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![Sam Protsenko](/assets/img/avatar_default.png)
In new versions of Android Boot Image next fields are added to the header (and corresponding payloads are added to the image itself): - v1: Recovery DTBO - v2: DTB Account for these new fields in next functions: 1. android_image_get_end(): as v1 and v2 have new payloads in the image, the calculation of image end address should be extended correspondingly; this is used e.g. by "bootm" command when booting the kernel from Android Boot Image 2. android_print_contents(): new fields values in v1 and v2 should be printed; the result of this function can be seen e.g. in "iminfo" command This commit doesn't add the means for working with new payloads in v1 and v2 images (it will be done in further commits), it only updates existing functions w.r.t. changes in boot image v1/v2. Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
250 lines
7.1 KiB
C
250 lines
7.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2011 Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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*/
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#include <common.h>
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#include <env.h>
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#include <image.h>
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#include <android_image.h>
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#include <malloc.h>
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#include <errno.h>
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#include <asm/unaligned.h>
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#define ANDROID_IMAGE_DEFAULT_KERNEL_ADDR 0x10008000
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static char andr_tmp_str[ANDR_BOOT_ARGS_SIZE + 1];
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static ulong android_image_get_kernel_addr(const struct andr_img_hdr *hdr)
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{
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/*
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* All the Android tools that generate a boot.img use this
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* address as the default.
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*
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* Even though it doesn't really make a lot of sense, and it
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* might be valid on some platforms, we treat that adress as
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* the default value for this field, and try to execute the
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* kernel in place in such a case.
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*
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* Otherwise, we will return the actual value set by the user.
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*/
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if (hdr->kernel_addr == ANDROID_IMAGE_DEFAULT_KERNEL_ADDR)
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return (ulong)hdr + hdr->page_size;
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return hdr->kernel_addr;
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}
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/**
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* android_image_get_kernel() - processes kernel part of Android boot images
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* @hdr: Pointer to image header, which is at the start
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* of the image.
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* @verify: Checksum verification flag. Currently unimplemented.
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* @os_data: Pointer to a ulong variable, will hold os data start
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* address.
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* @os_len: Pointer to a ulong variable, will hold os data length.
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*
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* This function returns the os image's start address and length. Also,
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* it appends the kernel command line to the bootargs env variable.
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*
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* Return: Zero, os start address and length on success,
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* otherwise on failure.
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*/
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int android_image_get_kernel(const struct andr_img_hdr *hdr, int verify,
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ulong *os_data, ulong *os_len)
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{
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u32 kernel_addr = android_image_get_kernel_addr(hdr);
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const struct image_header *ihdr = (const struct image_header *)
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((uintptr_t)hdr + hdr->page_size);
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/*
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* Not all Android tools use the id field for signing the image with
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* sha1 (or anything) so we don't check it. It is not obvious that the
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* string is null terminated so we take care of this.
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*/
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strncpy(andr_tmp_str, hdr->name, ANDR_BOOT_NAME_SIZE);
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andr_tmp_str[ANDR_BOOT_NAME_SIZE] = '\0';
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if (strlen(andr_tmp_str))
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printf("Android's image name: %s\n", andr_tmp_str);
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printf("Kernel load addr 0x%08x size %u KiB\n",
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kernel_addr, DIV_ROUND_UP(hdr->kernel_size, 1024));
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int len = 0;
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if (*hdr->cmdline) {
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printf("Kernel command line: %s\n", hdr->cmdline);
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len += strlen(hdr->cmdline);
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}
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char *bootargs = env_get("bootargs");
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if (bootargs)
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len += strlen(bootargs);
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char *newbootargs = malloc(len + 2);
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if (!newbootargs) {
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puts("Error: malloc in android_image_get_kernel failed!\n");
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return -ENOMEM;
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}
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*newbootargs = '\0';
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if (bootargs) {
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strcpy(newbootargs, bootargs);
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strcat(newbootargs, " ");
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}
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if (*hdr->cmdline)
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strcat(newbootargs, hdr->cmdline);
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env_set("bootargs", newbootargs);
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if (os_data) {
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if (image_get_magic(ihdr) == IH_MAGIC) {
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*os_data = image_get_data(ihdr);
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} else {
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*os_data = (ulong)hdr;
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*os_data += hdr->page_size;
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}
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}
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if (os_len) {
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if (image_get_magic(ihdr) == IH_MAGIC)
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*os_len = image_get_data_size(ihdr);
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else
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*os_len = hdr->kernel_size;
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}
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return 0;
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}
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int android_image_check_header(const struct andr_img_hdr *hdr)
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{
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return memcmp(ANDR_BOOT_MAGIC, hdr->magic, ANDR_BOOT_MAGIC_SIZE);
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}
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ulong android_image_get_end(const struct andr_img_hdr *hdr)
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{
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ulong end;
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/*
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* The header takes a full page, the remaining components are aligned
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* on page boundary
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*/
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end = (ulong)hdr;
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end += hdr->page_size;
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end += ALIGN(hdr->kernel_size, hdr->page_size);
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end += ALIGN(hdr->ramdisk_size, hdr->page_size);
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end += ALIGN(hdr->second_size, hdr->page_size);
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if (hdr->header_version >= 1)
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end += ALIGN(hdr->recovery_dtbo_size, hdr->page_size);
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if (hdr->header_version >= 2)
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end += ALIGN(hdr->dtb_size, hdr->page_size);
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return end;
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}
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ulong android_image_get_kload(const struct andr_img_hdr *hdr)
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{
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return android_image_get_kernel_addr(hdr);
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}
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ulong android_image_get_kcomp(const struct andr_img_hdr *hdr)
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{
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const void *p = (void *)((uintptr_t)hdr + hdr->page_size);
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if (image_get_magic((image_header_t *)p) == IH_MAGIC)
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return image_get_comp((image_header_t *)p);
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else if (get_unaligned_le32(p) == LZ4F_MAGIC)
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return IH_COMP_LZ4;
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else
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return IH_COMP_NONE;
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}
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int android_image_get_ramdisk(const struct andr_img_hdr *hdr,
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ulong *rd_data, ulong *rd_len)
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{
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if (!hdr->ramdisk_size) {
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*rd_data = *rd_len = 0;
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return -1;
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}
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printf("RAM disk load addr 0x%08x size %u KiB\n",
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hdr->ramdisk_addr, DIV_ROUND_UP(hdr->ramdisk_size, 1024));
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*rd_data = (unsigned long)hdr;
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*rd_data += hdr->page_size;
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*rd_data += ALIGN(hdr->kernel_size, hdr->page_size);
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*rd_len = hdr->ramdisk_size;
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return 0;
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}
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int android_image_get_second(const struct andr_img_hdr *hdr,
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ulong *second_data, ulong *second_len)
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{
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if (!hdr->second_size) {
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*second_data = *second_len = 0;
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return -1;
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}
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*second_data = (unsigned long)hdr;
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*second_data += hdr->page_size;
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*second_data += ALIGN(hdr->kernel_size, hdr->page_size);
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*second_data += ALIGN(hdr->ramdisk_size, hdr->page_size);
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printf("second address is 0x%lx\n",*second_data);
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*second_len = hdr->second_size;
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return 0;
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}
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#if !defined(CONFIG_SPL_BUILD)
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/**
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* android_print_contents - prints out the contents of the Android format image
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* @hdr: pointer to the Android format image header
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*
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* android_print_contents() formats a multi line Android image contents
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* description.
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* The routine prints out Android image properties
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*
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* returns:
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* no returned results
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*/
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void android_print_contents(const struct andr_img_hdr *hdr)
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{
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const char * const p = IMAGE_INDENT_STRING;
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/* os_version = ver << 11 | lvl */
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u32 os_ver = hdr->os_version >> 11;
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u32 os_lvl = hdr->os_version & ((1U << 11) - 1);
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printf("%skernel size: %x\n", p, hdr->kernel_size);
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printf("%skernel address: %x\n", p, hdr->kernel_addr);
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printf("%sramdisk size: %x\n", p, hdr->ramdisk_size);
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printf("%sramdisk address: %x\n", p, hdr->ramdisk_addr);
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printf("%ssecond size: %x\n", p, hdr->second_size);
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printf("%ssecond address: %x\n", p, hdr->second_addr);
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printf("%stags address: %x\n", p, hdr->tags_addr);
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printf("%spage size: %x\n", p, hdr->page_size);
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/* ver = A << 14 | B << 7 | C (7 bits for each of A, B, C)
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* lvl = ((Y - 2000) & 127) << 4 | M (7 bits for Y, 4 bits for M) */
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printf("%sos_version: %x (ver: %u.%u.%u, level: %u.%u)\n",
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p, hdr->os_version,
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(os_ver >> 7) & 0x7F, (os_ver >> 14) & 0x7F, os_ver & 0x7F,
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(os_lvl >> 4) + 2000, os_lvl & 0x0F);
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printf("%sname: %s\n", p, hdr->name);
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printf("%scmdline: %s\n", p, hdr->cmdline);
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printf("%sheader_version: %d\n", p, hdr->header_version);
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if (hdr->header_version >= 1) {
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printf("%srecovery dtbo size: %x\n", p,
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hdr->recovery_dtbo_size);
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printf("%srecovery dtbo offset: %llx\n", p,
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hdr->recovery_dtbo_offset);
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printf("%sheader size: %x\n", p,
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hdr->header_size);
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}
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if (hdr->header_version >= 2) {
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printf("%sdtb size: %x\n", p, hdr->dtb_size);
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printf("%sdtb addr: %llx\n", p, hdr->dtb_addr);
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}
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}
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#endif
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