From: Olaf Hering <olh@suse.de>
To: Paul Mackeras <paulus@samba.org>, linuxppc-dev@ozlabs.org
Subject: [PATCH] ppc boot: replace string labels with numbers
Date: Thu, 17 Nov 2005 22:09:02 +0100 [thread overview]
Message-ID: <20051117210902.GB31775@suse.de> (raw)
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(-)
Index: linux-2.6.15-rc1-olh/arch/powerpc/boot/crt0.S
===================================================================
--- linux-2.6.15-rc1-olh.orig/arch/powerpc/boot/crt0.S
+++ linux-2.6.15-rc1-olh/arch/powerpc/boot/crt0.S
@@ -14,43 +14,42 @@
.text
.globl _zimage_start
_zimage_start:
- bl reloc_offset
+ bl 1f
-reloc_offset:
+1:
mflr r0
- lis r9,reloc_offset@ha
- addi r9,r9,reloc_offset@l
+ lis r9,1b@ha
+ addi r9,r9,1b@l
subf. r0,r9,r0
- beq clear_caches
+ beq 3f
-reloc_got2:
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 clear_caches
+ beq 3f
srwi. r8,r8,2
mtctr r8
add r9,r0,r9
-reloc_got2_loop:
+2:
lwz r8,0(r9)
add r8,r8,r0
stw r8,0(r9)
addi r9,r9,4
- bdnz reloc_got2_loop
+ bdnz 2b
-clear_caches:
+3:
lis r9,_start@h
add r9,r0,r9
lis r8,_etext@ha
addi r8,r8,_etext@l
add r8,r0,r8
-1: dcbf r0,r9
+4: dcbf r0,r9
icbi r0,r9
addi r9,r9,0x20
cmplwi 0,r9,8
- blt 1b
+ blt 4b
sync
isync
--
short story of a lazy sysadmin:
alias appserv=wotan
next reply other threads:[~2005-11-17 21:09 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-17 21:09 Olaf Hering [this message]
2005-11-17 22:54 ` [PATCH] ppc boot: replace string labels with numbers Jerry Van Baren
2005-11-18 7:42 ` Olaf Hering
2005-11-18 15:30 ` Hollis Blanchard
2005-11-18 22:19 ` Olaf Hering
2005-12-01 21:58 ` Tom Rini
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