linux/arch/powerpc/boot/crt0.S
Olaf Hering 68643cfb87 [PATCH] ppc boot: replace string labels with numbers
Replacing the string labels with numbers saves 117 bytes in the final zImage.
These local labels are not discared.

Signed-off-by: Olaf Hering <olh@suse.de>

 arch/powerpc/boot/crt0.S |   23 +++++++++++------------
 1 files changed, 11 insertions(+), 12 deletions(-)
Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-11-18 13:18:16 +11:00

59 lines
928 B
ArmAsm

/*
* Copyright (C) Paul Mackerras 1997.
*
* 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; either version
* 2 of the License, or (at your option) any later version.
*
* NOTE: this code runs in 32 bit mode and is packaged as ELF32.
*/
#include "ppc_asm.h"
.text
.globl _zimage_start
_zimage_start:
bl 1f
1:
mflr r0
lis r9,1b@ha
addi r9,r9,1b@l
subf. r0,r9,r0
beq 3f
lis r9,__got2_start@ha
addi r9,r9,__got2_start@l
lis r8,__got2_end@ha
addi r8,r8,__got2_end@l
subf. r8,r9,r8
beq 3f
srwi. r8,r8,2
mtctr r8
add r9,r0,r9
2:
lwz r8,0(r9)
add r8,r8,r0
stw r8,0(r9)
addi r9,r9,4
bdnz 2b
3:
lis r9,_start@h
add r9,r0,r9
lis r8,_etext@ha
addi r8,r8,_etext@l
add r8,r0,r8
4: dcbf r0,r9
icbi r0,r9
addi r9,r9,0x20
cmplwi 0,r9,8
blt 4b
sync
isync
mr r6,r1
b start