[Stable-8.1.3 12/55] linux-user/mips: fix abort on integer overflow

[Michael Tokarev]

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>
(cherry picked from commit 6fad9b4bb91dcc824f9c00a36ee843883b58313b)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

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.
          */
-- 
2.39.2