diff options
| author | Josh Poimboeuf <[email protected]> | 2016-10-20 11:34:45 -0500 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2016-10-21 09:26:05 +0200 |
| commit | 6fa81a12b3f1834a22167aa2d7b24dcc4bf884e3 (patch) | |
| tree | 78ef1e8004edcc18a989979d98dc774f05150ff6 /scripts/gcc-plugins/cyc_complexity_plugin.c | |
| parent | 1141c3e39c64e4aba2d98cb3dcca95369c9dafbe (diff) | |
x86/dumpstack: Print orig_ax in __show_regs()
The value of regs->orig_ax contains potentially useful debugging data:
For syscalls it contains the syscall number. For interrupts it contains
the (negated) vector number. To reduce noise, print it only if it has a
useful value (i.e., something other than -1).
Here's what it looks like for a write syscall:
RIP: 0033:[<00007f53ad7b1940>] 0x7f53ad7b1940
RSP: 002b:00007fff8de66558 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000046 RCX: 00007f53ad7b1940
RDX: 0000000000000002 RSI: 00007f53ae0ca000 RDI: 0000000000000001
...
Suggested-by: Andy Lutomirski <[email protected]>
Signed-off-by: Josh Poimboeuf <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/93f0fe0307a4af884d3fca00edabcc8cff236002.1476973742.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <[email protected]>
Diffstat (limited to 'scripts/gcc-plugins/cyc_complexity_plugin.c')
0 files changed, 0 insertions, 0 deletions