diff mbox series

[PULL,02/14] linux-user/mips: fix abort on integer overflow

Message ID 20231018233134.1594292-3-richard.henderson@linaro.org
State Accepted
Commit 6fad9b4bb91dcc824f9c00a36ee843883b58313b
Headers show
Series [PULL,01/14] linux-user: Fixes for zero_bss | expand

Commit Message

Richard Henderson Oct. 18, 2023, 11:31 p.m. UTC 
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 mbox series

Patch

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.
          */