mirror of https://github.com/ipxe/ipxe.git
55 lines
847 B
ArmAsm
55 lines
847 B
ArmAsm
/*
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* Raw binary prefix
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*
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* Assumes that entire image is already loaded as a contiguous block
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* on a paragraph boundary and entered in real mode.
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*
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*/
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL )
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.section ".note.GNU-stack", "", @progbits
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.text
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.arch i386
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.org 0
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.code16
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#include <librm.h>
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.section ".prefix", "ax", @progbits
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.globl _raw_start
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_raw_start:
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/* Adjust %cs so that %cs:0000 is the start of the image */
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movw %cs, %ax
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call 1f
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1: popw %bx
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subw $1b, %bx
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shrw $4, %bx
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addw %bx, %ax
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pushw %ax
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pushw $2f
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lret
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2:
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/* Install iPXE */
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call install
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/* Set up real-mode stack */
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movw %bx, %ss
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movw $_estack16, %sp
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/* Jump to .text16 segment */
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pushw %ax
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pushw $1f
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lret
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.section ".text16", "awx", @progbits
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1:
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/* Run iPXE */
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virtcall main
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/* Uninstall iPXE */
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call uninstall
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/* Boot next device */
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int $0x18
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