341 lines
8.9 KiB
C++
341 lines
8.9 KiB
C++
#pragma once
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#include <stdint.h>
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#include <utility>
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#include "format.h"
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/****************
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* Other Headers
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****************/
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struct mtk_hdr {
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uint32_t magic; /* MTK magic */
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uint32_t size; /* Size of the content */
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char name[32]; /* The type of the header */
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char padding[472]; /* Padding to 512 bytes */
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} __attribute__((packed));
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struct dhtb_hdr {
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char magic[8]; /* DHTB magic */
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uint8_t checksum[40]; /* Payload SHA256, whole image + SEANDROIDENFORCE + 0xFFFFFFFF */
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uint32_t size; /* Payload size, whole image + SEANDROIDENFORCE + 0xFFFFFFFF */
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char padding[460]; /* Padding to 512 bytes */
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} __attribute__((packed));
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struct blob_hdr {
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char secure_magic[20]; /* "-SIGNED-BY-SIGNBLOB-" */
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uint32_t datalen; /* 0x00000000 */
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uint32_t signature; /* 0x00000000 */
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char magic[16]; /* "MSM-RADIO-UPDATE" */
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uint32_t hdr_version; /* 0x00010000 */
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uint32_t hdr_size; /* Size of header */
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uint32_t part_offset; /* Same as size */
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uint32_t num_parts; /* Number of partitions */
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uint32_t unknown[7]; /* All 0x00000000 */
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char name[4]; /* Name of partition */
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uint32_t offset; /* offset in blob where this partition starts */
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uint32_t size; /* Size of data */
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uint32_t version; /* 0x00000001 */
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} __attribute__((packed));
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/*********************
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* Boot Image Headers
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*********************/
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struct boot_img_hdr_base {
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char magic[8];
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uint32_t kernel_size; /* size in bytes */
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uint32_t kernel_addr; /* physical load addr */
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uint32_t ramdisk_size; /* size in bytes */
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uint32_t ramdisk_addr; /* physical load addr */
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uint32_t second_size; /* size in bytes */
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uint32_t second_addr; /* physical load addr */
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} __attribute__((packed));
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struct boot_img_hdr_v0 : public boot_img_hdr_base {
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uint32_t tags_addr; /* physical addr for kernel tags */
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uint32_t page_size; /* flash page size we assume */
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/* In header v1, this field is used for header version
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* However, on some devices like Samsung, this field is used to store DTB
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* We will treat this field differently based on its value */
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union {
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uint32_t header_version; /* the version of the header */
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uint32_t extra_size; /* extra blob size in bytes */
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};
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/* operating system version and security patch level; for
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* version "A.B.C" and patch level "Y-M-D":
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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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* os_version = ver << 11 | lvl */
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uint32_t os_version;
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char name[16]; /* asciiz product name */
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char cmdline[512];
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char id[32]; /* timestamp / checksum / sha1 / etc */
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/* Supplemental command line data; kept here to maintain
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* binary compatibility with older versions of mkbootimg */
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char extra_cmdline[1024];
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} __attribute__((packed));
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struct boot_img_hdr_v1 : public boot_img_hdr_v0 {
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uint32_t recovery_dtbo_size; /* size in bytes for recovery DTBO/ACPIO image */
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uint64_t recovery_dtbo_offset; /* offset to recovery dtbo/acpio in boot image */
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uint32_t header_size;
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} __attribute__((packed));
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struct boot_img_hdr_v2 : public boot_img_hdr_v1 {
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uint32_t dtb_size; /* size in bytes for DTB image */
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uint64_t dtb_addr; /* physical load address for DTB image */
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} __attribute__((packed));
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// Default to hdr v2
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using boot_img_hdr = boot_img_hdr_v2;
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// Special Samsung header
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struct boot_img_hdr_pxa : public boot_img_hdr_base {
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uint32_t extra_size; /* extra blob size in bytes */
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uint32_t unknown;
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uint32_t tags_addr; /* physical addr for kernel tags */
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uint32_t page_size; /* flash page size we assume */
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char name[24]; /* asciiz product name */
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char cmdline[512];
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char id[32]; /* timestamp / checksum / sha1 / etc */
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/* Supplemental command line data; kept here to maintain
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* binary compatibility with older versions of mkbootimg */
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char extra_cmdline[1024];
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} __attribute__((packed));
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/*
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** +-----------------+
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** | boot header | 1 page
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** +-----------------+
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** | kernel | n pages
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** +-----------------+
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** | ramdisk | m pages
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** +-----------------+
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** | second stage | o pages
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** +-----------------+
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** | extra blob | p pages
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** +-----------------+
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** | recovery dtbo | q pages
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** +-----------------+
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** | dtb | r pages
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** +-----------------+
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**
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** n = (kernel_size + page_size - 1) / page_size
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** m = (ramdisk_size + page_size - 1) / page_size
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** o = (second_size + page_size - 1) / page_size
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** p = (extra_size + page_size - 1) / page_size
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** q = (recovery_dtbo_size + page_size - 1) / page_size
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** r = (dtb_size + page_size - 1) / page_size
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**
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** 0. all entities are page_size aligned in flash
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** 1. kernel and ramdisk are required (size != 0)
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** 2. second is optional (second_size == 0 -> no second)
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** 3. load each element (kernel, ramdisk, second) at
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** the specified physical address (kernel_addr, etc)
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** 4. prepare tags at tag_addr. kernel_args[] is
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** appended to the kernel commandline in the tags.
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** 5. r0 = 0, r1 = MACHINE_TYPE, r2 = tags_addr
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** 6. if second_size != 0: jump to second_addr
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** else: jump to kernel_addr
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*/
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#define drct_var(name) \
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auto &name() { return img_hdr->name; }
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#define decl_var(name, len) \
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virtual uint##len##_t &name() { j##len = 0; return j##len; }
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#define decl_val(name, type) \
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virtual type name() { return 0; }
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struct dyn_img_hdr {
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// Direct entries
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drct_var(kernel_size)
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drct_var(ramdisk_size)
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drct_var(second_size)
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// Standard entries
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decl_var(page_size, 32)
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decl_val(header_version, uint32_t)
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decl_var(extra_size, 32)
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decl_var(os_version, 32)
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decl_val(name, char *)
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decl_val(cmdline, char *)
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decl_val(id, char *)
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decl_val(extra_cmdline, char *)
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// v1/v2 specific
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decl_var(recovery_dtbo_size, 32)
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decl_var(recovery_dtbo_offset, 64)
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decl_var(header_size, 32)
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decl_var(dtb_size, 32)
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virtual ~dyn_img_hdr() {
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free(raw);
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}
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virtual size_t hdr_size() = 0;
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boot_img_hdr_base * const &operator* () const {
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return img_hdr;
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}
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void print();
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void dump_hdr_file();
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void load_hdr_file();
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protected:
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union {
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/* Main header could be either AOSP or PXA,
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* but both of them are base headers. */
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boot_img_hdr_base *img_hdr; /* Common base header */
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boot_img_hdr_v2 *v2_hdr; /* AOSP v2 header */
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boot_img_hdr_pxa *hdr_pxa; /* Samsung PXA header */
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void *raw; /* Raw pointer */
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};
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private:
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// Junk for references
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static uint32_t j32;
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static uint64_t j64;
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};
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#undef drct_var
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#undef decl_var
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#undef decl_val
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#define __impl_cls(name, hdr) \
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protected: name() = default; \
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public: \
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name(void *ptr) { \
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raw = xmalloc(sizeof(hdr)); \
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memcpy(raw, ptr, sizeof(hdr)); \
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} \
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size_t hdr_size() override { return sizeof(hdr); }
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#define impl_cls(ver) __impl_cls(dyn_img_##ver, boot_img_hdr_##ver)
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#define impl_val(name) \
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decltype(std::declval<dyn_img_hdr>().name()) name() override { return hdr_pxa->name; }
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struct dyn_img_pxa : public dyn_img_hdr {
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impl_cls(pxa)
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impl_val(extra_size)
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impl_val(page_size)
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impl_val(name)
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impl_val(cmdline)
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impl_val(id)
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impl_val(extra_cmdline)
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};
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#undef impl_val
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#define impl_val(name) \
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decltype(std::declval<dyn_img_hdr>().name()) name() override { return v2_hdr->name; }
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struct dyn_img_v0 : public dyn_img_hdr {
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impl_cls(v0)
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impl_val(page_size)
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impl_val(extra_size)
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impl_val(os_version)
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impl_val(name)
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impl_val(cmdline)
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impl_val(id)
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impl_val(extra_cmdline)
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};
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struct dyn_img_v1 : public dyn_img_v0 {
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impl_cls(v1)
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impl_val(header_version)
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impl_val(recovery_dtbo_size)
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impl_val(recovery_dtbo_offset)
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impl_val(header_size)
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uint32_t &extra_size() override {
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return dyn_img_hdr::extra_size();
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}
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};
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struct dyn_img_v2 : public dyn_img_v1 {
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impl_cls(v2)
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impl_val(dtb_size)
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};
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#undef __impl_cls
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#undef impl_cls
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#undef impl_val
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// Flags
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#define MTK_KERNEL (1 << 0)
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#define MTK_RAMDISK (1 << 1)
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#define CHROMEOS_FLAG (1 << 2)
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#define DHTB_FLAG (1 << 3)
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#define SEANDROID_FLAG (1 << 4)
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#define LG_BUMP_FLAG (1 << 5)
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#define SHA256_FLAG (1 << 6)
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#define BLOB_FLAG (1 << 7)
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#define NOOKHD_FLAG (1 << 8)
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#define ACCLAIM_FLAG (1 << 9)
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struct boot_img {
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// Memory map of the whole image
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uint8_t *map_addr;
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size_t map_size;
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// Android image header
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dyn_img_hdr *hdr;
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// Flags to indicate the state of current boot image
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uint16_t flags = 0;
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// The format of kernel and ramdisk
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format_t k_fmt;
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format_t r_fmt;
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/***************************************************
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* Following pointers points within the mmap region
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***************************************************/
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// MTK headers
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mtk_hdr *k_hdr;
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mtk_hdr *r_hdr;
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// Pointer to dtb that is appended after kernel
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uint8_t *kernel_dtb;
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uint32_t kernel_dt_size = 0;
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// Pointer to end of image
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uint8_t *tail;
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size_t tail_size = 0;
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// Pointers to blocks defined in header
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uint8_t *hdr_addr;
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uint8_t *kernel;
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uint8_t *ramdisk;
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uint8_t *second;
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uint8_t *extra;
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uint8_t *recovery_dtbo;
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uint8_t *dtb;
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boot_img(const char *);
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~boot_img();
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void parse_image(uint8_t *addr);
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void find_kernel_dtb();
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};
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