From ea3c95a6b0afae799a34458b819e9a30b9ca6817 Mon Sep 17 00:00:00 2001 From: Mikulas Patocka Date: Thu, 28 Sep 2023 21:55:20 +0200 Subject: [PATCH] linux-user/mips: fix abort on integer overflow 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 Message-Id: <3ef979a8-3ee1-eb2d-71f7-d788ff88dd11@redhat.com> Reviewed-by: Richard Henderson Signed-off-by: Richard Henderson (cherry picked from commit 6fad9b4bb91dcc824f9c00a36ee843883b58313b) Signed-off-by: Michael Tokarev --- 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. */