GAS LISTING /tmp/ccoOyDM1.s 			page 1


   1              	# 1 "/var/www/html/boot/syslinux/memdisk/start32.S"
   1              	/* -----------------------------------------------------------------------
   1              	...
   0              	
   0              	
   2              	 *
   3              	 *   Copyright 2003-2009 H. Peter Anvin - All Rights Reserved
   4              	 *   Copyright 2009 Intel Corporation; author: H. Peter Anvin
   5              	 *
   6              	 *   This program is free software; you can redistribute it and/or modify
   7              	 *   it under the terms of the GNU General Public License as published by
   8              	 *   the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   9              	 *   Boston MA 02110-1301, USA; either version 2 of the License, or
  10              	 *   (at your option) any later version; incorporated herein by reference.
  11              	 *
  12              	 * ----------------------------------------------------------------------- */
  13              	
  14              	/*
  15              	 * Simple stub to get us to the right point in the 32-bit code;
  16              	 * this module must be linked first
  17              	 */
  18              	
  19              		.section ".init", "ax"
  20              		.globl _start
  21              	_start:
  22              		/* Zero the bss */
  23 0000 FC       		cld
  24 0001 BF000000 		movl	$__bss_start, %edi
  24      00
  25 0006 B9000000 		movl	$__bss_end, %ecx
  25      00
  26 000b 29F9     		subl	%edi, %ecx
  27 000d 31C0     		xorl	%eax, %eax
  28 000f C1E902   		shrl	$2, %ecx
  29 0012 F3AB     		rep ; stosl
  30              	
  31              		/* Set up the protected-mode IDT and the interrupt jump buffers */
  32 0014 BF000000 		movl	$idt, %edi
  32      00
  33 0019 B8000800 		movl	$ijb, %eax
  33      00
  34 001e BB000000 		movl	$0xee000000, %ebx	/* Interrupt gate */
  34      EE
  35 0023 668CCB   		movw	%cs, %bx		/* Target segment */
  36              	
  37              		/* Make the IDT */
  38 0026 B9000100 		movl	$256, %ecx
  38      00
  39              	1:
  40 002b AB       		stosl
  41 002c AB       		stosl
  42 002d 895FFA   		movl	%ebx, -6(%edi)
  43 0030 83C008   		addl	$8, %eax
  44 0033 E2F6     		loop	1b
  45              	
  46              		/*
  47              		 * Each entry in the interrupt jump buffer contains the following
GAS LISTING /tmp/ccoOyDM1.s 			page 2


  48              		 * instructions:
  49              		 *
  50              		 * 60		pushal
  51              		 * b0xx		movb $xx, %al		# interrupt number
  52              		 * e9xxxxxxxx	jmp handle_interrupt
  53              		 */
  54 0035 B860B000 		movl	$0xe900b060, %eax
  54      E9
  55 003a B9000100 		movl	$256, %ecx
  55      00
  56              	1:
  57 003f 8907     		movl	%eax, (%edi)
  58 0041 05000001 		addl	$(1 << 16), %eax
  58      00
  59 0046 BAFEFFFF 		movl	$handle_interrupt-8, %edx
  59      FF
  60 004b 29FA     		subl	%edi, %edx
  61 004d 895704   		movl	%edx, 4(%edi)
  62 0050 83C708   		addl	$8, %edi
  63 0053 E2EA     		loop	1b
  64              	
  65              	#if __SIZEOF_POINTER__ == 4
  66 0055 0F011D00 		lidtl	idt_ptr
  66      000000
  67              	#elif __SIZEOF_POINTER__ == 8
  68              		lidt	idt_ptr
  69              	#else
  70              	#error "unsupported architecture"
  71              	#endif
  72              		
  73              		/* Save arguments, switch stacks */
  74 005c 89E0     		movl	%esp, %eax		/* Pointer to arguments */
  75 005e BC001001 		movl	$__stack_end, %esp
  75      00
  76              		
  77 0063 E8FCFFFF 		call	setup
  77      FF
  78 0068 FF250000 		jmp	*(rm_args)		/* First argument is return */
  78      0000
  79              	
  80              		.section ".text","ax"
  81              		.globl	intcall
  82              		.type	intcall, @function
  83              	intcall:
  84 0000 FF250400 		jmp	*(rm_args+1*4)		/* Intcall is argument 1 */
  84      0000
  85              		.size	intcall, .-intcall
  86              	
  87              		.type	handle_interrupt, @function
  88              	handle_interrupt:
  89 0006 FF251000 		jmp	*(rm_args+4*4)		/* Interrupt pointer is argument 4 */
  89      0000
  90              		.size	handle_interrupt, .-handle_interrupt
  91              	
  92              		.section ".rodata","a"
  93              	idt_ptr:
  94 0000 FF07     		.word	8*256-1
GAS LISTING /tmp/ccoOyDM1.s 			page 3


  95 0002 00000000 		.long	idt
  96 0006 0000     		.word	0
  97              	
  98              		.section ".bss.large","aw"
  99              		.balign 2048
 100              	idt:
 101 0000 00000000 		.space	8*256
 101      00000000 
 101      00000000 
 101      00000000 
 101      00000000 
 102              	ijb:
 103 0800 00000000 		.space	8*256
 103      00000000 
 103      00000000 
 103      00000000 
 103      00000000 
 104              	
 105              	__stack:
 106 1000 00000000 		.space	65536
 106      00000000 
 106      00000000 
 106      00000000 
 106      00000000 
 107              	__stack_end:
GAS LISTING /tmp/ccoOyDM1.s 			page 4


DEFINED SYMBOLS
/var/www/html/boot/syslinux/memdisk/start32.S:21     .init:0000000000000000 _start
/var/www/html/boot/syslinux/memdisk/start32.S:100    .bss.large:0000000000000000 idt
/var/www/html/boot/syslinux/memdisk/start32.S:102    .bss.large:0000000000000800 ijb
/var/www/html/boot/syslinux/memdisk/start32.S:88     .text:0000000000000006 handle_interrupt
/var/www/html/boot/syslinux/memdisk/start32.S:93     .rodata:0000000000000000 idt_ptr
/var/www/html/boot/syslinux/memdisk/start32.S:107    .bss.large:0000000000011000 __stack_end
/var/www/html/boot/syslinux/memdisk/start32.S:83     .text:0000000000000000 intcall
/var/www/html/boot/syslinux/memdisk/start32.S:105    .bss.large:0000000000001000 __stack

UNDEFINED SYMBOLS
__bss_start
__bss_end
setup
rm_args