2 * Copyright (c) 2006 Joseph Koshy
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include <sys/queue.h>
35 #define NULL ((void *) 0)
39 * Library-private data structures.
42 #define LIBELF_MSG_SIZE 256
44 struct _libelf_globals {
46 unsigned int libelf_byteorder;
50 unsigned int libelf_version;
51 char libelf_msg[LIBELF_MSG_SIZE];
54 extern struct _libelf_globals _libelf;
56 #define LIBELF_PRIVATE(N) (_libelf.libelf_##N)
58 #define LIBELF_ELF_ERROR_MASK 0xFF
59 #define LIBELF_OS_ERROR_SHIFT 8
61 #define LIBELF_SET_ERROR(E, O) do { \
62 LIBELF_PRIVATE(error) = ((ELF_E_##E & LIBELF_ELF_ERROR_MASK)| \
63 ((O) << LIBELF_OS_ERROR_SHIFT)); \
66 #define LIBELF_ADJUST_AR_SIZE(S) (((S) + 1U) & ~1U)
69 * Flags for library internal use. These use the upper 16 bits of a
72 #define LIBELF_F_MALLOCED 0x010000 /* whether data was malloc'ed */
73 #define LIBELF_F_MMAP 0x020000 /* whether e_rawfile was mmap'ed */
74 #define LIBELF_F_SHDRS_LOADED 0x040000 /* whether all shdrs were read in */
77 int e_activations; /* activation count */
78 Elf_Arhdr *e_arhdr; /* header for archive members */
79 unsigned int e_byteorder; /* ELFDATA* */
80 int e_class; /* ELFCLASS* */
81 Elf_Cmd e_cmd; /* ELF_C_* used at creation time */
82 int e_fd; /* associated file descriptor */
83 unsigned int e_flags; /* ELF_F_*, LIBELF_F_* flags */
84 Elf_Kind e_kind; /* ELF_K_* */
85 Elf *e_parent; /* non-NULL for archive members */
86 char *e_rawfile; /* uninterpreted bytes */
87 size_t e_rawsize; /* size of uninterpreted bytes */
88 unsigned int e_version; /* file version */
91 struct { /* ar(1) archives */
92 off_t e_next; /* set by elf_rand()/elf_next() */
94 char *e_rawstrtab; /* file name strings */
96 char *e_rawsymtab; /* symbol table */
101 struct { /* regular ELF files */
103 Elf32_Ehdr *e_ehdr32;
104 Elf64_Ehdr *e_ehdr64;
107 Elf32_Phdr *e_phdr32;
108 Elf64_Phdr *e_phdr64;
110 STAILQ_HEAD(, _Elf_Scn) e_scn; /* section list */
111 size_t e_nphdr; /* number of Phdr entries */
112 size_t e_nscn; /* number of sections */
113 size_t e_strndx; /* string table section index */
123 STAILQ_HEAD(, _Elf_Data) s_data; /* list of Elf_Data descriptors */
124 STAILQ_HEAD(, _Elf_Data) s_rawdata; /* raw data for this section */
125 STAILQ_ENTRY(_Elf_Scn) s_next;
126 struct _Elf *s_elf; /* parent ELF descriptor */
127 unsigned int s_flags; /* flags for the section as a whole */
128 size_t s_ndx; /* index# for this section */
129 uint64_t s_offset; /* managed by elf_update() */
130 uint64_t s_rawoff; /* original offset in the file */
131 uint64_t s_size; /* managed by elf_update() */
140 #define LIBELF_COPY_U32(DST,SRC,NAME) do { \
141 if ((SRC)->NAME > UINT_MAX) { \
142 LIBELF_SET_ERROR(RANGE, 0); \
145 (DST)->NAME = (SRC)->NAME; \
148 #define LIBELF_COPY_S32(DST,SRC,NAME) do { \
149 if ((SRC)->NAME > INT_MAX || \
150 (SRC)->NAME < INT_MIN) { \
151 LIBELF_SET_ERROR(RANGE, 0); \
154 (DST)->NAME = (SRC)->NAME; \
162 Elf_Data *_libelf_allocate_data(Elf_Scn *_s);
163 Elf *_libelf_allocate_elf(void);
164 Elf_Scn *_libelf_allocate_scn(Elf *_e, size_t _ndx);
165 Elf_Arhdr *_libelf_ar_gethdr(Elf *_e);
166 Elf *_libelf_ar_open(Elf *_e);
167 Elf *_libelf_ar_open_member(int _fd, Elf_Cmd _c, Elf *_ar);
168 int _libelf_ar_get_member(char *_s, size_t _sz, int _base, size_t *_ret);
169 char *_libelf_ar_get_string(const char *_buf, size_t _sz, int _rawname);
170 char *_libelf_ar_get_name(char *_buf, size_t _sz, Elf *_e);
171 int _libelf_ar_get_number(char *_buf, size_t _sz, int _base, size_t *_ret);
172 Elf_Arsym *_libelf_ar_process_symtab(Elf *_ar, size_t *_dst);
173 unsigned long _libelf_checksum(Elf *_e, int _elfclass);
174 void *_libelf_ehdr(Elf *_e, int _elfclass, int _allocate);
175 int _libelf_falign(Elf_Type _t, int _elfclass);
176 size_t _libelf_fsize(Elf_Type _t, int _elfclass, unsigned int _version,
178 int (*_libelf_get_translator(Elf_Type _t, int _direction, int _elfclass))
179 (char *_dst, size_t dsz, char *_src, size_t _cnt, int _byteswap);
180 void *_libelf_getphdr(Elf *_e, int _elfclass);
181 void *_libelf_getshdr(Elf_Scn *_scn, int _elfclass);
182 void _libelf_init_elf(Elf *_e, Elf_Kind _kind);
183 int _libelf_load_scn(Elf *e, void *ehdr);
184 int _libelf_malign(Elf_Type _t, int _elfclass);
185 size_t _libelf_msize(Elf_Type _t, int _elfclass, unsigned int _version);
186 void *_libelf_newphdr(Elf *_e, int _elfclass, size_t _count);
187 Elf_Data *_libelf_release_data(Elf_Data *_d);
188 Elf *_libelf_release_elf(Elf *_e);
189 Elf_Scn *_libelf_release_scn(Elf_Scn *_s);
190 int _libelf_setphnum(Elf *_e, void *_eh, int _elfclass, size_t _phnum);
191 int _libelf_setshnum(Elf *_e, void *_eh, int _elfclass, size_t _shnum);
192 int _libelf_setshstrndx(Elf *_e, void *_eh, int _elfclass,
194 Elf_Data *_libelf_xlate(Elf_Data *_d, const Elf_Data *_s,
195 unsigned int _encoding, int _elfclass, int _direction);
196 int _libelf_xlate_shtype(uint32_t _sht);
198 #endif /* __LIBELF_H_ */