141 lines
3.4 KiB
C
Executable File
141 lines
3.4 KiB
C
Executable File
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* Dwarf2 data encoding flags.
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*/
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#define DW_EH_PE_absptr 0x00
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#define DW_EH_PE_omit 0xff
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#define DW_EH_PE_uleb128 0x01
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#define DW_EH_PE_udata2 0x02
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#define DW_EH_PE_udata4 0x03
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#define DW_EH_PE_udata8 0x04
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#define DW_EH_PE_sleb128 0x09
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#define DW_EH_PE_sdata2 0x0A
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#define DW_EH_PE_sdata4 0x0B
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#define DW_EH_PE_sdata8 0x0C
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#define DW_EH_PE_signed 0x08
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#define DW_EH_PE_pcrel 0x10
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#define DW_EH_PE_textrel 0x20
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#define DW_EH_PE_datarel 0x30
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#define DW_EH_PE_funcrel 0x40
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#define DW_EH_PE_aligned 0x50
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#define DW_EH_PE_indirect 0x80
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/*
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* Dwarf2 call frame instructions.
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*/
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typedef enum {
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DW_CFA_advance_loc = 0x40,
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DW_CFA_offset = 0x80,
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DW_CFA_restore = 0xc0,
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DW_CFA_nop = 0x00,
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DW_CFA_set_loc = 0x01,
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DW_CFA_advance_loc1 = 0x02,
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DW_CFA_advance_loc2 = 0x03,
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DW_CFA_advance_loc4 = 0x04,
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DW_CFA_offset_extended = 0x05,
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DW_CFA_restore_extended = 0x06,
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DW_CFA_undefined = 0x07,
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DW_CFA_same_value = 0x08,
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DW_CFA_register = 0x09,
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DW_CFA_remember_state = 0x0a,
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DW_CFA_restore_state = 0x0b,
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DW_CFA_def_cfa = 0x0c,
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DW_CFA_def_cfa_register = 0x0d,
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DW_CFA_def_cfa_offset = 0x0e
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} dwarf_CFA;
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/*
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* eh_frame_hdr information.
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*/
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typedef struct {
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uint8_t version;
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uint8_t eh_frame_ptr_enc;
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uint8_t fde_count_enc;
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uint8_t fde_table_enc;
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uintptr_t eh_frame_ptr;
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uint32_t fde_count;
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} eh_frame_hdr_info_t;
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/*
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* CIE information.
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*/
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typedef struct {
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uint8_t version;
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uint32_t code_align;
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uint32_t data_align;
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uint32_t reg;
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uint32_t aug_z;
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uint8_t aug_L;
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uint8_t aug_R;
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uint8_t aug_S;
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uint32_t aug_P;
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} cie_info_t;
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/*
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* FDE information.
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*/
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typedef struct {
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uint32_t start;
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uint32_t length; // number of instructions covered by FDE
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uint32_t aug_z;
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uint32_t aug_L;
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} fde_info_t;
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/*
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* Dwarf state.
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*/
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/* Stack of states: required for DW_CFA_remember_state/DW_CFA_restore_state
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30 should be enough */
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#define DWARF_STATES_STACK 30
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typedef struct {
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char rule; // rule: o - offset(value); r - register(value)
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uint32_t value; // value
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} reg_rule_t;
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/* Dwarf preserved number of registers for x86. */
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#define DWARF_REGISTERS 17
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typedef struct {
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uintptr_t loc; // location (ip)
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uint8_t cfa_reg; // index of register where CFA location stored
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intptr_t cfa_off; // offset
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reg_rule_t regs[DWARF_REGISTERS]; // dwarf preserved registers for x86
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} dwarf_state_t;
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/* DWARF registers we are caring about. */
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#define DWARF_EAX 0
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#define DWARF_ECX 1
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#define DWARF_EDX 2
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#define DWARF_EBX 3
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#define DWARF_ESP 4
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#define DWARF_EBP 5
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#define DWARF_ESI 6
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#define DWARF_EDI 7
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#define DWARF_EIP 8
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