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-rw-r--r--linux-user/main.c225
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;
generated by cgit v1.2.3 (git 2.26.2) at 2025-03-20 09:46:50 +0000