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linux-user/mips: fix abort on integer overflow

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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>
(cherry picked from commit 6fad9b4bb9)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This commit is contained in:
Mikulas Patocka 2023-09-28 21:55:20 +02:00 committed by Michael Tokarev
parent f5358bc18b
commit ea3c95a6b0
1 changed files with 3 additions and 1 deletions
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4
linux-user/mips/cpu_loop.c
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@ -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.
*/