.text
.arch i386
.section ".prefix", "awx", @progbits
.code16
.org 0
movw $load_image, %bp
jmp find_active_partition
#include "bootpart.S"
load_image:
movw $_rom_size, %bp
1: /* Truncate read length to end of track */
movzwl %bp, %eax
movw $1, %ax
/* Read sectors */
call *read_sectors
jc load_failed
/* Update %es */
movw %es, %bx
shll $5, %eax
addw %ax, %bx
movw %bx, %es
shrl $5, %eax
/* Update LBA address */
addl %eax, %edi
adcl $0, %esi
/* Update CHS address */
// hmmmm
/* Loop until whole image is read */
subw %ax, %bp
jne 1b
ljmp $BOOT_SEG, $start_image
load_failed:
movw $10f, %si
jmp boot_error
10: .asciz "Could not load gPXE\r\n"
.org 510
.byte 0x55, 0xaa
start_image:
call install
/* Set up real-mode stack */
movw %bx, %ss
movw $_estack16, %sp
/* Jump to .text16 segment */
pushw %ax
pushw $1f
lret
.section ".text16", "awx", @progbits
1:
pushl $main
pushw %cs
call prot_call
popl %eax /* discard */
/* Boot next device */
int $0x18
