grub/grub-core/loader/machoXX.c

385 lines
9.8 KiB
C
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#include <grub/file.h>
#include <grub/mm.h>
#include <grub/misc.h>
#include <grub/i18n.h>
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#define min(a,b) (((a) < (b)) ? (a) : (b))
static int
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SUFFIX (grub_macho_contains_macho) (grub_macho_t macho)
{
return macho->offsetXX != -1;
}
void
SUFFIX (grub_macho_parse) (grub_macho_t macho, const char *filename)
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{
union {
struct grub_macho_lzss_header lzss;
grub_macho_header_t macho;
} head;
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/* Is there any candidate at all? */
if (macho->offsetXX == -1)
return;
/* Read header and check magic. */
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if (grub_file_seek (macho->file, macho->offsetXX) == (grub_off_t) -1
|| grub_file_read (macho->file, &head, sizeof (head))
!= sizeof (head))
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{
if (!grub_errno)
grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
filename);
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macho->offsetXX = -1;
return;
}
if (grub_memcmp (head.lzss.magic, GRUB_MACHO_LZSS_MAGIC,
sizeof (head.lzss.magic)) == 0)
{
macho->compressed_sizeXX = grub_be_to_cpu32 (head.lzss.compressed_size);
macho->uncompressed_sizeXX
= grub_be_to_cpu32 (head.lzss.uncompressed_size);
if (macho->uncompressed_sizeXX < sizeof (head.macho))
{
grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
filename);
macho->offsetXX = -1;
return;
}
/* Skip header check. */
macho->compressedXX = 1;
return;
}
if (head.macho.magic != GRUB_MACHO_MAGIC)
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{
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grub_error (GRUB_ERR_BAD_OS, "invalid Mach-O header");
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macho->offsetXX = -1;
return;
}
/* Read commands. */
macho->ncmdsXX = head.macho.ncmds;
macho->cmdsizeXX = head.macho.sizeofcmds;
macho->cmdsXX = grub_malloc (macho->cmdsizeXX);
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if (! macho->cmdsXX)
return;
if (grub_file_seek (macho->file, macho->offsetXX
+ sizeof (grub_macho_header_t)) == (grub_off_t) -1
|| grub_file_read (macho->file, macho->cmdsXX,
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(grub_size_t) macho->cmdsizeXX)
!= (grub_ssize_t) macho->cmdsizeXX)
{
if (!grub_errno)
grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
filename);
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macho->offsetXX = -1;
}
}
typedef int (*grub_macho_iter_hook_t)
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(grub_macho_t , struct grub_macho_cmd *,
void *);
static grub_err_t
grub_macho_cmds_iterate (grub_macho_t macho,
grub_macho_iter_hook_t hook,
void *hook_arg,
const char *filename)
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{
grub_uint8_t *hdrs;
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int i;
if (macho->compressedXX && !macho->uncompressedXX)
{
grub_uint8_t *tmp;
grub_macho_header_t *head;
macho->uncompressedXX = grub_malloc (macho->uncompressed_sizeXX);
if (!macho->uncompressedXX)
return grub_errno;
tmp = grub_malloc (macho->compressed_sizeXX);
if (!tmp)
{
grub_free (macho->uncompressedXX);
macho->uncompressedXX = 0;
return grub_errno;
}
if (grub_file_seek (macho->file, macho->offsetXX
+ GRUB_MACHO_LZSS_OFFSET) == (grub_off_t) -1
|| grub_file_read (macho->file, tmp,
(grub_size_t) macho->compressed_sizeXX)
!= (grub_ssize_t) macho->compressed_sizeXX)
{
if (!grub_errno)
grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
filename);
grub_free (tmp);
grub_free (macho->uncompressedXX);
macho->uncompressedXX = 0;
macho->offsetXX = -1;
return grub_errno;
}
if (grub_decompress_lzss (macho->uncompressedXX,
macho->uncompressedXX
+ macho->uncompressed_sizeXX,
tmp, tmp + macho->compressed_sizeXX)
!= macho->uncompressed_sizeXX)
{
if (!grub_errno)
grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
filename);
grub_free (tmp);
grub_free (macho->uncompressedXX);
macho->uncompressedXX = 0;
macho->offsetXX = -1;
return grub_errno;
}
grub_free (tmp);
head = (grub_macho_header_t *) macho->uncompressedXX;
macho->ncmdsXX = head->ncmds;
macho->cmdsizeXX = head->sizeofcmds;
macho->cmdsXX = macho->uncompressedXX + sizeof (grub_macho_header_t);
if (sizeof (grub_macho_header_t) + macho->cmdsizeXX
>= macho->uncompressed_sizeXX)
{
grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
filename);
grub_free (macho->uncompressedXX);
macho->uncompressedXX = 0;
macho->offsetXX = -1;
return grub_errno;
}
}
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if (! macho->cmdsXX)
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return grub_error (GRUB_ERR_BAD_OS, "couldn't find Mach-O commands");
hdrs = macho->cmdsXX;
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for (i = 0; i < macho->ncmdsXX; i++)
{
struct grub_macho_cmd *hdr = (struct grub_macho_cmd *) hdrs;
if (hook (macho, hdr, hook_arg))
break;
hdrs += hdr->cmdsize;
}
return grub_errno;
}
grub_size_t
SUFFIX (grub_macho_filesize) (grub_macho_t macho)
{
if (SUFFIX (grub_macho_contains_macho) (macho))
return macho->endXX - macho->offsetXX;
return 0;
}
grub_err_t
SUFFIX (grub_macho_readfile) (grub_macho_t macho,
const char *filename,
void *dest)
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{
grub_ssize_t read;
if (! SUFFIX (grub_macho_contains_macho) (macho))
return grub_error (GRUB_ERR_BAD_OS,
2009-12-24 Carles Pina i Estany <carles@pina.cat> * bus/usb/usbhub.c: Fix capitalization, fullstop and newlines in grub_errno calls. * commands/acpi.c: Likewise. * commands/blocklist.c: Likewise. * commands/efi/loadbios.c: Likewise. * commands/i386/pc/drivemap.c: Likewise. * commands/loadenv.c: Likewise. * commands/memrw.c: Likewise. * commands/password.c: Likewise. * commands/videotest.c: Likewise. * disk/ata.c: Likewise. * disk/ata_pthru.c: Likewise. * disk/dmraid_nvidia.c: Likewise. * disk/ieee1275/nand.c: Likewise. * disk/ieee1275/ofdisk.c: Likewise. * disk/loopback.c: Likewise. * disk/lvm.c: Likewise. * disk/mdraid_linux.c: Likewise. * disk/raid.c: Likewise. * disk/raid6_recover.c: Likewise. * disk/scsi.c: Likewise. * efiemu/main.c: Likewise. * efiemu/mm.c: Likewise. * efiemu/pnvram.c: Likewise. * efiemu/symbols.c: Likewise. * font/font.c: Likewise. * fs/cpio.c: Likewise. * fs/hfsplus.c: Likewise. * fs/iso9660.c: Likewise. * fs/jfs.c: Likewise. * fs/minix.c: Likewise. * fs/ntfs.c: Likewise. * fs/ntfscomp.c: Likewise. * fs/reiserfs.c: Likewise. * fs/ufs.c: Likewise. * fs/xfs.c: Likewise. * gettext/gettext.c: Likewise. * include/grub/auth.h: Likewise. * kern/elf.c: Likewise. * kern/file.c: Likewise. * kern/ieee1275/init.c: Likewise. * kern/ieee1275/mmap.c: Likewise. * kern/ieee1275/openfw.c: Likewise. * kern/powerpc/dl.c: Likewise. * kern/sparc64/dl.c: Likewise. * lib/arg.c: Likewise. * loader/i386/bsd.c: Likewise. * loader/i386/bsdXX.c: Likewise. * loader/i386/efi/linux.c: Likewise. * loader/i386/efi/xnu.c: Likewise. * loader/i386/ieee1275/linux.c: Likewise. * loader/i386/linux.c: Likewise. * loader/i386/multiboot.c: Likewise. * loader/i386/pc/linux.c: Likewise. * loader/i386/pc/multiboot2.c: Likewise. * loader/i386/xnu.c: Likewise. * loader/ieee1275/multiboot2.c: Likewise. * loader/macho.c: Likewise. * loader/machoXX.c: Likewise. * loader/multiboot2.c: Likewise. * loader/multiboot_loader.c: Likewise. * loader/powerpc/ieee1275/linux.c: Likewise. * loader/sparc64/ieee1275/linux.c: Likewise. * loader/xnu.c: Likewise. * loader/xnu_resume.c: Likewise. * mmap/i386/pc/mmap.c: Likewise. * normal/menu_viewer.c: Likewise. * partmap/acorn.c: Likewise. * partmap/amiga.c: Likewise. * partmap/apple.c: Likewise. * script/lexer.c: Likewise. * term/gfxterm.c: Likewise. * term/i386/pc/serial.c: Likewise. * term/i386/pc/vga.c: Likewise. * term/ieee1275/ofconsole.c: Likewise. * term/terminfo.c: Likewise. * video/bitmap.c: Likewise. * video/efi_gop.c: Likewise. * video/efi_uga.c: Likewise. * video/fb/video_fb.c: Likewise. * video/i386/pc/vbe.c: Likewise. * video/readers/tga.c: Likewise. * video/video.c: Likewise.
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"couldn't read architecture-specific part");
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if (grub_file_seek (macho->file, macho->offsetXX) == (grub_off_t) -1)
return grub_errno;
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read = grub_file_read (macho->file, dest,
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macho->endXX - macho->offsetXX);
if (read != (grub_ssize_t) (macho->endXX - macho->offsetXX))
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{
if (!grub_errno)
grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
filename);
return grub_errno;
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}
return GRUB_ERR_NONE;
}
struct calcsize_ctx
{
int flags;
int nr_phdrs;
grub_macho_addr_t *segments_start;
grub_macho_addr_t *segments_end;
};
/* Run through the program headers to calculate the total memory size we
should claim. */
static int
calcsize (grub_macho_t _macho __attribute__ ((unused)),
struct grub_macho_cmd *hdr0,
void *_arg)
{
grub_macho_segment_t *hdr = (grub_macho_segment_t *) hdr0;
struct calcsize_ctx *ctx = _arg;
if (hdr->cmd != GRUB_MACHO_CMD_SEGMENT)
return 0;
if (! hdr->vmsize)
return 0;
if (! hdr->filesize && (ctx->flags & GRUB_MACHO_NOBSS))
return 0;
ctx->nr_phdrs++;
if (hdr->vmaddr < *ctx->segments_start)
*ctx->segments_start = hdr->vmaddr;
if (hdr->vmaddr + hdr->vmsize > *ctx->segments_end)
*ctx->segments_end = hdr->vmaddr + hdr->vmsize;
return 0;
}
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/* Calculate the amount of memory spanned by the segments. */
grub_err_t
SUFFIX (grub_macho_size) (grub_macho_t macho, grub_macho_addr_t *segments_start,
grub_macho_addr_t *segments_end, int flags,
const char *filename)
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{
struct calcsize_ctx ctx = {
.flags = flags,
.nr_phdrs = 0,
.segments_start = segments_start,
.segments_end = segments_end,
};
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*segments_start = (grub_macho_addr_t) -1;
*segments_end = 0;
grub_macho_cmds_iterate (macho, calcsize, &ctx, filename);
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if (ctx.nr_phdrs == 0)
2009-12-24 Carles Pina i Estany <carles@pina.cat> * bus/usb/usbhub.c: Fix capitalization, fullstop and newlines in grub_errno calls. * commands/acpi.c: Likewise. * commands/blocklist.c: Likewise. * commands/efi/loadbios.c: Likewise. * commands/i386/pc/drivemap.c: Likewise. * commands/loadenv.c: Likewise. * commands/memrw.c: Likewise. * commands/password.c: Likewise. * commands/videotest.c: Likewise. * disk/ata.c: Likewise. * disk/ata_pthru.c: Likewise. * disk/dmraid_nvidia.c: Likewise. * disk/ieee1275/nand.c: Likewise. * disk/ieee1275/ofdisk.c: Likewise. * disk/loopback.c: Likewise. * disk/lvm.c: Likewise. * disk/mdraid_linux.c: Likewise. * disk/raid.c: Likewise. * disk/raid6_recover.c: Likewise. * disk/scsi.c: Likewise. * efiemu/main.c: Likewise. * efiemu/mm.c: Likewise. * efiemu/pnvram.c: Likewise. * efiemu/symbols.c: Likewise. * font/font.c: Likewise. * fs/cpio.c: Likewise. * fs/hfsplus.c: Likewise. * fs/iso9660.c: Likewise. * fs/jfs.c: Likewise. * fs/minix.c: Likewise. * fs/ntfs.c: Likewise. * fs/ntfscomp.c: Likewise. * fs/reiserfs.c: Likewise. * fs/ufs.c: Likewise. * fs/xfs.c: Likewise. * gettext/gettext.c: Likewise. * include/grub/auth.h: Likewise. * kern/elf.c: Likewise. * kern/file.c: Likewise. * kern/ieee1275/init.c: Likewise. * kern/ieee1275/mmap.c: Likewise. * kern/ieee1275/openfw.c: Likewise. * kern/powerpc/dl.c: Likewise. * kern/sparc64/dl.c: Likewise. * lib/arg.c: Likewise. * loader/i386/bsd.c: Likewise. * loader/i386/bsdXX.c: Likewise. * loader/i386/efi/linux.c: Likewise. * loader/i386/efi/xnu.c: Likewise. * loader/i386/ieee1275/linux.c: Likewise. * loader/i386/linux.c: Likewise. * loader/i386/multiboot.c: Likewise. * loader/i386/pc/linux.c: Likewise. * loader/i386/pc/multiboot2.c: Likewise. * loader/i386/xnu.c: Likewise. * loader/ieee1275/multiboot2.c: Likewise. * loader/macho.c: Likewise. * loader/machoXX.c: Likewise. * loader/multiboot2.c: Likewise. * loader/multiboot_loader.c: Likewise. * loader/powerpc/ieee1275/linux.c: Likewise. * loader/sparc64/ieee1275/linux.c: Likewise. * loader/xnu.c: Likewise. * loader/xnu_resume.c: Likewise. * mmap/i386/pc/mmap.c: Likewise. * normal/menu_viewer.c: Likewise. * partmap/acorn.c: Likewise. * partmap/amiga.c: Likewise. * partmap/apple.c: Likewise. * script/lexer.c: Likewise. * term/gfxterm.c: Likewise. * term/i386/pc/serial.c: Likewise. * term/i386/pc/vga.c: Likewise. * term/ieee1275/ofconsole.c: Likewise. * term/terminfo.c: Likewise. * video/bitmap.c: Likewise. * video/efi_gop.c: Likewise. * video/efi_uga.c: Likewise. * video/fb/video_fb.c: Likewise. * video/i386/pc/vbe.c: Likewise. * video/readers/tga.c: Likewise. * video/video.c: Likewise.
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return grub_error (GRUB_ERR_BAD_OS, "no program headers present");
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if (*segments_end < *segments_start)
/* Very bad addresses. */
2009-12-24 Carles Pina i Estany <carles@pina.cat> * bus/usb/usbhub.c: Fix capitalization, fullstop and newlines in grub_errno calls. * commands/acpi.c: Likewise. * commands/blocklist.c: Likewise. * commands/efi/loadbios.c: Likewise. * commands/i386/pc/drivemap.c: Likewise. * commands/loadenv.c: Likewise. * commands/memrw.c: Likewise. * commands/password.c: Likewise. * commands/videotest.c: Likewise. * disk/ata.c: Likewise. * disk/ata_pthru.c: Likewise. * disk/dmraid_nvidia.c: Likewise. * disk/ieee1275/nand.c: Likewise. * disk/ieee1275/ofdisk.c: Likewise. * disk/loopback.c: Likewise. * disk/lvm.c: Likewise. * disk/mdraid_linux.c: Likewise. * disk/raid.c: Likewise. * disk/raid6_recover.c: Likewise. * disk/scsi.c: Likewise. * efiemu/main.c: Likewise. * efiemu/mm.c: Likewise. * efiemu/pnvram.c: Likewise. * efiemu/symbols.c: Likewise. * font/font.c: Likewise. * fs/cpio.c: Likewise. * fs/hfsplus.c: Likewise. * fs/iso9660.c: Likewise. * fs/jfs.c: Likewise. * fs/minix.c: Likewise. * fs/ntfs.c: Likewise. * fs/ntfscomp.c: Likewise. * fs/reiserfs.c: Likewise. * fs/ufs.c: Likewise. * fs/xfs.c: Likewise. * gettext/gettext.c: Likewise. * include/grub/auth.h: Likewise. * kern/elf.c: Likewise. * kern/file.c: Likewise. * kern/ieee1275/init.c: Likewise. * kern/ieee1275/mmap.c: Likewise. * kern/ieee1275/openfw.c: Likewise. * kern/powerpc/dl.c: Likewise. * kern/sparc64/dl.c: Likewise. * lib/arg.c: Likewise. * loader/i386/bsd.c: Likewise. * loader/i386/bsdXX.c: Likewise. * loader/i386/efi/linux.c: Likewise. * loader/i386/efi/xnu.c: Likewise. * loader/i386/ieee1275/linux.c: Likewise. * loader/i386/linux.c: Likewise. * loader/i386/multiboot.c: Likewise. * loader/i386/pc/linux.c: Likewise. * loader/i386/pc/multiboot2.c: Likewise. * loader/i386/xnu.c: Likewise. * loader/ieee1275/multiboot2.c: Likewise. * loader/macho.c: Likewise. * loader/machoXX.c: Likewise. * loader/multiboot2.c: Likewise. * loader/multiboot_loader.c: Likewise. * loader/powerpc/ieee1275/linux.c: Likewise. * loader/sparc64/ieee1275/linux.c: Likewise. * loader/xnu.c: Likewise. * loader/xnu_resume.c: Likewise. * mmap/i386/pc/mmap.c: Likewise. * normal/menu_viewer.c: Likewise. * partmap/acorn.c: Likewise. * partmap/amiga.c: Likewise. * partmap/apple.c: Likewise. * script/lexer.c: Likewise. * term/gfxterm.c: Likewise. * term/i386/pc/serial.c: Likewise. * term/i386/pc/vga.c: Likewise. * term/ieee1275/ofconsole.c: Likewise. * term/terminfo.c: Likewise. * video/bitmap.c: Likewise. * video/efi_gop.c: Likewise. * video/efi_uga.c: Likewise. * video/fb/video_fb.c: Likewise. * video/i386/pc/vbe.c: Likewise. * video/readers/tga.c: Likewise. * video/video.c: Likewise.
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return grub_error (GRUB_ERR_BAD_OS, "bad program header load addresses");
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return GRUB_ERR_NONE;
}
struct do_load_ctx
{
int flags;
char *offset;
const char *filename;
int *darwin_version;
};
static int
do_load(grub_macho_t _macho,
struct grub_macho_cmd *hdr0,
void *_arg)
{
grub_macho_segment_t *hdr = (grub_macho_segment_t *) hdr0;
struct do_load_ctx *ctx = _arg;
if (hdr->cmd != GRUB_MACHO_CMD_SEGMENT)
return 0;
if (! hdr->filesize && (ctx->flags & GRUB_MACHO_NOBSS))
return 0;
if (! hdr->vmsize)
return 0;
if (hdr->filesize)
{
grub_ssize_t read, toread = min (hdr->filesize, hdr->vmsize);
if (_macho->uncompressedXX)
{
if (hdr->fileoff + (grub_size_t) toread
> _macho->uncompressed_sizeXX)
read = -1;
else
{
read = toread;
grub_memcpy (ctx->offset + hdr->vmaddr,
_macho->uncompressedXX + hdr->fileoff, read);
}
}
else
{
if (grub_file_seek (_macho->file, hdr->fileoff
+ _macho->offsetXX) == (grub_off_t) -1)
return 1;
read = grub_file_read (_macho->file, ctx->offset + hdr->vmaddr,
toread);
}
if (read != toread)
{
/* XXX How can we free memory from `load_hook'? */
if (!grub_errno)
grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"),
ctx->filename);
return 1;
}
if (ctx->darwin_version)
{
const char *ptr = ctx->offset + hdr->vmaddr;
const char *end = ptr + min (hdr->filesize, hdr->vmsize)
- (sizeof ("Darwin Kernel Version ") - 1);
for (; ptr < end; ptr++)
if (grub_memcmp (ptr, "Darwin Kernel Version ",
sizeof ("Darwin Kernel Version ") - 1) == 0)
{
ptr += sizeof ("Darwin Kernel Version ") - 1;
*ctx->darwin_version = 0;
end += (sizeof ("Darwin Kernel Version ") - 1);
while (ptr < end && grub_isdigit (*ptr))
*ctx->darwin_version = (*ptr++ - '0') + *ctx->darwin_version * 10;
break;
}
}
}
if (hdr->filesize < hdr->vmsize)
grub_memset (ctx->offset + hdr->vmaddr + hdr->filesize,
0, hdr->vmsize - hdr->filesize);
return 0;
}
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/* Load every loadable segment into memory specified by `_load_hook'. */
grub_err_t
SUFFIX (grub_macho_load) (grub_macho_t macho, const char *filename,
char *offset, int flags, int *darwin_version)
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{
struct do_load_ctx ctx = {
.flags = flags,
.offset = offset,
.filename = filename,
.darwin_version = darwin_version
};
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if (darwin_version)
*darwin_version = 0;
grub_macho_cmds_iterate (macho, do_load, &ctx, filename);
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return grub_errno;
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}
static int
find_entry_point (grub_macho_t _macho __attribute__ ((unused)),
struct grub_macho_cmd *hdr,
void *_arg)
{
grub_macho_addr_t *entry_point = _arg;
if (hdr->cmd == GRUB_MACHO_CMD_THREAD)
*entry_point = ((grub_macho_thread_t *) hdr)->entry_point;
return 0;
}
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grub_macho_addr_t
SUFFIX (grub_macho_get_entry_point) (grub_macho_t macho, const char *filename)
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{
grub_macho_addr_t entry_point = 0;
grub_macho_cmds_iterate (macho, find_entry_point, &entry_point, filename);
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return entry_point;
}