bin_bootimg.c File Reference

#include <rz_types.h>
#include <rz_util.h>
#include <rz_lib.h>
#include <rz_bin.h>

Go to the source code of this file.

Classes
struct	BootImageObj

Macros
#define	BOOT_MAGIC   "ANDROID!"
#define	BOOT_MAGIC_SIZE   8
#define	BOOT_NAME_SIZE   16
#define	BOOT_ARGS_SIZE   512
#define	BOOT_EXTRA_ARGS_SIZE   1024
#define	ADD_REMAINDER(val, aln)   ((val) + ((aln) != 0 ? ((val) % (aln)) : 0))
#define	ROUND_DOWN(val, aln)   ((aln) != 0 ? (((val) / (aln)) * (aln)) : (val))

Typedefs
typedef struct boot_img_hdr	BootImage

Functions
	RZ_PACKED (struct boot_img_hdr { ut8 magic[BOOT_MAGIC_SIZE];ut32 kernel_size;ut32 kernel_addr;ut32 ramdisk_size;ut32 ramdisk_addr;ut32 second_size;ut32 second_addr;ut32 tags_addr;ut32 page_size;ut32 unused[2];ut8 name[BOOT_NAME_SIZE];ut8 cmdline[BOOT_ARGS_SIZE];ut32 id[8];ut8 extra_cmdline[BOOT_EXTRA_ARGS_SIZE];})
static int	bootimg_header_load (BootImageObj *obj, Sdb *db)
static Sdb *	get_sdb (RzBinFile *bf)
static bool	load_buffer (RzBinFile *bf, RzBinObject *obj, RzBuffer *buf, Sdb *sdb)
static void	destroy (RzBinFile *bf)
static ut64	baddr (RzBinFile *bf)
static RzList *	strings (RzBinFile *bf)
static RzBinInfo *	info (RzBinFile *bf)
static bool	check_buffer (RzBuffer *buf)
static RzList *	entries (RzBinFile *bf)
static RzList *	sections (RzBinFile *bf)

Variables
RzBinPlugin	rz_bin_plugin_bootimg
RZ_API RzLibStruct	rizin_plugin

Macro Definition Documentation

ADD_REMAINDER

#define ADD_REMAINDER	(		val,
			aln
	)		((val) + ((aln) != 0 ? ((val) % (aln)) : 0))

Definition at line 17 of file bin_bootimg.c.

BOOT_ARGS_SIZE

#define BOOT_ARGS_SIZE   512

Definition at line 14 of file bin_bootimg.c.

BOOT_EXTRA_ARGS_SIZE

#define BOOT_EXTRA_ARGS_SIZE   1024

Definition at line 15 of file bin_bootimg.c.

BOOT_MAGIC

#define BOOT_MAGIC   "ANDROID!"

Definition at line 11 of file bin_bootimg.c.

BOOT_MAGIC_SIZE

#define BOOT_MAGIC_SIZE   8

Definition at line 12 of file bin_bootimg.c.

BOOT_NAME_SIZE

#define BOOT_NAME_SIZE   16

Definition at line 13 of file bin_bootimg.c.

ROUND_DOWN

#define ROUND_DOWN	(		val,
			aln
	)		((aln) != 0 ? (((val) / (aln)) * (aln)) : (val))

Definition at line 18 of file bin_bootimg.c.

Typedef Documentation

BootImage

typedef struct boot_img_hdr BootImage

Definition at line 1 of file bin_bootimg.c.

Function Documentation

baddr()

static ut64 baddr ( RzBinFile *  bf )

static

Definition at line 114 of file bin_bootimg.c.

                                 {
    BootImageObj *bio = bf->o->bin_obj;
    return bio ? bio->bi.kernel_addr : 0;
}

References BootImageObj::bi, rz_bin_object_t::bin_obj, and rz_bin_file_t::o.

bootimg_header_load()

static int bootimg_header_load ( BootImageObj *  obj, Sdb *  db  )

static

Definition at line 51 of file bin_bootimg.c.

                                                           {
    char *n;
    int i;
    if (rz_buf_size(obj->buf) < sizeof(BootImage)) {
        return false;
    }
    // TODO make it endian-safe (void)rz_buf_fread_at (buf, 0, (ut8*)bi, "IIiiiiiiiiiiii", 1);
    BootImage *bi = &obj->bi;
    (void)rz_buf_read_at(obj->buf, 0, (ut8 *)bi, sizeof(BootImage));
    if ((n = rz_str_ndup((char *)bi->name, BOOT_NAME_SIZE))) {
        sdb_set(db, "name", n, 0);
        free(n);
    }
    if ((n = rz_str_ndup((char *)bi->cmdline, BOOT_ARGS_SIZE))) {
        sdb_set(db, "cmdline", n, 0);
        free(n);
    }
    for (i = 0; i < 8; i++) {
        sdb_num_set(db, "id", (ut64)bi->id[i], 0);
    }
    if ((n = rz_str_ndup((char *)bi->extra_cmdline, BOOT_EXTRA_ARGS_SIZE))) {
        sdb_set(db, "extra_cmdline", n, 0);
        free(n);
    }
    return true;
}

References BootImageObj::bi, BOOT_ARGS_SIZE, BOOT_EXTRA_ARGS_SIZE, BOOT_NAME_SIZE, BootImageObj::buf, free(), i, n, rz_buf_read_at(), rz_buf_size(), rz_str_ndup(), sdb_num_set(), sdb_set(), and ut64().

Referenced by load_buffer().

check_buffer()

static bool check_buffer ( RzBuffer *  buf )

static

Definition at line 149 of file bin_bootimg.c.

                                        {
    ut8 tmp[13];
    int r = rz_buf_read_at(buf, 0, tmp, sizeof(tmp));
    return r > 12 && !strncmp((const char *)tmp, "ANDROID!", 8);
}

References r, rz_buf_read_at(), and autogen_x86imm::tmp.

destroy()

static void destroy ( RzBinFile *  bf )

static

Definition at line 108 of file bin_bootimg.c.

                                   {
    BootImageObj *bio = bf->o->bin_obj;
    rz_buf_free(bio->buf);
    RZ_FREE(bf->o->bin_obj);
}

References rz_bin_object_t::bin_obj, BootImageObj::buf, rz_bin_file_t::o, rz_buf_free(), and RZ_FREE.

entries()

static RzList* entries ( RzBinFile *  bf )

static

Definition at line 155 of file bin_bootimg.c.

                                      {
    BootImageObj *bio = bf->o->bin_obj;
    RzBinAddr *ptr = NULL;
    if (!bio) {
        return NULL;
    }
    BootImage *bi = &bio->bi;
    RzList *ret;
 
    if (!(ret = rz_list_newf(free))) {
        return NULL;
    }
    if (!(ptr = RZ_NEW0(RzBinAddr))) {
        return ret;
    }
    ptr->paddr = bi->page_size;
    ptr->vaddr = bi->kernel_addr;
    rz_list_append(ret, ptr);
    return ret;
}

References BootImageObj::bi, rz_bin_object_t::bin_obj, free(), NULL, rz_bin_file_t::o, rz_bin_addr_t::paddr, rz_list_append(), rz_list_newf(), RZ_NEW0, and rz_bin_addr_t::vaddr.

get_sdb()

static Sdb* get_sdb ( RzBinFile *  bf )

static

Definition at line 78 of file bin_bootimg.c.

                                   {
    RzBinObject *o = bf->o;
    BootImageObj *ao;
    if (!o) {
        return NULL;
    }
    ao = o->bin_obj;
    return ao ? ao->kv : NULL;
}

References rz_bin_object_t::bin_obj, BootImageObj::kv, NULL, and rz_bin_file_t::o.

info()

static RzBinInfo* info ( RzBinFile *  bf )

static

Definition at line 123 of file bin_bootimg.c.

                                      {
    RzBinInfo *ret;
    if (!bf || !bf->o || !bf->o->bin_obj) {
        return NULL;
    }
    ret = RZ_NEW0(RzBinInfo);
    if (!ret) {
        return NULL;
    }
 
    ret->lang = NULL;
    ret->file = bf->file ? strdup(bf->file) : NULL;
    ret->type = strdup("Android Boot Image");
    ret->os = strdup("android");
    ret->subsystem = strdup("unknown");
    ret->machine = strdup("arm");
    ret->arch = strdup("arm");
    ret->has_va = 1;
    ret->has_pi = 0;
    ret->bits = 16;
    ret->big_endian = 0;
    ret->dbg_info = 0;
    ret->rclass = strdup("image");
    return ret;
}

References rz_bin_info_t::arch, rz_bin_info_t::big_endian, rz_bin_object_t::bin_obj, rz_bin_info_t::bits, rz_bin_info_t::dbg_info, rz_bin_info_t::file, rz_bin_file_t::file, rz_bin_info_t::has_pi, rz_bin_info_t::has_va, rz_bin_info_t::lang, rz_bin_info_t::machine, NULL, rz_bin_file_t::o, rz_bin_info_t::os, rz_bin_info_t::rclass, RZ_NEW0, strdup(), rz_bin_info_t::subsystem, and rz_bin_info_t::type.

load_buffer()

static bool load_buffer ( RzBinFile *  bf, RzBinObject *  obj, RzBuffer *  buf, Sdb *  sdb  )

static

Definition at line 88 of file bin_bootimg.c.

                                                                                  {
    BootImageObj *bio = RZ_NEW0(BootImageObj);
    if (!bio) {
        return false;
    }
    bio->kv = sdb_new0();
    if (!bio->kv) {
        free(bio);
        return false;
    }
    bio->buf = rz_buf_ref(buf);
    if (!bootimg_header_load(bio, bio->kv)) {
        free(bio);
        return false;
    }
    sdb_ns_set(sdb, "info", bio->kv);
    obj->bin_obj = bio;
    return true;
}

References rz_bin_object_t::bin_obj, bootimg_header_load(), BootImageObj::buf, free(), BootImageObj::kv, rz_buf_ref(), RZ_NEW0, sdb_new0(), and sdb_ns_set().

RZ_PACKED()

RZ_PACKED

(

struct boot_img_hdr { ut8 magic[BOOT_MAGIC_SIZE];ut32 kernel_size;ut32 kernel_addr;ut32 ramdisk_size;ut32 ramdisk_addr;ut32 second_size;ut32 second_addr;ut32 tags_addr;ut32 page_size;ut32 unused[2];ut8 name[BOOT_NAME_SIZE];ut8 cmdline[BOOT_ARGS_SIZE];ut32 id[8];ut8 extra_cmdline[BOOT_EXTRA_ARGS_SIZE];}

)

References BOOT_ARGS_SIZE, BOOT_EXTRA_ARGS_SIZE, BOOT_MAGIC_SIZE, and BOOT_NAME_SIZE.

sections()

static RzList* sections ( RzBinFile *  bf )

static

Definition at line 176 of file bin_bootimg.c.

                                       {
    BootImageObj *bio = bf->o->bin_obj;
    if (!bio) {
        return NULL;
    }
    BootImage *bi = &bio->bi;
    RzList *ret = NULL;
    RzBinSection *ptr = NULL;
 
    if (!(ret = rz_list_new())) {
        return NULL;
    }
    ret->free = free;
 
    if (!(ptr = RZ_NEW0(RzBinSection))) {
        return ret;
    }
    ptr->name = strdup("header");
    ptr->size = sizeof(BootImage);
    ptr->vsize = bi->page_size;
    ptr->paddr = 0;
    ptr->vaddr = 0;
    ptr->perm = RZ_PERM_R; // r--
    rz_list_append(ret, ptr);
 
    if (!(ptr = RZ_NEW0(RzBinSection))) {
        return ret;
    }
    ptr->name = strdup("kernel");
    ptr->size = bi->kernel_size;
    ptr->vsize = ADD_REMAINDER(ptr->size, bi->page_size);
    ptr->paddr = bi->page_size;
    ptr->vaddr = bi->kernel_addr;
    ptr->perm = RZ_PERM_R; // r--
    rz_list_append(ret, ptr);
 
    if (bi->ramdisk_size > 0) {
        ut64 base = bi->kernel_size + 2 * bi->page_size - 1;
        if (!(ptr = RZ_NEW0(RzBinSection))) {
            return ret;
        }
        ptr->name = strdup("ramdisk");
        ptr->size = bi->ramdisk_size;
        ptr->vsize = ADD_REMAINDER(bi->ramdisk_size, bi->page_size);
        ptr->paddr = ROUND_DOWN(base, bi->page_size);
        ptr->vaddr = bi->ramdisk_addr;
        ptr->perm = RZ_PERM_RX; // r-x
        rz_list_append(ret, ptr);
    }
 
    if (bi->second_size > 0) {
        ut64 base = bi->kernel_size + bi->ramdisk_size + 2 * bi->page_size - 1;
        if (!(ptr = RZ_NEW0(RzBinSection))) {
            return ret;
        }
        ptr->name = strdup("second");
        ptr->size = bi->second_size;
        ptr->vsize = ADD_REMAINDER(bi->second_size, bi->page_size);
        ptr->paddr = ROUND_DOWN(base, bi->page_size);
        ptr->vaddr = bi->second_addr;
        ptr->perm = RZ_PERM_RX; // r-x
        rz_list_append(ret, ptr);
    }
 
    return ret;
}

References ADD_REMAINDER, BootImageObj::bi, rz_bin_object_t::bin_obj, rz_list_t::free, free(), rz_bin_section_t::name, NULL, rz_bin_file_t::o, rz_bin_section_t::paddr, rz_bin_section_t::perm, ROUND_DOWN, rz_list_append(), rz_list_new(), RZ_NEW0, RZ_PERM_R, RZ_PERM_RX, rz_bin_section_t::size, strdup(), ut64(), rz_bin_section_t::vaddr, and rz_bin_section_t::vsize.

strings()

static RzList* strings ( RzBinFile *  bf )

static

Definition at line 119 of file bin_bootimg.c.

                                      {
    return NULL;
}

References NULL.

Variable Documentation

rizin_plugin

RZ_API RzLibStruct rizin_plugin

Initial value:

= {
    .type = RZ_LIB_TYPE_BIN,
    .data = &rz_bin_plugin_bootimg,
    .version = RZ_VERSION
}

Definition at line 260 of file bin_bootimg.c.

rz_bin_plugin_bootimg

RzBinPlugin rz_bin_plugin_bootimg

Initial value:

= {
    .name = "bootimg",
    .desc = "Android Boot Image",
    .license = "LGPL3",
    .get_sdb = &get_sdb,
    .load_buffer = &load_buffer,
    .destroy = &destroy,
    .check_buffer = &check_buffer,
    .baddr = &baddr,
    .maps = rz_bin_maps_of_file_sections,
    .sections = &sections,
    .entries = entries,
    .strings = &strings,
    .info = &info,
}

Definition at line 243 of file bin_bootimg.c.