[Bug binutils/28867] Mingw to generate bogus.o on French locale

[eric.pouech at orange dot fr]

https://sourceware.org/bugzilla/show_bug.cgi?id=28867

--- Comment #8 from Eric Pouech <eric.pouech at orange dot fr> ---
Hi Nick,

I've tried it locally as well, but as you, without much success... ie no error
generated from re-assembling the fail.s file

the exact command line is:

/usr/lib/gcc/i686-w64-mingw32/11.2.1/../../../../i686-w64-mingw32/bin/as -v -I
dlls/dxdiagn -I /home/eric/work/wine-format/dlls/dxdiagn -I include -I
/home/eric/work/wine-format/include -I
/home/eric/work/wine-format/include/msvcrt --gdwarf-4 -o
dlls/dxdiagn/provider.cross.o /tmp/<XXXX>.s

I tried to move around the dev tree (before the dates I opened the bug), but no
modif in the command line

trying to compare the two (the bogus fail.o, and the provider.cross.o) files:

fail.o:     file format pe-i386

Sections:
Idx Name          Size      VMA       LMA       File off  Algn
  0 .text         000050b0  00000000  00000000  0000021c  2**4
                  CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
  1 .data         00000010  00000000  00000000  000052cc  2**2
                  CONTENTS, ALLOC, LOAD, DATA
  2 .bss          00000000  00000000  00000000  00000000  2**2
                  ALLOC
  3 .rdata        00001f40  00000000  00000000  000052dc  2**5
                  CONTENTS, ALLOC, LOAD, RELOC, READONLY, DATA
  4 .debug_info   0001f071  00000000  00000000  0000721c  2**0
                  CONTENTS, RELOC, READONLY, DEBUGGING
  5 .debug_abbrev 00000957  00000000  00000000  0002628d  2**0
                  CONTENTS, READONLY, DEBUGGING
  6 .debug_loc    00009e70  00000000  00000000  00026be4  2**0
                  CONTENTS, RELOC, READONLY, DEBUGGING
  7 .debug_aranges 00000020  00000000  00000000  00030a54  2**0
                  CONTENTS, RELOC, READONLY, DEBUGGING
  8 .debug_ranges 000022d8  00000000  00000000  00030a74  2**0
                  CONTENTS, READONLY, DEBUGGING
  9 .debug_line   00006a00  00000000  00000000  00032d4c  2**0
                  CONTENTS, RELOC, READONLY, DEBUGGING
 10 .debug_str    00000d9d  00000000  00000000  0003974c  2**0
                  CONTENTS, READONLY, DEBUGGING
 11 .rdata$zzz    00000038  00000000  00000000  0003a4e9  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
 12 .eh_frame     00000614  00000000  00000000  0003a521  2**2
                  CONTENTS, ALLOC, LOAD, RELOC, READONLY, DATA

[eric:~/work/wine-format/build32/dlls/dxdiagn]$ LANG=C objdump -h
provider.cross.o 

provider.cross.o:     file format pe-i386

Sections:
Idx Name          Size      VMA       LMA       File off  Algn
  0 .text         000050b0  00000000  00000000  0000021c  2**4
                  CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
  1 .data         00000010  00000000  00000000  000052cc  2**2
                  CONTENTS, ALLOC, LOAD, DATA
  2 .bss          00000000  00000000  00000000  00000000  2**2
                  ALLOC
  3 .rdata        00001f40  00000000  00000000  000052dc  2**5
                  CONTENTS, ALLOC, LOAD, RELOC, READONLY, DATA
  4 .debug_info   0001f073  00000000  00000000  0000721c  2**0
                  CONTENTS, RELOC, READONLY, DEBUGGING
  5 .debug_abbrev 00000967  00000000  00000000  0002628f  2**0
                  CONTENTS, READONLY, DEBUGGING
  6 .debug_loc    00009e70  00000000  00000000  00026bf6  2**0
                  CONTENTS, RELOC, READONLY, DEBUGGING
  7 .debug_aranges 00000020  00000000  00000000  00030a66  2**0
                  CONTENTS, RELOC, READONLY, DEBUGGING
  8 .debug_ranges 000022d8  00000000  00000000  00030a86  2**0
                  CONTENTS, READONLY, DEBUGGING
  9 .debug_line   00006b89  00000000  00000000  00032d5e  2**0
                  CONTENTS, RELOC, READONLY, DEBUGGING
 10 .debug_str    00000d9d  00000000  00000000  000398e7  2**0
                  CONTENTS, READONLY, DEBUGGING
 11 .rdata$zzz    00000038  00000000  00000000  0003a684  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
 12 .eh_frame     00000614  00000000  00000000  0003a6bc  2**2
                  CONTENTS, ALLOC, LOAD, RELOC, READONLY, DATA

so what first changes is the .debug_* sections... and looking a bit into them, 
objdump -W for the two .o files, and diff -u gives (small excerpt):
@@ -90,7 +90,7 @@
     <1fa>   DW_AT_name        : LPVOID
     <201>   DW_AT_decl_file   : 15
     <202>   DW_AT_decl_line   : 247
-    <203>   DW_AT_decl_column : 49
+    <203>   DW_AT_decl_column : 15
     <204>   DW_AT_type        : <0x208>
  <1><208>: Abbrev Number: 128 (DW_TAG_pointer_type)
     <20a>   DW_AT_byte_size   : 4

to summarize the rest of the diff:
- same evolution on most of the DIEs which appear with a modified column
- a couple of DIE:s which require a different abbrev as column cannot be stored
in same dwarf's integer (data1) => which generate the change in size of the
.debug* sections, some DIEs' offset changes...
- I haven't looked further for potentially other differences

just to say I don't grasp where this modification in dwarf's column comes from
(AFAICT fail.s has column information which is consistent with fail.o)

I have no evidence that this variation in the .o files has any relationship
with the failure (or hasn't)... but since we can't grasp anything serious, it
may be worth checking ;-)

maybe, it does ring some bell to you?


A+

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