Le 02/11/2010 08:18, V, Aneesh a écrit :
Thanks. This helps. I did the .lds change and it seems to be booting now.
Good!
However, I can't still explain my earlier observation because even in the absence of this fix .rel.dyn had some content and the offsets should have been different if I were to believe objdump.
Do you have any clue?
There were two issues:
First, "older" linkers always emitted input relocation sections with the name ".rel.dyn" whereas "newer" linkers emitted them with names of the form ".rel*". As our linker files only took ".rel.dyn" to form the output section, using newer linkers would produce empty .rel.dyn sections.
Second, a fix to the first issue was RFCed to the list which worked on several boards but tx25 would not boot completely. The root cause of this second issue is that CONFIG_SYS_NAND_U_BOOT_SIZE in the board config file hard-codes the size of the u-boot binary that will be read from NAND and put in RAM. When/if u-boot grows in size, this constant must be adjusted, and it was not.
What hit you was the first issue for sure, and this explains why _rel_dyn_start_ofs and _rel_dyn_end_ofs are identical. What *could* have hit you was the second issue *if* your board boots from NAND *and* if u-boot grew beyond your CONFIG_SYS_NAND_U_BOOT_SIZE.
BTW, Wolfgang, couldn't this 'constant' be generated once objcopy has produced u-boot.bin? A script could 'du' its size, round it up as required, and generate a .h with the result so that the SPL would always compile with a correct value.
Best regards, Aneesh
Amicalement,