cosmopolitan/libc/elf/getelfsectionbyaddress.c

38 lines
2.4 KiB
C

/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ 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; version 2 of the License. │
│ │
│ 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, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/elf/def.h"
#include "libc/elf/elf.h"
Elf64_Shdr *getelfsectionbyaddress(const Elf64_Ehdr *elf, size_t mapsize,
void *addr) {
Elf64_Half i;
Elf64_Shdr *shdr;
if (elf) {
for (i = elf->e_shnum; i > 0; --i) {
shdr = getelfsectionheaderaddress(elf, mapsize, i - 1);
if ((intptr_t)addr >= shdr->sh_addr &&
(intptr_t)addr < shdr->sh_addr + shdr->sh_size) {
return shdr;
}
}
}
return NULL;
}