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Many ELF linker targets support multiple "emulations" and thus have
multiple copies of elf32.em being compiled and linked into ld. This
patch moves much of elf32.em and elf-generic.em into files which will
be compiled just once, resulting in a 20% decrease in ld size for
--enable-targets=all.
* Makefile.am (ALL_EMUL_EXTRA_OFILES): Add ldelf and ldelfgen.
(CFILES, HFILES, EXTRA_ld_new_SOURCES): Likewise.
* configure.tgt: Formatting.
(targ_extra_ofiles): Init to ldelf.o ldelfgen.o, reset to just
ldelfgen.o for generic ELF targets, and empty for non-ELF.
* emultempl/aarch64elf.em (gldaarch64_layout_sections_again): Use
ldelf_map_segments.
(gld${EMULATION_NAME}_after_allocation): Likewise.
(real_func, aarch64_for_each_input_file_wrapper),
(aarch64_lang_for_each_input_file): Delete.
(lang_for_each_input_file): Don't define.
* emultempl/alphaelf.em (alpha_after_parse): Use ldelf_map_segments.
* emultempl/armelf.em (gldarm_layout_sections_again): Likewise.
(gld${EMULATION_NAME}_after_allocation): Likewise.
(real_func, arm_for_each_input_file_wrapper),
(arm_lang_for_each_input_file): Delete.
(lang_for_each_input_file): Don't define.
* emultempl/cr16elf.em (cr16elf_after_parse): Use ldelf_map_segments.
* emultempl/crxelf.em (crxelf_after_parse): Likewise. Delete
declaration.
* emultempl/cskyelf.em (gldcsky_layout_sections_again): Use
ldelf_map_segments.
(gld${EMULATION_NAME}_after_allocation): Likewise.
(real_func, csky_for_each_input_file_wrapper),
(csky_lang_for_each_input_file): Delete.
(lang_for_each_input_file): Don't define.
* emultempl/genelf.em: Include ldelfgen.h.
(gld${EMULATION_NAME}_before_allocation): Use ldelf_map_segments.
* emultempl/hppaelf.em (hppaelf_after_parse): Likewise.
(hppaelf_layout_sections_again): Likewise.
(gld${EMULATION_NAME}_after_allocation): Likewise.
(real_func, hppa_for_each_input_file_wrapper),
(hppa_lang_for_each_input_file): Delete.
(lang_for_each_input_file): Don't define.
* emultempl/ia64elf.em (ia64elf_after_parse): Use ldelf_map_segments.
* emultempl/m68hc1xelf.em (real_func),
(m68hc11_for_each_input_file_wrapper),
(m68hc11_lang_for_each_input_file): Delete.
(lang_for_each_input_file): Don't define.
* emultempl/metagelf.em (metagelf_layout_sections_again): Use
ldelf_map_segments.
(gld${EMULATION_NAME}_after_allocation): Likewise.
(real_func, metag_for_each_input_file_wrapper),
(metag_lang_for_each_input_file): Delete.
(lang_for_each_input_file): Don't define.
* emultempl/mipself.em (real_func),
(mips_for_each_input_file_wrapper),
(mips_lang_for_each_input_file): Delete.
(lang_for_each_input_file): Don't define.
* emultempl/mmo.em: Don't include elf-bfd.h, do include ldelfgen.h.
(gld${EMULATION_NAME}_after_allocation): Use ldelf_map_segments.
* emultempl/nds32elf.em (nds32_elf_after_parse): Use ldelf_after_parse.
(nds32_elf_after_allocation): Comment fix.
* emultempl/nios2elf.em (nios2elf_layout_sections_again): Use
ldelf_map_segments.
(gld${EMULATION_NAME}_after_allocation): Likewise.
(real_func, nios2_for_each_input_file_wrapper),
(nios2_lang_for_each_input_file): Delete.
(lang_for_each_input_file): Don't define.
* emultempl/ppc32elf.em (gld${EMULATION_NAME}_load_symbols): Delete
declaration.
(ppc_recognized_file): Call ldelf_load_symbols.
* emultempl/ppc64elf.em (ppc_layout_sections_again): Likewise.
(gld${EMULATION_NAME}_after_allocation): Likewise.
(real_func, ppc_for_each_input_file_wrapper),
(ppc_lang_for_each_input_file): Delete.
(lang_for_each_input_file): Don't define.
(gld${EMULATION_NAME}_load_symbols): Don't declare.
(ppc64_recognized_file): Call ldelf_load_symbols.
* emultempl/riscvelf.em (gld${EMULATION_NAME}_after_allocation):
Use ldelf_map_segments.
* emultempl/spuelf.em (spu_place_special_section): Use
ldelf_place_orphan.
* emultempl/tic6xdsbt.em (gld${EMULATION_NAME}_after_allocation):
Use ldelf_map_segments.
* emultempl/vms.em: Include ldelfgen.h.
(gld${EMULATION_NAME}_after_allocation): Use ldelf_map_segments.
* emultempl/elf32.em: Remove unnecessary headers, include ldelf.h
and ldelfgen.h. Move much of file content to..
* ldelf.c: ..here. New file.
* ldelf.h: New file.
* emultempl/elf-generic.em: Move gld${EMULATION_NAME}_map_segments..
* ldelfgen.c: ..to here.
* ldelfgen.h: New file.
* ldlang.c (lang_for_each_input_file): Adjust to only call func
on real files.
(lang_for_each_file): Likewise.
* po/SRC-POTFILES.in: Regenerate.
* Makefile.in: Regenerate.
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PR ld/22949
* emultempl/riscvelf.em (riscv_elf_before_allocation): Don't
enable relaxation in relocatable link.
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PR 22920
* emultempl/riscvelf.em (riscv_create_output_section_statements): New.
(LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS): New.
* testsuite/ld-elf/pr21884.d (#notarget): Add riscv*-*-*.
* testsuite/ld-unique/pr21529.d (#notarget): Likewise.
* testsuite/ld-srec/srec.exp (run_srec_test): For riscv*-*-* target,
call setup_xfail.
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We currently delete bytes by shifting an entire BFD backwards to
overwrite the bytes we no longer need. The result is that relaxing a
BFD is quadratic time.
This patch adds an additional relocation that specifies a byte range
that will be deleted from the final object file, and adds a relaxation
pass (between the existing passes that delete bytes and the alignment
pass) that actually deletes the bytes. Note that deletion is still
quadratic time, and nothing uses R_RISCV_DELETE yet.
I've been meaning to go convert all the other relaxations to use
R_RISCV_DELETE and then make it faster, but this patch has been sitting
around for months so it looks like that won't happen for a bit. The
PCREL->GPREL relaxation that comes next uses this, and since we've been
using these two patches out of tree since I wrote them months ago I
figure it's better to just get them in now. I (or someone else :)) can
convert all the relocations later...
R_RISCV_DELETE will never be emitted into ELF objects, so therefor isn't
exposed to the rest of binutils. As such, we're not considering this as
part of the ABI.
bfd/ChangeLog
2017-10-19 Palmer Dabbelt <palmer@dabbelt.com>
* elfnn-riscv (R_RISCV_DELETE): New define.
(_bfd_riscv_relax_delete): New function.
(perform_relocation): Handle R_RISCV_DELETE.
(_bfd_riscv_relax_section): Likewise.
ld/ChangeLog
2017-10-19 Palmer Dabbelt <palmer@dabbelt.com>
* emultempl/riscvelf.em (riscv_elf_before_allocation): Add a
third relaxation pass.
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* emultempl/aarch64elf.em: Wrap einfo strings in _(). Formatting.
* emultempl/aix.em: Likewise.
* emultempl/armcoff.em: Likewise.
* emultempl/armelf.em: Likewise.
* emultempl/avrelf.em: Likewise.
* emultempl/beos.em: Likewise.
* emultempl/cr16elf.em: Likewise.
* emultempl/elf-generic.em: Likewise.
* emultempl/elf32.em: Likewise.
* emultempl/genelf.em: Likewise.
* emultempl/hppaelf.em: Likewise.
* emultempl/linux.em: Likewise.
* emultempl/lnk960.em: Likewise.
* emultempl/m68hc1xelf.em: Likewise.
* emultempl/m68kcoff.em: Likewise.
* emultempl/m68kelf.em: Likewise.
* emultempl/metagelf.em: Likewise.
* emultempl/mipself.em: Likewise.
* emultempl/mmix-elfnmmo.em: Likewise.
* emultempl/mmo.em: Likewise.
* emultempl/msp430.em: Likewise.
* emultempl/nds32elf.em: Likewise.
* emultempl/nios2elf.em: Likewise.
* emultempl/pe.em: Likewise.
* emultempl/pep.em: Likewise.
* emultempl/ppc32elf.em: Likewise.
* emultempl/ppc64elf.em: Likewise.
* emultempl/riscvelf.em: Likewise.
* emultempl/s390.em: Likewise.
* emultempl/scoreelf.em: Likewise.
* emultempl/spuelf.em: Likewise.
* emultempl/sunos.em: Likewise.
* emultempl/tic6xdsbt.em: Likewise.
* emultempl/v850elf.em: Likewise.
* emultempl/vms.em: Likewise.
* emultempl/vxworks.em: Likewise.
* ldcref.c: Likewise.
* ldlang.c: Likewise.
* ldlex.l: Likewise.
* ldmain.c: Likewise.
* pe-dll.c: Likewise.
* plugin.c: Likewise.
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bfd * Makefile.am: Add entries for riscv32-elf and riscv64-elf.
* config.bdf: Likewise.
* configure.ac: Likewise.
* Makefile.in: Regenerate.
* configure: Regenerate.
* archures.c: Add bfd_riscv_arch.
* reloc.c: Add riscv relocs.
* targets.c: Add riscv_elf32_vec and riscv_elf64_vec.
* bfd-in2.h: Regenerate.
* libbfd.h: Regenerate.
* elf-bfd.h: Add RISCV_ELF_DATA to enum elf_target_id.
* elfnn-riscv.c: New file.
* elfxx-riscv.c: New file.
* elfxx-riscv.h: New file.
binutils* readelf.c (guess_is_rela): Add EM_RISCV.
(get_machine_name): Likewise.
(dump_relocations): Add support for riscv relocations.
(get_machine_flags): Add support for riscv flags.
(is_32bit_abs_reloc): Add R_RISCV_32.
(is_64bit_abs_reloc): Add R_RISCV_64.
(is_none_reloc): Add R_RISCV_NONE.
* testsuite/binutils-all/objdump.exp (cpus_expected): Add riscv.
Expect the debug_ranges test to fail.
gas * Makefile.am: Add riscv files.
* Makefile.in: Regenerate.
* NEWS: Mention the support for this architecture.
* configure.in: Define a default architecture.
* configure: Regenerate.
* configure.tgt: Add entries for riscv.
* doc/as.texinfo: Likewise.
* testsuite/gas/all/gas.exp: Expect the redef tests to fail.
* testsuite/gas/elf/elf.exp: Expect the groupauto tests to fail.
* config/tc-riscv.c: New file.
* config/tc-riscv.h: New file.
* doc/c-riscv.texi: New file.
* testsuite/gas/riscv: New directory.
* testsuite/gas/riscv/riscv.exp: New file.
* testsuite/gas/riscv/t_insns.d: New file.
* testsuite/gas/riscv/t_insns.s: New file.
ld * Makefile.am: Add riscv files.
* Makefile.in: Regenerate.
* NEWS: Mention the support for this target.
* configure.tgt: Add riscv entries.
* emulparams/elf32lriscv-defs.sh: New file.
* emulparams/elf32lriscv.sh: New file.
* emulparams/elf64lriscv-defs.sh: New file.
* emulparams/elf64lriscv.sh: New file.
* emultempl/riscvelf.em: New file.
opcodes * configure.ac: Add entry for bfd_riscv_arch.
* configure: Regenerate.
* disassemble.c (disassembler): Add support for riscv.
(disassembler_usage): Likewise.
* riscv-dis.c: New file.
* riscv-opc.c: New file.
include * dis-asm.h: Add prototypes for print_insn_riscv and
print_riscv_disassembler_options.
* elf/riscv.h: New file.
* opcode/riscv-opc.h: New file.
* opcode/riscv.h: New file.
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