diff options
Diffstat (limited to 'libcorkscrew/arch-mips/dwarf.h')
| -rw-r--r-- | libcorkscrew/arch-mips/dwarf.h | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/libcorkscrew/arch-mips/dwarf.h b/libcorkscrew/arch-mips/dwarf.h new file mode 100644 index 0000000..8504ea0 --- /dev/null +++ b/libcorkscrew/arch-mips/dwarf.h @@ -0,0 +1,187 @@ +/* + * Copyright (C) 2013 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +/* + * Dwarf2 data encoding flags. + */ + +#define DW_EH_PE_absptr 0x00 +#define DW_EH_PE_omit 0xff +#define DW_EH_PE_uleb128 0x01 +#define DW_EH_PE_udata2 0x02 +#define DW_EH_PE_udata4 0x03 +#define DW_EH_PE_udata8 0x04 +#define DW_EH_PE_sleb128 0x09 +#define DW_EH_PE_sdata2 0x0A +#define DW_EH_PE_sdata4 0x0B +#define DW_EH_PE_sdata8 0x0C +#define DW_EH_PE_signed 0x08 +#define DW_EH_PE_pcrel 0x10 +#define DW_EH_PE_textrel 0x20 +#define DW_EH_PE_datarel 0x30 +#define DW_EH_PE_funcrel 0x40 +#define DW_EH_PE_aligned 0x50 +#define DW_EH_PE_indirect 0x80 + +/* + * Dwarf2 call frame instructions. + */ + +typedef enum { + DW_CFA_advance_loc = 0x40, + DW_CFA_offset = 0x80, + DW_CFA_restore = 0xc0, + DW_CFA_nop = 0x00, + DW_CFA_set_loc = 0x01, + DW_CFA_advance_loc1 = 0x02, + DW_CFA_advance_loc2 = 0x03, + DW_CFA_advance_loc4 = 0x04, + DW_CFA_offset_extended = 0x05, + DW_CFA_restore_extended = 0x06, + DW_CFA_undefined = 0x07, + DW_CFA_same_value = 0x08, + DW_CFA_register = 0x09, + DW_CFA_remember_state = 0x0a, + DW_CFA_restore_state = 0x0b, + DW_CFA_def_cfa = 0x0c, + DW_CFA_def_cfa_register = 0x0d, + DW_CFA_def_cfa_offset = 0x0e +} dwarf_CFA; + +/* + * eh_frame_hdr information. +*/ + +typedef struct { + uint8_t version; + uint8_t eh_frame_ptr_enc; + uint8_t fde_count_enc; + uint8_t fde_table_enc; + uintptr_t eh_frame_ptr; + uint32_t fde_count; +} eh_frame_hdr_info_t; + +/* + * CIE information. +*/ + +typedef struct { + uint8_t version; + uint32_t code_align; + uint32_t data_align; + uint32_t reg; + uint32_t aug_z; + uint8_t aug_L; + uint8_t aug_R; + uint8_t aug_S; + uint32_t aug_P; +} cie_info_t; + +/* + * FDE information. +*/ + +typedef struct { + uint32_t start; + uint32_t length; // number of instructions covered by FDE + uint32_t aug_z; + uint32_t aug_L; +} fde_info_t; + +/* + * Dwarf state. +*/ + +/* Stack of states: required for DW_CFA_remember_state/DW_CFA_restore_state + 30 should be enough */ +#define DWARF_STATES_STACK 30 + +typedef struct { + char rule; // rule: o - offset(value); r - register(value) + uint32_t value; // value +} reg_rule_t; + +/* Dwarf preserved number of registers for mips */ +typedef enum + { + UNW_MIPS_R0, + UNW_MIPS_R1, + UNW_MIPS_R2, + UNW_MIPS_R3, + UNW_MIPS_R4, + UNW_MIPS_R5, + UNW_MIPS_R6, + UNW_MIPS_R7, + UNW_MIPS_R8, + UNW_MIPS_R9, + UNW_MIPS_R10, + UNW_MIPS_R11, + UNW_MIPS_R12, + UNW_MIPS_R13, + UNW_MIPS_R14, + UNW_MIPS_R15, + UNW_MIPS_R16, + UNW_MIPS_R17, + UNW_MIPS_R18, + UNW_MIPS_R19, + UNW_MIPS_R20, + UNW_MIPS_R21, + UNW_MIPS_R22, + UNW_MIPS_R23, + UNW_MIPS_R24, + UNW_MIPS_R25, + UNW_MIPS_R26, + UNW_MIPS_R27, + UNW_MIPS_R28, + UNW_MIPS_R29, + UNW_MIPS_R30, + UNW_MIPS_R31, + + UNW_MIPS_PC = 34, + + /* FIXME: Other registers! */ + + /* For MIPS, the CFA is the value of SP (r29) at the call site in the + previous frame. */ + UNW_MIPS_CFA, + + UNW_TDEP_LASTREG, + + UNW_TDEP_LAST_REG = UNW_MIPS_R31, + + UNW_TDEP_IP = UNW_MIPS_R31, + UNW_TDEP_SP = UNW_MIPS_R29, + UNW_TDEP_EH = UNW_MIPS_R0 /* FIXME. */ + + } +mips_regnum_t; + +#define DWARF_REGISTERS UNW_TDEP_LASTREG + +typedef struct { + uintptr_t loc; // location (ip) + uint8_t cfa_reg; // index of register where CFA location stored + intptr_t cfa_off; // offset + reg_rule_t regs[DWARF_REGISTERS]; // dwarf preserved registers for mips +} dwarf_state_t; + +/* DWARF registers we are caring about. */ + + +#define DWARF_SP UNW_MIPS_R29 +#define DWARF_RA UNW_MIPS_R31 +#define DWARF_PC UNW_MIPS_PC +#define DWARF_FP UNW_MIPS_CFA /* FIXME is this correct? */ |