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 "objtool.h"
  12 #include "cfi.h"
  13
  14 #ifdef INSN_USE_ORC
  15 #include <asm/orc_types.h>
  16 #endif
  17
  18 enum insn_type {
  19         INSN_JUMP_CONDITIONAL,
  20         INSN_JUMP_UNCONDITIONAL,
  21         INSN_JUMP_DYNAMIC,
  22         INSN_JUMP_DYNAMIC_CONDITIONAL,
  23         INSN_CALL,
  24         INSN_CALL_DYNAMIC,
  25         INSN_RETURN,
  26         INSN_CONTEXT_SWITCH,
  27         INSN_BUG,
  28         INSN_NOP,
  29         INSN_STAC,
  30         INSN_CLAC,
  31         INSN_STD,
  32         INSN_CLD,
  33         INSN_OTHER,
  34 };
  35
  36 enum op_dest_type {
  37         OP_DEST_REG,
  38         OP_DEST_REG_INDIRECT,
  39         OP_DEST_MEM,
  40         OP_DEST_PUSH,
  41         OP_DEST_PUSHF,
  42         OP_DEST_LEAVE,
  43 };
  44
  45 struct op_dest {
  46         enum op_dest_type type;
  47         unsigned char reg;
  48         int offset;
  49 };
  50
  51 enum op_src_type {
  52         OP_SRC_REG,
  53         OP_SRC_REG_INDIRECT,
  54         OP_SRC_CONST,
  55         OP_SRC_POP,
  56         OP_SRC_POPF,
  57         OP_SRC_ADD,
  58         OP_SRC_AND,
  59 };
  60
  61 struct op_src {
  62         enum op_src_type type;
  63         unsigned char reg;
  64         int offset;
  65 };
  66
  67 struct stack_op {
  68         struct op_dest dest;
  69         struct op_src src;
  70         struct list_head list;
  71 };
  72
  73 struct instruction;
  74
  75 void arch_initial_func_cfi_state(struct cfi_init_state *state);
  76
  77 int arch_decode_instruction(const struct elf *elf, const struct section *sec,
  78                             unsigned long offset, unsigned int maxlen,
  79                             unsigned int *len, enum insn_type *type,
  80                             unsigned long *immediate,
  81                             struct list_head *ops_list);
  82
  83 bool arch_callee_saved_reg(unsigned char reg);
  84
  85 unsigned long arch_jump_destination(struct instruction *insn);
  86
  87 unsigned long arch_dest_reloc_offset(int addend);
  88
  89 const char *arch_nop_insn(int len);
  90
  91 int arch_decode_hint_reg(struct instruction *insn, u8 sp_reg);
  92
  93 #endif /* _ARCH_H */