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Support header_version 3

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topjohnwu
2020-10-12 01:06:42 -07:00
parent d625beb7f3
commit 4aeac3b8f4
3 changed files with 227 additions and 162 deletions
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239
native/jni/magiskboot/bootimg.hpp
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@@ -4,9 +4,9 @@
#include <utility>
#include "format.hpp"
/****************
* Other Headers
****************/
/******************
* Special Headers
*****************/
struct mtk_hdr {
uint32_t magic; /* MTK magic */
@@ -45,8 +45,39 @@ struct blob_hdr {
* Boot Image Headers
*********************/
struct boot_img_hdr_base {
char magic[8];
#define BOOT_MAGIC_SIZE 8
#define BOOT_NAME_SIZE 16
#define BOOT_ID_SIZE 32
#define BOOT_ARGS_SIZE 512
#define BOOT_EXTRA_ARGS_SIZE 1024
/*
* +-----------------+
* | boot header | 1 page
* +-----------------+
* | kernel | n pages
* +-----------------+
* | ramdisk | m pages
* +-----------------+
* | second stage | o pages
* +-----------------+
* | extra blob | x pages (non standard)
* +-----------------+
* | recovery dtbo | p pages
* +-----------------+
* | dtb | 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 = (recovery_dtbo_size + page_size - 1) / page_size
* q = (dtb_size + page_size - 1) / page_size
* x = (extra_size + page_size - 1) / page_size
*/
struct boot_img_hdr_common {
char magic[BOOT_MAGIC_SIZE];
uint32_t kernel_size; /* size in bytes */
uint32_t kernel_addr; /* physical load addr */
@@ -58,32 +89,31 @@ struct boot_img_hdr_base {
uint32_t second_addr; /* physical load addr */
} __attribute__((packed));
struct boot_img_hdr_v0 : public boot_img_hdr_base {
struct boot_img_hdr_v0 : public boot_img_hdr_common {
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 */
// In header v1, this field is used for header version
// However, on some devices like Samsung, this field is used to store DTB
// We 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 */
// Operating system version and security patch level.
// For version "A.B.C" and patch level "Y-M-D":
// (7 bits for each of A, B, C; 7 bits for (Y-2000), 4 bits for M)
// os_version = A[31:25] B[24:18] C[17:11] (Y-2000)[10:4] M[3:0]
uint32_t os_version;
char name[16]; /* asciiz product name */
char cmdline[512];
char id[32]; /* timestamp / checksum / sha1 / etc */
char name[BOOT_NAME_SIZE]; /* asciiz product name */
char cmdline[BOOT_ARGS_SIZE];
char id[BOOT_ID_SIZE]; /* timestamp / checksum / sha1 / etc */
/* Supplemental command line data; kept here to maintain
* binary compatibility with older versions of mkbootimg */
char extra_cmdline[1024];
// Supplemental command line data; kept here to maintain
// binary compatibility with older versions of mkbootimg.
char extra_cmdline[BOOT_EXTRA_ARGS_SIZE];
} __attribute__((packed));
struct boot_img_hdr_v1 : public boot_img_hdr_v0 {
@@ -101,59 +131,54 @@ struct boot_img_hdr_v2 : public boot_img_hdr_v1 {
using boot_img_hdr = boot_img_hdr_v2;
// Special Samsung header
struct boot_img_hdr_pxa : public boot_img_hdr_base {
struct boot_img_hdr_pxa : public boot_img_hdr_common {
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 */
char cmdline[BOOT_ARGS_SIZE];
char id[BOOT_ID_SIZE]; /* timestamp / checksum / sha1 / etc */
/* Supplemental command line data; kept here to maintain
* binary compatibility with older versions of mkbootimg */
char extra_cmdline[1024];
char extra_cmdline[BOOT_EXTRA_ARGS_SIZE];
} __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
*/
/* When the boot image header has a version of 3, the structure of the boot
* image is as follows:
*
* +---------------------+
* | boot header | 4096 bytes
* +---------------------+
* | kernel | m pages
* +---------------------+
* | ramdisk | n pages
* +---------------------+
*
* m = (kernel_size + 4096 - 1) / 4096
* n = (ramdisk_size + 4096 - 1) / 4096
*
* Note that in version 3 of the boot image header, page size is fixed at 4096 bytes.
*/
struct boot_img_hdr_v3 {
uint8_t magic[BOOT_MAGIC_SIZE];
uint32_t kernel_size; /* size in bytes */
uint32_t ramdisk_size; /* size in bytes */
uint32_t os_version;
uint32_t header_size;
uint32_t reserved[4];
uint32_t header_version;
char cmdline[BOOT_ARGS_SIZE + BOOT_EXTRA_ARGS_SIZE];
} __attribute__((packed));
/*******************************
* Polymorphic Universal Header
*******************************/
#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) \
@@ -161,12 +186,10 @@ 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(kernel_size, 32)
decl_var(ramdisk_size, 32)
decl_var(second_size, 32)
decl_var(page_size, 32)
decl_val(header_version, uint32_t)
decl_var(extra_size, 32)
@@ -188,20 +211,16 @@ struct dyn_img_hdr {
virtual size_t hdr_size() = 0;
boot_img_hdr_base * const &operator* () const {
return img_hdr;
}
const void *raw_hdr() const { return raw; }
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 */
// Main header could be either AOSP or PXA
boot_img_hdr_v2 *v2_hdr; /* AOSP v2 header */
boot_img_hdr_v3 *v3_hdr; /* AOSP v3 header */
boot_img_hdr_pxa *hdr_pxa; /* Samsung PXA header */
void *raw; /* Raw pointer */
};
@@ -212,7 +231,6 @@ private:
static uint64_t j64;
};
#undef drct_var
#undef decl_var
#undef decl_val
@@ -227,25 +245,16 @@ 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 {
struct dyn_img_common : public dyn_img_hdr {
impl_val(kernel_size)
impl_val(ramdisk_size)
impl_val(second_size)
};
struct dyn_img_v0 : public dyn_img_common {
impl_cls(v0)
impl_val(page_size)
@@ -265,9 +274,7 @@ struct dyn_img_v1 : public dyn_img_v0 {
impl_val(recovery_dtbo_offset)
impl_val(header_size)
uint32_t &extra_size() override {
return dyn_img_hdr::extra_size();
}
uint32_t &extra_size() override { return dyn_img_hdr::extra_size(); }
};
struct dyn_img_v2 : public dyn_img_v1 {
@@ -276,11 +283,51 @@ struct dyn_img_v2 : public dyn_img_v1 {
impl_val(dtb_size)
};
#undef impl_val
#define impl_val(name) \
decltype(std::declval<dyn_img_hdr>().name()) name() override { return hdr_pxa->name; }
struct dyn_img_pxa : public dyn_img_common {
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 v3_hdr->name; }
struct dyn_img_v3 : public dyn_img_hdr {
impl_cls(v3)
impl_val(kernel_size)
impl_val(ramdisk_size)
impl_val(os_version)
impl_val(header_size)
impl_val(header_version)
impl_val(cmdline)
// Make API compatible
uint32_t &page_size() override { page_sz = 4096; return page_sz; }
char *extra_cmdline() override { return &v3_hdr->cmdline[BOOT_ARGS_SIZE]; }
private:
uint32_t page_sz;
};
#undef __impl_cls
#undef impl_cls
#undef impl_val
// Flags
/******************
* Full Boot Image
******************/
#define MTK_KERNEL (1 << 0)
#define MTK_RAMDISK (1 << 1)
#define CHROMEOS_FLAG (1 << 2)