My target board is based on i386 architecture. After I enable CONFIG_CMD_KGDB in the board config file, during building it reports link error : undefined reference to `kgdb_longjmp'

I checked the directory, only found the function definition for powerpc, but no definition for x86 arch/powerpc/lib/kgdb.c:kgdb_longjmp(long *buf, int val)

Does it mean that if I want to enable debugging u-boot through serial port on x86 , then I need to copy/port the implementation of kgdb.c to u-boot, enable it and build it?

Thanks, Chi

From: Ding, ChiX Sent: Tuesday, August 23, 2016 3:25 PM To: 'u-boot@lists.denx.de' u-boot@lists.denx.de Subject: remote debug u-boot through serial port

Hi there I'm learning how to remote debug u-boot through serial port. In menuconfig general setup, I selected "enable debug information for tools". It adds -g in gcc flag. After built is over, I got u-boot, u-boot.sym, u-boot.map and a few other files. When I run objdump -trS u-boot, it does show the source code and the symbols.

However in gdb, when I tried to load the ELF executable file, I got this error (gdb) file u-boot Reading symbols from u-boot...BFD: /root/work/cid_iafw_opensource-coreboot/payloads/external/U-Boot/u-boot/u-boot: attempt to load strings from a non-string section (number 0) BFD: /root/work/cid_iafw_opensource-coreboot/payloads/external/U-Boot/u-boot/u-boot: attempt to load strings from a non-string section (number 0)

Anything I missed and caused this issue? Also I wonder if I want to enable remote debugging of u-boot through serial port, what shall I do in the configuration? I didn't see such option in menuconfig. Is it enabled by default or shall I enable CONFIG_CMD_KGDB in my board config file ?

Thanks, Chi

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