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ipxe/src/arch/x86/prefix/nbiprefix.S

nbiprefix.S 1.7KB
文件歷史 原始文件

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  1. FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL )

  2. 

  3. 	.text

  4. 	.arch i386

  5. 	.code16

  6. 	.section ".prefix", "ax", @progbits

  7. 	.org 0

  8. 

  9. nbi_header:

  10. 	

  11. /*****************************************************************************

  12.  * NBI file header

  13.  *****************************************************************************

  14.  */

  15. file_header:

  16. 	.long	0x1b031336	/* Signature */

  17. 	.byte	0x04		/* 16 bytes header, no vendor info */

  18. 	.byte	0

  19. 	.byte	0

  20. 	.byte	0		/* No flags */

  21. 	.word	0x0000, 0x07c0	/* Load header to 0x07c0:0x0000 */

  22. 	.word	_nbi_start, 0x07c0	/* Start execution at 0x07c0:entry */

  23. 	.size	file_header, . - file_header

  24. 

  25. /*****************************************************************************

  26.  * NBI segment header

  27.  *****************************************************************************

  28.  */

  29. segment_header:

  30. 	.byte	0x04		/* 16 bytes header, no vendor info */

  31. 	.byte	0

  32. 	.byte	0

  33. 	.byte	0x04		/* Last segment */

  34. 	.long	0x00007e00

  35. imglen:	.long	-512

  36. memlen:	.long	-512

  37. 	.size	segment_header, . - segment_header

  38. 

  39. 	.section ".zinfo.fixup", "a", @progbits	/* Compressor fixups */

  40. 	.ascii	"ADDL"

  41. 	.long	imglen

  42. 	.long	1

  43. 	.long	0

  44. 	.ascii	"ADDL"

  45. 	.long	memlen

  46. 	.long	1

  47. 	.long	0

  48. 	.previous

  49. 

  50. /*****************************************************************************

  51.  * NBI entry point

  52.  *****************************************************************************

  53.  */

  54. 	.globl	_nbi_start

  55. _nbi_start:

  56. 	/* Install iPXE */

  57. 	call	install

  58. 

  59. 	/* Set up real-mode stack */

  60. 	movw	%bx, %ss

  61. 	movw	$_estack16, %sp

  62. 

  63. 	/* Jump to .text16 segment */

  64. 	pushw	%ax

  65. 	pushw	$1f

  66. 	lret

  67. 	.section ".text16", "awx", @progbits

  68. 1:

  69. 	pushl	$main

  70. 	call	prot_call

  71. 

  72. 	/* Uninstall iPXE */

  73. 	call	uninstall

  74. 

  75. 	/* Reboot system */

  76. 	int $0x19

  77. 

  78. 	.previous

  79. 	.size	_nbi_start, . - _nbi_start

  80. 

  81. nbi_header_end:

  82. 	.org 512