diff options
Diffstat (limited to 'qemu/roms/ipxe/src/arch/i386/prefix/exeprefix.S')
| -rw-r--r-- | qemu/roms/ipxe/src/arch/i386/prefix/exeprefix.S | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/qemu/roms/ipxe/src/arch/i386/prefix/exeprefix.S b/qemu/roms/ipxe/src/arch/i386/prefix/exeprefix.S deleted file mode 100644 index 5c648d51d..000000000 --- a/qemu/roms/ipxe/src/arch/i386/prefix/exeprefix.S +++ /dev/null @@ -1,161 +0,0 @@ -/* - * Copyright (C) 2011 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., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - * - * You can also choose to distribute this program under the terms of - * the Unmodified Binary Distribution Licence (as given in the file - * COPYING.UBDL), provided that you have satisfied its requirements. - * - */ - -FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ) - -/* Initial temporary stack size */ -#define EXE_STACK_SIZE 0x400 - -/* Temporary decompression area (avoid DOS high memory area) */ -#define EXE_DECOMPRESS_ADDRESS 0x110000 - -/* Fields within the Program Segment Prefix */ -#define PSP_CMDLINE_LEN 0x80 -#define PSP_CMDLINE_START 0x81 - - .text - .arch i386 - .org 0 - .code16 - .section ".prefix", "awx", @progbits - -signature: - /* "MZ" signature */ - .ascii "MZ" - -last_block: - /* Number of bytes in last block that are really used */ - .word 0 - -blocks: - /* Number of 512-byte blocks */ - .word 0 - .section ".zinfo.fixup", "a", @progbits /* Compressor fixups */ - .ascii "ADDW" - .long blocks - .long 512 - .long 0 - .previous - -num_reloc: - /* Number of relocation entries stored after the header */ - .word 0 - -header_pgh: - /* Number of paragraphs in the header */ - .word ( ( _exe_start - signature ) / 16 ) - -min_bss_pgh: - /* Minimum number of paragraphs of additional (BSS) memory */ - .word ( EXE_STACK_SIZE / 16 ) - -max_bss_pgh: - /* Maximum number of paragraphs of additional (BSS) memory */ - .word ( EXE_STACK_SIZE / 16 ) - -init_ss: - /* Initial stack segment (relative to start of executable) */ - .word -( ( _exe_start - signature ) / 16 ) - .section ".zinfo.fixup", "a", @progbits /* Compressor fixups */ - .ascii "ADDW" - .long init_ss - .long 16 - .long 0 - .previous - -init_sp: - /* Initial stack pointer */ - .word EXE_STACK_SIZE - -checksum: - /* Checksum (ignored) */ - .word 0 - -init_ip: - /* Initial instruction pointer */ - .word _exe_start - -init_cs: - /* Initial code segment (relative to start of executable) */ - .word -( ( _exe_start - signature ) / 16 ) - -reloc_table: - /* Relocation table offset */ - .word 0 - -overlay: - /* Overlay number */ - .word 0 - - .align 16, 0 - - .globl _exe_start -_exe_start: - /* Install iPXE. Use a fixed temporary decompression area to - * avoid trashing the DOS high memory area. - */ - call alloc_basemem - xorl %esi, %esi - movl $EXE_DECOMPRESS_ADDRESS, %edi - orl $0xffffffff, %ebp /* Allow arbitrary relocation */ - call install_prealloc - - /* Set up real-mode stack */ - movw %bx, %ss - movw $_estack16, %sp - - /* Jump to .text16 segment */ - pushw %ax - pushw $1f - lret - .section ".text16", "awx", @progbits -1: - /* Terminate command line with a NUL */ - movzbw PSP_CMDLINE_LEN, %si - movb $0, PSP_CMDLINE_START(%si) - - /* Calculate command line physical address */ - xorl %esi, %esi - movw %ds, %si - shll $4, %esi - addl $PSP_CMDLINE_START, %esi - - /* Set up %ds for access to .data16 */ - movw %bx, %ds - - /* Record command line address */ - movl %esi, cmdline_phys - - /* Run iPXE */ - pushl $main - pushw %cs - call prot_call - popl %ecx /* discard */ - - /* Uninstall iPXE */ - call uninstall - - /* Exit back to DOS. This is very unlikely to work */ - movw $0x4c00, %ax - int $0x21 |