diff options
| author | Mark Kettenis <kettenis@gnu.org> | 2004-02-08 21:25:41 +0000 |
|---|---|---|
| committer | Mark Kettenis <kettenis@gnu.org> | 2004-02-08 21:25:41 +0000 |
| commit | 645d6d1047e8b9ae859f8cd295569bfc4d4ffcdf (patch) | |
| tree | 10b747b96d666f77254997ee5028d0feeb3c463d /gdb/sparc-nat.c | |
| parent | 58dfe9ff598452395a21b5f886ac38eba9b44ebb (diff) | |
* sparc-nat.c (sparc_xfer_wcookie): Try to fetch the cookie using
the PT_WCOOKIE request.
Diffstat (limited to 'gdb/sparc-nat.c')
| -rw-r--r-- | gdb/sparc-nat.c | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/gdb/sparc-nat.c b/gdb/sparc-nat.c index 477fc975b7..955e65e314 100644 --- a/gdb/sparc-nat.c +++ b/gdb/sparc-nat.c @@ -270,8 +270,32 @@ sparc_xfer_wcookie (struct target_ops *ops, enum target_object object, /* If PT_WCOOKIE is defined (by <sys/ptrace.h>), assume we're running on an OpenBSD release that uses StackGhost (3.1 or later). As of release 3.4, OpenBSD doesn't use a randomized - cookie yet. */ - wcookie = 0x3; + cookie yet, but a future release probably will. */ + { + int pid; + + pid = TIDGET (inferior_ptid); + if (pid == 0) + pid = PIDGET (inferior_ptid); + + /* Sanity check. The proper type for a cookie is register_t, but + we can't assume that this type exists on all systems supported + by the code in this file. */ + gdb_assert (sizeof (wcookie) == sizeof (register_t)); + + /* Fetch the cookie. */ + if (ptrace (PT_WCOOKIE, pid, (PTRACE_ARG3_TYPE) &wcookie, 0) == -1) + { + if (errno != EINVAL) + perror_with_name ("Couldn't get StackGhost cookie"); + + /* Although PT_WCOOKIE is defined on OpenBSD 3.1 and later, + the request wasn't implemented until after OpenBSD 3.4. If + the kernel doesn't support the PT_WCOOKIE request, assume + we're running on a kernel that uses non-randomized cookies. */ + wcookie = 0x3; + } + } #endif /* PT_WCOOKIE */ if (len > sizeof (unsigned long) - offset) |