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65fc1697db
With some old toolchain not all values should be available that's why better to define all of them to avoid compilation issues. Signed-off-by: Michal Simek <michal.simek@amd.com> Link: https://lore.kernel.org/r/e2a66854c5506100eb82b5b33cec7f0b5fca1008.1657260903.git.michal.simek@amd.com
678 lines
15 KiB
C
678 lines
15 KiB
C
// SPDX-License-Identifier: GPL-2.0+ OR BSD-2-Clause
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/*
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* Copyright 2013 Freescale Semiconductor, Inc.
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*
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* 64-bit and little-endian target only until we need to support a different
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* arch that needs this.
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*/
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#include <elf.h>
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#include <errno.h>
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#include <inttypes.h>
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#include <stdarg.h>
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#include <stdbool.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 "compiler.h"
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#ifndef EM_AARCH64
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#define EM_AARCH64 183
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#endif
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#ifndef R_AARCH64_RELATIVE
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#define R_AARCH64_RELATIVE 1027
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#endif
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#ifndef EM_MICROBLAZE
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#define EM_MICROBLAZE 189
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#endif
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#ifndef R_MICROBLAZE_NONE
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#define R_MICROBLAZE_NONE 0
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#endif
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#ifndef R_MICROBLAZE_32
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#define R_MICROBLAZE_32 1
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#endif
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#ifndef R_MICROBLAZE_REL
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#define R_MICROBLAZE_REL 16
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#endif
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#ifndef R_MICROBLAZE_GLOB_DAT
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#define R_MICROBLAZE_GLOB_DAT 18
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#endif
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static int ei_class;
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static uint64_t rela_start, rela_end, text_base, dyn_start;
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static const bool debug_en;
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static void debug(const char *fmt, ...)
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{
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va_list args;
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if (debug_en) {
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va_start(args, fmt);
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vprintf(fmt, args);
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va_end(args);
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}
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}
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static bool supported_rela(Elf64_Rela *rela)
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{
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uint64_t mask = 0xffffffffULL; /* would be different on 32-bit */
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uint32_t type = rela->r_info & mask;
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switch (type) {
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case R_AARCH64_RELATIVE:
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return true;
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default:
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fprintf(stderr, "warning: unsupported relocation type %"
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PRIu32 " at %" PRIx64 "\n",
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type, rela->r_offset);
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return false;
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}
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}
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static int decode_elf64(FILE *felf, char **argv)
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{
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size_t size;
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Elf64_Ehdr header;
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uint64_t section_header_base, section_header_size;
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uint64_t sh_addr, sh_offset, sh_size;
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Elf64_Half sh_index, sh_num;
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Elf64_Shdr *sh_table; /* Elf symbol table */
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int ret, i, machine;
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char *sh_str;
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debug("64bit version\n");
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/* Make sure we are at start */
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rewind(felf);
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size = fread(&header, 1, sizeof(header), felf);
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if (size != sizeof(header)) {
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fclose(felf);
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return 25;
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}
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machine = le16_to_cpu(header.e_machine);
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debug("Machine\t%d\n", machine);
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if (machine != EM_AARCH64) {
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fprintf(stderr, "%s: Not supported machine type\n", argv[0]);
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return 30;
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}
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text_base = le64_to_cpu(header.e_entry);
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section_header_base = le64_to_cpu(header.e_shoff);
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section_header_size = le16_to_cpu(header.e_shentsize) *
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le16_to_cpu(header.e_shnum);
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sh_table = malloc(section_header_size);
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if (!sh_table) {
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fprintf(stderr, "%s: Cannot allocate space for section header\n",
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argv[0]);
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fclose(felf);
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return 26;
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}
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ret = fseek(felf, section_header_base, SEEK_SET);
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if (ret) {
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fprintf(stderr, "%s: Can't set pointer to section header: %x/%lx\n",
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argv[0], ret, section_header_base);
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free(sh_table);
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fclose(felf);
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return 26;
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}
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size = fread(sh_table, 1, section_header_size, felf);
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if (size != section_header_size) {
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fprintf(stderr, "%s: Can't read section header: %lx/%lx\n",
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argv[0], size, section_header_size);
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free(sh_table);
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fclose(felf);
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return 27;
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}
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sh_index = le16_to_cpu(header.e_shstrndx);
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sh_size = le64_to_cpu(sh_table[sh_index].sh_size);
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debug("e_shstrndx %x, sh_size %lx\n", sh_index, sh_size);
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sh_str = malloc(sh_size);
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if (!sh_str) {
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fprintf(stderr, "malloc failed\n");
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free(sh_table);
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fclose(felf);
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return 28;
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}
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/*
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* Specifies the byte offset from the beginning of the file
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* to the first byte in the section.
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*/
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sh_offset = le64_to_cpu(sh_table[sh_index].sh_offset);
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sh_num = le16_to_cpu(header.e_shnum);
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ret = fseek(felf, sh_offset, SEEK_SET);
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if (ret) {
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fprintf(stderr, "Setting up sh_offset failed\n");
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free(sh_str);
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free(sh_table);
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fclose(felf);
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return 29;
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}
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size = fread(sh_str, 1, sh_size, felf);
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if (size != sh_size) {
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fprintf(stderr, "%s: Can't read section: %lx/%lx\n",
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argv[0], size, sh_size);
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free(sh_str);
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free(sh_table);
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fclose(felf);
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return 30;
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}
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for (i = 0; i < sh_num; i++) {
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char *sh_name = sh_str + le32_to_cpu(sh_table[i].sh_name);
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debug("%s\n", sh_name);
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sh_addr = le64_to_cpu(sh_table[i].sh_addr);
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sh_offset = le64_to_cpu(sh_table[i].sh_offset);
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sh_size = le64_to_cpu(sh_table[i].sh_size);
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if (!strcmp(".rela.dyn", sh_name)) {
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debug("Found section\t\".rela_dyn\"\n");
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debug(" at addr\t0x%08x\n", sh_addr);
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debug(" at offset\t0x%08x\n", sh_offset);
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debug(" of size\t0x%08x\n", sh_size);
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rela_start = sh_addr;
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rela_end = rela_start + sh_size;
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break;
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}
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}
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/* Clean up */
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free(sh_str);
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free(sh_table);
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fclose(felf);
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debug("text_base\t0x%08lx\n", text_base);
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debug("rela_start\t0x%08lx\n", rela_start);
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debug("rela_end\t0x%08lx\n", rela_end);
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if (!rela_start)
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return 1;
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return 0;
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}
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static int decode_elf32(FILE *felf, char **argv)
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{
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size_t size;
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Elf32_Ehdr header;
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uint64_t section_header_base, section_header_size;
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uint32_t sh_addr, sh_offset, sh_size;
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Elf32_Half sh_index, sh_num;
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Elf32_Shdr *sh_table; /* Elf symbol table */
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int ret, i, machine;
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char *sh_str;
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debug("32bit version\n");
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/* Make sure we are at start */
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rewind(felf);
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size = fread(&header, 1, sizeof(header), felf);
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if (size != sizeof(header)) {
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fclose(felf);
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return 25;
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}
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machine = le16_to_cpu(header.e_machine);
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debug("Machine %d\n", machine);
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if (machine != EM_MICROBLAZE) {
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fprintf(stderr, "%s: Not supported machine type\n", argv[0]);
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return 30;
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}
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text_base = le32_to_cpu(header.e_entry);
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section_header_base = le32_to_cpu(header.e_shoff);
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section_header_size = le16_to_cpu(header.e_shentsize) *
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le16_to_cpu(header.e_shnum);
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sh_table = malloc(section_header_size);
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if (!sh_table) {
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fprintf(stderr, "%s: Cannot allocate space for section header\n",
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argv[0]);
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fclose(felf);
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return 26;
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}
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ret = fseek(felf, section_header_base, SEEK_SET);
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if (ret) {
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fprintf(stderr, "%s: Can't set pointer to section header: %x/%lx\n",
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argv[0], ret, section_header_base);
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free(sh_table);
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fclose(felf);
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return 26;
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}
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size = fread(sh_table, 1, section_header_size, felf);
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if (size != section_header_size) {
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fprintf(stderr, "%s: Can't read section header: %lx/%lx\n",
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argv[0], size, section_header_size);
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free(sh_table);
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fclose(felf);
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return 27;
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}
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sh_index = le16_to_cpu(header.e_shstrndx);
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sh_size = le32_to_cpu(sh_table[sh_index].sh_size);
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debug("e_shstrndx %x, sh_size %lx\n", sh_index, sh_size);
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sh_str = malloc(sh_size);
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if (!sh_str) {
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fprintf(stderr, "malloc failed\n");
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free(sh_table);
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fclose(felf);
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return 28;
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}
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/*
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* Specifies the byte offset from the beginning of the file
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* to the first byte in the section.
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*/
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sh_offset = le32_to_cpu(sh_table[sh_index].sh_offset);
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sh_num = le16_to_cpu(header.e_shnum);
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ret = fseek(felf, sh_offset, SEEK_SET);
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if (ret) {
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fprintf(stderr, "Setting up sh_offset failed\n");
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free(sh_str);
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free(sh_table);
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fclose(felf);
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return 29;
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}
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size = fread(sh_str, 1, sh_size, felf);
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if (size != sh_size) {
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fprintf(stderr, "%s: Can't read section: %lx/%x\n",
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argv[0], size, sh_size);
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free(sh_str);
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free(sh_table);
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fclose(felf);
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return 30;
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}
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for (i = 0; i < sh_num; i++) {
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char *sh_name = sh_str + le32_to_cpu(sh_table[i].sh_name);
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debug("%s\n", sh_name);
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sh_addr = le64_to_cpu(sh_table[i].sh_addr);
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sh_offset = le64_to_cpu(sh_table[i].sh_offset);
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sh_size = le64_to_cpu(sh_table[i].sh_size);
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if (!strcmp(".rela.dyn", sh_name)) {
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debug("Found section\t\".rela_dyn\"\n");
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debug(" at addr\t0x%08x\n", sh_addr);
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debug(" at offset\t0x%08x\n", sh_offset);
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debug(" of size\t0x%08x\n", sh_size);
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rela_start = sh_addr;
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rela_end = rela_start + sh_size;
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}
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if (!strcmp(".dynsym", sh_name)) {
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debug("Found section\t\".dynsym\"\n");
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debug(" at addr\t0x%08x\n", sh_addr);
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debug(" at offset\t0x%08x\n", sh_offset);
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debug(" of size\t0x%08x\n", sh_size);
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dyn_start = sh_addr;
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}
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}
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/* Clean up */
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free(sh_str);
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free(sh_table);
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fclose(felf);
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debug("text_base\t0x%08lx\n", text_base);
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debug("rela_start\t0x%08lx\n", rela_start);
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debug("rela_end\t0x%08lx\n", rela_end);
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debug("dyn_start\t0x%08lx\n", dyn_start);
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if (!rela_start)
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return 1;
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return 0;
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}
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static int decode_elf(char **argv)
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{
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FILE *felf;
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size_t size;
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unsigned char e_ident[EI_NIDENT];
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felf = fopen(argv[2], "r+b");
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if (!felf) {
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fprintf(stderr, "%s: Cannot open %s: %s\n",
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argv[0], argv[5], strerror(errno));
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return 2;
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}
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size = fread(e_ident, 1, EI_NIDENT, felf);
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if (size != EI_NIDENT) {
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fclose(felf);
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return 25;
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}
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/* Check if this is really ELF file */
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if (e_ident[0] != 0x7f &&
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e_ident[1] != 'E' &&
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e_ident[2] != 'L' &&
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e_ident[3] != 'F') {
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fclose(felf);
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return 1;
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}
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ei_class = e_ident[4];
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debug("EI_CLASS(1=32bit, 2=64bit) %d\n", ei_class);
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if (ei_class == 2)
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return decode_elf64(felf, argv);
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return decode_elf32(felf, argv);
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}
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static int rela_elf64(char **argv, FILE *f)
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{
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int i, num;
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if ((rela_end - rela_start) % sizeof(Elf64_Rela)) {
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fprintf(stderr, "%s: rela size isn't a multiple of Elf64_Rela\n", argv[0]);
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return 3;
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}
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num = (rela_end - rela_start) / sizeof(Elf64_Rela);
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for (i = 0; i < num; i++) {
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Elf64_Rela rela, swrela;
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uint64_t pos = rela_start + sizeof(Elf64_Rela) * i;
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uint64_t addr;
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if (fseek(f, pos, SEEK_SET) < 0) {
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fprintf(stderr, "%s: %s: seek to %" PRIx64
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" failed: %s\n",
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argv[0], argv[1], pos, strerror(errno));
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}
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if (fread(&rela, sizeof(rela), 1, f) != 1) {
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fprintf(stderr, "%s: %s: read rela failed at %"
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PRIx64 "\n",
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argv[0], argv[1], pos);
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return 4;
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}
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swrela.r_offset = le64_to_cpu(rela.r_offset);
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swrela.r_info = le64_to_cpu(rela.r_info);
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swrela.r_addend = le64_to_cpu(rela.r_addend);
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if (!supported_rela(&swrela))
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continue;
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debug("Rela %" PRIx64 " %" PRIu64 " %" PRIx64 "\n",
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swrela.r_offset, swrela.r_info, swrela.r_addend);
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if (swrela.r_offset < text_base) {
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fprintf(stderr, "%s: %s: bad rela at %" PRIx64 "\n",
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argv[0], argv[1], pos);
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return 4;
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}
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addr = swrela.r_offset - text_base;
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if (fseek(f, addr, SEEK_SET) < 0) {
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fprintf(stderr, "%s: %s: seek to %"
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PRIx64 " failed: %s\n",
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argv[0], argv[1], addr, strerror(errno));
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}
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if (fwrite(&rela.r_addend, sizeof(rela.r_addend), 1, f) != 1) {
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fprintf(stderr, "%s: %s: write failed at %" PRIx64 "\n",
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argv[0], argv[1], addr);
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return 4;
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}
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}
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return 0;
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}
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static bool supported_rela32(Elf32_Rela *rela, uint32_t *type)
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{
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uint32_t mask = 0xffULL; /* would be different on 32-bit */
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*type = rela->r_info & mask;
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debug("Type:\t");
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switch (*type) {
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case R_MICROBLAZE_32:
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debug("R_MICROBLAZE_32\n");
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return true;
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case R_MICROBLAZE_GLOB_DAT:
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debug("R_MICROBLAZE_GLOB_DAT\n");
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return true;
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case R_MICROBLAZE_NONE:
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debug("R_MICROBLAZE_NONE - ignoring - do nothing\n");
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return false;
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case R_MICROBLAZE_REL:
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debug("R_MICROBLAZE_REL\n");
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return true;
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default:
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fprintf(stderr, "warning: unsupported relocation type %"
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PRIu32 " at %" PRIx32 "\n", *type, rela->r_offset);
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return false;
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}
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}
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static int rela_elf32(char **argv, FILE *f)
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{
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int i, num, index;
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uint32_t value, type;
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if ((rela_end - rela_start) % sizeof(Elf32_Rela)) {
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fprintf(stderr, "%s: rela size isn't a multiple of Elf32_Rela\n", argv[0]);
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return 3;
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}
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num = (rela_end - rela_start) / sizeof(Elf32_Rela);
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debug("Number of entries: %u\n", num);
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for (i = 0; i < num; i++) {
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Elf32_Rela rela, swrela;
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Elf32_Sym symbols;
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uint32_t pos = rela_start + sizeof(Elf32_Rela) * i;
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uint32_t addr, pos_dyn;
|
|
|
|
debug("\nPossition:\t%d/0x%x\n", i, pos);
|
|
|
|
if (fseek(f, pos, SEEK_SET) < 0) {
|
|
fprintf(stderr, "%s: %s: seek to %" PRIx32
|
|
" failed: %s\n",
|
|
argv[0], argv[1], pos, strerror(errno));
|
|
}
|
|
|
|
if (fread(&rela, sizeof(rela), 1, f) != 1) {
|
|
fprintf(stderr, "%s: %s: read rela failed at %"
|
|
PRIx32 "\n",
|
|
argv[0], argv[1], pos);
|
|
return 4;
|
|
}
|
|
|
|
debug("Rela:\toffset:\t%" PRIx32 " r_info:\t%"
|
|
PRIu32 " r_addend:\t%" PRIx32 "\n",
|
|
rela.r_offset, rela.r_info, rela.r_addend);
|
|
|
|
swrela.r_offset = le32_to_cpu(rela.r_offset);
|
|
swrela.r_info = le32_to_cpu(rela.r_info);
|
|
swrela.r_addend = le32_to_cpu(rela.r_addend);
|
|
|
|
debug("SWRela:\toffset:\t%" PRIx32 " r_info:\t%"
|
|
PRIu32 " r_addend:\t%" PRIx32 "\n",
|
|
swrela.r_offset, swrela.r_info, swrela.r_addend);
|
|
|
|
if (!supported_rela32(&swrela, &type))
|
|
continue;
|
|
|
|
if (swrela.r_offset < text_base) {
|
|
fprintf(stderr, "%s: %s: bad rela at %" PRIx32 "\n",
|
|
argv[0], argv[1], pos);
|
|
return 4;
|
|
}
|
|
|
|
addr = swrela.r_offset - text_base;
|
|
|
|
debug("Addr:\t0x%" PRIx32 "\n", addr);
|
|
|
|
switch (type) {
|
|
case R_MICROBLAZE_REL:
|
|
if (fseek(f, addr, SEEK_SET) < 0) {
|
|
fprintf(stderr, "%s: %s: seek to %"
|
|
PRIx32 " failed: %s\n",
|
|
argv[0], argv[1], addr, strerror(errno));
|
|
return 5;
|
|
}
|
|
|
|
debug("Write addend\n");
|
|
|
|
if (fwrite(&rela.r_addend, sizeof(rela.r_addend), 1, f) != 1) {
|
|
fprintf(stderr, "%s: %s: write failed at %" PRIx32 "\n",
|
|
argv[0], argv[1], addr);
|
|
return 4;
|
|
}
|
|
break;
|
|
case R_MICROBLAZE_32:
|
|
case R_MICROBLAZE_GLOB_DAT:
|
|
/* global symbols read it and add reloc offset */
|
|
index = swrela.r_info >> 8;
|
|
pos_dyn = dyn_start + sizeof(Elf32_Sym) * index;
|
|
|
|
debug("Index:\t%d\n", index);
|
|
debug("Pos_dyn:\t0x%x\n", pos_dyn);
|
|
|
|
if (fseek(f, pos_dyn, SEEK_SET) < 0) {
|
|
fprintf(stderr, "%s: %s: seek to %"
|
|
PRIx32 " failed: %s\n",
|
|
argv[0], argv[1], pos_dyn, strerror(errno));
|
|
return 5;
|
|
}
|
|
|
|
if (fread(&symbols, sizeof(symbols), 1, f) != 1) {
|
|
fprintf(stderr, "%s: %s: read symbols failed at %"
|
|
PRIx32 "\n",
|
|
argv[0], argv[1], pos_dyn);
|
|
return 4;
|
|
}
|
|
|
|
debug("Symbol description:\n");
|
|
debug(" st_name:\t0x%x\n", symbols.st_name);
|
|
debug(" st_value:\t0x%x\n", symbols.st_value);
|
|
debug(" st_size:\t0x%x\n", symbols.st_size);
|
|
|
|
value = swrela.r_addend + symbols.st_value;
|
|
|
|
debug("Value:\t0x%x\n", value);
|
|
|
|
if (fseek(f, addr, SEEK_SET) < 0) {
|
|
fprintf(stderr, "%s: %s: seek to %"
|
|
PRIx32 " failed: %s\n",
|
|
argv[0], argv[1], addr, strerror(errno));
|
|
return 5;
|
|
}
|
|
|
|
if (fwrite(&value, sizeof(rela.r_addend), 1, f) != 1) {
|
|
fprintf(stderr, "%s: %s: write failed at %" PRIx32 "\n",
|
|
argv[0], argv[1], addr);
|
|
return 4;
|
|
}
|
|
|
|
break;
|
|
case R_MICROBLAZE_NONE:
|
|
debug("R_MICROBLAZE_NONE - skip\n");
|
|
break;
|
|
default:
|
|
fprintf(stderr, "warning: unsupported relocation type %"
|
|
PRIu32 " at %" PRIx32 "\n",
|
|
type, rela.r_offset);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
FILE *f;
|
|
int ret;
|
|
uint64_t file_size;
|
|
|
|
if (argc != 3) {
|
|
fprintf(stderr, "Statically apply ELF rela relocations\n");
|
|
fprintf(stderr, "Usage: %s <bin file> <u-boot ELF>\n",
|
|
argv[0]);
|
|
return 1;
|
|
}
|
|
|
|
ret = decode_elf(argv);
|
|
if (ret) {
|
|
fprintf(stderr, "ELF decoding failed\n");
|
|
return ret;
|
|
}
|
|
|
|
if (rela_start > rela_end || rela_start < text_base) {
|
|
fprintf(stderr, "%s: bad rela bounds\n", argv[0]);
|
|
return 3;
|
|
}
|
|
|
|
rela_start -= text_base;
|
|
rela_end -= text_base;
|
|
dyn_start -= text_base;
|
|
|
|
f = fopen(argv[1], "r+b");
|
|
if (!f) {
|
|
fprintf(stderr, "%s: Cannot open %s: %s\n",
|
|
argv[0], argv[1], strerror(errno));
|
|
return 2;
|
|
}
|
|
|
|
fseek(f, 0, SEEK_END);
|
|
file_size = ftell(f);
|
|
rewind(f);
|
|
|
|
if (rela_end > file_size) {
|
|
// Most likely compiler inserted some section that didn't get
|
|
// objcopy-ed into the final binary
|
|
rela_end = file_size;
|
|
}
|
|
|
|
if (ei_class == 2)
|
|
ret = rela_elf64(argv, f);
|
|
else
|
|
ret = rela_elf32(argv, f);
|
|
|
|
if (fclose(f) < 0) {
|
|
fprintf(stderr, "%s: %s: close failed: %s\n",
|
|
argv[0], argv[1], strerror(errno));
|
|
return 4;
|
|
}
|
|
|
|
return ret;
|
|
}
|