http://sourceware.org/bugzilla/show_bug.cgi?id=13899
--- Comment #3 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2012-04-28
12:33:28 UTC ---
(In reply to comment #2)
>
> Disassembly of section .text:
>
> 00000000 <menuitem_uhr>:
> 0: 0a 00 [...]
>
> 0000000e <onPixel_uhr>:
>
> The first entry of menuitem_uhr is 0x000a. The correct value
> is 0x0007 = 0xe / 2, i.e. the word address of menuitem_uhr.
_______________________________________________^^^^^^^^^^^^^^^
The word address of onPixel_uhr, of course.
Note: The testcase can be simplified even more to:
.text
call onPixel_uhr
onPixel_uhr:
nop
.section .progmem.data,"a",@progbits
.type menuitem_uhr, @object
menuitem_uhr:
.word gs(onPixel_uhr)
And then assembled/linked/dumped
$ avr-as -mmcu=atmega168 uhr.s -o uhr.o
$ avr-ld -o bug13899.elf -m avr5 --relax uhr.o
$ avr-objdump -d bug13899.elf
Disassembly of section .text:
00000000 <menuitem_uhr>:
0: 03 00 ..
00000002 <__ctors_end>:
2: 00 d0 rcall .+0 ; 0x4 <onPixel_uhr>
00000004 <onPixel_uhr>:
...
The word address of onPixel_uhr is 0x0002, but menuitem_uhr recorded 0x0003.
The error also occurs if menuitem_uhr is located in .data instead of in section
.progmem.data
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