[Bug ld/13899] [avr]: Wrong relaxation of R_AVR_16_PM with gs()

[gjl at gcc dot gnu.org]

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

-- 
Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are on the CC list for the bug.