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 */ 70 extern int can_boost(kprobe_opcode_t *instruction); 71 /* Recover instruction if given address is probed */ 72 extern 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 */ 78 extern int __copy_instruction(u8 *dest, u8 *src); 79 80 /* Generate a relative-jump/call instruction */ 81 extern void synthesize_reljump(void *from, void *to); 82 extern void synthesize_relcall(void *from, void *to); 83 84 #ifdef CONFIG_OPTPROBES 85 extern int setup_detour_execution(struct kprobe *p, struct pt_regs *regs, int reenter); 86 extern unsigned long __recover_optprobed_insn(kprobe_opcode_t *buf, unsigned long addr); 87 #else /* !CONFIG_OPTPROBES */ 88 static inline int setup_detour_execution(struct kprobe *p, struct pt_regs *regs, int reenter) 89 { 90 return 0; 91 } 92 static 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 99 extern int skip_singlestep(struct kprobe *p, struct pt_regs *regs, 100 struct kprobe_ctlblk *kcb); 101 #else 102 static 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