62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
/** @file
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*
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* PXE exit hook
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*
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*/
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/*
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* Copyright (C) 2010 Shao Miller <shao.miller@yrdsb.edu.on.ca>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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FILE_LICENCE ( GPL2_OR_LATER );
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#include <stdint.h>
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#include <realmode.h>
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#include <pxe.h>
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/** PXE exit hook */
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extern segoff_t __data16 ( pxe_exit_hook );
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#define pxe_exit_hook __use_data16 ( pxe_exit_hook )
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/**
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* FILE EXIT HOOK
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*
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* @v file_exit_hook Pointer to a struct
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* s_PXENV_FILE_EXIT_HOOK
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* @v s_PXENV_FILE_EXIT_HOOK::Hook SEG16:OFF16 to jump to
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* @ret #PXENV_EXIT_SUCCESS Successfully set hook
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* @ret #PXENV_EXIT_FAILURE We're not an NBP build
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* @ret s_PXENV_FILE_EXIT_HOOK::Status PXE status code
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*
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*/
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static PXENV_EXIT_t
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pxenv_file_exit_hook ( struct s_PXENV_FILE_EXIT_HOOK *file_exit_hook ) {
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DBG ( "PXENV_FILE_EXIT_HOOK" );
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/* We'll jump to the specified SEG16:OFF16 during exit */
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pxe_exit_hook.segment = file_exit_hook->Hook.segment;
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pxe_exit_hook.offset = file_exit_hook->Hook.offset;
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file_exit_hook->Status = PXENV_STATUS_SUCCESS;
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return PXENV_EXIT_SUCCESS;
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}
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/** PXE file API */
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struct pxe_api_call pxe_file_api_exit_hook __pxe_api_call =
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PXE_API_CALL ( PXENV_FILE_EXIT_HOOK, pxenv_file_exit_hook,
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struct s_PXENV_FILE_EXIT_HOOK );
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