Just stumbled on a (mis) feature in gdb that I figured u-boot devs should know about:
powerpc-softfloat_4.5.3-linux-gnu-gdb u-boot GNU gdb (Gentoo 7.4 p1) 7.4 Copyright (C) 2012 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "--host=i686-pc-linux-gnu --target=powerpc-softfloat_4.5.3-linux-gnu". For bug reporting instructions, please see: http://bugs.gentoo.org/... Reading symbols from /usr/local/src/kenth_uboot.git/u-boot...done. (gdb) tar rem bdi:2001 Remote debugging using bdi:2001 _start_cont () at start.S:779 779 lis r1,CONFIG_SYS_INIT_RAM_ADDR@h (gdb) maintenance info breakpoints Num Type Disp Enb Address What -1 shlib events keep y 0xeff80000 <_start> inf 1 (gdb)
Notice the hidden BP gdb adds, this will mess stuff up(consuming a HW BPs or accessing memory that isn't there yet).
Surf into the gdb mailing list for details, so far this is considered a feature.
Jocke
PS. The same happens with vmlinux