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| author |   Roland McGrath <roland@redhat.com> | 2007-09-24 16:52:44 -0700 |
|---|---|---|
| committer |   Paul Mackerras <paulus@samba.org> | 2007-09-25 20:40:41 +1000 |
| commit | 474f81967217f3bec2389ae913da72641f2c40e3 (patch) | |
| tree | 8c9e16b05eeb0f56c49dcf61b145732569010ec8 /arch/powerpc/platforms/cell/spufs/file.c | |
| parent | Linux 2.6.23-rc8 (diff) | |
| download | linux-dev-474f81967217f3bec2389ae913da72641f2c40e3.tar.xz linux-dev-474f81967217f3bec2389ae913da72641f2c40e3.zip | |
[POWERPC] Ensure FULL_REGS on exec
When PTRACE_O_TRACEEXEC is used, a ptrace call to fetch the registers at
the PTRACE_EVENT_EXEC stop (PTRACE_PEEKUSR) will oops in CHECK_FULL_REGS.
With recent versions, "gdb --args /bin/sh -c 'exec /bin/true'" and "run" at
the (gdb) prompt is sufficient to produce this. I also have written an
isolated test case, see https://bugzilla.redhat.com/show_bug.cgi?id=301791#c15.
This change fixes the problem by clearing the low bit of pt_regs.trap in
start_thread so that FULL_REGS is true again. This is correct since all of
the GPRs that "full" refers to are cleared in start_thread.
Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions