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authorChristian Krinitsin <mail@krinitsin.com>2025-07-06 16:43:19 +0000
committerChristian Krinitsin <mail@krinitsin.com>2025-07-06 16:43:19 +0000
commit238ec2b7cc1557d6f34c33cc482e4d0cd3e266dd (patch)
treecd8a1b75ba7b3543eb7fe6857f408e7be4d9fd0b /results/classifier/gemma3:27b/instruction/2078
parent96049c939b1916d80532630d63c14e04d5244f1d (diff)
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+
+
+Qemu crashes with SIGFPE on certain trapping arithmetic operations on m68k target
+Description of problem:
+I recently ported NetBSD to the Qemu m68k "virt" platform, and this was discovered when running NetBSD's automated tests.  Certain arithmetic operation that will trap in the guest will crash Qemu.  First case encountered is below.
+Steps to reproduce:
+1. Compile and run the following program in the m68k guest:
+
+```
+virt68k:thorpej 3$ cat crash-qemu.c                                            
+#include <limits.h>
+#include <stdlib.h>
+
+int divisor = -1;
+
+int
+main(int argc, char *argv[])
+{
+
+	if (argc > 1)
+		divisor = atoi(argv[1]);
+
+	return INT_MIN / divisor;
+}
+virt68k:thorpej 4$ 
+```
+
+Another minimal case would be:
+
+```
+move.l #-2147483648,%d0
+move.l #-1,%d1
+divsl.l %d1,%d1:%d0
+```
+Additional information:
+