cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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common.h (2738B)

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