tools/objtool/arch.h

   1 /*
   2  * Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com>
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #ifndef _ARCH_H
  19 #define _ARCH_H
  20
  21 #include <stdbool.h>
  22 #include <linux/list.h>
  23 #include "elf.h"
  24 #include "cfi.h"
  25
  26 #define INSN_JUMP_CONDITIONAL   1
  27 #define INSN_JUMP_UNCONDITIONAL 2
  28 #define INSN_JUMP_DYNAMIC       3
  29 #define INSN_CALL               4
  30 #define INSN_CALL_DYNAMIC       5
  31 #define INSN_RETURN             6
  32 #define INSN_CONTEXT_SWITCH     7
  33 #define INSN_STACK              8
  34 #define INSN_BUG                9
  35 #define INSN_NOP                10
  36 #define INSN_OTHER              11
  37 #define INSN_LAST               INSN_OTHER
  38
  39 enum op_dest_type {
  40         OP_DEST_REG,
  41         OP_DEST_REG_INDIRECT,
  42         OP_DEST_MEM,
  43         OP_DEST_PUSH,
  44         OP_DEST_LEAVE,
  45 };
  46
  47 struct op_dest {
  48         enum op_dest_type type;
  49         unsigned char reg;
  50         int offset;
  51 };
  52
  53 enum op_src_type {
  54         OP_SRC_REG,
  55         OP_SRC_REG_INDIRECT,
  56         OP_SRC_CONST,
  57         OP_SRC_POP,
  58         OP_SRC_ADD,
  59         OP_SRC_AND,
  60 };
  61
  62 struct op_src {
  63         enum op_src_type type;
  64         unsigned char reg;
  65         int offset;
  66 };
  67
  68 struct stack_op {
  69         struct op_dest dest;
  70         struct op_src src;
  71 };
  72
  73 void arch_initial_func_cfi_state(struct cfi_state *state);
  74
  75 int arch_decode_instruction(struct elf *elf, struct section *sec,
  76                             unsigned long offset, unsigned int maxlen,
  77                             unsigned int *len, unsigned char *type,
  78                             unsigned long *immediate, struct stack_op *op);
  79
  80 bool arch_callee_saved_reg(unsigned char reg);
  81
  82 #endif /* _ARCH_H */