mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-27 04:52:05 +08:00
fd3619828e
This large patch removes the unnecessary bfd parameter from various bfd section macros and functions. The bfd is hardly ever used and if needed for the bfd_set_section_* or bfd_rename_section functions can be found via section->owner except for the com, und, abs, and ind std_section special sections. Those sections shouldn't be modified anyway. The patch also removes various bfd_get_section_<field> macros, replacing their use with bfd_section_<field>, and adds bfd_set_section_lma. I've also fixed a minor bug in gas where compressed section renaming was done directly rather than calling bfd_rename_section. This would have broken bfd_get_section_by_name and similar functions, but that hardly mattered at such a late stage in gas processing. bfd/ * bfd-in.h (bfd_get_section_name, bfd_get_section_vma), (bfd_get_section_lma, bfd_get_section_alignment), (bfd_get_section_size, bfd_get_section_flags), (bfd_get_section_userdata): Delete. (bfd_section_name, bfd_section_size, bfd_section_vma), (bfd_section_lma, bfd_section_alignment): Lose bfd parameter. (bfd_section_flags, bfd_section_userdata): New. (bfd_is_com_section): Rename parameter. * section.c (bfd_set_section_userdata, bfd_set_section_vma), (bfd_set_section_alignment, bfd_set_section_flags, bfd_rename_section), (bfd_set_section_size): Delete bfd parameter, rename section parameter. (bfd_set_section_lma): New. * bfd-in2.h: Regenerate. * mach-o.c (bfd_mach_o_init_section_from_mach_o): Delete bfd param, update callers. * aoutx.h, * bfd.c, * coff-alpha.c, * coff-arm.c, * coff-mips.c, * coff64-rs6000.c, * coffcode.h, * coffgen.c, * cofflink.c, * compress.c, * ecoff.c, * elf-eh-frame.c, * elf-hppa.h, * elf-ifunc.c, * elf-m10200.c, * elf-m10300.c, * elf-properties.c, * elf-s390-common.c, * elf-vxworks.c, * elf.c, * elf32-arc.c, * elf32-arm.c, * elf32-avr.c, * elf32-bfin.c, * elf32-cr16.c, * elf32-cr16c.c, * elf32-cris.c, * elf32-crx.c, * elf32-csky.c, * elf32-d10v.c, * elf32-epiphany.c, * elf32-fr30.c, * elf32-frv.c, * elf32-ft32.c, * elf32-h8300.c, * elf32-hppa.c, * elf32-i386.c, * elf32-ip2k.c, * elf32-iq2000.c, * elf32-lm32.c, * elf32-m32c.c, * elf32-m32r.c, * elf32-m68hc1x.c, * elf32-m68k.c, * elf32-mcore.c, * elf32-mep.c, * elf32-metag.c, * elf32-microblaze.c, * elf32-moxie.c, * elf32-msp430.c, * elf32-mt.c, * elf32-nds32.c, * elf32-nios2.c, * elf32-or1k.c, * elf32-ppc.c, * elf32-pru.c, * elf32-rl78.c, * elf32-rx.c, * elf32-s390.c, * elf32-score.c, * elf32-score7.c, * elf32-sh.c, * elf32-spu.c, * elf32-tic6x.c, * elf32-tilepro.c, * elf32-v850.c, * elf32-vax.c, * elf32-visium.c, * elf32-xstormy16.c, * elf32-xtensa.c, * elf64-alpha.c, * elf64-bpf.c, * elf64-hppa.c, * elf64-ia64-vms.c, * elf64-mmix.c, * elf64-ppc.c, * elf64-s390.c, * elf64-sparc.c, * elf64-x86-64.c, * elflink.c, * elfnn-aarch64.c, * elfnn-ia64.c, * elfnn-riscv.c, * elfxx-aarch64.c, * elfxx-mips.c, * elfxx-sparc.c, * elfxx-tilegx.c, * elfxx-x86.c, * i386msdos.c, * linker.c, * mach-o.c, * mmo.c, * opncls.c, * pdp11.c, * pei-x86_64.c, * peicode.h, * reloc.c, * section.c, * syms.c, * vms-alpha.c, * xcofflink.c: Update throughout for bfd section macro and function changes. binutils/ * addr2line.c, * bucomm.c, * coffgrok.c, * dlltool.c, * nm.c, * objcopy.c, * objdump.c, * od-elf32_avr.c, * od-macho.c, * od-xcoff.c, * prdbg.c, * rdcoff.c, * rddbg.c, * rescoff.c, * resres.c, * size.c, * srconv.c, * strings.c, * windmc.c: Update throughout for bfd section macro and function changes. gas/ * as.c, * as.h, * dw2gencfi.c, * dwarf2dbg.c, * ecoff.c, * read.c, * stabs.c, * subsegs.c, * subsegs.h, * write.c, * config/obj-coff-seh.c, * config/obj-coff.c, * config/obj-ecoff.c, * config/obj-elf.c, * config/obj-macho.c, * config/obj-som.c, * config/tc-aarch64.c, * config/tc-alpha.c, * config/tc-arc.c, * config/tc-arm.c, * config/tc-avr.c, * config/tc-bfin.c, * config/tc-bpf.c, * config/tc-d10v.c, * config/tc-d30v.c, * config/tc-epiphany.c, * config/tc-fr30.c, * config/tc-frv.c, * config/tc-h8300.c, * config/tc-hppa.c, * config/tc-i386.c, * config/tc-ia64.c, * config/tc-ip2k.c, * config/tc-iq2000.c, * config/tc-lm32.c, * config/tc-m32c.c, * config/tc-m32r.c, * config/tc-m68hc11.c, * config/tc-mep.c, * config/tc-microblaze.c, * config/tc-mips.c, * config/tc-mmix.c, * config/tc-mn10200.c, * config/tc-mn10300.c, * config/tc-msp430.c, * config/tc-mt.c, * config/tc-nds32.c, * config/tc-or1k.c, * config/tc-ppc.c, * config/tc-pru.c, * config/tc-rl78.c, * config/tc-rx.c, * config/tc-s12z.c, * config/tc-s390.c, * config/tc-score.c, * config/tc-score7.c, * config/tc-sh.c, * config/tc-sparc.c, * config/tc-spu.c, * config/tc-tic4x.c, * config/tc-tic54x.c, * config/tc-tic6x.c, * config/tc-tilegx.c, * config/tc-tilepro.c, * config/tc-v850.c, * config/tc-visium.c, * config/tc-wasm32.c, * config/tc-xc16x.c, * config/tc-xgate.c, * config/tc-xstormy16.c, * config/tc-xtensa.c, * config/tc-z8k.c: Update throughout for bfd section macro and function changes. * write.c (compress_debug): Use bfd_rename_section. gdb/ * aarch64-linux-tdep.c, * arm-tdep.c, * auto-load.c, * coff-pe-read.c, * coffread.c, * corelow.c, * dbxread.c, * dicos-tdep.c, * dwarf2-frame.c, * dwarf2read.c, * elfread.c, * exec.c, * fbsd-tdep.c, * gcore.c, * gdb_bfd.c, * gdb_bfd.h, * hppa-tdep.c, * i386-cygwin-tdep.c, * i386-fbsd-tdep.c, * i386-linux-tdep.c, * jit.c, * linux-tdep.c, * machoread.c, * maint.c, * mdebugread.c, * minidebug.c, * mips-linux-tdep.c, * mips-sde-tdep.c, * mips-tdep.c, * mipsread.c, * nto-tdep.c, * objfiles.c, * objfiles.h, * osabi.c, * ppc-linux-tdep.c, * ppc64-tdep.c, * record-btrace.c, * record-full.c, * remote.c, * rs6000-aix-tdep.c, * rs6000-tdep.c, * s390-linux-tdep.c, * s390-tdep.c, * solib-aix.c, * solib-dsbt.c, * solib-frv.c, * solib-spu.c, * solib-svr4.c, * solib-target.c, * spu-linux-nat.c, * spu-tdep.c, * symfile-mem.c, * symfile.c, * symmisc.c, * symtab.c, * target.c, * windows-nat.c, * xcoffread.c, * cli/cli-dump.c, * compile/compile-object-load.c, * mi/mi-interp.c: Update throughout for bfd section macro and function changes. * gcore (gcore_create_callback): Use bfd_set_section_lma. * spu-tdep.c (spu_overlay_new_objfile): Likewise. gprof/ * corefile.c, * symtab.c: Update throughout for bfd section macro and function changes. ld/ * ldcref.c, * ldctor.c, * ldelf.c, * ldlang.c, * pe-dll.c, * emultempl/aarch64elf.em, * emultempl/aix.em, * emultempl/armcoff.em, * emultempl/armelf.em, * emultempl/cr16elf.em, * emultempl/cskyelf.em, * emultempl/m68hc1xelf.em, * emultempl/m68kelf.em, * emultempl/mipself.em, * emultempl/mmix-elfnmmo.em, * emultempl/mmo.em, * emultempl/msp430.em, * emultempl/nios2elf.em, * emultempl/pe.em, * emultempl/pep.em, * emultempl/ppc64elf.em, * emultempl/xtensaelf.em: Update throughout for bfd section macro and function changes. libctf/ * ctf-open-bfd.c: Update throughout for bfd section macro changes. opcodes/ * arc-ext.c: Update throughout for bfd section macro changes. sim/ * common/sim-load.c, * common/sim-utils.c, * cris/sim-if.c, * erc32/func.c, * lm32/sim-if.c, * m32c/load.c, * m32c/trace.c, * m68hc11/interp.c, * ppc/hw_htab.c, * ppc/hw_init.c, * rl78/load.c, * rl78/trace.c, * rx/gdb-if.c, * rx/load.c, * rx/trace.c: Update throughout for bfd section macro changes.
377 lines
11 KiB
C
377 lines
11 KiB
C
/* IBM S/390-specific support for ELF 32 and 64 bit functions
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Copyright (C) 2000-2019 Free Software Foundation, Inc.
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Contributed by Andreas Krebbel.
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This file is part of BFD, the Binary File Descriptor library.
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This program 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 of the License, or
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(at your option) any later version.
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This program 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 this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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/* Return TRUE if H is an IFUNC symbol. Simply checking for the
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symbol type might not be enough since it might get changed to
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STT_FUNC for pointer equality reasons. */
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static inline bfd_boolean
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s390_is_ifunc_symbol_p (struct elf_link_hash_entry *h)
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{
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struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
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return h->type == STT_GNU_IFUNC || eh->ifunc_resolver_address != 0;
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}
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/* Return true if .got.plt is supposed to be emitted after .got. */
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static inline bfd_boolean
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s390_gotplt_after_got_p (struct bfd_link_info *info)
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{
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struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
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if (!htab->elf.sgot || !htab->elf.sgotplt)
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return TRUE;
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if (htab->elf.sgot->output_section == htab->elf.sgotplt->output_section)
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{
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if (htab->elf.sgot->output_offset < htab->elf.sgotplt->output_offset)
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return TRUE;
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}
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else
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{
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if (htab->elf.sgot->output_section->vma
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<= htab->elf.sgotplt->output_section->vma)
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return TRUE;
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}
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return FALSE;
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}
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/* Return the value of the _GLOBAL_OFFSET_TABLE_ symbol. */
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static inline bfd_vma
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s390_got_pointer (struct bfd_link_info *info)
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{
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struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
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bfd_vma got_pointer;
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BFD_ASSERT (htab && htab->elf.hgot);
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got_pointer = (htab->elf.hgot->root.u.def.section->output_section->vma
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+ htab->elf.hgot->root.u.def.section->output_offset);
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/* Our ABI requires the GOT pointer to point at the very beginning
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of the global offset table. */
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BFD_ASSERT (got_pointer
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<= (htab->elf.sgot->output_section->vma
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+ htab->elf.sgot->output_offset));
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BFD_ASSERT (got_pointer
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<= (htab->elf.sgotplt->output_section->vma
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+ htab->elf.sgotplt->output_offset));
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return got_pointer;
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}
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/* Return the offset of the .got versus _GLOBAL_OFFSET_TABLE_. */
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static inline bfd_vma
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s390_got_offset (struct bfd_link_info *info)
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{
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struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
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/* The absolute address of the .got in the target image. */
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bfd_vma got_address = (htab->elf.sgot->output_section->vma
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+ htab->elf.sgot->output_offset);
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/* GOT offset must not be negative. */
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BFD_ASSERT (s390_got_pointer (info) <= got_address);
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return got_address - s390_got_pointer (info);
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}
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/* Return the offset of the .got.plt versus _GLOBAL_OFFSET_TABLE_. */
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static inline bfd_vma
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s390_gotplt_offset (struct bfd_link_info *info)
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{
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struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
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/* The absolute address of the .got.plt in the target image. */
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bfd_vma gotplt_address = (htab->elf.sgotplt->output_section->vma
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+ htab->elf.sgotplt->output_offset);
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/* GOT offset must not be negative. */
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BFD_ASSERT (s390_got_pointer (info) <= gotplt_address);
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return gotplt_address - s390_got_pointer (info);
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}
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/* Create sections needed by STT_GNU_IFUNC symbol. */
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static bfd_boolean
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s390_elf_create_ifunc_sections (bfd *abfd, struct bfd_link_info *info)
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{
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flagword flags;
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asection *s;
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const struct elf_backend_data *bed = get_elf_backend_data (abfd);
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struct elf_link_hash_table *htab = elf_hash_table (info);
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if (htab->iplt != NULL)
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return TRUE;
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flags = bed->dynamic_sec_flags;
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if (bfd_link_pic (info))
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{
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s = bfd_make_section_with_flags (abfd, ".rela.ifunc",
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flags | SEC_READONLY);
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if (s == NULL
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|| !bfd_set_section_alignment (s, bed->s->log_file_align))
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return FALSE;
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htab->irelifunc = s;
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}
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/* Create .iplt, .rel[a].iplt, and .igot.plt. */
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s = bfd_make_section_with_flags (abfd, ".iplt",
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flags | SEC_CODE | SEC_READONLY);
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if (s == NULL
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|| !bfd_set_section_alignment (s, bed->plt_alignment))
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return FALSE;
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htab->iplt = s;
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s = bfd_make_section_with_flags (abfd, ".rela.iplt", flags | SEC_READONLY);
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if (s == NULL
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|| !bfd_set_section_alignment (s, bed->s->log_file_align))
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return FALSE;
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htab->irelplt = s;
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s = bfd_make_section_with_flags (abfd, ".igot.plt", flags);
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if (s == NULL
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|| !bfd_set_section_alignment (s, bed->s->log_file_align))
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return FALSE;
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htab->igotplt = s;
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return TRUE;
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}
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/* Allocate space in .plt, .got and associated reloc sections for
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dynamic relocs against a STT_GNU_IFUNC symbol definition. */
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static bfd_boolean
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s390_elf_allocate_ifunc_dyn_relocs (struct bfd_link_info *info,
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struct elf_link_hash_entry *h)
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{
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struct elf_dyn_relocs *p;
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struct elf_link_hash_table *htab;
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struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
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struct elf_dyn_relocs **head = &eh->dyn_relocs;
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htab = elf_hash_table (info);
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eh->ifunc_resolver_address = h->root.u.def.value;
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eh->ifunc_resolver_section = h->root.u.def.section;
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/* Support garbage collection against STT_GNU_IFUNC symbols. */
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if (h->plt.refcount <= 0 && h->got.refcount <= 0)
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{
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/* When building shared library, we need to handle the case
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where it is marked with regular reference, but not non-GOT
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reference. It may happen if we didn't see STT_GNU_IFUNC
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symbol at the time when checking relocations. */
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if (bfd_link_pic (info)
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&& !h->non_got_ref
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&& h->ref_regular)
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for (p = *head; p != NULL; p = p->next)
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if (p->count)
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{
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h->non_got_ref = 1;
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goto keep;
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}
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h->got = htab->init_got_offset;
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h->plt = htab->init_plt_offset;
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*head = NULL;
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return TRUE;
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}
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/* Return and discard space for dynamic relocations against it if
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it is never referenced in a non-shared object. */
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if (!h->ref_regular)
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{
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if (h->plt.refcount > 0
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|| h->got.refcount > 0)
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abort ();
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h->got = htab->init_got_offset;
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h->plt = htab->init_plt_offset;
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*head = NULL;
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return TRUE;
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}
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keep:
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/* Without checking h->plt.refcount here we allocate a PLT slot.
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When setting plt.refcount in check_relocs it might not have been
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known that this will be an IFUNC symol. */
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h->plt.offset = htab->iplt->size;
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h->needs_plt = 1;
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htab->iplt->size += PLT_ENTRY_SIZE;
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htab->igotplt->size += GOT_ENTRY_SIZE;
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htab->irelplt->size += RELA_ENTRY_SIZE;
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htab->irelplt->reloc_count++;
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/* In order to make pointer equality work with IFUNC symbols defined
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in a non-PIE executable and referenced in a shared lib, we turn
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the symbol into a STT_FUNC symbol and make the symbol value to
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point to the IPLT slot. That way the referencing shared lib will
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always get the PLT slot address when resolving the respective
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R_390_GLOB_DAT/R_390_64 relocs on that symbol. */
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if (bfd_link_pde (info)
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&& h->def_regular
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&& h->ref_dynamic)
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{
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h->root.u.def.section = htab->iplt;
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h->root.u.def.value = h->plt.offset;
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h->size = PLT_ENTRY_SIZE;
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h->type = STT_FUNC;
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}
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if (!bfd_link_pic (info))
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*head = NULL;
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/* Finally, allocate space. */
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p = *head;
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if (p != NULL)
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{
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bfd_size_type count = 0;
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do
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{
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count += p->count;
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p = p->next;
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}
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while (p != NULL);
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htab->irelifunc->size += count * RELA_ENTRY_SIZE;
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}
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/* Decide whether the got.iplt slot can be used. This has to be
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avoided if the values in the GOT slots could differ for pointer
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equality reasons. */
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if (h->got.refcount <= 0
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|| (bfd_link_pic (info)
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&& (h->dynindx == -1 || h->forced_local))
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|| bfd_link_pie (info)
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|| htab->sgot == NULL)
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{
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/* Use .got.iplt. */
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h->got.offset = (bfd_vma) -1;
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}
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else
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{
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h->got.offset = htab->sgot->size;
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htab->sgot->size += GOT_ENTRY_SIZE;
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if (bfd_link_pic (info))
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htab->srelgot->size += RELA_ENTRY_SIZE;
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}
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return TRUE;
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}
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static bfd_boolean
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elf_s390_allocate_local_syminfo (bfd *abfd, Elf_Internal_Shdr *symtab_hdr)
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{
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bfd_size_type size;
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size = symtab_hdr->sh_info;
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size *= (sizeof (bfd_signed_vma) /* local got */
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+ sizeof (struct plt_entry) /* local plt */
|
|
+ sizeof(char)); /* local tls type */
|
|
elf_local_got_refcounts (abfd) = ((bfd_signed_vma *)
|
|
bfd_zalloc (abfd, size));
|
|
if (elf_local_got_refcounts (abfd) == NULL)
|
|
return FALSE;
|
|
elf_s390_local_plt (abfd)
|
|
= (struct plt_entry*)(elf_local_got_refcounts (abfd)
|
|
+ symtab_hdr->sh_info);
|
|
elf_s390_local_got_tls_type (abfd)
|
|
= (char *) (elf_s390_local_plt (abfd) + symtab_hdr->sh_info);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Whether to sort relocs output by ld -r or ld --emit-relocs, by
|
|
r_offset. Don't do so for code sections. We want to keep ordering
|
|
of GDCALL / PLT32DBL for TLS optimizations as is. On the other
|
|
hand, elf-eh-frame.c processing requires .eh_frame relocs to be
|
|
sorted. */
|
|
|
|
static bfd_boolean
|
|
elf_s390_elf_sort_relocs_p (asection *sec)
|
|
{
|
|
return (sec->flags & SEC_CODE) == 0;
|
|
}
|
|
|
|
/* Merge object attributes from IBFD into OBFD. Raise an error if
|
|
there are conflicting attributes. */
|
|
static bfd_boolean
|
|
elf_s390_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info)
|
|
{
|
|
bfd *obfd = info->output_bfd;
|
|
obj_attribute *in_attr, *in_attrs;
|
|
obj_attribute *out_attr, *out_attrs;
|
|
|
|
if (!elf_known_obj_attributes_proc (obfd)[0].i)
|
|
{
|
|
/* This is the first object. Copy the attributes. */
|
|
_bfd_elf_copy_obj_attributes (ibfd, obfd);
|
|
|
|
/* Use the Tag_null value to indicate the attributes have been
|
|
initialized. */
|
|
elf_known_obj_attributes_proc (obfd)[0].i = 1;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
|
|
out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
|
|
|
|
/* Check for conflicting Tag_GNU_S390_ABI_Vector attributes and
|
|
merge non-conflicting ones. */
|
|
in_attr = &in_attrs[Tag_GNU_S390_ABI_Vector];
|
|
out_attr = &out_attrs[Tag_GNU_S390_ABI_Vector];
|
|
|
|
if (in_attr->i > 2)
|
|
_bfd_error_handler
|
|
/* xgettext:c-format */
|
|
(_("warning: %pB uses unknown vector ABI %d"), ibfd,
|
|
in_attr->i);
|
|
else if (out_attr->i > 2)
|
|
_bfd_error_handler
|
|
/* xgettext:c-format */
|
|
(_("warning: %pB uses unknown vector ABI %d"), obfd,
|
|
out_attr->i);
|
|
else if (in_attr->i != out_attr->i)
|
|
{
|
|
out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
|
|
|
|
if (in_attr->i && out_attr->i)
|
|
{
|
|
const char abi_str[3][9] = { "none", "software", "hardware" };
|
|
|
|
_bfd_error_handler
|
|
/* xgettext:c-format */
|
|
(_("warning: %pB uses vector %s ABI, %pB uses %s ABI"),
|
|
ibfd, abi_str[in_attr->i], obfd, abi_str[out_attr->i]);
|
|
}
|
|
if (in_attr->i > out_attr->i)
|
|
out_attr->i = in_attr->i;
|
|
}
|
|
|
|
/* Merge Tag_compatibility attributes and any common GNU ones. */
|
|
_bfd_elf_merge_object_attributes (ibfd, info);
|
|
|
|
return TRUE;
|
|
}
|