/*- * Copyright (c) 2006 Joseph Koshy * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD$ */ #ifndef __LIBELF_H_ #define __LIBELF_H_ #include #ifndef NULL #define NULL ((void *) 0) #endif /* * Library-private data structures. */ #define LIBELF_MSG_SIZE 256 struct _libelf_globals { int libelf_arch; unsigned int libelf_byteorder; int libelf_class; int libelf_error; int libelf_fillchar; unsigned int libelf_version; char libelf_msg[LIBELF_MSG_SIZE]; }; extern struct _libelf_globals _libelf; #define LIBELF_PRIVATE(N) (_libelf.libelf_##N) #define LIBELF_ELF_ERROR_MASK 0xFF #define LIBELF_OS_ERROR_SHIFT 8 #define LIBELF_SET_ERROR(E, O) do { \ LIBELF_PRIVATE(error) = ((ELF_E_##E & LIBELF_ELF_ERROR_MASK)| \ ((O) << LIBELF_OS_ERROR_SHIFT)); \ } while (0) #define LIBELF_ADJUST_AR_SIZE(S) (((S) + 1U) & ~1U) /* * Flags for library internal use. These use the upper 16 bits of a * flags field. */ #define LIBELF_F_MALLOCED 0x010000 /* whether data was malloc'ed */ #define LIBELF_F_MMAP 0x020000 /* whether e_rawfile was mmap'ed */ #define LIBELF_F_SHDRS_LOADED 0x040000 /* whether all shdrs were read in */ struct _Elf { int e_activations; /* activation count */ Elf_Arhdr *e_arhdr; /* header for archive members */ unsigned int e_byteorder; /* ELFDATA* */ int e_class; /* ELFCLASS* */ Elf_Cmd e_cmd; /* ELF_C_* used at creation time */ int e_fd; /* associated file descriptor */ unsigned int e_flags; /* ELF_F_*, LIBELF_F_* flags */ Elf_Kind e_kind; /* ELF_K_* */ Elf *e_parent; /* non-NULL for archive members */ char *e_rawfile; /* uninterpreted bytes */ size_t e_rawsize; /* size of uninterpreted bytes */ unsigned int e_version; /* file version */ union { struct { /* ar(1) archives */ off_t e_next; /* set by elf_rand()/elf_next() */ int e_nchildren; char *e_rawstrtab; /* file name strings */ size_t e_rawstrtabsz; char *e_rawsymtab; /* symbol table */ size_t e_rawsymtabsz; Elf_Arsym *e_symtab; size_t e_symtabsz; } e_ar; struct { /* regular ELF files */ union { Elf32_Ehdr *e_ehdr32; Elf64_Ehdr *e_ehdr64; } e_ehdr; union { Elf32_Phdr *e_phdr32; Elf64_Phdr *e_phdr64; } e_phdr; STAILQ_HEAD(, _Elf_Scn) e_scn; /* section list */ size_t e_nphdr; /* number of Phdr entries */ size_t e_nscn; /* number of sections */ size_t e_strndx; /* string table section index */ } e_elf; } e_u; }; struct _Elf_Scn { union { Elf32_Shdr s_shdr32; Elf64_Shdr s_shdr64; } s_shdr; STAILQ_HEAD(, _Elf_Data) s_data; /* list of Elf_Data descriptors */ STAILQ_HEAD(, _Elf_Data) s_rawdata; /* raw data for this section */ STAILQ_ENTRY(_Elf_Scn) s_next; struct _Elf *s_elf; /* parent ELF descriptor */ unsigned int s_flags; /* flags for the section as a whole */ size_t s_ndx; /* index# for this section */ uint64_t s_offset; /* managed by elf_update() */ uint64_t s_rawoff; /* original offset in the file */ uint64_t s_size; /* managed by elf_update() */ }; enum { ELF_TOFILE, ELF_TOMEMORY }; #define LIBELF_COPY_U32(DST,SRC,NAME) do { \ if ((SRC)->NAME > UINT_MAX) { \ LIBELF_SET_ERROR(RANGE, 0); \ return (0); \ } \ (DST)->NAME = (SRC)->NAME; \ } while (0) #define LIBELF_COPY_S32(DST,SRC,NAME) do { \ if ((SRC)->NAME > INT_MAX || \ (SRC)->NAME < INT_MIN) { \ LIBELF_SET_ERROR(RANGE, 0); \ return (0); \ } \ (DST)->NAME = (SRC)->NAME; \ } while (0) /* * Prototypes */ Elf_Data *_libelf_allocate_data(Elf_Scn *_s); Elf *_libelf_allocate_elf(void); Elf_Scn *_libelf_allocate_scn(Elf *_e, size_t _ndx); Elf_Arhdr *_libelf_ar_gethdr(Elf *_e); Elf *_libelf_ar_open(Elf *_e); Elf *_libelf_ar_open_member(int _fd, Elf_Cmd _c, Elf *_ar); Elf_Arsym *_libelf_ar_process_symtab(Elf *_ar, size_t *_dst); unsigned long _libelf_checksum(Elf *_e, int _elfclass); void *_libelf_ehdr(Elf *_e, int _elfclass, int _allocate); int _libelf_falign(Elf_Type _t, int _elfclass); size_t _libelf_fsize(Elf_Type _t, int _elfclass, unsigned int _version, size_t count); void (*_libelf_get_translator(Elf_Type _t, int _direction, int _elfclass)) (char *_dst, char *_src, size_t _cnt, int _byteswap); void *_libelf_getphdr(Elf *_e, int _elfclass); void *_libelf_getshdr(Elf_Scn *_scn, int _elfclass); void _libelf_init_elf(Elf *_e, Elf_Kind _kind); int _libelf_malign(Elf_Type _t, int _elfclass); size_t _libelf_msize(Elf_Type _t, int _elfclass, unsigned int _version); void *_libelf_newphdr(Elf *_e, int _elfclass, size_t _count); Elf_Data *_libelf_release_data(Elf_Data *_d); Elf *_libelf_release_elf(Elf *_e); Elf_Scn *_libelf_release_scn(Elf_Scn *_s); int _libelf_setphnum(Elf *_e, void *_eh, int _elfclass, size_t _phnum); int _libelf_setshnum(Elf *_e, void *_eh, int _elfclass, size_t _shnum); int _libelf_setshstrndx(Elf *_e, void *_eh, int _elfclass, size_t _shstrndx); Elf_Data *_libelf_xlate(Elf_Data *_d, const Elf_Data *_s, unsigned int _encoding, int _elfclass, int _direction); int _libelf_xlate_shtype(uint32_t _sht); #endif /* __LIBELF_H_ */