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[PATCH] ppc64 boot: proof that reloc works

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To prove that the relocation works, move the crt0.o away from the beginning.
Move linker options from command line into linker script.  rename entry point
because '_start' is referenced in printf output.

Signed-off-by: Olaf Hering <olh@suse.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Olaf Hering 2005-10-28 17:46:49 -07:00 committed by Paul Mackerras
parent a4497235f0
commit 67a1b68263
3 changed files with 7 additions and 4 deletions
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4
arch/ppc64/boot/Makefile
View File

@ -24,7 +24,7 @@
HOSTCC := gcc
BOOTCFLAGS := $(HOSTCFLAGS) -fno-builtin -nostdinc -isystem $(shell $(CROSS32CC) -print-file-name=include) -fPIC
BOOTAFLAGS := -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional -nostdinc
BOOTLFLAGS := -Ttext 0x00400000 -e _start -T $(srctree)/$(src)/zImage.lds
BOOTLFLAGS := -T $(srctree)/$(src)/zImage.lds
OBJCOPYFLAGS := contents,alloc,load,readonly,data
zlib := infblock.c infcodes.c inffast.c inflate.c inftrees.c infutil.c
@ -34,7 +34,7 @@ zliblinuxheader := zlib.h zconf.h zutil.h
$(addprefix $(obj)/,$(zlib) main.o): $(addprefix $(obj)/,$(zliblinuxheader)) $(addprefix $(obj)/,$(zlibheader))
#$(addprefix $(obj)/,main.o): $(addprefix $(obj)/,zlib.h)
src-boot := crt0.S string.S prom.c main.c div64.S
src-boot := string.S prom.c main.c div64.S crt0.S
src-boot += $(zlib)
src-boot := $(addprefix $(obj)/, $(src-boot))
obj-boot := $(addsuffix .o, $(basename $(src-boot)))

4
arch/ppc64/boot/crt0.S
View File

@ -12,8 +12,8 @@
#include "ppc_asm.h"
.text
.globl _start
_start:
.globl _zimage_start
_zimage_start:
bl reloc_offset
reloc_offset:

3
arch/ppc64/boot/zImage.lds
View File

@ -1,6 +1,9 @@
OUTPUT_ARCH(powerpc:common)
ENTRY(_zimage_start)
SECTIONS
{
. = (4*1024*1024);
_start = .;
.text :
{
*(.text)