forked from MarcoBuster/Magisk
233 lines
7.2 KiB
C
233 lines
7.2 KiB
C
#include <stdint.h>
|
|
#include "format.h"
|
|
|
|
#ifndef _BOOT_IMAGE_H_
|
|
#define _BOOT_IMAGE_H_
|
|
|
|
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 image */
|
|
uint64_t recovery_dtbo_offset; /* offset to recovery dtbo in boot image */
|
|
uint32_t header_size;
|
|
} __attribute__((packed));
|
|
|
|
// Default to hdr v1
|
|
typedef boot_img_hdr_v1 boot_img_hdr;
|
|
|
|
// 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; /* unknown value */
|
|
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
|
|
** +-----------------+
|
|
**
|
|
** 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
|
|
**
|
|
** 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
|
|
*/
|
|
|
|
struct mtk_hdr {
|
|
uint32_t magic; /* MTK magic */
|
|
uint32_t size; /* Size of the content */
|
|
char name[32]; /* The type of the header */
|
|
} __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 */
|
|
} __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));
|
|
|
|
// Flags
|
|
#define MTK_KERNEL 0x0001
|
|
#define MTK_RAMDISK 0x0002
|
|
#define CHROMEOS_FLAG 0x0004
|
|
#define PXA_FLAG 0x0008
|
|
#define DHTB_FLAG 0x0010
|
|
#define SEANDROID_FLAG 0x0020
|
|
#define LG_BUMP_FLAG 0x0040
|
|
#define SHA256_FLAG 0x0080
|
|
#define BLOB_FLAG 0x0100
|
|
#define NOOKHD_FLAG 0x0200
|
|
#define ACCLAIM_FLAG 0x0400
|
|
|
|
struct boot_img {
|
|
// Memory map of the whole image
|
|
uint8_t *map_addr;
|
|
size_t map_size;
|
|
|
|
// Headers
|
|
boot_img_hdr_base *hdr; /* Android boot image header */
|
|
mtk_hdr *k_hdr; /* MTK kernel header */
|
|
mtk_hdr *r_hdr; /* MTK ramdisk header */
|
|
blob_hdr *b_hdr; /* Tegra blob header */
|
|
|
|
// Flags to indicate the state of current boot image
|
|
uint16_t flags;
|
|
|
|
// The format of kernel and ramdisk
|
|
format_t k_fmt;
|
|
format_t r_fmt;
|
|
|
|
// Pointer to dtb that is appended after kernel
|
|
uint8_t *dtb;
|
|
uint32_t dt_size;
|
|
|
|
// Pointer to end of image
|
|
uint8_t *tail;
|
|
size_t tail_size;
|
|
|
|
// Pointers to blocks defined in header
|
|
uint8_t *kernel;
|
|
uint8_t *ramdisk;
|
|
uint8_t *second;
|
|
uint8_t *extra;
|
|
uint8_t *recov_dtbo;
|
|
|
|
~boot_img();
|
|
|
|
int parse_image(const char *);
|
|
void find_dtb();
|
|
void print_hdr();
|
|
|
|
/* Access elements in header */
|
|
|
|
#define IS_PXA (flags & PXA_FLAG)
|
|
#define dyn_access(x) (IS_PXA ? \
|
|
static_cast<boot_img_hdr_pxa *>(hdr)->x : \
|
|
static_cast<boot_img_hdr_v1 *>(hdr)->x)
|
|
|
|
#define dyn_get(x, t) t x() const { return dyn_access(x); }
|
|
#define dyn_set(x, t) void x(t v) { dyn_access(x) = v; }
|
|
#define hdr_get(x, t) t x() const { return IS_PXA ? 0 : static_cast<boot_img_hdr *>(hdr)->x; }
|
|
#define hdr_set(x, t) void x(t v) { if (!IS_PXA) static_cast<boot_img_hdr *>(hdr)->x = v; }
|
|
|
|
dyn_set(extra_size, uint32_t);
|
|
dyn_get(page_size, uint32_t);
|
|
dyn_get(name, char *);
|
|
dyn_get(cmdline, char *);
|
|
dyn_get(id, char *);
|
|
dyn_get(extra_cmdline, char *);
|
|
|
|
hdr_get(os_version, uint32_t);
|
|
hdr_get(recovery_dtbo_size, uint32_t);
|
|
hdr_set(recovery_dtbo_size, uint32_t);
|
|
hdr_get(recovery_dtbo_offset, uint32_t);
|
|
hdr_set(recovery_dtbo_offset, uint32_t);
|
|
hdr_get(header_size, uint32_t);
|
|
hdr_set(header_size, uint32_t);
|
|
|
|
uint32_t header_version() {
|
|
if (IS_PXA)
|
|
return 0;
|
|
uint32_t ver = static_cast<boot_img_hdr *>(hdr)->header_version;
|
|
// There won't be v4 header any time soon...
|
|
// If larger than 4, assume this field will be treated as extra_size
|
|
return ver > 4 ? 0 : ver;
|
|
}
|
|
|
|
uint32_t extra_size() {
|
|
// If header version > 0, we should treat this field as header_version
|
|
return header_version() ? 0 : dyn_access(extra_size);
|
|
}
|
|
|
|
size_t hdr_size() {
|
|
return IS_PXA ? sizeof(boot_img_hdr_pxa) : sizeof(boot_img_hdr);
|
|
}
|
|
};
|
|
|
|
#endif
|