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| author | Oleg Nesterov <oleg@redhat.com> | 2012-08-08 18:07:03 +0200 |
|---|---|---|
| committer | Oleg Nesterov <oleg@redhat.com> | 2012-08-28 18:21:20 +0200 |
| commit | ded86e7c8fc4404414c4700010c9962ea8bd083a (patch) | |
| tree | 39528d3fd485701e239fed27e2f646c5fd0d53d5 /kernel/events/uprobes.c | |
| parent | uprobes: Fold uprobe_reset_state() into uprobe_dup_mmap() (diff) | |
| download | linux-ded86e7c8fc4404414c4700010c9962ea8bd083a.tar.xz linux-ded86e7c8fc4404414c4700010c9962ea8bd083a.zip | |
uprobes: Remove "verify" argument from set_orig_insn()
Nobody does set_orig_insn(verify => false), and I think nobody will.
Remove this argument. IIUC set_orig_insn(verify => false) was needed
to single-step without xol area.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Diffstat (limited to '')
| -rw-r--r-- | kernel/events/uprobes.c | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c index 610e1c8050cf..1666632e6edf 100644 --- a/kernel/events/uprobes.c +++ b/kernel/events/uprobes.c @@ -345,24 +345,22 @@ int __weak set_swbp(struct arch_uprobe *auprobe, struct mm_struct *mm, unsigned * @mm: the probed process address space. * @auprobe: arch specific probepoint information. * @vaddr: the virtual address to insert the opcode. - * @verify: if true, verify existance of breakpoint instruction. * * For mm @mm, restore the original opcode (opcode) at @vaddr. * Return 0 (success) or a negative errno. */ int __weak -set_orig_insn(struct arch_uprobe *auprobe, struct mm_struct *mm, unsigned long vaddr, bool verify) +set_orig_insn(struct arch_uprobe *auprobe, struct mm_struct *mm, unsigned long vaddr) { - if (verify) { - int result; + int result; + + result = is_swbp_at_addr(mm, vaddr); + if (!result) + return -EINVAL; - result = is_swbp_at_addr(mm, vaddr); - if (!result) - return -EINVAL; + if (result != 1) + return result; - if (result != 1) - return result; - } return write_opcode(auprobe, mm, vaddr, *(uprobe_opcode_t *)auprobe->insn); } @@ -697,7 +695,7 @@ install_breakpoint(struct uprobe *uprobe, struct mm_struct *mm, static void remove_breakpoint(struct uprobe *uprobe, struct mm_struct *mm, unsigned long vaddr) { - set_orig_insn(&uprobe->arch, mm, vaddr, true); + set_orig_insn(&uprobe->arch, mm, vaddr); } /* |