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| author | Christoph Hellwig <hch@lst.de> | 2007-05-08 00:34:14 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-08 11:15:19 -0700 |
| commit | 4c4308cb93450989846ac49faeb6dab943e7657e (patch) | |
| tree | c06092cae6f95a243cdd758d07491cf5fa24a1dd /arch/x86_64 | |
| parent | 6f716acd5fa20ae6a35ab29ae37fa9189e839ed5 (diff) | |
| download | linux-3.10-4c4308cb93450989846ac49faeb6dab943e7657e.tar.gz linux-3.10-4c4308cb93450989846ac49faeb6dab943e7657e.tar.bz2 linux-3.10-4c4308cb93450989846ac49faeb6dab943e7657e.zip | |
kprobes: kretprobes simplifications
- consolidate duplicate code in all arch_prepare_kretprobe instances
into common code
- replace various odd helpers that use hlist_for_each_entry to get
the first elemenet of a list with either a hlist_for_each_entry_save
or an opencoded access to the first element in the caller
- inline add_rp_inst into it's only remaining caller
- use kretprobe_inst_table_head instead of opencoding it
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com>
Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86_64')
| -rw-r--r-- | arch/x86_64/kernel/kprobes.c | 17 |
1 files changed, 4 insertions, 13 deletions
diff --git a/arch/x86_64/kernel/kprobes.c b/arch/x86_64/kernel/kprobes.c index 5841ba5f479..f995bea6e2c 100644 --- a/arch/x86_64/kernel/kprobes.c +++ b/arch/x86_64/kernel/kprobes.c @@ -266,23 +266,14 @@ static void __kprobes prepare_singlestep(struct kprobe *p, struct pt_regs *regs) } /* Called with kretprobe_lock held */ -void __kprobes arch_prepare_kretprobe(struct kretprobe *rp, +void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri, struct pt_regs *regs) { unsigned long *sara = (unsigned long *)regs->rsp; - struct kretprobe_instance *ri; - if ((ri = get_free_rp_inst(rp)) != NULL) { - ri->rp = rp; - ri->task = current; - ri->ret_addr = (kprobe_opcode_t *) *sara; - - /* Replace the return addr with trampoline addr */ - *sara = (unsigned long) &kretprobe_trampoline; - add_rp_inst(ri); - } else { - rp->nmissed++; - } + ri->ret_addr = (kprobe_opcode_t *) *sara; + /* Replace the return addr with trampoline addr */ + *sara = (unsigned long) &kretprobe_trampoline; } int __kprobes kprobe_handler(struct pt_regs *regs) |