patches/binutils/2.20/170-warn-textrel.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Thu Dec 23 20:43:32 2010 +0100 (2010-12-23)
changeset 2307 2efd46963086
parent 1614 3f76cdbceb6e
permissions -rw-r--r--
buildtools: move to working directory

There is absolutely *no* reason for the buildtools (wrappers to gcc, g++,
as, ld... for the local machine) to be in the toolchain directory. Moreover,
they are removed after the build completes.

Move them out of the toolchain directory, and into the build directory (but
yet the part specific to the current toolchain). This means we no longer
need to explicitly remove them either, BTW, but we need to save/restore them
for the restart feature.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
     1 textrels are bad for forcing copy-on-write (this affects everyone),
     2 and for security/runtime code generation, this affects security ppl.
     3 But in either case, it doesn't matter who needs textrels, it's
     4 the very fact that they're needed at all.
     5 
     6 2006-06-10  Ned Ludd  <solar@gentoo.org>, Mike Frysinger <vapier@gentoo.org>
     7 
     8 	* bfd/elflink.c (bfd_elf_final_link): Check all objects for TEXTRELs.
     9 	* ld/ldmain.c (main): Change textrel warning default to true.
    10 	* ld/testsuite/lib/ld-lib.exp (default_ld_simple_link): Scrub TEXTREL
    11 	warnings from ld output.
    12 
    13 --- binutils/bfd/elflink.c
    14 +++ binutils/bfd/elflink.c
    15 @@ -8652,14 +8652,12 @@
    16  	goto error_return;
    17  
    18        /* Check for DT_TEXTREL (late, in case the backend removes it).  */
    19 -      if (info->warn_shared_textrel && info->shared)
    20 +      o = bfd_get_section_by_name (dynobj, ".dynamic");
    21 +      if (info->warn_shared_textrel && o != NULL)
    22  	{
    23  	  bfd_byte *dyncon, *dynconend;
    24  
    25  	  /* Fix up .dynamic entries.  */
    26 -	  o = bfd_get_section_by_name (dynobj, ".dynamic");
    27 -	  BFD_ASSERT (o != NULL);
    28 -
    29  	  dyncon = o->contents;
    30  	  dynconend = o->contents + o->size;
    31  	  for (; dyncon < dynconend; dyncon += bed->s->sizeof_dyn)
    32 @@ -8702,7 +8702,7 @@ bfd_elf_final_link (bfd *abfd, struct bf
    33  	      if (dyn.d_tag == DT_TEXTREL)
    34  		{
    35  		 info->callbacks->einfo
    36 -		    (_("%P: warning: creating a DT_TEXTREL in a shared object.\n"));
    37 +		    (_("%P: warning: creating a DT_TEXTREL in object.\n"));
    38  		  break;
    39  		}
    40  	    }
    41 --- binutils/ld/ldmain.c
    42 +++ binutils/ld/ldmain.c
    43 @@ -282,2 +282,3 @@ main (int argc, char **argv)
    44    link_info.spare_dynamic_tags = 5;
    45 +  link_info.warn_shared_textrel = TRUE;
    46    link_info.sharable_sections = FALSE;
    47 --- binutils/ld/testsuite/lib/ld-lib.exp
    48 +++ binutils/ld/testsuite/lib/ld-lib.exp
    49 @@ -181,6 +181,10 @@ proc default_ld_simple_link { ld target 
    50      # symbol, since the default linker script might use ENTRY.
    51      regsub -all "(^|\n)(\[^\n\]*: warning: cannot find entry symbol\[^\n\]*\n?)" $exec_output "\\1" exec_output
    52  
    53 +    # Gentoo tweak:
    54 +    # We want to ignore TEXTREL warnings since we force enable them by default
    55 +    regsub -all "^lt-ld-new: warning: creating a DT_TEXTREL in object\." $exec_output "\\1" exec_output
    56 +
    57      if [string match "" $exec_output] then {
    58  	return 1
    59      } else {