tools/objtool/arch.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com>
   4  */
   5
   6 #ifndef _ARCH_H
   7 #define _ARCH_H
   8
   9 #include <stdbool.h>
  10 #include <linux/list.h>
  11 #include "elf.h"
  12 #include "cfi.h"
  13
  14 #define INSN_JUMP_CONDITIONAL   1
  15 #define INSN_JUMP_UNCONDITIONAL 2
  16 #define INSN_JUMP_DYNAMIC       3
  17 #define INSN_CALL               4
  18 #define INSN_CALL_DYNAMIC       5
  19 #define INSN_RETURN             6
  20 #define INSN_CONTEXT_SWITCH     7
  21 #define INSN_STACK              8
  22 #define INSN_BUG                9
  23 #define INSN_NOP                10
  24 #define INSN_STAC               11
  25 #define INSN_CLAC               12
  26 #define INSN_STD                13
  27 #define INSN_CLD                14
  28 #define INSN_OTHER              15
  29 #define INSN_LAST               INSN_OTHER
  30
  31 enum op_dest_type {
  32         OP_DEST_REG,
  33         OP_DEST_REG_INDIRECT,
  34         OP_DEST_MEM,
  35         OP_DEST_PUSH,
  36         OP_DEST_PUSHF,
  37         OP_DEST_LEAVE,
  38 };
  39
  40 struct op_dest {
  41         enum op_dest_type type;
  42         unsigned char reg;
  43         int offset;
  44 };
  45
  46 enum op_src_type {
  47         OP_SRC_REG,
  48         OP_SRC_REG_INDIRECT,
  49         OP_SRC_CONST,
  50         OP_SRC_POP,
  51         OP_SRC_POPF,
  52         OP_SRC_ADD,
  53         OP_SRC_AND,
  54 };
  55
  56 struct op_src {
  57         enum op_src_type type;
  58         unsigned char reg;
  59         int offset;
  60 };
  61
  62 struct stack_op {
  63         struct op_dest dest;
  64         struct op_src src;
  65 };
  66
  67 void arch_initial_func_cfi_state(struct cfi_state *state);
  68
  69 int arch_decode_instruction(struct elf *elf, struct section *sec,
  70                             unsigned long offset, unsigned int maxlen,
  71                             unsigned int *len, unsigned char *type,
  72                             unsigned long *immediate, struct stack_op *op);
  73
  74 bool arch_callee_saved_reg(unsigned char reg);
  75
  76 #endif /* _ARCH_H */