kprobes.c (cb5629b10d64a8006622ce3a52bc887d91057d69) kprobes.c (172ae2e7f8ff9053905a36672453a6d2ff95b182)
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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31#include <linux/preempt.h>
32#include <linux/module.h>
33#include <linux/kdebug.h>
34#include <asm/cacheflush.h>
35#include <asm/sstep.h>
36#include <asm/uaccess.h>
37#include <asm/system.h>
38
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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31#include <linux/preempt.h>
32#include <linux/module.h>
33#include <linux/kdebug.h>
34#include <asm/cacheflush.h>
35#include <asm/sstep.h>
36#include <asm/uaccess.h>
37#include <asm/system.h>
38
39#ifdef CONFIG_BOOKE
39#ifdef CONFIG_PPC_ADV_DEBUG_REGS
40#define MSR_SINGLESTEP (MSR_DE)
41#else
42#define MSR_SINGLESTEP (MSR_SE)
43#endif
44
45DEFINE_PER_CPU(struct kprobe *, current_kprobe) = NULL;
46DEFINE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk);
47

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105static void __kprobes prepare_singlestep(struct kprobe *p, struct pt_regs *regs)
106{
107 /* We turn off async exceptions to ensure that the single step will
108 * be for the instruction we have the kprobe on, if we dont its
109 * possible we'd get the single step reported for an exception handler
110 * like Decrementer or External Interrupt */
111 regs->msr &= ~MSR_EE;
112 regs->msr |= MSR_SINGLESTEP;
40#define MSR_SINGLESTEP (MSR_DE)
41#else
42#define MSR_SINGLESTEP (MSR_SE)
43#endif
44
45DEFINE_PER_CPU(struct kprobe *, current_kprobe) = NULL;
46DEFINE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk);
47

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105static void __kprobes prepare_singlestep(struct kprobe *p, struct pt_regs *regs)
106{
107 /* We turn off async exceptions to ensure that the single step will
108 * be for the instruction we have the kprobe on, if we dont its
109 * possible we'd get the single step reported for an exception handler
110 * like Decrementer or External Interrupt */
111 regs->msr &= ~MSR_EE;
112 regs->msr |= MSR_SINGLESTEP;
113#ifdef CONFIG_BOOKE
113#ifdef CONFIG_PPC_ADV_DEBUG_REGS
114 regs->msr &= ~MSR_CE;
115 mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) | DBCR0_IC | DBCR0_IDM);
116#endif
117
118 /*
119 * On powerpc we should single step on the original
120 * instruction even if the probed insn is a trap
121 * variant as values in regs could play a part in

--- 460 unchanged lines hidden --- 		114 regs->msr &= ~MSR_CE;
115 mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) | DBCR0_IC | DBCR0_IDM);
116#endif
117
118 /*
119 * On powerpc we should single step on the original
120 * instruction even if the probed insn is a trap
121 * variant as values in regs could play a part in

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