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.
259 lines
9 KiB
C
259 lines
9 KiB
C
/* This file is tc-sh.h
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Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
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2003, 2004, 2005, 2006, 2007, 2008, 2010 Free Software Foundation, Inc.
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This file is part of GAS, the GNU Assembler.
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GAS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GAS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GAS; see the file COPYING. If not, write to
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the Free Software Foundation, 51 Franklin Street - Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#define TC_SH
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#define TARGET_ARCH bfd_arch_sh
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/* The type fixS is defined (to struct fix) in write.h, but write.h uses
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definitions from this file. To avoid problems with including write.h
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after the "right" definitions, don't; just forward-declare struct fix
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here. */
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struct fix;
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struct segment_info_struct;
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struct internal_reloc;
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/* Whether -relax was used. */
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extern int sh_relax;
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/* Whether -small was used. */
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extern int sh_small;
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/* Don't try to break words. */
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#define WORKING_DOT_WORD
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/* We require .long, et. al., to be aligned correctly. */
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#define md_cons_align(nbytes) sh_cons_align (nbytes)
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extern void sh_cons_align (int);
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/* We need to optimize expr with taking account of rs_align_test
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frags. */
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#ifdef OBJ_ELF
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#define md_optimize_expr(l,o,r) sh_optimize_expr (l, o, r)
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extern int sh_optimize_expr (expressionS *, operatorT, expressionS *);
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#endif
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/* When relaxing, we need to generate relocations for alignment
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directives. */
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#define HANDLE_ALIGN(frag) sh_handle_align (frag)
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extern void sh_handle_align (fragS *);
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#define MAX_MEM_FOR_RS_ALIGN_CODE (1 + 2)
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/* We need to force out some relocations when relaxing. */
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#define TC_FORCE_RELOCATION(fix) sh_force_relocation (fix)
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extern int sh_force_relocation (struct fix *);
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/* This macro decides whether a particular reloc is an entry in a
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switch table. It is used when relaxing, because the linker needs
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to know about all such entries so that it can adjust them if
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necessary. */
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#define SWITCH_TABLE(FIX) \
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((FIX)->fx_addsy != NULL \
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&& (FIX)->fx_subsy != NULL \
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&& S_GET_SEGMENT ((FIX)->fx_addsy) == text_section \
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&& S_GET_SEGMENT ((FIX)->fx_subsy) == text_section \
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&& ((FIX)->fx_r_type == BFD_RELOC_32 \
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|| (FIX)->fx_r_type == BFD_RELOC_16 \
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|| (FIX)->fx_r_type == BFD_RELOC_8))
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#define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEC) \
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(! SEG_NORMAL (SEC) \
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|| TC_FORCE_RELOCATION (FIX) \
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|| (sh_relax && SWITCH_TABLE (FIX)))
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/* Don't complain when we leave fx_subsy around. */
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#define TC_VALIDATE_FIX_SUB(FIX, SEG) \
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((md_register_arithmetic || (SEG) != reg_section) \
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&& sh_relax && SWITCH_TABLE (FIX))
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#define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section (FIX, SEC)
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extern long md_pcrel_from_section (struct fix *, segT);
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/* SH_COUNT relocs are allowed outside of frag.
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The target is also buggy and sets fix size too large for other relocs. */
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#define TC_FX_SIZE_SLACK(FIX) \
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((FIX)->fx_r_type == BFD_RELOC_SH_COUNT ? -1 : 2)
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#define IGNORE_NONSTANDARD_ESCAPES
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#define LISTING_HEADER \
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(!target_big_endian \
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? "Renesas / SuperH SH GAS Little Endian" \
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: "Renesas / SuperH SH GAS Big Endian")
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#define md_operand(x)
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extern const struct relax_type md_relax_table[];
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#define TC_GENERIC_RELAX_TABLE md_relax_table
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/* We record, for each section, whether we have most recently output a
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CODE reloc or a DATA reloc. */
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struct sh_segment_info_type
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{
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int in_code : 1;
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};
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#define TC_SEGMENT_INFO_TYPE struct sh_segment_info_type
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/* We call a routine to emit a reloc for a label, so that the linker
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can align loads and stores without crossing a label. */
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extern void sh_frob_label (symbolS *);
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#define tc_frob_label(sym) sh_frob_label (sym)
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/* We call a routine to flush pending output in order to output a DATA
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reloc when required. */
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extern void sh_flush_pending_output (void);
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#define md_flush_pending_output() sh_flush_pending_output ()
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#define tc_frob_file_before_adjust sh_frob_file
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extern void sh_frob_file (void);
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#ifdef OBJ_COFF
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/* COFF specific definitions. */
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#define COFF_MAGIC (!target_big_endian ? SH_ARCH_MAGIC_LITTLE : SH_ARCH_MAGIC_BIG)
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#define tc_coff_symbol_emit_hook(a) ; /* Not used. */
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#define TC_KEEP_FX_OFFSET 1
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#define SEG_NAME(SEG) segment_name (SEG)
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/* We align most sections to a 16 byte boundary. */
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#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \
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(strncmp (SEG_NAME (SEG), ".stabstr", 8) == 0 \
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? 0 \
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: ((strncmp (SEG_NAME (SEG), ".stab", 5) == 0 \
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|| strcmp (SEG_NAME (SEG), ".ctors") == 0 \
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|| strcmp (SEG_NAME (SEG), ".dtors") == 0) \
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? 2 \
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: (sh_small ? 2 : 4)))
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#endif /* OBJ_COFF */
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#ifdef OBJ_ELF
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/* ELF specific definitions. */
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/* Whether or not the target is big endian. */
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extern int target_big_endian;
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#ifdef TE_LINUX
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#define TARGET_FORMAT (!target_big_endian ? "elf32-sh-linux" : "elf32-shbig-linux")
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#elif defined(TE_NetBSD)
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#define TARGET_FORMAT (!target_big_endian ? "elf32-shl-nbsd" : "elf32-sh-nbsd")
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#elif defined TARGET_SYMBIAN
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#define TARGET_FORMAT (!target_big_endian ? "elf32-shl-symbian" : "elf32-sh-symbian")
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#elif defined (TE_VXWORKS)
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#define TARGET_FORMAT (!target_big_endian ? "elf32-shl-vxworks" : "elf32-sh-vxworks")
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#elif defined (TE_UCLINUX)
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#define TARGET_FORMAT sh_uclinux_target_format ()
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extern const char * sh_uclinux_target_format (void);
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#else
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#define TARGET_FORMAT (!target_big_endian ? "elf32-shl" : "elf32-sh")
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#endif
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#define elf_tc_final_processing sh_elf_final_processing
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extern void sh_elf_final_processing (void);
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#define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs. */
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#define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
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/* This is the relocation type for direct references to
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GLOBAL_OFFSET_TABLE. It comes up in complicated expressions such
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as _GLOBAL_OFFSET_TABLE_+[.-.L284], which cannot be expressed
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normally with the regular expressions. The fixup specified here
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when used at runtime implies that we should add the address of the
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GOT to the specified location, and as a result we have simplified
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the expression into something we can use. */
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#define TC_RELOC_GLOBAL_OFFSET_TABLE BFD_RELOC_SH_GOTPC
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#define tc_fix_adjustable(FIX) sh_fix_adjustable(FIX)
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extern bfd_boolean sh_fix_adjustable (struct fix *);
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/* Values passed to md_apply_fix don't include symbol values. */
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#define MD_APPLY_SYM_VALUE(FIX) 0
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/* This expression evaluates to true if the relocation is for a local object
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for which we still want to do the relocation at runtime. False if we
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are willing to perform this relocation while building the .o file.
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We can't resolve references to the GOT or the PLT when creating the
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object file, since these tables are only created by the linker.
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Also, if the symbol is global, weak, common or not defined, the
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assembler can't compute the appropriate reloc, since its location
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can only be determined at link time. */
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#define TC_FORCE_RELOCATION_LOCAL(FIX) \
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(!(FIX)->fx_pcrel \
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|| (FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \
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|| (FIX)->fx_r_type == BFD_RELOC_32_GOT_PCREL \
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|| (FIX)->fx_r_type == BFD_RELOC_SH_GOTPC \
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|| TC_FORCE_RELOCATION (FIX))
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#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) \
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((!md_register_arithmetic && (SEG) == reg_section) \
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|| (sh_relax && SWITCH_TABLE (FIX)))
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/* This keeps the subtracted symbol around, for use by PLT_PCREL
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relocs. */
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#define TC_FORCE_RELOCATION_SUB_ABS(FIX, SEG) \
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((FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \
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|| (!md_register_arithmetic && (SEG) == reg_section))
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/* Don't complain when we leave fx_subsy around. */
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#undef TC_VALIDATE_FIX_SUB
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#define TC_VALIDATE_FIX_SUB(FIX, SEG) \
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((md_register_arithmetic || (SEG) != reg_section) \
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&& ((FIX)->fx_r_type == BFD_RELOC_32_PLT_PCREL \
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|| (sh_relax && SWITCH_TABLE (FIX))))
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#define md_parse_name(name, exprP, mode, nextcharP) \
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sh_parse_name ((name), (exprP), (mode), (nextcharP))
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int sh_parse_name (char const *, expressionS *,
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enum expr_mode, char *);
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#define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP) \
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sh_cons_fix_new ((FRAG), (OFF), (LEN), (EXP))
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void sh_cons_fix_new (fragS *, int, int, expressionS *);
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/* This is used to construct expressions out of @GOTOFF, @PLT and @GOT
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symbols. The relocation type is stored in X_md. */
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#define O_PIC_reloc O_md1
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#define TARGET_USE_CFIPOP 1
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#define tc_cfi_frame_initial_instructions sh_cfi_frame_initial_instructions
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extern void sh_cfi_frame_initial_instructions (void);
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#define tc_regname_to_dw2regnum sh_regname_to_dw2regnum
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extern int sh_regname_to_dw2regnum (char *);
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/* All SH instructions are multiples of 16 bits. */
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#define DWARF2_LINE_MIN_INSN_LENGTH 2
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#define DWARF2_DEFAULT_RETURN_COLUMN 17
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#define DWARF2_CIE_DATA_ALIGNMENT (-4)
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#endif /* OBJ_ELF */
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#define H_TICK_HEX 1
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