Browse Source
binutils/ * od-macho.c (dump_section_header): Renames of dump_section. (dump_segment): Adjust after renaming. (OPT_COMPACT_UNWIND): Define. (options): Add compact unwind. (mach_o_help): Document compact_unwind. (unwind_x86_64_regs, unwind_x86_regs): New arrays. (dump_unwind_encoding_x86, dump_unwind_encoding) (dump_obj_compact_unwind, dump_exe_compact_unwind) (dump_section_content): New functions. (mach_o_dump): Handle compact unwind. include/mach-o/ * unwind.h: New file.gdb-7.8-branch
Tristan Gingold
13 years ago
4 changed files with 660 additions and 2 deletions
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/* Mach-O compact unwind encoding.
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Copyright (C) 2014 Free Software Foundation, Inc. |
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This file is part of BFD, the Binary File Descriptor library. |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 3 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
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MA 02110-1301, USA. */ |
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#ifndef _MACH_O_UNWIND_H |
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#define _MACH_O_UNWIND_H |
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/* Encodings bits for all cpus. */ |
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#define MACH_O_UNWIND_IS_NOT_FUNCTION_START 0x80000000 |
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#define MACH_O_UNWIND_HAS_LSDA 0x40000000 |
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#define MACH_O_UNWIND_PERSONALITY_MASK 0x30000000 |
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#define MACH_O_UNWIND_PERSONALITY_SHIFT 28 |
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/* Encodings for x86-64. */ |
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/* Kind of encoding (4 bits). */ |
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#define MACH_O_UNWIND_X86_64_MODE_MASK 0x0f000000 |
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/* Frame is RBP based, using the standard sequence: push %rbp; mov %rsp, %rbp.
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Non-volatile registers must be saved in the stack starting at %rbp-8 to |
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%rbp-2040 (offset is encoded in offset bits * 8). Registers saved are |
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encoded in registers bits, 3 bits per register. */ |
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#define MACH_O_UNWIND_X86_64_MODE_RBP_FRAME 0x01000000 |
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#define MACH_O_UNWIND_X86_64_RBP_FRAME_REGSITERS 0x00007FFF |
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#define MACH_O_UNWIND_X86_64_RBP_FRAME_OFFSET 0x00FF0000 |
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/* Frameless function, with a small stack size. */ |
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#define MACH_O_UNWIND_X86_64_MODE_STACK_IMMD 0x02000000 |
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#define MACH_O_UNWIND_X86_64_FRAMELESS_STACK_SIZE 0x00FF0000 |
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#define MACH_O_UNWIND_X86_64_FRAMELESS_REG_COUNT 0x00001C00 |
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#define MACH_O_UNWIND_X86_64_FRAMELESS_REG_PERMUTATION 0x000003FF |
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/* Frameless function, with a larger stack size. The stack size is the sum
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of the X in subq $X,%rsp (address of X is at function + stack size bits) |
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and stack adjust. */ |
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#define MACH_O_UNWIND_X86_64_MODE_STACK_IND 0x03000000 |
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#define MACH_O_UNWIND_X86_64_FRAMELESS_STACK_ADJUST 0x0000E000 |
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/* Use dwarf. */ |
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#define MACH_O_UNWIND_X86_64_MODE_DWARF 0x04000000 |
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#define MACH_O_UNWIND_X86_64_DWARF_SECTION_OFFSET 0x00ffffff |
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/* Registers. */ |
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#define MACH_O_UNWIND_X86_64_REG_NONE 0 |
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#define MACH_O_UNWIND_X86_64_REG_RBX 1 |
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#define MACH_O_UNWIND_X86_64_REG_R12 2 |
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#define MACH_O_UNWIND_X86_64_REG_R13 3 |
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#define MACH_O_UNWIND_X86_64_REG_R14 4 |
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#define MACH_O_UNWIND_X86_64_REG_R15 5 |
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#define MACH_O_UNWIND_X86_64_REG_RBP 6 |
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/* Encodings for x86 (almot the same as x86-64). */ |
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/* Kind of encoding (4 bits). */ |
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#define MACH_O_UNWIND_X86_MODE_MASK 0x0f000000 |
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/* Frame is EBP based, using the standard sequence: push %ebp; mov %esp, %ebp.
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Non-volatile registers must be saved in the stack starting at %ebp-4 to |
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%ebp-240 (offset is encoded in offset bits * 4). Registers saved are |
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encoded in registers bits, 3 bits per register. */ |
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#define MACH_O_UNWIND_X86_MODE_EBP_FRAME 0x01000000 |
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#define MACH_O_UNWIND_X86_EBP_FRAME_REGSITERS 0x00007FFF |
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#define MACH_O_UNWIND_X86_EBP_FRAME_OFFSET 0x00FF0000 |
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/* Frameless function, with a small stack size. */ |
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#define MACH_O_UNWIND_X86_MODE_STACK_IMMD 0x02000000 |
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#define MACH_O_UNWIND_X86_FRAMELESS_STACK_SIZE 0x00FF0000 |
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#define MACH_O_UNWIND_X86_FRAMELESS_REG_COUNT 0x00001C00 |
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#define MACH_O_UNWIND_X86_FRAMELESS_REG_PERMUTATION 0x000003FF |
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/* Frameless function, with a larger stack size. The stack size is the sum
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of the X in subq $X,%esp (address of X is at function + stack size bits) |
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and stack adjust. */ |
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#define MACH_O_UNWIND_X86_MODE_STACK_IND 0x03000000 |
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#define MACH_O_UNWIND_X86_FRAMELESS_STACK_ADJUST 0x0000E000 |
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/* Use dwarf. */ |
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#define MACH_O_UNWIND_X86_MODE_DWARF 0x04000000 |
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#define MACH_O_UNWIND_X86_DWARF_SECTION_OFFSET 0x00ffffff |
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/* Registers. */ |
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#define MACH_O_UNWIND_X86_REG_NONE 0 |
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#define MACH_O_UNWIND_X86_REG_EBX 1 |
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#define MACH_O_UNWIND_X86_REG_ECX 2 |
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#define MACH_O_UNWIND_X86_REG_EDX 3 |
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#define MACH_O_UNWIND_X86_REG_EDI 4 |
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#define MACH_O_UNWIND_X86_REG_ESI 5 |
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#define MACH_O_UNWIND_X86_REG_EBP 6 |
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/* Entry in object file (in __LD,__compact_unwind section). */ |
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struct mach_o_compact_unwind_32 |
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{ |
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unsigned char start[4]; |
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unsigned char length[4]; |
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unsigned char encoding[4]; |
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unsigned char personality[4]; |
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unsigned char lsda[4]; |
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}; |
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struct mach_o_compact_unwind_64 |
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{ |
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unsigned char start[8]; |
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unsigned char length[4]; |
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unsigned char encoding[4]; |
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unsigned char personnality[8]; |
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unsigned char lsda[8]; |
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}; |
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/* Header in images (in __TEXT,__unwind_info). */ |
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#define MACH_O_UNWIND_SECTION_VERSION 1 /* Current verion in header. */ |
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struct mach_o_unwind_info_header |
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{ |
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unsigned char version[4]; /* Currently MACH_O_UNWIND_SECTION_VERSION. */ |
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unsigned char encodings_array_offset[4]; |
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unsigned char encodings_array_count[4]; |
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unsigned char personality_array_offset[4]; |
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unsigned char personality_array_count[4]; |
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unsigned char index_offset[4]; |
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unsigned char index_count[4]; |
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/* Followed by:
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- encodings array |
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These are the encodings shared, for index < encoding_array_count |
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- personality array |
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count given by personality_array_count |
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- index entries |
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count given by index_count |
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- lsda index entries |
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last offset given by lsda offset of last index_entry. |
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*/ |
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}; |
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struct mach_o_unwind_index_entry |
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{ |
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unsigned char function_offset[4]; |
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unsigned char second_level_offset[4]; |
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unsigned char lsda_index_offset[4]; |
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}; |
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struct mach_o_unwind_lsda_index_entry |
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{ |
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unsigned char function_offset[4]; |
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unsigned char lsda_offset[4]; |
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}; |
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/* Second level index pages. */ |
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#define MACH_O_UNWIND_SECOND_LEVEL_REGULAR 2 |
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struct mach_o_unwind_regular_second_level_page_header |
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{ |
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unsigned char kind[4]; |
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unsigned char entry_page_offset[2]; |
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unsigned char entry_count[2]; |
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/* Array of entries. */ |
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}; |
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struct mach_o_unwind_regular_second_level_entry |
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{ |
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unsigned char function_offset[4]; |
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unsigned char encoding[4]; |
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}; |
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#define MACH_O_UNWIND_SECOND_LEVEL_COMPRESSED 3 |
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struct mach_o_unwind_compressed_second_level_page_header |
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{ |
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unsigned char kind[4]; |
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unsigned char entry_page_offset[2]; |
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unsigned char entry_count[2]; |
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unsigned char encodings_offset[2]; |
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unsigned char encodings_count[2]; |
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/* Followed by entries array (one word, see below). */ |
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/* Followed by (non-common) encodings array. */ |
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}; |
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/* Compressed entries are one word, containing function offset and encoding
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index. */ |
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#define MACH_O_UNWIND_INFO_COMPRESSED_ENTRY_FUNC_OFFSET(en) \ |
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((en) & 0x00FFFFFF) |
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#define MACH_O_UNWIND_INFO_COMPRESSED_ENTRY_ENCODING_INDEX(en) \ |
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(((en) >> 24) & 0xFF) |
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#endif /* _MACH_O_UNWIND_H */ |
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