mirror of
https://github.com/zeldaret/oot.git
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58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
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/* SPDX-FileCopyrightText: Copyright (C) 2024 ZeldaRET */
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/* SPDX-License-Identifier: CC0-1.0 */
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#include <errno.h>
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#include <stdarg.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "elf32.h"
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#include "util.h"
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/**
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* Converts symbols defined in an ELF file to ABS symbols so their values remain
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* unchanged after linking against them. This is used for soundfonts as references
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* to symbols defined in the soundfont should remain file-relative even after the
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* final link.
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*/
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int
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main(int argc, char **argv)
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{
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if (argc < 3) {
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fprintf(stderr, "Usage: %s in.elf out.elf\n", argv[0]);
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return EXIT_FAILURE;
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}
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// read input elf file
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size_t data_size;
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void *data = elf32_read(argv[1], &data_size);
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// locate symtab
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Elf32_Shdr *symtab = elf32_get_symtab(data, data_size);
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if (symtab == NULL)
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error("Symtab not found");
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uint32_t sh_offset = elf32_read32(symtab->sh_offset);
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uint32_t sh_size = elf32_read32(symtab->sh_size);
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// patch defined symbols to be ABS
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Elf32_Sym *sym = GET_PTR(data, sh_offset);
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Elf32_Sym *sym_end = GET_PTR(data, sh_offset + sh_size);
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for (size_t i = 0; sym < sym_end; sym++, i++) {
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validate_read(sh_offset + i * sizeof(Elf32_Sym), sizeof(Elf32_Sym), data_size);
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if (elf32_read16(sym->st_shndx) != SHN_UND)
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sym->st_shndx = elf32_write16(SHN_ABS);
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}
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// write output elf file
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util_write_whole_file(argv[2], data, data_size);
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return EXIT_SUCCESS;
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}
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