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2006-05-28 Yoshinori K. Okuji <okuji@enbug.org>

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* fs/hfsplus.c (grub_hfsplus_btree_recoffset): Moved to near the
        top.
        (grub_hfsplus_btree_recptr): Likewise.
        (grub_hfsplus_find_block): Do not take RETRY any longer. Use
        FILEBLOCK both to pass a block number and store next block
        number.
        (grub_hfsplus_read_block): Rewritten heavily to support an extent
        overflow file correctly. Specify errors appropriately, because
        fshelp expects that GRUB_ERRNO is set when fails. Reuse
        grub_hfsplus_btree_recptr to get the pointer to a found key.
        (grub_hfsplus_btree_search): Return 1 instead of 0 when no match
        is found.

        * conf/i386-efi.rmk (pkgdata_MODULES): Added _linux.mod and
        linux.mod.
        (_linux_mod_SOURCES): New variable.
        (_linux_mod_CFLAGS): Likewise.
        (_linux_mod_LDFLAGS): Likewise.
        (linux_mod_SOURCES): Likewise.
        (linux_mod_CFLAGS): Likewise.
        (linux_mod_LDFLAGS): Likewise.

        * DISTLIST: Added loader/i386/efi/linux.c,
        loader/i386/efi/linux_normal.c and
        include/grub/i386/efi/loader.h.

        * loader/i386/efi/linux.c: New file.
        * loader/i386/efi/linux_normal.c: Likewise.
        * include/grub/i386/efi/loader.h: Likewise.
This commit is contained in:
okuji 2006-05-28 03:20:18 +00:00
parent 43b553ada7
commit 118f4fb31e
9 changed files with 1022 additions and 58 deletions
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32
ChangeLog
View file

@ -1,3 +1,35 @@
2006-05-28 Yoshinori K. Okuji <okuji@enbug.org>
* fs/hfsplus.c (grub_hfsplus_btree_recoffset): Moved to near the
top.
(grub_hfsplus_btree_recptr): Likewise.
(grub_hfsplus_find_block): Do not take RETRY any longer. Use
FILEBLOCK both to pass a block number and store next block
number.
(grub_hfsplus_read_block): Rewritten heavily to support an extent
overflow file correctly. Specify errors appropriately, because
fshelp expects that GRUB_ERRNO is set when fails. Reuse
grub_hfsplus_btree_recptr to get the pointer to a found key.
(grub_hfsplus_btree_search): Return 1 instead of 0 when no match
is found.
* conf/i386-efi.rmk (pkgdata_MODULES): Added _linux.mod and
linux.mod.
(_linux_mod_SOURCES): New variable.
(_linux_mod_CFLAGS): Likewise.
(_linux_mod_LDFLAGS): Likewise.
(linux_mod_SOURCES): Likewise.
(linux_mod_CFLAGS): Likewise.
(linux_mod_LDFLAGS): Likewise.
* DISTLIST: Added loader/i386/efi/linux.c,
loader/i386/efi/linux_normal.c and
include/grub/i386/efi/loader.h.
* loader/i386/efi/linux.c: New file.
* loader/i386/efi/linux_normal.c: Likewise.
* include/grub/i386/efi/loader.h: Likewise.
2006-05-27 Yoshinori K. Okuji <okuji@enbug.org>
* commands/blocklist.c: New file.

3
DISTLIST
View file

@ -122,6 +122,7 @@ include/grub/efi/time.h
include/grub/i386/setjmp.h
include/grub/i386/types.h
include/grub/i386/efi/kernel.h
include/grub/i386/efi/loader.h
include/grub/i386/efi/time.h
include/grub/i386/pc/biosdisk.h
include/grub/i386/pc/boot.h
@ -200,6 +201,8 @@ kern/sparc64/ieee1275/init.c
kern/sparc64/ieee1275/openfw.c
loader/efi/chainloader.c
loader/efi/chainloader_normal.c
loader/i386/efi/linux.c
loader/i386/efi/linux_normal.c
loader/i386/pc/chainloader.c
loader/i386/pc/chainloader_normal.c
loader/i386/pc/linux.c

27
NEWS
View file

@ -1,3 +1,30 @@
New in 1.94:
* Fix several serious bugs in HFS+.
* Add experimental EFI support. Chainloading and Linux loading are
supported at the moment.
* Add a new command "blocklist" to show a block list.
* Use --with-platform to specify a boot environment. For now, efi,
ieee1275 and pc are supported.
* Use the filename "kernel.elf" instead of "grubof" on ieee1275.
* Install GRUB into pkglibdir instead of pkgdatadir.
* Support environmental variables. You can export variables by the
command "export".
* Remove the commands "default" and "timeout". They are now variables.
* Add the commands "source" and "." to include a file.
* Implement experimental Video API and a new terminal "gfxterm" based
on the Video API.
New in 1.93 - 2006-03-10:
* Add support for the HFS+ wrapper.

115
conf/i386-efi.mk
View file

@ -111,7 +111,8 @@ genmoddep-util_genmoddep.d: util/genmoddep.c
#grub_install_SOURCES = util/efi/pc/grub-install.in
# Modules.
pkgdata_MODULES = kernel.mod normal.mod _chain.mod chain.mod
pkgdata_MODULES = kernel.mod normal.mod _chain.mod chain.mod \
_linux.mod linux.mod
# For kernel.mod.
kernel_mod_EXPORTS = no
@ -1047,4 +1048,116 @@ fs-chain_mod-loader_efi_chainloader_normal.lst: loader/efi/chainloader_normal.c
chain_mod_CFLAGS = $(COMMON_CFLAGS)
chain_mod_LDFLAGS = $(COMMON_LDFLAGS)
# For _linux.mod.
_linux_mod_SOURCES = loader/i386/efi/linux.c
CLEANFILES += _linux.mod mod-_linux.o mod-_linux.c pre-_linux.o _linux_mod-loader_i386_efi_linux.o und-_linux.lst
ifneq ($(_linux_mod_EXPORTS),no)
CLEANFILES += def-_linux.lst
DEFSYMFILES += def-_linux.lst
endif
MOSTLYCLEANFILES += _linux_mod-loader_i386_efi_linux.d
UNDSYMFILES += und-_linux.lst
_linux.mod: pre-_linux.o mod-_linux.o
-rm -f $@
$(CC) $(_linux_mod_LDFLAGS) $(LDFLAGS) -Wl,-r,-d -o $@ $^
$(STRIP) --strip-unneeded -K grub_mod_init -K grub_mod_fini -R .note -R .comment $@
pre-_linux.o: _linux_mod-loader_i386_efi_linux.o
-rm -f $@
$(CC) $(_linux_mod_LDFLAGS) $(LDFLAGS) -Wl,-r,-d -o $@ $^
mod-_linux.o: mod-_linux.c
$(CC) $(CPPFLAGS) $(CFLAGS) $(_linux_mod_CFLAGS) -c -o $@ $<
mod-_linux.c: moddep.lst genmodsrc.sh
sh $(srcdir)/genmodsrc.sh '_linux' $< > $@ || (rm -f $@; exit 1)
ifneq ($(_linux_mod_EXPORTS),no)
def-_linux.lst: pre-_linux.o
$(NM) -g --defined-only -P -p $< | sed 's/^\([^ ]*\).*/\1 _linux/' > $@
endif
und-_linux.lst: pre-_linux.o
echo '_linux' > $@
$(NM) -u -P -p $< | cut -f1 -d' ' >> $@
_linux_mod-loader_i386_efi_linux.o: loader/i386/efi/linux.c
$(CC) -Iloader/i386/efi -I$(srcdir)/loader/i386/efi $(CPPFLAGS) $(CFLAGS) $(_linux_mod_CFLAGS) -c -o $@ $<
_linux_mod-loader_i386_efi_linux.d: loader/i386/efi/linux.c
set -e; $(CC) -Iloader/i386/efi -I$(srcdir)/loader/i386/efi $(CPPFLAGS) $(CFLAGS) $(_linux_mod_CFLAGS) -M $< | sed 's,linux\.o[ :]*,_linux_mod-loader_i386_efi_linux.o $@ : ,g' > $@; [ -s $@ ] || rm -f $@
-include _linux_mod-loader_i386_efi_linux.d
CLEANFILES += cmd-_linux_mod-loader_i386_efi_linux.lst fs-_linux_mod-loader_i386_efi_linux.lst
COMMANDFILES += cmd-_linux_mod-loader_i386_efi_linux.lst
FSFILES += fs-_linux_mod-loader_i386_efi_linux.lst
cmd-_linux_mod-loader_i386_efi_linux.lst: loader/i386/efi/linux.c gencmdlist.sh
set -e; $(CC) -Iloader/i386/efi -I$(srcdir)/loader/i386/efi $(CPPFLAGS) $(CFLAGS) $(_linux_mod_CFLAGS) -E $< | sh $(srcdir)/gencmdlist.sh _linux > $@ || (rm -f $@; exit 1)
fs-_linux_mod-loader_i386_efi_linux.lst: loader/i386/efi/linux.c genfslist.sh
set -e; $(CC) -Iloader/i386/efi -I$(srcdir)/loader/i386/efi $(CPPFLAGS) $(CFLAGS) $(_linux_mod_CFLAGS) -E $< | sh $(srcdir)/genfslist.sh _linux > $@ || (rm -f $@; exit 1)
_linux_mod_CFLAGS = $(COMMON_CFLAGS)
_linux_mod_LDFLAGS = $(COMMON_LDFLAGS)
# For linux.mod.
linux_mod_SOURCES = loader/i386/efi/linux_normal.c
CLEANFILES += linux.mod mod-linux.o mod-linux.c pre-linux.o linux_mod-loader_i386_efi_linux_normal.o und-linux.lst
ifneq ($(linux_mod_EXPORTS),no)
CLEANFILES += def-linux.lst
DEFSYMFILES += def-linux.lst
endif
MOSTLYCLEANFILES += linux_mod-loader_i386_efi_linux_normal.d
UNDSYMFILES += und-linux.lst
linux.mod: pre-linux.o mod-linux.o
-rm -f $@
$(CC) $(linux_mod_LDFLAGS) $(LDFLAGS) -Wl,-r,-d -o $@ $^
$(STRIP) --strip-unneeded -K grub_mod_init -K grub_mod_fini -R .note -R .comment $@
pre-linux.o: linux_mod-loader_i386_efi_linux_normal.o
-rm -f $@
$(CC) $(linux_mod_LDFLAGS) $(LDFLAGS) -Wl,-r,-d -o $@ $^
mod-linux.o: mod-linux.c
$(CC) $(CPPFLAGS) $(CFLAGS) $(linux_mod_CFLAGS) -c -o $@ $<
mod-linux.c: moddep.lst genmodsrc.sh
sh $(srcdir)/genmodsrc.sh 'linux' $< > $@ || (rm -f $@; exit 1)
ifneq ($(linux_mod_EXPORTS),no)
def-linux.lst: pre-linux.o
$(NM) -g --defined-only -P -p $< | sed 's/^\([^ ]*\).*/\1 linux/' > $@
endif
und-linux.lst: pre-linux.o
echo 'linux' > $@
$(NM) -u -P -p $< | cut -f1 -d' ' >> $@
linux_mod-loader_i386_efi_linux_normal.o: loader/i386/efi/linux_normal.c
$(CC) -Iloader/i386/efi -I$(srcdir)/loader/i386/efi $(CPPFLAGS) $(CFLAGS) $(linux_mod_CFLAGS) -c -o $@ $<
linux_mod-loader_i386_efi_linux_normal.d: loader/i386/efi/linux_normal.c
set -e; $(CC) -Iloader/i386/efi -I$(srcdir)/loader/i386/efi $(CPPFLAGS) $(CFLAGS) $(linux_mod_CFLAGS) -M $< | sed 's,linux_normal\.o[ :]*,linux_mod-loader_i386_efi_linux_normal.o $@ : ,g' > $@; [ -s $@ ] || rm -f $@
-include linux_mod-loader_i386_efi_linux_normal.d
CLEANFILES += cmd-linux_mod-loader_i386_efi_linux_normal.lst fs-linux_mod-loader_i386_efi_linux_normal.lst
COMMANDFILES += cmd-linux_mod-loader_i386_efi_linux_normal.lst
FSFILES += fs-linux_mod-loader_i386_efi_linux_normal.lst
cmd-linux_mod-loader_i386_efi_linux_normal.lst: loader/i386/efi/linux_normal.c gencmdlist.sh
set -e; $(CC) -Iloader/i386/efi -I$(srcdir)/loader/i386/efi $(CPPFLAGS) $(CFLAGS) $(linux_mod_CFLAGS) -E $< | sh $(srcdir)/gencmdlist.sh linux > $@ || (rm -f $@; exit 1)
fs-linux_mod-loader_i386_efi_linux_normal.lst: loader/i386/efi/linux_normal.c genfslist.sh
set -e; $(CC) -Iloader/i386/efi -I$(srcdir)/loader/i386/efi $(CPPFLAGS) $(CFLAGS) $(linux_mod_CFLAGS) -E $< | sh $(srcdir)/genfslist.sh linux > $@ || (rm -f $@; exit 1)
linux_mod_CFLAGS = $(COMMON_CFLAGS)
linux_mod_LDFLAGS = $(COMMON_LDFLAGS)
include $(srcdir)/conf/common.mk

13
conf/i386-efi.rmk
View file

@ -67,7 +67,8 @@ genmoddep_SOURCES = util/genmoddep.c
#grub_install_SOURCES = util/efi/pc/grub-install.in
# Modules.
pkgdata_MODULES = kernel.mod normal.mod _chain.mod chain.mod
pkgdata_MODULES = kernel.mod normal.mod _chain.mod chain.mod \
_linux.mod linux.mod
# For kernel.mod.
kernel_mod_EXPORTS = no
@ -115,4 +116,14 @@ chain_mod_SOURCES = loader/efi/chainloader_normal.c
chain_mod_CFLAGS = $(COMMON_CFLAGS)
chain_mod_LDFLAGS = $(COMMON_LDFLAGS)
# For _linux.mod.
_linux_mod_SOURCES = loader/i386/efi/linux.c
_linux_mod_CFLAGS = $(COMMON_CFLAGS)
_linux_mod_LDFLAGS = $(COMMON_LDFLAGS)
# For linux.mod.
linux_mod_SOURCES = loader/i386/efi/linux_normal.c
linux_mod_CFLAGS = $(COMMON_CFLAGS)
linux_mod_LDFLAGS = $(COMMON_LDFLAGS)
include $(srcdir)/conf/common.mk

105
fs/hfsplus.c
View file

@ -226,15 +226,41 @@ static grub_dl_t my_mod;
#endif
/* Return the offset of the record with the index INDEX, in the node
NODE which is part of the B+ tree BTREE. */
static inline unsigned int
grub_hfsplus_btree_recoffset (struct grub_hfsplus_btree *btree,
struct grub_hfsplus_btnode *node, int index)
{
char *cnode = (char *) node;
grub_uint16_t *recptr;
recptr = (grub_uint16_t *) (&cnode[btree->nodesize
- index * sizeof (grub_uint16_t) - 2]);
return grub_be_to_cpu16 (*recptr);
}
/* Return a pointer to the record with the index INDEX, in the node
NODE which is part of the B+ tree BTREE. */
static inline struct grub_hfsplus_key *
grub_hfsplus_btree_recptr (struct grub_hfsplus_btree *btree,
struct grub_hfsplus_btnode *node, int index)
{
char *cnode = (char *) node;
unsigned int offset;
offset = grub_hfsplus_btree_recoffset (btree, node, index);
return (struct grub_hfsplus_key *) &cnode[offset];
}
/* Find the extent that points to FILEBLOCK. If it is not in one of
the 8 extents described by EXTENT, return -1. In that case set
RETRY to the last block that was found in the last extent. */
FILEBLOCK to the next block. */
static int
grub_hfsplus_find_block (struct grub_hfsplus_extent *extent,
int fileblock, int *retry)
int *fileblock)
{
int i;
grub_size_t blksleft = fileblock;
grub_size_t blksleft = *fileblock;
/* First lookup the file in the given extents. */
for (i = 0; i < 8; i++)
@ -244,7 +270,7 @@ grub_hfsplus_find_block (struct grub_hfsplus_extent *extent,
blksleft -= grub_be_to_cpu32 (extent[i].count);
}
*retry = fileblock - blksleft;
*fileblock = blksleft;
return -1;
}
@ -263,21 +289,19 @@ static int grub_hfsplus_cmp_extkey (struct grub_hfsplus_key *keya,
static int
grub_hfsplus_read_block (grub_fshelp_node_t node, int fileblock)
{
struct grub_hfsplus_extkey_internal extoverflow;
struct grub_hfsplus_extkey *keyfound;
int blk;
struct grub_hfsplus_btnode *nnode = 0;
int ptr;
int retry = 0;
int blksleft = fileblock;
struct grub_hfsplus_extent *extents = &node->extents[0];
while (1)
{
char *cnode;
struct grub_hfsplus_extkey *key;
struct grub_hfsplus_extkey_internal extoverflow;
int blk;
int ptr;
/* Try to find this block in the current set of extents. */
blk = grub_hfsplus_find_block (extents, fileblock, &retry);
blk = grub_hfsplus_find_block (extents, &blksleft);
/* The previous iteration of this loop allocated memory. The
code above used this memory, it can be free'ed now. */
@ -293,30 +317,33 @@ grub_hfsplus_read_block (grub_fshelp_node_t node, int fileblock)
the extent overflow file. If this happens, you found a
bug... */
if (node->fileid == GRUB_HFSPLUS_FILEID_OVERFLOW)
{
grub_error (GRUB_ERR_READ_ERROR,
"extra extents found in an extend overflow file");
break;
}
/* Set up the key to look for in the extent overflow file. */
extoverflow.fileid = node->fileid;
extoverflow.start = retry;
extoverflow.start = fileblock - blksleft;
if (grub_hfsplus_btree_search (&node->data->extoverflow_tree,
(struct grub_hfsplus_key_internal *) &extoverflow,
grub_hfsplus_cmp_extkey, &nnode, &ptr))
{
grub_error (GRUB_ERR_READ_ERROR,
"no block found for the file id 0x%x and the block offset 0x%x",
node->fileid, fileblock);
break;
}
cnode = (char *) nnode;
/* The extent overflow file has a 8 extents right after the key. */
keyfound = (struct grub_hfsplus_extkey *)
&cnode[(int) cnode[node->data->extoverflow_tree.nodesize - ptr - 1]];
extents = (struct grub_hfsplus_extent *)
((char *) keyfound + sizeof (struct grub_hfsplus_extkey));
/* The extent overflow file has 8 extents right after the key. */
key = (struct grub_hfsplus_extkey *)
grub_hfsplus_btree_recptr (&node->data->extoverflow_tree, nnode, ptr);
extents = (struct grub_hfsplus_extent *) (key + 1);
/* The block wasn't found. Perhaps the next iteration will find
it. The last block we found is stored in FILEBLOCK now. */
/* XXX: Multiple iterations for locating the right extent was
not tested enough... */
fileblock = retry;
it. The last block we found is stored in BLKSLEFT now. */
}
grub_free (nnode);
@ -517,32 +544,6 @@ grub_hfsplus_cmp_extkey (struct grub_hfsplus_key *keya,
return diff;
}
/* Return the offset of the record with the index INDEX, in the node
NODE which is part of the B+ tree BTREE. */
static inline unsigned int
grub_hfsplus_btree_recoffset (struct grub_hfsplus_btree *btree,
struct grub_hfsplus_btnode *node, int index)
{
char *cnode = (char *) node;
grub_uint16_t *recptr;
recptr = (grub_uint16_t *) (&cnode[btree->nodesize
- index * sizeof (grub_uint16_t) - 2]);
return grub_be_to_cpu16 (*recptr);
}
/* Return a pointer to the record with the index INDEX, in the node
NODE which is part of the B+ tree BTREE. */
static inline struct grub_hfsplus_key *
grub_hfsplus_btree_recptr (struct grub_hfsplus_btree *btree,
struct grub_hfsplus_btnode *node, int index)
{
char *cnode = (char *) node;
unsigned int offset;
offset = grub_hfsplus_btree_recoffset (btree, node, index);
return (struct grub_hfsplus_key *) &cnode[offset];
}
static char *
grub_hfsplus_read_symlink (grub_fshelp_node_t node)
{
@ -675,13 +676,13 @@ grub_hfsplus_btree_search (struct grub_hfsplus_btree *btree,
}
}
/* No match was found, no record with this key exists in the
/* No match is found, no record with this key exists in the
tree. */
if (! match)
{
*matchnode = 0;
grub_free (node);
return 0;
return 1;
}
}
}

28
include/grub/i386/efi/loader.h Normal file
View file

@ -0,0 +1,28 @@
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2002,2003,2004,2006 Free Software Foundation, Inc.
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef GRUB_LOADER_MACHINE_HEADER
#define GRUB_LOADER_MACHINE_HEADER 1
/* It is necessary to export these functions, because normal mode commands
reuse rescue mode commands. */
void grub_rescue_cmd_linux (int argc, char *argv[]);
void grub_rescue_cmd_initrd (int argc, char *argv[]);
#endif /* ! GRUB_LOADER_MACHINE_HEADER */

688
loader/i386/efi/linux.c Normal file
View file

@ -0,0 +1,688 @@
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2006 Free Software Foundation, Inc.
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <grub/loader.h>
#include <grub/machine/loader.h>
#include <grub/file.h>
#include <grub/disk.h>
#include <grub/err.h>
#include <grub/misc.h>
#include <grub/types.h>
#include <grub/rescue.h>
#include <grub/dl.h>
#include <grub/mm.h>
#include <grub/term.h>
#include <grub/cpu/linux.h>
#include <grub/efi/api.h>
#include <grub/efi/efi.h>
#define NEXT_MEMORY_DESCRIPTOR(desc, size) \
((grub_efi_memory_descriptor_t *) ((char *) (desc) + (size)))
static grub_dl_t my_mod;
static grub_size_t linux_mem_size;
static int loaded;
static void *real_mode_mem;
static void *prot_mode_mem;
static void *initrd_mem;
static grub_efi_uintn_t real_mode_pages;
static grub_efi_uintn_t prot_mode_pages;
static grub_efi_uintn_t initrd_pages;
static void *mmap_buf;
static grub_uint8_t gdt[] __attribute__ ((aligned(16))) =
{
/* NULL. */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* Reserved. */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* Code segment. */
0xFF, 0xFF, 0x00, 0x00, 0x00, 0x9A, 0xCF, 0x00,
/* Data segment. */
0xFF, 0xFF, 0x00, 0x00, 0x00, 0x92, 0xCF, 0x00
};
struct gdt_descriptor
{
grub_uint16_t dummy;
grub_uint16_t limit;
grub_uint32_t base;
} __attribute__ ((aligned(4), packed));
static struct gdt_descriptor gdt_desc =
{
0,
sizeof (gdt) - 1,
(grub_addr_t) gdt
};
struct idt_descriptor
{
grub_uint16_t dummy;
grub_uint16_t limit;
grub_uint32_t base;
} __attribute__ ((aligned(4)));
static struct idt_descriptor idt_desc =
{
0,
0,
0
};
static inline grub_size_t
page_align (grub_size_t size)
{
return (size + (1 << 12) - 1) & (~((1 << 12) - 1));
}
/* Find the optimal number of pages for the memory map. Is it better to
move this code to efi/mm.c? */
static grub_efi_uintn_t
find_mmap_size (void)
{
static grub_efi_uintn_t mmap_size = 0;
if (mmap_size != 0)
return mmap_size;
mmap_size = (1 << 12);
while (1)
{
int ret;
grub_efi_memory_descriptor_t *mmap;
grub_efi_uintn_t desc_size;
mmap = grub_malloc (mmap_size);
if (! mmap)
return 0;
ret = grub_efi_get_memory_map (&mmap_size, mmap, 0, &desc_size, 0);
grub_free (mmap);
if (ret < 0)
grub_fatal ("cannot get memory map");
else if (ret > 0)
break;
mmap_size += (1 << 12);
}
/* Increase the size a bit for safety, because GRUB allocates more on
later, and EFI itself may allocate more. */
mmap_size += (1 << 12);
return page_align (mmap_size);
}
static void
free_pages (void)
{
if (real_mode_mem)
{
grub_efi_free_pages ((grub_addr_t) real_mode_mem, real_mode_pages);
real_mode_mem = 0;
}
if (prot_mode_mem)
{
grub_efi_free_pages ((grub_addr_t) prot_mode_mem, prot_mode_pages);
prot_mode_mem = 0;
}
if (initrd_mem)
{
grub_efi_free_pages ((grub_addr_t) initrd_mem, initrd_pages);
initrd_mem = 0;
}
}
/* Allocate pages for the real mode code and the protected mode code
for linux as well as a memory map buffer. */
static int
allocate_pages (grub_size_t real_size, grub_size_t prot_size)
{
grub_efi_uintn_t desc_size;
grub_efi_memory_descriptor_t *mmap, *mmap_end;
grub_efi_uintn_t mmap_size, tmp_mmap_size;
grub_efi_memory_descriptor_t *desc;
/* Make sure that each size is aligned to a page boundary. */
real_size = page_align (real_size + GRUB_DISK_SECTOR_SIZE);
prot_size = page_align (prot_size);
mmap_size = find_mmap_size ();
grub_dprintf ("linux", "real_size = %x, prot_size = %x, mmap_size = %x\n",
real_size, prot_size, mmap_size);
/* Calculate the number of pages; Combine the real mode code with
the memory map buffer for simplicity. */
real_mode_pages = ((real_size + mmap_size) >> 12);
prot_mode_pages = (prot_size >> 12);
/* Initialize the memory pointers with NULL for convenience. */
real_mode_mem = 0;
prot_mode_mem = 0;
/* Read the memory map temporarily, to find free space. */
mmap = grub_malloc (mmap_size);
if (! mmap)
return 0;
tmp_mmap_size = mmap_size;
if (grub_efi_get_memory_map (&tmp_mmap_size, mmap, 0, &desc_size, 0) <= 0)
grub_fatal ("cannot get memory map");
mmap_end = NEXT_MEMORY_DESCRIPTOR (mmap, tmp_mmap_size);
/* First, find free pages for the real mode code
and the memory map buffer. */
for (desc = mmap;
desc < mmap_end;
desc = NEXT_MEMORY_DESCRIPTOR (desc, desc_size))
{
/* Probably it is better to put the real mode code in the traditional
space for safety. */
if (desc->type == GRUB_EFI_CONVENTIONAL_MEMORY
&& desc->physical_start <= 0x90000
&& desc->num_pages >= real_mode_pages)
{
grub_efi_physical_address_t physical_end;
grub_efi_physical_address_t addr;
physical_end = desc->physical_start + (desc->num_pages << 12);
if (physical_end > 0x90000)
physical_end = 0x90000;
grub_dprintf ("linux", "physical_start = %x, physical_end = %x\n",
(unsigned) desc->physical_start,
(unsigned) physical_end);
addr = physical_end - real_size - mmap_size;
if (addr < 0x10000)
continue;
grub_dprintf ("linux", "trying to allocate %u pages at %x\n",
real_mode_pages, (unsigned) addr);
real_mode_mem = grub_efi_allocate_pages (addr, real_mode_pages);
if (! real_mode_mem)
grub_fatal ("cannot allocate pages");
desc->num_pages -= real_mode_pages;
break;
}
}
if (! real_mode_mem)
{
grub_error (GRUB_ERR_OUT_OF_MEMORY, "cannot allocate real mode pages");
goto fail;
}
mmap_buf = (void *) ((char *) real_mode_mem + real_size);
/* Next, find free pages for the protected mode code. */
/* XXX what happens if anything is using this address? */
prot_mode_mem = grub_efi_allocate_pages (0x100000, prot_mode_pages);
if (! prot_mode_mem)
{
grub_error (GRUB_ERR_OUT_OF_MEMORY,
"cannot allocate protected mode pages");
goto fail;
}
grub_free (mmap);
return 1;
fail:
grub_free (mmap);
free_pages ();
return 0;
}
static grub_err_t
grub_linux_boot (void)
{
struct linux_kernel_header *lh;
struct linux_kernel_params *params;
grub_efi_uintn_t mmap_size;
grub_efi_uintn_t map_key;
grub_efi_uintn_t desc_size;
grub_efi_uint32_t desc_version;
lh = real_mode_mem;
params = real_mode_mem;
grub_dprintf ("linux", "code32_start = %x, idt_desc = %x, gdt_desc = %x\n",
(unsigned) lh->code32_start, (grub_addr_t) &(idt_desc.limit),
(grub_addr_t) &(gdt_desc.limit));
grub_dprintf ("linux", "idt = %x:%x, gdt = %x:%x\n",
(unsigned) idt_desc.limit, (unsigned) idt_desc.base,
(unsigned) gdt_desc.limit, (unsigned) gdt_desc.base);
mmap_size = find_mmap_size ();
if (grub_efi_get_memory_map (&mmap_size, mmap_buf, &map_key,
&desc_size, &desc_version) <= 0)
grub_fatal ("cannot get memory map");
if (! grub_efi_exit_boot_services (map_key))
grub_fatal ("cannot exit boot services");
/* Note that no boot services are available from here. */
/* Hardware interrupts are not safe any longer. */
asm volatile ("cli" : : );
/* Pass EFI parameters. */
params->efi_mem_desc_size = desc_size;
params->efi_mem_desc_version = desc_version;
params->efi_mmap = (grub_addr_t) mmap_buf;
params->efi_mmap_size = mmap_size;
/* Pass parameters. */
asm volatile ("movl %0, %%esi" : : "m" (real_mode_mem));
asm volatile ("movl %0, %%ecx" : : "m" (lh->code32_start));
asm volatile ("xorl %%ebx, %%ebx" : : );
/* Load the IDT and the GDT for the bootstrap. */
asm volatile ("lidt %0" : : "m" (idt_desc.limit));
asm volatile ("lgdt %0" : : "m" (gdt_desc.limit));
/* Enter Linux. */
asm volatile ("jmp *%%ecx" : : );
/* Never reach here. */
return GRUB_ERR_NONE;
}
static grub_err_t
grub_linux_unload (void)
{
free_pages ();
grub_dl_unref (my_mod);
loaded = 0;
return GRUB_ERR_NONE;
}
void
grub_rescue_cmd_linux (int argc, char *argv[])
{
grub_file_t file = 0;
struct linux_kernel_header lh;
struct linux_kernel_params *params;
grub_uint8_t setup_sects;
grub_size_t real_size, prot_size;
grub_ssize_t len;
int i;
char *dest;
grub_dl_ref (my_mod);
if (argc == 0)
{
grub_error (GRUB_ERR_BAD_ARGUMENT, "no kernel specified");
goto fail;
}
file = grub_file_open (argv[0]);
if (! file)
goto fail;
if (grub_file_read (file, (char *) &lh, sizeof (lh)) != sizeof (lh))
{
grub_error (GRUB_ERR_READ_ERROR, "cannot read the linux header");
goto fail;
}
if (lh.boot_flag != grub_cpu_to_le16 (0xaa55))
{
grub_error (GRUB_ERR_BAD_OS, "invalid magic number");
goto fail;
}
if (lh.setup_sects > GRUB_LINUX_MAX_SETUP_SECTS)
{
grub_error (GRUB_ERR_BAD_OS, "too many setup sectors");
goto fail;
}
/* EFI support is quite new, so reject old versions. */
if (lh.header != grub_cpu_to_le32 (GRUB_LINUX_MAGIC_SIGNATURE)
|| grub_le_to_cpu16 (lh.version) < 0x0203)
{
grub_error (GRUB_ERR_BAD_OS, "too old version");
goto fail;
}
/* I'm not sure how to support zImage on EFI. */
if (! (lh.loadflags & GRUB_LINUX_FLAG_BIG_KERNEL))
{
grub_error (GRUB_ERR_BAD_OS, "zImage is not supported");
goto fail;
}
setup_sects = lh.setup_sects;
/* If SETUP_SECTS is not set, set it to the default (4). */
if (! setup_sects)
setup_sects = GRUB_LINUX_DEFAULT_SETUP_SECTS;
real_size = setup_sects << GRUB_DISK_SECTOR_BITS;
prot_size = grub_file_size (file) - real_size - GRUB_DISK_SECTOR_SIZE;
if (! allocate_pages (real_size, prot_size))
goto fail;
/* XXX Linux assumes that only elilo can boot Linux on EFI!!! */
lh.type_of_loader = 0x50;
lh.cl_magic = GRUB_LINUX_CL_MAGIC;
lh.cl_offset = GRUB_LINUX_CL_END_OFFSET;
lh.cmd_line_ptr = (char *) real_mode_mem + GRUB_LINUX_CL_OFFSET;
lh.ramdisk_image = 0;
lh.ramdisk_size = 0;
params = (struct linux_kernel_params *) &lh;
/* These are not needed to be precise, because Linux uses these values
only to raise an error when the decompression code cannot find good
space. */
params->ext_mem = ((32 * 0x100000) >> 10);
params->alt_mem = ((32 * 0x100000) >> 10);
params->video_cursor_x = grub_efi_system_table->con_out->mode->cursor_column;
params->video_cursor_y = grub_efi_system_table->con_out->mode->cursor_row;
params->video_page = 0; /* ??? */
params->video_mode = grub_efi_system_table->con_out->mode->mode;
params->video_width = (grub_getwh () >> 8);
params->video_ega_bx = 0;
params->video_height = (grub_getwh () & 0xff);
params->have_vga = 0;
params->font_size = 16; /* XXX */
/* No VBE on EFI. */
params->lfb_width = 0;
params->lfb_height = 0;
params->lfb_depth = 0;
params->lfb_base = 0;
params->lfb_size = 0;
params->lfb_line_len = 0;
params->red_mask_size = 0;
params->red_field_pos = 0;
params->green_mask_size = 0;
params->green_field_pos = 0;
params->blue_mask_size = 0;
params->blue_field_pos = 0;
params->reserved_mask_size = 0;
params->reserved_field_pos = 0;
params->vesapm_segment = 0;
params->vesapm_offset = 0;
params->lfb_pages = 0;
params->vesa_attrib = 0;
/* No APM on EFI. */
params->apm_version = 0;
params->apm_code_segment = 0;
params->apm_entry = 0;
params->apm_16bit_code_segment = 0;
params->apm_data_segment = 0;
params->apm_flags = 0;
params->apm_code_len = 0;
params->apm_data_len = 0;
/* XXX is there any way to use SpeedStep on EFI? */
params->ist_signature = 0;
params->ist_command = 0;
params->ist_event = 0;
params->ist_perf_level = 0;
/* Let the kernel probe the information. */
grub_memset (params->hd0_drive_info, 0, sizeof (params->hd0_drive_info));
grub_memset (params->hd1_drive_info, 0, sizeof (params->hd1_drive_info));
/* No MCA on EFI. */
params->rom_config_len = 0;
params->efi_signature = GRUB_LINUX_EFI_SIGNATURE; /* XXX not used */
params->efi_system_table = (grub_addr_t) grub_efi_system_table;
/* The other EFI parameters are filled when booting. */
/* No need to fake the BIOS's memory map. */
params->mmap_size = 0;
/* Let the kernel probe the information. */
params->ps_mouse = 0;
/* Clear padding for future compatibility. */
grub_memset (params->padding1, 0, sizeof (params->padding1));
grub_memset (params->padding2, 0, sizeof (params->padding2));
grub_memset (params->padding3, 0, sizeof (params->padding3));
grub_memset (params->padding4, 0, sizeof (params->padding4));
grub_memset (params->padding5, 0, sizeof (params->padding5));
grub_memset (params->padding6, 0, sizeof (params->padding6));
grub_memset (params->padding7, 0, sizeof (params->padding7));
grub_memset (params->padding8, 0, sizeof (params->padding8));
grub_memset (params->padding9, 0, sizeof (params->padding9));
/* Put the real mode code at the real location. */
grub_memmove (real_mode_mem, &lh, sizeof (lh));
len = real_size + GRUB_DISK_SECTOR_SIZE - sizeof (lh);
if (grub_file_read (file, (char *) real_mode_mem + sizeof (lh), len) != len)
{
grub_error (GRUB_ERR_FILE_READ_ERROR, "Couldn't read file");
goto fail;
}
/* XXX there is no way to know if the kernel really supports EFI. */
grub_printf (" [Linux-EFI, setup=0x%x, size=0x%x]\n",
real_size, prot_size);
/* Detect explicitly specified memory size, if any. */
linux_mem_size = 0;
for (i = 1; i < argc; i++)
if (grub_memcmp (argv[i], "mem=", 4) == 0)
{
char *val = argv[i] + 4;
linux_mem_size = grub_strtoul (val, &val, 0);
if (grub_errno)
{
grub_errno = GRUB_ERR_NONE;
linux_mem_size = 0;
}
else
{
int shift = 0;
switch (grub_tolower (val[0]))
{
case 'g':
shift += 10;
case 'm':
shift += 10;
case 'k':
shift += 10;
default:
break;
}
/* Check an overflow. */
if (linux_mem_size > (~0UL >> shift))
linux_mem_size = 0;
else
linux_mem_size <<= shift;
}
}
/* Specify the boot file. */
dest = grub_stpcpy ((char *) real_mode_mem + GRUB_LINUX_CL_OFFSET,
"BOOT_IMAGE=");
dest = grub_stpcpy (dest, argv[0]);
/* Copy kernel parameters. */
for (i = 1;
i < argc
&& dest + grub_strlen (argv[i]) + 1 < ((char *) real_mode_mem
+ GRUB_LINUX_CL_END_OFFSET);
i++)
{
*dest++ = ' ';
dest = grub_stpcpy (dest, argv[i]);
}
len = prot_size;
if (grub_file_read (file, (char *) GRUB_LINUX_BZIMAGE_ADDR, len) != len)
grub_error (GRUB_ERR_FILE_READ_ERROR, "Couldn't read file");
if (grub_errno == GRUB_ERR_NONE)
{
grub_loader_set (grub_linux_boot, grub_linux_unload, 1);
loaded = 1;
}
fail:
if (file)
grub_file_close (file);
if (grub_errno != GRUB_ERR_NONE)
{
grub_dl_unref (my_mod);
loaded = 0;
}
}
void
grub_rescue_cmd_initrd (int argc, char *argv[])
{
grub_file_t file = 0;
grub_ssize_t size;
grub_addr_t addr_min, addr_max;
grub_addr_t addr;
grub_efi_uintn_t mmap_size;
grub_efi_memory_descriptor_t *desc;
grub_efi_uintn_t desc_size;
struct linux_kernel_header *lh;
if (argc == 0)
{
grub_error (GRUB_ERR_BAD_ARGUMENT, "No module specified");
goto fail;
}
if (! loaded)
{
grub_error (GRUB_ERR_BAD_ARGUMENT, "You need to load the kernel first.");
goto fail;
}
file = grub_file_open (argv[0]);
if (! file)
goto fail;
size = grub_file_size (file);
initrd_pages = (page_align (size) >> 12);
lh = (struct linux_kernel_header *) real_mode_mem;
addr_max = grub_cpu_to_le32 (lh->initrd_addr_max);
if (linux_mem_size != 0 && linux_mem_size < addr_max)
addr_max = linux_mem_size;
/* Linux 2.3.xx has a bug in the memory range check, so avoid
the last page.
Linux 2.2.xx has a bug in the memory range check, which is
worse than that of Linux 2.3.xx, so avoid the last 64kb. */
addr_max -= 0x10000;
/* Usually, the compression ratio is about 50%. */
addr_min = (grub_addr_t) prot_mode_mem + ((prot_mode_pages * 3) << 12);
/* Find the highest address to put the initrd. */
mmap_size = find_mmap_size ();
if (grub_efi_get_memory_map (&mmap_size, mmap_buf, 0, &desc_size, 0) <= 0)
grub_fatal ("cannot get memory map");
addr = 0;
for (desc = mmap_buf;
desc < NEXT_MEMORY_DESCRIPTOR (mmap_buf, mmap_size);
desc = NEXT_MEMORY_DESCRIPTOR (desc, desc_size))
{
if (desc->type == GRUB_EFI_CONVENTIONAL_MEMORY
&& desc->physical_start >= addr_min
&& desc->physical_start + size < addr_max
&& desc->num_pages >= initrd_pages)
{
grub_efi_physical_address_t physical_end;
physical_end = desc->physical_start + (desc->num_pages << 12);
if (physical_end > addr_max)
physical_end = addr_max;
if (physical_end > addr)
addr = physical_end - page_align (size);
}
}
if (addr == 0)
{
grub_error (GRUB_ERR_OUT_OF_MEMORY, "no free pages available");
goto fail;
}
initrd_mem = grub_efi_allocate_pages (addr, initrd_pages);
if (! initrd_mem)
grub_fatal ("cannot allocate pages");
if (grub_file_read (file, initrd_mem, size) != size)
{
grub_error (GRUB_ERR_FILE_READ_ERROR, "Couldn't read file");
goto fail;
}
grub_printf (" [Initrd, addr=0x%x, size=0x%x]\n",
addr, size);
lh->ramdisk_image = addr;
lh->ramdisk_size = size;
lh->root_dev = 0x0100; /* XXX */
fail:
if (file)
grub_file_close (file);
}
GRUB_MOD_INIT(linux)
{
grub_rescue_register_command ("linux",
grub_rescue_cmd_linux,
"load linux");
grub_rescue_register_command ("initrd",
grub_rescue_cmd_initrd,
"load initrd");
my_mod = mod;
}
GRUB_MOD_FINI(linux)
{
grub_rescue_unregister_command ("linux");
grub_rescue_unregister_command ("initrd");
}

61
loader/i386/efi/linux_normal.c Normal file
View file

@ -0,0 +1,61 @@
/* linux_normal.c - boot linux */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2004,2005,2006 Free Software Foundation, Inc.
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <grub/machine/loader.h>
#include <grub/err.h>
#include <grub/normal.h>
#include <grub/dl.h>
static grub_err_t
grub_normal_linux_command (struct grub_arg_list *state __attribute__ ((unused)),
int argc, char **args)
{
grub_rescue_cmd_linux (argc, args);
return grub_errno;
}
static grub_err_t
grub_normal_initrd_command (struct grub_arg_list *state __attribute__ ((unused)),
int argc, char **args)
{
grub_rescue_cmd_initrd (argc, args);
return grub_errno;
}
GRUB_MOD_INIT(linux_normal)
{
(void) mod; /* To stop warning. */
grub_register_command ("linux", grub_normal_linux_command,
GRUB_COMMAND_FLAG_BOTH,
"linux FILE [ARGS...]",
"Load a linux kernel.", 0);
grub_register_command ("initrd", grub_normal_initrd_command,
GRUB_COMMAND_FLAG_BOTH,
"initrd FILE",
"Load an initrd.", 0);
}
GRUB_MOD_FINI(linux_normal)
{
grub_unregister_command ("linux");
grub_unregister_command ("initrd");
}