Error in head-common.S file while ARM Linux booting

Madhavi Manchala madhavi.linux at
Thu Apr 21 06:31:20 EDT 2011

Dear All,

I have developed machine code for my Samsung S3C2510A MCU under Linux
kernel 2.6.36. The code exists at arch/arm/mach-s3c2510a. I developed
only CPU, UART and Clocks initialization code, especially. For
developing the S3C2510A HAL code, I have gone through the existing
mach-s3c2410 code.

I build vmlinux image on a Linux box in the ELF format for my Samsung
MCU. Then, I am trying to load the build vmlinux image on to my
device’s (targets) RAM area using J-link J-TAG and J-LinkGDBServer
tool with a gdbinit script file from Cygwin on a Windows XP system.
The gdb init script file initializes the CPU system configuration
registers, RAM, Flash and UART registers and then loads ELF image.

I am able to put break points in the developed HAL code. However, when
I run (continue) from gdb prompt, I did not see any break points in
the GDB server tool, but, when I press “Ctrl+C”, I am seeing the
following messages.

<gdb> break s3c2510a_init
Breakpoint 1 at 0x3000b648: file arch/arm/mach-s3c2510a/s3c2510a.c, line 59.
<gdb> c

Pressing “control+c”, then the statements are as follows.

Program received signal SIGTRAP, Trace/Breakpoint trap.
__error_p () at head-common.S:142

#0 __error_p () at head-common.S:142

Why am I seeing these errors? Am I missing any CPU configuration, still?

FYI: I build the kernel with debugging information enabled i.e. I set
CONFIG_DEBUG_KERNEL to y. I did not see any debug messages in the
hyper terminal.
I have gone through the following links. However, there are all based
on the 2.4.x kernel versions. I think, they are slightly different.

Any hints/help/links would be appreciated.

Thanks and Regards,
Madhavi M.

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