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|
; -*- fundamental -*-
; -----------------------------------------------------------------------
;
; Copyright 2004-2008 H. Peter Anvin - All Rights Reserved
; Copyright 2009 Intel Corporation; author: H. Peter Anvin
;
; This program is free software; you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation, Inc., 53 Temple Place Ste 330,
; Boston MA 02111-1307, USA; either version 2 of the License, or
; (at your option) any later version; incorporated herein by reference.
;
; -----------------------------------------------------------------------
;
; init.inc
;
; Common initialization code (inline)
;
section .text16
common_init:
; Initialize PM invocation framework
call pm_init
%if IS_PXELINUX
; Save derivative-specific data
pm_call pm_save_data
%endif
; Decompress PM code to its target location
pm_call pm_decompress
cmp eax,__pm_code_len
jne kaboom
extern syslinux_register_bios, init
pm_call syslinux_register_bios
pm_call init
;
; The code to decompress the PM code and initialize other segments.
;
extern _lzo1x_decompress_asm_fast_safe
section .textnr
bits 32
pm_decompress:
push __pm_code_len + 16 ; Space for decompressed size
push esp ; Pointer to previous word
push __pm_code_start ; Target address
push dword [lzo_data_size] ; Compressed size
push dword __pm_code_lma
call _lzo1x_decompress_asm_fast_safe
add esp,16
pop RM_EAX ; Decompressed size
; Zero bss sections (but not .earlybss, since it may
; contain already-live data.)
xor eax,eax
mov edi,__bss_start
mov ecx,__bss_dwords
rep stosd
mov edi,__bss16_start
mov ecx,__bss16_dwords
rep stosd
mov edi,__high_clear_start ; .uibss, .lowmem
mov ecx,__high_clear_dwords
rep stosd
ret
section .data16
lzo_data_size dd 0 ; filled in by compressor
section .text16
bits 16
|
