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

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __X86_KERNEL_KPROBES_COMMON_H
   3#define __X86_KERNEL_KPROBES_COMMON_H
   4
   5/* Kprobes and Optprobes common header */
   6
   7#include <asm/asm.h>
   8#include <asm/frame.h>
   9
  10#ifdef CONFIG_X86_64
  11
  12#define SAVE_REGS_STRING                        \
  13        /* Skip cs, ip, orig_ax. */             \
  14        "       subq $24, %rsp\n"               \
  15        "       pushq %rdi\n"                   \
  16        "       pushq %rsi\n"                   \
  17        "       pushq %rdx\n"                   \
  18        "       pushq %rcx\n"                   \
  19        "       pushq %rax\n"                   \
  20        "       pushq %r8\n"                    \
  21        "       pushq %r9\n"                    \
  22        "       pushq %r10\n"                   \
  23        "       pushq %r11\n"                   \
  24        "       pushq %rbx\n"                   \
  25        "       pushq %rbp\n"                   \
  26        "       pushq %r12\n"                   \
  27        "       pushq %r13\n"                   \
  28        "       pushq %r14\n"                   \
  29        "       pushq %r15\n"                   \
  30        ENCODE_FRAME_POINTER
  31
  32#define RESTORE_REGS_STRING                     \
  33        "       popq %r15\n"                    \
  34        "       popq %r14\n"                    \
  35        "       popq %r13\n"                    \
  36        "       popq %r12\n"                    \
  37        "       popq %rbp\n"                    \
  38        "       popq %rbx\n"                    \
  39        "       popq %r11\n"                    \
  40        "       popq %r10\n"                    \
  41        "       popq %r9\n"                     \
  42        "       popq %r8\n"                     \
  43        "       popq %rax\n"                    \
  44        "       popq %rcx\n"                    \
  45        "       popq %rdx\n"                    \
  46        "       popq %rsi\n"                    \
  47        "       popq %rdi\n"                    \
  48        /* Skip orig_ax, ip, cs */              \
  49        "       addq $24, %rsp\n"
  50#else
  51
  52#define SAVE_REGS_STRING                        \
  53        /* Skip cs, ip, orig_ax and gs. */      \
  54        "       subl $4*4, %esp\n"              \
  55        "       pushl %fs\n"                    \
  56        "       pushl %es\n"                    \
  57        "       pushl %ds\n"                    \
  58        "       pushl %eax\n"                   \
  59        "       pushl %ebp\n"                   \
  60        "       pushl %edi\n"                   \
  61        "       pushl %esi\n"                   \
  62        "       pushl %edx\n"                   \
  63        "       pushl %ecx\n"                   \
  64        "       pushl %ebx\n"                   \
  65        ENCODE_FRAME_POINTER
  66
  67#define RESTORE_REGS_STRING                     \
  68        "       popl %ebx\n"                    \
  69        "       popl %ecx\n"                    \
  70        "       popl %edx\n"                    \
  71        "       popl %esi\n"                    \
  72        "       popl %edi\n"                    \
  73        "       popl %ebp\n"                    \
  74        "       popl %eax\n"                    \
  75        /* Skip ds, es, fs, gs, orig_ax, ip, and cs. */\
  76        "       addl $7*4, %esp\n"
  77#endif
  78
  79/* Ensure if the instruction can be boostable */
  80extern int can_boost(struct insn *insn, void *orig_addr);
  81/* Recover instruction if given address is probed */
  82extern unsigned long recover_probed_instruction(kprobe_opcode_t *buf,
  83                                         unsigned long addr);
  84/*
  85 * Copy an instruction and adjust the displacement if the instruction
  86 * uses the %rip-relative addressing mode.
  87 */
  88extern int __copy_instruction(u8 *dest, u8 *src, u8 *real, struct insn *insn);
  89
  90/* Generate a relative-jump/call instruction */
  91extern void synthesize_reljump(void *dest, void *from, void *to);
  92extern void synthesize_relcall(void *dest, void *from, void *to);
  93
  94#ifdef  CONFIG_OPTPROBES
  95extern int setup_detour_execution(struct kprobe *p, struct pt_regs *regs, int reenter);
  96extern unsigned long __recover_optprobed_insn(kprobe_opcode_t *buf, unsigned long addr);
  97#else   /* !CONFIG_OPTPROBES */
  98static inline int setup_detour_execution(struct kprobe *p, struct pt_regs *regs, int reenter)
  99{
 100        return 0;
 101}
 102static inline unsigned long __recover_optprobed_insn(kprobe_opcode_t *buf, unsigned long addr)
 103{
 104        return addr;
 105}
 106#endif
 107
 108#endif
 109