/* * File elf_private.h - definitions for processing of ELF files * * Copyright (C) 1996, Eric Youngdale. * 1999-2007 Eric Pouech * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA */ #ifdef HAVE_ELF_H # include #endif #ifdef HAVE_SYS_ELF32_H # include #endif #ifdef HAVE_SYS_EXEC_ELF_H # include #endif #if !defined(DT_NUM) # if defined(DT_COUNT) # define DT_NUM DT_COUNT # else /* this seems to be a satisfactory value on Solaris, which doesn't support this AFAICT */ # define DT_NUM 24 # endif #endif #ifdef HAVE_LINK_H # include #endif #ifdef HAVE_SYS_LINK_H # include #endif #ifdef HAVE_MACH_O_LOADER_H #include #ifdef _WIN64 typedef struct mach_header_64 macho_mach_header; typedef struct section_64 macho_section; #else typedef struct mach_header macho_mach_header; typedef struct section macho_section; #endif #endif #define IMAGE_NO_MAP ((void*)-1) #ifndef __ELF__ #ifndef SHT_NULL #define SHT_NULL 0 #endif #endif /* structure holding information while handling an ELF image * allows one by one section mapping for memory savings */ struct image_file_map { enum module_type modtype; unsigned addr_size; /* either 16 (not used), 32 or 64 */ union { struct elf_file_map { size_t elf_size; size_t elf_start; int fd; const char* shstrtab; struct image_file_map* alternate; /* another ELF file (linked to this one) */ char* target_copy; #ifdef __ELF__ Elf64_Ehdr elfhdr; struct { Elf64_Shdr shdr; const char* mapped; }* sect; #endif } elf; struct macho_file_map { size_t segs_size; size_t segs_start; int fd; struct image_file_map* dsym; /* the debug symbols file associated with this one */ #ifdef HAVE_MACH_O_LOADER_H macho_mach_header mach_header; const struct load_command* load_commands; const struct uuid_command* uuid; /* The offset in the file which is this architecture. mach_header was * read from arch_offset. */ unsigned arch_offset; int num_sections; struct { const macho_section* section; const char* mapped; unsigned int ignored : 1; }* sect; #endif } macho; struct pe_file_map { HANDLE hMap; IMAGE_NT_HEADERS ntheader; unsigned full_count; void* full_map; struct { IMAGE_SECTION_HEADER shdr; const char* mapped; }* sect; const char* strtable; } pe; } u; }; struct image_section_map { struct image_file_map* fmap; long sidx; }; extern BOOL elf_find_section(struct image_file_map* fmap, const char* name, unsigned sht, struct image_section_map* ism) DECLSPEC_HIDDEN; extern const char* elf_map_section(struct image_section_map* ism) DECLSPEC_HIDDEN; extern void elf_unmap_section(struct image_section_map* ism) DECLSPEC_HIDDEN; extern DWORD_PTR elf_get_map_rva(const struct image_section_map* ism) DECLSPEC_HIDDEN; extern unsigned elf_get_map_size(const struct image_section_map* ism) DECLSPEC_HIDDEN; extern BOOL macho_find_section(struct image_file_map* ifm, const char* segname, const char* sectname, struct image_section_map* ism) DECLSPEC_HIDDEN; extern const char* macho_map_section(struct image_section_map* ism) DECLSPEC_HIDDEN; extern void macho_unmap_section(struct image_section_map* ism) DECLSPEC_HIDDEN; extern DWORD_PTR macho_get_map_rva(const struct image_section_map* ism) DECLSPEC_HIDDEN; extern unsigned macho_get_map_size(const struct image_section_map* ism) DECLSPEC_HIDDEN; extern BOOL pe_find_section(struct image_file_map* fmap, const char* name, struct image_section_map* ism) DECLSPEC_HIDDEN; extern const char* pe_map_section(struct image_section_map* psm) DECLSPEC_HIDDEN; extern void pe_unmap_section(struct image_section_map* psm) DECLSPEC_HIDDEN; extern DWORD_PTR pe_get_map_rva(const struct image_section_map* psm) DECLSPEC_HIDDEN; extern unsigned pe_get_map_size(const struct image_section_map* psm) DECLSPEC_HIDDEN; static inline BOOL image_find_section(struct image_file_map* fmap, const char* name, struct image_section_map* ism) { switch (fmap->modtype) { case DMT_ELF: return elf_find_section(fmap, name, SHT_NULL, ism); case DMT_MACHO: return macho_find_section(fmap, NULL, name, ism); case DMT_PE: return pe_find_section(fmap, name, ism); default: assert(0); return FALSE; } } static inline const char* image_map_section(struct image_section_map* ism) { if (!ism->fmap) return NULL; switch (ism->fmap->modtype) { case DMT_ELF: return elf_map_section(ism); case DMT_MACHO: return macho_map_section(ism); case DMT_PE: return pe_map_section(ism); default: assert(0); return NULL; } } static inline void image_unmap_section(struct image_section_map* ism) { if (!ism->fmap) return; switch (ism->fmap->modtype) { case DMT_ELF: elf_unmap_section(ism); break; case DMT_MACHO: macho_unmap_section(ism); break; case DMT_PE: pe_unmap_section(ism); break; default: assert(0); return; } } static inline DWORD_PTR image_get_map_rva(const struct image_section_map* ism) { if (!ism->fmap) return 0; switch (ism->fmap->modtype) { case DMT_ELF: return elf_get_map_rva(ism); case DMT_MACHO: return macho_get_map_rva(ism); case DMT_PE: return pe_get_map_rva(ism); default: assert(0); return 0; } } static inline unsigned image_get_map_size(const struct image_section_map* ism) { if (!ism->fmap) return 0; switch (ism->fmap->modtype) { case DMT_ELF: return elf_get_map_size(ism); case DMT_MACHO: return macho_get_map_size(ism); case DMT_PE: return pe_get_map_size(ism); default: assert(0); return 0; } }