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| author | Roland McGrath <roland@redhat.com> | 2008-07-09 01:07:02 -0700 |
|---|---|---|
| committer | Roland McGrath <roland@redhat.com> | 2008-07-16 12:15:16 -0700 |
| commit | 6718d0d6da2749d3bff522e6057e97e6aa85e4d1 (patch) | |
| tree | a069a92fd5011eb32bc461f3a23f0fc32d72f8ec /arch/x86/kernel/amd_iommu_init.c | |
| parent | a3cf859321486f69506326146ab3e2fd15c05c3f (diff) | |
x86 ptrace: block-step fix
The enable_single_step() logic bails out early if TF is already set.
That skips some of the bookkeeping that keeps things straight.
This makes PTRACE_SINGLEBLOCK break the behavior of a user task
that was already setting TF itself in user mode.
Fix the bookkeeping to notice the old TF setting as it should.
Test case at: http://sources.redhat.com/cgi-bin/cvsweb.cgi/~checkout~/tests/ptrace-tests/tests/step-jump-cont-strict.c?cvsroot=systemtap
Signed-off-by: Roland McGrath <roland@redhat.com>
Diffstat (limited to 'arch/x86/kernel/amd_iommu_init.c')
0 files changed, 0 insertions, 0 deletions