1 files changed, 0 insertions, 466 deletions
diff --git a/gpxe/src/arch/i386/image/multiboot.c b/gpxe/src/arch/i386/image/multiboot.c
deleted file mode 100644
index 5b620956..00000000
--- a/gpxe/src/arch/i386/image/multiboot.c
+++ /dev/null
@@ -1,466 +0,0 @@
-/*
- * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
- *
- * 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 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.
- */
-
-FILE_LICENCE ( GPL2_OR_LATER );
-
-/**
- * @file
- *
- * Multiboot image format
- *
- */
-
-#include <stdio.h>
-#include <errno.h>
-#include <assert.h>
-#include <realmode.h>
-#include <multiboot.h>
-#include <gpxe/uaccess.h>
-#include <gpxe/image.h>
-#include <gpxe/segment.h>
-#include <gpxe/memmap.h>
-#include <gpxe/elf.h>
-#include <gpxe/init.h>
-#include <gpxe/features.h>
-
-FEATURE ( FEATURE_IMAGE, "Multiboot", DHCP_EB_FEATURE_MULTIBOOT, 1 );
-
-struct image_type multiboot_image_type __image_type ( PROBE_MULTIBOOT );
-
-/**
- * Maximum number of modules we will allow for
- *
- * If this has bitten you: sorry.  I did have a perfect scheme with a
- * dynamically allocated list of modules on the protected-mode stack,
- * but it was incompatible with some broken OSes that can only access
- * low memory at boot time (even though we kindly set up 4GB flat
- * physical addressing as per the multiboot specification.
- *
- */
-#define MAX_MODULES 8
-
-/**
- * Maximum combined length of command lines
- *
- * Again; sorry.  Some broken OSes zero out any non-base memory that
- * isn't part of the loaded module set, so we can't just use
- * virt_to_phys(cmdline) to point to the command lines, even though
- * this would comply with the Multiboot spec.
- */
-#define MB_MAX_CMDLINE 512
-
-/** Multiboot flags that we support */
-#define MB_SUPPORTED_FLAGS ( MB_FLAG_PGALIGN | MB_FLAG_MEMMAP | \
-			     MB_FLAG_VIDMODE | MB_FLAG_RAW )
-
-/** Compulsory feature multiboot flags */
-#define MB_COMPULSORY_FLAGS 0x0000ffff
-
-/** Optional feature multiboot flags */
-#define MB_OPTIONAL_FLAGS 0xffff0000
-
-/**
- * Multiboot flags that we don't support
- *
- * We only care about the compulsory feature flags (bits 0-15); we are
- * allowed to ignore the optional feature flags.
- */
-#define MB_UNSUPPORTED_FLAGS ( MB_COMPULSORY_FLAGS & ~MB_SUPPORTED_FLAGS )
-
-/** A multiboot header descriptor */
-struct multiboot_header_info {
-	/** The actual multiboot header */
-	struct multiboot_header mb;
-	/** Offset of header within the multiboot image */
-	size_t offset;
-};
-
-/** Multiboot module command lines */
-static char __bss16_array ( mb_cmdlines, [MB_MAX_CMDLINE] );
-#define mb_cmdlines __use_data16 ( mb_cmdlines )
-
-/** Offset within module command lines */
-static unsigned int mb_cmdline_offset;
-
-/**
- * Build multiboot memory map
- *
- * @v image		Multiboot image
- * @v mbinfo		Multiboot information structure
- * @v mbmemmap		Multiboot memory map
- * @v limit		Maxmimum number of memory map entries
- */
-static void multiboot_build_memmap ( struct image *image,
-				     struct multiboot_info *mbinfo,
-				     struct multiboot_memory_map *mbmemmap,
-				     unsigned int limit ) {
-	struct memory_map memmap;
-	unsigned int i;
-
-	/* Get memory map */
-	get_memmap ( &memmap );
-
-	/* Translate into multiboot format */
-	memset ( mbmemmap, 0, sizeof ( *mbmemmap ) );
-	for ( i = 0 ; i < memmap.count ; i++ ) {
-		if ( i >= limit ) {
-			DBGC ( image, "MULTIBOOT %p limit of %d memmap "
-			       "entries reached\n", image, limit );
-			break;
-		}
-		mbmemmap[i].size = ( sizeof ( mbmemmap[i] ) -
-				     sizeof ( mbmemmap[i].size ) );
-		mbmemmap[i].base_addr = memmap.regions[i].start;
-		mbmemmap[i].length = ( memmap.regions[i].end -
-				       memmap.regions[i].start );
-		mbmemmap[i].type = MBMEM_RAM;
-		mbinfo->mmap_length += sizeof ( mbmemmap[i] );
-		if ( memmap.regions[i].start == 0 )
-			mbinfo->mem_lower = ( memmap.regions[i].end / 1024 );
-		if ( memmap.regions[i].start == 0x100000 )
-			mbinfo->mem_upper = ( ( memmap.regions[i].end -
-						0x100000 ) / 1024 );
-	}
-}
-
-/**
- * Add command line in base memory
- *
- * @v imgname		Image name
- * @v cmdline		Command line
- * @ret physaddr	Physical address of command line
- */
-physaddr_t multiboot_add_cmdline ( const char *imgname, const char *cmdline ) {
-	char *mb_cmdline;
-
-	if ( ! cmdline )
-		cmdline = "";
-
-	/* Copy command line to base memory buffer */
-	mb_cmdline = ( mb_cmdlines + mb_cmdline_offset );
-	mb_cmdline_offset +=
-		( snprintf ( mb_cmdline,
-			     ( sizeof ( mb_cmdlines ) - mb_cmdline_offset ),
-			     "%s %s", imgname, cmdline ) + 1 );
-
-	/* Truncate to terminating NUL in buffer if necessary */
-	if ( mb_cmdline_offset > sizeof ( mb_cmdlines ) )
-		mb_cmdline_offset = ( sizeof ( mb_cmdlines ) - 1 );
-
-	return virt_to_phys ( mb_cmdline );
-}
-
-/**
- * Build multiboot module list
- *
- * @v image		Multiboot image
- * @v modules		Module list to fill, or NULL
- * @ret count		Number of modules
- */
-static unsigned int
-multiboot_build_module_list ( struct image *image,
-			      struct multiboot_module *modules,
-			      unsigned int limit ) {
-	struct image *module_image;
-	struct multiboot_module *module;
-	unsigned int count = 0;
-	unsigned int insert;
-	physaddr_t start;
-	physaddr_t end;
-	unsigned int i;
-
-	/* Add each image as a multiboot module */
-	for_each_image ( module_image ) {
-
-		if ( count >= limit ) {
-			DBGC ( image, "MULTIBOOT %p limit of %d modules "
-			       "reached\n", image, limit );
-			break;
-		}
-
-		/* Do not include kernel image itself as a module */
-		if ( module_image == image )
-			continue;
-
-		/* At least some OSes expect the multiboot modules to
-		 * be in ascending order, so we have to support it.
-		 */
-		start = user_to_phys ( module_image->data, 0 );
-		end = user_to_phys ( module_image->data, module_image->len );
-		for ( insert = 0 ; insert < count ; insert++ ) {
-			if ( start < modules[insert].mod_start )
-				break;
-		}
-		module = &modules[insert];
-		memmove ( ( module + 1 ), module,
-			  ( ( count - insert ) * sizeof ( *module ) ) );
-		module->mod_start = start;
-		module->mod_end = end;
-		module->string = multiboot_add_cmdline ( module_image->name,
-						       module_image->cmdline );
-		module->reserved = 0;
-		
-		/* We promise to page-align modules */
-		assert ( ( module->mod_start & 0xfff ) == 0 );
-
-		count++;
-	}
-
-	/* Dump module configuration */
-	for ( i = 0 ; i < count ; i++ ) {
-		DBGC ( image, "MULTIBOOT %p module %d is [%x,%x)\n",
-		       image, i, modules[i].mod_start,
-		       modules[i].mod_end );
-	}
-
-	return count;
-}
-
-/**
- * The multiboot information structure
- *
- * Kept in base memory because some OSes won't find it elsewhere,
- * along with the other structures belonging to the Multiboot
- * information table.
- */
-static struct multiboot_info __bss16 ( mbinfo );
-#define mbinfo __use_data16 ( mbinfo )
-
-/** The multiboot bootloader name */
-static char __data16_array ( mb_bootloader_name, [] ) = "gPXE " VERSION;
-#define mb_bootloader_name __use_data16 ( mb_bootloader_name )
-
-/** The multiboot memory map */
-static struct multiboot_memory_map
-	__bss16_array ( mbmemmap, [MAX_MEMORY_REGIONS] );
-#define mbmemmap __use_data16 ( mbmemmap )
-
-/** The multiboot module list */
-static struct multiboot_module __bss16_array ( mbmodules, [MAX_MODULES] );
-#define mbmodules __use_data16 ( mbmodules )
-
-/**
- * Execute multiboot image
- *
- * @v image		Multiboot image
- * @ret rc		Return status code
- */
-static int multiboot_exec ( struct image *image ) {
-	physaddr_t entry = image->priv.phys;
-
-	/* Populate multiboot information structure */
-	memset ( &mbinfo, 0, sizeof ( mbinfo ) );
-	mbinfo.flags = ( MBI_FLAG_LOADER | MBI_FLAG_MEM | MBI_FLAG_MMAP |
-			 MBI_FLAG_CMDLINE | MBI_FLAG_MODS );
-	mb_cmdline_offset = 0;
-	mbinfo.cmdline = multiboot_add_cmdline ( image->name, image->cmdline );
-	mbinfo.mods_count = multiboot_build_module_list ( image, mbmodules,
-				( sizeof(mbmodules) / sizeof(mbmodules[0]) ) );
-	mbinfo.mods_addr = virt_to_phys ( mbmodules );
-	mbinfo.mmap_addr = virt_to_phys ( mbmemmap );
-	mbinfo.boot_loader_name = virt_to_phys ( mb_bootloader_name );
-
-	/* Multiboot images may not return and have no callback
-	 * interface, so shut everything down prior to booting the OS.
-	 */
-	shutdown ( SHUTDOWN_BOOT );
-
-	/* Build memory map after unhiding bootloader memory regions as part of
-	 * shutting everything down.
-	 */
-	multiboot_build_memmap ( image, &mbinfo, mbmemmap,
-				 ( sizeof(mbmemmap) / sizeof(mbmemmap[0]) ) );
-
-	/* Jump to OS with flat physical addressing */
-	DBGC ( image, "MULTIBOOT %p starting execution at %lx\n",
-	       image, entry );
-	__asm__ __volatile__ ( PHYS_CODE ( "pushl %%ebp\n\t"
-					   "call *%%edi\n\t"
-					   "popl %%ebp\n\t" )
-			       : : "a" ( MULTIBOOT_BOOTLOADER_MAGIC ),
-			           "b" ( virt_to_phys ( &mbinfo ) ),
-			           "D" ( entry )
-			       : "ecx", "edx", "esi", "memory" );
-
-	DBGC ( image, "MULTIBOOT %p returned\n", image );
-
-	/* It isn't safe to continue after calling shutdown() */
-	while ( 1 ) {}
-
-	return -ECANCELED;  /* -EIMPOSSIBLE, anyone? */
-}
-
-/**
- * Find multiboot header
- *
- * @v image		Multiboot file
- * @v hdr		Multiboot header descriptor to fill in
- * @ret rc		Return status code
- */
-static int multiboot_find_header ( struct image *image,
-				   struct multiboot_header_info *hdr ) {
-	uint32_t buf[64];
-	size_t offset;
-	unsigned int buf_idx;
-	uint32_t checksum;
-
-	/* Scan through first 8kB of image file 256 bytes at a time.
-	 * (Use the buffering to avoid the overhead of a
-	 * copy_from_user() for every dword.)
-	 */
-	for ( offset = 0 ; offset < 8192 ; offset += sizeof ( buf[0] ) ) {
-		/* Check for end of image */
-		if ( offset > image->len )
-			break;
-		/* Refill buffer if applicable */
-		buf_idx = ( ( offset % sizeof ( buf ) ) / sizeof ( buf[0] ) );
-		if ( buf_idx == 0 ) {
-			copy_from_user ( buf, image->data, offset,
-					 sizeof ( buf ) );
-		}
-		/* Check signature */
-		if ( buf[buf_idx] != MULTIBOOT_HEADER_MAGIC )
-			continue;
-		/* Copy header and verify checksum */
-		copy_from_user ( &hdr->mb, image->data, offset,
-				 sizeof ( hdr->mb ) );
-		checksum = ( hdr->mb.magic + hdr->mb.flags +
-			     hdr->mb.checksum );
-		if ( checksum != 0 )
-			continue;
-		/* Record offset of multiboot header and return */
-		hdr->offset = offset;
-		return 0;
-	}
-
-	/* No multiboot header found */
-	return -ENOEXEC;
-}
-
-/**
- * Load raw multiboot image into memory
- *
- * @v image		Multiboot file
- * @v hdr		Multiboot header descriptor
- * @ret rc		Return status code
- */
-static int multiboot_load_raw ( struct image *image,
-				struct multiboot_header_info *hdr ) {
-	size_t offset;
-	size_t filesz;
-	size_t memsz;
-	userptr_t buffer;
-	int rc;
-
-	/* Sanity check */
-	if ( ! ( hdr->mb.flags & MB_FLAG_RAW ) ) {
-		DBGC ( image, "MULTIBOOT %p is not flagged as a raw image\n",
-		       image );
-		return -EINVAL;
-	}
-
-	/* Verify and prepare segment */
-	offset = ( hdr->offset - hdr->mb.header_addr + hdr->mb.load_addr );
-	filesz = ( hdr->mb.load_end_addr ?
-		   ( hdr->mb.load_end_addr - hdr->mb.load_addr ) :
-		   ( image->len - offset ) );
-	memsz = ( hdr->mb.bss_end_addr ?
-		  ( hdr->mb.bss_end_addr - hdr->mb.load_addr ) : filesz );
-	buffer = phys_to_user ( hdr->mb.load_addr );
-	if ( ( rc = prep_segment ( buffer, filesz, memsz ) ) != 0 ) {
-		DBGC ( image, "MULTIBOOT %p could not prepare segment: %s\n",
-		       image, strerror ( rc ) );
-		return rc;
-	}
-
-	/* Copy image to segment */
-	memcpy_user ( buffer, 0, image->data, offset, filesz );
-
-	/* Record execution entry point in image private data field */
-	image->priv.phys = hdr->mb.entry_addr;
-
-	return 0;
-}
-
-/**
- * Load ELF multiboot image into memory
- *
- * @v image		Multiboot file
- * @ret rc		Return status code
- */
-static int multiboot_load_elf ( struct image *image ) {
-	int rc;
-
-	/* Load ELF image*/
-	if ( ( rc = elf_load ( image ) ) != 0 ) {
-		DBGC ( image, "MULTIBOOT %p ELF image failed to load: %s\n",
-		       image, strerror ( rc ) );
-		return rc;
-	}
-
-	return 0;
-}
-
-/**
- * Load multiboot image into memory
- *
- * @v image		Multiboot file
- * @ret rc		Return status code
- */
-static int multiboot_load ( struct image *image ) {
-	struct multiboot_header_info hdr;
-	int rc;
-
-	/* Locate multiboot header, if present */
-	if ( ( rc = multiboot_find_header ( image, &hdr ) ) != 0 ) {
-		DBGC ( image, "MULTIBOOT %p has no multiboot header\n",
-		       image );
-		return rc;
-	}
-	DBGC ( image, "MULTIBOOT %p found header with flags %08x\n",
-	       image, hdr.mb.flags );
-
-	/* This is a multiboot image, valid or otherwise */
-	if ( ! image->type )
-		image->type = &multiboot_image_type;
-
-	/* Abort if we detect flags that we cannot support */
-	if ( hdr.mb.flags & MB_UNSUPPORTED_FLAGS ) {
-		DBGC ( image, "MULTIBOOT %p flags %08x not supported\n",
-		       image, ( hdr.mb.flags & MB_UNSUPPORTED_FLAGS ) );
-		return -ENOTSUP;
-	}
-
-	/* There is technically a bit MB_FLAG_RAW to indicate whether
-	 * this is an ELF or a raw image.  In practice, grub will use
-	 * the ELF header if present, and Solaris relies on this
-	 * behaviour.
-	 */
-	if ( ( ( rc = multiboot_load_elf ( image ) ) != 0 ) &&
-	     ( ( rc = multiboot_load_raw ( image, &hdr ) ) != 0 ) )
-		return rc;
-
-	return 0;
-}
-
-/** Multiboot image type */
-struct image_type multiboot_image_type __image_type ( PROBE_MULTIBOOT ) = {
-	.name = "Multiboot",
-	.load = multiboot_load,
-	.exec = multiboot_exec,
-};