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authorChristian Krinitsin <mail@krinitsin.com>2025-07-03 19:39:53 +0200
committerChristian Krinitsin <mail@krinitsin.com>2025-07-03 19:39:53 +0200
commitdee4dcba78baf712cab403d47d9db319ab7f95d6 (patch)
tree418478faf06786701a56268672f73d6b0b4eb239 /results/classifier/zero-shot/108/device/837
parent4d9e26c0333abd39bdbd039dcdb30ed429c475ba (diff)
downloademulator-bug-study-dee4dcba78baf712cab403d47d9db319ab7f95d6.tar.gz
emulator-bug-study-dee4dcba78baf712cab403d47d9db319ab7f95d6.zip
restructure results
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diff --git a/results/classifier/zero-shot/108/device/837 b/results/classifier/zero-shot/108/device/837
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+device: 0.946
+performance: 0.931
+graphic: 0.919
+files: 0.864
+debug: 0.815
+semantic: 0.776
+PID: 0.758
+permissions: 0.728
+network: 0.707
+boot: 0.693
+vnc: 0.638
+socket: 0.595
+other: 0.481
+KVM: 0.074
+
+x86 user: icebp/int1 raises wrong signal
+Description of problem:
+This is a relatively minor inaccuracy. When `icebp` (`F1`) is executed, it raises `SIGILL` in QEMU, where the behavior on baremetal Linux (on an old Intel Core i5-430m) is to raise `SIGTRAP`.
+
+Specifically, on the architectural level, `icebp` raises `#DB` without affecting `dr6`.
+
+This also happens on an AArch64 host.
+```
+$ ./icebp
+Trace/breakpoint trap
+$ qemu-x86_64 ./icebp
+qemu: uncaught target signal 4 (Illegal instruction) - core dumped
+Illegal instruction
+```
+Steps to reproduce:
+1. Compile this file using `gcc -nostdlib -static icebp.S -o icebp`, optionally with `-m32` to test i386
+```
+    .globl _start
+_start:
+    .byte  0xF1 // gas doesn't assemble this instruction opcode but it disassembles it
+#ifdef __x86_64__
+    mov    $60, %eax
+    syscall
+#else
+    mov    $1, %eax
+    int    $0x80
+#endif 
+```
+2. Run on baremetal. Notice how it raises `SIGTRAP` according to the shell job control message
+3. Run on qemu-user. Notice how it raises `SIGILL`.