diff options
Diffstat (limited to '')
| -rw-r--r-- | linux-user/main.c | 225 |
1 files changed, 155 insertions, 70 deletions
diff --git a/linux-user/main.c b/linux-user/main.c index 95ed11d85c..b2bc6ab2f7 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -285,6 +285,7 @@ void cpu_loop(CPUX86State *env) CPUState *cs = CPU(x86_env_get_cpu(env)); int trapnr; abi_ulong pc; + abi_ulong ret; target_siginfo_t info; for(;;) { @@ -294,28 +295,38 @@ void cpu_loop(CPUX86State *env) switch(trapnr) { case 0x80: /* linux syscall from int $0x80 */ - env->regs[R_EAX] = do_syscall(env, - env->regs[R_EAX], - env->regs[R_EBX], - env->regs[R_ECX], - env->regs[R_EDX], - env->regs[R_ESI], - env->regs[R_EDI], - env->regs[R_EBP], - 0, 0); + ret = do_syscall(env, + env->regs[R_EAX], + env->regs[R_EBX], + env->regs[R_ECX], + env->regs[R_EDX], + env->regs[R_ESI], + env->regs[R_EDI], + env->regs[R_EBP], + 0, 0); + if (ret == -TARGET_ERESTARTSYS) { + env->eip -= 2; + } else if (ret != -TARGET_QEMU_ESIGRETURN) { + env->regs[R_EAX] = ret; + } break; #ifndef TARGET_ABI32 case EXCP_SYSCALL: /* linux syscall from syscall instruction */ - env->regs[R_EAX] = do_syscall(env, - env->regs[R_EAX], - env->regs[R_EDI], - env->regs[R_ESI], - env->regs[R_EDX], - env->regs[10], - env->regs[8], - env->regs[9], - 0, 0); + ret = do_syscall(env, + env->regs[R_EAX], + env->regs[R_EDI], + env->regs[R_ESI], + env->regs[R_EDX], + env->regs[10], + env->regs[8], + env->regs[9], + 0, 0); + if (ret == -TARGET_ERESTARTSYS) { + env->eip -= 2; + } else if (ret != -TARGET_QEMU_ESIGRETURN) { + env->regs[R_EAX] = ret; + } break; #endif case EXCP0B_NOSEG: @@ -716,6 +727,7 @@ void cpu_loop(CPUARMState *env) unsigned int n, insn; target_siginfo_t info; uint32_t addr; + abi_ulong ret; for(;;) { cpu_exec_start(cs); @@ -854,15 +866,20 @@ void cpu_loop(CPUARMState *env) break; } } else { - env->regs[0] = do_syscall(env, - n, - env->regs[0], - env->regs[1], - env->regs[2], - env->regs[3], - env->regs[4], - env->regs[5], - 0, 0); + ret = do_syscall(env, + n, + env->regs[0], + env->regs[1], + env->regs[2], + env->regs[3], + env->regs[4], + env->regs[5], + 0, 0); + if (ret == -TARGET_ERESTARTSYS) { + env->regs[15] -= env->thumb ? 2 : 4; + } else if (ret != -TARGET_QEMU_ESIGRETURN) { + env->regs[0] = ret; + } } } else { goto error; @@ -1045,6 +1062,7 @@ void cpu_loop(CPUARMState *env) { CPUState *cs = CPU(arm_env_get_cpu(env)); int trapnr, sig; + abi_long ret; target_siginfo_t info; for (;;) { @@ -1054,15 +1072,20 @@ void cpu_loop(CPUARMState *env) switch (trapnr) { case EXCP_SWI: - env->xregs[0] = do_syscall(env, - env->xregs[8], - env->xregs[0], - env->xregs[1], - env->xregs[2], - env->xregs[3], - env->xregs[4], - env->xregs[5], - 0, 0); + ret = do_syscall(env, + env->xregs[8], + env->xregs[0], + env->xregs[1], + env->xregs[2], + env->xregs[3], + env->xregs[4], + env->xregs[5], + 0, 0); + if (ret == -TARGET_ERESTARTSYS) { + env->pc -= 4; + } else if (ret != -TARGET_QEMU_ESIGRETURN) { + env->xregs[0] = ret; + } break; case EXCP_INTERRUPT: /* just indicate that signals should be handled asap */ @@ -1148,7 +1171,7 @@ void cpu_loop(CPUUniCore32State *env) cpu_set_tls(env, env->regs[0]); env->regs[0] = 0; } else { - env->regs[0] = do_syscall(env, + abi_long ret = do_syscall(env, n, env->regs[0], env->regs[1], @@ -1157,6 +1180,11 @@ void cpu_loop(CPUUniCore32State *env) env->regs[4], env->regs[5], 0, 0); + if (ret == -TARGET_ERESTARTSYS) { + env->regs[31] -= 4; + } else if (ret != -TARGET_QEMU_ESIGRETURN) { + env->regs[0] = ret; + } } } else { goto error; @@ -1353,6 +1381,9 @@ void cpu_loop (CPUSPARCState *env) env->regwptr[2], env->regwptr[3], env->regwptr[4], env->regwptr[5], 0, 0); + if (ret == -TARGET_ERESTARTSYS || ret == -TARGET_QEMU_ESIGRETURN) { + break; + } if ((abi_ulong)ret >= (abi_ulong)(-515)) { #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) env->xcc |= PSR_CARRY; @@ -1964,6 +1995,10 @@ void cpu_loop(CPUPPCState *env) ret = do_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4], env->gpr[5], env->gpr[6], env->gpr[7], env->gpr[8], 0, 0); + if (ret == -TARGET_ERESTARTSYS) { + env->nip -= 4; + break; + } if (ret == (target_ulong)(-TARGET_QEMU_ESIGRETURN)) { /* Returning from a successful sigreturn syscall. Avoid corrupting register state. */ @@ -2505,6 +2540,10 @@ done_syscall: env->active_tc.gpr[8], env->active_tc.gpr[9], env->active_tc.gpr[10], env->active_tc.gpr[11]); # endif /* O32 */ + if (ret == -TARGET_ERESTARTSYS) { + env->active_tc.PC -= 4; + break; + } if (ret == -TARGET_QEMU_ESIGRETURN) { /* Returning from a successful sigreturn syscall. Avoid clobbering register state. */ @@ -2685,6 +2724,7 @@ void cpu_loop(CPUOpenRISCState *env) { CPUState *cs = CPU(openrisc_env_get_cpu(env)); int trapnr, gdbsig; + abi_long ret; for (;;) { cpu_exec_start(cs); @@ -2730,14 +2770,19 @@ void cpu_loop(CPUOpenRISCState *env) break; case EXCP_SYSCALL: env->pc += 4; /* 0xc00; */ - env->gpr[11] = do_syscall(env, - env->gpr[11], /* return value */ - env->gpr[3], /* r3 - r7 are params */ - env->gpr[4], - env->gpr[5], - env->gpr[6], - env->gpr[7], - env->gpr[8], 0, 0); + ret = do_syscall(env, + env->gpr[11], /* return value */ + env->gpr[3], /* r3 - r7 are params */ + env->gpr[4], + env->gpr[5], + env->gpr[6], + env->gpr[7], + env->gpr[8], 0, 0); + if (ret == -TARGET_ERESTARTSYS) { + env->pc -= 4; + } else if (ret != -TARGET_QEMU_ESIGRETURN) { + env->gpr[11] = ret; + } break; case EXCP_FPE: qemu_log_mask(CPU_LOG_INT, "\nFloating point error\n"); @@ -2792,7 +2837,11 @@ void cpu_loop(CPUSH4State *env) env->gregs[0], env->gregs[1], 0, 0); - env->gregs[0] = ret; + if (ret == -TARGET_ERESTARTSYS) { + env->pc -= 2; + } else if (ret != -TARGET_QEMU_ESIGRETURN) { + env->gregs[0] = ret; + } break; case EXCP_INTERRUPT: /* just indicate that signals should be handled asap */ @@ -2865,7 +2914,11 @@ void cpu_loop(CPUCRISState *env) env->pregs[7], env->pregs[11], 0, 0); - env->regs[10] = ret; + if (ret == -TARGET_ERESTARTSYS) { + env->pc -= 2; + } else if (ret != -TARGET_QEMU_ESIGRETURN) { + env->regs[10] = ret; + } break; case EXCP_DEBUG: { @@ -2929,7 +2982,19 @@ void cpu_loop(CPUMBState *env) env->regs[9], env->regs[10], 0, 0); - env->regs[3] = ret; + if (ret == -TARGET_ERESTARTSYS) { + /* Wind back to before the syscall. */ + env->sregs[SR_PC] -= 4; + } else if (ret != -TARGET_QEMU_ESIGRETURN) { + env->regs[3] = ret; + } + /* All syscall exits result in guest r14 being equal to the + * PC we return to, because the kernel syscall exit "rtbd" does + * this. (This is true even for sigreturn(); note that r14 is + * not a userspace-usable register, as the kernel may clobber it + * at any point.) + */ + env->regs[14] = env->sregs[SR_PC]; break; case EXCP_HW_EXCP: env->regs[17] = env->sregs[SR_PC] + 4; @@ -3037,18 +3102,24 @@ void cpu_loop(CPUM68KState *env) break; case EXCP_TRAP0: { + abi_long ret; ts->sim_syscalls = 0; n = env->dregs[0]; env->pc += 2; - env->dregs[0] = do_syscall(env, - n, - env->dregs[1], - env->dregs[2], - env->dregs[3], - env->dregs[4], - env->dregs[5], - env->aregs[0], - 0, 0); + ret = do_syscall(env, + n, + env->dregs[1], + env->dregs[2], + env->dregs[3], + env->dregs[4], + env->dregs[5], + env->aregs[0], + 0, 0); + if (ret == -TARGET_ERESTARTSYS) { + env->pc -= 2; + } else if (ret != -TARGET_QEMU_ESIGRETURN) { + env->dregs[0] = ret; + } } break; case EXCP_INTERRUPT: @@ -3229,8 +3300,11 @@ void cpu_loop(CPUAlphaState *env) env->ir[IR_A2], env->ir[IR_A3], env->ir[IR_A4], env->ir[IR_A5], 0, 0); - if (trapnr == TARGET_NR_sigreturn - || trapnr == TARGET_NR_rt_sigreturn) { + if (sysret == -TARGET_ERESTARTSYS) { + env->pc -= 4; + break; + } + if (sysret == -TARGET_QEMU_ESIGRETURN) { break; } /* Syscall writes 0 to V0 to bypass error check, similar @@ -3327,6 +3401,7 @@ void cpu_loop(CPUS390XState *env) int trapnr, n, sig; target_siginfo_t info; target_ulong addr; + abi_long ret; while (1) { cpu_exec_start(cs); @@ -3344,9 +3419,14 @@ void cpu_loop(CPUS390XState *env) n = env->regs[1]; } env->psw.addr += env->int_svc_ilen; - env->regs[2] = do_syscall(env, n, env->regs[2], env->regs[3], - env->regs[4], env->regs[5], - env->regs[6], env->regs[7], 0, 0); + ret = do_syscall(env, n, env->regs[2], env->regs[3], + env->regs[4], env->regs[5], + env->regs[6], env->regs[7], 0, 0); + if (ret == -TARGET_ERESTARTSYS) { + env->psw.addr -= env->int_svc_ilen; + } else if (ret != -TARGET_QEMU_ESIGRETURN) { + env->regs[2] = ret; + } break; case EXCP_DEBUG: @@ -3638,15 +3718,20 @@ void cpu_loop(CPUTLGState *env) cpu_exec_end(cs); switch (trapnr) { case TILEGX_EXCP_SYSCALL: - env->regs[TILEGX_R_RE] = do_syscall(env, env->regs[TILEGX_R_NR], - env->regs[0], env->regs[1], - env->regs[2], env->regs[3], - env->regs[4], env->regs[5], - env->regs[6], env->regs[7]); - env->regs[TILEGX_R_ERR] = TILEGX_IS_ERRNO(env->regs[TILEGX_R_RE]) - ? - env->regs[TILEGX_R_RE] - : 0; + { + abi_ulong ret = do_syscall(env, env->regs[TILEGX_R_NR], + env->regs[0], env->regs[1], + env->regs[2], env->regs[3], + env->regs[4], env->regs[5], + env->regs[6], env->regs[7]); + if (ret == -TARGET_ERESTARTSYS) { + env->pc -= 8; + } else if (ret != -TARGET_QEMU_ESIGRETURN) { + env->regs[TILEGX_R_RE] = ret; + env->regs[TILEGX_R_ERR] = TILEGX_IS_ERRNO(ret) ? -ret : 0; + } break; + } case TILEGX_EXCP_OPCODE_EXCH: do_exch(env, true, false); break; |