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. |
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.. | ||
emulparams | ||
emultempl | ||
po | ||
scripttempl | ||
testsuite | ||
aclocal.m4 | ||
ChangeLog | ||
ChangeLog-0001 | ||
ChangeLog-0203 | ||
ChangeLog-2004 | ||
ChangeLog-2005 | ||
ChangeLog-2006 | ||
ChangeLog-2007 | ||
ChangeLog-2008 | ||
ChangeLog-2009 | ||
ChangeLog-9197 | ||
ChangeLog-9899 | ||
config.in | ||
configure | ||
configure.host | ||
configure.in | ||
configure.tgt | ||
deffile.h | ||
deffilep.y | ||
dep-in.sed | ||
elf-hints-local.h | ||
fdl.texi | ||
gen-doc.texi | ||
genscrba.sh | ||
genscripts.sh | ||
h8-doc.texi | ||
ld.h | ||
ld.texinfo | ||
ldcref.c | ||
ldctor.c | ||
ldctor.h | ||
ldemul.c | ||
ldemul.h | ||
ldexp.c | ||
ldexp.h | ||
ldfile.c | ||
ldfile.h | ||
ldgram.y | ||
ldint.texinfo | ||
ldlang.c | ||
ldlang.h | ||
ldlex-wrapper.c | ||
ldlex.h | ||
ldlex.l | ||
ldmain.c | ||
ldmain.h | ||
ldmisc.c | ||
ldmisc.h | ||
ldver.c | ||
ldver.h | ||
ldwrite.c | ||
ldwrite.h | ||
lexsup.c | ||
MAINTAINERS | ||
Makefile.am | ||
Makefile.in | ||
mri.c | ||
mri.h | ||
NEWS | ||
pe-dll.c | ||
pe-dll.h | ||
pep-dll.c | ||
pep-dll.h | ||
README | ||
stamp-h.in | ||
sysdep.h | ||
TODO |
README for LD This is the GNU linker. It is distributed with other "binary utilities" which should be in ../binutils. See ../binutils/README for more general notes, including where to send bug reports. There are many features of the linker: * The linker uses a Binary File Descriptor library (../bfd) that it uses to read and write object files. This helps insulate the linker itself from the format of object files. * The linker supports a number of different object file formats. It can even handle multiple formats at once: Read two input formats and write a third. * The linker can be configured for cross-linking. * The linker supports a control language. * There is a user manual (ld.texinfo), as well as the beginnings of an internals manual (ldint.texinfo). Installation ============ See ../binutils/README. If you want to make a cross-linker, you may want to specify a different search path of -lfoo libraries than the default. You can do this by setting the LIB_PATH variable in ./Makefile or using the --with-lib-path configure switch. To build just the linker, make the target all-ld from the top level directory (one directory above this one). Porting to a new target ======================= See the ldint.texinfo manual. Reporting bugs etc =========================== See ../binutils/README. Known problems ============== The Solaris linker normally exports all dynamic symbols from an executable. The GNU linker does not do this by default. This is because the GNU linker tries to present the same interface for all similar targets (in this case, all native ELF targets). This does not matter for normal programs, but it can make a difference for programs which try to dlopen an executable, such as PERL or Tcl. You can make the GNU linker export all dynamic symbols with the -E or --export-dynamic command line option. HP/UX 9.01 has a shell bug that causes the linker scripts to be generated incorrectly. The symptom of this appears to be "fatal error - scanner input buffer overflow" error messages. There are various workarounds to this: * Build and install bash, and build with "make SHELL=bash". * Update to a version of HP/UX with a working shell (e.g., 9.05). * Replace "(. ${srcdir}/scripttempl/${SCRIPT_NAME}.sc)" in genscripts.sh with "sh ${srcdir}..." (no parens) and make sure the emulparams script used exports any shell variables it sets.