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2010-01-07 Robert Millan <rmh.grub@aybabtu.com>

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Reset Multiboot 2 support.  New loader implements the draft in
	/branches/multiboot2 and shares as much code as possible with the
	production Multiboot 1 implementation.
	
	* loader/ieee1275/multiboot2.c: Remove file.  Update all users.
	* loader/multiboot2.c: Likewise.
	* loader/i386/multiboot_helper.S: Likewise.
	* include/multiboot2.h: Replace with latest version from the draft
	in /branches/multiboot2.
	
	* conf/i386-coreboot.rmk (multiboot_mod_SOURCES): Remove
	`loader/i386/multiboot_helper.S', `loader/i386/pc/multiboot2.c'
	and `loader/multiboot2.c'.
	(pkglib_MODULES): Add `multiboot2.mod'.
	(multiboot2_mod_SOURCES): New variable.
	(multiboot2_mod_LDFLAGS): Likewise.
	(multiboot2_mod_CFLAGS): Likewise.  Define `GRUB_USE_MULTIBOOT2'.
	
	* conf/i386-pc.rmk: Likewise.
	
	* conf/powerpc-ieee1275.rmk (pkglib_MODULES): Remove `multiboot.mod'.
	(multiboot_mod_SOURCES): Remove variable.
	(multiboot_mod_LDFLAGS): Likewise.
	(multiboot_mod_CFLAGS): Likewise.
	
	* include/grub/multiboot.h [GRUB_USE_MULTIBOOT2]: Include
	`<multiboot2.h>' instead of `<multiboot.h>'.
	[GRUB_USE_MULTIBOOT2] (MULTIBOOT_BOOTLOADER_MAGIC)
	(MULTIBOOT_HEADER_MAGIC): New macros.
	
	* loader/multiboot_loader.c (module_version_status): Remove variable.
	(find_multi_boot2_header): Remove function.
	(grub_cmd_multiboot_loader): Remove Multiboot 2 / Multiboot 1 selection
	logic.  Always check for the Multiboot version we're compiling for.
	(grub_cmd_module_loader): Likewise.
	[GRUB_USE_MULTIBOOT2] (GRUB_MOD_INIT(multiboot)): Register `multiboot2'
	command instead of `multiboot'.
This commit is contained in:
Robert Millan 2010-01-07 21:05:25 +00:00
parent 5d2c52b8ca
commit bc8b32b3ec
10 changed files with 266 additions and 823 deletions
Download patch file Download diff file Expand all files Collapse all files

91
loader/multiboot_loader.c
View file

@ -1,7 +1,7 @@
/* multiboot_loader.c - boot multiboot 1 or 2 OS image */
/* multiboot_loader.c - boot multiboot kernel image */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2007,2008,2009 Free Software Foundation, Inc.
* Copyright (C) 2007,2008,2009,2010 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
@ -18,8 +18,6 @@
*/
#include <grub/multiboot.h>
#include <grub/multiboot2.h>
#include <multiboot2.h>
#include <grub/elf.h>
#include <grub/file.h>
#include <grub/err.h>
@ -31,15 +29,6 @@
grub_dl_t my_mod;
/* This tracks which version of multiboot to use when using
* the module command. By default use multiboot version 1.
* values:
* 1 - Multiboot version 1
* 2 - Multiboot version 2
*/
static unsigned int module_version_status = 1;
static int
find_multi_boot1_header (grub_file_t file)
{
@ -69,34 +58,6 @@ find_multi_boot1_header (grub_file_t file)
return found_status;
}
static int
find_multi_boot2_header (grub_file_t file)
{
struct multiboot_header *header;
char buffer[MULTIBOOT_SEARCH];
int found_status = 0;
grub_ssize_t len;
len = grub_file_read (file, buffer, MULTIBOOT_SEARCH);
if (len < 32)
return found_status;
/* Look for the multiboot header in the buffer. The header should
be at least 8 bytes and aligned on a 8-byte boundary. */
for (header = (struct multiboot_header *) buffer;
((char *) header <= buffer + len - 8) || (header = 0);
header = (struct multiboot_header *) ((char *) header + 8))
{
if (header->magic == MULTIBOOT2_HEADER_MAGIC)
{
found_status = 1;
break;
}
}
return found_status;
}
static grub_err_t
grub_cmd_multiboot_loader (grub_command_t cmd __attribute__ ((unused)),
int argc, char *argv[])
@ -122,8 +83,6 @@ grub_cmd_multiboot_loader (grub_command_t cmd __attribute__ ((unused)),
/* find which header is in the file */
if (find_multi_boot1_header (file))
header_multi_ver_found = 1;
else if (find_multi_boot2_header (file))
header_multi_ver_found = 2;
else
{
grub_error (GRUB_ERR_BAD_OS, "multiboot header not found");
@ -136,25 +95,9 @@ grub_cmd_multiboot_loader (grub_command_t cmd __attribute__ ((unused)),
/* Launch multi boot with header */
/* XXX Find a better way to identify this.
This is for i386-pc */
#if defined(GRUB_MACHINE_PCBIOS) || defined(GRUB_MACHINE_COREBOOT) || \
defined(GRUB_MACHINE_QEMU)
if (header_multi_ver_found == 1)
{
grub_dprintf ("multiboot_loader",
"Launching multiboot 1 grub_multiboot() function\n");
grub_multiboot (argc, argv);
module_version_status = 1;
}
#endif
if (header_multi_ver_found == 0 || header_multi_ver_found == 2)
{
grub_dprintf ("multiboot_loader",
"Launching multiboot 2 grub_multiboot2() function\n");
grub_multiboot2 (argc, argv);
module_version_status = 2;
}
grub_dprintf ("multiboot_loader",
"Launching multiboot 1 grub_multiboot() function\n");
grub_multiboot (argc, argv);
return grub_errno;
@ -172,21 +115,9 @@ grub_cmd_module_loader (grub_command_t cmd __attribute__ ((unused)),
int argc, char *argv[])
{
#if defined(GRUB_MACHINE_PCBIOS) || defined(GRUB_MACHINE_COREBOOT) || \
defined(GRUB_MACHINE_QEMU)
if (module_version_status == 1)
{
grub_dprintf("multiboot_loader",
"Launching multiboot 1 grub_module() function\n");
grub_module (argc, argv);
}
#endif
if (module_version_status == 2)
{
grub_dprintf("multiboot_loader",
"Launching multiboot 2 grub_module2() function\n");
grub_module2 (argc, argv);
}
grub_dprintf("multiboot_loader",
"Launching multiboot 1 grub_module() function\n");
grub_module (argc, argv);
return grub_errno;
}
@ -196,8 +127,14 @@ static grub_command_t cmd_multiboot, cmd_module;
GRUB_MOD_INIT(multiboot)
{
cmd_multiboot =
#ifdef GRUB_USE_MULTIBOOT2
grub_register_command ("multiboot2", grub_cmd_multiboot_loader,
0, "Load a multiboot 2 kernel.");
#else
grub_register_command ("multiboot", grub_cmd_multiboot_loader,
0, "Load a multiboot kernel.");
#endif
cmd_module =
grub_register_command ("module", grub_cmd_module_loader,
0, "Load a multiboot module.");