235 lines
8.0 KiB
C
235 lines
8.0 KiB
C
/*
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* File elf_private.h - definitions for processing of ELF files
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*
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* Copyright (C) 1996, Eric Youngdale.
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* 1999-2007 Eric Pouech
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#ifdef HAVE_ELF_H
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# include <elf.h>
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#endif
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#ifdef HAVE_SYS_ELF32_H
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# include <sys/elf32.h>
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#endif
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#ifdef HAVE_SYS_EXEC_ELF_H
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# include <sys/exec_elf.h>
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#endif
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#if !defined(DT_NUM)
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# if defined(DT_COUNT)
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# define DT_NUM DT_COUNT
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# else
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/* this seems to be a satisfactory value on Solaris, which doesn't support this AFAICT */
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# define DT_NUM 24
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# endif
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#endif
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#ifdef HAVE_LINK_H
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# include <link.h>
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#endif
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#ifdef HAVE_SYS_LINK_H
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# include <sys/link.h>
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#endif
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#ifdef HAVE_MACH_O_LOADER_H
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#include <mach-o/loader.h>
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#ifdef _WIN64
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typedef struct mach_header_64 macho_mach_header;
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typedef struct section_64 macho_section;
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#else
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typedef struct mach_header macho_mach_header;
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typedef struct section macho_section;
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#endif
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#endif
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#define IMAGE_NO_MAP ((void*)-1)
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#ifdef __ELF__
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#ifdef _WIN64
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#define Elf_Ehdr Elf64_Ehdr
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#define Elf_Shdr Elf64_Shdr
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#define Elf_Phdr Elf64_Phdr
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#define Elf_Dyn Elf64_Dyn
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#define Elf_Sym Elf64_Sym
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#define Elf_auxv_t Elf64_auxv_t
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#else
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#define Elf_Ehdr Elf32_Ehdr
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#define Elf_Shdr Elf32_Shdr
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#define Elf_Phdr Elf32_Phdr
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#define Elf_Dyn Elf32_Dyn
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#define Elf_Sym Elf32_Sym
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#define Elf_auxv_t Elf32_auxv_t
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#endif
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#else
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#ifndef SHT_NULL
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#define SHT_NULL 0
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#endif
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#endif
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/* structure holding information while handling an ELF image
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* allows one by one section mapping for memory savings
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*/
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struct image_file_map
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{
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enum module_type modtype;
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unsigned addr_size; /* either 16 (not used), 32 or 64 */
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union
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{
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struct elf_file_map
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{
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size_t elf_size;
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size_t elf_start;
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int fd;
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const char* shstrtab;
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struct image_file_map* alternate; /* another ELF file (linked to this one) */
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char* target_copy;
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#ifdef __ELF__
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Elf_Ehdr elfhdr;
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struct
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{
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Elf_Shdr shdr;
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const char* mapped;
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}* sect;
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#endif
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} elf;
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struct macho_file_map
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{
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size_t segs_size;
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size_t segs_start;
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int fd;
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struct image_file_map* dsym; /* the debug symbols file associated with this one */
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#ifdef HAVE_MACH_O_LOADER_H
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macho_mach_header mach_header;
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const struct load_command* load_commands;
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const struct uuid_command* uuid;
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/* The offset in the file which is this architecture. mach_header was
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* read from arch_offset. */
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unsigned arch_offset;
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int num_sections;
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struct
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{
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const macho_section* section;
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const char* mapped;
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unsigned int ignored : 1;
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}* sect;
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#endif
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} macho;
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struct pe_file_map
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{
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HANDLE hMap;
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IMAGE_NT_HEADERS ntheader;
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unsigned full_count;
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void* full_map;
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struct
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{
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IMAGE_SECTION_HEADER shdr;
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const char* mapped;
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}* sect;
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const char* strtable;
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} pe;
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} u;
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};
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struct image_section_map
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{
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struct image_file_map* fmap;
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long sidx;
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};
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extern BOOL elf_find_section(struct image_file_map* fmap, const char* name,
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unsigned sht, struct image_section_map* ism) DECLSPEC_HIDDEN;
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extern const char* elf_map_section(struct image_section_map* ism) DECLSPEC_HIDDEN;
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extern void elf_unmap_section(struct image_section_map* ism) DECLSPEC_HIDDEN;
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extern DWORD_PTR elf_get_map_rva(const struct image_section_map* ism) DECLSPEC_HIDDEN;
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extern unsigned elf_get_map_size(const struct image_section_map* ism) DECLSPEC_HIDDEN;
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extern BOOL macho_find_section(struct image_file_map* ifm, const char* segname,
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const char* sectname, struct image_section_map* ism) DECLSPEC_HIDDEN;
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extern const char* macho_map_section(struct image_section_map* ism) DECLSPEC_HIDDEN;
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extern void macho_unmap_section(struct image_section_map* ism) DECLSPEC_HIDDEN;
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extern DWORD_PTR macho_get_map_rva(const struct image_section_map* ism) DECLSPEC_HIDDEN;
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extern unsigned macho_get_map_size(const struct image_section_map* ism) DECLSPEC_HIDDEN;
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extern BOOL pe_find_section(struct image_file_map* fmap, const char* name,
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struct image_section_map* ism) DECLSPEC_HIDDEN;
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extern const char* pe_map_section(struct image_section_map* psm) DECLSPEC_HIDDEN;
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extern void pe_unmap_section(struct image_section_map* psm) DECLSPEC_HIDDEN;
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extern DWORD_PTR pe_get_map_rva(const struct image_section_map* psm) DECLSPEC_HIDDEN;
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extern unsigned pe_get_map_size(const struct image_section_map* psm) DECLSPEC_HIDDEN;
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static inline BOOL image_find_section(struct image_file_map* fmap, const char* name,
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struct image_section_map* ism)
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{
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switch (fmap->modtype)
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{
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case DMT_ELF: return elf_find_section(fmap, name, SHT_NULL, ism);
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case DMT_MACHO: return macho_find_section(fmap, NULL, name, ism);
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case DMT_PE: return pe_find_section(fmap, name, ism);
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default: assert(0); return FALSE;
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}
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}
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static inline const char* image_map_section(struct image_section_map* ism)
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{
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if (!ism->fmap) return NULL;
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switch (ism->fmap->modtype)
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{
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case DMT_ELF: return elf_map_section(ism);
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case DMT_MACHO: return macho_map_section(ism);
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case DMT_PE: return pe_map_section(ism);
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default: assert(0); return NULL;
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}
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}
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static inline void image_unmap_section(struct image_section_map* ism)
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{
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if (!ism->fmap) return;
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switch (ism->fmap->modtype)
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{
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case DMT_ELF: elf_unmap_section(ism); break;
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case DMT_MACHO: macho_unmap_section(ism); break;
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case DMT_PE: pe_unmap_section(ism); break;
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default: assert(0); return;
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}
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}
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static inline DWORD_PTR image_get_map_rva(const struct image_section_map* ism)
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{
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if (!ism->fmap) return 0;
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switch (ism->fmap->modtype)
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{
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case DMT_ELF: return elf_get_map_rva(ism);
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case DMT_MACHO: return macho_get_map_rva(ism);
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case DMT_PE: return pe_get_map_rva(ism);
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default: assert(0); return 0;
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}
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}
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static inline unsigned image_get_map_size(const struct image_section_map* ism)
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{
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if (!ism->fmap) return 0;
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switch (ism->fmap->modtype)
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{
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case DMT_ELF: return elf_get_map_size(ism);
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case DMT_MACHO: return macho_get_map_size(ism);
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case DMT_PE: return pe_get_map_size(ism);
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default: assert(0); return 0;
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}
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}
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