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Last change
on this file was
e16e8f2,
checked in by Edwin Eefting <edwin@datux.nl>, 3 years ago
|
|
bootstuff
|
-
Property mode set to
100644
|
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File size:
909 bytes
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| Line | |
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| 1 | .text |
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| 2 | .code16 |
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| 3 | .arch i386 |
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| 4 | .section ".prefix", "ax", @progbits |
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| 5 | |
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| 6 | /* UNDI loader |
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| 7 | * |
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| 8 | * Called by an external program to load our PXE stack. |
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| 9 | */ |
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| 10 | .globl undiloader |
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| 11 | undiloader: |
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| 12 | /* Save registers */ |
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| 13 | pushl %esi |
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| 14 | pushl %edi |
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| 15 | pushw %ds |
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| 16 | pushw %es |
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| 17 | pushw %bx |
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| 18 | /* ROM segment address to %ds */ |
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| 19 | pushw %cs |
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| 20 | popw %ds |
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| 21 | /* UNDI loader parameter structure address into %es:%di */ |
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| 22 | movw %sp, %bx |
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| 23 | movw %ss:18(%bx), %di |
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| 24 | movw %ss:20(%bx), %es |
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| 25 | /* Install to specified real-mode addresses */ |
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| 26 | pushw %di |
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| 27 | movw %es:12(%di), %bx |
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| 28 | movw %es:14(%di), %ax |
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| 29 | movl image_source, %esi |
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| 30 | movl decompress_to, %edi |
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| 31 | call install_prealloc |
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| 32 | popw %di |
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| 33 | /* Call UNDI loader C code */ |
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| 34 | pushl $pxe_loader_call |
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| 35 | pushw %cs |
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| 36 | pushw $1f |
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| 37 | pushw %ax |
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| 38 | pushw $prot_call |
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| 39 | lret |
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| 40 | 1: popw %bx /* discard */ |
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| 41 | popw %bx /* discard */ |
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| 42 | /* Restore registers and return */ |
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| 43 | popw %bx |
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| 44 | popw %es |
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| 45 | popw %ds |
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| 46 | popl %edi |
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| 47 | popl %esi |
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| 48 | lret |
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| 49 | .size undiloader, . - undiloader |
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