在 2023/8/31 13:39, Chris Johns 写道:
On 31/8/2023 3:12 pm, zhengxiaojun wrote:
在 2023/8/31 6:05, Chris Johns 写道:
On 31/8/2023 12:48 am, zhengxiaojun wrote:
Hi,
I use the latest rtems-tools to generate RAP file, I found the object file
become too small(elf,2184bytes==>rap,736bytes) and the file loaded failed, error
message like this "load app.out error:offset past end of file: offset=736
size=736 error."
What arch and BSP?
I reverted the rtl-rap.cpp commit( 0ad4aaafc20afcb5aacb7a82b0b3a8150b638975
linker/rap: Ignore relocation records with no section), the rap file can be
loaded.
I think the commit has the wrong ticket id, it should be 4069 ...
https://devel.rtems.org/ticket/4069
My guess is the length includes the relocs that have been dropped because they
do not have a symbol section. A reloc without a symbol section cannot be located
because you do not know the section to locate it against.
Are you able to review the rtems-ld code for the issue?
I found something suspicious, get_relocations(s) return all the count of
relocation and write to rap file, but actual count is less, because ignore the
reloc with section=0.
Right, this aligns with my guess. That value should the number written out and
it should not assume all are written.
This issue is similar to ticket #4781, maybe the same.
Yeah it could. It would be nice if it is.
reduce count or write all relocs in rap ? I do not know which is the right
solution.
I am not sure. If relocs are needed then we have to have them and the patch you
isolated is wrong or needs more understanding to know why it is there. I suspect
an arch had an issue and this was the solution but that is guess on my part.
I tried to make the length fit the relocs write to rap file, the file
can not be loaded, it crashed. So the relocs(reloc.symsect == 0) can not
be ignored, at least in arm.
In addition, I saw a loader complaint "rtl: unsupported section:..."
about .ARM.attributes， the arm linkcmds always keep it.
Should it be dealt with?
Chris
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