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[PULL 6/7] linux-user/arm: Use force_sig_fault()
From: |
Laurent Vivier |
Subject: |
[PULL 6/7] linux-user/arm: Use force_sig_fault() |
Date: |
Fri, 24 Sep 2021 15:56:30 +0200 |
From: Peter Maydell <peter.maydell@linaro.org>
Use the new force_sig_fault() function instead of setting up
a target_siginfo_t and calling queue_signal().
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210813131809.28655-7-peter.maydell@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
---
linux-user/arm/cpu_loop.c | 53 +++++++++++----------------------------
1 file changed, 15 insertions(+), 38 deletions(-)
diff --git a/linux-user/arm/cpu_loop.c b/linux-user/arm/cpu_loop.c
index fb78a1aab308..ae09adcb9501 100644
--- a/linux-user/arm/cpu_loop.c
+++ b/linux-user/arm/cpu_loop.c
@@ -94,7 +94,6 @@ static void arm_kernel_cmpxchg64_helper(CPUARMState *env)
{
uint64_t oldval, newval, val;
uint32_t addr, cpsr;
- target_siginfo_t info;
/* Based on the 32 bit code in do_kernel_trap */
@@ -143,12 +142,9 @@ segv:
end_exclusive();
/* We get the PC of the entry address - which is as good as anything,
on a real kernel what you get depends on which mode it uses. */
- info.si_signo = TARGET_SIGSEGV;
- info.si_errno = 0;
/* XXX: check env->error_code */
- info.si_code = TARGET_SEGV_MAPERR;
- info._sifields._sigfault._addr = env->exception.vaddress;
- queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
+ force_sig_fault(TARGET_SIGSEGV, TARGET_SEGV_MAPERR,
+ env->exception.vaddress);
}
/* Handle a jump to the kernel code page. */
@@ -286,8 +282,6 @@ void cpu_loop(CPUARMState *env)
CPUState *cs = env_cpu(env);
int trapnr;
unsigned int n, insn;
- target_siginfo_t info;
- uint32_t addr;
abi_ulong ret;
for(;;) {
@@ -322,11 +316,8 @@ void cpu_loop(CPUARMState *env)
break;
}
- info.si_signo = TARGET_SIGILL;
- info.si_errno = 0;
- info.si_code = TARGET_ILL_ILLOPN;
- info._sifields._sigfault._addr = env->regs[15];
- queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
+ force_sig_fault(TARGET_SIGILL, TARGET_ILL_ILLOPN,
+ env->regs[15]);
}
break;
case EXCP_SWI:
@@ -394,18 +385,14 @@ void cpu_loop(CPUARMState *env)
* Otherwise SIGILL. This includes any SWI with
* immediate not originally 0x9fxxxx, because
* of the earlier XOR.
+ * Like the real kernel, we report the addr of the
+ * SWI in the siginfo si_addr but leave the PC
+ * pointing at the insn after the SWI.
*/
- info.si_signo = TARGET_SIGILL;
- info.si_errno = 0;
- info.si_code = TARGET_ILL_ILLTRP;
- info._sifields._sigfault._addr = env->regs[15];
- if (env->thumb) {
- info._sifields._sigfault._addr -= 2;
- } else {
- info._sifields._sigfault._addr -= 4;
- }
- queue_signal(env, info.si_signo,
- QEMU_SI_FAULT, &info);
+ abi_ulong faultaddr = env->regs[15];
+ faultaddr -= env->thumb ? 2 : 4;
+ force_sig_fault(TARGET_SIGILL, TARGET_ILL_ILLTRP,
+ faultaddr);
}
break;
}
@@ -436,24 +423,14 @@ void cpu_loop(CPUARMState *env)
break;
case EXCP_PREFETCH_ABORT:
case EXCP_DATA_ABORT:
- addr = env->exception.vaddress;
- {
- info.si_signo = TARGET_SIGSEGV;
- info.si_errno = 0;
- /* XXX: check env->error_code */
- info.si_code = TARGET_SEGV_MAPERR;
- info._sifields._sigfault._addr = addr;
- queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
- }
+ /* XXX: check env->error_code */
+ force_sig_fault(TARGET_SIGSEGV, TARGET_SEGV_MAPERR,
+ env->exception.vaddress);
break;
case EXCP_DEBUG:
case EXCP_BKPT:
excp_debug:
- info.si_signo = TARGET_SIGTRAP;
- info.si_errno = 0;
- info.si_code = TARGET_TRAP_BRKPT;
- info._sifields._sigfault._addr = env->regs[15];
- queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
+ force_sig_fault(TARGET_SIGTRAP, TARGET_TRAP_BRKPT, env->regs[15]);
break;
case EXCP_KERNEL_TRAP:
if (do_kernel_trap(env))
--
2.31.1
- [PULL 0/7] Linux user for 6.2 patches, Laurent Vivier, 2021/09/24
- [PULL 1/7] linux-user/aarch64: Set siginfo_t addr field for SIGTRAP signals, Laurent Vivier, 2021/09/24
- [PULL 3/7] linux-user/arm: Use force_sig() to deliver fpa11 emulation SIGFPE, Laurent Vivier, 2021/09/24
- [PULL 4/7] linux-user: Zero out target_siginfo_t in force_sig(), Laurent Vivier, 2021/09/24
- [PULL 2/7] linux-user/arm: Set siginfo_t addr field for SIGTRAP signals, Laurent Vivier, 2021/09/24
- [PULL 5/7] linux-user: Provide new force_sig_fault() function, Laurent Vivier, 2021/09/24
- [PULL 7/7] linux-user/aarch64: Use force_sig_fault(), Laurent Vivier, 2021/09/24
- [PULL 6/7] linux-user/arm: Use force_sig_fault(),
Laurent Vivier <=
- Re: [PULL 0/7] Linux user for 6.2 patches, Peter Maydell, 2021/09/24