Matthew L. Creech wrote:

Using the latest toolchain from CodeSourcery (4.3-50), I can't seem to build U-Boot for the MPC8313 ERDB platform. I've tried this with both 2008.10 and 2009.01-rc1. Grabbing a fresh copy of U-Boot and doing "make MPC8313ERDB_33_config && make" seems to work at first, but near the end when it does:

powerpc-linux-gnu-objcopy --gap-fill=0xff -O binary u-boot u-boot.bin

things freeze as objcopy attempts to create a 4GB "u-boot.bin". The output file looks legit until here:

00008950 20 57 61 72 6e 69 6e 67 3a 20 52 54 43 20 6f 73 | Warning: RTC os| 00008960 63 69 6c 6c 61 74 6f 72 20 68 61 73 20 73 74 6f |cillator has sto| 00008970 70 70 65 64 0a 00 ff ff ff ff ff ff ff ff ff ff |pped............| 00008980 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................| 00008990 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................| 000089a0 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|

The file size is 4261653072 bytes - this is 0xFE03AA50, which is suspiciously close to the base NOR address of 0xFE000000, so I'm assuming that it's attempting to gap-fill the entire address space for some reason. I'm not sure whether the issue lies with U-Boot or with binutils, though, or how to fix it - any ideas on what's wrong here?

Thanks

-- Matthew L. Creech

Hi Matthew,

It is most likely a u-boot configuration problem where there is something (e.g. code) at a low address and a high address and objcopy is gap filling.

Use "objdump -h" to dump the sections and look at what sections and addresses are. You will likely find loadable sections at both ends of your memory map.

HTH, gvb