/usr/include/x86_64-linux-gnu/lttng/ust-elf.h is in liblttng-ust-dev 2.10.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 | #ifndef _LTTNG_UST_ELF_H
#define _LTTNG_UST_ELF_H
/*
* Copyright (C) 2015 Antoine Busque <abusque@efficios.com>
*
* 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 Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <byteswap.h>
#include <elf.h>
#include <lttng/ust-endian.h>
/*
* Determine native endianness in order to convert when reading an ELF
* file if there is a mismatch.
*/
#if BYTE_ORDER == LITTLE_ENDIAN
#define NATIVE_ELF_ENDIANNESS ELFDATA2LSB
#else
#define NATIVE_ELF_ENDIANNESS ELFDATA2MSB
#endif
/*
* The size in bytes of the debug link CRC as contained in an ELF
* section.
*/
#define ELF_CRC_SIZE 4
/*
* ELF notes are aligned on 4 bytes. ref: ELF specification version
* 1.1 p. 2-5.
*/
#define ELF_NOTE_ENTRY_ALIGN 4
/*
* Within an ELF note, the `desc` field is also aligned on 4
* bytes. ref: ELF specification version 1.1 p. 2-5.
*/
#define ELF_NOTE_DESC_ALIGN 4
#define bswap(x) \
do { \
switch (sizeof(x)) { \
case 8: \
x = bswap_64(x); \
break; \
case 4: \
x = bswap_32(x); \
break; \
case 2: \
x = bswap_16(x); \
break; \
case 1: \
break; \
default: \
abort(); \
} \
} while (0)
#define bswap_phdr(phdr) \
do { \
bswap((phdr).p_type); \
bswap((phdr).p_offset); \
bswap((phdr).p_filesz); \
bswap((phdr).p_memsz); \
bswap((phdr).p_align); \
bswap((phdr).p_vaddr); \
} while (0)
#define bswap_shdr(shdr) \
do { \
bswap((shdr).sh_name); \
bswap((shdr).sh_type); \
bswap((shdr).sh_flags); \
bswap((shdr).sh_addr); \
bswap((shdr).sh_offset); \
bswap((shdr).sh_size); \
bswap((shdr).sh_link); \
bswap((shdr).sh_info); \
bswap((shdr).sh_addralign); \
bswap((shdr).sh_entsize); \
} while (0)
#define bswap_ehdr(ehdr) \
do { \
bswap((ehdr).e_type); \
bswap((ehdr).e_machine); \
bswap((ehdr).e_version); \
bswap((ehdr).e_entry); \
bswap((ehdr).e_phoff); \
bswap((ehdr).e_shoff); \
bswap((ehdr).e_flags); \
bswap((ehdr).e_ehsize); \
bswap((ehdr).e_phentsize); \
bswap((ehdr).e_phnum); \
bswap((ehdr).e_shentsize); \
bswap((ehdr).e_shnum); \
bswap((ehdr).e_shstrndx); \
} while (0)
#define copy_phdr(src_phdr, dst_phdr) \
do { \
(dst_phdr).p_type = (src_phdr).p_type; \
(dst_phdr).p_offset = (src_phdr).p_offset; \
(dst_phdr).p_filesz = (src_phdr).p_filesz; \
(dst_phdr).p_memsz = (src_phdr).p_memsz; \
(dst_phdr).p_align = (src_phdr).p_align; \
(dst_phdr).p_vaddr = (src_phdr).p_vaddr; \
} while (0)
#define copy_shdr(src_shdr, dst_shdr) \
do { \
(dst_shdr).sh_name = (src_shdr).sh_name; \
(dst_shdr).sh_type = (src_shdr).sh_type; \
(dst_shdr).sh_flags = (src_shdr).sh_flags; \
(dst_shdr).sh_addr = (src_shdr).sh_addr; \
(dst_shdr).sh_offset = (src_shdr).sh_offset; \
(dst_shdr).sh_size = (src_shdr).sh_size; \
(dst_shdr).sh_link = (src_shdr).sh_link; \
(dst_shdr).sh_info = (src_shdr).sh_info; \
(dst_shdr).sh_addralign = (src_shdr).sh_addralign; \
(dst_shdr).sh_entsize = (src_shdr).sh_entsize; \
} while (0)
#define copy_ehdr(src_ehdr, dst_ehdr) \
do { \
(dst_ehdr).e_type = (src_ehdr).e_type; \
(dst_ehdr).e_machine = (src_ehdr).e_machine; \
(dst_ehdr).e_version = (src_ehdr).e_version; \
(dst_ehdr).e_entry = (src_ehdr).e_entry; \
(dst_ehdr).e_phoff = (src_ehdr).e_phoff; \
(dst_ehdr).e_shoff = (src_ehdr).e_shoff; \
(dst_ehdr).e_flags = (src_ehdr).e_flags; \
(dst_ehdr).e_ehsize = (src_ehdr).e_ehsize; \
(dst_ehdr).e_phentsize = (src_ehdr).e_phentsize; \
(dst_ehdr).e_phnum = (src_ehdr).e_phnum; \
(dst_ehdr).e_shentsize = (src_ehdr).e_shentsize; \
(dst_ehdr).e_shnum = (src_ehdr).e_shnum; \
(dst_ehdr).e_shstrndx = (src_ehdr).e_shstrndx; \
} while (0)
struct lttng_ust_elf_ehdr {
uint16_t e_type;
uint16_t e_machine;
uint32_t e_version;
uint64_t e_entry;
uint64_t e_phoff;
uint64_t e_shoff;
uint32_t e_flags;
uint16_t e_ehsize;
uint16_t e_phentsize;
uint16_t e_phnum;
uint16_t e_shentsize;
uint16_t e_shnum;
uint16_t e_shstrndx;
};
struct lttng_ust_elf_phdr {
uint32_t p_type;
uint64_t p_offset;
uint64_t p_filesz;
uint64_t p_memsz;
uint64_t p_align;
uint64_t p_vaddr;
};
struct lttng_ust_elf_shdr {
uint32_t sh_name;
uint32_t sh_type;
uint64_t sh_flags;
uint64_t sh_addr;
uint64_t sh_offset;
uint64_t sh_size;
uint32_t sh_link;
uint32_t sh_info;
uint64_t sh_addralign;
uint64_t sh_entsize;
};
struct lttng_ust_elf_nhdr {
uint32_t n_namesz;
uint32_t n_descsz;
uint32_t n_type;
};
struct lttng_ust_elf {
/* Offset in bytes to start of section names string table. */
off_t section_names_offset;
/* Size in bytes of section names string table. */
size_t section_names_size;
char *path;
int fd;
struct lttng_ust_elf_ehdr *ehdr;
uint8_t bitness;
uint8_t endianness;
};
static inline
int is_elf_32_bit(struct lttng_ust_elf *elf)
{
return elf->bitness == ELFCLASS32;
}
static inline
int is_elf_native_endian(struct lttng_ust_elf *elf)
{
return elf->endianness == NATIVE_ELF_ENDIANNESS;
}
struct lttng_ust_elf *lttng_ust_elf_create(const char *path);
void lttng_ust_elf_destroy(struct lttng_ust_elf *elf);
uint8_t lttng_ust_elf_is_pic(struct lttng_ust_elf *elf);
int lttng_ust_elf_get_memsz(struct lttng_ust_elf *elf, uint64_t *memsz);
int lttng_ust_elf_get_build_id(struct lttng_ust_elf *elf, uint8_t **build_id,
size_t *length, int *found);
int lttng_ust_elf_get_debug_link(struct lttng_ust_elf *elf, char **filename,
uint32_t *crc, int *found);
#endif /* _LTTNG_UST_ELF_H */
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