| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 | |
| 9 | #ifdef CONFIG_FRAME_POINTER |
| 10 | # define SAVE_RBP_STRING " push %" _ASM_BP "\n" \ |
| 11 | " mov %" _ASM_SP ", %" _ASM_BP "\n" |
| 12 | #else |
| 13 | # define SAVE_RBP_STRING " push %" _ASM_BP "\n" |
| 14 | #endif |
| 15 | |
| 16 | #ifdef CONFIG_X86_64 |
| 17 | #define SAVE_REGS_STRING \ |
| 18 | /* Skip cs, ip, orig_ax. */ \ |
| 19 | " subq $24, %rsp\n" \ |
| 20 | " pushq %rdi\n" \ |
| 21 | " pushq %rsi\n" \ |
| 22 | " pushq %rdx\n" \ |
| 23 | " pushq %rcx\n" \ |
| 24 | " pushq %rax\n" \ |
| 25 | " pushq %r8\n" \ |
| 26 | " pushq %r9\n" \ |
| 27 | " pushq %r10\n" \ |
| 28 | " pushq %r11\n" \ |
| 29 | " pushq %rbx\n" \ |
| 30 | SAVE_RBP_STRING \ |
| 31 | " pushq %r12\n" \ |
| 32 | " pushq %r13\n" \ |
| 33 | " pushq %r14\n" \ |
| 34 | " pushq %r15\n" |
| 35 | #define RESTORE_REGS_STRING \ |
| 36 | " popq %r15\n" \ |
| 37 | " popq %r14\n" \ |
| 38 | " popq %r13\n" \ |
| 39 | " popq %r12\n" \ |
| 40 | " popq %rbp\n" \ |
| 41 | " popq %rbx\n" \ |
| 42 | " popq %r11\n" \ |
| 43 | " popq %r10\n" \ |
| 44 | " popq %r9\n" \ |
| 45 | " popq %r8\n" \ |
| 46 | " popq %rax\n" \ |
| 47 | " popq %rcx\n" \ |
| 48 | " popq %rdx\n" \ |
| 49 | " popq %rsi\n" \ |
| 50 | " popq %rdi\n" \ |
| 51 | /* Skip orig_ax, ip, cs */ \ |
| 52 | " addq $24, %rsp\n" |
| 53 | #else |
| 54 | #define SAVE_REGS_STRING \ |
| 55 | /* Skip cs, ip, orig_ax and gs. */ \ |
| 56 | " subl $16, %esp\n" \ |
| 57 | " pushl %fs\n" \ |
| 58 | " pushl %es\n" \ |
| 59 | " pushl %ds\n" \ |
| 60 | " pushl %eax\n" \ |
| 61 | SAVE_RBP_STRING \ |
| 62 | " pushl %edi\n" \ |
| 63 | " pushl %esi\n" \ |
| 64 | " pushl %edx\n" \ |
| 65 | " pushl %ecx\n" \ |
| 66 | " pushl %ebx\n" |
| 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, and ip. Note: don't pop cs here*/\ |
| 76 | " addl $24, %esp\n" |
| 77 | #endif |
| 78 | |
| 79 | /* Ensure if the instruction can be boostable */ |
| 80 | extern int can_boost(struct insn *insn, void *orig_addr); |
| 81 | /* Recover instruction if given address is probed */ |
| 82 | extern 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 | */ |
| 88 | extern int __copy_instruction(u8 *dest, u8 *src, u8 *real, struct insn *insn); |
| 89 | |
| 90 | /* Generate a relative-jump/call instruction */ |
| 91 | extern void synthesize_reljump(void *dest, void *from, void *to); |
| 92 | extern void synthesize_relcall(void *dest, void *from, void *to); |
| 93 | |
| 94 | #ifdef CONFIG_OPTPROBES |
| 95 | extern int setup_detour_execution(struct kprobe *p, struct pt_regs *regs, int reenter); |
| 96 | extern unsigned long __recover_optprobed_insn(kprobe_opcode_t *buf, unsigned long addr); |
| 97 | #else /* !CONFIG_OPTPROBES */ |
| 98 | static inline int setup_detour_execution(struct kprobe *p, struct pt_regs *regs, int reenter) |
| 99 | { |
| 100 | return 0; |
| 101 | } |
| 102 | static inline unsigned long __recover_optprobed_insn(kprobe_opcode_t *buf, unsigned long addr) |
| 103 | { |
| 104 | return addr; |
| 105 | } |
| 106 | #endif |
| 107 | |
| 108 | #endif |