We are having issues with R_PPC_ADDR32 relocations being
generated against offsets that are not 32-bit aligned.
This happens with something as simple as:
void
main(void)
{
}
gcc -g -gdwarf-2 -c test.c
generated a test.o that has the following relocations:
dump -rv test.o
test.o:
**** RELOCATION INFORMATION ****
.rela.debug_info:
Offset Symndx Type Addend
0x6 5 1 0
0xc 7 1 0
0x10 2 1 28
0x14 2 1 0
0x55 2 1 0
0x59 2 1 28
.rela.debug_line:
Offset Symndx Type Addend
0x27 2 1 0
0x2f 2 1 12
0x37 2 1 28
.rela.debug_frame:
Offset Symndx Type Addend
0x14 8 1 0
0x18 2 1 0
.rela.debug_pubnames:
Offset Symndx Type Addend
0x6 6 1 0
.rela.debug_aranges:
Offset Symndx Type Addend
0x6 6 1 0
0x10 2 1 0
or
elfdump -r test.o | more
Relocation Section: .rela.debug_info
type offset addend section symbol
0x1 0x6 0 .rela.debug_in .debug_abbre (s
ection)
0x1 0xc 0 .rela.debug_in .debug_line (se
ction)
0x1 0x10 0x1c .rela.debug_in .text (section)
0x1 0x14 0 .rela.debug_in .text (section)
0x1 0x55 0 .rela.debug_in .text (section)
0x1 0x59 0x1c .rela.debug_in .text (section)
Relocation Section: .rela.debug_line
type offset addend section symbol
0x1 0x27 0 .rela.debug_li .text (section)
0x1 0x2f 0xc .rela.debug_li .text (section)
0x1 0x37 0x1c .rela.debug_li .text (section)
Relocation Section: .rela.debug_frame
type offset addend section symbol
0x1 0x14 0 .rela.debug_fr .debug_frame (s
ection)
0x1 0x18 0 .rela.debug_fr .text (section)
Relocation Section: .rela.debug_pubnames
type offset addend section symbol
0x1 0x6 0 .rela.debug_pu .debug_info (se
ction)
Relocation Section: .rela.debug_aranges
type offset addend section symbol
0x1 0x6 0 .rela.debug_ar .debug_info (se
ction)
0x1 0x10 0 .rela.debug_ar .text (section)
You can see that there are relocations of type 1 (R_PPC_ADDR32) that
are against addresses that are 2 byte or even 1 byte aligned.
It seems to me that either the relocation addresses are wrong (which I
think is not the case) or that the relocation type is wrong and it
should be R_PPC_UADDR32 (type 24).
When our gas was built, it was configure with no special options
(just --prefix and --target). Is there something we ought to be doing
to get gas to generate proper relocations?
Thanks in advance,
[EMAIL PROTECTED]
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