http://sourceware.org/bugzilla/show_bug.cgi?id=13899
Bug #: 13899
Summary: [avr]: Wrong relaxation of R_AVR_16_PM with gs()
Product: binutils
Version: 2.23 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: ld
AssignedTo: unassig...@sourceware.org
ReportedBy: g...@gcc.gnu.org
CC: eric.wedding...@atmel.com
Classification: Unclassified
Target: avr
Created attachment 6301
--> http://sourceware.org/bugzilla/attachment.cgi?id=6301
bug-relax.zip: Files to reproduce
The linker computes wrong values for gs() initializers like from text.s:
.global menuitem_text
.section .progmem.data,"a",@progbits
.type menuitem_text, @object
.size menuitem_text, 14
menuitem_text:
.word gs(onPixel_text)
.word gs(onRedraw_text)
.word gs(onKey_text)
.word gs(onEnter_text)
I tried to work out a small example, but with no avail.
So I post the whole project.
Steps to reproduce:
1) Unpack the attached zip file. It inflates to ./bug-relax/
2) cd ./bug-relax
3) There are assembler sources in the directory and a small Makefile. Run
make obj all
4) This generates two files bug.elf and bug.lst
bug.lst is diff'ed against good.lst generated with avr-ld 2.21
All in all, the "make obj all" will print something like
avr-as -mmcu=atmega168 frac8.ss -o frac8-asm.o
avr-as -mmcu=atmega168 parith-16.ss -o parith-16-asm.o
...
avr-ld -m avr5 -Tdata 0x800100 crtm168.o -v -o bug.elf --relax ...
GNU ld (GNU Binutils) 2.22.52.20120322
diff -u1 good.lst bug.lst
-good.elf: file format elf32-avr
+bug.elf: file format elf32-avr
@@ -81,3 +81,3 @@
0000008e <menuitem_text>:
- 8e: 78 06 23 06 af 05 18 06 19 01 28 04 4f 01
+ 8e: 7c 06 24 06 af 05 18 06 19 01 28 04 4f 01
@@ -163,3 +163,3 @@
00000299 <menuitem_asteroids>:
- 299: 61 0c 6a 0d 1a 0b de 0a 8f 02 08 02 e8 02
+ 299: 70 0c 7f 0d 1b 0b de 0a 8f 02 08 02 e8 02
@@ -217,3 +217,3 @@
000003ae <menuitem_snake>:
- 3ae: 92 11 7d 10 24 0f 58 0f 6d 03 52 02 bc 03
+ 3ae: 92 11 7f 10 24 0f 58 0f 6d 03 52 02 bc 03
@@ -263,3 +263,3 @@
00000491 <menuitem_schoner>:
- 491: 9a 14 e3 13 18 14 09 14 02 01 00 08 9f 04
+ 491: 9b 14 e3 13 18 14 09 14 02 01 00 08 9f 04
In text.s: menuitem_text the first enty is
.word gs(onPixel_text)
This function is located at word address 0x0678:
00000cf0 <onPixel_text>
But bug.lst has 0x67c as printed in the diff above.
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