Hello Albert, On 06/13/2013 08:54 PM, Jeroen Hofstee wrote:
binaries only use one type of relocation record, R_ARM_RELATIVE., then optimizing relocation code accordingly.
fyi, I had a look at the clang build and it doesn't boot after these patches... When constant pointers are used without fpie, e.g. the arguments to printf, gcc will load the address with ldr / R_ARM_ABS32, clang sets the address with a movw / movt pair. ld -r will make the former relative, but the movw / movt cannot be fixed. So I set fpie for clang, which generates a couple of R_ARM_ABS32: Most notably a reference to do_bootd. Since it is no longer valid after this patch and used in command.c this crashes the board (unless there happens to be a valid address in it). gcc seems to always recalculate it using pc. Another symbol is _start, but that looks easily fixable. The last one looks similar like the do_bootd and I haven't bothered to check the details. Regards, Jeroen _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
