| .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 |
