LXR linux/arch/x86/kernel/kprobes/common.h

   1#ifndef __X86_KERNEL_KPROBES_COMMON_H
   2#define __X86_KERNEL_KPROBES_COMMON_H
   3
   4/* Kprobes and Optprobes common header */
   5
   6#ifdef CONFIG_X86_64
   7#define SAVE_REGS_STRING                        \
   8        /* Skip cs, ip, orig_ax. */             \
   9        "       subq $24, %rsp\n"               \
  10        "       pushq %rdi\n"                   \
  11        "       pushq %rsi\n"                   \
  12        "       pushq %rdx\n"                   \
  13        "       pushq %rcx\n"                   \
  14        "       pushq %rax\n"                   \
  15        "       pushq %r8\n"                    \
  16        "       pushq %r9\n"                    \
  17        "       pushq %r10\n"                   \
  18        "       pushq %r11\n"                   \
  19        "       pushq %rbx\n"                   \
  20        "       pushq %rbp\n"                   \
  21        "       pushq %r12\n"                   \
  22        "       pushq %r13\n"                   \
  23        "       pushq %r14\n"                   \
  24        "       pushq %r15\n"
  25#define RESTORE_REGS_STRING                     \
  26        "       popq %r15\n"                    \
  27        "       popq %r14\n"                    \
  28        "       popq %r13\n"                    \
  29        "       popq %r12\n"                    \
  30        "       popq %rbp\n"                    \
  31        "       popq %rbx\n"                    \
  32        "       popq %r11\n"                    \
  33        "       popq %r10\n"                    \
  34        "       popq %r9\n"                     \
  35        "       popq %r8\n"                     \
  36        "       popq %rax\n"                    \
  37        "       popq %rcx\n"                    \
  38        "       popq %rdx\n"                    \
  39        "       popq %rsi\n"                    \
  40        "       popq %rdi\n"                    \
  41        /* Skip orig_ax, ip, cs */              \
  42        "       addq $24, %rsp\n"
  43#else
  44#define SAVE_REGS_STRING                        \
  45        /* Skip cs, ip, orig_ax and gs. */      \
  46        "       subl $16, %esp\n"               \
  47        "       pushl %fs\n"                    \
  48        "       pushl %es\n"                    \
  49        "       pushl %ds\n"                    \
  50        "       pushl %eax\n"                   \
  51        "       pushl %ebp\n"                   \
  52        "       pushl %edi\n"                   \
  53        "       pushl %esi\n"                   \
  54        "       pushl %edx\n"                   \
  55        "       pushl %ecx\n"                   \
  56        "       pushl %ebx\n"
  57#define RESTORE_REGS_STRING                     \
  58        "       popl %ebx\n"                    \
  59        "       popl %ecx\n"                    \
  60        "       popl %edx\n"                    \
  61        "       popl %esi\n"                    \
  62        "       popl %edi\n"                    \
  63        "       popl %ebp\n"                    \
  64        "       popl %eax\n"                    \
  65        /* Skip ds, es, fs, gs, orig_ax, and ip. Note: don't pop cs here*/\
  66        "       addl $24, %esp\n"
  67#endif
  68
  69/* Ensure if the instruction can be boostable */
  70extern int can_boost(kprobe_opcode_t *instruction);
  71/* Recover instruction if given address is probed */
  72extern unsigned long recover_probed_instruction(kprobe_opcode_t *buf,
  73                                         unsigned long addr);
  74/*
  75 * Copy an instruction and adjust the displacement if the instruction
  76 * uses the %rip-relative addressing mode.
  77 */
  78extern int __copy_instruction(u8 *dest, u8 *src);
  79
  80/* Generate a relative-jump/call instruction */
  81extern void synthesize_reljump(void *from, void *to);
  82extern void synthesize_relcall(void *from, void *to);
  83
  84#ifdef  CONFIG_OPTPROBES
  85extern int setup_detour_execution(struct kprobe *p, struct pt_regs *regs, int reenter);
  86extern unsigned long __recover_optprobed_insn(kprobe_opcode_t *buf, unsigned long addr);
  87#else   /* !CONFIG_OPTPROBES */
  88static inline int setup_detour_execution(struct kprobe *p, struct pt_regs *regs, int reenter)
  89{
  90        return 0;
  91}
  92static inline unsigned long __recover_optprobed_insn(kprobe_opcode_t *buf, unsigned long addr)
  93{
  94        return addr;
  95}
  96#endif
  97
  98#ifdef CONFIG_KPROBES_ON_FTRACE
  99extern int skip_singlestep(struct kprobe *p, struct pt_regs *regs,
 100                           struct kprobe_ctlblk *kcb);
 101#else
 102static inline int skip_singlestep(struct kprobe *p, struct pt_regs *regs,
 103                                  struct kprobe_ctlblk *kcb)
 104{
 105        return 0;
 106}
 107#endif
 108#endif
 109