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/*
* libpulp - User-space Livepatching Library
*
* Copyright (C) 2024 SUSE Software Solutions GmbH
*
* This file is part of libpulp.
*
* libpulp 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.
*
* libpulp 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 General Public License
* along with libpulp. If not, see <http://www.gnu.org/licenses/>.
*/
/* Small parser for elf, not depending on larger libraries such as libelf
* and with very small memory footprint. No allocation on the heap is done
* in this library.
*/
/* This file is not needed if we are compiling without gdb interface. */
#ifdef ENABLE_GDB_INTERFACE
#include <elf.h>
/** Maximum size of the Section String Table. */
#define STRTBL_SIZE_MAX 0x500
/** Typedefs so we can adjust according to architecture. */
typedef Elf64_Ehdr Elf_Ehdr;
typedef Elf64_Shdr Elf_Shdr;
typedef Elf64_Half Elf_Half;
typedef Elf64_Off Elf_Off;
/** Read the Elf File Header. */
Elf_Ehdr *Elf_Parse_Ehdr(Elf_Ehdr *ehdr, int fd);
/** Get an ELF section by its name.
*
* OBS: use `readelf -S <file>` to show section names.
*/
Elf_Shdr *Elf_Get_Shdr_By_Name(Elf_Shdr *shdr, const char *name, int fd,
const Elf_Ehdr *ehdr, const char strtbl[]);
/** Get an ELF section by its index.
*
* OBS: use `readelf -S <file>` to show section index [<idx>].
*/
Elf_Shdr *Elf_Get_Shdr(Elf_Shdr *shdr, Elf_Half index,
int fd, const Elf_Ehdr *ehdr);
/** Get the section string table. */
long Elf_Load_Strtbl(char strtbl[STRTBL_SIZE_MAX], const Elf_Ehdr *ehdr, int fd);
/** Load Section into `dest` buffer. */
long Elf_Load_Section(unsigned dest_size, unsigned char *dest,
const Elf_Shdr *shdr, int fd);
/** ----- ELF functions related to ULP ----- . */
/** Get the .ulp section from the given ELF file. */
long Get_ULP_Section(unsigned dest_size, unsigned char *dest, const char *file);
/** Get the .ulp.rev section from the given ELF file. */
long Get_ULP_REV_Section(unsigned dest_size, unsigned char *dest, const char *file);
#endif //ENABLE_GDB_INTERFACE
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