u-boot/tools/relocate-rela.c
Tom Rini 4549e789c1 SPDX: Convert all of our multiple license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have multiple licenses (in
these cases, dual license) declared in the SPDX-License-Identifier tag.
In this case we change from listing "LICENSE-A LICENSE-B" or "LICENSE-A
or LICENSE-B" or "(LICENSE-A OR LICENSE-B)" to "LICENSE-A OR LICENSE-B"
as per the Linux Kernel style document.  Note that parenthesis are
allowed so when they were used before we continue to use them.

Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 10:24:31 -04:00

158 lines
3.4 KiB
C

// SPDX-License-Identifier: GPL-2.0+ OR BSD-2-Clause
/*
* Copyright 2013 Freescale Semiconductor, Inc.
*
* 64-bit and little-endian target only until we need to support a different
* arch that needs this.
*/
#include <elf.h>
#include <errno.h>
#include <inttypes.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "compiler.h"
#ifndef R_AARCH64_RELATIVE
#define R_AARCH64_RELATIVE 1027
#endif
static const bool debug_en;
static void debug(const char *fmt, ...)
{
va_list args;
if (debug_en) {
va_start(args, fmt);
vprintf(fmt, args);
va_end(args);
}
}
static bool supported_rela(Elf64_Rela *rela)
{
uint64_t mask = 0xffffffffULL; /* would be different on 32-bit */
uint32_t type = rela->r_info & mask;
switch (type) {
#ifdef R_AARCH64_RELATIVE
case R_AARCH64_RELATIVE:
return true;
#endif
default:
fprintf(stderr, "warning: unsupported relocation type %"
PRIu32 " at %" PRIx64 "\n",
type, rela->r_offset);
return false;
}
}
static bool read_num(const char *str, uint64_t *num)
{
char *endptr;
*num = strtoull(str, &endptr, 16);
return str[0] && !endptr[0];
}
int main(int argc, char **argv)
{
FILE *f;
int i, num;
uint64_t rela_start, rela_end, text_base;
if (argc != 5) {
fprintf(stderr, "Statically apply ELF rela relocations\n");
fprintf(stderr, "Usage: %s <bin file> <text base> " \
"<rela start> <rela end>\n", argv[0]);
fprintf(stderr, "All numbers in hex.\n");
return 1;
}
f = fopen(argv[1], "r+b");
if (!f) {
fprintf(stderr, "%s: Cannot open %s: %s\n",
argv[0], argv[1], strerror(errno));
return 2;
}
if (!read_num(argv[2], &text_base) ||
!read_num(argv[3], &rela_start) ||
!read_num(argv[4], &rela_end)) {
fprintf(stderr, "%s: bad number\n", argv[0]);
return 3;
}
if (rela_start > rela_end || rela_start < text_base ||
(rela_end - rela_start) % sizeof(Elf64_Rela)) {
fprintf(stderr, "%s: bad rela bounds\n", argv[0]);
return 3;
}
rela_start -= text_base;
rela_end -= text_base;
num = (rela_end - rela_start) / sizeof(Elf64_Rela);
for (i = 0; i < num; i++) {
Elf64_Rela rela, swrela;
uint64_t pos = rela_start + sizeof(Elf64_Rela) * i;
uint64_t addr;
if (fseek(f, pos, SEEK_SET) < 0) {
fprintf(stderr, "%s: %s: seek to %" PRIx64
" 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 %"
PRIx64 "\n",
argv[0], argv[1], pos);
return 4;
}
swrela.r_offset = cpu_to_le64(rela.r_offset);
swrela.r_info = cpu_to_le64(rela.r_info);
swrela.r_addend = cpu_to_le64(rela.r_addend);
if (!supported_rela(&swrela))
continue;
debug("Rela %" PRIx64 " %" PRIu64 " %" PRIx64 "\n",
swrela.r_offset, swrela.r_info, swrela.r_addend);
if (swrela.r_offset < text_base) {
fprintf(stderr, "%s: %s: bad rela at %" PRIx64 "\n",
argv[0], argv[1], pos);
return 4;
}
addr = swrela.r_offset - text_base;
if (fseek(f, addr, SEEK_SET) < 0) {
fprintf(stderr, "%s: %s: seek to %"
PRIx64 " failed: %s\n",
argv[0], argv[1], addr, strerror(errno));
}
if (fwrite(&rela.r_addend, sizeof(rela.r_addend), 1, f) != 1) {
fprintf(stderr, "%s: %s: write failed at %" PRIx64 "\n",
argv[0], argv[1], addr);
return 4;
}
}
if (fclose(f) < 0) {
fprintf(stderr, "%s: %s: close failed: %s\n",
argv[0], argv[1], strerror(errno));
return 4;
}
return 0;
}