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authorOleg Nesterov <oleg@redhat.com>2012-08-08 18:07:03 +0200
committerOleg Nesterov <oleg@redhat.com>2012-08-28 18:21:20 +0200
commitded86e7c8fc4404414c4700010c9962ea8bd083a (patch)
tree39528d3fd485701e239fed27e2f646c5fd0d53d5 /kernel/events
parent61559a8165da2b6bab7621ac36379c6280efacb6 (diff)
downloadlinux-ded86e7c8fc4404414c4700010c9962ea8bd083a.tar.bz2
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 'kernel/events')
-rw-r--r--kernel/events/uprobes.c20
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);
}
/*