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/* Copyright 2013-2014 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __SYM_FILE_LOADER__
#define __SYM_FILE_LOADER__
#include <inttypes.h>
#include <ansidecl.h>
#include <elf/common.h>
#include <elf/external.h>
#ifdef TARGET_LP64
typedef Elf64_External_Phdr Elf_External_Phdr;
typedef Elf64_External_Ehdr Elf_External_Ehdr;
typedef Elf64_External_Shdr Elf_External_Shdr;
typedef Elf64_External_Sym Elf_External_Sym;
typedef uint64_t Elf_Addr;
#elif defined TARGET_ILP32
typedef Elf32_External_Phdr Elf_External_Phdr;
typedef Elf32_External_Ehdr Elf_External_Ehdr;
typedef Elf32_External_Shdr Elf_External_Shdr;
typedef Elf32_External_Sym Elf_External_Sym;
typedef uint32_t Elf_Addr;
#endif
#define GET(hdr, field) (\
sizeof ((hdr)->field) == 1 ? (uint64_t) (hdr)->field[0] : \
sizeof ((hdr)->field) == 2 ? (uint64_t) *(uint16_t *) (hdr)->field : \
sizeof ((hdr)->field) == 4 ? (uint64_t) *(uint32_t *) (hdr)->field : \
sizeof ((hdr)->field) == 8 ? *(uint64_t *) (hdr)->field : \
*(uint64_t *) NULL)
#define GETADDR(hdr, field) (\
sizeof ((hdr)->field) == sizeof (Elf_Addr) ? *(Elf_Addr *) (hdr)->field : \
*(Elf_Addr *) NULL)
struct segment
{
uint8_t *mapped_addr;
Elf_External_Phdr *phdr;
struct segment *next;
};
/* Mini shared library loader. No reallocation is performed
for the sake of simplicity. */
int
load_shlib (const char *file, Elf_External_Ehdr **ehdr_out,
struct segment **seg_out);
/* Return the section-header table. */
Elf_External_Shdr *find_shdrtab (Elf_External_Ehdr *ehdr);
/* Return the string table of the section headers. */
const char *find_shstrtab (Elf_External_Ehdr *ehdr, uint64_t *size);
/* Return the string table named SECTION. */
const char *find_strtab (Elf_External_Ehdr *ehdr,
const char *section, uint64_t *strtab_size);
/* Return the section header named SECTION. */
Elf_External_Shdr *find_shdr (Elf_External_Ehdr *ehdr, const char *section);
/* Return the symbol table. */
Elf_External_Sym *find_symtab (Elf_External_Ehdr *ehdr,
uint64_t *symtab_size);
/* Translate a file offset to an address in a loaded segment. */
int translate_offset (uint64_t file_offset, struct segment *seg, void **addr);
/* Lookup the address of FUNC. */
int
lookup_function (const char *func, Elf_External_Ehdr* ehdr,
struct segment *seg, void **addr);
#endif
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