diff options
Diffstat (limited to 'linux-user/signal.c')
| -rw-r--r-- | linux-user/signal.c | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/linux-user/signal.c b/linux-user/signal.c index 9c9c7eb63d..371927e2a2 100644 --- a/linux-user/signal.c +++ b/linux-user/signal.c @@ -3011,6 +3011,222 @@ badframe: force_sig(TARGET_SIGSEGV); return 0; } +#elif defined(TARGET_MICROBLAZE) + +struct target_sigcontext { + struct target_pt_regs regs; /* needs to be first */ + uint32_t oldmask; +}; + +/* Signal frames. */ +struct target_signal_frame { + struct target_sigcontext sc; + uint32_t extramask[TARGET_NSIG_WORDS - 1]; + uint32_t tramp[2]; +}; + +struct rt_signal_frame { + struct siginfo info; + struct ucontext uc; + uint32_t tramp[2]; +}; + +static void setup_sigcontext(struct target_sigcontext *sc, CPUState *env) +{ + __put_user(env->regs[0], &sc->regs.r0); + __put_user(env->regs[1], &sc->regs.r1); + __put_user(env->regs[2], &sc->regs.r2); + __put_user(env->regs[3], &sc->regs.r3); + __put_user(env->regs[4], &sc->regs.r4); + __put_user(env->regs[5], &sc->regs.r5); + __put_user(env->regs[6], &sc->regs.r6); + __put_user(env->regs[7], &sc->regs.r7); + __put_user(env->regs[8], &sc->regs.r8); + __put_user(env->regs[9], &sc->regs.r9); + __put_user(env->regs[10], &sc->regs.r10); + __put_user(env->regs[11], &sc->regs.r11); + __put_user(env->regs[12], &sc->regs.r12); + __put_user(env->regs[13], &sc->regs.r13); + __put_user(env->regs[14], &sc->regs.r14); + __put_user(env->regs[15], &sc->regs.r15); + __put_user(env->regs[16], &sc->regs.r16); + __put_user(env->regs[17], &sc->regs.r17); + __put_user(env->regs[18], &sc->regs.r18); + __put_user(env->regs[19], &sc->regs.r19); + __put_user(env->regs[20], &sc->regs.r20); + __put_user(env->regs[21], &sc->regs.r21); + __put_user(env->regs[22], &sc->regs.r22); + __put_user(env->regs[23], &sc->regs.r23); + __put_user(env->regs[24], &sc->regs.r24); + __put_user(env->regs[25], &sc->regs.r25); + __put_user(env->regs[26], &sc->regs.r26); + __put_user(env->regs[27], &sc->regs.r27); + __put_user(env->regs[28], &sc->regs.r28); + __put_user(env->regs[29], &sc->regs.r29); + __put_user(env->regs[30], &sc->regs.r30); + __put_user(env->regs[31], &sc->regs.r31); + __put_user(env->sregs[SR_PC], &sc->regs.pc); +} + +static void restore_sigcontext(struct target_sigcontext *sc, CPUState *env) +{ + __get_user(env->regs[0], &sc->regs.r0); + __get_user(env->regs[1], &sc->regs.r1); + __get_user(env->regs[2], &sc->regs.r2); + __get_user(env->regs[3], &sc->regs.r3); + __get_user(env->regs[4], &sc->regs.r4); + __get_user(env->regs[5], &sc->regs.r5); + __get_user(env->regs[6], &sc->regs.r6); + __get_user(env->regs[7], &sc->regs.r7); + __get_user(env->regs[8], &sc->regs.r8); + __get_user(env->regs[9], &sc->regs.r9); + __get_user(env->regs[10], &sc->regs.r10); + __get_user(env->regs[11], &sc->regs.r11); + __get_user(env->regs[12], &sc->regs.r12); + __get_user(env->regs[13], &sc->regs.r13); + __get_user(env->regs[14], &sc->regs.r14); + __get_user(env->regs[15], &sc->regs.r15); + __get_user(env->regs[16], &sc->regs.r16); + __get_user(env->regs[17], &sc->regs.r17); + __get_user(env->regs[18], &sc->regs.r18); + __get_user(env->regs[19], &sc->regs.r19); + __get_user(env->regs[20], &sc->regs.r20); + __get_user(env->regs[21], &sc->regs.r21); + __get_user(env->regs[22], &sc->regs.r22); + __get_user(env->regs[23], &sc->regs.r23); + __get_user(env->regs[24], &sc->regs.r24); + __get_user(env->regs[25], &sc->regs.r25); + __get_user(env->regs[26], &sc->regs.r26); + __get_user(env->regs[27], &sc->regs.r27); + __get_user(env->regs[28], &sc->regs.r28); + __get_user(env->regs[29], &sc->regs.r29); + __get_user(env->regs[30], &sc->regs.r30); + __get_user(env->regs[31], &sc->regs.r31); + __get_user(env->sregs[SR_PC], &sc->regs.pc); +} + +static abi_ulong get_sigframe(struct target_sigaction *ka, + CPUState *env, int frame_size) +{ + abi_ulong sp = env->regs[1]; + + if ((ka->sa_flags & SA_ONSTACK) != 0 && !on_sig_stack(sp)) + sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; + + return ((sp - frame_size) & -8UL); +} + +static void setup_frame(int sig, struct target_sigaction *ka, + target_sigset_t *set, CPUState *env) +{ + struct target_signal_frame *frame; + abi_ulong frame_addr; + int err = 0; + int i; + + frame_addr = get_sigframe(ka, env, sizeof *frame); + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) + goto badframe; + + /* Save the mask. */ + err |= __put_user(set->sig[0], &frame->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); + + /* Set up to return from userspace. If provided, use a stub + already in userspace. */ + /* minus 8 is offset to cater for "rtsd r15,8" offset */ + if (ka->sa_flags & TARGET_SA_RESTORER) { + env->regs[15] = ((unsigned long)ka->sa_restorer)-8; + } else { + uint32_t t; + /* Note, these encodings are _big endian_! */ + /* addi r12, r0, __NR_sigreturn */ + t = 0x31800000UL | TARGET_NR_sigreturn; + err |= __put_user(t, frame->tramp + 0); + /* brki r14, 0x8 */ + t = 0xb9cc0008UL; + err |= __put_user(t, frame->tramp + 1); + + /* Return from sighandler will jump to the tramp. + Negative 8 offset because return is rtsd r15, 8 */ + env->regs[15] = ((unsigned long)frame->tramp) - 8; + } + + if (err) + goto badframe; + + /* Set up registers for signal handler */ + env->regs[1] = (unsigned long) frame; + /* Signal handler args: */ + env->regs[5] = sig; /* Arg 0: signum */ + env->regs[6] = (unsigned long) &frame->sc; /* arg 1: sigcontext */ + + /* Offset of 4 to handle microblaze rtid r14, 0 */ + env->sregs[SR_PC] = (unsigned long)ka->_sa_handler; + + unlock_user_struct(frame, frame_addr, 1); + return; + badframe: + unlock_user_struct(frame, frame_addr, 1); + force_sig(TARGET_SIGSEGV); +} + +static void setup_rt_frame(int sig, struct target_sigaction *ka, + target_siginfo_t *info, + target_sigset_t *set, CPUState *env) +{ + fprintf(stderr, "Microblaze setup_rt_frame: not implemented\n"); +} + +long do_sigreturn(CPUState *env) +{ + struct target_signal_frame *frame; + abi_ulong frame_addr; + target_sigset_t target_set; + sigset_t set; + int i; + + frame_addr = env->regs[R_SP]; + /* Make sure the guest isn't playing games. */ + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) + goto badframe; + + /* Restore blocked signals */ + if (__get_user(target_set.sig[0], &frame->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); + /* We got here through a sigreturn syscall, our path back is via an + rtb insn so setup r14 for that. */ + env->regs[14] = env->sregs[SR_PC]; + + unlock_user_struct(frame, frame_addr, 0); + return env->regs[10]; + badframe: + unlock_user_struct(frame, frame_addr, 0); + force_sig(TARGET_SIGSEGV); +} + +long do_rt_sigreturn(CPUState *env) +{ + fprintf(stderr, "Microblaze do_rt_sigreturn: not implemented\n"); + return -TARGET_ENOSYS; +} + #elif defined(TARGET_CRIS) struct target_sigcontext { |