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Re: [PATCH] fix underfined Thumb symbols (try 2)


On Wednesday 06 September 2006 13:25, Richard Earnshaw wrote:
> On Wed, 2006-09-06 at 10:07, Vladimir Prus wrote:
> > Hello!
> >
> > some time ago I sent a patch that stops binutils from settings low bit of
> > ARM Thumb external symbols, see:
> >
> >    http://sources.redhat.com/ml/binutils/2006-06/msg00273.html
> >
> > That patch was approved and committed, but after that I've discovered
> > that the patch had one line wrong, so new code had no effect, and the new
> > test just failed.
...
> This is ok, but can you correct the spelling mistake in the comment that
> precedes this: it's "undefined" not "underfined" (no 'r').

Sure, here's revised patch.

bfd/
2006-09-04  Vladimir Prus  <vladimir@codesourcery.com>

        * elf32-arm.c (elf32_arm_swap_symbol_out): Remove
        unconditional setting of low bit for Thumb symbol
        mistakenly left behind after check for external
        symbols was added. Fix comment typo.

ld/testsuite/

2006-09-04  Vladimir Prus  <vladimir@codesourcery.com>
        * ld-arm/use-thumb-lib.sym: Use regexps instead of
        absolute addresses, for robustness.


To remind, no write access yet.

Thanks,
Volodya
? arm_thumb_externals_mainline.diff
Index: bfd/elf32-arm.c
===================================================================
RCS file: /cvs/src/src/bfd/elf32-arm.c,v
retrieving revision 1.88
diff -u -p -r1.88 elf32-arm.c
--- bfd/elf32-arm.c	4 Sep 2006 07:11:11 -0000	1.88
+++ bfd/elf32-arm.c	7 Sep 2006 08:18:41 -0000
@@ -9385,14 +9385,12 @@ elf32_arm_swap_symbol_out (bfd *abfd,
              linker will simulate the work of dynamic linker of resolving
              symbols and will carry over the thumbness of found symbols to
              the output symbol table. It's not clear how it happens, but
-             the thumbness of underfined symbols can well be different at
+             the thumbness of undefined symbols can well be different at
              runtime, and writing '1' for them will be confusing for users
              and possibly for dynamic linker itself.
           */
           newsym.st_value |= 1;
         }
-
-      newsym.st_value |= 1;
       
       src = &newsym;
     }
Index: ld/testsuite/ld-arm/use-thumb-lib.sym
===================================================================
RCS file: /cvs/src/src/ld/testsuite/ld-arm/use-thumb-lib.sym,v
retrieving revision 1.2
diff -u -p -r1.2 use-thumb-lib.sym
--- ld/testsuite/ld-arm/use-thumb-lib.sym	20 Jun 2006 13:55:08 -0000	1.2
+++ ld/testsuite/ld-arm/use-thumb-lib.sym	7 Sep 2006 08:18:43 -0000
@@ -1,15 +1,16 @@
 
 Symbol table for image:
   Num Buc:    Value  Size   Type   Bind Vis      Ndx Name
-   11   0: 0000830c     0  NOTYPE GLOBAL DEFAULT ABS _edata
-   10   0: 00000268    20    FUNC GLOBAL DEFAULT   6 foo
-    4   0: 0000830c     0  NOTYPE GLOBAL DEFAULT ABS __bss_start__
-   12   1: 0000830c     0  NOTYPE GLOBAL DEFAULT ABS _end
-    7   1: 0000830c     0  NOTYPE GLOBAL DEFAULT ABS __bss_end__
-    5   1: 0000027c     0  NOTYPE GLOBAL DEFAULT ABS __exidx_start
-   13   2: 0000830c     0  NOTYPE GLOBAL DEFAULT ABS __data_start
-    9   2: 0000830c     0  NOTYPE GLOBAL DEFAULT ABS __end__
-    8   2: 0000830c     0  NOTYPE GLOBAL DEFAULT ABS __bss_start
+   11   0: [0-9a-f]*     0  NOTYPE GLOBAL DEFAULT ABS _edata
+   10   0: [0-9a-f]*    20    FUNC GLOBAL DEFAULT   6 foo
+    4   0: [0-9a-f]*     0  NOTYPE GLOBAL DEFAULT ABS __bss_start__
+   12   1: [0-9a-f]*     0  NOTYPE GLOBAL DEFAULT ABS _end
+    7   1: [0-9a-f]*     0  NOTYPE GLOBAL DEFAULT ABS __bss_end__
+    5   1: [0-9a-f]*     0  NOTYPE GLOBAL DEFAULT ABS __exidx_start
+   14   2: [0-9a-f]*     0  NOTYPE GLOBAL DEFAULT ABS __data_start
+   13   2: [0-9a-f]*     0  NOTYPE GLOBAL DEFAULT ABS _stack
+    9   2: [0-9a-f]*     0  NOTYPE GLOBAL DEFAULT ABS __end__
+    8   2: [0-9a-f]*     0  NOTYPE GLOBAL DEFAULT ABS __bss_start
     6   2: 00000000     2    FUNC GLOBAL DEFAULT UND lib_func2
-    3   2: 0000830c     0  NOTYPE GLOBAL DEFAULT ABS _bss_end__
-    2   2: 0000027c     0  NOTYPE GLOBAL DEFAULT ABS __exidx_end
+    3   2: [0-9a-f]*     0  NOTYPE GLOBAL DEFAULT ABS _bss_end__
+    2   2: [0-9a-f]*     0  NOTYPE GLOBAL DEFAULT ABS __exidx_end

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