kprobes.c (9f90b997de4efd5404a8c52f89c400f0f4e2d216) kprobes.c (1eeb66a1bb973534dc3d064920a5ca683823372e)
1/*
2 * Kernel Probes (KProbes)
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *

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25 * 2004-Nov Ananth N Mavinakayanahalli <ananth@in.ibm.com> kprobes port
26 * for PPC64
27 */
28
29#include <linux/kprobes.h>
30#include <linux/ptrace.h>
31#include <linux/preempt.h>
32#include <linux/module.h>
1/*
2 * Kernel Probes (KProbes)
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *

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25 * 2004-Nov Ananth N Mavinakayanahalli <ananth@in.ibm.com> kprobes port
26 * for PPC64
27 */
28
29#include <linux/kprobes.h>
30#include <linux/ptrace.h>
31#include <linux/preempt.h>
32#include <linux/module.h>
33#include <linux/kdebug.h>
33#include <asm/cacheflush.h>
34#include <asm/cacheflush.h>
34#include <asm/kdebug.h>
35#include <asm/sstep.h>
36#include <asm/uaccess.h>
37
38DEFINE_PER_CPU(struct kprobe *, current_kprobe) = NULL;
39DEFINE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk);
40
41int __kprobes arch_prepare_kprobe(struct kprobe *p)
42{

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405 * of do_debug, as if this is not a probe hit.
406 */
407 if (regs->msr & MSR_SE)
408 return 0;
409
410 return 1;
411}
412
35#include <asm/sstep.h>
36#include <asm/uaccess.h>
37
38DEFINE_PER_CPU(struct kprobe *, current_kprobe) = NULL;
39DEFINE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk);
40
41int __kprobes arch_prepare_kprobe(struct kprobe *p)
42{

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405 * of do_debug, as if this is not a probe hit.
406 */
407 if (regs->msr & MSR_SE)
408 return 0;
409
410 return 1;
411}
412
413int __kprobes kprobe_fault_handler(struct pt_regs *regs, int trapnr)
413static int __kprobes kprobe_fault_handler(struct pt_regs *regs, int trapnr)
414{
415 struct kprobe *cur = kprobe_running();
416 struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
417 const struct exception_table_entry *entry;
418
419 switch(kcb->kprobe_status) {
420 case KPROBE_HIT_SS:
421 case KPROBE_REENTER:

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490 case DIE_BPT:
491 if (kprobe_handler(args->regs))
492 ret = NOTIFY_STOP;
493 break;
494 case DIE_SSTEP:
495 if (post_kprobe_handler(args->regs))
496 ret = NOTIFY_STOP;
497 break;
414{
415 struct kprobe *cur = kprobe_running();
416 struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
417 const struct exception_table_entry *entry;
418
419 switch(kcb->kprobe_status) {
420 case KPROBE_HIT_SS:
421 case KPROBE_REENTER:

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490 case DIE_BPT:
491 if (kprobe_handler(args->regs))
492 ret = NOTIFY_STOP;
493 break;
494 case DIE_SSTEP:
495 if (post_kprobe_handler(args->regs))
496 ret = NOTIFY_STOP;
497 break;
498 case DIE_PAGE_FAULT:
499 /* kprobe_running() needs smp_processor_id() */
500 preempt_disable();
501 if (kprobe_running() &&
502 kprobe_fault_handler(args->regs, args->trapnr))
503 ret = NOTIFY_STOP;
504 preempt_enable();
505 break;
498 default:
499 break;
500 }
501 return ret;
502}
503
504int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)
505{

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507 break;
508 }
509 return ret;
510}
511
512int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)
513{

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