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.text
.code16
.arch i386
.section ".prefix", "ax", @progbits
/* UNDI loader
*
* Called by an external program to load our PXE stack.
*/
.globl undiloader
undiloader:
/* Save registers */
pushl %esi
pushl %edi
pushw %ds
pushw %es
pushw %bx
/* ROM segment address to %ds */
pushw %cs
popw %ds
/* UNDI loader parameter structure address into %es:%di */
movw %sp, %bx
movw %ss:18(%bx), %di
movw %ss:20(%bx), %es
/* Install to specified real-mode addresses */
pushw %di
movw %es:12(%di), %bx
movw %es:14(%di), %ax
movl image_source, %esi
movl decompress_to, %edi
call install_prealloc
popw %di
/* Call UNDI loader C code */
pushl $pxe_loader_call
pushw %cs
pushw $1f
pushw %ax
pushw $prot_call
lret
1: popw %bx /* discard */
popw %bx /* discard */
/* Restore registers and return */
popw %bx
popw %es
popw %ds
popl %edi
popl %esi
lret
.size undiloader, . - undiloader
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