In message 81E628E8AA1F464C89A772D5018B6D200C4E48@excbikor.ikor.local you wrote:
I'm using BDI2000, and when I try to debug U-Boot the code hangs in relocate function in start.S file. The exact instruction that hangs the gdb is: "sub r2, r3, r2 /* r2 <- size of u-boot */"
It's pretty unlikely that it hangs on this specific instruction as it has register operands only, so there is no reason it could abort
1- One problem is that I don't see how the general purpose registers (r0, r1...) values change, i.e. when "ldr r0, _start" is executed, r0 doesn't change, is this normal? (Is it possible
No, this is not normal.
Are you sure that:
* You have the correct firmware loaded into your BDI2000? * You use the correct debug cable? * You use a correct config file?
When I compile the code,there are no errors or warnings, but a UNDEF_SYM appears:
What do you mean by "appears"? That it's used in the commands?
UNDEF_SYM=`arm-unknown-linux-gnu-objdump -x lib_generic/libgeneric.a \ board/LinCon/libLinCon.a cpu/arm920t/libarm920t.a cpu/arm920t/imx/libimx.a \ lib_arm/libarm.a fs/cramfs/libcramfs.a fs/fat/libfat.a fs/fdos/libfdos.a \ fs/jffs2/libjffs2.a fs/reiserfs/libreiserfs.a fs/ext2/libext2fs.a net/libnet.a \ disk/libdisk.a rtc/librtc.a dtt/libdtt.a drivers/libdrivers.a drivers/sk98lin/libsk98lin.a \ post/libpost.a post/cpu/libcpu.a common/libcommon.a |sed -n -e \ 's/.*(__u_boot_cmd_.*)/-u\1/p'|sort|uniq`;\
The shell variable "UNDEF_SYM" gets defined by the previous statement...
arm-unknown-linux-gnu-ld -Bstatic -T \ /home/iim/IKOR/LinuxEmpotrado/LinCon/build_tools/u-boot/u-boot-1.1.3/boar d/LinCon/u-boot.lds \ -Ttext 0x08f00000 $UNDEF_SYM cpu/arm920t/start.o \
...and is used here. Thi sis perfectly OK - no reason to worry.
2- When I compile u-boot for my Evaluation Board (MX1ADS), this UNDEF_SYM appears, but u-boot works without any problem! Is this a problem, or only a "warning"?
This is no problem, and no warning either. It is perfectly fine.
Content-Type: text/html; charsetÿso-8859-1" Content-Transfer-Encoding: quoted-printable
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML>
Please *never* post HTML to this list. Never!
Best regards,
Wolfgang Denk