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