diff options
Diffstat (limited to 'results/classifier/accel-gemma3:12b/tcg/2333')
| -rw-r--r-- | results/classifier/accel-gemma3:12b/tcg/2333 | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/results/classifier/accel-gemma3:12b/tcg/2333 b/results/classifier/accel-gemma3:12b/tcg/2333 new file mode 100644 index 000000000..765c54a3b --- /dev/null +++ b/results/classifier/accel-gemma3:12b/tcg/2333 @@ -0,0 +1,46 @@ + +VDSO on armeb seems broken +Description of problem: +I'm seeing the VDSO method for `__clock_gettime64()` crashing under `qemu-armeb` (stack trace under Additional information, below). + +I rebuilt glibc with VDSO globally kludged off, and all was well. +Steps to reproduce: +``` +#include <time.h> +#include <stdlib.h> +#include <stdio.h> + +int main(int argc, char **argv) { + time_t ts; + printf("%ld\n", time(&ts)); + exit(0); +} +``` + +Results, first with VDSO active via a system snapshot, second with the patched glibc: +``` +$ armeb-linux-gnueabihf-gcc -o /tmp/time /tmp/time.c +$ qemu-armeb -L /.mirrorsnaps/.rootsnap.prev/usr/armeb-linux-gnueabihf /tmp/time +qemu: uncaught target signal 11 (Segmentation fault) - core dumped +Segmentation fault +$ qemu-armeb -L /usr/armeb-linux-gnueabihf /tmp/time +1715123280 +``` +Additional information: +``` +Program received signal SIGSEGV, Segmentation fault. +0x4082b462 in ?? () +(gdb) bt +#0 0x4082b462 in ?? () +#1 0x40bf64a4 in __GI___clock_gettime64 (clock_id=clock_id@entry=5, tp=tp@entry=0x407fe9c0) + at ../sysdeps/unix/sysv/linux/clock_gettime.c:42 +#2 0x40be9f58 in __GI___time64 (timer=0x0) at ../sysdeps/unix/sysv/linux/time.c:60 +#3 __time (timer=0x407fea04) at ../sysdeps/unix/sysv/linux/time.c:73 +``` + +`clock_gettime.c:42` is +``` + r = INTERNAL_VSYSCALL_CALL (vdso_time64, 2, clock_id, tp); +``` + +Interestingly, the problem doesn't occur on qemu-arm (little endian), all else equal. |