Atsushi Nemoto wrote:
On Tue, 22 May 2007 17:48:09 +0300, Mika_Penttilä <[email protected]> wrote:
I can't see how this use of r_attend is going to work. find_elf_symbol
compares relsym->st_value to Elf_Rela->r_attend. I think it doesn't work
for RELA archs and even with this patch for REL.
It seems works fine with RELA archs, at least mips64.
For example, set_up_list3s is correctly reported.
WARNING: mm/built-in.o - Section mismatch: reference to .init.text:set_up_list3s from .text between 'kmem_cache_create' (at offset 0x26358) and 'cache_reap'
Here is excerpt from readelf output. Addend value 0x21d8 matches
st_value of its target symbol.
$ mips64-linux-readelf -sr ../build-sb1250/mm/built-in.o
Relocation section '.rela.text' at offset 0x33fe0 contains 5100 entries:
Offset Info Type Sym. Value Sym. Name + Addend
...
000000026358 000400000004 R_MIPS_26 0000000000000000 .init.text + 21d8
Type2: R_MIPS_NONE
Type3: R_MIPS_NONE
...
Symbol table '.symtab' contains 1652 entries:
Num: Value Size Type Bind Vis Ndx Name
...
746: 00000000000021d8 148 FUNC LOCAL DEFAULT 4 set_up_list3s
---
Atsushi Nemoto
So with mips64 you are lucky because the relocation symbol is .init.text
and hence addend matches (has to match) symbol's offset. I can't find
any spec where it is stated that addend == address, maybe it's in mips64
abi or something. It is quite normal to have addend of 0.
--Mika
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