* lib/binutils-common.exp (is_zlib_supported): New function.
* lib/utils-lib.exp (run_dump_test): If as options include
--compress-debug-sections and zlib is not available, report
the test as unsupported.
* binutils-all/compress.exp: Bail out if zlib is not available.
* binutils-all/objdump.exp (objdump compressed debug):
Mark unsupported if zlib is not available.
* binutils-all/readelf.exp (readelf_compressed_wa_test): Likewise.
gas/testsuite/
* lib/gas-defs.exp (run_dump_test): If as options include
--compress-debug-sections and zlib is not available, report
the test as unsupported.
ld/testsuite/
* ld-elf/compress.exp: Bail out if zlib is not supported.
* lib/ld-lib.exp (run_dump_test): If as options include
--compress-debug-sections and zlib is not available, report
the test as unsupported.
Joseph Myers <joseph@codesourcery.com>
Andrew Stubbs <ams@codesourcery.com>
bfd/
* config.bfd (sh-*-uclinux* | sh[12]-*-uclinux*): Add
bfd_elf32_shl_vec, and FDPIC vectors to targ_selvecs.
* configure.in: Handle FDPIC vectors.
* elf32-sh-relocs.h: Add FDPIC and movi20 relocations.
* elf32-sh.c (DEFAULT_STACK_SIZE): Define.
(SYMBOL_FUNCDESC_LOCAL): Define. Use it instead of
SYMBOL_REFERENCES_LOCAL for function descriptors.
(fdpic_object_p): New.
(sh_reloc_map): Add FDPIC and movi20 relocations.
(sh_elf_info_to_howto, sh_elf_relocate_section): Handle new invalid
range.
(struct elf_sh_plt_info): Add got20 and short_plt. Update all
definitions.
(FDPIC_PLT_ENTRY_SIZE, FDPIC_PLT_LAZY_OFFSET): Define.
(fdpic_sh_plt_entry_be, fdpic_sh_plt_entry_le, fdpic_sh_plts): New.
(FDPIC_SH2A_PLT_ENTRY_SIZE, FDPIC_SH2A_PLT_LAZY_OFFSET): Define.
(fdpic_sh2a_plt_entry_be, fdpic_sh2a_plt_entry_le)
(fdpic_sh2a_short_plt_be, fdpic_sh2a_short_plt_le, fdpic_sh2a_plts):
New.
(get_plt_info): Handle FDPIC.
(MAX_SHORT_PLT): Define.
(get_plt_index, get_plt_offset): Handle short_plt.
(union gotref): New.
(struct elf_sh_link_hash_entry): Add funcdesc, rename tls_type to
got_type and adjust all uses. Add GOT_FUNCDESC.
(struct sh_elf_obj_tdata): Add local_funcdesc. Rename
local_got_tls_type to local_got_type.
(sh_elf_local_got_type): Renamed from sh_elf_local_got_tls_type. All
users changed.
(sh_elf_local_funcdesc): Define.
(struct elf_sh_link_hash_table): Add sfuncdesc, srelfuncdesc, fdpic_p,
and srofixup.
(sh_elf_link_hash_newfunc): Initialize new fields.
(sh_elf_link_hash_table_create): Set fdpic_p.
(sh_elf_omit_section_dynsym): New.
(create_got_section): Create .got.funcdesc, .rela.got.funcdesc
and .rofixup.
(allocate_dynrelocs): Allocate local function descriptors and space
for R_SH_FUNCDESC-related relocations, and for rofixups.
Handle GOT_FUNCDESC. Create fixups. Handle GOT entries which
require function descriptors.
(sh_elf_always_size_sections): Handle PT_GNU_STACK and __stacksize.
(sh_elf_modify_program_headers): New.
(sh_elf_size_dynamic_sections): Allocate function descriptors for
local symbols. Allocate .got.funcdesc contents. Allocate rofixups.
Handle local GOT entries of type GOT_FUNCDESC. Create fixups for
local GOT entries. Ensure that FDPIC libraries always have a PLTGOT
entry in the .dynamic section.
(sh_elf_add_dyn_reloc, sh_elf_got_offset, sh_elf_initialize_funcdesc)
(sh_elf_add_rofixup, sh_elf_osec_to_segment)
(sh_elf_osec_readonly_p, install_movi20_field): New functions.
(sh_elf_relocate_section): Handle new relocations, R_SH_FUNCDESC,
R_SH_GOTFUNCDESC and R_SH_GOTOFFFUNCDESC. Use sh_elf_got_offset
and .got.plt throughout to find _GLOBAL_OFFSET_TABLE_. Add rofixup
read-only section warnings. Handle undefined weak symbols. Generate
fixups for R_SH_DIR32 and GOT entries. Check for cross-segment
relocations and clear EF_SH_PIC. Handle 20-bit relocations.
Always generate R_SH_DIR32 for FDPIC instead of R_SH_RELATIVE.
(sh_elf_gc_sweep_hook): Handle R_SH_FUNCDESC, R_SH_GOTOFF20,
R_SH_GOTFUNCDESC, R_SH_GOTFUNCDESC20, and R_SH_GOTOFFFUNCDESC.
Handle 20-bit relocations.
(sh_elf_copy_indirect_symbol): Copy function descriptor reference
counts.
(sh_elf_check_relocs): Handle new relocations. Make symbols
dynamic for FDPIC relocs. Account for rofixups. Error for FDPIC
symbol mismatches. Allocate a GOT for R_SH_DIR32. Allocate fixups
for R_SH_DIR32.
(sh_elf_copy_private_data): Copy PT_GNU_STACK size.
(sh_elf_merge_private_data): Copy initial flags. Do not clobber
non-mach flags. Set EF_SH_PIC for FDPIC. Reject FDPIC mismatches.
(sh_elf_finish_dynamic_symbol): Do not handle got_funcdesc entries
here. Rename sgot to sgotplt and srel to srelplt. Handle short_plt,
FDPIC descriptors, and got20. Create R_SH_FUNCDESC_VALUE for FDPIC.
Use install_movi20_field. Rename srel to srelgot. Always generate
R_SH_DIR32 for FDPIC instead of R_SH_RELATIVE.
(sh_elf_finish_dynamic_sections): Fill in the GOT pointer in rofixup.
Do not fill in reserved GOT entries for FDPIC. Correct DT_PLTGOT.
Rename sgot to sgotplt. Assert that the right number of rofixups
and dynamic relocations were allocated.
(sh_elf_use_relative_eh_frame, sh_elf_encode_eh_address): New.
(elf_backend_omit_section_dynsym): Use sh_elf_omit_section_dynsym.
(elf_backend_can_make_relative_eh_frame)
(elf_backend_can_make_lsda_relative_eh_frame)
(elf_backend_encode_eh_address): Define.
(TARGET_BIG_SYM, TARGET_BIG_NAME, TARGET_LITTLE_SYM)
(TARGET_LITTLE_NAME, elf_backend_modify_program_headers, elf32_bed):
Redefine for FDPIC vector.
* reloc.c: Add SH FDPIC and movi20 relocations.
* targets.c (_bfd_target_vector): Add FDPIC vectors.
* configure, bfd-in2.h, libbfd.h: Regenerated.
binutils/
* readelf.c (get_machine_flags): Handle EF_SH_PIC and EF_SH_FDPIC.
gas/
* config/tc-sh.c (sh_fdpic): New.
(sh_check_fixup): Handle relocations on movi20.
(parse_exp): Do not reject PIC operators here.
(build_Mytes): Check for unhandled PIC operators here. Use
sh_check_fixup for movi20.
(enum options): Add OPTION_FDPIC.
(md_longopts, md_parse_option, md_show_usage): Add --fdpic.
(sh_fix_adjustable, md_apply_fix): Handle FDPIC and movi20 relocations.
(sh_elf_final_processing): Handle --fdpic.
(sh_uclinux_target_format): New.
(sh_parse_name): Handle FDPIC relocation operators.
* config/tc-sh.h (TARGET_FORMAT): Define specially for TE_UCLINUX.
(sh_uclinux_target_format): Declare for TE_UCLINUX.
* configure.tgt (sh-*-uclinux* | sh[12]-*-uclinux*): Set
em=uclinux.
* doc/c-sh.texi (SH Options): Document --fdpic.
gas/testsuite/
* gas/sh/basic.exp: Run new tests. Handle uClinux like Linux.
* gas/sh/fdpic.d: New file.
* gas/sh/fdpic.s: New file.
* gas/sh/reg-prefix.d: Force big-endian.
* gas/sh/sh2a-pic.d: New file.
* gas/sh/sh2a-pic.s: New file.
* lib/gas-defs.exp (is_elf_format): Include sh*-*-uclinux*.
include/elf/
* sh.h (EF_SH_PIC, EF_SH_FDPIC): Define.
(R_SH_FIRST_INVALID_RELOC_6, R_SH_LAST_INVALID_RELOC_6): New. Adjust
other invalid ranges.
(R_SH_GOT20, R_SH_GOTOFF20, R_SH_GOTFUNCDESC, R_SH_GOTFUNCDESC20)
(R_SH_GOTOFFFUNCDESC, R_SH_GOTOFFFUNCDESC20, R_SH_FUNCDESC)
(R_SH_FUNCDESC_VALUE): New.
ld/
* Makefile.am (ALL_EMULATIONS): Add eshelf_fd.o and eshlelf_fd.o.
(eshelf_fd.c, eshlelf_fd.c): New rules.
* Makefile.in: Regenerate.
* configure.tgt (sh-*-uclinux*): Add shelf_fd and shlelf_fd
emulations.
* emulparams/shelf_fd.sh: New file.
* emulparams/shlelf_fd.sh: New file.
* emulparams/shlelf_linux.sh: Update comment.
ld/testsuite/
* ld-sh/sh.exp: Handle uClinux like Linux.
* lib/ld-lib.exp (is_elf_format): Include sh*-*-uclinux*.
* ld-sh/fdpic-funcdesc-shared.d: New file.
* ld-sh/fdpic-funcdesc-shared.s: New file.
* ld-sh/fdpic-funcdesc-static.d: New file.
* ld-sh/fdpic-funcdesc-static.s: New file.
* ld-sh/fdpic-gotfuncdesc-shared.d: New file.
* ld-sh/fdpic-gotfuncdesc-shared.s: New file.
* ld-sh/fdpic-gotfuncdesc-static.d: New file.
* ld-sh/fdpic-gotfuncdesc-static.s: New file.
* ld-sh/fdpic-gotfuncdesci20-shared.d: New file.
* ld-sh/fdpic-gotfuncdesci20-shared.s: New file.
* ld-sh/fdpic-gotfuncdesci20-static.d: New file.
* ld-sh/fdpic-gotfuncdesci20-static.s: New file.
* ld-sh/fdpic-goti20-shared.d: New file.
* ld-sh/fdpic-goti20-shared.s: New file.
* ld-sh/fdpic-goti20-static.d: New file.
* ld-sh/fdpic-goti20-static.s: New file.
* ld-sh/fdpic-gotofffuncdesc-shared.d: New file.
* ld-sh/fdpic-gotofffuncdesc-shared.s: New file.
* ld-sh/fdpic-gotofffuncdesc-static.d: New file.
* ld-sh/fdpic-gotofffuncdesc-static.s: New file.
* ld-sh/fdpic-gotofffuncdesci20-shared.d: New file.
* ld-sh/fdpic-gotofffuncdesci20-shared.s: New file.
* ld-sh/fdpic-gotofffuncdesci20-static.d: New file.
* ld-sh/fdpic-gotofffuncdesci20-static.s: New file.
* ld-sh/fdpic-gotoffi20-shared.d: New file.
* ld-sh/fdpic-gotoffi20-shared.s: New file.
* ld-sh/fdpic-gotoffi20-static.d: New file.
* ld-sh/fdpic-gotoffi20-static.s: New file.
* ld-sh/fdpic-plt-be.d: New file.
* ld-sh/fdpic-plt-le.d: New file.
* ld-sh/fdpic-plt.s: New file.
* ld-sh/fdpic-plti20-be.d: New file.
* ld-sh/fdpic-plti20-le.d: New file.
* ld-sh/fdpic-stack-default.d: New file.
* ld-sh/fdpic-stack-size.d: New file.
* ld-sh/fdpic-stack.s: New file.
2009-05-19 Dave Korn <dave.korn.cygwin@gmail.com>
* cofflink.c (process_embedded_commands): Ignore "-aligncomm".
==> gas/ChangeLog <==
2009-05-19 Dave Korn <dave.korn.cygwin@gmail.com>
* NEWS: Mention new feature.
* config/obj-coff.c (obj_coff_common_parse): New function.
(obj_coff_comm): Likewise.
(coff_pseudo_table): Override default ".comm" definition on PE.
* doc/as.texinfo: Document new feature.
==> gas/testsuite/ChangeLog <==
2009-05-19 Dave Korn <dave.korn.cygwin@gmail.com>
* gas/pe/: New directory for PE format-specific tests.
* gas/pe/aligncomm-a.d: New test pattern file.
* gas/pe/aligncomm-a.s: New test source file.
* gas/pe/aligncomm-b.d: New test pattern file.
* gas/pe/aligncomm-b.s: New test source file.
* gas/pe/aligncomm-c.d: New test pattern file.
* gas/pe/aligncomm-c.s: New test source file.
* gas/pe/aligncomm-d.d: New test pattern file.
* gas/pe/aligncomm-d.s: New test source file.
* gas/pe/pe.exp: New test control script.
* lib/gas-defs.exp (is_pecoff_format): New function.
==> ld/ChangeLog <==
2009-05-19 Dave Korn <dave.korn.cygwin@gmail.com>
* NEWS: Mention new feature.
* deffile.h (def_file_aligncomm): Add new struct definition.
(def_file): Add new def_file_aligncomm member.
* deffilep.y (%token): Add new ALIGNCOMM token.
(command): Add production rule for ALIGNCOMM.
(def_file_free): Free any chained def_file_aligncomm structs.
(diropts[]): Add entry for '-aligncomm' .drectve command.
(def_aligncomm): New grammar function.
* ld.texinfo: Document new feature.
* pe-dll.c (process_def_file): Rename from this ...
(process_def_file_and_drectve): ... to this, updating all callers,
and process any aligncomms chained to the def file after scanning
all .drectve sections.
(generate_edata): Updated to match.
(pe_dll_build_sections): Likewise.
==> ld/testsuite/ChangeLog <==
2009-05-19 Dave Korn <dave.korn.cygwin@gmail.com>
* ld-pe/aligncomm-1.c: New test source file.
* ld-pe/aligncomm-2.c: Likewise.
* ld-pe/aligncomm-3.c: Likewise.
* ld-pe/aligncomm-4.c: Likewise.
* ld-pe/aligncomm.d: New test pattern file.
* ld-pe/direct.exp: Deleted, and content moved into ...
* ld-pe/pe-run.exp: ... New common file for all PE run tests.
* ld-pe/vers-script.exp: Deleted, and content merged into ...
* ld-pe/pe-compile.exp: ... New common file for PE tests needing
a compiler, adding aligned common tests.
* ld-pe/pe.exp: Update header comment.
sequence containing an unsupported reloc type.
(enum options): Replace computed #define's constants for option
numbers with this enum.
(struct md_longopts): Use the enum. Allow OPTION_32 in a non-ELF
environment.
(md_parse_option): Allow -32 in a non-ELF environment.
* gas/lib/gas-defs.exp: Update description of run_dump_test proc.
* gas/mips/dli.d: Pass -64 to gas.
* gas/mips/mips64-mips3d-incl.d: Likewise.
* gas/mips/octeon.d: Likewise.
* gas/mips/sb1-ext-mdmx.d: Likewise.
* gas/mips/sb1-ext-ps.d: Likewise.
* gas/mips/e32el-rel2.s: Pass -march=mips3 to gas.
Update expected relocs.
* gas/mips/ld-ilocks-addr32.d: Do not run for tx39 targets.
* gas/mips/mips.exp: Remove 'ilocks' variable.
Add ecoff targets to 'addr32' variable.
Set 'no_mips16' for ecoff targets.
Do not run div-ilocks or mul-ilocks test variants.
* gas/mips/mips16-intermix.d: Use nm instead of objdump so that
the symbol table output is sorted. Update expecetd output.
2007-08-28 Mark Shinwell <shinwell@codesourcery.com>
Joseph Myers <joseph@codesourcery.com>
* elf32-arm.c (elf32_arm_compare_mapping): Compare first on vma,
then on type.
binutils/testsuite:
2007-08-28 Mark Shinwell <shinwell@codesourcery.com>
Joseph Myers <joseph@codesourcery.com>
* binutils-all/ar.exp (long_filenames): Delete temporary files on
the host.
* binutils-all/arm/objdump.exp: Only check "which $OBJDUMP" if
host is local.
* binutils-all/objcopy.exp: Use ${srecfile} to get the name of the
srec file to be passed to binutils_run.
(objcopy_test_readelf): Use remote_exec.
* binutils-all/readelf.exp (readelf_find_size): Use remote_exec.
(readelf_test): Likewise.
(readelf_wi_test): Likewise.
* lib/utils-lib.exp (run_dump_test): Only check "which $binary" if
host is local. Use remote_exec. Use $tempfile not
tmpdir/bintest.o.
gas:
2007-08-28 Mark Shinwell <shinwell@codesourcery.com>
Joseph Myers <joseph@codesourcery.com>
* as.c (main): Flush stderr before printing listings to ensure
consistent output order across platforms.
gas/testsuite:
2007-08-28 Mark Shinwell <shinwell@codesourcery.com>
Joseph Myers <joseph@codesourcery.com>
* lib/gas-defs.exp (gas_version): Use remote_* functions instead
of exec.
(gas_host_run): New.
(gas_run): Use gas_host_run.
(gas_start): Likewise.
(run_dump_test): Likewise.
(objdump): Use gas_host_run.
(objdump_start_no_subdir): Likewise.
* lib/gas-dg.exp (gas-dg-test): Use "remote_file host delete".
* lib/run: Remove.
* gas/macros/macros.exp: Download app4b.s to host.
* gas/i386/i386.exp (gas_64_check): Use gas_host_run.
(gas_32_check): Likewise.
* gas/maxq10/maxq10.exp (gas_64_check): Likewise
(gas_32_check): Likewise.
* gas/maxq20/maxq20.exp (gas_64_check): Likewise
(gas_32_check): Likewise.
* gas/sparc/sparc.exp (gas_64_check): Likewise.
* gas/cfi/cfi.exp: Likewise.
* gas/elf/elf.exp (run_list_test): Likewise. Use temporary file
for readelf output in place of pipe.
* gas/all/gas.exp: Download incbin.dat to host.
(do_comment): Allow \r\r\n.
ld:
2007-08-28 Mark Shinwell <shinwell@codesourcery.com>
Joseph Myers <joseph@codesourcery.com>
* ldlang.c (sort_sections_by_lma): Sort by internal id after lma
for stable sort.
ld/testsuite:
2007-08-28 Mark Shinwell <shinwell@codesourcery.com>
Joseph Myers <joseph@codesourcery.com>
* ld-elfcomm/elfcomm.exp: Use run_host_cmd. Only check "which
$CC" if host is local.
* ld-checks/checks.exp: Use run_host_cmd.
* ld-elf/exclude.exp: Likewise.
* ld-elf/elf.exp: Download merge.ld if host is remote.
* ld-elf/binutils.exp (binutils_test): Use remote_exec.
* ld-elf/tls_common.exp: Use run_host_cmd.
* lib/ld-lib.exp (ld_version): Only check "which $ld" if host is
local. Use remote_exec.
(run_host_cmd): New.
(run_host_cmd_yesno): New.
(default_ld_relocate): Use run_host_cmd_yesno.
(default_ld_link): Likewise.
(default_ld_simple_link): Use run_host_cmd.
(default_ld_compile): Only check "which $ccprog" if host is local.
Use remote_file and remote_exec.
(default_ld_assemble): Only check "which $as" if host is local.
Use run_host_cmd.
(default_ld_nm): Use remote_exec, remote_upload and remote_file.
(run_dump_test): Use remote_exec, remote_upload and remote_file.
Only check "which $binary" if host is local.
(run_ld_link_tests): Use remote_exec, remote_upload and
remote_file.
* ld-selective/selective.exp: Only check "which $CXX" if host is
local. Use remote_exec.
* ld-scripts/phdrs.exp: Only check "which $objdump" if host is
local. Use run_host_cmd.
* ld-scripts/phdrs2.exp: Likewise.
* ld-scripts/weak.exp: Likewise.
* ld-undefined/weak-undef.exp: Likewise.
* ld-scripts/crossref.exp: Only check "which $CC" if host is local.
Use run_host_cmd.
* ld-scripts/map-address.exp: Upload map_address.map if host is
remote.
* ld-srec/srec.exp (run_srec_tests): Use run_host_cmd. Only check
"which $CC" and "which $CXX" if host is local.
* ld-undefined/undefined.exp: Only check "which $CC" if host is
local. Use remote_file and run_host_cmd.
* config/default.exp: Use remote_exec to create tmpdir.
PR gas/3918
* lib/gas-defs.exp (gas_started): New variable. Initialized to
0.
(gas_start): Set gas_started to 1.
(gas_finish): Skip if gas_started is 0. Reset gas_started to 0.
* lib/gas-defs.exp (run_dump_tests): New proc.
(run_dump_test): Add support for new options: target, not-target,
skip, not-skip, error-output. Document stderr. Tidy a
little.
(slurp_options): If a line doesn't match the option regexp, but
does begin with #, ignore it; don't stop parsing options.
* gas/arm/arm.exp: Remove most code. Use run_dump_tests.
* gas/arm/archv6t2-bad.d, gas/arm/armv1.d, gas/arm/iwmmxt-bad.d
* gas/arm/r15-bad.d, gas/arm/req.d, gas/arm/t16-bad.d
* gas/arm/undefined.d, gas/arm/undefined_coff.d, gas/arm/vfp-bad.d:
New files.
* gas/arm/bignum1.d, gas/arm/mapping.d, gas/arm/pic.d:
Only run on ELF targets.
* gas/arm/tls.d, gas/arm/unwind.d: Only run on ELF targets.
Skip on VxWorks.
* gas/arm/tls_vxworks.d, gas/arm/unwind_vxworks.d: New files.
* gas/arm/thumb.d, gas/arm/thumb32.d: Don't run on aout or pe.
* gas/arm/le-fpconst.d: Only run on *-*-pe.
* gas/arm/inst.d: Skip on WinCE.
* gas/arm/wince_inst.d: Skip unless WinCE.
* gas/arm/el_segundo.d: Mark up for actual use; adjust
expectations.
* gas/arm/el_segundo.s: Remove irrelevant junk. Add padding
for a.out's sake.
gas/testsuite/
* lib/gas-defs.exp (regexp_diff): Pass test if last line is "#...".
ld/testsuite/
* lib/ld-lib.exp (regexp_diff): Pass test if last line is "#...".
* ld-elfweak/elfweak.exp: Run size2.d.
* ld-elfwaek/size2.d: New file.
* ld-elfwaek/size2a.s: New file.
* ld-elfwaek/size2b.s: New file.
* lib/gas-defs.exp (is_elf_format): Match frv-uclinux.
2003-09-18 Alexandre Oliva <aoliva@redhat.com>
* gas/frv/fdpic.s, gas/frv/fdpic.d: Renamed from ucpic*.
2003-09-15 Alexandre Oliva <aoliva@redhat.com>
* gas/frv/ucpic.s, gas/frv/ucpic.d: Use gr15 as PIC register. Use
gprel12 for rodata symbol and gotoff12 for sdata symbol.
2003-08-08 Alexandre Oliva <aoliva@redhat.com>
* gas/frv/ucpic.d: Test gotoff and gotofffuncdesc.
2003-08-04 Alexandre Oliva <aoliva@redhat.com>
* gas/frv/ucpic.d, gas/frv/ucpic.s: New.
* gas/frv/allinsns.exp: Run it.
* lib/gas-defs.exp (gas_run): Always log the command being run.
(gas_start): Likewise.
(regexp_diff): Make error reporting about non-existent files
consistent.
2003-09-30 Chris Demetriou <cgd@broadcom.com>
* config/tc-mips.c (mips_ip): Capitalize first word of
existing condition code warning, and add condition code
warnings for .ps instructions, and for bc1any[24][tf].
[ gas/testsuite/ChangeLog ]
2003-09-30 Chris Demetriou <cgd@broadcom.com>
* lib/gas-defs.exp (run_dump_test): If stderr file is specified
and there was no stderr output, compare anyway (i.e., cause a
test failure).
* gas/mips/mips64-mips3d.s: Add some new instructions to test warnings.
* gas/mips/mips64-mips3d.l: New file.
* gas/mips/mips64-mips3d.d: Use mips64-mips3d.l, and update for
changes to mips64-mips3d.s.
* gas/mips/mips64-mips3d-incl.d: Likewise.
* gas/mips/set-arch.l: New file.
* gas/mips/set-arch.d: Specify set-arch.l as stderr output to check.
* gas/mips/mips5.l: Make error messages match source.
* lib/gas-defs.exp (run_dump_test): Support new attribute "stderr"
which is a file used to regexp_diff the assembler's pruned stderr
output.
(write_file): New helper function to write a string into a file.
* gas/mips/empic.l: New file which matches empic tests' warnings.
* gas/mips/empic.d: Use empic.l.
