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common/image-android.c
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// SPDX-License-Identifier: GPL-2.0+ |
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/* * Copyright (c) 2011 Sebastian Andrzej Siewior <bigeasy@linutronix.de> |
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*/ #include <common.h> |
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#include <env.h> |
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#include <image.h> #include <android_image.h> |
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#include <malloc.h> #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) { /* * All the Android tools that generate a boot.img use this * address as the default. * * Even though it doesn't really make a lot of sense, and it * might be valid on some platforms, we treat that adress as * the default value for this field, and try to execute the * kernel in place in such a case. * * Otherwise, we will return the actual value set by the user. */ if (hdr->kernel_addr == ANDROID_IMAGE_DEFAULT_KERNEL_ADDR) return (ulong)hdr + hdr->page_size; return hdr->kernel_addr; } |
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/** * android_image_get_kernel() - processes kernel part of Android boot images * @hdr: Pointer to image header, which is at the start * of the image. * @verify: Checksum verification flag. Currently unimplemented. * @os_data: Pointer to a ulong variable, will hold os data start * address. * @os_len: Pointer to a ulong variable, will hold os data length. * * This function returns the os image's start address and length. Also, * it appends the kernel command line to the bootargs env variable. * * Return: Zero, os start address and length on success, * otherwise on failure. */ |
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int android_image_get_kernel(const struct andr_img_hdr *hdr, int verify, ulong *os_data, ulong *os_len) { |
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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 *) ((uintptr_t)hdr + hdr->page_size); |
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/* * Not all Android tools use the id field for signing the image with * sha1 (or anything) so we don't check it. It is not obvious that the * string is null terminated so we take care of this. */ strncpy(andr_tmp_str, hdr->name, ANDR_BOOT_NAME_SIZE); andr_tmp_str[ANDR_BOOT_NAME_SIZE] = '\0'; if (strlen(andr_tmp_str)) printf("Android's image name: %s ", andr_tmp_str); printf("Kernel load addr 0x%08x size %u KiB ", |
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kernel_addr, DIV_ROUND_UP(hdr->kernel_size, 1024)); |
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int len = 0; if (*hdr->cmdline) { printf("Kernel command line: %s ", hdr->cmdline); len += strlen(hdr->cmdline); } |
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char *bootargs = env_get("bootargs"); |
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if (bootargs) len += strlen(bootargs); char *newbootargs = malloc(len + 2); if (!newbootargs) { puts("Error: malloc in android_image_get_kernel failed! "); return -ENOMEM; } *newbootargs = '\0'; if (bootargs) { strcpy(newbootargs, bootargs); strcat(newbootargs, " "); |
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} |
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if (*hdr->cmdline) 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) { *os_data = image_get_data(ihdr); } else { *os_data = (ulong)hdr; *os_data += hdr->page_size; } } if (os_len) { if (image_get_magic(ihdr) == IH_MAGIC) *os_len = image_get_data_size(ihdr); else *os_len = hdr->kernel_size; |
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} |
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return 0; } int android_image_check_header(const struct andr_img_hdr *hdr) { return memcmp(ANDR_BOOT_MAGIC, hdr->magic, ANDR_BOOT_MAGIC_SIZE); } ulong android_image_get_end(const struct andr_img_hdr *hdr) { |
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ulong end; |
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/* * The header takes a full page, the remaining components are aligned * on page boundary */ |
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end = (ulong)hdr; end += hdr->page_size; end += ALIGN(hdr->kernel_size, hdr->page_size); end += ALIGN(hdr->ramdisk_size, hdr->page_size); end += ALIGN(hdr->second_size, hdr->page_size); |
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if (hdr->header_version >= 1) end += ALIGN(hdr->recovery_dtbo_size, hdr->page_size); if (hdr->header_version >= 2) end += ALIGN(hdr->dtb_size, hdr->page_size); |
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return end; |
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} ulong android_image_get_kload(const struct andr_img_hdr *hdr) { |
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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) { const void *p = (void *)((uintptr_t)hdr + hdr->page_size); |
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if (image_get_magic((image_header_t *)p) == IH_MAGIC) return image_get_comp((image_header_t *)p); else if (get_unaligned_le32(p) == LZ4F_MAGIC) |
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return IH_COMP_LZ4; else return IH_COMP_NONE; } |
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int android_image_get_ramdisk(const struct andr_img_hdr *hdr, ulong *rd_data, ulong *rd_len) { |
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if (!hdr->ramdisk_size) { *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 ", hdr->ramdisk_addr, DIV_ROUND_UP(hdr->ramdisk_size, 1024)); |
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*rd_data = (unsigned long)hdr; *rd_data += hdr->page_size; *rd_data += ALIGN(hdr->kernel_size, hdr->page_size); *rd_len = hdr->ramdisk_size; return 0; } |
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int android_image_get_second(const struct andr_img_hdr *hdr, ulong *second_data, ulong *second_len) { if (!hdr->second_size) { *second_data = *second_len = 0; return -1; } *second_data = (unsigned long)hdr; *second_data += hdr->page_size; *second_data += ALIGN(hdr->kernel_size, hdr->page_size); *second_data += ALIGN(hdr->ramdisk_size, hdr->page_size); printf("second address is 0x%lx ",*second_data); *second_len = hdr->second_size; return 0; } |
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#if !defined(CONFIG_SPL_BUILD) /** * android_print_contents - prints out the contents of the Android format image * @hdr: pointer to the Android format image header * * android_print_contents() formats a multi line Android image contents * description. * The routine prints out Android image properties * * returns: * no returned results */ void android_print_contents(const struct andr_img_hdr *hdr) { const char * const p = IMAGE_INDENT_STRING; |
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/* os_version = ver << 11 | lvl */ u32 os_ver = hdr->os_version >> 11; u32 os_lvl = hdr->os_version & ((1U << 11) - 1); |
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printf("%skernel size: %x ", p, hdr->kernel_size); printf("%skernel address: %x ", p, hdr->kernel_addr); printf("%sramdisk size: %x ", p, hdr->ramdisk_size); printf("%sramdisk address: %x ", p, hdr->ramdisk_addr); printf("%ssecond size: %x ", p, hdr->second_size); printf("%ssecond address: %x ", p, hdr->second_addr); printf("%stags address: %x ", p, hdr->tags_addr); printf("%spage size: %x ", p, hdr->page_size); |
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/* ver = A << 14 | B << 7 | C (7 bits for each of A, B, C) * 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) ", |
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p, hdr->os_version, (os_ver >> 7) & 0x7F, (os_ver >> 14) & 0x7F, os_ver & 0x7F, (os_lvl >> 4) + 2000, os_lvl & 0x0F); |
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printf("%sname: %s ", p, hdr->name); printf("%scmdline: %s ", p, hdr->cmdline); printf("%sheader_version: %d ", p, hdr->header_version); if (hdr->header_version >= 1) { printf("%srecovery dtbo size: %x ", p, hdr->recovery_dtbo_size); printf("%srecovery dtbo offset: %llx ", p, hdr->recovery_dtbo_offset); printf("%sheader size: %x ", p, hdr->header_size); } if (hdr->header_version >= 2) { printf("%sdtb size: %x ", p, hdr->dtb_size); printf("%sdtb addr: %llx ", p, hdr->dtb_addr); } |
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} #endif |