123 lines
3.1 KiB
C
123 lines
3.1 KiB
C
/*
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* Copyright (c) 2011 Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.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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static char andr_tmp_str[ANDR_BOOT_ARGS_SIZE + 1];
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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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/*
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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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hdr->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 = getenv("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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setenv("bootargs", newbootargs);
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if (os_data) {
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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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if (os_len)
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*os_len = hdr->kernel_size;
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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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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 hdr->kernel_addr;
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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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return -1;
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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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