Pass the buffer size to the file detection code. This makes sure we do not read past the buffer. This is especially useful for ext filesystem detection as the magic is at byte offset 1080. Also introduce a FILE_TYPE_SAFE_BUFSIZE define which is set to the minimum bufsize the detection code needs to detect all known filetypes. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
527 lines
12 KiB
C
527 lines
12 KiB
C
/*
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* (C) Copyright 2000-2006
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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/*
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* Boot support
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*/
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#include <common.h>
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#include <driver.h>
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#include <command.h>
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#include <image.h>
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#include <malloc.h>
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#include <environment.h>
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#include <asm/byteorder.h>
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#include <xfuncs.h>
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#include <getopt.h>
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#include <fcntl.h>
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#include <fs.h>
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#include <errno.h>
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#include <boot.h>
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#include <of.h>
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#include <libfdt.h>
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#include <rtc.h>
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#include <init.h>
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#include <of.h>
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#include <magicvar.h>
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#include <uncompress.h>
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#include <memory.h>
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#include <filetype.h>
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#include <binfmt.h>
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#include <globalvar.h>
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#include <magicvar.h>
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#include <asm-generic/memory_layout.h>
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static LIST_HEAD(handler_list);
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/*
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* Additional oftree size for the fixed tree
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*/
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#define OFTREE_SIZE_INCREASE 0x8000
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int register_image_handler(struct image_handler *handler)
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{
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list_add_tail(&handler->list, &handler_list);
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return 0;
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}
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#define UIMAGE_SOME_ADDRESS (UIMAGE_INVALID_ADDRESS - 1)
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static int bootm_open_os_uimage(struct image_data *data)
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{
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int ret;
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data->os = uimage_open(data->os_file);
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if (!data->os)
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return -EINVAL;
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if (data->verify) {
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ret = uimage_verify(data->os);
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if (ret) {
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printf("Checking data crc failed with %s\n",
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strerror(-ret));
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uimage_close(data->os);
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return ret;
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}
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}
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uimage_print_contents(data->os);
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if (data->os->header.ih_arch != IH_ARCH) {
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printf("Unsupported Architecture 0x%x\n",
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data->os->header.ih_arch);
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uimage_close(data->os);
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return -EINVAL;
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}
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if (data->os_address == UIMAGE_SOME_ADDRESS)
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data->os_address = data->os->header.ih_load;
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if (data->os_address != UIMAGE_INVALID_ADDRESS) {
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data->os_res = uimage_load_to_sdram(data->os, 0,
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data->os_address);
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if (!data->os_res) {
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uimage_close(data->os);
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return -ENOMEM;
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}
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}
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return 0;
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}
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static int bootm_open_initrd_uimage(struct image_data *data)
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{
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int ret;
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if (!data->initrd_file)
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return 0;
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if (strcmp(data->os_file, data->initrd_file)) {
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data->initrd = uimage_open(data->initrd_file);
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if (!data->initrd)
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return -EINVAL;
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if (data->verify) {
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ret = uimage_verify(data->initrd);
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if (ret) {
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printf("Checking data crc failed with %s\n",
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strerror(-ret));
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}
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}
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uimage_print_contents(data->initrd);
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} else {
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data->initrd = data->os;
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}
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if (data->initrd_address == UIMAGE_SOME_ADDRESS)
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data->initrd_address = data->initrd->header.ih_load;
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return 0;
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}
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#ifdef CONFIG_OFTREE
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static int bootm_open_oftree(struct image_data *data, const char *oftree, int num)
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{
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enum filetype ft;
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struct fdt_header *fdt, *fixfdt;
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int ret;
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size_t size;
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unsigned int align;
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if (bootm_verbose(data))
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printf("Loading oftree from '%s'\n", oftree);
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ft = file_name_detect_type(oftree);
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if ((int)ft < 0) {
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printf("failed to open %s: %s\n", oftree, strerror(-(int)ft));
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return ft;
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}
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if (ft == filetype_uimage) {
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#ifdef CONFIG_CMD_BOOTM_OFTREE_UIMAGE
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struct uimage_handle *of_handle;
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int release = 0;
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if (!strcmp(data->os_file, oftree)) {
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of_handle = data->os;
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} else if (!strcmp(data->initrd_file, oftree)) {
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of_handle = data->initrd;
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} else {
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of_handle = uimage_open(oftree);
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if (!of_handle)
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return -ENODEV;
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uimage_print_contents(of_handle);
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release = 1;
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}
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fdt = uimage_load_to_buf(of_handle, num, &size);
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if (release)
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uimage_close(of_handle);
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#else
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return -EINVAL;
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#endif
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} else {
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fdt = read_file(oftree, &size);
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if (!fdt) {
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perror("open");
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return -ENODEV;
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}
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}
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ft = file_detect_type(fdt, size);
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if (ft != filetype_oftree) {
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printf("%s is not an oftree but %s\n", oftree,
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file_type_to_string(ft));
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}
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/*
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* ARM Linux uses a single 1MiB section (with 1MiB alignment)
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* for mapping the devicetree, so we are not allowed to cross
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* 1MiB boundaries.
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*/
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align = 1 << fls(size + OFTREE_SIZE_INCREASE - 1);
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fixfdt = xmemalign(align, size + OFTREE_SIZE_INCREASE);
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memcpy(fixfdt, fdt, size);
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ret = fdt_open_into(fdt, fixfdt, size + OFTREE_SIZE_INCREASE);
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free(fdt);
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if (ret) {
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printf("unable to parse %s\n", oftree);
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return -ENODEV;
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}
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ret = of_fix_tree(fixfdt);
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if (ret)
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return ret;
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if (bootm_verbose(data) > 1)
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fdt_print(fixfdt, "/");
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data->oftree = fixfdt;
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return ret;
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}
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#endif
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static struct image_handler *bootm_find_handler(enum filetype filetype,
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struct image_data *data)
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{
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struct image_handler *handler;
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list_for_each_entry(handler, &handler_list, list) {
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if (filetype != filetype_uimage &&
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handler->filetype == filetype)
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return handler;
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if (filetype == filetype_uimage &&
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handler->ih_os == data->os->header.ih_os)
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return handler;
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}
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return NULL;
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}
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static char *bootm_image_name_and_no(const char *name, int *no)
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{
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char *at, *ret;
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if (!name || !*name)
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return NULL;
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*no = 0;
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ret = xstrdup(name);
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at = strchr(ret, '@');
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if (!at)
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return ret;
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*at++ = 0;
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*no = simple_strtoul(at, NULL, 10);
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return ret;
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}
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#define BOOTM_OPTS_COMMON "ca:e:vo:f"
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#ifdef CONFIG_CMD_BOOTM_INITRD
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#define BOOTM_OPTS BOOTM_OPTS_COMMON "L:r:"
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#else
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#define BOOTM_OPTS BOOTM_OPTS_COMMON
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#endif
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static int do_bootm(int argc, char *argv[])
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{
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int opt;
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struct image_handler *handler;
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struct image_data data;
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int ret = 1;
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enum filetype os_type, initrd_type = filetype_unknown;
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const char *oftree = NULL, *initrd_file = NULL, *os_file = NULL;
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int fallback = 0;
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memset(&data, 0, sizeof(struct image_data));
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data.initrd_address = UIMAGE_SOME_ADDRESS;
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data.os_address = UIMAGE_SOME_ADDRESS;
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data.verify = 0;
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data.verbose = 0;
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oftree = getenv("global.bootm.oftree");
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os_file = getenv("global.bootm.image");
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if (IS_ENABLED(CONFIG_CMD_BOOTM_INITRD))
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initrd_file = getenv("global.bootm.initrd");
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while ((opt = getopt(argc, argv, BOOTM_OPTS)) > 0) {
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switch(opt) {
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case 'c':
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data.verify = 1;
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break;
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#ifdef CONFIG_CMD_BOOTM_INITRD
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case 'L':
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data.initrd_address = simple_strtoul(optarg, NULL, 0);
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break;
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case 'r':
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initrd_file = optarg;
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break;
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#endif
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case 'a':
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data.os_address = simple_strtoul(optarg, NULL, 0);
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break;
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case 'e':
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data.os_entry = simple_strtoul(optarg, NULL, 0);
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break;
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case 'v':
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data.verbose++;
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break;
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case 'o':
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oftree = optarg;
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break;
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case 'f':
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fallback = 1;
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break;
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default:
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break;
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}
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}
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if (optind != argc)
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os_file = argv[optind];
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if (!os_file || !*os_file) {
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printf("no boot image given\n");
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goto err_out;
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}
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if (initrd_file && !*initrd_file)
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initrd_file = NULL;
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if (oftree && !*oftree)
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oftree = NULL;
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data.os_file = bootm_image_name_and_no(os_file, &data.os_num);
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os_type = file_name_detect_type(data.os_file);
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if ((int)os_type < 0) {
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printf("could not open %s: %s\n", data.os_file,
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strerror(-os_type));
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goto err_out;
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}
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if (!fallback && os_type == filetype_unknown) {
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printf("Unknown OS filetype (try -f)\n");
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goto err_out;
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}
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if (os_type == filetype_uimage) {
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ret = bootm_open_os_uimage(&data);
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if (ret) {
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printf("loading os image failed with %s\n",
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strerror(-ret));
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goto err_out;
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}
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}
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if (IS_ENABLED(CONFIG_CMD_BOOTM_INITRD) && initrd_file) {
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data.initrd_file = bootm_image_name_and_no(initrd_file, &data.initrd_num);
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initrd_type = file_name_detect_type(data.initrd_file);
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if ((int)initrd_type < 0) {
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printf("could not open %s: %s\n", data.initrd_file,
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strerror(-initrd_type));
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goto err_out;
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}
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if (initrd_type == filetype_uimage) {
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ret = bootm_open_initrd_uimage(&data);
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if (ret) {
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printf("loading initrd failed with %s\n",
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strerror(-ret));
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goto err_out;
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}
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}
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}
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if (bootm_verbose(&data)) {
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printf("\nLoading OS %s '%s'", file_type_to_string(os_type),
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data.os_file);
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if (os_type == filetype_uimage &&
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data.os->header.ih_type == IH_TYPE_MULTI)
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printf(", multifile image %d", data.os_num);
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printf("\n");
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if (data.os_res)
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printf("OS image is at 0x%08x-0x%08x\n",
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data.os_res->start,
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data.os_res->end);
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else
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printf("OS image not yet relocated\n");
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if (data.initrd_file) {
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printf("Loading initrd %s '%s'",
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file_type_to_string(initrd_type),
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data.initrd_file);
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if (initrd_type == filetype_uimage &&
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data.initrd->header.ih_type == IH_TYPE_MULTI)
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printf(", multifile image %d", data.initrd_num);
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printf("\n");
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if (data.initrd_res)
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printf("initrd is at 0x%08x-0x%08x\n",
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data.initrd_res->start,
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data.initrd_res->end);
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else
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printf("initrd image not yet relocated\n");
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}
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}
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#ifdef CONFIG_OFTREE
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if (oftree) {
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int oftree_num;
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oftree = bootm_image_name_and_no(oftree, &oftree_num);
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ret = bootm_open_oftree(&data, oftree, oftree_num);
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if (ret)
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goto err_out;
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}
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#endif
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if (data.os_address == UIMAGE_SOME_ADDRESS)
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data.os_address = UIMAGE_INVALID_ADDRESS;
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if (data.initrd_address == UIMAGE_SOME_ADDRESS)
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data.initrd_address = UIMAGE_INVALID_ADDRESS;
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handler = bootm_find_handler(os_type, &data);
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if (!handler) {
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printf("no image handler found for image type %s\n",
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file_type_to_string(os_type));
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if (os_type == filetype_uimage)
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printf("and os type: %d\n", data.os->header.ih_os);
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goto err_out;
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}
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if (bootm_verbose(&data))
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printf("Passing control to %s handler\n", handler->name);
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ret = handler->bootm(&data);
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printf("handler failed with %s\n", strerror(-ret));
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err_out:
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free(data.initrd_file);
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free(data.os_file);
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if (data.os_res)
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release_sdram_region(data.os_res);
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if (data.initrd_res)
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release_sdram_region(data.initrd_res);
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if (data.initrd && data.initrd != data.os)
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uimage_close(data.initrd);
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if (data.os)
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uimage_close(data.os);
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return 1;
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}
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static int bootm_init(void)
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{
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globalvar_add_simple("bootm.image");
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globalvar_add_simple("bootm.oftree");
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if (IS_ENABLED(CONFIG_CMD_BOOTM_INITRD))
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globalvar_add_simple("bootm.initrd");
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return 0;
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}
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late_initcall(bootm_init);
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BAREBOX_CMD_HELP_START(bootm)
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BAREBOX_CMD_HELP_USAGE("bootm [OPTIONS] image\n")
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BAREBOX_CMD_HELP_SHORT("Boot an application image.\n")
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BAREBOX_CMD_HELP_OPT ("-c", "crc check uImage data\n")
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#ifdef CONFIG_CMD_BOOTM_INITRD
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BAREBOX_CMD_HELP_OPT ("-r <initrd>","specify an initrd image\n")
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BAREBOX_CMD_HELP_OPT ("-L <load addr>","specify initrd load address\n")
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#endif
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BAREBOX_CMD_HELP_OPT ("-a <load addr>","specify os load address\n")
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BAREBOX_CMD_HELP_OPT ("-e <ofs>","entry point to the image relative to start (0)\n")
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#ifdef CONFIG_OFTREE
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BAREBOX_CMD_HELP_OPT ("-o <oftree>","specify oftree\n")
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#endif
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#ifdef CONFIG_CMD_BOOTM_VERBOSE
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BAREBOX_CMD_HELP_OPT ("-v","verbose\n")
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#endif
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BAREBOX_CMD_HELP_END
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BAREBOX_CMD_START(bootm)
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.cmd = do_bootm,
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.usage = "boot an application image",
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BAREBOX_CMD_HELP(cmd_bootm_help)
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BAREBOX_CMD_END
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BAREBOX_MAGICVAR(bootargs, "Linux Kernel parameters");
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BAREBOX_MAGICVAR_NAMED(global_bootm_image, global.bootm.image, "bootm default boot image");
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BAREBOX_MAGICVAR_NAMED(global_bootm_initrd, global.bootm.initrd, "bootm default initrd");
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static struct binfmt_hook binfmt_uimage_hook = {
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.type = filetype_uimage,
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.exec = "bootm",
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};
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static int binfmt_uimage_init(void)
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{
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return binfmt_register(&binfmt_uimage_hook);
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}
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fs_initcall(binfmt_uimage_init);
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/**
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* @file
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* @brief Boot support for Linux
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*/
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/**
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* @page boot_preparation Preparing for Boot
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|
*
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* This chapter describes what's to be done to forward the control from
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* barebox to Linux. This part describes the generic part, below you can find
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* the architecture specific part.
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*
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* - @subpage arm_boot_preparation
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* - @subpage ppc_boot_preparation
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* - @subpage x86_boot_preparation
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|
*/
|