sysadmin/ipxe
1
0
Fork 0
mirror of https://github.com/ipxe/ipxe synced 2025-12-20 20:10:18 +03:00
Code Issues Packages Projects Releases Wiki Activity

[efi] Add EFI image format and basic runtime environment

Browse Source 
We have EFI APIs for CPU I/O, PCI I/O, timers, console I/O, user
access and user memory allocation.

EFI executables are created using the vanilla GNU toolchain, with the
EXE header handcrafted in assembly and relocations generated by a
custom efilink utility.
This commit is contained in:
Michael Brown
2008-10-12 01:55:55 +01:00
parent 54c024e0af
commit 81d92c6d34
40 changed files with 4781 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

106
src/image/efi_image.c Normal file
View File

@@ -0,0 +1,106 @@
/*
* Copyright (C) 2008 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.
*/
#include <errno.h>
#include <gpxe/efi/efi.h>
#include <gpxe/image.h>
#include <gpxe/features.h>
FEATURE ( FEATURE_IMAGE, "EFI", DHCP_EB_FEATURE_EFI, 1 );
struct image_type efi_image_type __image_type ( PROBE_NORMAL );
/**
* Execute EFI image
*
* @v image EFI image
* @ret rc Return status code
*/
static int efi_image_exec ( struct image *image ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
EFI_HANDLE handle;
UINTN exit_data_size;
CHAR16 *exit_data;
EFI_STATUS efirc;
/* Attempt loading image */
if ( ( efirc = bs->LoadImage ( FALSE, efi_image_handle, NULL,
user_to_virt ( image->data, 0 ),
image->len, &handle ) ) != 0 ) {
/* Not an EFI image */
DBGC ( image, "EFIIMAGE %p could not load: %lx\n",
image, efirc );
return -ENOEXEC;
}
/* Start the image */
if ( ( efirc = bs->StartImage ( handle, &exit_data_size,
&exit_data ) ) != 0 ) {
DBGC ( image, "EFIIMAGE %p returned with status %lx\n",
image, efirc );
goto done;
}
done:
/* Unload the image. We can't leave it loaded, because we
* have no "unload" operation.
*/
bs->UnloadImage ( handle );
return EFIRC_TO_RC ( efirc );
}
/**
* Load EFI image into memory
*
* @v image EFI file
* @ret rc Return status code
*/
static int efi_image_load ( struct image *image ) {
EFI_BOOT_SERVICES *bs = efi_systab->BootServices;
EFI_HANDLE handle;
EFI_STATUS efirc;
/* Attempt loading image */
if ( ( efirc = bs->LoadImage ( FALSE, efi_image_handle, NULL,
user_to_virt ( image->data, 0 ),
image->len, &handle ) ) != 0 ) {
/* Not an EFI image */
DBGC ( image, "EFIIMAGE %p could not load: %lx\n",
image, efirc );
return -ENOEXEC;
}
/* This is an EFI image */
if ( ! image->type )
image->type = &efi_image_type;
/* Unload the image. We can't leave it loaded, because we
* have no "unload" operation.
*/
bs->UnloadImage ( handle );
return 0;
}
/** EFI image type */
struct image_type efi_image_type __image_type ( PROBE_NORMAL ) = {
.name = "EFI",
.load = efi_image_load,
.exec = efi_image_exec,
};