linker script for building hello_world.c on arm

Hello

I was unable to build the hello_world.c example for my arm target without adding a linker script. The attached patch fixes this.

Please apply.

CHANGELOG

* Patch by Lars Munch, 02 Sep 2004:
- Added linker script for building hello_world.c on arm

Best regards
Lars Munch

-------------- next part --------------

diff -Nru u-boot-orig/examples/arm.lds u-boot/examples/arm.lds
@@ -0,0 +1,48 @@
+/*
+ * (C) Copyright 2002
+ * Gary Jennejohn, DENX Software Engineering, <[email protected]>
+ *
+ * Modified for u-boot examples by Lars Munch, <[email protected]>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+SECTIONS
+{
+        .text       :
+        {
+          *(.text)
+        }
+
+	. = ALIGN(4);
+	.rodata : { *(.rodata) }
+
+	. = ALIGN(4);
+	.data : { *(.data) }
+
+	. = ALIGN(4);
+	.got : { *(.got) }
+
+	. = ALIGN(4);
+	__bss_start = .;
+	.bss : { *(.bss) }
+	_end = .;
+}

diff -Nru u-boot-orig/examples/Makefile u-boot/examples/Makefile
@@ -30,7 +30,7 @@
 endif
 
 ifeq ($(ARCH),arm)
-LOAD_ADDR = 0xc100000
+LOAD_ADDR = 0xc100000 -T arm.lds
 endif
 
 ifeq ($(ARCH),mips)

Why do you need such a script, when all the existing ARM (and MIPS, and PowerPC, and ...) systems don't need one?

Sorry, but I won't. At least not before I understand the reason why it should be necessary.

Best regards,

Wolfgang Denk

Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
Administration: An ingenious abstraction  in  politics,  designed  to
receive the kicks and cuffs due to the premier or president.
- Ambrose Bierce

The mips and nios systems uses a linker script for building hello_world, so I thought this was a common problem.

This is the linker error I get when building examples using 91rm9200dk_config:

arm-linux-gcc -g -Os -fno-strict-aliasing -fno-common -ffixed-r8
-D__KERNEL__ -DTEXT_BASE=0x21f80000 -I/home/lmc/u-boot-orig/include -fno-builtin -ffreestanding -nostdinc -isystem /opt/arm-linux/lib/gcc/arm-linux/3.4.1/include -pipe -DCONFIG_ARM -D__ARM__ -mapcs-32 -march=armv4 -mtune=arm7tdmi -Wall
-Wstrict-prototypes -g -Os -fno-strict-aliasing -fno-common
-ffixed-r8 -D__KERNEL__ -DTEXT_BASE=0x21f80000 -I/home/lmc/u-boot-orig/include -fno-builtin -ffreestanding -nostdinc -isystem /opt/arm-linux/lib/gcc/arm-linux/3.4.1/include -pipe -DCONFIG_ARM -D__ARM__ -mapcs-32 -march=armv4 -mtune=arm7tdmi -I.. -Bstatic -T /home/lmc/u-boot-orig/board/at91rm9200dk/u-boot.lds -Ttext
0x21f80000 hello_world.c -o hello_world
/opt/arm-linux/lib/gcc/arm-linux/3.4.1/../../../../arm-linux/bin/ld:
crt1.o: No such file: No such file or directory
collect2: ld returned 1 exit status
make[1]: *** [hello_world] Error 1
make[1]: Leaving directory `/home/lmc/u-boot-orig/examples'
make: *** [examples] Error 2

I am using binutils-2.15 and gcc-3.4.1. I have builded gcc with:

../gcc-3.4.1/configure --target=arm-linux --with-gnu-as \
--with-gnu-ld --enable-languages="c" --verbose \
--disable-threads --without-headers --disable-shared --disable-nls

Am I missing something?

Best regards
Lars Munch

...

This is a bug in your toolchain.

Argh... Please refer to the archives of the linux-arm-toolchain mailing list.

Best regards,

Wolfgang Denk

Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
The more we disagree, the more chance there is that at least  one  of
us is right.

Thanks, I'll look into that.

Best regards
Lars Munch