Hi there,

I'm working on the port of U-Boot to a new custom board based on the i.MX1 (ARM920T). I noticed that in the start.S the code in which the .bss will be cleared, loops until _bss_start != _bss_end i.e.

clear_bss: ldr r0, _bss_start /* find start of bss segment */ add r0, r0, #4 /* start at first byte of bss */ ldr r1, _bss_end /* stop here */ mov r2, #0x00000000 /* clear */

clbss_l:str r2, [r0] /* clear loop... */ add r0, r0, #4 cmp r0, r1 bne clbss_l

So, when _bss_end is not forced to be .ALIGNED(4) like the _bss_start is, the code may loops till it crashs :-( This is what actually happened in my case. Now to fix the problem on my port I changed my u-boot.lds as:

. = ALIGN(4); __bss_start = .; .bss : { *(.bss) } _end = ALIGN(4);

and to be consistent I replaced the 'bne clbss_1' with 'ble clbss_1' instruction.

I was wondering if I'm missing something on the linker directives or indeed it is small bug.

Thanks for your suggestions, -Paolo Broggini