Bug 20528 - ld -r doesn't handle SHF_EXCLUDE section properly
Summary: ld -r doesn't handle SHF_EXCLUDE section properly
Status: RESOLVED FIXED
Alias: None
Product: binutils
Classification: Unclassified
Component: ld (show other bugs)
Version: 2.28
: P2 normal
Target Milestone: 2.28
Assignee: Not yet assigned to anyone
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2016-08-26 21:29 UTC by H.J. Lu
Modified: 2016-10-11 12:53 UTC (History)
1 user (show)

See Also:
Host:
Target:
Build:
Last reconfirmed:


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Description H.J. Lu 2016-08-26 21:29:57 UTC
[hjl@gnu-6 exclude-1]$ cat x.s
        .text
        .section        .text.startup,"ax",%progbits
        .globl  main
        .type   main, %function
main:
	.byte 0
[hjl@gnu-6 exclude-1]$ cat y.s
        .text
        .section        .text.startup,"axe",%progbits
        .globl  main1
        .type   main1, %function
main1:
	.byte 0
[hjl@gnu-6 exclude-1]$ make LD=ld y
gcc -c  -o y.o y.s
gcc -c  -o x.o x.s
ld -r -o y y.o x.o
[hjl@gnu-6 exclude-1]$ readelf -SW y
There are 8 section headers, starting at offset 0x138:

Section Headers:
  [Nr] Name              Type            Address          Off    Size   ES Flg Lk Inf Al
  [ 0]                   NULL            0000000000000000 000000 000000 00      0   0  0
  [ 1] .text             PROGBITS        0000000000000000 000040 000000 00  AX  0   0  1
  [ 2] .text.startup     PROGBITS        0000000000000000 000040 000002 00 AXE  0   0  1
  [ 3] .data             PROGBITS        0000000000000000 000042 000000 00  WA  0   0  1
  [ 4] .bss              NOBITS          0000000000000000 000042 000000 00  WA  0   0  1
  [ 5] .shstrtab         STRTAB          0000000000000000 0000fc 00003a 00      0   0  1
  [ 6] .symtab           SYMTAB          0000000000000000 000048 0000a8 18      7   5  8
  [ 7] .strtab           STRTAB          0000000000000000 0000f0 00000c 00      0   0  1
Key to Flags:
  W (write), A (alloc), X (execute), M (merge), S (strings), I (info),
  L (link order), O (extra OS processing required), G (group), T (TLS),
  C (compressed), x (unknown), o (OS specific), E (exclude),
  l (large), p (processor specific)
[hjl@gnu-6 exclude-1]$ 

2 different .text.startup sections are merged into one.
Comment 1 H.J. Lu 2016-08-26 22:08:54 UTC
This works:

diff --git a/ld/emultempl/elf32.em b/ld/emultempl/elf32.em
index dd4d35a..6ce4e00 100644
--- a/ld/emultempl/elf32.em
+++ b/ld/emultempl/elf32.em
@@ -1903,9 +1903,16 @@ gld${EMULATION_NAME}_place_orphan (asection *s,
      lang_insert_orphan to create a new output section.  */
   constraint = SPECIAL;
 
+  /* SEC_EXCLUDE is ignored when doing a relocatable link.  But
+     we can't merge 2 input sections with the same name when only
+     one of them has SHF_EXCLUDE.  */
   if (os->bfd_section != NULL
       && (os->bfd_section->flags == 0
-     || (((s->flags ^ os->bfd_section->flags)
+     || ((!bfd_link_relocatable (&link_info)
+          || (((elf_section_flags (s)
+          ^ elf_section_flags (os->bfd_section))
+         & SHF_EXCLUDE) == 0))
+         && ((s->flags ^ os->bfd_section->flags)
           & (SEC_LOAD | SEC_ALLOC)) == 0
          && _bfd_elf_match_sections_by_type (link_info.output_bfd,
                     os->bfd_section,
Comment 2 Nick Clifton 2016-09-28 11:46:24 UTC
Hi H.J.

> This works:
> 
> diff --git a/ld/emultempl/elf32.em b/ld/emultempl/elf32.em
> index dd4d35a..6ce4e00 100644
> --- a/ld/emultempl/elf32.em
> +++ b/ld/emultempl/elf32.em
> @@ -1903,9 +1903,16 @@ gld${EMULATION_NAME}_place_orphan (asection *s,
>       lang_insert_orphan to create a new output section.  */
>    constraint = SPECIAL;
> 
> +  /* SEC_EXCLUDE is ignored when doing a relocatable link.  But
> +     we can't merge 2 input sections with the same name when only
> +     one of them has SHF_EXCLUDE.  */
>    if (os->bfd_section != NULL
>        && (os->bfd_section->flags == 0
> -     || (((s->flags ^ os->bfd_section->flags)
> +     || ((!bfd_link_relocatable (&link_info)
> +          || (((elf_section_flags (s)
> +          ^ elf_section_flags (os->bfd_section))
> +         & SHF_EXCLUDE) == 0))
> +         && ((s->flags ^ os->bfd_section->flags)
>            & (SEC_LOAD | SEC_ALLOC)) == 0
>           && _bfd_elf_match_sections_by_type (link_info.output_bfd,
>                      os->bfd_section,

Looks good to me too - please consider the patch approved.

Cheers
  Nick
Comment 3 Sourceware Commits 2016-09-29 20:00:14 UTC
The master branch has been updated by H.J. Lu <hjl@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=93dc595d7659a8cf224a9fc33aa9071f38328334

commit 93dc595d7659a8cf224a9fc33aa9071f38328334
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Thu Sep 29 12:58:29 2016 -0700

    Don't merge 2 sections with different SHF_EXCLUDE
    
    SEC_EXCLUDE is ignored when doing a relocatable link.  But we can't
    merge 2 input sections with the same name when only one of them has
    SHF_EXCLUDE.
    
    	PR ld/20528
    	* emultempl/elf32.em (gld${EMULATION_NAME}_place_orphan): Don't
    	merge 2 sections with different SHF_EXCLUDE.
    	* testsuite/ld-elf/pr20528a.d: New file.
    	* testsuite/ld-elf/pr20528a.s: Likewise.
    	* testsuite/ld-elf/pr20528b.d: Likewise.
    	* testsuite/ld-elf/pr20528b.s: Likewise.
Comment 4 H.J. Lu 2016-09-29 20:00:55 UTC
Fixed.
Comment 5 Nick Clifton 2016-09-30 08:22:19 UTC
Hi H.J.

  Your test for this PR has introduced some new linker testsuite failures:

Checking Binutils in: msp430-elf ... LD: 2 done
  LD REGRESSION: ld-elf/pr20528a    
  LD REGRESSION: ld-elf/pr20528b    
Checking Binutils in: mt-elf ... LD: 3 done
  LD REGRESSION: ld-elf/pr20528a    
  LD REGRESSION: ld-elf/pr20528b    
Checking Binutils in: nds32le-elf ... GAS: 3 LD: 16 done
  LD REGRESSION: ld-elf/pr20528a    
  LD REGRESSION: ld-elf/pr20528b    
Checking Binutils in: i860-stardent-elf ... LD: 2 done
  LD REGRESSION: ld-elf/pr20528a    
  LD REGRESSION: ld-elf/pr20528b    
Checking Binutils in: iq2000-elf ... LD: 2 done
  LD REGRESSION: ld-elf/pr20528a    
  LD REGRESSION: ld-elf/pr20528b    
Checking Binutils in: pj-elf ... GAS: 1 LD: 2 done
  LD REGRESSION: ld-elf/pr20528a    
  LD REGRESSION: ld-elf/pr20528b    
Checking Binutils in: fr30-elf ... LD: 2 done
  LD REGRESSION: ld-elf/pr20528a    
  LD REGRESSION: ld-elf/pr20528b    
Checking Binutils in: ft32-elf ... LD: 4 done
  LD REGRESSION: ld-elf/pr20528a    
  LD REGRESSION: ld-elf/pr20528b    
Checking Binutils in: moxie-elf ... LD: 4 done
  LD REGRESSION: ld-elf/pr20528a    
  LD REGRESSION: ld-elf/pr20528b    
Checking Binutils in: cr16-elf ... LD: 2 done
  LD REGRESSION: ld-elf/pr20528a    
  LD REGRESSION: ld-elf/pr20528b    
Checking Binutils in: crx-elf ... LD: 2 done
  LD REGRESSION: ld-elf/pr20528a    
  LD REGRESSION: ld-elf/pr20528b    
Checking Binutils in: d10v-elf ... LD: 2 done
  LD REGRESSION: ld-elf/pr20528a    
  LD REGRESSION: ld-elf/pr20528b    
Checking Binutils in: d30v-elf ... LD: 2 done
  LD REGRESSION: ld-elf/pr20528a    
  LD REGRESSION: ld-elf/pr20528b    
Checking Binutils in: dlx-elf ... LD: 4 done
  LD REGRESSION: ld-elf/pr20528a    
  LD REGRESSION: ld-elf/pr20528b    
Checking Binutils in: frv-elf ... LD: 2 done
  LD REGRESSION: ld-elf/pr20528a    
  LD REGRESSION: ld-elf/pr20528b    
Checking Binutils in: hppa-linux-gnu ... LD: 16 done
  LD REGRESSION: ld-elf/pr20528a    
  LD REGRESSION: ld-elf/pr20528b    

Please could you fix these ?

Cheers
  Nick
Comment 6 Sourceware Commits 2016-09-30 08:22:35 UTC
The master branch has been updated by Alan Modra <amodra@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=80169c8a23d9bd3f213028e3d44239b03d0aedf7

commit 80169c8a23d9bd3f213028e3d44239b03d0aedf7
Author: Alan Modra <amodra@gmail.com>
Date:   Fri Sep 30 16:09:42 2016 +0930

    Fix pr20528 testsuite
    
    	PR ld/20528
    	* testsuite/ld-elf/pr20528a.d: xfail generic elf targets.  Allow
    	multiple .text sections for hppa-linux.
    	* testsuite/ld-elf/pr20528b.d: Likewise.
Comment 7 Nick Clifton 2016-09-30 08:23:55 UTC
(In reply to Nick Clifton from comment #5)

Never mind - Alan has already fixed them. :-)

Cheers
  Nick
Comment 8 Sourceware Commits 2016-10-11 12:53:16 UTC
The master branch has been updated by Nick Clifton <nickc@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=a24bb4f0cce83eea8b2ad1542316651143af6f90

commit a24bb4f0cce83eea8b2ad1542316651143af6f90
Author: Nick Clifton <nickc@redhat.com>
Date:   Tue Oct 11 13:50:10 2016 +0100

    Enhance objdump so that it will use .got, .plt and .plt.got section symbols when disassembling, and it will use dynamic relocs to interpret entries in the PLT and GOT.
    
    binutils * objdump.c (is_significant_symbol_name): New function.
    	(remove_useless_symbols): Do not remove significanr symbols.
    	(find_symbol_for_address): If an exact match for the specified
    	address has not been found, try scanning the dynamic relocs to see
    	if one of these matches the address.  If so, use the symbol
    	associated with the reloc.
    	(objdump_print_addr_with_symbol): Do not print offsets to symbols
    	with no value.
    	(disassemble_section): Only use dynamic relocs if the user
    	requested this.
    	(disassemble_data): Always load dynamic relocs if they are
    	available.
    
    ld	* ld-aarch64/emit-relocs-515-be.d: Adjust output to match change
    	in objdump.
    	* ld-aarch64/emit-relocs-515.d: Likewise.
    	* ld-aarch64/emit-relocs-516-be.d: Likewise.
    	* ld-aarch64/emit-relocs-516.d: Likewise.
    	* ld-aarch64/farcall-b-plt.d: Likewise.
    	* ld-aarch64/farcall-bl-plt.d: Likewise.
    	* ld-aarch64/gc-plt-relocs.d: Likewise.
    	* ld-aarch64/tls-desc-ie.d: Likewise.
    	* ld-aarch64/tls-tiny-desc.d: Likewise.
    	* ld-aarch64/tls-tiny-gd.d: Likewise.
    	* ld-aarch64/tls-tiny-ie.d: Likewise.
    	* ld-arm/arm-app-abs32.d: Likewise.
    	* ld-arm/arm-app.d: Likewise.
    	* ld-arm/arm-lib-plt32.d: Likewise.
    	* ld-arm/arm-lib.d: Likewise.
    	* ld-arm/armthumb-lib.d: Likewise.
    	* ld-arm/cortex-a8-fix-b-plt.d: Likewise.
    	* ld-arm/cortex-a8-fix-bcc-plt.d: Likewise.
    	* ld-arm/cortex-a8-fix-bl-plt.d: Likewise.
    	* ld-arm/cortex-a8-fix-bl-rel-plt.d: Likewise.
    	* ld-arm/cortex-a8-fix-blx-plt.d: Likewise.
    	* ld-arm/farcall-mixed-app-v5.d: Likewise.
    	* ld-arm/farcall-mixed-app.d: Likewise.
    	* ld-arm/farcall-mixed-app2.d: Likewise.
    	* ld-arm/farcall-mixed-lib-v4t.d: Likewise.
    	* ld-arm/farcall-mixed-lib.d: Likewise.
    	* ld-arm/ifunc-10.dd: Likewise.
    	* ld-arm/ifunc-14.dd: Likewise.
    	* ld-arm/ifunc-15.dd: Likewise.
    	* ld-arm/ifunc-3.dd: Likewise.
    	* ld-arm/ifunc-4.dd: Likewise.
    	* ld-arm/ifunc-9.dd: Likewise.
    	* ld-arm/long-plt-format.d: Likewise.
    	* ld-arm/mixed-app-v5.d: Likewise.
    	* ld-arm/mixed-app.d: Likewise.
    	* ld-arm/mixed-lib.d: Likewise.
    	* ld-arm/tls-lib-loc.d: Likewise.
    	* ld-cris/dso-pltdis1.d: Likewise.
    	* ld-cris/dso-pltdis2.d: Likewise.
    	* ld-cris/dso12-pltdis.d: Likewise.
    	* ld-elf/symbolic-func.r: Likewise.
    	* ld-frv/fdpic-pie-1.d: Likewise.
    	* ld-frv/fdpic-pie-2.d: Likewise.
    	* ld-frv/fdpic-pie-6.d: Likewise.
    	* ld-frv/fdpic-pie-7.d: Likewise.
    	* ld-frv/fdpic-pie-8.d: Likewise.
    	* ld-frv/fdpic-shared-1.d: Likewise.
    	* ld-frv/fdpic-shared-2.d: Likewise.
    	* ld-frv/fdpic-shared-3.d: Likewise.
    	* ld-frv/fdpic-shared-4.d: Likewise.
    	* ld-frv/fdpic-shared-5.d: Likewise.
    	* ld-frv/fdpic-shared-6.d: Likewise.
    	* ld-frv/fdpic-shared-7.d: Likewise.
    	* ld-frv/fdpic-shared-8.d: Likewise.
    	* ld-frv/fdpic-shared-local-2.d: Likewise.
    	* ld-frv/fdpic-shared-local-8.d: Likewise.
    	* ld-frv/fdpic-static-1.d: Likewise.
    	* ld-frv/fdpic-static-2.d: Likewise.
    	* ld-frv/fdpic-static-6.d: Likewise.
    	* ld-frv/fdpic-static-7.d: Likewise.
    	* ld-frv/fdpic-static-8.d: Likewise.
    	* ld-frv/tls-dynamic-2.d: Likewise.
    	* ld-frv/tls-initial-shared-2.d: Likewise.
    	* ld-frv/tls-relax-shared-2.d: Likewise.
    	* ld-frv/tls-shared-2.d: Likewise.
    	* ld-i386/plt-nacl.pd: Likewise.
    	* ld-i386/plt-pic-nacl.pd: Likewise.
    	* ld-i386/plt-pic.pd: Likewise.
    	* ld-i386/plt.pd: Likewise.
    	* ld-i386/pr19636-1d-nacl.d: Likewise.
    	* ld-i386/pr19636-1d.d: Likewise.
    	* ld-i386/pr19636-2c-nacl.d: Likewise.
    	* ld-i386/pr19636-2c.d: Likewise.
    	* ld-ifunc/ifunc-21-x86-64.d: Likewise.
    	* ld-ifunc/ifunc-22-x86-64.d: Likewise.
    	* ld-ifunc/pr17154-i386.d: Likewise.
    	* ld-ifunc/pr17154-x86-64.d: Likewise.
    	* ld-m68k/plt1-68020.d: Likewise.
    	* ld-m68k/plt1-cpu32.d: Likewise.
    	* ld-m68k/plt1-isab.d: Likewise.
    	* ld-m68k/plt1-isac.d: Likewise.
    	* ld-metag/shared.d: Likewise.
    	* ld-metag/stub_pic_app.d: Likewise.
    	* ld-metag/stub_pic_shared.d: Likewise.
    	* ld-metag/stub_shared.d: Likewise.
    	* ld-s390/tlsbin_64.dd: Likewise.
    	* ld-s390/tlspic_64.dd: Likewise.
    	* ld-tic6x/shlib-1.dd: Likewise.
    	* ld-tic6x/shlib-1b.dd: Likewise.
    	* ld-tic6x/shlib-1rb.dd: Likewise.
    	* ld-tic6x/shlib-app-1.dd: Likewise.
    	* ld-tic6x/shlib-app-1b.dd: Likewise.
    	* ld-tic6x/shlib-app-1r.dd: Likewise.
    	* ld-tic6x/shlib-app-1rb.dd: Likewise.
    	* ld-tic6x/shlib-noindex.dd: Likewise.
    	* ld-vax-elf/export-class-data.dd: Likewise.
    	* ld-vax-elf/plt-local-lib.dd: Likewise.
    	* ld-vax-elf/plt-local.dd: Likewise.
    	* ld-x86-64/bnd-ifunc-2.d: Likewise.
    	* ld-x86-64/bnd-plt-1.d: Likewise.
    	* ld-x86-64/gotpcrel1.dd: Likewise.
    	* ld-x86-64/libno-plt-1b.dd: Likewise.
    	* ld-x86-64/load1c-nacl.d: Likewise.
    	* ld-x86-64/load1c.d: Likewise.
    	* ld-x86-64/load1d-nacl.d: Likewise.
    	* ld-x86-64/load1d.d: Likewise.
    	* ld-x86-64/mov1a.d: Likewise.
    	* ld-x86-64/mov1b.d: Likewise.
    	* ld-x86-64/mov1c.d: Likewise.
    	* ld-x86-64/mov1d.d: Likewise.
    	* ld-x86-64/mov2a.d: Likewise.
    	* ld-x86-64/mov2b.d: Likewise.
    	* ld-x86-64/mov2c.d: Likewise.
    	* ld-x86-64/mov2d.d: Likewise.
    	* ld-x86-64/mpx3.dd: Likewise.
    	* ld-x86-64/mpx4.dd: Likewise.
    	* ld-x86-64/no-plt-1a.dd: Likewise.
    	* ld-x86-64/no-plt-1b.dd: Likewise.
    	* ld-x86-64/no-plt-1c.dd: Likewise.
    	* ld-x86-64/no-plt-1e.dd: Likewise.
    	* ld-x86-64/no-plt-1f.dd: Likewise.
    	* ld-x86-64/no-plt-1g.dd: Likewise.
    	* ld-x86-64/plt-main-bnd.dd: Likewise.
    	* ld-x86-64/plt-nacl.pd: Likewise.
    	* ld-x86-64/plt.pd: Likewise.
    	* ld-x86-64/pr18591.d: Likewise.
    	* ld-x86-64/pr19609-1c.d: Likewise.
    	* ld-x86-64/pr19609-1e.d: Likewise.
    	* ld-x86-64/pr19609-1j.d: Likewise.
    	* ld-x86-64/pr19609-1l.d: Likewise.
    	* ld-x86-64/pr19609-1m.d: Likewise.
    	* ld-x86-64/pr19609-5b.d: Likewise.
    	* ld-x86-64/pr19609-5c.d: Likewise.
    	* ld-x86-64/pr19609-5e.d: Likewise.
    	* ld-x86-64/pr19609-6b.d: Likewise.
    	* ld-x86-64/pr19609-7b.d: Likewise.
    	* ld-x86-64/pr19609-7d.d: Likewise.
    	* ld-x86-64/pr19636-2d.d: Likewise.
    	* ld-x86-64/pr20093-1.d: Likewise.
    	* ld-x86-64/pr20093-2.d: Likewise.
    	* ld-x86-64/pr20253-1b.d: Likewise.
    	* ld-x86-64/pr20253-1d.d: Likewise.
    	* ld-x86-64/pr20253-1f.d: Likewise.
    	* ld-x86-64/pr20253-1h.d: Likewise.
    	* ld-x86-64/pr20253-1j.d: Likewise.
    	* ld-x86-64/pr20253-1l.d: Likewise.
    	* ld-x86-64/protected3.d: Likewise.
    	* ld-x86-64/tlsbin.dd: Likewise.
    	* ld-x86-64/tlsbin2.dd: Likewise.
    	* ld-x86-64/tlsbindesc.dd: Likewise.
    	* ld-x86-64/tlsdesc-nacl.pd: Likewise.
    	* ld-x86-64/tlsdesc.dd: Likewise.
    	* ld-x86-64/tlsdesc.pd: Likewise.
    	* ld-x86-64/tlsgd10.dd: Likewise.
    	* ld-x86-64/tlsgd5.dd: Likewise.
    	* ld-x86-64/tlsgd6.dd: Likewise.
    	* ld-x86-64/tlsgd8.dd: Likewise.
    	* ld-x86-64/tlsgdesc.dd: Likewise.
    	* ld-x86-64/tlspic.dd: Likewise.
    	* ld-x86-64/tlspic2.dd: Likewise.
    
    2016-10-11  Nick Clifton  <nickc@redhat.com>
    
    	PR ld/20535
    	* emultempl/elf32.em (_search_needed): Add support for pseudo
    	environment variables supported by ld.so.  Namely $ORIGIN, $LIB
    	and $PLATFORM.
    	* configure.ac: Add getauxval to list AC_CHECK_FUNCS list.
    	* config.in: Regenerate.
    	* configure: Regenerate.
    
    2016-10-11  Alan Modra  <amodra@gmail.com>
    
    	* ldlang.c (lang_do_assignments_1): Descend into output section
    	statements that do not yet have bfd sections.  Set symbol section
    	temporarily for symbols defined in such statements to the undefined
    	section.  Don't error on data or reloc statements until final phase.
    	* ldexp.c (exp_fold_tree_1 <etree_assign>): Handle bfd_und_section
    	in expld.section.
    	* testsuite/ld-mmix/bpo-10.d: Adjust.
    	* testsuite/ld-mmix/bpo-11.d: Adjust.
    
    2016-10-10  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>
    
    	* emulparams/elf64_s390.sh: Move binary start to 16M.
    	* testsuite/ld-s390/tlsbin_64.dd: Adjust testcases accordingly.
    	* testsuite/ld-s390/tlsbin_64.rd: Likewise.
    
    2016-10-07  Alan Modra  <amodra@gmail.com>
    
    	* ldexp.c (MAX): Define.
    	(exp_unop, exp_binop, exp_trinop): Alloc at least enough for
    	etree_type.value.
    
    2016-10-07  Alan Modra  <amodra@gmail.com>
    
    	* testsuite/lib/ld-lib.exp (is_generic_elf): New, extracted from..
    	* testsuite/ld-elf/elf.exp: ..here.
    
    2016-10-06  Ludovic Court?s  <ludo@gnu.org>
    
    	* emulparams/elf32bmipn32-defs.sh: Shift quote of
    	"x$EMULATION_NAME" to the left to work around
    	<http://ftp.gnu.org/gnu/bash/bash-4.2-patches/bash42-007>.
    
    2016-10-06  Alan Modra  <amodra@gmail.com>
    
    	* lexsup.c: Spell fall through comments consistently and add
    	missing fall through comments.
    
    2016-10-06  Alan Modra  <amodra@gmail.com>
    
    	* plugin.c (asymbol_from_plugin_symbol): Avoid compiler warning
    	by adding return.
    
    2016-10-04  Alan Modra  <amodra@gmail.com>
    
    	* ld.texinfo (Expression Section): Update result of arithmetic
    	expressions.
    	* ldexp.c (arith_result_section): New function.
    	(fold_binary): Use it.
    
    2016-10-04  Alan Modra  <amodra@gmail.com>
    
    	* ldexp.c (exp_value_fold): New function.
    	(exp_unop, exp_binop, exp_trinop): Use it.
    
    2016-09-30  Alan Modra  <amodra@gmail.com>
    
    	* scripttempl/v850.sc: Don't reference __ctbp, __ep, __gp when
    	not relocating.
    	* scripttempl/v850_rh850.sc: Likewise.
    
    2016-09-30  Alan Modra  <amodra@gmail.com>
    
    	PR ld/20528
    	* testsuite/ld-elf/pr20528a.d: xfail generic elf targets.  Allow
    	multiple .text sections for hppa-linux.
    	* testsuite/ld-elf/pr20528b.d: Likewise.
    
    2016-09-30  Alan Modra  <amodra@gmail.com>
    
    	* ldmain.c (default_bfd_error_handler): New function pointer.
    	(ld_bfd_error_handler): New function.
    	(main): Arrange to call it on bfd errors/warnings.
    	(ld_bfd_assert_handler): Enable tail call.
    
    2016-09-30  Alan Modra  <amodra@gmail.com>
    
    	* ldlang.c (ignore_bfd_errors): Update params.
    
    2016-09-29  H.J. Lu  <hongjiu.lu@intel.com>
    
    	PR ld/20528
    	* emultempl/elf32.em (gld${EMULATION_NAME}_place_orphan): Don't
    	merge 2 sections with different SHF_EXCLUDE.
    	* testsuite/ld-elf/pr20528a.d: New file.
    	* testsuite/ld-elf/pr20528a.s: Likewise.
    	* testsuite/ld-elf/pr20528b.d: Likewise.
    	* testsuite/ld-elf/pr20528b.s: Likewise.
    
    2016-09-28  Christophe Lyon  <christophe.lyon@linaro.org>
    
    	PR ld/20608
    	* testsuite/ld-arm/arm-elf.exp: Handle new testcase.
    	* testsuite/ld-arm/farcall-mixed-app2.d: New file.
    	* testsuite/ld-arm/farcall-mixed-app2.r: Likewise.
    	* testsuite/ld-arm/farcall-mixed-app2.s: Likewise.
    	* testsuite/ld-arm/farcall-mixed-app2.sym: Likewise.
    
    2016-09-26  Vlad Zakharov  <vzakhar@synopsys.com>
    
    	* Makefile.in: Regenerate.
    	* configure: Likewise.
    
    2016-09-26  Alan Modra  <amodra@gmail.com>
    
    	* testsuite/ld-powerpc/attr-gnu-4-4.s: Delete.
    	* testsuite/ld-powerpc/attr-gnu-4-14.d: Delete.
    	* testsuite/ld-powerpc/attr-gnu-4-24.d: Delete.
    	* testsuite/ld-powerpc/attr-gnu-4-34.d: Delete.
    	* testsuite/ld-powerpc/attr-gnu-4-41.d: Delete.
    	* testsuite/ld-powerpc/attr-gnu-4-32.d: Adjust expected warning.
    	* testsuite/ld-powerpc/attr-gnu-8-23.d: Likewise.
    	* testsuite/ld-powerpc/attr-gnu-4-01.d: Adjust expected output.
    	* testsuite/ld-powerpc/attr-gnu-4-02.d: Likewise.
    	* testsuite/ld-powerpc/attr-gnu-4-03.d: Likewise.
    	* testsuite/ld-powerpc/attr-gnu-4-10.d: Likewise.
    	* testsuite/ld-powerpc/attr-gnu-4-11.d: Likewise.
    	* testsuite/ld-powerpc/attr-gnu-4-20.d: Likewise.
    	* testsuite/ld-powerpc/attr-gnu-4-22.d: Likewise.
    	* testsuite/ld-powerpc/attr-gnu-4-33.d: Likewise.
    	* testsuite/ld-powerpc/attr-gnu-8-11.d: Likewise.
    	* testsuite/ld-powerpc/powerpc.exp: Don't run deleted tests.
    
    2016-09-23  Akihiko Odaki  <akihiko.odaki.4i@stu.hosei.ac.jp>
    
    	PR ld/20595
    	* testsuite/ld-arm/unwind-4.d: Add -q option to linker command
    	line and -r option to objdump command line.  Match emitted relocs
    	to make sure that superflous relocs are not generated.
    
    2016-09-23  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>
    
    	* emulparams/elf64_s390.sh: Change TEXT_START_ADDR to 256MB.
    	* testsuite/ld-s390/tlsbin_64.dd: Adjust testcase accordingly.
    	* testsuite/ld-s390/tlsbin_64.rd: Likewise.
    
    2016-09-22  Nick Clifton  <nickc@redhat.com>
    
    	* emultempl/elf32.em (_try_needed): In verbose mode, report failed
    	attempts to find a needed library.
    
    2016-09-21  Richard Sandiford  <richard.sandiford@arm.com>
    
    	* testsuite/ld-aarch64/emit-relocs-28.d: Expect spaces after ","
    	in addresses.
    	* testsuite/ld-aarch64/emit-relocs-301-be.d: Likewise.
    	* testsuite/ld-aarch64/emit-relocs-301.d: Likewise.
    	* testsuite/ld-aarch64/emit-relocs-302-be.d: Likewise.
    	* testsuite/ld-aarch64/emit-relocs-302.d: Likewise.
    	* testsuite/ld-aarch64/emit-relocs-310-be.d: Likewise.
    	* testsuite/ld-aarch64/emit-relocs-310.d: Likewise.
    	* testsuite/ld-aarch64/emit-relocs-313.d: Likewise.
    	* testsuite/ld-aarch64/emit-relocs-515-be.d: Likewise.
    	* testsuite/ld-aarch64/emit-relocs-515.d: Likewise.
    	* testsuite/ld-aarch64/emit-relocs-516-be.d: Likewise.
    	* testsuite/ld-aarch64/emit-relocs-516.d: Likewise.
    	* testsuite/ld-aarch64/emit-relocs-531.d: Likewise.
    	* testsuite/ld-aarch64/emit-relocs-532.d: Likewise.
    	* testsuite/ld-aarch64/emit-relocs-533.d: Likewise.
    	* testsuite/ld-aarch64/emit-relocs-534.d: Likewise.
    	* testsuite/ld-aarch64/emit-relocs-535.d: Likewise.
    	* testsuite/ld-aarch64/emit-relocs-536.d: Likewise.
    	* testsuite/ld-aarch64/emit-relocs-537.d: Likewise.
    	* testsuite/ld-aarch64/emit-relocs-538.d: Likewise.
    	* testsuite/ld-aarch64/erratum835769.d: Likewise.
    	* testsuite/ld-aarch64/erratum843419.d: Likewise.
    	* testsuite/ld-aarch64/farcall-b-plt.d: Likewise.
    	* testsuite/ld-aarch64/farcall-bl-plt.d: Likewise.
    	* testsuite/ld-aarch64/gc-plt-relocs.d: Likewise.
    	* testsuite/ld-aarch64/ifunc-21.d: Likewise.
    	* testsuite/ld-aarch64/ifunc-7c.d: Likewise.
    	* testsuite/ld-aarch64/tls-desc-ie.d: Likewise.
    	* testsuite/ld-aarch64/tls-large-desc-be.d: Likewise.
    	* testsuite/ld-aarch64/tls-large-desc.d: Likewise.
    	* testsuite/ld-aarch64/tls-large-ie-be.d: Likewise.
    	* testsuite/ld-aarch64/tls-large-ie.d: Likewise.
    	* testsuite/ld-aarch64/tls-relax-all.d: Likewise.
    	* testsuite/ld-aarch64/tls-relax-gd-ie.d: Likewise.
    	* testsuite/ld-aarch64/tls-relax-gdesc-ie-2.d: Likewise.
    	* testsuite/ld-aarch64/tls-relax-gdesc-ie.d: Likewise.
    	* testsuite/ld-aarch64/tls-relax-large-desc-ie-be.d: Likewise.
    	* testsuite/ld-aarch64/tls-relax-large-desc-ie.d: Likewise.
    	* testsuite/ld-aarch64/tls-tiny-desc.d: Likewise.
    	* testsuite/ld-aarch64/tls-tiny-gd.d: Likewise.
    
    gas	* gas/arm/tls.d: Adjust output to match change in objdump.