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 arch_init_optprobes(void);
 86extern int setup_detour_execution(struct kprobe *p, struct pt_regs *regs, int reenter);
 87extern unsigned long __recover_optprobed_insn(kprobe_opcode_t *buf, unsigned long addr);
 88#else	/* !CONFIG_OPTPROBES */
 89static inline int arch_init_optprobes(void)
 90{
 91	return 0;
 92}
 93static inline int setup_detour_execution(struct kprobe *p, struct pt_regs *regs, int reenter)
 94{
 95	return 0;
 96}
 97static inline unsigned long __recover_optprobed_insn(kprobe_opcode_t *buf, unsigned long addr)
 98{
 99	return addr;
100}
101#endif
102#endif