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| author |   bibo,mao <bibo.mao@intel.com> | 2007-01-31 17:50:31 +0800 |
|---|---|---|
| committer |   Tony Luck <tony.luck@intel.com> | 2007-02-05 13:49:29 -0800 |
| commit | 90f9d70a582c02f50b4dd847166cd5b037219891 (patch) | |
| tree | ffe6b5246f9e2334b474ca0913776668803d1ea0 /arch/ia64/kernel/setup.c | |
| parent | [IA64] kexec: Move machine_shutdown from machine_kexec.c to process.c (diff) | |
| download | linux-dev-90f9d70a582c02f50b4dd847166cd5b037219891.tar.xz linux-dev-90f9d70a582c02f50b4dd847166cd5b037219891.zip | |
[IA64] enable singlestep on system call
As is pointed out in
http://www.gelato.org/community/view_linear.php?id=1_1036&from=authors&value=Ian%20Wienand#1_1039,
if single step on break instruction, the break fault has higher
priority than the single-step trap. When the break fault handler
is entered, it advances the IP by 1 instruction so break instruction
single-stepping is skipped, actually it is next instruction which
is single stepped.
This patch modifies this, it adds TIF_SINGLESTEP bit for thread
flags, and generate a fake sigtrap when single stepping break
instruction. Test case in attachment can verify this. Any comments
is welcome.
Signed-off-by: bibo, mao <bibo.mao@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/kernel/setup.c')
0 files changed, 0 insertions, 0 deletions