emaste created this revision.
emaste added a subscriber: freebsd-toolchain.
REVISION SUMMARY
In practice .rela debug relocations often use the the .debug_* sections as
the symbol, which has the value 0:
```
Relocation section '.rela.debug_info' at offset 0xd18 contains 205 entries:
Offset Info Type Sym. Value Sym. Name +
Addend
000000000006 001a0000000a R_X86_64_32 0000000000000000 .debug_abbrev + 0
00000000000c 001e0000000a R_X86_64_32 0000000000000000 .debug_str + 0
000000000012 001e0000000a R_X86_64_32 0000000000000000 .debug_str + 45
```
so in those cases there is no difference if the symbol value is used in the
relocation or not.
It is not always the case though:
```
000000000039 002700000001 R_X86_64_64 0000000000000010 xen_pci_driver
+ 0
```
REVISION DETAIL
https://reviews.freebsd.org/D1826
AFFECTED FILES
libdwarf/libdwarf_elf_init.c
To: emaste
Cc: freebsd-toolchain
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