gas:

2009-10-07  Vincent Riviere  <vincent.riviere@freesbee.fr>

        PR gas/3041
        * config/tc-m68k.c (tc_gen_reloc): Fix addend for relocations
        located in data section an referencing a weak symbol.

gas/testsuite:

2009-10-07  Vincent Riviere  <vincent.riviere@freesbee.fr>

        PR gas/3041
        * gas/m68k/all.exp: Added "p3041data".
        * gas/m68k/p3041.d, gas/m68k/p3041.s: Added tests of weak references
        from text section to all possible sections.
        * gas/m68k/p3041data.d, gas/m68k/p3041data.s: New test. Check weak
        references from data section.

gas/ChangeLog

@@ -1,3 +1,9 @@
+2009-10-013  Vincent Riviere  <vincent.riviere@freesbee.fr>	
+
+	PR gas/3041
+	* config/tc-m68k.c (tc_gen_reloc): Fix addend for relocations
+	located in data section an referencing a weak symbol.
+
 2009-10-07  Nathan Sidwell  <nathan@codesourcery.com>
 
 	* config/tc-arm.c (mapping_state, mapping_state_2): Make dummy

gas/config/tc-m68k.c

@@ -1326,10 +1326,29 @@ tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS *fixp)
 	   && fixp->fx_addsy
 	   && S_IS_WEAK (fixp->fx_addsy)
 	   && ! bfd_is_und_section (S_GET_SEGMENT (fixp->fx_addsy)))
-    /* PR gas/3041 Adjust addend in order to force bfd_install_relocation()
+    {
-       to put the symbol offset into frags referencing a weak symbol.  */
+      /* PR gas/3041 References to weak symbols must be treated as extern
-    reloc->addend = fixp->fx_addnumber
+	 in order to be overridable by the linker, even if they are defined
-		    - (S_GET_VALUE (fixp->fx_addsy) * 2);
+	 in the same object file. So the original addend must be written
+	 "as is" into the output section without further processing.
+	 The addend value must be hacked here in order to force
+	 bfd_install_relocation() to write the original value into the
+	 output section.
+	 1) MD_APPLY_SYM_VALUE() is set to 1 for m68k/a.out, so the symbol
+	 value has already been added to the addend in fixup_segment(). We
+	 have to remove it.
+	 2) bfd_install_relocation() will incorrectly treat this symbol as
+	 resolved, so it will write the symbol value plus its addend and
+	 section VMA. As a workaround we can tweak the addend value here in
+	 order to get the original value in the section after the call to
+	 bfd_install_relocation().  */
+      reloc->addend = fixp->fx_addnumber
+		      /* Fix because of MD_APPLY_SYM_VALUE() */
+		      - S_GET_VALUE (fixp->fx_addsy)
+		      /* Fix for bfd_install_relocation() */
+		      - (S_GET_VALUE (fixp->fx_addsy)
+			 + S_GET_SEGMENT (fixp->fx_addsy)->vma);
+    }
   else
     reloc->addend = 0;
 #else

gas/testsuite/ChangeLog

@@ -1,3 +1,12 @@
+2009-10-13  Vincent Riviere  <vincent.riviere@freesbee.fr>	
+
+	PR gas/3041
+	* gas/m68k/all.exp: Added "p3041data".
+	* gas/m68k/p3041.d, gas/m68k/p3041.s: Added tests of weak references
+	from text section to all possible sections.
+	* gas/m68k/p3041data.d, gas/m68k/p3041data.s: New test. Check weak
+	references from data section.
+
 2009-10-08  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR gas/10704

gas/testsuite/gas/m68k/all.exp

@@ -71,6 +71,7 @@ if { [istarget m68*-*-*] || [istarget fido*-*-*] } then {
 
     if { [istarget *-*-netbsd] } then {
       run_dump_test p3041
+      run_dump_test p3041data
     }
 
     set testname "68000 operands"

gas/testsuite/gas/m68k/p3041.d

@@ -1,15 +1,36 @@
 #name: PR 3041
-#objdump: -dr
+#objdump: -tdr
 
 .*:     file format .*
 
-Disassembly of section .text:
+SYMBOL TABLE:
+00000036  w      \.text 0000 00 0f mytext
+0000003e  w      \.data 0000 00 10 mydata
+0000004a  w      \.bss  0000 00 11 mybss
 
-0+ <.*>:
+Disassembly of section \.text:
-   0:	4ef9 0000 0002 [ 	]+jmp 2 <mylabel-0x6>
-			2: .*	mylabel
-   6:	4e71 [ 	]+nop
 
-0+8 <mylabel>:
+00000000 <.*>:
-   8:	4e71 [ 	]+nop
+   0:	41f9 0000 0000 	lea 0 <.*>,%a0
-   a:	4e71 [ 	]+nop
+			2: 32	mytext
+   6:	41f9 0000 0002 	lea 2 <.*>,%a0
+			8: 32	mytext
+   c:	41f9 ffff fffc 	lea fffffffc <.*>,%a0
+			e: 32	mytext
+  12:	41f9 0000 0000 	lea 0 <.*>,%a0
+			14: 32	mydata
+  18:	41f9 0000 0003 	lea 3 <.*>,%a0
+			1a: 32	mydata
+  1e:	41f9 ffff ffff 	lea ffffffff <.*>,%a0
+			20: 32	mydata
+  24:	41f9 0000 0000 	lea 0 <.*>,%a0
+			26: 32	mybss
+  2a:	41f9 0000 0001 	lea 1 <.*>,%a0
+			2c: 32	mybss
+  30:	41f9 ffff fffe 	lea fffffffe <.*>,%a0
+			32: 32	mybss
+
+00000036 <mytext>:
+  36:	4e71           	nop
+  38:	4e71           	nop
+  3a:	4e71           	nop

gas/testsuite/gas/m68k/p3041.s

@@ -1,6 +1,27 @@
-	jmp	mylabel+2
+	lea	mytext,%a0
-	nop
+	lea	mytext+2,%a0
-	.weak	mylabel
+	lea	mytext-4,%a0
-mylabel:
+	lea	mydata,%a0
+	lea	mydata+3,%a0
+	lea	mydata-1,%a0
+	lea	mybss,%a0
+	lea	mybss+1,%a0
+	lea	mybss-2,%a0
+	.weak	mytext
+mytext:
 	nop
 	nop
+	nop
+
+	.data
+	.word	0x8081
+	.weak	mydata
+mydata:
+	.word	0x8283
+	.word	0x8485
+
+	.bss
+	.skip	6
+	.weak	mybss
+mybss:
+	.skip	2

gas/testsuite/gas/m68k/p3041data.d

@@ -0,0 +1,28 @@
+#name: PR 3041 data
+#objdump: -trs
+
+.*:     file format .*
+
+SYMBOL TABLE:
+00000006  w      \.text 0000 00 0f mytext
+00000014  w      \.data 0000 00 10 mydata
+00000040  w      \.bss  0000 00 11 mybss
+
+RELOCATION RECORDS FOR \[\.data\]:
+OFFSET   TYPE              VALUE 
+00000004 32                mytext
+00000008 32                mytext
+0000000c 32                mytext
+00000010 32                mydata
+00000014 32                mydata
+00000018 32                mydata
+0000001c 32                mybss
+00000020 32                mybss
+00000024 32                mybss
+
+Contents of section .text:
+ 0000 4e714e71 4e714e71                    .*
+Contents of section .data:
+ 0008 12345678 00000000 00000001 fffffffd  .*
+ 0018 00000000 00000003 fffffffe 00000000  .*
+ 0028 00000002 ffffffff                    .*

gas/testsuite/gas/m68k/p3041data.s

@@ -0,0 +1,27 @@
+	.text
+	nop
+	nop
+	nop
+	.weak	mytext
+mytext:
+	nop
+
+	.data
+	.long	0x12345678
+	.long	mytext
+	.long	mytext+1
+	.weak	mydata
+mydata:
+	.long	mytext-3
+	.long	mydata
+	.long	mydata+3
+	.long	mydata-2
+	.long	mybss
+	.long	mybss+2
+	.long	mybss-1
+
+	.bss
+	.skip	16
+	.weak	mybss
+mybss:
+	.word	1