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036922ed8a
The default behavior of dump_kernel_config is changed from using CROS_32BIT_ENTRY_ADDR to reading from kernel preamble. The main motivation for this change is in preparation for ARM boards of which kernel body load address cannot be CROS_32BIT_ENTRY_ADDR. Since we do not want that all ARM calling sides of dump_kernel_config have to carry the kloadaddr argument, it would be better to let dump_kernel_config read this address from the kernel preamble by default. BUG=chromium-os:28077 TEST=Run dump_kernel_config w/ and w/o this change Change-Id: I5eddcc35e5970dfce02cc66208438c57351f1c81 Reviewed-on: https://gerrit.chromium.org/gerrit/19660 Tested-by: Che-Liang Chiou <clchiou@chromium.org> Reviewed-by: Don Garrett <dgarrett@chromium.org> Reviewed-by: Bill Richardson <wfrichar@chromium.org> Commit-Ready: Che-Liang Chiou <clchiou@chromium.org>
103 lines
2.2 KiB
C
103 lines
2.2 KiB
C
/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Exports the kernel commandline from a given partition/image.
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*/
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#include "dump_kernel_config.h"
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#include <getopt.h>
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#include <stdio.h>
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#include <sys/mman.h>
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#include <unistd.h>
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#include "kernel_blob.h"
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enum {
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OPT_KLOADADDR = 1000,
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};
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static struct option long_opts[] = {
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{ "kloadaddr", 1, NULL, OPT_KLOADADDR },
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{ NULL, 0, NULL, 0 }
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};
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/* Print help and return error */
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static int PrintHelp(void) {
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puts("dump_kernel_config - Prints the kernel command line\n"
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"\n"
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"Usage: dump_kernel_config [--kloadaddr <ADDRESS>] "
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"<image/blockdevice>\n"
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"\n"
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"");
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return 1;
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}
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int main(int argc, char* argv[]) {
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uint8_t* blob;
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size_t blob_size;
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char* infile = NULL;
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uint8_t *config = NULL;
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uint64_t kernel_body_load_address = CROS_NO_ENTRY_ADDR;
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int parse_error = 0;
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char *e;
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int i;
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while (((i = getopt_long(argc, argv, ":", long_opts, NULL)) != -1) &&
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!parse_error) {
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switch (i) {
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default:
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case '?':
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/* Unhandled option */
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parse_error = 1;
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break;
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case 0:
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/* silently handled option */
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break;
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case OPT_KLOADADDR:
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kernel_body_load_address = strtoul(optarg, &e, 0);
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if (!*optarg || (e && *e)) {
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fprintf(stderr, "Invalid --kloadaddr\n");
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parse_error = 1;
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}
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break;
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}
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}
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if (optind >= argc) {
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fprintf(stderr, "Expected argument after options\n");
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parse_error = 1;
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} else
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infile = argv[optind];
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if (parse_error)
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return PrintHelp();
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if (!infile || !*infile) {
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VbExError("Must specify filename\n");
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return 1;
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}
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/* Map the kernel image blob. */
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blob = MapFile(infile, &blob_size);
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if (!blob) {
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VbExError("Error reading input file\n");
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return 1;
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}
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config = find_kernel_config(blob, (uint64_t)blob_size,
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kernel_body_load_address);
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if (!config) {
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VbExError("Error parsing input file\n");
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munmap(blob, blob_size);
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return 1;
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}
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printf("%.*s", CROS_CONFIG_SIZE, config);
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munmap(blob, blob_size);
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return 0;
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}
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