Binutils on arm : pls advice me how to proceed

Binutils on arm : pls advice me how to proceed

[Danny Backx]

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I was (am) interested in contributing to the free/open software world, I
did so in the past on other projects (e.g. www.lesstif.org ).

After I purchased my PDA I noticed two things :
- almost no documentation on how to develop on it (with GNU software)
- forked software: several different distributions of the GNU
  compile/link toolchain, apparently unrelated and incompatible.

I want to help pursue these items. I've been learning, and a lot of
people have pointed me in the right direction for information, or have
helped solve my problems.

However, the reports I've sent in on the binutils list appear to go
nowhere. I have no doubt that I'm doing something wrong.

One of the things I'd like to accomplish is reduce the forking. 

One of the forks I see is between the real binutils and some branches of
it (http://developer.berlios.de/projects/cegcc/ , the pocketpc-*
packages in Debian, the Voxware work
http://win-ce.voxware.com:28575/Development%20Tools/gnuwince.html).

Pedro Alves and I sent some message on the list that indicate where we
think some of the problem areas are.

Clearly, something must be wrong with those messages, as there appears
to be little attention being payed to them.

Can someone help me by telling me what I'm missing ?
Am I sending the wrong information ?
Am I talking to the wrong public ?
Am I boring and should I just shut up ? :-)

Thanks,

	Danny

P.S. After removing the reasons for the forks, there's other things I
can make myself useful with. Documentation, better integration, .. .
-- 
Danny Backx ; danny.backx - at - scarlet.be ; http://danny.backx.info

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Re: Binutils on arm : pls advice me how to proceed

[Daniel Jacobowitz]

On Thu, May 04, 2006 at 07:55:07PM +0200, Danny Backx wrote:
> Pedro Alves and I sent some message on the list that indicate where we
> think some of the problem areas are.
> 
> Clearly, something must be wrong with those messages, as there appears
> to be little attention being payed to them.
> 
> Can someone help me by telling me what I'm missing ?
> Am I sending the wrong information ?
> Am I talking to the wrong public ?
> Am I boring and should I just shut up ? :-)

The maintainers are always busy; it sometimes takes a long time and a
couple of tries to get a response.  Patience is very important.
Fixes for WinCE don't normally get a lot of attention, because there's
a relatively small user base.

FWIW, I skimmed some of the patches that have been sent; #ifdefs
are rarely OK.  Although some are probably needed since the WinCE
loader is so different from typical ARM loaders, it's important to
minimize them, and to figure out (A) what the differences are supposed
to be, and (B) where the most effective place to implement the changes
is.  Another thing that helps to make your changes clear is new
testcases; if there had been enough testcases for the special WinCE
needs, it probably wouldn't have broken.

-- 
Daniel Jacobowitz
CodeSourcery

Re: Binutils on arm : pls advice me how to proceed

[Pedro Alves]

Daniel Jacobowitz wrote:
> On Thu, May 04, 2006 at 07:55:07PM +0200, Danny Backx wrote:
>   
>> Pedro Alves and I sent some message on the list that indicate where we
>> think some of the problem areas are.
>>
>> Clearly, something must be wrong with those messages, as there appears
>> to be little attention being payed to them.
>>
>> Can someone help me by telling me what I'm missing ?
>> Am I sending the wrong information ?
>> Am I talking to the wrong public ?
>> Am I boring and should I just shut up ? :-)
>>     
>
> The maintainers are always busy; it sometimes takes a long time and a
> couple of tries to get a response.  Patience is very important.
>   
I'm patient. :)
> Fixes for WinCE don't normally get a lot of attention, because there's
> a relatively small user base.
>
>   
Yes, I hope that the cegcc project can grow into "the" toolchain for 
wince development with
gnu tools. When I started using arm-wince-* tools, the thing that almost 
kept me off, was the fact that
the user base was so disperse. Some patches here and there, a few other 
places with prebuilt toolchains,
but no central identity, like say, cygwin or mingw.  Well, actually not 
quite true, there was/is GNUWINCE from
Voxware, but at the time I thought it was a dead project.

> FWIW, I skimmed some of the patches that have been sent; #ifdefs
> are rarely OK.  Although some are probably needed since the WinCE
> loader is so different from typical ARM loaders, it's important to
> minimize them, and to figure out (A) what the differences are supposed
> to be, and (B) where the most effective place to implement the changes
> is.  
I have to admit, I don't yet get the full picture of my own changes. I 
based my work on making the head version of binutils
generate the same objects and images as the old (as in one year and a 
half ago) did. I am sure some (as in most) #ifdefs there are in the 
wrong place,
but to my limited knowledge they were the best place I could find that 
would have minimum code changes.
I would love to hear some directions of how to clean them up.

> Another thing that helps to make your changes clear is new
> testcases; if there had been enough testcases for the special WinCE
> needs, it probably wouldn't have broken.
>
>   

Cheers,
Pedro Alves

Re: Binutils on arm : pls advice me how to proceed

[Nick Clifton]

Hi Pedro,


>> The maintainers are always busy;

> I'm patient. :)

   Just to let you know, I have been reading your posts, and Danny's.  I 
have been very busy these last few weeks, and since this is a topic that 
is going to take some thought on my part, I did not want to rush things.

I do have some time set aside next week to look at the problem and your 
patches, so please just hold on a little while longer.

Cheers
   Nick

Re: Binutils on arm : pls advice me how to proceed

[Nick Clifton]

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Hi Pedro, Hi Danny,

   Please accept my apologies in taking so long to reply to your emails. 
  I have now had a chance to go over them and the patches that they 
contained and then seemed quite reasonable to me.  I have applied them 
to my local source tree and checked to see if there were any regressions 
  - there were not.

   Unfortunately I do not have an arm-wince system at my disposal, so I 
cannot check that the (slightly revised) versions of the patches that I 
applied allow working binaries to be created, so please can I ask for 
your help ?

   I am attaching a unified patch which I think contains all of the 
changes that you suggested, along with a little bit of code tidying. 
Please could you try applying them to a set of binutils sources (from 
the mainline of the CVS repository) and testing them to see if they 
produce working binaries ?

   One thing I am quite worried about is whether partial linking will 
work.  (ie using the "ld -r ...." file to create an object file that is 
an amalgam of several other object files).  I suspect that there might 
be problems with the -8 bias to branch relocations, but without a test 
environment I cannot tell for sure.

   Thanks very much for perserving with your work, and assuming that you 
can confirm that the patch works, I will be happy to check it in with 
the ChangeLogs below.

Cheers
   Nick

bfd/ChangeLog
2006-05-10  Pedro Alves  <pedro_alves@portugalmail.pt>

	* coff-arm.c (ARM_26D, ARM_32, ARM_RVA_32, ARM_SECTION,
         ARM_SECREL): Mark WinCE versions of these relocs as partial
	inplace.
	(coff_arm_relocate_section): Adjust addend for WinCE.

gas/ChangeLog
2006-05-10  Pedro Alves  <pedro_alves@portugalmail.pt>

	* config/tc-arm.c (md_pcrel_from_section): Force a bias for	 	relocs 
against external symbols for WinCE targets.
	(md_apply_fix): Likewise.

ld/ChangeLog
2006-05-10  Pedro Alves  <pedro_alves@portugalmail.pt>

	* pe-dll.c (autofilter_symbollist): Add Dllmain, 		
	DllMainCRTStartup, _DllMainCRTStartup and .text.
	(autofilter_liblist): Add libcegcc.
	(autofilter_symbolprefixlist): Add __imp_ and .idata$.
	(generate_reloc): Do not skip sections without a SEC_LOAD flag, 	
	they can still contain relocs that need processing.
	Skip the .idata$6 section.
	(jmp_arm_bytes): New array: Contains byte codes for an ARM jump.
	(make_one): Use the new array.
	(make_import_fixup_entry): Use .idata$2 instead of .idata$3.
	* emultempl/pe.em (MajorSubsystemVersion): Set to 3 for armpe.



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Index: bfd/coff-arm.c
===================================================================
RCS file: /cvs/src/src/bfd/coff-arm.c,v
retrieving revision 1.63
diff -c -3 -p -r1.63 coff-arm.c
*** bfd/coff-arm.c	16 Mar 2006 12:20:15 -0000	1.63
--- bfd/coff-arm.c	10 May 2006 10:05:35 -0000
*************** static reloc_howto_type aoutarm_std_relo
*** 220,226 ****
  	   complain_overflow_dont,
  	   aoutarm_fix_pcrel_26_done,
  	   "ARM_26D",
! 	   FALSE,
  	   0x00ffffff,
  	   0x0,
  	   PCRELOFFSET),
--- 220,226 ----
  	   complain_overflow_dont,
  	   aoutarm_fix_pcrel_26_done,
  	   "ARM_26D",
! 	   TRUE, 	/* partial_inplace.  */
  	   0x00ffffff,
  	   0x0,
  	   PCRELOFFSET),
*************** static reloc_howto_type aoutarm_std_relo
*** 233,239 ****
  	   complain_overflow_bitfield,
  	   coff_arm_reloc,
  	   "ARM_32",
! 	   FALSE,
  	   0xffffffff,
  	   0xffffffff,
  	   PCRELOFFSET),
--- 233,239 ----
  	   complain_overflow_bitfield,
  	   coff_arm_reloc,
  	   "ARM_32",
! 	   TRUE, 	/* partial_inplace.  */
  	   0xffffffff,
  	   0xffffffff,
  	   PCRELOFFSET),
*************** static reloc_howto_type aoutarm_std_relo
*** 246,252 ****
  	   complain_overflow_bitfield,
  	   coff_arm_reloc,
  	   "ARM_RVA32",
! 	   FALSE,
  	   0xffffffff,
  	   0xffffffff,
  	   PCRELOFFSET),
--- 246,252 ----
  	   complain_overflow_bitfield,
  	   coff_arm_reloc,
  	   "ARM_RVA32",
! 	   TRUE, 	/* partial_inplace.  */
  	   0xffffffff,
  	   0xffffffff,
  	   PCRELOFFSET),
*************** static reloc_howto_type aoutarm_std_relo
*** 294,300 ****
  	   complain_overflow_bitfield,
  	   coff_arm_reloc,
  	   "ARM_SECTION",
! 	   FALSE,
  	   0x0000ffff,
  	   0x0000ffff,
  	   PCRELOFFSET),
--- 294,300 ----
  	   complain_overflow_bitfield,
  	   coff_arm_reloc,
  	   "ARM_SECTION",
! 	   TRUE, 	/* partial_inplace.  */
  	   0x0000ffff,
  	   0x0000ffff,
  	   PCRELOFFSET),
*************** static reloc_howto_type aoutarm_std_relo
*** 307,313 ****
  	   complain_overflow_bitfield,
  	   coff_arm_reloc,
  	   "ARM_SECREL",
! 	   FALSE,
  	   0xffffffff,
  	   0xffffffff,
  	   PCRELOFFSET),
--- 307,313 ----
  	   complain_overflow_bitfield,
  	   coff_arm_reloc,
  	   "ARM_SECREL",
! 	   TRUE, 	/* partial_inplace.  */
  	   0xffffffff,
  	   0xffffffff,
  	   PCRELOFFSET),
*************** coff_arm_relocate_section (bfd *output_b
*** 1209,1220 ****
                      generation of bl's instruction offset.  */
            addend -= 8;
  #endif
!           howto = &fake_arm26_reloc;
          }
  
  #ifdef ARM_WINCE
        /* MS ARM-CE makes the reloc relative to the opcode's pc, not
  	 the next opcode's pc, so is off by one.  */
  #endif
  
        /* If we are doing a relocatable link, then we can just ignore
--- 1209,1222 ----
                      generation of bl's instruction offset.  */
            addend -= 8;
  #endif
!           howto = & fake_arm26_reloc;
          }
  
  #ifdef ARM_WINCE
        /* MS ARM-CE makes the reloc relative to the opcode's pc, not
  	 the next opcode's pc, so is off by one.  */
+       if (howto->pc_relative && !info->relocatable)
+ 	addend -= 8;
  #endif
  
        /* If we are doing a relocatable link, then we can just ignore
Index: gas/config/tc-arm.c
===================================================================
RCS file: /cvs/src/src/gas/config/tc-arm.c,v
retrieving revision 1.267
diff -c -3 -p -r1.267 tc-arm.c
*** gas/config/tc-arm.c	9 May 2006 15:13:22 -0000	1.267
--- gas/config/tc-arm.c	10 May 2006 10:05:39 -0000
*************** md_pcrel_from_section (fixS * fixP, segT
*** 15561,15570 ****
  
    /* If this is pc-relative and we are going to emit a relocation
       then we just want to put out any pipeline compensation that the linker
!      will need.  Otherwise we want to use the calculated base.  */
    if (fixP->fx_pcrel 
        && ((fixP->fx_addsy && S_GET_SEGMENT (fixP->fx_addsy) != seg)
! 	  || arm_force_relocation (fixP)))
      base = 0;
  
    switch (fixP->fx_r_type)
--- 15561,15576 ----
  
    /* If this is pc-relative and we are going to emit a relocation
       then we just want to put out any pipeline compensation that the linker
!      will need.  Otherwise we want to use the calculated base.
!      For WinCE we skip the bias for externals as well, since this
!      is how the MS ARM-CE assembler behaves and we want to be compatible.  */
    if (fixP->fx_pcrel 
        && ((fixP->fx_addsy && S_GET_SEGMENT (fixP->fx_addsy) != seg)
! 	  || (arm_force_relocation (fixP)
! #ifdef TE_WINCE
! 	      && !S_IS_EXTERNAL (fixP->fx_addsy)
! #endif
! 	      )))
      base = 0;
  
    switch (fixP->fx_r_type)
*************** md_pcrel_from_section (fixS * fixP, segT
*** 15601,15606 ****
--- 15607,15623 ----
      case BFD_RELOC_ARM_PCREL_BLX:
      case BFD_RELOC_ARM_PLT32:
  #ifdef TE_WINCE
+       /* When handling fixups immediately, because we have already 
+          discovered the value of a symbol, or the address of the frag involved
+ 	 we must account for the offset by +8, as the OS loader will never see the reloc.
+          see fixup_segment() in write.c
+          The S_IS_EXTERNAL test handles the case of global symbols.
+          Those need the calculated base, not just the pipe compensation the linker will need.  */
+       if (fixP->fx_pcrel
+ 	  && fixP->fx_addsy != NULL
+ 	  && (S_GET_SEGMENT (fixP->fx_addsy) == seg)
+ 	  && (S_IS_EXTERNAL (fixP->fx_addsy) || !arm_force_relocation (fixP)))
+ 	return base + 8;
        return base;
  #else
        return base + 8;
*************** md_apply_fix (fixS *	fixP,
*** 16511,16518 ****
--- 16528,16542 ----
      case BFD_RELOC_ARM_ROSEGREL32:
      case BFD_RELOC_ARM_SBREL32:
      case BFD_RELOC_32_PCREL:
+ #ifdef TE_WINCE
+       if (!fixP->fx_done && seg->use_rela_p)
+         break;
+       if (fixP->fx_done || fixP->fx_pcrel)
+         md_number_to_chars (buf, value, 4);
+ #else
        if (fixP->fx_done || !seg->use_rela_p)
  	md_number_to_chars (buf, value, 4);
+ #endif
        break;
  
  #ifdef OBJ_ELF
Index: ld/pe-dll.c
===================================================================
RCS file: /cvs/src/src/ld/pe-dll.c,v
retrieving revision 1.83
diff -c -3 -p -r1.83 pe-dll.c
*** ld/pe-dll.c	31 Jan 2006 22:08:14 -0000	1.83
--- ld/pe-dll.c	10 May 2006 10:05:40 -0000
***************
*** 1,5 ****
  /* Routines to help build PEI-format DLLs (Win32 etc)
!    Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
     Free Software Foundation, Inc.
     Written by DJ Delorie <dj@cygnus.com>
  
--- 1,5 ----
  /* Routines to help build PEI-format DLLs (Win32 etc)
!    Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
     Free Software Foundation, Inc.
     Written by DJ Delorie <dj@cygnus.com>
  
***************
*** 95,101 ****
      For each reference of data symbol to be imported from DLL (to set of which
      belong symbols with name <sym>, if __imp_<sym> is found in implib), the
      import fixup entry is generated. That entry is of type
!     IMAGE_IMPORT_DESCRIPTOR and stored in .idata$3 subsection. Each
      fixup entry contains pointer to symbol's address within .text section
      (marked with __fuN_<sym> symbol, where N is integer), pointer to DLL name
      (so, DLL name is referenced by multiple entries), and pointer to symbol
--- 95,101 ----
      For each reference of data symbol to be imported from DLL (to set of which
      belong symbols with name <sym>, if __imp_<sym> is found in implib), the
      import fixup entry is generated. That entry is of type
!     IMAGE_IMPORT_DESCRIPTOR and stored in .idata$2 subsection. Each
      fixup entry contains pointer to symbol's address within .text section
      (marked with __fuN_<sym> symbol, where N is integer), pointer to DLL name
      (so, DLL name is referenced by multiple entries), and pointer to symbol
*************** static pe_details_type *pe_details;
*** 216,221 ****
--- 216,224 ----
  
  static autofilter_entry_type autofilter_symbollist[] =
  {
+   { "DllMain", 7 },
+   { "DllMainCRTStartup", 17 },
+   { "_DllMainCRTStartup", 18 },
    { "DllMain@12", 10 },
    { "DllEntryPoint@0", 15 },
    { "DllMainCRTStartup@12", 20 },
*************** static autofilter_entry_type autofilter_
*** 226,237 ****
--- 229,242 ----
    { "_pei386_runtime_relocator", 25 },
    { "do_pseudo_reloc", 15 },
    { "cygwin_crt0", 11 },
+   { ".text", 5 },
    { NULL, 0 }
  };
  
  /* Do not specify library suffix explicitly, to allow for dllized versions.  */
  static autofilter_entry_type autofilter_liblist[] =
  {
+   { "libcegcc", 8 },
    { "libcygwin", 9 },
    { "libgcc", 6 },
    { "libstdc++", 9 },
*************** static autofilter_entry_type autofilter_
*** 261,269 ****
  
  static autofilter_entry_type autofilter_symbolprefixlist[] =
  {
!   /*  { "__imp_", 6 }, */
    /* Do __imp_ explicitly to save time.  */
    { "__rtti_", 7 },
    /* Don't re-export auto-imported symbols.  */
    { "_nm_", 4 },
    { "__builtin_", 10 },
--- 266,275 ----
  
  static autofilter_entry_type autofilter_symbolprefixlist[] =
  {
!   { "__imp_", 6 },
    /* Do __imp_ explicitly to save time.  */
    { "__rtti_", 7 },
+   { ".idata$", 7 },
    /* Don't re-export auto-imported symbols.  */
    { "_nm_", 4 },
    { "__builtin_", 10 },
*************** generate_reloc (bfd *abfd, struct bfd_li
*** 1131,1138 ****
--- 1137,1149 ----
  	  int nsyms, symsize;
  
  	  /* If it's not loaded, we don't need to relocate it this way.  */
+ #if 0	  /* Some toolchains can generate .data sections without a SEC_LOAD flag but with relocs.  */
  	  if (!(s->output_section->flags & SEC_LOAD))
  	    continue;
+ #endif
+ 	  /* Huh ?  */
+ 	  if (strncmp (bfd_get_section_name (abfd, s), ".idata",6) == 0)
+ 	    continue;
  
  	  /* I don't know why there would be a reloc for these, but I've
  	     seen it happen - DJ  */
*************** static unsigned char jmp_mips_bytes[] =
*** 1780,1785 ****
--- 1791,1804 ----
    0x08, 0x00, 0x00, 0x01,  0x00, 0x00, 0x00, 0x00
  };
  
+ static unsigned char jmp_arm_bytes[] =
+ {
+   0x00, 0xc0, 0x9f, 0xe5,	/* ldr  ip, [pc] */
+   0x00, 0xf0, 0x9c, 0xe5,	/* ldr  pc, [ip] */
+   0,    0,    0,    0
+ };
+ 
+ 
  static bfd *
  make_one (def_file_export *exp, bfd *parent)
  {
*************** make_one (def_file_export *exp, bfd *par
*** 1805,1810 ****
--- 1824,1833 ----
        jmp_bytes = jmp_mips_bytes;
        jmp_byte_count = sizeof (jmp_mips_bytes);
        break;
+     case PE_ARCH_arm:
+       jmp_bytes = jmp_arm_bytes;
+       jmp_byte_count = sizeof (jmp_arm_bytes);
+       break;
      default:
        abort ();
      }
*************** make_one (def_file_export *exp, bfd *par
*** 1878,1883 ****
--- 1901,1909 ----
  	  quick_reloc (abfd, 0, BFD_RELOC_LO16, 0); /* MIPS_R_PAIR */
  	  quick_reloc (abfd, 4, BFD_RELOC_LO16, 2);
  	  break;
+ 	case PE_ARCH_arm:
+ 	  quick_reloc (abfd, 8, BFD_RELOC_32, 2);
+ 	  break;
  	default:
  	  abort ();
  	}
*************** make_import_fixup_mark (arelent *rel)
*** 2048,2054 ****
    return fixup_name;
  }
  
! /*	.section	.idata$3
    	.rva		__nm_thnk_SYM (singleton thunk with name of func)
   	.long		0
   	.long		0
--- 2074,2080 ----
    return fixup_name;
  }
  
! /*	.section	.idata$2
    	.rva		__nm_thnk_SYM (singleton thunk with name of func)
   	.long		0
   	.long		0
*************** make_import_fixup_entry (const char *nam
*** 2061,2068 ****
  			 const char *dll_symname,
  			 bfd *parent)
  {
!   asection *id3;
!   unsigned char *d3;
    char *oname;
    bfd *abfd;
  
--- 2087,2094 ----
  			 const char *dll_symname,
  			 bfd *parent)
  {
!   asection *id2;
!   unsigned char *d2;
    char *oname;
    bfd *abfd;
  
*************** make_import_fixup_entry (const char *nam
*** 2079,2103 ****
  
    symptr = 0;
    symtab = xmalloc (6 * sizeof (asymbol *));
!   id3 = quick_section (abfd, ".idata$3", SEC_HAS_CONTENTS, 2);
  
    quick_symbol (abfd, U ("_nm_thnk_"), name, "", UNDSEC, BSF_GLOBAL, 0);
    quick_symbol (abfd, U (""), dll_symname, "_iname", UNDSEC, BSF_GLOBAL, 0);
    quick_symbol (abfd, "", fixup_name, "", UNDSEC, BSF_GLOBAL, 0);
  
!   bfd_set_section_size (abfd, id3, 20);
!   d3 = xmalloc (20);
!   id3->contents = d3;
!   memset (d3, 0, 20);
  
    quick_reloc (abfd, 0, BFD_RELOC_RVA, 1);
    quick_reloc (abfd, 12, BFD_RELOC_RVA, 2);
    quick_reloc (abfd, 16, BFD_RELOC_RVA, 3);
!   save_relocs (id3);
  
    bfd_set_symtab (abfd, symtab, symptr);
  
!   bfd_set_section_contents (abfd, id3, d3, 0, 20);
  
    bfd_make_readable (abfd);
    return abfd;
--- 2105,2129 ----
  
    symptr = 0;
    symtab = xmalloc (6 * sizeof (asymbol *));
!   id2 = quick_section (abfd, ".idata$2", SEC_HAS_CONTENTS, 2);
  
    quick_symbol (abfd, U ("_nm_thnk_"), name, "", UNDSEC, BSF_GLOBAL, 0);
    quick_symbol (abfd, U (""), dll_symname, "_iname", UNDSEC, BSF_GLOBAL, 0);
    quick_symbol (abfd, "", fixup_name, "", UNDSEC, BSF_GLOBAL, 0);
  
!   bfd_set_section_size (abfd, id2, 20);
!   d2 = xmalloc (20);
!   id2->contents = d2;
!   memset (d2, 0, 20);
  
    quick_reloc (abfd, 0, BFD_RELOC_RVA, 1);
    quick_reloc (abfd, 12, BFD_RELOC_RVA, 2);
    quick_reloc (abfd, 16, BFD_RELOC_RVA, 3);
!   save_relocs (id2);
  
    bfd_set_symtab (abfd, symtab, symptr);
  
!   bfd_set_section_contents (abfd, id2, d2, 0, 20);
  
    bfd_make_readable (abfd);
    return abfd;
Index: ld/emultempl/pe.em
===================================================================
RCS file: /cvs/src/src/ld/emultempl/pe.em,v
retrieving revision 1.113
diff -c -3 -p -r1.113 pe.em
*** ld/emultempl/pe.em	24 Nov 2005 06:02:08 -0000	1.113
--- ld/emultempl/pe.em	10 May 2006 10:05:40 -0000
*************** static definfo init[] =
*** 283,289 ****
    D(MajorImageVersion,"__major_image_version__", 1),
    D(MinorImageVersion,"__minor_image_version__", 0),
  #ifdef TARGET_IS_armpe
!   D(MajorSubsystemVersion,"__major_subsystem_version__", 2),
  #else
    D(MajorSubsystemVersion,"__major_subsystem_version__", 4),
  #endif
--- 283,289 ----
    D(MajorImageVersion,"__major_image_version__", 1),
    D(MinorImageVersion,"__minor_image_version__", 0),
  #ifdef TARGET_IS_armpe
!   D(MajorSubsystemVersion,"__major_subsystem_version__", 3),
  #else
    D(MajorSubsystemVersion,"__major_subsystem_version__", 4),
  #endif

Re: Binutils on arm : pls advice me how to proceed

[Danny Backx]

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I am having problems applying them to the current CVS version. Almost
all the diffs fail to apply, I've copied an excerpt below. Am I using
the wrong version ?

|RCS file: /cvs/src/src/bfd/coff-arm.c,v
|retrieving revision 1.63
|diff -c -3 -p -r1.63 coff-arm.c
|*** bfd/coff-arm.c     16 Mar 2006 12:20:15 -0000      1.63
|--- bfd/coff-arm.c     10 May 2006 10:05:35 -0000
--------------------------
File to patch: bfd/coff-arm.c
patching file bfd/coff-arm.c
Hunk #1 FAILED at 220.
Hunk #2 FAILED at 233.
Hunk #3 FAILED at 246.
Hunk #4 FAILED at 294.
Hunk #5 FAILED at 307.
Hunk #6 FAILED at 1209.
6 out of 6 hunks FAILED -- saving rejects to file bfd/coff-arm.c.rej

The versions of the relevant files I see in CVS are :

bfd/coff-arm.c          1.63    2006/03/16
gas/config/tc-arm.c     1.267   2006/05/09
ld/pe-dll.c             1.83    2006/01/31
ld/emultempl/pe.em      1.113   2005/11/24

I also tried your patch against binutils-2.16.1 - that only produced
patch failures in one file (tc-arm.c).

	Danny

On Wed, 2006-05-10 at 11:48 +0100, Nick Clifton wrote:
> Hi Pedro, Hi Danny,
> 
>    Please accept my apologies in taking so long to reply to your emails. 
>   I have now had a chance to go over them and the patches that they 
> contained and then seemed quite reasonable to me.  I have applied them 
> to my local source tree and checked to see if there were any regressions 
>   - there were not.
> 
>    Unfortunately I do not have an arm-wince system at my disposal, so I 
> cannot check that the (slightly revised) versions of the patches that I 
> applied allow working binaries to be created, so please can I ask for 
> your help ?
> 
>    I am attaching a unified patch which I think contains all of the 
> changes that you suggested, along with a little bit of code tidying. 
> Please could you try applying them to a set of binutils sources (from 
> the mainline of the CVS repository) and testing them to see if they 
> produce working binaries ?
> 
>    One thing I am quite worried about is whether partial linking will 
> work.  (ie using the "ld -r ...." file to create an object file that is 
> an amalgam of several other object files).  I suspect that there might 
> be problems with the -8 bias to branch relocations, but without a test 
> environment I cannot tell for sure.
> 
>    Thanks very much for perserving with your work, and assuming that you 
> can confirm that the patch works, I will be happy to check it in with 
> the ChangeLogs below.
> 
> Cheers
>    Nick
> 
> bfd/ChangeLog
> 2006-05-10  Pedro Alves  <pedro_alves@portugalmail.pt>
> 
> 	* coff-arm.c (ARM_26D, ARM_32, ARM_RVA_32, ARM_SECTION,
>          ARM_SECREL): Mark WinCE versions of these relocs as partial
> 	inplace.
> 	(coff_arm_relocate_section): Adjust addend for WinCE.
> 
> gas/ChangeLog
> 2006-05-10  Pedro Alves  <pedro_alves@portugalmail.pt>
> 
> 	* config/tc-arm.c (md_pcrel_from_section): Force a bias for	 	relocs 
> against external symbols for WinCE targets.
> 	(md_apply_fix): Likewise.
> 
> ld/ChangeLog
> 2006-05-10  Pedro Alves  <pedro_alves@portugalmail.pt>
> 
> 	* pe-dll.c (autofilter_symbollist): Add Dllmain, 		
> 	DllMainCRTStartup, _DllMainCRTStartup and .text.
> 	(autofilter_liblist): Add libcegcc.
> 	(autofilter_symbolprefixlist): Add __imp_ and .idata$.
> 	(generate_reloc): Do not skip sections without a SEC_LOAD flag, 	
> 	they can still contain relocs that need processing.
> 	Skip the .idata$6 section.
> 	(jmp_arm_bytes): New array: Contains byte codes for an ARM jump.
> 	(make_one): Use the new array.
> 	(make_import_fixup_entry): Use .idata$2 instead of .idata$3.
> 	* emultempl/pe.em (MajorSubsystemVersion): Set to 3 for armpe.
> 
> 
-- 
Danny Backx ; danny.backx - at - scarlet.be ; http://danny.backx.info

[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 191 bytes --]

Re: Binutils on arm : pls advice me how to proceed

[Pedro Alves]

Danny Backx wrote:
> I am having problems applying them to the current CVS version. Almost
> all the diffs fail to apply, I've copied an excerpt below. Am I using
> the wrong version ?
>
>   
Did you get a warning about the files not being found? If so, check that 
you are applying the patch in the correct directory,
or use the -p option. You can always --dry-run before applying the patch.

> I also tried your patch against binutils-2.16.1 - that only produced
> patch failures in one file (tc-arm.c).
>
>   
> 	Danny
>
> On Wed, 2006-05-10 at 11:48 +0100, Nick Clifton wrote:
>   
>> Hi Pedro, Hi Danny,
>>
>>    Please accept my apologies in taking so long to reply to your emails. 
>>   I have now had a chance to go over them and the patches that they 
>> contained and then seemed quite reasonable to me.  I have applied them 
>> to my local source tree and checked to see if there were any regressions 
>>   - there were not.
>>
>>    Unfortunately I do not have an arm-wince system at my disposal, so I 
>> cannot check that the (slightly revised) versions of the patches that I 
>> applied allow working binaries to be created, so please can I ask for 
>> your help ?
>>
>>    I am attaching a unified patch which I think contains all of the 
>> changes that you suggested, along with a little bit of code tidying. 
>> Please could you try applying them to a set of binutils sources (from 
>> the mainline of the CVS repository) and testing them to see if they 
>> produce working binaries ?
>>
>>    One thing I am quite worried about is whether partial linking will 
>> work.  (ie using the "ld -r ...." file to create an object file that is 
>> an amalgam of several other object files).  I suspect that there might 
>> be problems with the -8 bias to branch relocations, but without a test 
>> environment I cannot tell for sure.
>>
>>    Thanks very much for perserving with your work, and assuming that you 
>> can confirm that the patch works, I will be happy to check it in with 
>> the ChangeLogs below.
>>
>> Cheers
>>    Nick
>>
>> bfd/ChangeLog
>> 2006-05-10  Pedro Alves  <pedro_alves@portugalmail.pt>
>>
>> 	* coff-arm.c (ARM_26D, ARM_32, ARM_RVA_32, ARM_SECTION,
>>          ARM_SECREL): Mark WinCE versions of these relocs as partial
>> 	inplace.
>> 	(coff_arm_relocate_section): Adjust addend for WinCE.
>>
>> gas/ChangeLog
>> 2006-05-10  Pedro Alves  <pedro_alves@portugalmail.pt>
>>
>> 	* config/tc-arm.c (md_pcrel_from_section): Force a bias for	 	relocs 
>> against external symbols for WinCE targets.
>> 	(md_apply_fix): Likewise.
>>
>> ld/ChangeLog
>> 2006-05-10  Pedro Alves  <pedro_alves@portugalmail.pt>
>>
>> 	* pe-dll.c (autofilter_symbollist): Add Dllmain, 		
>> 	DllMainCRTStartup, _DllMainCRTStartup and .text.
>> 	(autofilter_liblist): Add libcegcc.
>> 	(autofilter_symbolprefixlist): Add __imp_ and .idata$.
>> 	(generate_reloc): Do not skip sections without a SEC_LOAD flag, 	
>> 	they can still contain relocs that need processing.
>> 	Skip the .idata$6 section.
>> 	(jmp_arm_bytes): New array: Contains byte codes for an ARM jump.
>> 	(make_one): Use the new array.
>> 	(make_import_fixup_entry): Use .idata$2 instead of .idata$3.
>> 	* emultempl/pe.em (MajorSubsystemVersion): Set to 3 for armpe.
>>
>>
>>     

Re: Binutils on arm : pls advice me how to proceed

[Pedro Alves]

Nick Clifton wrote:
> Hi Pedro, Hi Danny,
>
>   Please accept my apologies in taking so long to reply to your 
> emails.  I have now had a chance to go over them and the patches that 
> they contained and then seemed quite reasonable to me.  I have applied 
> them to my local source tree and checked to see if there were any 
> regressions  - there were not.
>
>   Unfortunately I do not have an arm-wince system at my disposal, so I 
> cannot check that the (slightly revised) versions of the patches that 
> I applied allow working binaries to be created, so please can I ask 
> for your help ?
>
>   I am attaching a unified patch which I think contains all of the 
> changes that you suggested, along with a little bit of code tidying. 
> Please could you try applying them to a set of binutils sources (from 
> the mainline of the CVS repository) and testing them to see if they 
> produce working binaries ?
>
 >  One thing I am quite worried about is whether partial linking will 
work.  (ie using the "ld -r ...." file to create an object file that is 
an amalgam of several other object files).  I suspect that there might 
be problems with the -8 bias to branch relocations, but without a test 
environment I cannot tell for sure.

Made a small test:
Three objects (from main.cpp main2.cpp main3.cpp), one function each, 
each calls the other in chain, and both all -lc functions (printf).

Linked with:

${OUTFILE}.exe : $(OBJECTS) Makefile
    $(CXX) -v main.o main2.o -nostdlib -r -o partial.o
    $(CXX) -v partial.o main3.o -static $(LDFLAGS) -o ${OUTFILE}.exe

Tested with runtime as dll and with -static.
And it ran ok.

>
>   Thanks very much for perserving with your work, and assuming that 
> you can confirm that the patch works, I will be happy to check it in 
> with the ChangeLogs below.
>
Confirmed. Tested with the tests I sent before, and after rebuilding the 
full cegcc toolchain, with some c++ tests apps I have.
Many thanks for taking the time to clean and review the patches, and for 
taking the time to write the ChangeLog.

Cheers,
Pedro Alves

Re: Binutils on arm : pls advice me how to proceed

[Nick Clifton]

Hi Pedro,

> Made a small test:
> Three objects (from main.cpp main2.cpp main3.cpp), one function each, 
> each calls the other in chain, and both all -lc functions (printf).
> 
> Linked with:
> 
> ${OUTFILE}.exe : $(OBJECTS) Makefile
>    $(CXX) -v main.o main2.o -nostdlib -r -o partial.o
>    $(CXX) -v partial.o main3.o -static $(LDFLAGS) -o ${OUTFILE}.exe
> 
> Tested with runtime as dll and with -static.
> And it ran ok.

Excellent - thanks for doing that.

I have now checked in your patches to the mainline sources.

Cheers
   Nick

Re: Binutils on arm : pls advice me how to proceed

[Nick Clifton]

Hi Danny,

> I am having problems applying them to the current CVS version. Almost
> all the diffs fail to apply, I've copied an excerpt below. Am I using
> the wrong version ?
> 
> |RCS file: /cvs/src/src/bfd/coff-arm.c,v
> |retrieving revision 1.63

No, that looks correct.

> |diff -c -3 -p -r1.63 coff-arm.c
> |*** bfd/coff-arm.c     16 Mar 2006 12:20:15 -0000      1.63
> |--- bfd/coff-arm.c     10 May 2006 10:05:35 -0000
> --------------------------
> File to patch: bfd/coff-arm.c
> patching file bfd/coff-arm.c
> Hunk #1 FAILED at 220.

My guess is that either my mailer mangled the revised patch when I 
posted it, or your mailer corrupted it when you received it.  Most 
likely this will be a CR vs CR/LF problem.  I was going to attached a 
zip'ed up version of the patch for you to try, but since I have now 
applied the patch to the sources, you can just run a "cvs update" to get 
the changes...

Cheers
   Nick