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elf format

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This commit is contained in:
phcoder 2009-10-23 18:20:04 +02:00
parent 061282ed11
commit 5855d253f4
1 changed files with 119 additions and 14 deletions
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133
util/grub-mkrawimage.c
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@ -22,6 +22,8 @@
#include <grub/machine/boot.h>
#include <grub/machine/kernel.h>
#include <grub/machine/memory.h>
#include <grub/machine/machine.h>
#include <grub/elf.h>
#include <grub/kernel.h>
#include <grub/disk.h>
#include <grub/util/misc.h>
@ -91,7 +93,14 @@ compress_kernel (char *kernel_img, size_t kernel_size,
static void
generate_image (const char *dir, char *prefix, FILE *out, char *mods[],
char *memdisk_path, char *config_path)
char *memdisk_path, char *config_path,
#ifdef GRUB_PLATFORM_IMAGE_DEFAULT
grub_platform_image_format_t format
#else
int dummy __attribute__ ((unused))
#endif
)
{
char *kernel_img, *core_img;
size_t kernel_size, total_module_size, core_size;
@ -211,10 +220,9 @@ generate_image (const char *dir, char *prefix, FILE *out, char *mods[],
boot_img = grub_util_read_image (boot_path);
/* i386 is a little endian architecture. */
*((grub_uint16_t *) (boot_img + GRUB_DISK_SECTOR_SIZE
- GRUB_BOOT_MACHINE_LIST_SIZE + 8))
= grub_cpu_to_le16 (num);
= grub_host_to_target16 (num);
grub_util_write_image (boot_img, boot_size, out);
free (boot_img);
@ -238,12 +246,12 @@ generate_image (const char *dir, char *prefix, FILE *out, char *mods[],
memset (rom_img, 0, rom_size);
*((grub_int32_t *) (core_img + GRUB_KERNEL_MACHINE_CORE_ENTRY_ADDR))
= grub_cpu_to_le32 ((grub_uint32_t) -rom_size);
= grub_host_to_target32 ((grub_uint32_t) -rom_size);
memcpy (rom_img, core_img, core_size);
*((grub_int32_t *) (boot_img + GRUB_BOOT_MACHINE_CORE_ENTRY_ADDR))
= grub_cpu_to_le32 ((grub_uint32_t) -rom_size);
= grub_host_to_target32 ((grub_uint32_t) -rom_size);
memcpy (rom_img + rom_size - boot_size, boot_img, boot_size);
@ -254,18 +262,17 @@ generate_image (const char *dir, char *prefix, FILE *out, char *mods[],
free (boot_img);
free (boot_path);
}
#endif
#ifdef GRUB_KERNEL_MACHINE_TOTAL_MODULE_SIZE
*((grub_uint32_t *) (core_img + GRUB_KERNEL_MACHINE_TOTAL_MODULE_SIZE))
= grub_cpu_to_le32 (total_module_size);
= grub_host_to_target32 (total_module_size);
#endif
*((grub_uint32_t *) (core_img + GRUB_KERNEL_MACHINE_KERNEL_IMAGE_SIZE))
= grub_cpu_to_le32 (kernel_size);
= grub_host_to_target32 (kernel_size);
#ifdef GRUB_KERNEL_MACHINE_COMPRESSED_SIZE
*((grub_uint32_t *) (core_img + GRUB_KERNEL_MACHINE_COMPRESSED_SIZE))
= grub_cpu_to_le32 (core_size - GRUB_KERNEL_MACHINE_RAW_SIZE);
= grub_host_to_target32 (core_size - GRUB_KERNEL_MACHINE_RAW_SIZE);
#endif
#if defined(GRUB_KERNEL_MACHINE_INSTALL_DOS_PART) && defined(GRUB_KERNEL_MACHINE_INSTALL_BSD_PART)
@ -274,9 +281,9 @@ generate_image (const char *dir, char *prefix, FILE *out, char *mods[],
if (prefix[0] == '(')
{
*((grub_int32_t *) (core_img + GRUB_KERNEL_MACHINE_INSTALL_DOS_PART))
= grub_cpu_to_le32 (-2);
= grub_host_to_target32 (-2);
*((grub_int32_t *) (core_img + GRUB_KERNEL_MACHINE_INSTALL_BSD_PART))
= grub_cpu_to_le32 (-2);
= grub_host_to_target32 (-2);
}
#endif
@ -286,6 +293,68 @@ generate_image (const char *dir, char *prefix, FILE *out, char *mods[],
GRUB_KERNEL_MACHINE_LINK_ADDR + core_size, GRUB_MEMORY_MACHINE_UPPER);
#endif
#if defined(GRUB_MACHINE_MIPS)
if (format == GRUB_PLATFORM_IMAGE_ELF)
{
char *elf_img;
size_t program_size;
Elf32_Ehdr *ehdr;
Elf32_Phdr *phdr;
grub_uint32_t target_addr;
program_size = ALIGN_UP (core_size, 4);
elf_img = xmalloc (program_size + sizeof (*ehdr) + sizeof (*phdr));
memset (elf_img, 0, program_size + sizeof (*ehdr) + sizeof (*phdr));
memcpy (elf_img + sizeof (*ehdr) + sizeof (*phdr), core_img, core_size);
ehdr = (void *) elf_img;
phdr = (void *) (elf_img + sizeof (*ehdr));
memcpy (ehdr->e_ident, ELFMAG, SELFMAG);
ehdr->e_ident[EI_CLASS] = ELFCLASS32;
#ifdef GRUB_CPU_MIPSEL
ehdr->e_ident[EI_DATA] = ELFDATA2LSB;
#else
ehdr->e_ident[EI_DATA] = ELFDATA2MSB;
#endif
ehdr->e_ident[EI_VERSION] = EV_CURRENT;
ehdr->e_ident[EI_OSABI] = ELFOSABI_NONE;
ehdr->e_type = grub_host_to_target16 (ET_EXEC);
ehdr->e_machine = grub_host_to_target16 (EM_MIPS);
ehdr->e_version = grub_host_to_target32 (EV_CURRENT);
ehdr->e_phoff = grub_host_to_target32 ((char *) phdr - (char *) ehdr);
ehdr->e_phentsize = grub_host_to_target16 (sizeof (*phdr));
ehdr->e_phnum = grub_host_to_target16 (1);
/* No section headers. */
ehdr->e_shoff = grub_host_to_target32 (0);
ehdr->e_shentsize = grub_host_to_target16 (0);
ehdr->e_shnum = grub_host_to_target16 (0);
ehdr->e_shstrndx = grub_host_to_target16 (0);
ehdr->e_ehsize = grub_host_to_target16 (sizeof (*ehdr));
phdr->p_type = grub_host_to_target32 (PT_LOAD);
phdr->p_offset = grub_host_to_target32 (sizeof (*ehdr) + sizeof (*phdr));
phdr->p_flags = grub_host_to_target32 (PF_R | PF_W | PF_X);
target_addr = ALIGN_UP (GRUB_KERNEL_MACHINE_LINK_ADDR
+ kernel_size + total_module_size, 32);
ehdr->e_entry = grub_host_to_target32 (target_addr);
phdr->p_vaddr = grub_host_to_target32 (target_addr);
phdr->p_paddr = grub_host_to_target32 (target_addr);
phdr->p_align = grub_host_to_target32 (GRUB_KERNEL_MACHINE_LINK_ALIGN);
ehdr->e_flags = grub_host_to_target32 (0x1000 | EF_MIPS_NOREORDER
| EF_MIPS_PIC | EF_MIPS_CPIC);
phdr->p_filesz = grub_host_to_target32 (core_size);
phdr->p_memsz = grub_host_to_target32 (core_size);
free (core_img);
core_img = elf_img;
core_size = program_size + sizeof (*ehdr) + sizeof (*phdr);
}
#endif
grub_util_write_image (core_img, core_size, out);
free (kernel_img);
free (core_img);
@ -309,6 +378,9 @@ static struct option options[] =
{"memdisk", required_argument, 0, 'm'},
{"config", required_argument, 0, 'c'},
{"output", required_argument, 0, 'o'},
#ifdef GRUB_PLATFORM_IMAGE_DEFAULT
{"format", required_argument, 0, 'f'},
#endif
{"help", no_argument, 0, 'h'},
{"version", no_argument, 0, 'V'},
{"verbose", no_argument, 0, 'v'},
@ -330,7 +402,15 @@ Make a bootable image of GRUB.\n\
-p, --prefix=DIR set grub_prefix directory [default=%s]\n\
-m, --memdisk=FILE embed FILE as a memdisk image\n\
-c, --config=FILE embed FILE as boot config\n\
-o, --output=FILE output a generated image to FILE [default=stdout]\n\
-o, --output=FILE output a generated image to FILE [default=stdout]\n"
#ifdef GRUB_PLATFORM_IMAGE_DEFAULT
"\
-f, --format=FORMAT generate an image in format [default="
GRUB_PLATFORM_IMAGE_DEFAULT_FORMAT "]\n \
available formats: "
GRUB_PLATFORM_IMAGE_FORMATS "\n"
#endif
"\
-h, --help display this message and exit\n\
-V, --version print version information and exit\n\
-v, --verbose print verbose messages\n\
@ -350,12 +430,15 @@ main (int argc, char *argv[])
char *memdisk = NULL;
char *config = NULL;
FILE *fp = stdout;
#ifdef GRUB_PLATFORM_IMAGE_DEFAULT
grub_platform_image_format_t format = GRUB_PLATFORM_IMAGE_DEFAULT;
#endif
progname = "grub-mkimage";
while (1)
{
int c = getopt_long (argc, argv, "d:p:m:c:o:hVv", options, 0);
int c = getopt_long (argc, argv, "d:p:m:c:o:f:hVv", options, 0);
if (c == -1)
break;
@ -369,6 +452,22 @@ main (int argc, char *argv[])
output = xstrdup (optarg);
break;
#ifdef GRUB_PLATFORM_IMAGE_DEFAULT
case 'f':
#ifdef GRUB_PLATFORM_IMAGE_RAW
if (strcmp (optarg, "raw") == 0)
format = GRUB_PLATFORM_IMAGE_RAW;
else
#endif
#ifdef GRUB_PLATFORM_IMAGE_ELF
if (strcmp (optarg, "elf") == 0)
format = GRUB_PLATFORM_IMAGE_ELF;
else
#endif
usage (1);
break;
#endif
case 'd':
if (dir)
free (dir);
@ -429,7 +528,13 @@ main (int argc, char *argv[])
}
generate_image (dir ? : GRUB_LIBDIR, prefix ? : DEFAULT_DIRECTORY, fp,
argv + optind, memdisk, config);
argv + optind, memdisk, config,
#ifdef GRUB_PLATFORM_IMAGE_DEFAULT
format
#else
0
#endif
);
fclose (fp);