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100 lines
2.9 KiB
C
100 lines
2.9 KiB
C
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/* Copyright 2013 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __SYM_FILE_LOADER__
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#define __SYM_FILE_LOADER__
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#include <inttypes.h>
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#include <ansidecl.h>
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#include <elf/common.h>
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#include <elf/external.h>
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#ifdef TARGET_LP64
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typedef Elf64_External_Phdr Elf_External_Phdr;
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typedef Elf64_External_Ehdr Elf_External_Ehdr;
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typedef Elf64_External_Shdr Elf_External_Shdr;
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typedef Elf64_External_Sym Elf_External_Sym;
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typedef uint64_t Elf_Addr;
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#elif defined TARGET_ILP32
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typedef Elf32_External_Phdr Elf_External_Phdr;
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typedef Elf32_External_Ehdr Elf_External_Ehdr;
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typedef Elf32_External_Shdr Elf_External_Shdr;
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typedef Elf32_External_Sym Elf_External_Sym;
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typedef uint32_t Elf_Addr;
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#endif
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#define GET(hdr, field) (\
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sizeof ((hdr)->field) == 1 ? (uint64_t) (hdr)->field[0] : \
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sizeof ((hdr)->field) == 2 ? (uint64_t) *(uint16_t *) (hdr)->field : \
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sizeof ((hdr)->field) == 4 ? (uint64_t) *(uint32_t *) (hdr)->field : \
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sizeof ((hdr)->field) == 8 ? *(uint64_t *) (hdr)->field : \
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*(uint64_t *) NULL)
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#define GETADDR(hdr, field) (\
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sizeof ((hdr)->field) == sizeof (Elf_Addr) ? *(Elf_Addr *) (hdr)->field : \
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*(Elf_Addr *) NULL)
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struct segment
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{
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uint8_t *mapped_addr;
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Elf_External_Phdr *phdr;
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struct segment *next;
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};
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/* Mini shared library loader. No reallocation is performed
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for the sake of simplicity. */
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int
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load_shlib (const char *file, Elf_External_Ehdr **ehdr_out,
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struct segment **seg_out);
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/* Return the section-header table. */
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Elf_External_Shdr *find_shdrtab (Elf_External_Ehdr *ehdr);
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/* Return the string table of the section headers. */
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const char *find_shstrtab (Elf_External_Ehdr *ehdr, uint64_t *size);
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/* Return the string table named SECTION. */
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const char *find_strtab (Elf_External_Ehdr *ehdr,
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const char *section, uint64_t *strtab_size);
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/* Return the section header named SECTION. */
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Elf_External_Shdr *find_shdr (Elf_External_Ehdr *ehdr, const char *section);
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/* Return the symbol table. */
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Elf_External_Sym *find_symtab (Elf_External_Ehdr *ehdr,
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uint64_t *symtab_size);
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/* Translate a file offset to an address in a loaded segment. */
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int translate_offset (uint64_t file_offset, struct segment *seg, void **addr);
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/* Lookup the address of FUNC. */
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int
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lookup_function (const char *func, Elf_External_Ehdr* ehdr,
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struct segment *seg, void **addr);
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#endif
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