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Diffstat (limited to 'include/asm-x86/kprobes_64.h')
| -rw-r--r-- | include/asm-x86/kprobes_64.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/include/asm-x86/kprobes_64.h b/include/asm-x86/kprobes_64.h new file mode 100644 index 000000000000..7db825403e01 --- /dev/null +++ b/include/asm-x86/kprobes_64.h @@ -0,0 +1,90 @@ +#ifndef _ASM_KPROBES_H +#define _ASM_KPROBES_H +/* + * Kernel Probes (KProbes) + * include/asm-x86_64/kprobes.h + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * Copyright (C) IBM Corporation, 2002, 2004 + * + * 2004-Oct Prasanna S Panchamukhi <prasanna@in.ibm.com> and Jim Keniston + * kenistoj@us.ibm.com adopted from i386. + */ +#include <linux/types.h> +#include <linux/ptrace.h> +#include <linux/percpu.h> + +#define __ARCH_WANT_KPROBES_INSN_SLOT + +struct pt_regs; +struct kprobe; + +typedef u8 kprobe_opcode_t; +#define BREAKPOINT_INSTRUCTION 0xcc +#define MAX_INSN_SIZE 15 +#define MAX_STACK_SIZE 64 +#define MIN_STACK_SIZE(ADDR) (((MAX_STACK_SIZE) < \ + (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR))) \ + ? (MAX_STACK_SIZE) \ + : (((unsigned long)current_thread_info()) + THREAD_SIZE - (ADDR))) + +#define ARCH_SUPPORTS_KRETPROBES +#define ARCH_INACTIVE_KPROBE_COUNT 1 + +void kretprobe_trampoline(void); +extern void arch_remove_kprobe(struct kprobe *p); +#define flush_insn_slot(p) do { } while (0) + +/* Architecture specific copy of original instruction*/ +struct arch_specific_insn { + /* copy of the original instruction */ + kprobe_opcode_t *insn; +}; + +struct prev_kprobe { + struct kprobe *kp; + unsigned long status; + unsigned long old_rflags; + unsigned long saved_rflags; +}; + +/* per-cpu kprobe control block */ +struct kprobe_ctlblk { + unsigned long kprobe_status; + unsigned long kprobe_old_rflags; + unsigned long kprobe_saved_rflags; + long *jprobe_saved_rsp; + struct pt_regs jprobe_saved_regs; + kprobe_opcode_t jprobes_stack[MAX_STACK_SIZE]; + struct prev_kprobe prev_kprobe; +}; + +/* trap3/1 are intr gates for kprobes. So, restore the status of IF, + * if necessary, before executing the original int3/1 (trap) handler. + */ +static inline void restore_interrupts(struct pt_regs *regs) +{ + if (regs->eflags & IF_MASK) + local_irq_enable(); +} + +extern int post_kprobe_handler(struct pt_regs *regs); +extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr); +extern int kprobe_handler(struct pt_regs *regs); + +extern int kprobe_exceptions_notify(struct notifier_block *self, + unsigned long val, void *data); +#endif /* _ASM_KPROBES_H */ |