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https://github.com/jart/cosmopolitan.git
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6843150e0c
This change also incorporates more bug fixes and improvements to a wide variety of small things. For example this fixes #860 so Windows console doesn't get corrupted after exit. An system stack memory map issue with aarch64 has been fixed. We no longer use O_NONBLOCK on AF_UNIX sockets. Crash reports on Arm64 will now demangle C++ symbols, even when c++filt isn't available. Most importantly the Apple M1 version of APE Loader is brought up to date by this change. A prebuilt unsigned binary for it is being included in build/bootstrap/. One more thing: retrieving the term dimensions under --strace was causing the stack to become corrupted and now that's been solved too. PSS: We're now including an ELF PT_NOTE for APE in the binaries we build, that has the APE Loader version.
46 lines
2.6 KiB
C
46 lines
2.6 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2023 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/elf/elf.h"
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#include "libc/elf/struct/ehdr.h"
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#include "libc/elf/struct/shdr.h"
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#include "libc/str/str.h"
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/**
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* Returns ELF section header for section with name.
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*
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* @param elf points to the start of the executable image data
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* @param mapsize is the number of bytes past `elf` we can access
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* @return pointer to section header within image, or null
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*/
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Elf64_Shdr *FindElfSectionByName(Elf64_Ehdr *elf, size_t mapsize,
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char *shdrstrtab, const char *name) {
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long i;
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Elf64_Shdr *shdr;
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const char *secname;
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if (shdrstrtab) {
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for (i = 0; i < elf->e_shnum; ++i) {
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if ((shdr = GetElfSectionHeaderAddress(elf, mapsize, i)) &&
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(secname = GetElfString(elf, mapsize, shdrstrtab, shdr->sh_name)) &&
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!strcmp(name, secname)) {
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return shdr;
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}
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}
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}
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return 0;
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}
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