d871d47806
Move elf32.em and elf-generic.em functions
...
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.
2019-09-11 13:44:22 +09:30
ff6f4d9b2d
RISC-V: Add R_RISCV_DELETE, which marks bytes for deletion
...
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.
2017-10-19 09:19:32 -07:00
Alan Modra
Andreas Schwab
Jim Wilson
Palmer Dabbelt
Nick Clifton