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grub/loader/xnu.c
phcoder 965632c10f snow32 support.
2009-08-30 14:26:41 +02:00

1407 lines
37 KiB
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/* xnu.c - load xnu kernel. Thanks to Florian Idelberger for all the
time he spent testing this
*/
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2009 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/file.h>
#include <grub/xnu.h>
#include <grub/cpu/xnu.h>
#include <grub/mm.h>
#include <grub/dl.h>
#include <grub/loader.h>
#include <grub/machoload.h>
#include <grub/macho.h>
#include <grub/cpu/macho.h>
#include <grub/gzio.h>
#include <grub/command.h>
#include <grub/misc.h>
struct grub_xnu_devtree_key *grub_xnu_devtree_root = 0;
static int driverspackagenum = 0;
static int driversnum = 0;
/* Allocate heap by 32MB-blocks. */
#define GRUB_XNU_HEAP_ALLOC_BLOCK 0x2000000
static grub_err_t
grub_xnu_register_memory (char *prefix, int *suffix,
void *addr, grub_size_t size);
void *
grub_xnu_heap_malloc (int size)
{
void *val;
#if 0
/* This way booting is faster but less reliable.
Once we have advanced mm second way will be as fast as this one. */
val = grub_xnu_heap_start = (char *) 0x100000;
#else
int oldblknum, newblknum;
/* The page after the heap is used for stack. Ensure it's usable. */
if (grub_xnu_heap_size)
oldblknum = (grub_xnu_heap_size + GRUB_XNU_PAGESIZE
+ GRUB_XNU_HEAP_ALLOC_BLOCK - 1) / GRUB_XNU_HEAP_ALLOC_BLOCK;
else
oldblknum = 0;
newblknum = (grub_xnu_heap_size + size + GRUB_XNU_PAGESIZE
+ GRUB_XNU_HEAP_ALLOC_BLOCK - 1) / GRUB_XNU_HEAP_ALLOC_BLOCK;
if (oldblknum != newblknum)
/* FIXME: instruct realloc to allocate at 1MB if possible once
advanced mm is ready. */
val = grub_realloc (grub_xnu_heap_start,
newblknum * GRUB_XNU_HEAP_ALLOC_BLOCK);
else
val = grub_xnu_heap_start;
if (! val)
{
grub_error (GRUB_ERR_OUT_OF_MEMORY,
"not enough space on xnu memory heap");
return 0;
}
grub_xnu_heap_start = val;
#endif
val = (char *) grub_xnu_heap_start + grub_xnu_heap_size;
grub_xnu_heap_size += size;
grub_dprintf ("xnu", "val=%p\n", val);
return (char *) val;
}
/* Make sure next block of the heap will be aligned.
Please notice: aligned are pointers AFTER relocation
and not the current ones. */
grub_err_t
grub_xnu_align_heap (int align)
{
int align_overhead = align - grub_xnu_heap_size % align;
if (align_overhead == align)
return GRUB_ERR_NONE;
if (! grub_xnu_heap_malloc (align_overhead))
return grub_errno;
return GRUB_ERR_NONE;
}
/* Free subtree pointed by CUR. */
void
grub_xnu_free_devtree (struct grub_xnu_devtree_key *cur)
{
struct grub_xnu_devtree_key *d;
while (cur)
{
grub_free (cur->name);
if (cur->datasize == -1)
grub_xnu_free_devtree (cur->first_child);
else if (cur->data)
grub_free (cur->data);
d = cur->next;
grub_free (cur);
cur = d;
}
}
/* Compute the size of device tree in xnu format. */
static grub_size_t
grub_xnu_writetree_get_size (struct grub_xnu_devtree_key *start, char *name)
{
grub_size_t ret;
struct grub_xnu_devtree_key *cur;
/* Key header. */
ret = 2 * sizeof (grub_uint32_t);
/* "name" value. */
ret += 32 + sizeof (grub_uint32_t)
+ grub_strlen (name) + 4
- (grub_strlen (name) % 4);
for (cur = start; cur; cur = cur->next)
if (cur->datasize != -1)
{
int align_overhead;
align_overhead = 4 - (cur->datasize % 4);
if (align_overhead == 4)
align_overhead = 0;
ret += 32 + sizeof (grub_uint32_t) + cur->datasize + align_overhead;
}
else
ret += grub_xnu_writetree_get_size (cur->first_child, cur->name);
return ret;
}
/* Write devtree in XNU format at curptr assuming the head is named NAME.*/
static void *
grub_xnu_writetree_toheap_real (void *curptr,
struct grub_xnu_devtree_key *start, char *name)
{
struct grub_xnu_devtree_key *cur;
int nkeys = 0, nvals = 0;
for (cur = start; cur; cur = cur->next)
{
if (cur->datasize == -1)
nkeys++;
else
nvals++;
}
/* For the name. */
nvals++;
*((grub_uint32_t *) curptr) = nvals;
curptr = ((grub_uint32_t *) curptr) + 1;
*((grub_uint32_t *) curptr) = nkeys;
curptr = ((grub_uint32_t *) curptr) + 1;
/* First comes "name" value. */
grub_memset (curptr, 0, 32);
grub_memcpy (curptr, "name", 4);
curptr = ((grub_uint8_t *) curptr) + 32;
*((grub_uint32_t *)curptr) = grub_strlen (name) + 1;
curptr = ((grub_uint32_t *) curptr) + 1;
grub_memcpy (curptr, name, grub_strlen (name));
curptr = ((grub_uint8_t *) curptr) + grub_strlen (name);
grub_memset (curptr, 0, 4 - (grub_strlen (name) % 4));
curptr = ((grub_uint8_t *) curptr) + (4 - (grub_strlen (name) % 4));
/* Then the other values. */
for (cur = start; cur; cur = cur->next)
if (cur->datasize != -1)
{
int align_overhead;
align_overhead = 4 - (cur->datasize % 4);
if (align_overhead == 4)
align_overhead = 0;
grub_memset (curptr, 0, 32);
grub_strncpy (curptr, cur->name, 31);
curptr = ((grub_uint8_t *) curptr) + 32;
*((grub_uint32_t *) curptr) = cur->datasize;
curptr = ((grub_uint32_t *) curptr) + 1;
grub_memcpy (curptr, cur->data, cur->datasize);
curptr = ((grub_uint8_t *) curptr) + cur->datasize;
grub_memset (curptr, 0, align_overhead);
curptr = ((grub_uint8_t *) curptr) + align_overhead;
}
/* And then the keys. Recursively use this function. */
for (cur = start; cur; cur = cur->next)
if (cur->datasize == -1)
if (!(curptr = grub_xnu_writetree_toheap_real (curptr,
cur->first_child,
cur->name)))
return 0;
return curptr;
}
grub_err_t
grub_xnu_writetree_toheap (void **start, grub_size_t *size)
{
struct grub_xnu_devtree_key *chosen;
struct grub_xnu_devtree_key *memorymap;
struct grub_xnu_devtree_key *driverkey;
struct grub_xnu_extdesc *extdesc;
grub_err_t err;
err = grub_xnu_align_heap (GRUB_XNU_PAGESIZE);
if (err)
return err;
/* Device tree itself is in the memory map of device tree. */
/* Create a dummy value in memory-map. */
chosen = grub_xnu_create_key (&grub_xnu_devtree_root, "chosen");
if (! chosen)
return grub_errno;
memorymap = grub_xnu_create_key (&(chosen->first_child), "memory-map");
if (! memorymap)
return grub_errno;
driverkey = (struct grub_xnu_devtree_key *) grub_malloc (sizeof (*driverkey));
if (! driverkey)
return grub_error (GRUB_ERR_OUT_OF_MEMORY, "can't write device tree");
driverkey->name = grub_strdup ("DeviceTree");
if (! driverkey->name)
return grub_error (GRUB_ERR_OUT_OF_MEMORY, "can't write device tree");
driverkey->datasize = sizeof (*extdesc);
driverkey->next = memorymap->first_child;
memorymap->first_child = driverkey;
driverkey->data = extdesc
= (struct grub_xnu_extdesc *) grub_malloc (sizeof (*extdesc));
if (! driverkey->data)
return grub_error (GRUB_ERR_OUT_OF_MEMORY, "can't write device tree");
/* Allocate the space based on the size with dummy value. */
*size = grub_xnu_writetree_get_size (grub_xnu_devtree_root, "/");
*start = grub_xnu_heap_malloc (*size + GRUB_XNU_PAGESIZE
- *size % GRUB_XNU_PAGESIZE);
/* Put real data in the dummy. */
extdesc->addr = (char *) *start - grub_xnu_heap_start
+ grub_xnu_heap_will_be_at;
extdesc->size = (grub_uint32_t) *size;
/* Write the tree to heap. */
grub_xnu_writetree_toheap_real (*start, grub_xnu_devtree_root, "/");
return GRUB_ERR_NONE;
}
/* Find a key or value in parent key. */
struct grub_xnu_devtree_key *
grub_xnu_find_key (struct grub_xnu_devtree_key *parent, char *name)
{
struct grub_xnu_devtree_key *cur;
for (cur = parent; cur; cur = cur->next)
if (grub_strcmp (cur->name, name) == 0)
return cur;
return 0;
}
struct grub_xnu_devtree_key *
grub_xnu_create_key (struct grub_xnu_devtree_key **parent, char *name)
{
struct grub_xnu_devtree_key *ret;
ret = grub_xnu_find_key (*parent, name);
if (ret)
return ret;
ret = (struct grub_xnu_devtree_key *) grub_zalloc (sizeof (*ret));
if (! ret)
{
grub_error (GRUB_ERR_OUT_OF_MEMORY, "can't create key %s", name);
return 0;
}
ret->name = grub_strdup (name);
if (! ret->name)
{
grub_free (ret);
grub_error (GRUB_ERR_OUT_OF_MEMORY, "can't create key %s", name);
return 0;
}
ret->datasize = -1;
ret->next = *parent;
*parent = ret;
return ret;
}
struct grub_xnu_devtree_key *
grub_xnu_create_value (struct grub_xnu_devtree_key **parent, char *name)
{
struct grub_xnu_devtree_key *ret;
ret = grub_xnu_find_key (*parent, name);
if (ret)
{
if (ret->datasize == -1)
grub_xnu_free_devtree (ret->first_child);
else if (ret->datasize)
grub_free (ret->data);
ret->datasize = 0;
ret->data = 0;
return ret;
}
ret = (struct grub_xnu_devtree_key *) grub_zalloc (sizeof (*ret));
if (! ret)
{
grub_error (GRUB_ERR_OUT_OF_MEMORY, "can't create value %s", name);
return 0;
}
ret->name = grub_strdup (name);
if (! ret->name)
{
grub_free (ret);
grub_error (GRUB_ERR_OUT_OF_MEMORY, "can't create value %s", name);
return 0;
}
ret->next = *parent;
*parent = ret;
return ret;
}
static grub_err_t
grub_xnu_unload (void)
{
grub_xnu_free_devtree (grub_xnu_devtree_root);
grub_xnu_devtree_root = 0;
/* Free loaded image. */
driversnum = 0;
driverspackagenum = 0;
grub_free (grub_xnu_heap_start);
grub_xnu_heap_start = 0;
grub_xnu_heap_size = 0;
grub_xnu_unlock ();
return GRUB_ERR_NONE;
}
static grub_err_t
grub_cmd_xnu_kernel (grub_command_t cmd __attribute__ ((unused)),
int argc, char *args[])
{
grub_err_t err;
grub_macho_t macho;
grub_addr_t startcode, endcode;
int i;
char *ptr, *loadaddr;
if (argc < 1)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "file name required");
grub_xnu_unload ();
macho = grub_macho_open (args[0]);
if (! macho)
return grub_errno;
if (! grub_macho_contains_macho32 (macho))
{
grub_macho_close (macho);
return grub_error (GRUB_ERR_BAD_OS,
"Kernel doesn't contain suitable architecture");
}
err = grub_macho32_size (macho, &startcode, &endcode, GRUB_MACHO_NOBSS);
if (err)
{
grub_macho_close (macho);
grub_xnu_unload ();
return err;
}
grub_dprintf ("xnu", "endcode = %lx, startcode = %lx\n",
(unsigned long) endcode, (unsigned long) startcode);
loadaddr = grub_xnu_heap_malloc (endcode - startcode);
grub_xnu_heap_will_be_at = startcode;
if (! loadaddr)
{
grub_macho_close (macho);
grub_xnu_unload ();
return grub_error (GRUB_ERR_OUT_OF_MEMORY,
"not enough memory to load kernel");
}
/* Load kernel. */
err = grub_macho32_load (macho, loadaddr - startcode, GRUB_MACHO_NOBSS);
if (err)
{
grub_macho_close (macho);
grub_xnu_unload ();
return err;
}
grub_xnu_entry_point = grub_macho32_get_entry_point (macho);
if (! grub_xnu_entry_point)
{
grub_macho_close (macho);
grub_xnu_unload ();
return grub_error (GRUB_ERR_BAD_OS, "couldn't find entry point");
}
grub_macho_close (macho);
err = grub_xnu_align_heap (GRUB_XNU_PAGESIZE);
if (err)
{
grub_xnu_unload ();
return err;
}
/* Copy parameters to kernel command line. */
ptr = grub_xnu_cmdline;
for (i = 1; i < argc; i++)
{
if (ptr + grub_strlen (args[i]) + 1
>= grub_xnu_cmdline + sizeof (grub_xnu_cmdline))
break;
grub_memcpy (ptr, args[i], grub_strlen (args[i]));
ptr += grub_strlen (args[i]);
*ptr = ' ';
ptr++;
}
/* Replace last space by '\0'. */
if (ptr != grub_xnu_cmdline)
*(ptr - 1) = 0;
err = grub_cpu_xnu_fill_devicetree ();
if (err)
return err;
grub_loader_set (grub_xnu_boot, grub_xnu_unload, 0);
grub_xnu_lock ();
return 0;
}
/* Register a memory in a memory map under name PREFIXSUFFIX
and increment SUFFIX. */
static grub_err_t
grub_xnu_register_memory (char *prefix, int *suffix,
void *addr, grub_size_t size)
{
struct grub_xnu_devtree_key *chosen;
struct grub_xnu_devtree_key *memorymap;
struct grub_xnu_devtree_key *driverkey;
struct grub_xnu_extdesc *extdesc;
if (! grub_xnu_heap_size)
return grub_error (GRUB_ERR_BAD_OS, "no xnu kernel loaded");
chosen = grub_xnu_create_key (&grub_xnu_devtree_root, "chosen");
if (! chosen)
return grub_errno;
memorymap = grub_xnu_create_key (&(chosen->first_child), "memory-map");
if (! memorymap)
return grub_errno;
driverkey = (struct grub_xnu_devtree_key *) grub_malloc (sizeof (*driverkey));
if (! driverkey)
return grub_error (GRUB_ERR_OUT_OF_MEMORY, "can't register memory");
if (suffix)
{
driverkey->name = grub_malloc (grub_strlen (prefix) + 10);
if (!driverkey->name)
return grub_error (GRUB_ERR_OUT_OF_MEMORY, "can't register memory");
grub_sprintf (driverkey->name, "%s%d", prefix, (*suffix)++);
}
else
driverkey->name = grub_strdup (prefix);
if (! driverkey->name)
return grub_error (GRUB_ERR_OUT_OF_MEMORY, "can't register extension");
driverkey->datasize = sizeof (*extdesc);
driverkey->next = memorymap->first_child;
memorymap->first_child = driverkey;
driverkey->data = extdesc
= (struct grub_xnu_extdesc *) grub_malloc (sizeof (*extdesc));
if (! driverkey->data)
return grub_error (GRUB_ERR_OUT_OF_MEMORY, "can't register extension");
extdesc->addr = grub_xnu_heap_will_be_at +
((grub_uint8_t *) addr - (grub_uint8_t *) grub_xnu_heap_start);
extdesc->size = (grub_uint32_t) size;
return GRUB_ERR_NONE;
}
static inline char *
get_name_ptr (char *name)
{
char *p = name, *p2;
/* Skip Info.plist. */
p2 = grub_strrchr (p, '/');
if (!p2)
return name;
if (p2 == name)
return name + 1;
p = p2 - 1;
p2 = grub_strrchr (p, '/');
if (!p2)
return name;
if (p2 == name)
return name + 1;
if (grub_memcmp (p2, "/Contents/", sizeof ("/Contents/") - 1) != 0)
return p2 + 1;
p = p2 - 1;
p2 = grub_strrchr (p, '/');
if (!p2)
return name;
return p2 + 1;
}
/* Load .kext. */
static grub_err_t
grub_xnu_load_driver (char *infoplistname, grub_file_t binaryfile)
{
grub_macho_t macho;
grub_err_t err;
grub_file_t infoplist;
struct grub_xnu_extheader *exthead;
int neededspace = sizeof (*exthead);
char *buf;
grub_size_t infoplistsize = 0, machosize = 0;
char *name, *nameend;
int namelen;
name = get_name_ptr (infoplistname);
nameend = grub_strchr (name, '/');
if (nameend)
namelen = nameend - name;
else
namelen = grub_strlen (name);
neededspace += namelen + 1;
if (! grub_xnu_heap_size)
return grub_error (GRUB_ERR_BAD_OS, "no xnu kernel loaded");
/* Compute the needed space. */
if (binaryfile)
{
macho = grub_macho_file (binaryfile);
if (! macho || ! grub_macho_contains_macho32 (macho))
{
if (macho)
grub_macho_close (macho);
return grub_error (GRUB_ERR_BAD_OS,
"Extension doesn't contain suitable architecture");
}
machosize = grub_macho32_filesize (macho);
neededspace += machosize;
}
else
macho = 0;
if (infoplistname)
infoplist = grub_gzfile_open (infoplistname, 1);
else
infoplist = 0;
grub_errno = GRUB_ERR_NONE;
if (infoplist)
{
infoplistsize = grub_file_size (infoplist);
neededspace += infoplistsize + 1;
}
else
infoplistsize = 0;
/* Allocate the space. */
err = grub_xnu_align_heap (GRUB_XNU_PAGESIZE);
if (err)
return err;
buf = grub_xnu_heap_malloc (neededspace);
exthead = (struct grub_xnu_extheader *) buf;
grub_memset (exthead, 0, sizeof (*exthead));
buf += sizeof (*exthead);
/* Load the binary. */
if (macho)
{
exthead->binaryaddr = (buf - grub_xnu_heap_start)
+ grub_xnu_heap_will_be_at;
exthead->binarysize = machosize;
if ((err = grub_macho32_readfile (macho, buf)))
{
grub_macho_close (macho);
return err;
}
grub_macho_close (macho);
buf += machosize;
}
grub_errno = GRUB_ERR_NONE;
/* Load the plist. */
if (infoplist)
{
exthead->infoplistaddr = (buf - grub_xnu_heap_start)
+ grub_xnu_heap_will_be_at;
exthead->infoplistsize = infoplistsize + 1;
if (grub_file_read (infoplist, buf, infoplistsize)
!= (grub_ssize_t) (infoplistsize))
{
grub_file_close (infoplist);
grub_error_push ();
return grub_error (GRUB_ERR_BAD_OS, "Couldn't read file %s: ",
infoplistname);
}
grub_file_close (infoplist);
buf[infoplistsize] = 0;
buf += infoplistsize + 1;
}
grub_errno = GRUB_ERR_NONE;
exthead->nameaddr = (buf - grub_xnu_heap_start) + grub_xnu_heap_will_be_at;
exthead->namesize = namelen + 1;
grub_memcpy (buf, name, namelen);
buf[namelen] = 0;
buf += namelen + 1;
/* Announce to kernel */
return grub_xnu_register_memory ("Driver-", &driversnum, exthead,
neededspace);
}
/* Load mkext. */
static grub_err_t
grub_cmd_xnu_mkext (grub_command_t cmd __attribute__ ((unused)),
int argc, char *args[])
{
grub_file_t file;
void *loadto;
grub_err_t err;
grub_off_t readoff = 0;
grub_ssize_t readlen = -1;
struct grub_macho_fat_header head;
struct grub_macho_fat_arch *archs;
int narchs, i;
if (argc != 1)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "file name required");
if (! grub_xnu_heap_size)
return grub_error (GRUB_ERR_BAD_OS, "no xnu kernel loaded");
file = grub_gzfile_open (args[0], 1);
if (! file)
return grub_error (GRUB_ERR_FILE_NOT_FOUND,
"Couldn't load driver package");
/* Sometimes caches are fat binary. Errgh. */
if (grub_file_read (file, &head, sizeof (head))
!= (grub_ssize_t) (sizeof (head)))
{
/* I don't know the internal structure of package but
can hardly imagine a valid package shorter than 20 bytes. */
grub_file_close (file);
grub_error_push ();
return grub_error (GRUB_ERR_BAD_OS, "Couldn't read file %s", args[0]);
}
/* Find the corresponding architecture. */
if (grub_be_to_cpu32 (head.magic) == GRUB_MACHO_FAT_MAGIC)
{
narchs = grub_be_to_cpu32 (head.nfat_arch);
archs = grub_malloc (sizeof (struct grub_macho_fat_arch) * narchs);
if (! archs)
{
grub_file_close (file);
grub_error_push ();
return grub_error (GRUB_ERR_OUT_OF_MEMORY,
"Couldn't read file %s", args[0]);
}
if (grub_file_read (file, archs,
sizeof (struct grub_macho_fat_arch) * narchs)
!= (grub_ssize_t) sizeof(struct grub_macho_fat_arch) * narchs)
{
grub_free (archs);
grub_error_push ();
return grub_error (GRUB_ERR_READ_ERROR, "Cannot read fat header.");
}
for (i = 0; i < narchs; i++)
{
if (GRUB_MACHO_CPUTYPE_IS_HOST32
(grub_be_to_cpu32 (archs[i].cputype)))
{
readoff = grub_be_to_cpu32 (archs[i].offset);
readlen = grub_be_to_cpu32 (archs[i].size);
}
}
grub_free (archs);
}
else
{
/* It's a flat file. Some sane people still exist. */
readoff = 0;
readlen = grub_file_size (file);
}
if (readlen == -1)
{
grub_file_close (file);
return grub_error (GRUB_ERR_BAD_OS, "no suitable architecture is found");
}
/* Allocate space. */
err = grub_xnu_align_heap (GRUB_XNU_PAGESIZE);
if (err)
{
grub_file_close (file);
return err;
}
loadto = grub_xnu_heap_malloc (readlen);
if (! loadto)
{
grub_file_close (file);
return grub_errno;
}
/* Read the file. */
grub_file_seek (file, readoff);
if (grub_file_read (file, loadto, readlen) != (grub_ssize_t) (readlen))
{
grub_file_close (file);
grub_error_push ();
return grub_error (GRUB_ERR_BAD_OS, "Couldn't read file %s", args[0]);
}
grub_file_close (file);
/* Pass it to kernel. */
return grub_xnu_register_memory ("DriversPackage-", &driverspackagenum,
loadto, readlen);
}
static grub_err_t
grub_cmd_xnu_ramdisk (grub_command_t cmd __attribute__ ((unused)),
int argc, char *args[])
{
grub_file_t file;
void *loadto;
grub_err_t err;
grub_size_t size;
if (argc != 1)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "file name required");
if (! grub_xnu_heap_size)
return grub_error (GRUB_ERR_BAD_OS, "no xnu kernel loaded");
file = grub_gzfile_open (args[0], 1);
if (! file)
return grub_error (GRUB_ERR_FILE_NOT_FOUND,
"Couldn't load ramdisk");
err = grub_xnu_align_heap (GRUB_XNU_PAGESIZE);
if (err)
return err;
size = grub_file_size (file);
loadto = grub_xnu_heap_malloc (size);
if (! loadto)
return grub_errno;
if (grub_file_read (file, loadto, size)
!= (grub_ssize_t) (size))
{
grub_file_close (file);
grub_error_push ();
return grub_error (GRUB_ERR_BAD_OS, "Couldn't read file %s", args[0]);
}
return grub_xnu_register_memory ("RAMDisk", 0, loadto, size);
}
/* Parse a devtree file. It uses the following format:
valuename:valuedata;
keyname{
contents
}
keyname, valuename and valuedata are in hex.
*/
static char *
grub_xnu_parse_devtree (struct grub_xnu_devtree_key **parent,
char *start, char *end)
{
char *ptr, *ptr2;
char *name, *data;
int namelen, datalen, i;
for (ptr = start; ptr && ptr < end; )
{
if (grub_isspace (*ptr))
{
ptr++;
continue;
}
if (*ptr == '}')
return ptr + 1;
namelen = 0;
/* Parse the name. */
for (ptr2 = ptr; ptr2 < end && (grub_isspace (*ptr2)
|| (*ptr2 >= '0' && *ptr2 <= '9')
|| (*ptr2 >= 'a' && *ptr2 <= 'f')
|| (*ptr2 >= 'A' && *ptr2 <= 'F'));
ptr2++)
if (! grub_isspace (*ptr2))
namelen++;
if (ptr2 == end)
return 0;
namelen /= 2;
name = grub_malloc (namelen + 1);
if (!name)
return 0;
for (i = 0; i < 2 * namelen; i++)
{
int hex = 0;
while (grub_isspace (*ptr))
ptr++;
if (*ptr >= '0' && *ptr <= '9')
hex = *ptr - '0';
if (*ptr >= 'a' && *ptr <= 'f')
hex = *ptr - 'a' + 10;
if (*ptr >= 'A' && *ptr <= 'F')
hex = *ptr - 'A' + 10;
if (i % 2 == 0)
name[i / 2] = hex << 4;
else
name[i / 2] |= hex;
ptr++;
}
name [namelen] = 0;
while (grub_isspace (*ptr))
ptr++;
/* If it describes a key recursively invoke the function. */
if (*ptr == '{')
{
struct grub_xnu_devtree_key *newkey
= grub_xnu_create_key (parent, name);
grub_free (name);
if (! newkey)
return 0;
ptr = grub_xnu_parse_devtree (&(newkey->first_child), ptr + 1, end);
continue;
}
/* Parse the data. */
if (*ptr != ':')
return 0;
ptr++;
datalen = 0;
for (ptr2 = ptr; ptr2 < end && (grub_isspace (*ptr2)
|| (*ptr2 >= '0' && *ptr2 <= '9')
|| (*ptr2 >= 'a' && *ptr2 <= 'f')
|| (*ptr2 >= 'A' && *ptr2 <= 'F'));
ptr2++)
if (! grub_isspace (*ptr2))
datalen++;
if (ptr2 == end)
return 0;
datalen /= 2;
data = grub_malloc (datalen);
if (! data)
return 0;
for (i = 0; i < 2 * datalen; i++)
{
int hex = 0;
while (grub_isspace (*ptr))
ptr++;
if (*ptr >= '0' && *ptr <= '9')
hex = *ptr - '0';
if (*ptr >= 'a' && *ptr <= 'f')
hex = *ptr - 'a' + 10;
if (*ptr >= 'A' && *ptr <= 'F')
hex = *ptr - 'A' + 10;
if (i % 2 == 0)
data[i / 2] = hex << 4;
else
data[i / 2] |= hex;
ptr++;
}
while (ptr < end && grub_isspace (*ptr))
ptr++;
{
struct grub_xnu_devtree_key *newkey
= grub_xnu_create_value (parent, name);
grub_free (name);
if (! newkey)
return 0;
newkey->datasize = datalen;
newkey->data = data;
}
if (*ptr != ';')
return 0;
ptr++;
}
if (ptr >= end && *parent != grub_xnu_devtree_root)
return 0;
return ptr;
}
/* Returns true if the kext should be loaded according to plist
and osbundlereq. Also fill BINNAME. */
static int
grub_xnu_check_os_bundle_required (char *plistname, char *osbundlereq,
char **binname)
{
grub_file_t file;
char *buf = 0, *tagstart = 0, *ptr1 = 0, *keyptr = 0;
char *stringptr = 0, *ptr2 = 0;
grub_size_t size;
int depth = 0;
int ret;
int osbundlekeyfound = 0, binnamekeyfound = 0;
if (binname)
*binname = 0;
file = grub_gzfile_open (plistname, 1);
if (! file)
{
grub_file_close (file);
grub_error_push ();
grub_error (GRUB_ERR_BAD_OS, "Couldn't read file %s", plistname);
return 0;
}
size = grub_file_size (file);
buf = grub_malloc (size);
if (! buf)
{
grub_file_close (file);
grub_error_push ();
grub_error (GRUB_ERR_OUT_OF_MEMORY, "Couldn't read file %s", plistname);
return 0;
}
if (grub_file_read (file, buf, size) != (grub_ssize_t) (size))
{
grub_file_close (file);
grub_error_push ();
grub_error (GRUB_ERR_BAD_OS, "Couldn't read file %s", plistname);
return 0;
}
grub_file_close (file);
/* Set the return value for the case when no OSBundleRequired tag is found. */
if (osbundlereq)
ret = grub_strword (osbundlereq, "all") || grub_strword (osbundlereq, "-");
else
ret = 1;
/* Parse plist. It's quite dirty and inextensible but does its job. */
for (ptr1 = buf; ptr1 < buf + size; ptr1++)
switch (*ptr1)
{
case '<':
tagstart = ptr1;
*ptr1 = 0;
if (keyptr && depth == 4
&& grub_strcmp (keyptr, "OSBundleRequired") == 0)
osbundlekeyfound = 1;
if (keyptr && depth == 4 &&
grub_strcmp (keyptr, "CFBundleExecutable") == 0)
binnamekeyfound = 1;
if (stringptr && osbundlekeyfound && osbundlereq && depth == 4)
{
for (ptr2 = stringptr; *ptr2; ptr2++)
*ptr2 = grub_tolower (*ptr2);
ret = grub_strword (osbundlereq, stringptr)
|| grub_strword (osbundlereq, "all");
}
if (stringptr && binnamekeyfound && binname && depth == 4)
{
if (*binname)
grub_free (*binname);
*binname = grub_strdup (stringptr);
}
*ptr1 = '<';
keyptr = 0;
stringptr = 0;
break;
case '>':
if (! tagstart)
{
grub_free (buf);
grub_error (GRUB_ERR_BAD_OS, "can't parse %s", plistname);
return 0;
}
*ptr1 = 0;
if (tagstart[1] == '?' || ptr1[-1] == '/')
{
osbundlekeyfound = 0;
*ptr1 = '>';
break;
}
if (depth == 3 && grub_strcmp (tagstart + 1, "key") == 0)
keyptr = ptr1 + 1;
if (depth == 3 && grub_strcmp (tagstart + 1, "string") == 0)
stringptr = ptr1 + 1;
else if (grub_strcmp (tagstart + 1, "/key") != 0)
{
osbundlekeyfound = 0;
binnamekeyfound = 0;
}
*ptr1 = '>';
if (tagstart[1] == '/')
depth--;
else
depth++;
break;
}
grub_free (buf);
return ret;
}
/* Load all loadable kexts placed under DIRNAME and matching OSBUNDLEREQUIRED */
grub_err_t
grub_xnu_scan_dir_for_kexts (char *dirname, char *osbundlerequired,
int maxrecursion)
{
grub_device_t dev;
char *device_name;
grub_fs_t fs;
const char *path;
auto int load_hook (const char *filename,
const struct grub_dirhook_info *info);
int load_hook (const char *filename, const struct grub_dirhook_info *info)
{
char *newdirname;
if (! info->dir)
return 0;
if (filename[0] == '.')
return 0;
if (grub_strlen (filename) < 5 ||
grub_memcmp (filename + grub_strlen (filename) - 5, ".kext", 5) != 0)
return 0;
newdirname
= grub_malloc (grub_strlen (dirname) + grub_strlen (filename) + 2);
/* It's a .kext. Try to load it. */
if (newdirname)
{
grub_strcpy (newdirname, dirname);
newdirname[grub_strlen (newdirname) + 1] = 0;
newdirname[grub_strlen (newdirname)] = '/';
grub_strcpy (newdirname + grub_strlen (newdirname), filename);
grub_xnu_load_kext_from_dir (newdirname, osbundlerequired,
maxrecursion);
if (grub_errno == GRUB_ERR_BAD_OS)
grub_errno = GRUB_ERR_NONE;
grub_free (newdirname);
}
return 0;
}
if (! grub_xnu_heap_size)
return grub_error (GRUB_ERR_BAD_OS, "no xnu kernel loaded");
device_name = grub_file_get_device_name (dirname);
dev = grub_device_open (device_name);
if (dev)
{
fs = grub_fs_probe (dev);
path = grub_strchr (dirname, ')');
if (! path)
path = dirname;
else
path++;
if (fs)
(fs->dir) (dev, path, load_hook);
grub_device_close (dev);
}
grub_free (device_name);
return GRUB_ERR_NONE;
}
/* Load extension DIRNAME. (extensions are directories in xnu) */
grub_err_t
grub_xnu_load_kext_from_dir (char *dirname, char *osbundlerequired,
int maxrecursion)
{
grub_device_t dev;
char *plistname = 0;
char *newdirname;
char *newpath;
char *device_name;
grub_fs_t fs;
const char *path;
char *binsuffix;
int usemacos = 0;
grub_file_t binfile;
auto int load_hook (const char *filename,
const struct grub_dirhook_info *info);
int load_hook (const char *filename, const struct grub_dirhook_info *info)
{
if (grub_strlen (filename) > 15)
return 0;
grub_strcpy (newdirname + grub_strlen (dirname) + 1, filename);
/* If the kext contains directory "Contents" all real stuff is in
this directory. */
if (info->dir && grub_strcasecmp (filename, "Contents") == 0)
grub_xnu_load_kext_from_dir (newdirname, osbundlerequired,
maxrecursion - 1);
/* Directory "Plugins" contains nested kexts. */
if (info->dir && grub_strcasecmp (filename, "Plugins") == 0)
grub_xnu_scan_dir_for_kexts (newdirname, osbundlerequired,
maxrecursion - 1);
/* Directory "MacOS" contains executable, otherwise executable is
on the top. */
if (info->dir && grub_strcasecmp (filename, "MacOS") == 0)
usemacos = 1;
/* Info.plist is the file which governs our future actions. */
if (! info->dir && grub_strcasecmp (filename, "Info.plist") == 0
&& ! plistname)
plistname = grub_strdup (newdirname);
return 0;
}
newdirname = grub_malloc (grub_strlen (dirname) + 20);
if (! newdirname)
return grub_error (GRUB_ERR_OUT_OF_MEMORY, "couldn't allocate buffer");
grub_strcpy (newdirname, dirname);
newdirname[grub_strlen (dirname)] = '/';
newdirname[grub_strlen (dirname) + 1] = 0;
device_name = grub_file_get_device_name (dirname);
dev = grub_device_open (device_name);
if (dev)
{
fs = grub_fs_probe (dev);
path = grub_strchr (dirname, ')');
if (! path)
path = dirname;
else
path++;
newpath = grub_strchr (newdirname, ')');
if (! newpath)
newpath = newdirname;
else
newpath++;
/* Look at the directory. */
if (fs)
(fs->dir) (dev, path, load_hook);
if (plistname && grub_xnu_check_os_bundle_required
(plistname, osbundlerequired, &binsuffix))
{
if (binsuffix)
{
/* Open the binary. */
char *binname = grub_malloc (grub_strlen (dirname)
+ grub_strlen (binsuffix)
+ sizeof ("/MacOS/"));
grub_strcpy (binname, dirname);
if (usemacos)
grub_strcpy (binname + grub_strlen (binname), "/MacOS/");
else
grub_strcpy (binname + grub_strlen (binname), "/");
grub_strcpy (binname + grub_strlen (binname), binsuffix);
grub_dprintf ("xnu", "%s:%s\n", plistname, binname);
binfile = grub_gzfile_open (binname, 1);
if (! binfile)
grub_errno = GRUB_ERR_NONE;
/* Load the extension. */
grub_xnu_load_driver (plistname, binfile);
grub_free (binname);
grub_free (binsuffix);
}
else
{
grub_dprintf ("xnu", "%s:0\n", plistname);
grub_xnu_load_driver (plistname, 0);
}
}
grub_free (plistname);
grub_device_close (dev);
}
grub_free (device_name);
return GRUB_ERR_NONE;
}
/* Load devtree file. */
static grub_err_t
grub_cmd_xnu_devtree (grub_command_t cmd __attribute__ ((unused)),
int argc, char *args[])
{
grub_file_t file;
char *data, *endret;
grub_size_t datalen;
if (argc != 1)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "Filename required");
if (! grub_xnu_heap_size)
return grub_error (GRUB_ERR_BAD_OS, "no xnu kernel loaded");
/* Load the file. */
file = grub_gzfile_open (args[0], 1);
if (! file)
return grub_error (GRUB_ERR_FILE_NOT_FOUND, "Couldn't load device tree");
datalen = grub_file_size (file);
data = grub_malloc (datalen + 1);
if (! data)
{
grub_file_close (file);
return grub_error (GRUB_ERR_OUT_OF_MEMORY,
"Could load device tree into memory");
}
if (grub_file_read (file, data, datalen) != (grub_ssize_t) datalen)
{
grub_file_close (file);
grub_free (data);
grub_error_push ();
return grub_error (GRUB_ERR_BAD_OS, "Couldn't read file %s", args[0]);
}
grub_file_close (file);
data[datalen] = 0;
/* Parse the file. */
endret = grub_xnu_parse_devtree (&grub_xnu_devtree_root,
data, data + datalen);
grub_free (data);
if (! endret)
return grub_error (GRUB_ERR_BAD_OS, "Couldn't parse devtree");
return GRUB_ERR_NONE;
}
static int locked=0;
static grub_dl_t my_mod;
/* Load the kext. */
static grub_err_t
grub_cmd_xnu_kext (grub_command_t cmd __attribute__ ((unused)),
int argc, char *args[])
{
grub_file_t binfile = 0;
if (argc == 2)
{
/* User explicitly specified plist and binary. */
if (grub_strcmp (args[1], "-") != 0)
{
binfile = grub_gzfile_open (args[1], 1);
if (! binfile)
{
grub_error (GRUB_ERR_BAD_OS, "can't open file");
return GRUB_ERR_NONE;
}
}
return grub_xnu_load_driver (grub_strcmp (args[0], "-") ? args[0] : 0,
binfile);
}
/* load kext normally. */
if (argc == 1)
return grub_xnu_load_kext_from_dir (args[0], 0, 10);
return grub_error (GRUB_ERR_BAD_ARGUMENT, "file name required");
}
/* Load a directory containing kexts. */
static grub_err_t
grub_cmd_xnu_kextdir (grub_command_t cmd __attribute__ ((unused)),
int argc, char *args[])
{
if (argc != 1 && argc != 2)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "directory name required");
if (argc == 1)
return grub_xnu_scan_dir_for_kexts (args[0],
"console,root,local-root,network-root",
10);
else
{
char *osbundlerequired = grub_strdup (args[1]), *ptr;
grub_err_t err;
if (! osbundlerequired)
return grub_error (GRUB_ERR_OUT_OF_MEMORY,
"couldn't allocate string temporary space");
for (ptr = osbundlerequired; *ptr; ptr++)
*ptr = grub_tolower (*ptr);
err = grub_xnu_scan_dir_for_kexts (args[0], osbundlerequired, 10);
grub_free (osbundlerequired);
return err;
}
}
struct grub_video_bitmap *grub_xnu_bitmap = 0;
static grub_err_t
grub_cmd_xnu_splash (grub_command_t cmd __attribute__ ((unused)),
int argc, char *args[])
{
grub_err_t err;
if (argc != 1)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "file name required");
err = grub_video_bitmap_load (&grub_xnu_bitmap, args[0]);
if (err)
grub_xnu_bitmap = 0;
return err;
}
#ifndef GRUB_UTIL
static grub_err_t
grub_cmd_xnu_resume (grub_command_t cmd __attribute__ ((unused)),
int argc, char *args[])
{
if (argc != 1)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "file name required");
return grub_xnu_resume (args[0]);
}
#endif
void
grub_xnu_lock ()
{
if (!locked)
grub_dl_ref (my_mod);
locked = 1;
}
void
grub_xnu_unlock ()
{
if (locked)
grub_dl_unref (my_mod);
locked = 0;
}
static grub_command_t cmd_kernel, cmd_mkext, cmd_kext, cmd_kextdir,
cmd_ramdisk, cmd_devtree, cmd_resume, cmd_splash;
GRUB_MOD_INIT(xnu)
{
cmd_kernel = grub_register_command ("xnu_kernel", grub_cmd_xnu_kernel, 0,
"load a xnu kernel");
cmd_mkext = grub_register_command ("xnu_mkext", grub_cmd_xnu_mkext, 0,
"Load XNU extension package.");
cmd_kext = grub_register_command ("xnu_kext", grub_cmd_xnu_kext, 0,
"Load XNU extension.");
cmd_kextdir = grub_register_command ("xnu_kextdir", grub_cmd_xnu_kextdir,
"xnu_kextdir DIRECTORY [OSBundleRequired]",
"Load XNU extension directory");
cmd_ramdisk = grub_register_command ("xnu_ramdisk", grub_cmd_xnu_ramdisk, 0,
"Load XNU ramdisk. "
"It will be seen as md0");
cmd_devtree = grub_register_command ("xnu_devtree", grub_cmd_xnu_devtree, 0,
"Load XNU devtree");
cmd_splash = grub_register_command ("xnu_splash", grub_cmd_xnu_splash, 0,
"Load a splash image for XNU");
#ifndef GRUB_UTIL
cmd_resume = grub_register_command ("xnu_resume", grub_cmd_xnu_resume,
0, "Load XNU hibernate image.");
#endif
my_mod=mod;
}
GRUB_MOD_FINI(xnu)
{
#ifndef GRUB_UTIL
grub_unregister_command (cmd_resume);
#endif
grub_unregister_command (cmd_mkext);
grub_unregister_command (cmd_kext);
grub_unregister_command (cmd_kextdir);
grub_unregister_command (cmd_devtree);
grub_unregister_command (cmd_ramdisk);
grub_unregister_command (cmd_kernel);
grub_unregister_command (cmd_splash);
}
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