1 #ifndef __X86_KERNEL_KPROBES_COMMON_H 2 #define __X86_KERNEL_KPROBES_COMMON_H 3 4 /* Kprobes and Optprobes common header */ 5 6 #include <asm/asm.h> 7 8 #ifdef CONFIG_FRAME_POINTER 9 # define SAVE_RBP_STRING " push %" _ASM_BP "\n" \ 10 " mov %" _ASM_SP ", %" _ASM_BP "\n" 11 #else 12 # define SAVE_RBP_STRING " push %" _ASM_BP "\n" 13 #endif 14 15 #ifdef CONFIG_X86_64 16 #define SAVE_REGS_STRING \ 17 /* Skip cs, ip, orig_ax. */ \ 18 " subq $24, %rsp\n" \ 19 " pushq %rdi\n" \ 20 " pushq %rsi\n" \ 21 " pushq %rdx\n" \ 22 " pushq %rcx\n" \ 23 " pushq %rax\n" \ 24 " pushq %r8\n" \ 25 " pushq %r9\n" \ 26 " pushq %r10\n" \ 27 " pushq %r11\n" \ 28 " pushq %rbx\n" \ 29 SAVE_RBP_STRING \ 30 " pushq %r12\n" \ 31 " pushq %r13\n" \ 32 " pushq %r14\n" \ 33 " pushq %r15\n" 34 #define RESTORE_REGS_STRING \ 35 " popq %r15\n" \ 36 " popq %r14\n" \ 37 " popq %r13\n" \ 38 " popq %r12\n" \ 39 " popq %rbp\n" \ 40 " popq %rbx\n" \ 41 " popq %r11\n" \ 42 " popq %r10\n" \ 43 " popq %r9\n" \ 44 " popq %r8\n" \ 45 " popq %rax\n" \ 46 " popq %rcx\n" \ 47 " popq %rdx\n" \ 48 " popq %rsi\n" \ 49 " popq %rdi\n" \ 50 /* Skip orig_ax, ip, cs */ \ 51 " addq $24, %rsp\n" 52 #else 53 #define SAVE_REGS_STRING \ 54 /* Skip cs, ip, orig_ax and gs. */ \ 55 " subl $16, %esp\n" \ 56 " pushl %fs\n" \ 57 " pushl %es\n" \ 58 " pushl %ds\n" \ 59 " pushl %eax\n" \ 60 SAVE_RBP_STRING \ 61 " pushl %edi\n" \ 62 " pushl %esi\n" \ 63 " pushl %edx\n" \ 64 " pushl %ecx\n" \ 65 " pushl %ebx\n" 66 #define RESTORE_REGS_STRING \ 67 " popl %ebx\n" \ 68 " popl %ecx\n" \ 69 " popl %edx\n" \ 70 " popl %esi\n" \ 71 " popl %edi\n" \ 72 " popl %ebp\n" \ 73 " popl %eax\n" \ 74 /* Skip ds, es, fs, gs, orig_ax, and ip. Note: don't pop cs here*/\ 75 " addl $24, %esp\n" 76 #endif 77 78 /* Ensure if the instruction can be boostable */ 79 extern int can_boost(struct insn *insn, void *orig_addr); 80 /* Recover instruction if given address is probed */ 81 extern unsigned long recover_probed_instruction(kprobe_opcode_t *buf, 82 unsigned long addr); 83 /* 84 * Copy an instruction and adjust the displacement if the instruction 85 * uses the %rip-relative addressing mode. 86 */ 87 extern int __copy_instruction(u8 *dest, u8 *src, struct insn *insn); 88 89 /* Generate a relative-jump/call instruction */ 90 extern void synthesize_reljump(void *from, void *to); 91 extern void synthesize_relcall(void *from, void *to); 92 93 #ifdef CONFIG_OPTPROBES 94 extern int setup_detour_execution(struct kprobe *p, struct pt_regs *regs, int reenter); 95 extern unsigned long __recover_optprobed_insn(kprobe_opcode_t *buf, unsigned long addr); 96 #else /* !CONFIG_OPTPROBES */ 97 static inline int setup_detour_execution(struct kprobe *p, struct pt_regs *regs, int reenter) 98 { 99 return 0; 100 } 101 static inline unsigned long __recover_optprobed_insn(kprobe_opcode_t *buf, unsigned long addr) 102 { 103 return addr; 104 } 105 #endif 106 107 #ifdef CONFIG_KPROBES_ON_FTRACE 108 extern int skip_singlestep(struct kprobe *p, struct pt_regs *regs, 109 struct kprobe_ctlblk *kcb); 110 #else 111 static inline int skip_singlestep(struct kprobe *p, struct pt_regs *regs, 112 struct kprobe_ctlblk *kcb) 113 { 114 return 0; 115 } 116 #endif 117 #endif 118