34 lines
2.4 KiB
C
34 lines
2.4 KiB
C
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/*-*- 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 2020 Justine Alexandra Roberts Tunney │
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│ │
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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; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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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, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/str/str.h"
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#include "tool/build/lib/elfwriter.h"
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void elfwriter_yoink(struct ElfWriter *elf, const char *symbol) {
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unsigned char *p;
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struct ElfWriterSymRef sym;
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const unsigned char nopl[8] = "\x0f\x1f\x04\x25\x00\x00\x00\x00";
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p = elfwriter_reserve(elf, 8);
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memcpy(p, nopl, sizeof(nopl));
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sym = elfwriter_linksym(elf, symbol, ELF64_ST_INFO(STB_GLOBAL, STT_OBJECT),
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STV_HIDDEN);
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elfwriter_appendrela(elf, sizeof(nopl) - 4, sym, R_X86_64_32, 0);
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elfwriter_commit(elf, sizeof(nopl));
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}
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