_sp; /* stack pointer */
+ target_ulong sigc_pc; /* program counter */
+ target_ulong sigc_npc; /* next program counter */
+ target_ulong sigc_psr; /* for condition codes etc */
+ target_ulong sigc_g1; /* User uses these two registers */
+ target_ulong sigc_o0; /* within the trampoline code. */
+
+ /* Now comes information regarding the users window set
+ * at the time of the signal.
+ */
+ target_ulong sigc_oswins; /* outstanding windows */
+
+ /* stack ptrs for each regwin buf */
+ char *sigc_spbuf[__SUNOS_MAXWIN];
+
+ /* Windows to restore after signal */
+ struct {
+ target_ulong locals[8];
+ target_ulong ins[8];
+ } sigc_wbuf[__SUNOS_MAXWIN];
+};
+/* A Sparc stack frame */
+struct sparc_stackf {
+ target_ulong locals[8];
+ target_ulong ins[6];
+ struct sparc_stackf *fp;
+ target_ulong callers_pc;
+ char *structptr;
+ target_ulong xargs[6];
+ target_ulong xxargs[1];
+};
+
+typedef struct {
+ struct {
+ target_ulong psr;
+ target_ulong pc;
+ target_ulong npc;
+ target_ulong y;
+ target_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;
+ 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 */
+ 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;
+ qemu_siginfo_fpu_t *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_I6 6
+#define UREG_I7 7
+#define UREG_L0 8
+#define UREG_FP UREG_I6
+#define UREG_SP UREG_O6
+
+static inline void *get_sigframe(struct emulated_sigaction *sa, CPUState *env, unsigned long framesize)
+{
+ 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;
+ }
+#endif
+ return g2h(sp - framesize);
+}
+
+static int
+setup___siginfo(__siginfo_t *si, CPUState *env, target_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 emulated_sigaction *ka,
+ target_sigset_t *set, CPUState *env)
+{
+ struct target_signal_frame *sf;
+ int sigframe_size, err, i;
+
+ /* 1. Make sure everything is clean */
+ //synchronize_user_stack();
+
+ sigframe_size = NF_ALIGNEDSZ;
+
+ sf = (struct target_signal_frame *)
+ get_sigframe(ka, env, sigframe_size);
+
+ //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] = h2g(sf);
+ env->regwptr[UREG_I0] = sig;
+ env->regwptr[UREG_I1] = h2g(&sf->info);
+ env->regwptr[UREG_I2] = h2g(&sf->info);
+
+ /* 4. signal handler */
+ env->pc = (unsigned long) ka->sa._sa_handler;
+ env->npc = (env->pc + 4);
+ /* 5. return to kernel instructions */
+ if (ka->sa.sa_restorer)
+ env->regwptr[UREG_I7] = (unsigned long)ka->sa.sa_restorer;
+ else {
+ env->regwptr[UREG_I7] = h2g(&(sf->insns[0]) - 2);
+
+ /* mov __NR_sigreturn, %g1 */
+ err |= __put_user(0x821020d8, &sf->insns[0]);
+
+ /* t 0x10 */
+ err |= __put_user(0x91d02010, &sf->insns[1]);
+ if (err)
+ goto sigsegv;
+
+ /* Flush instruction space. */
+ //flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
+ // tb_flush(env);
+ }
+ return;
+
+ //sigill_and_return:
+ force_sig(TARGET_SIGILL);
+sigsegv:
+ //fprintf(stderr, "force_sig\n");
+ 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 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)
+{
+ struct target_signal_frame *sf;
+ uint32_t up_psr, pc, npc;
+ target_sigset_t set;
+ sigset_t host_set;
+ target_ulong fpu_save;
+ int err, i;
+
+ sf = (struct target_signal_frame *)g2h(env->regwptr[UREG_FP]);
+#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 0
+ if (verify_area (VERIFY_READ, sf, sizeof (*sf)))
+ goto segv_and_exit;
+#endif
+
+ if (((uint) sf) & 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, (target_ulong *)&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;
+
+ return env->regwptr[0];
+
+segv_and_exit:
+ force_sig(TARGET_SIGSEGV);
+}
+
+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, &sc->sc_pc);
+
+ #define save_gp_reg(i) do { \
+ err |= __put_user(regs->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->HI, &sc->sc_mdhi);
+ err |= __put_user(regs->LO, &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, &sc->sc_mdhi);
+ err |= __get_user(regs->LO, &sc->sc_mdlo);
+
+ #define restore_gp_reg(i) do { \
+ err |= __get_user(regs->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 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];
+
+ /*
+ * 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;
+
+#if 0
+ /* This is the X/Open sanctioned signal stack switching. */
+ if ((ka->sa.sa_flags & SA_ONSTACK) && (sas_ss_flags (sp) == 0))
+ sp = current->sas_ss_sp + current->sas_ss_size;
+#endif
+
+ 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] = sig;
+ regs->gpr[ 5] = 0;
+ regs->gpr[ 6] = h2g(&frame->sf_sc);
+ regs->gpr[29] = h2g(frame);
+ regs->gpr[31] = 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->gpr[25] = 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];
+ 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->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;
+}
+