mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-09 04:21:49 +08:00
8e45593ff3
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.
|
||
|---|---|---|
| .. | ||
| doc | ||
| hosts | ||
| po | ||
| acinclude.m4 | ||
| aclocal.m4 | ||
| aix5ppc-core.c | ||
| aix386-core.c | ||
| aout0.c | ||
| aout32.c | ||
| aout64.c | ||
| aout-adobe.c | ||
| aout-arm.c | ||
| aout-cris.c | ||
| aout-ns32k.c | ||
| aout-sparcle.c | ||
| aout-target.h | ||
| aout-tic30.c | ||
| aoutf1.h | ||
| aoutx.h | ||
| archive64.c | ||
| archive.c | ||
| archures.c | ||
| armnetbsd.c | ||
| bfd-in2.h | ||
| bfd-in.h | ||
| bfd.c | ||
| bfd.m4 | ||
| bfdio.c | ||
| bfdwin.c | ||
| binary.c | ||
| bout.c | ||
| cache.c | ||
| cf-i386lynx.c | ||
| cf-sparclynx.c | ||
| ChangeLog | ||
| ChangeLog-0001 | ||
| ChangeLog-0203 | ||
| ChangeLog-2004 | ||
| ChangeLog-2005 | ||
| ChangeLog-2006 | ||
| ChangeLog-2007 | ||
| ChangeLog-2008 | ||
| ChangeLog-2009 | ||
| ChangeLog-9193 | ||
| ChangeLog-9495 | ||
| ChangeLog-9697 | ||
| ChangeLog-9899 | ||
| cisco-core.c | ||
| coff64-rs6000.c | ||
| coff-alpha.c | ||
| coff-apollo.c | ||
| coff-arm.c | ||
| coff-aux.c | ||
| coff-go32.c | ||
| coff-h8300.c | ||
| coff-h8500.c | ||
| coff-i386.c | ||
| coff-i860.c | ||
| coff-i960.c | ||
| coff-ia64.c | ||
| coff-m68k.c | ||
| coff-m88k.c | ||
| coff-maxq.c | ||
| coff-mcore.c | ||
| coff-mips.c | ||
| coff-or32.c | ||
| coff-pmac.c | ||
| coff-ppc.c | ||
| coff-rs6000.c | ||
| coff-sh.c | ||
| coff-sparc.c | ||
| coff-stgo32.c | ||
| coff-svm68k.c | ||
| coff-tic4x.c | ||
| coff-tic30.c | ||
| coff-tic54x.c | ||
| coff-tic80.c | ||
| coff-u68k.c | ||
| coff-w65.c | ||
| coff-we32k.c | ||
| coff-x86_64.c | ||
| coff-z8k.c | ||
| coff-z80.c | ||
| coffcode.h | ||
| coffgen.c | ||
| cofflink.c | ||
| coffswap.h | ||
| compress.c | ||
| config.bfd | ||
| config.in | ||
| configure | ||
| configure.com | ||
| configure.host | ||
| configure.in | ||
| COPYING | ||
| corefile.c | ||
| cpu-alpha.c | ||
| cpu-arc.c | ||
| cpu-arm.c | ||
| cpu-avr.c | ||
| cpu-bfin.c | ||
| cpu-cr16.c | ||
| cpu-cr16c.c | ||
| cpu-cris.c | ||
| cpu-crx.c | ||
| cpu-d10v.c | ||
| cpu-d30v.c | ||
| cpu-dlx.c | ||
| cpu-fr30.c | ||
| cpu-frv.c | ||
| cpu-h8300.c | ||
| cpu-h8500.c | ||
| cpu-hppa.c | ||
| cpu-i370.c | ||
| cpu-i386.c | ||
| cpu-i860.c | ||
| cpu-i960.c | ||
| cpu-ia64-opc.c | ||
| cpu-ia64.c | ||
| cpu-ip2k.c | ||
| cpu-iq2000.c | ||
| cpu-l1om.c | ||
| cpu-lm32.c | ||
| cpu-m32c.c | ||
| cpu-m32r.c | ||
| cpu-m68hc11.c | ||
| cpu-m68hc12.c | ||
| cpu-m68k.c | ||
| cpu-m88k.c | ||
| cpu-m10200.c | ||
| cpu-m10300.c | ||
| cpu-maxq.c | ||
| cpu-mcore.c | ||
| cpu-mep.c | ||
| cpu-microblaze.c | ||
| cpu-mips.c | ||
| cpu-mmix.c | ||
| cpu-moxie.c | ||
| cpu-msp430.c | ||
| cpu-mt.c | ||
| cpu-ns32k.c | ||
| cpu-openrisc.c | ||
| cpu-or32.c | ||
| cpu-pdp11.c | ||
| cpu-pj.c | ||
| cpu-plugin.c | ||
| cpu-powerpc.c | ||
| cpu-rs6000.c | ||
| cpu-rx.c | ||
| cpu-s390.c | ||
| cpu-score.c | ||
| cpu-sh.c | ||
| cpu-sparc.c | ||
| cpu-spu.c | ||
| cpu-tic4x.c | ||
| cpu-tic6x.c | ||
| cpu-tic30.c | ||
| cpu-tic54x.c | ||
| cpu-tic80.c | ||
| cpu-v850.c | ||
| cpu-vax.c | ||
| cpu-w65.c | ||
| cpu-we32k.c | ||
| cpu-xc16x.c | ||
| cpu-xstormy16.c | ||
| cpu-xtensa.c | ||
| cpu-z8k.c | ||
| cpu-z80.c | ||
| demo64.c | ||
| dep-in.sed | ||
| dwarf1.c | ||
| dwarf2.c | ||
| ecoff.c | ||
| ecofflink.c | ||
| ecoffswap.h | ||
| elf32-am33lin.c | ||
| elf32-arc.c | ||
| elf32-arm.c | ||
| elf32-avr.c | ||
| elf32-avr.h | ||
| elf32-bfin.c | ||
| elf32-cr16.c | ||
| elf32-cr16c.c | ||
| elf32-cris.c | ||
| elf32-crx.c | ||
| elf32-d10v.c | ||
| elf32-d30v.c | ||
| elf32-dlx.c | ||
| elf32-fr30.c | ||
| elf32-frv.c | ||
| elf32-gen.c | ||
| elf32-h8300.c | ||
| elf32-hppa.c | ||
| elf32-hppa.h | ||
| elf32-i370.c | ||
| elf32-i386.c | ||
| elf32-i860.c | ||
| elf32-i960.c | ||
| elf32-ip2k.c | ||
| elf32-iq2000.c | ||
| elf32-lm32.c | ||
| elf32-m32c.c | ||
| elf32-m32r.c | ||
| elf32-m68hc1x.c | ||
| elf32-m68hc1x.h | ||
| elf32-m68hc11.c | ||
| elf32-m68hc12.c | ||
| elf32-m68k.c | ||
| elf32-m88k.c | ||
| elf32-mcore.c | ||
| elf32-mep.c | ||
| elf32-microblaze.c | ||
| elf32-mips.c | ||
| elf32-moxie.c | ||
| elf32-msp430.c | ||
| elf32-mt.c | ||
| elf32-openrisc.c | ||
| elf32-or32.c | ||
| elf32-pj.c | ||
| elf32-ppc.c | ||
| elf32-ppc.h | ||
| elf32-rx.c | ||
| elf32-s390.c | ||
| elf32-score7.c | ||
| elf32-score.c | ||
| elf32-score.h | ||
| elf32-sh64-com.c | ||
| elf32-sh64.c | ||
| elf32-sh64.h | ||
| elf32-sh-relocs.h | ||
| elf32-sh-symbian.c | ||
| elf32-sh.c | ||
| elf32-sparc.c | ||
| elf32-spu.c | ||
| elf32-spu.h | ||
| elf32-tic6x.c | ||
| elf32-tic6x.h | ||
| elf32-v850.c | ||
| elf32-vax.c | ||
| elf32-xc16x.c | ||
| elf32-xstormy16.c | ||
| elf32-xtensa.c | ||
| elf32.c | ||
| elf64-alpha.c | ||
| elf64-gen.c | ||
| elf64-hppa.c | ||
| elf64-hppa.h | ||
| elf64-mips.c | ||
| elf64-mmix.c | ||
| elf64-ppc.c | ||
| elf64-ppc.h | ||
| elf64-s390.c | ||
| elf64-sh64.c | ||
| elf64-sparc.c | ||
| elf64-x86-64.c | ||
| elf64.c | ||
| elf-attrs.c | ||
| elf-bfd.h | ||
| elf-eh-frame.c | ||
| elf-hppa.h | ||
| elf-ifunc.c | ||
| elf-m10200.c | ||
| elf-m10300.c | ||
| elf-strtab.c | ||
| elf-vxworks.c | ||
| elf-vxworks.h | ||
| elf.c | ||
| elfcode.h | ||
| elfcore.h | ||
| elflink.c | ||
| elfn32-mips.c | ||
| elfxx-ia64.c | ||
| elfxx-mips.c | ||
| elfxx-mips.h | ||
| elfxx-sparc.c | ||
| elfxx-sparc.h | ||
| elfxx-target.h | ||
| epoc-pe-arm.c | ||
| epoc-pei-arm.c | ||
| format.c | ||
| freebsd.h | ||
| gen-aout.c | ||
| genlink.h | ||
| go32stub.h | ||
| hash.c | ||
| host-aout.c | ||
| hp300bsd.c | ||
| hp300hpux.c | ||
| hppabsd-core.c | ||
| hpux-core.c | ||
| i386aout.c | ||
| i386bsd.c | ||
| i386dynix.c | ||
| i386freebsd.c | ||
| i386linux.c | ||
| i386lynx.c | ||
| i386mach3.c | ||
| i386msdos.c | ||
| i386netbsd.c | ||
| i386os9k.c | ||
| ieee.c | ||
| ihex.c | ||
| init.c | ||
| irix-core.c | ||
| libaout.h | ||
| libbfd-in.h | ||
| libbfd.c | ||
| libbfd.h | ||
| libcoff-in.h | ||
| libcoff.h | ||
| libecoff.h | ||
| libhppa.h | ||
| libieee.h | ||
| libnlm.h | ||
| liboasys.h | ||
| libpei.h | ||
| libxcoff.h | ||
| linker.c | ||
| lynx-core.c | ||
| m68k4knetbsd.c | ||
| m68klinux.c | ||
| m68knetbsd.c | ||
| m88kmach3.c | ||
| m88kopenbsd.c | ||
| mach-o-i386.c | ||
| mach-o-target.c | ||
| mach-o-x86-64.c | ||
| mach-o.c | ||
| mach-o.h | ||
| MAINTAINERS | ||
| Makefile.am | ||
| Makefile.in | ||
| makefile.vms | ||
| mep-relocs.pl | ||
| merge.c | ||
| mipsbsd.c | ||
| mmo.c | ||
| netbsd-core.c | ||
| netbsd.h | ||
| newsos3.c | ||
| nlm32-alpha.c | ||
| nlm32-i386.c | ||
| nlm32-ppc.c | ||
| nlm32-sparc.c | ||
| nlm32.c | ||
| nlm64.c | ||
| nlm-target.h | ||
| nlm.c | ||
| nlmcode.h | ||
| nlmswap.h | ||
| ns32k.h | ||
| ns32knetbsd.c | ||
| oasys.c | ||
| opncls.c | ||
| osf-core.c | ||
| pc532-mach.c | ||
| pdp11.c | ||
| pe-arm-wince.c | ||
| pe-arm.c | ||
| pe-i386.c | ||
| pe-mcore.c | ||
| pe-mips.c | ||
| pe-ppc.c | ||
| pe-sh.c | ||
| pe-x86_64.c | ||
| pef-traceback.h | ||
| pef.c | ||
| pef.h | ||
| pei-arm-wince.c | ||
| pei-arm.c | ||
| pei-i386.c | ||
| pei-ia64.c | ||
| pei-mcore.c | ||
| pei-mips.c | ||
| pei-ppc.c | ||
| pei-sh.c | ||
| pei-x86_64.c | ||
| peicode.h | ||
| peXXigen.c | ||
| plugin.c | ||
| plugin.h | ||
| PORTING | ||
| ppcboot.c | ||
| ptrace-core.c | ||
| README | ||
| reloc16.c | ||
| reloc.c | ||
| riscix.c | ||
| rs6000-core.c | ||
| sco5-core.c | ||
| section.c | ||
| simple.c | ||
| som.c | ||
| som.h | ||
| sparclinux.c | ||
| sparclynx.c | ||
| sparcnetbsd.c | ||
| srec.c | ||
| stab-syms.c | ||
| stabs.c | ||
| stamp-h.in | ||
| sunos.c | ||
| syms.c | ||
| sysdep.h | ||
| targets.c | ||
| targmatch.sed | ||
| tekhex.c | ||
| ticoff.h | ||
| TODO | ||
| trad-core.c | ||
| vax1knetbsd.c | ||
| vaxbsd.c | ||
| vaxnetbsd.c | ||
| verilog.c | ||
| versados.c | ||
| version.h | ||
| vms-alpha.c | ||
| vms-lib.c | ||
| vms-misc.c | ||
| vms.h | ||
| warning.m4 | ||
| xcoff-target.h | ||
| xcofflink.c | ||
| xsym.c | ||
| xsym.h | ||
| xtensa-isa.c | ||
| xtensa-modules.c | ||
BFD is an object file library. It permits applications to use the same routines to process object files regardless of their format. BFD is used by the GNU debugger, assembler, linker, and the binary utilities. The documentation on using BFD is scanty and may be occasionally incorrect. Pointers to documentation problems, or an entirely rewritten manual, would be appreciated. There is some BFD internals documentation in doc/bfdint.texi which may help programmers who want to modify BFD. BFD is normally built as part of another package. See the build instructions for that package, probably in a README file in the appropriate directory. BFD supports the following configure options: --target=TARGET The default target for which to build the library. TARGET is a configuration target triplet, such as sparc-sun-solaris. --enable-targets=TARGET,TARGET,TARGET... Additional targets the library should support. To include support for all known targets, use --enable-targets=all. --enable-64-bit-bfd Include support for 64 bit targets. This is automatically turned on if you explicitly request a 64 bit target, but not for --enable-targets=all. This requires a compiler with a 64 bit integer type, such as gcc. --enable-shared Build BFD as a shared library. --with-mmap Use mmap when accessing files. This is faster on some hosts, but slower on others. It may not work on all hosts. Report bugs with BFD to bug-binutils@gnu.org. Patches are encouraged. When sending patches, always send the output of diff -u or diff -c from the original file to the new file. Do not send default diff output. Do not make the diff from the new file to the original file. Remember that any patch must not break other systems. Remember that BFD must support cross compilation from any host to any target, so patches which use ``#ifdef HOST'' are not acceptable. Please also read the ``Reporting Bugs'' section of the gcc manual. Bug reports without patches will be remembered, but they may never get fixed until somebody volunteers to fix them.