On Wed, Dec 27, 2017 at 07:53:50PM +0100, Martin Husemann wrote:
> I must be missing something, or the test works on alpha and x86 due to a
> bug, but correctly fails on other architectures.
The same difference can be seen very simply by running the attached
program under gdb:
(gdb) run
Starting program: /tmp/a.out
hello, before break
Program received signal SIGTRAP, Trace/breakpoint trap.
0x000000000040087f in main ()
(gdb) c
Continuing.
and after...
[Inferior 1 (process 3001) exited normally]
But on sparc* instead you see it hit the same breakpoint instruction
again after continuing. The interpretation of (void*)1 for new %pc
value must be different.
>From our man page, I'd claim x86 is wrong and sparc* is right.
Martin
#include <stdio.h>
#include <sys/types.h>
#include <sys/ptrace.h>
int main(void)
{
printf("hello, before break\n");
PTRACE_BREAKPOINT_ASM;
printf("and after...\n");
return 0;
}
