tools/objtool/include/objtool/arch.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com>
 */

#ifndef _ARCH_H
#define _ARCH_H

#include <stdbool.h>
#include <linux/list.h>
#include <objtool/objtool.h>
#include <objtool/cfi.h>

enum insn_type {
	INSN_JUMP_CONDITIONAL,
	INSN_JUMP_UNCONDITIONAL,
	INSN_JUMP_DYNAMIC,
	INSN_JUMP_DYNAMIC_CONDITIONAL,
	INSN_CALL,
	INSN_CALL_DYNAMIC,
	INSN_RETURN,
	INSN_SYSCALL,
	INSN_SYSRET,
	INSN_BUG,
	INSN_NOP,
	INSN_STAC,
	INSN_CLAC,
	INSN_STD,
	INSN_CLD,
	INSN_TRAP,
	INSN_ENDBR,
	INSN_LEA_RIP,
	INSN_OTHER,
};

enum op_dest_type {
	OP_DEST_REG,
	OP_DEST_REG_INDIRECT,
	OP_DEST_MEM,
	OP_DEST_PUSH,
	OP_DEST_PUSHF,
};

struct op_dest {
	enum op_dest_type type;
	unsigned char reg;
	int offset;
};

enum op_src_type {
	OP_SRC_REG,
	OP_SRC_REG_INDIRECT,
	OP_SRC_CONST,
	OP_SRC_POP,
	OP_SRC_POPF,
	OP_SRC_ADD,
	OP_SRC_AND,
};

struct op_src {
	enum op_src_type type;
	unsigned char reg;
	int offset;
};

struct stack_op {
	struct stack_op *next;
	struct op_dest dest;
	struct op_src src;
};

struct instruction;

int arch_ftrace_match(const char *name);

void arch_initial_func_cfi_state(struct cfi_init_state *state);

int arch_decode_instruction(struct objtool_file *file, const struct section *sec,
			    unsigned long offset, unsigned int maxlen,
			    struct instruction *insn);

size_t arch_jump_opcode_bytes(struct objtool_file *file, struct instruction *insn,
			      unsigned char *buf);

bool arch_callee_saved_reg(unsigned char reg);

unsigned long arch_jump_destination(struct instruction *insn);

s64 arch_insn_adjusted_addend(struct instruction *insn, struct reloc *reloc);
u64 arch_adjusted_addend(struct reloc *reloc);

const char *arch_nop_insn(int len);
const char *arch_ret_insn(int len);

int arch_decode_hint_reg(u8 sp_reg, int *base);

bool arch_is_retpoline(struct symbol *sym);
bool arch_is_rethunk(struct symbol *sym);
bool arch_is_embedded_insn(struct symbol *sym);

int arch_rewrite_retpolines(struct objtool_file *file);

bool arch_pc_relative_reloc(struct reloc *reloc);
bool arch_absolute_reloc(struct elf *elf, struct reloc *reloc);

unsigned int arch_reloc_size(struct reloc *reloc);
unsigned long arch_jump_table_sym_offset(struct reloc *reloc, struct reloc *table);

extern const char *arch_reg_name[CFI_NUM_REGS];

#ifdef DISAS

#include <bfd.h>
#include <dis-asm.h>

int arch_disas_info_init(struct disassemble_info *dinfo);

#endif /* DISAS */

#endif /* _ARCH_H */