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Kprobes might be stealing int3
- From: Keshavamurthy Anil S <anil dot s dot keshavamurthy at intel dot com>
- To: Systemtap <systemtap at sources dot redhat dot com>
- Cc: anil dot s dot keshavamurthy at intel dot com
- Date: Thu, 23 Feb 2006 12:10:41 -0800
- Subject: Kprobes might be stealing int3
- Reply-to: Keshavamurthy Anil S <anil dot s dot keshavamurthy at intel dot com>
Hi,
I tried running the below program on both
x86_64 and i386 and on both architecture,
if the kernel is compiled with CONFIG_KPROBES,
my below application segmentation faults.
On kernel where CONFIG_KPROBES set to N, the
same test program passes.
Here goes the test program...
-------------------------
#include <stdlib.h>
#include <signal.h>
void my_trap(int sig)
{
printf("Test passed, all OK\n");
exit(0);
}
int main()
{
signal(SIGTRAP, my_trap);
asm volatile (".byte 0xcd,3");
printf("Stolen interrupt, very bad!\n");
}
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