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[PULL 02/14] linux-user/mips: fix abort on integer overflow
From: |
Richard Henderson |
Subject: |
[PULL 02/14] linux-user/mips: fix abort on integer overflow |
Date: |
Wed, 18 Oct 2023 16:31:22 -0700 |
From: Mikulas Patocka <mpatocka@redhat.com>
QEMU mips userspace emulation crashes with "qemu: unhandled CPU exception
0x15 - aborting" when one of the integer arithmetic instructions detects
an overflow.
This patch fixes it so that it delivers SIGFPE with FPE_INTOVF instead.
Cc: qemu-stable@nongnu.org
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Message-Id: <3ef979a8-3ee1-eb2d-71f7-d788ff88dd11@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
linux-user/mips/cpu_loop.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/linux-user/mips/cpu_loop.c b/linux-user/mips/cpu_loop.c
index 8735e58bad..990b03e727 100644
--- a/linux-user/mips/cpu_loop.c
+++ b/linux-user/mips/cpu_loop.c
@@ -180,7 +180,9 @@ done_syscall:
}
force_sig_fault(TARGET_SIGFPE, si_code, env->active_tc.PC);
break;
-
+ case EXCP_OVERFLOW:
+ force_sig_fault(TARGET_SIGFPE, TARGET_FPE_INTOVF,
env->active_tc.PC);
+ break;
/* The code below was inspired by the MIPS Linux kernel trap
* handling code in arch/mips/kernel/traps.c.
*/
--
2.34.1
- [PULL 00/14] linux-user patch queue, Richard Henderson, 2023/10/18
- [PULL 01/14] linux-user: Fixes for zero_bss, Richard Henderson, 2023/10/18
- [PULL 02/14] linux-user/mips: fix abort on integer overflow,
Richard Henderson <=
- [PULL 03/14] linux-user/sh4: Fix crashes on signal delivery, Richard Henderson, 2023/10/18
- [PULL 04/14] linux-user/elfload: Enable LSX/LASX in HWCAP for LoongArch, Richard Henderson, 2023/10/18
- [PULL 07/14] linux-user: Exit not abort in die_with_backtrace, Richard Henderson, 2023/10/18
- [PULL 08/14] linux-user: Detect and report host crashes, Richard Henderson, 2023/10/18
- [PULL 09/14] linux-user: Only register handlers for core_dump_signal by default, Richard Henderson, 2023/10/18
- [PULL 05/14] linux-user: Propagate failure in mmap_reserve_or_unmap back to target_munmap, Richard Henderson, 2023/10/18
- [PULL 06/14] linux-user: Split out die_with_signal, Richard Henderson, 2023/10/18
- [PULL 10/14] linux-user: Map unsupported signals to an out-of-bounds value, Richard Henderson, 2023/10/18
- [PULL 11/14] linux-user: Simplify signal_init, Richard Henderson, 2023/10/18
- [PULL 13/14] linux-user: Detect and report host SIGILL, SIGFPE, SIGTRAP, Richard Henderson, 2023/10/18