Browse Source
(ALL_MACHINES_CFILES): Add cpu-cris.c. (BFD32_BACKENDS): Add aout-cris.lo and elf32-cris.lo. (BFD32_BACKENDS_CFILES): Add aout-cris.c and elf32-cris.c. (cpu-cris.lo, aout-cris.lo, elf32-cris.lo): New rules. * Makefile.in: Rebuild. * aclocal.m4: Rebuild. * aoutx.h (NAME(aout,machine_type)): Add case for bfd_arch_cris. * archures.c (enum bfd_architecture): Add bfd_arch_cris. (bfd_cris_arch): Declare. (bfd_archures_list): Add bfd_cris_arch. * bfd-in2.h: Rebuild. * config.bfd: (cris-*-*): New target. * configure.in (bfd_elf32_cris_vec, cris_aout_vec): New vectors. * configure: Rebuild. * elf.c (prep_headers): Add bfd_arch_cris. * libbfd.h: Rebuild. * libaout.h (enum machine_type): Add M_CRIS. * reloc.c: Add CRIS relocations. * targets.c (bfd_target bfd_elf32_cris_vec, cris_aout_vec): Declare. (bfd_target_vect): Add bfd_elf32_cris_vec and cris_aout_vec. * cpu-cris.c, aout-cris.c, elf32-cris.c: New files. * po/POTFILES.in, po/bfd.pot: Regenerate.binutils-2_11-branch
Hans-Peter Nilsson
26 years ago
20 changed files with 1524 additions and 426 deletions
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/* BFD backend for CRIS a.out binaries.
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Copyright (C) 2000 Free Software Foundation, Inc. |
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Contributed by Axis Communications AB. |
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Written by Hans-Peter Nilsson. |
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|
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This file is part of BFD, the Binary File Descriptor library. |
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|
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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 2 of the License, or |
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(at your option) any later version. |
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|
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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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|
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
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/* See info in the file PORTING for documentation of these macros and
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functions. Beware; some of the information there is outdated. */ |
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#define N_HEADER_IN_TEXT(x) 0 |
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#define BYTES_IN_WORD 4 |
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#define N_TXTOFF(x) 32 |
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#define ENTRY_CAN_BE_ZERO |
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#define TEXT_START_ADDR 0 |
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/* If you change this to 4, you can not link to an address N*4+2. */ |
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#define SEGMENT_SIZE 2 |
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/* For some reason, if the a.out file has Z_MAGIC, then
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adata(abfd).exec_bytes_size is not used, but rather |
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adata(abfd).zmagic_disk_block_size, even though the exec_header is |
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*not* included in the text segment. A simple workaround is to |
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#define ZMAGIC_DISK_BLOCK_SIZE, which is used if defined; otherwise |
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TARGET_PAGE_SIZE is used. */ |
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#define ZMAGIC_DISK_BLOCK_SIZE N_TXTOFF (0) |
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/* It seems odd at first to set a page-size this low, but gives greater
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freedom in where things can be linked. The drawback is that you have |
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to set alignment and padding in linker scripts. */ |
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#define TARGET_PAGE_SIZE SEGMENT_SIZE |
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#define TARGETNAME "a.out-cris" |
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/* N_SHARED_LIB gets this reasonable default as of 1999-07-12, but we
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have to work with 2.9.1. Note that N_SHARED_LIB is used in a |
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SUN-specific context, not applicable to CRIS. */ |
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#define N_SHARED_LIB(x) 0 |
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/* The definition here seems not used; just provided as a convention. */ |
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#define DEFAULT_ARCH bfd_arch_cris |
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/* ??? Spacing might be essential for the parameters in this macro.
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Do Not Change. */ |
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#define MY(OP) CAT (cris_aout_,OP) |
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#define NAME(x,y) CAT3(cris_aout,_32_,y) |
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#include "bfd.h" |
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/* Version 1 of the header. */ |
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#define MY_exec_hdr_flags 1 |
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#define MY_write_object_contents MY(write_object_contents) |
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static boolean MY(write_object_contents) PARAMS ((bfd *)); |
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/* Forward this, so we can use a pointer to it in PARAMS. */ |
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struct reloc_ext_external; |
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#define MY_swap_ext_reloc_out MY(swap_ext_reloc_out) |
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static void MY(swap_ext_reloc_out) PARAMS ((bfd *, arelent *, |
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struct reloc_ext_external *)); |
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#define MY_swap_ext_reloc_in MY(swap_ext_reloc_in) |
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static void MY(swap_ext_reloc_in) PARAMS ((bfd *, struct |
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reloc_ext_external *, |
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arelent *, asymbol **, |
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bfd_size_type)); |
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#define MY_set_sizes MY(set_sizes) |
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static boolean MY(set_sizes) PARAMS ((bfd *)); |
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/* To set back reloc_size to ext, we make MY(set_sizes) be called
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through this construct. Note that MY_set_arch_mach is only called |
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through SET_ARCH_MACH. The default bfd_default_set_arch_mach will |
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not call set_sizes. */ |
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|
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#define MY_set_arch_mach NAME (aout, set_arch_mach) |
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#define SET_ARCH_MACH(BFD, EXEC) \ |
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MY_set_arch_mach (BFD, DEFAULT_ARCH, N_MACHTYPE (EXEC)) |
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/* These macros describe the binary layout of the reloc information we
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use in a file. */ |
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#define RELOC_EXT_BITS_EXTERN_LITTLE 0x80 |
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#define RELOC_EXT_BITS_TYPE_LITTLE 3 |
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#define RELOC_EXT_BITS_TYPE_SH_LITTLE 0 |
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#ifndef MY_get_section_contents |
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#define MY_get_section_contents aout_32_get_section_contents |
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#endif |
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/* Include generic functions (some are overridden above). */ |
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#include "aout32.c" |
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#include "aout-target.h" |
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/* We need our own version to set header flags. */ |
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static boolean |
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MY(write_object_contents) (abfd) |
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bfd *abfd; |
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{ |
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struct external_exec exec_bytes; |
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struct internal_exec *execp = exec_hdr (abfd); |
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/* We set the reloc type to RELOC_EXT_SIZE, although setting it at all
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seems unnecessary when inspecting as and ld behavior (not an |
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exhaustive inspection). The default write_object_contents |
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definition sets RELOC_EXT_SIZE, so we follow suite and set it too. */ |
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obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE; |
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/* Setting N_SET_MACHTYPE and using N_SET_FLAGS is not performed by
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the default definition. */ |
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if (bfd_get_arch(abfd) == bfd_arch_cris) |
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N_SET_MACHTYPE(*execp, M_CRIS); |
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N_SET_FLAGS (*execp, aout_backend_info (abfd)->exec_hdr_flags); |
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WRITE_HEADERS (abfd, execp); |
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return true; |
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} |
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/* We need our own for these reasons:
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- Assert that a normal 8, 16 or 32 reloc is output. |
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- Fix what seems to be a weak-bug (perhaps there for valid reasons). */ |
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static void |
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MY(swap_ext_reloc_out) (abfd, g, natptr) |
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bfd *abfd; |
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arelent *g; |
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struct reloc_ext_external *natptr; |
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{ |
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int r_index; |
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int r_extern; |
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unsigned int r_type; |
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unsigned int r_addend; |
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asymbol *sym = *(g->sym_ptr_ptr); |
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asection *output_section = sym->section->output_section; |
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PUT_WORD (abfd, g->address, natptr->r_address); |
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r_type = (unsigned int) g->howto->type; |
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r_addend = g->addend; |
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if ((sym->flags & BSF_SECTION_SYM) != 0) |
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r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma; |
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/* If this relocation is relative to a symbol then set the
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r_index to the symbols index, and the r_extern bit. |
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Absolute symbols can come in in two ways, either as an offset |
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from the abs section, or as a symbol which has an abs value. |
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check for that here. */ |
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if (bfd_is_abs_section (bfd_get_section (sym))) |
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{ |
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r_extern = 0; |
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r_index = N_ABS; |
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} |
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else if ((sym->flags & BSF_SECTION_SYM) == 0) |
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{ |
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if (bfd_is_und_section (bfd_get_section (sym)) |
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/* Remember to check for weak symbols; they count as global. */ |
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|| (sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0) |
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r_extern = 1; |
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else |
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r_extern = 0; |
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r_index = (*(g->sym_ptr_ptr))->KEEPIT; |
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} |
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else |
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{ |
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/* Just an ordinary section. */ |
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r_extern = 0; |
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r_index = output_section->target_index; |
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} |
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/* The relocation type is the same as the canonical ones, but only
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the first 3 are used: RELOC_8, RELOC_16, RELOC_32. |
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We may change this later, but assert this for the moment. */ |
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if (r_type > 2) |
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{ |
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(*_bfd_error_handler) (_("%s: Invalid relocation type exported: %d"), |
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bfd_get_filename (abfd), r_type); |
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bfd_set_error (bfd_error_wrong_format); |
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} |
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/* Now the fun stuff. */ |
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natptr->r_index[2] = r_index >> 16; |
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natptr->r_index[1] = r_index >> 8; |
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natptr->r_index[0] = r_index; |
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natptr->r_type[0] = |
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(r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0) |
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| (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE); |
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PUT_WORD (abfd, r_addend, natptr->r_addend); |
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} |
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/* We need our own to assert that a normal 8, 16 or 32 reloc is input. */ |
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static void |
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MY(swap_ext_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount) |
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bfd *abfd; |
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struct reloc_ext_external *bytes; |
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arelent *cache_ptr; |
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asymbol **symbols; |
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bfd_size_type symcount; |
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{ |
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unsigned int r_index; |
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int r_extern; |
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unsigned int r_type; |
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struct aoutdata *su = &(abfd->tdata.aout_data->a); |
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cache_ptr->address = (GET_SWORD (abfd, bytes->r_address)); |
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/* Now the fun stuff. */ |
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r_index = (bytes->r_index[2] << 16) |
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| (bytes->r_index[1] << 8) |
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| bytes->r_index[0]; |
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r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE)); |
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r_type = ((bytes->r_type[0]) >> RELOC_EXT_BITS_TYPE_SH_LITTLE) |
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& RELOC_EXT_BITS_TYPE_LITTLE; |
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if (r_type > 2) |
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{ |
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(*_bfd_error_handler) (_("%s: Invalid relocation type imported: %d"), |
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bfd_get_filename (abfd), r_type); |
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bfd_set_error(bfd_error_wrong_format); |
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} |
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cache_ptr->howto = howto_table_ext + r_type; |
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if (r_extern && r_index > symcount) |
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{ |
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(*_bfd_error_handler) |
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(_("%s: Bad relocation record imported: %d"), |
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bfd_get_filename (abfd), r_index); |
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bfd_set_error (bfd_error_wrong_format); |
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/* We continue, so we can catch further errors. */ |
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r_extern = 0; |
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r_index = N_ABS; |
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} |
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/* Magically uses r_extern, symbols etc. Ugly, but it's what's in the
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default. */ |
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MOVE_ADDRESS (GET_SWORD (abfd, bytes->r_addend)); |
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} |
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/* We use the same as the default, except that we also set
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"obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;", to avoid changing |
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NAME (aout, set_arch_mach) in aoutx. */ |
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static boolean |
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MY(set_sizes) (abfd) |
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bfd *abfd; |
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{ |
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/* Just as the default in aout-target.h (with some #ifdefs folded)... */ |
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adata(abfd).page_size = TARGET_PAGE_SIZE; |
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adata(abfd).segment_size = SEGMENT_SIZE; |
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adata(abfd).zmagic_disk_block_size = ZMAGIC_DISK_BLOCK_SIZE; |
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adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE; |
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/* ... except for that we have the extended reloc. The alternative
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would be to add a check on bfd_arch_cris in NAME (aout, |
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set_arch_mach) in aoutx.h, but I don't want to do that since |
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target-specific things should not be added there. */ |
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obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE; |
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return true; |
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} |
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/*
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* Local variables: |
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* eval: (c-set-style "gnu") |
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* indent-tabs-mode: t |
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* End: |
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*/ |
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File diff suppressed because it is too large
@ -0,0 +1,57 @@ |
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/* BFD support for the Axis CRIS architecture.
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Copyright (C) 2000 Free Software Foundation, Inc. |
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Contributed by Axis Communications AB. |
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Written by Hans-Peter Nilsson. |
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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 2 of the License, or |
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(at your option) any later version. |
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|
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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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|
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
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#include "bfd.h" |
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#include "sysdep.h" |
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#include "libbfd.h" |
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const bfd_arch_info_type |
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bfd_cris_arch = |
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{ |
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32, /* There's 32 bits_per_word. */ |
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32, /* There's 32 bits_per_address. */ |
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8, /* There's 8 bits_per_byte. */ |
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bfd_arch_cris, /* One of enum bfd_architecture, defined
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in archures.c and provided in |
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generated header files. */ |
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0xff, /* Only 1 machine, but #255 for
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historical reasons. */ |
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"cris", /* The arch_name. */ |
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"cris", /* The printable name is the same. */ |
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1, /* Section alignment power; each section
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is aligned to (only) 2^1 bytes. */ |
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true, /* This is the default "machine", since
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there's only one. */ |
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bfd_default_compatible, /* A default function for testing
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"machine" compatibility of two |
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bfd_arch_info_type. */ |
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bfd_default_scan, /* Check if an bfd_arch_info_type is a
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match. */ |
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NULL /* Pointer to next bfd_arch_info_type in
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the same family. */ |
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}; |
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/*
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* Local variables: |
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* eval: (c-set-style "gnu") |
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* indent-tabs-mode: t |
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* End: |
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*/ |
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@ -0,0 +1,601 @@ |
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/* CRIS-specific support for 32-bit ELF.
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Copyright (C) 2000 Free Software Foundation, Inc. |
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Contributed by Axis Communications AB. |
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Written by Hans-Peter Nilsson, based on elf32-fr30.c |
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|
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This file is part of BFD, the Binary File Descriptor library. |
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|
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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 2 of the License, or |
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(at your option) any later version. |
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|
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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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|
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
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#include "bfd.h" |
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#include "sysdep.h" |
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#include "libbfd.h" |
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#include "elf-bfd.h" |
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#include "elf/cris.h" |
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/* Forward declarations. */ |
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static reloc_howto_type * cris_reloc_type_lookup |
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PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); |
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static void cris_info_to_howto_rela |
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PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *)); |
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static boolean cris_elf_relocate_section |
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PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
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Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); |
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static bfd_reloc_status_type cris_final_link_relocate |
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PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *, |
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Elf_Internal_Rela *, bfd_vma)); |
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static boolean cris_elf_gc_sweep_hook |
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PARAMS ((bfd *, struct bfd_link_info *, asection *, |
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const Elf_Internal_Rela *)); |
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static asection * cris_elf_gc_mark_hook |
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PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *, |
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struct elf_link_hash_entry *, Elf_Internal_Sym *)); |
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static reloc_howto_type cris_elf_howto_table [] = |
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{ |
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/* This reloc does nothing. */ |
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HOWTO (R_CRIS_NONE, /* type */ |
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0, /* rightshift */ |
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2, /* size (0 = byte, 1 = short, 2 = long) */ |
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32, /* bitsize */ |
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false, /* pc_relative */ |
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0, /* bitpos */ |
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complain_overflow_bitfield, /* complain_on_overflow */ |
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bfd_elf_generic_reloc, /* special_function */ |
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"R_CRIS_NONE", /* name */ |
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false, /* partial_inplace */ |
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0, /* src_mask */ |
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0, /* dst_mask */ |
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false), /* pcrel_offset */ |
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|
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/* An 8 bit absolute relocation. */ |
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HOWTO (R_CRIS_8, /* type */ |
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0, /* rightshift */ |
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0, /* size (0 = byte, 1 = short, 2 = long) */ |
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8, /* bitsize */ |
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false, /* pc_relative */ |
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0, /* bitpos */ |
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complain_overflow_bitfield, /* complain_on_overflow */ |
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bfd_elf_generic_reloc, /* special_function */ |
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"R_CRIS_8", /* name */ |
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false, /* partial_inplace */ |
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0x0000, /* src_mask */ |
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0x00ff, /* dst_mask */ |
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false), /* pcrel_offset */ |
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|
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/* A 16 bit absolute relocation. */ |
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HOWTO (R_CRIS_16, /* type */ |
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0, /* rightshift */ |
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1, /* size (0 = byte, 1 = short, 2 = long) */ |
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16, /* bitsize */ |
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false, /* pc_relative */ |
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0, /* bitpos */ |
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complain_overflow_bitfield, /* complain_on_overflow */ |
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bfd_elf_generic_reloc, /* special_function */ |
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"R_CRIS_16", /* name */ |
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false, /* partial_inplace */ |
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0x00000000, /* src_mask */ |
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0x0000ffff, /* dst_mask */ |
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false), /* pcrel_offset */ |
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|
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/* A 32 bit absolute relocation. */ |
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HOWTO (R_CRIS_32, /* type */ |
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0, /* rightshift */ |
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2, /* size (0 = byte, 1 = short, 2 = long) */ |
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32, /* bitsize */ |
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false, /* pc_relative */ |
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0, /* bitpos */ |
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complain_overflow_bitfield, /* complain_on_overflow */ |
|||
bfd_elf_generic_reloc, /* special_function */ |
|||
"R_CRIS_32", /* name */ |
|||
false, /* partial_inplace */ |
|||
0x00000000, /* src_mask */ |
|||
0xffffffff, /* dst_mask */ |
|||
false), /* pcrel_offset */ |
|||
|
|||
/* An 8 bit absolute relocation. */ |
|||
HOWTO (R_CRIS_8_PCREL, /* type */ |
|||
0, /* rightshift */ |
|||
0, /* size (0 = byte, 1 = short, 2 = long) */ |
|||
8, /* bitsize */ |
|||
true, /* pc_relative */ |
|||
0, /* bitpos */ |
|||
complain_overflow_bitfield, /* complain_on_overflow */ |
|||
bfd_elf_generic_reloc, /* special_function */ |
|||
"R_CRIS_8_PCREL", /* name */ |
|||
false, /* partial_inplace */ |
|||
0x0000, /* src_mask */ |
|||
0x00ff, /* dst_mask */ |
|||
false), /* pcrel_offset */ |
|||
|
|||
/* A 16 bit absolute relocation. */ |
|||
HOWTO (R_CRIS_16_PCREL, /* type */ |
|||
0, /* rightshift */ |
|||
1, /* size (0 = byte, 1 = short, 2 = long) */ |
|||
16, /* bitsize */ |
|||
true, /* pc_relative */ |
|||
0, /* bitpos */ |
|||
complain_overflow_bitfield, /* complain_on_overflow */ |
|||
bfd_elf_generic_reloc, /* special_function */ |
|||
"R_CRIS_16", /* name */ |
|||
false, /* partial_inplace */ |
|||
0x00000000, /* src_mask */ |
|||
0x0000ffff, /* dst_mask */ |
|||
false), /* pcrel_offset */ |
|||
|
|||
/* A 32 bit absolute relocation. */ |
|||
HOWTO (R_CRIS_32_PCREL, /* type */ |
|||
0, /* rightshift */ |
|||
2, /* size (0 = byte, 1 = short, 2 = long) */ |
|||
32, /* bitsize */ |
|||
true, /* pc_relative */ |
|||
0, /* bitpos */ |
|||
complain_overflow_bitfield, /* complain_on_overflow */ |
|||
bfd_elf_generic_reloc, /* special_function */ |
|||
"R_CRIS_32", /* name */ |
|||
false, /* partial_inplace */ |
|||
0x00000000, /* src_mask */ |
|||
0xffffffff, /* dst_mask */ |
|||
false), /* pcrel_offset */ |
|||
|
|||
/* GNU extension to record C++ vtable hierarchy */ |
|||
HOWTO (R_CRIS_GNU_VTINHERIT, /* type */ |
|||
0, /* rightshift */ |
|||
2, /* size (0 = byte, 1 = short, 2 = long) */ |
|||
0, /* bitsize */ |
|||
false, /* pc_relative */ |
|||
0, /* bitpos */ |
|||
complain_overflow_dont, /* complain_on_overflow */ |
|||
NULL, /* special_function */ |
|||
"R_CRIS_GNU_VTINHERIT", /* name */ |
|||
false, /* partial_inplace */ |
|||
0, /* src_mask */ |
|||
0, /* dst_mask */ |
|||
false), /* pcrel_offset */ |
|||
|
|||
/* GNU extension to record C++ vtable member usage */ |
|||
HOWTO (R_CRIS_GNU_VTENTRY, /* type */ |
|||
0, /* rightshift */ |
|||
2, /* size (0 = byte, 1 = short, 2 = long) */ |
|||
0, /* bitsize */ |
|||
false, /* pc_relative */ |
|||
0, /* bitpos */ |
|||
complain_overflow_dont, /* complain_on_overflow */ |
|||
_bfd_elf_rel_vtable_reloc_fn, /* special_function */ |
|||
"R_CRIS_GNU_VTENTRY", /* name */ |
|||
false, /* partial_inplace */ |
|||
0, /* src_mask */ |
|||
0, /* dst_mask */ |
|||
false) /* pcrel_offset */ |
|||
}; |
|||
|
|||
/* Map BFD reloc types to CRIS ELF reloc types. */ |
|||
|
|||
struct cris_reloc_map |
|||
{ |
|||
bfd_reloc_code_real_type bfd_reloc_val; |
|||
unsigned int cris_reloc_val; |
|||
}; |
|||
|
|||
static const struct cris_reloc_map cris_reloc_map [] = |
|||
{ |
|||
{ BFD_RELOC_NONE, R_CRIS_NONE }, |
|||
{ BFD_RELOC_8, R_CRIS_8 }, |
|||
{ BFD_RELOC_16, R_CRIS_16 }, |
|||
{ BFD_RELOC_32, R_CRIS_32 }, |
|||
{ BFD_RELOC_8_PCREL, R_CRIS_8_PCREL }, |
|||
{ BFD_RELOC_16_PCREL, R_CRIS_16_PCREL }, |
|||
{ BFD_RELOC_32_PCREL, R_CRIS_32_PCREL }, |
|||
{ BFD_RELOC_VTABLE_INHERIT, R_CRIS_GNU_VTINHERIT }, |
|||
{ BFD_RELOC_VTABLE_ENTRY, R_CRIS_GNU_VTENTRY } |
|||
}; |
|||
|
|||
static reloc_howto_type * |
|||
cris_reloc_type_lookup (abfd, code) |
|||
bfd * abfd ATTRIBUTE_UNUSED; |
|||
bfd_reloc_code_real_type code; |
|||
{ |
|||
unsigned int i; |
|||
|
|||
for (i = sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]); |
|||
--i;) |
|||
if (cris_reloc_map [i].bfd_reloc_val == code) |
|||
return & cris_elf_howto_table [cris_reloc_map[i].cris_reloc_val]; |
|||
|
|||
return NULL; |
|||
} |
|||
|
|||
/* Set the howto pointer for an CRIS ELF reloc. */ |
|||
|
|||
static void |
|||
cris_info_to_howto_rela (abfd, cache_ptr, dst) |
|||
bfd * abfd ATTRIBUTE_UNUSED; |
|||
arelent * cache_ptr; |
|||
Elf32_Internal_Rela * dst; |
|||
{ |
|||
unsigned int r_type; |
|||
|
|||
r_type = ELF32_R_TYPE (dst->r_info); |
|||
BFD_ASSERT (r_type < (unsigned int) R_CRIS_max); |
|||
cache_ptr->howto = & cris_elf_howto_table [r_type]; |
|||
} |
|||
|
|||
/* Perform a single relocation. By default we use the standard BFD
|
|||
routines, but we might have to do a few relocs ourselves in the future. */ |
|||
|
|||
static bfd_reloc_status_type |
|||
cris_final_link_relocate (howto, input_bfd, input_section, contents, rel, |
|||
relocation) |
|||
reloc_howto_type * howto; |
|||
bfd * input_bfd; |
|||
asection * input_section; |
|||
bfd_byte * contents; |
|||
Elf_Internal_Rela * rel; |
|||
bfd_vma relocation; |
|||
{ |
|||
bfd_reloc_status_type r |
|||
= _bfd_final_link_relocate (howto, input_bfd, input_section, |
|||
contents, rel->r_offset, |
|||
relocation, rel->r_addend); |
|||
return r; |
|||
} |
|||
|
|||
/* Relocate an CRIS ELF section. See elf32-fr30.c, from where this was
|
|||
copied, for further comments. */ |
|||
|
|||
static boolean |
|||
cris_elf_relocate_section (output_bfd, info, input_bfd, input_section, |
|||
contents, relocs, local_syms, local_sections) |
|||
bfd * output_bfd ATTRIBUTE_UNUSED; |
|||
struct bfd_link_info * info; |
|||
bfd * input_bfd; |
|||
asection * input_section; |
|||
bfd_byte * contents; |
|||
Elf_Internal_Rela * relocs; |
|||
Elf_Internal_Sym * local_syms; |
|||
asection ** local_sections; |
|||
{ |
|||
Elf_Internal_Shdr * symtab_hdr; |
|||
struct elf_link_hash_entry ** sym_hashes; |
|||
Elf_Internal_Rela * rel; |
|||
Elf_Internal_Rela * relend; |
|||
|
|||
symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
|||
sym_hashes = elf_sym_hashes (input_bfd); |
|||
relend = relocs + input_section->reloc_count; |
|||
|
|||
/* It seems this can happen with erroneous or unsupported input (mixing
|
|||
a.out and elf in an archive, for example.) */ |
|||
if (sym_hashes == NULL) |
|||
return false; |
|||
|
|||
for (rel = relocs; rel < relend; rel ++) |
|||
{ |
|||
reloc_howto_type * howto; |
|||
unsigned long r_symndx; |
|||
Elf_Internal_Sym * sym; |
|||
asection * sec; |
|||
struct elf_link_hash_entry * h; |
|||
bfd_vma relocation; |
|||
bfd_reloc_status_type r; |
|||
const char * name = NULL; |
|||
int r_type; |
|||
|
|||
r_type = ELF32_R_TYPE (rel->r_info); |
|||
|
|||
if ( r_type == R_CRIS_GNU_VTINHERIT |
|||
|| r_type == R_CRIS_GNU_VTENTRY) |
|||
continue; |
|||
|
|||
r_symndx = ELF32_R_SYM (rel->r_info); |
|||
|
|||
if (info->relocateable) |
|||
{ |
|||
/* This is a relocateable link. We don't have to change
|
|||
anything, unless the reloc is against a section symbol, |
|||
in which case we have to adjust according to where the |
|||
section symbol winds up in the output section. */ |
|||
if (r_symndx < symtab_hdr->sh_info) |
|||
{ |
|||
sym = local_syms + r_symndx; |
|||
|
|||
if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
|||
{ |
|||
sec = local_sections [r_symndx]; |
|||
rel->r_addend += sec->output_offset + sym->st_value; |
|||
} |
|||
} |
|||
|
|||
continue; |
|||
} |
|||
|
|||
/* This is a final link. */ |
|||
howto = cris_elf_howto_table + ELF32_R_TYPE (rel->r_info); |
|||
h = NULL; |
|||
sym = NULL; |
|||
sec = NULL; |
|||
|
|||
if (r_symndx < symtab_hdr->sh_info) |
|||
{ |
|||
sym = local_syms + r_symndx; |
|||
sec = local_sections [r_symndx]; |
|||
relocation = (sec->output_section->vma |
|||
+ sec->output_offset |
|||
+ sym->st_value); |
|||
|
|||
name = bfd_elf_string_from_elf_section |
|||
(input_bfd, symtab_hdr->sh_link, sym->st_name); |
|||
name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; |
|||
#if 0 |
|||
fprintf (stderr, "local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n", |
|||
sec->name, name, sym->st_name, |
|||
sec->output_section->vma, sec->output_offset, |
|||
sym->st_value, rel->r_addend); |
|||
#endif |
|||
} |
|||
else |
|||
{ |
|||
h = sym_hashes [r_symndx - symtab_hdr->sh_info]; |
|||
|
|||
while (h->root.type == bfd_link_hash_indirect |
|||
|| h->root.type == bfd_link_hash_warning) |
|||
h = (struct elf_link_hash_entry *) h->root.u.i.link; |
|||
|
|||
name = h->root.root.string; |
|||
|
|||
if (h->root.type == bfd_link_hash_defined |
|||
|| h->root.type == bfd_link_hash_defweak) |
|||
{ |
|||
sec = h->root.u.def.section; |
|||
relocation = (h->root.u.def.value |
|||
+ sec->output_section->vma |
|||
+ sec->output_offset); |
|||
#if 0 |
|||
fprintf (stderr, |
|||
"defined: sec: %s, name: %s, value: %x + %x + %x gives: %x\n", |
|||
sec->name, name, h->root.u.def.value, |
|||
sec->output_section->vma, sec->output_offset, relocation); |
|||
#endif |
|||
} |
|||
else if (h->root.type == bfd_link_hash_undefweak) |
|||
{ |
|||
#if 0 |
|||
fprintf (stderr, "undefined: sec: %s, name: %s\n", |
|||
sec->name, name); |
|||
#endif |
|||
relocation = 0; |
|||
} |
|||
else if (info->shared |
|||
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) |
|||
relocation = 0; |
|||
else |
|||
{ |
|||
if (! ((*info->callbacks->undefined_symbol) |
|||
(info, h->root.root.string, input_bfd, |
|||
input_section, rel->r_offset, true))) |
|||
return false; |
|||
#if 0 |
|||
fprintf (stderr, "unknown: name: %s\n", name); |
|||
#endif |
|||
relocation = 0; |
|||
} |
|||
} |
|||
|
|||
r = cris_final_link_relocate (howto, input_bfd, input_section, |
|||
contents, rel, relocation); |
|||
|
|||
if (r != bfd_reloc_ok) |
|||
{ |
|||
const char * msg = (const char *) NULL; |
|||
|
|||
switch (r) |
|||
{ |
|||
case bfd_reloc_overflow: |
|||
r = info->callbacks->reloc_overflow |
|||
(info, name, howto->name, (bfd_vma) 0, |
|||
input_bfd, input_section, rel->r_offset); |
|||
break; |
|||
|
|||
case bfd_reloc_undefined: |
|||
r = info->callbacks->undefined_symbol |
|||
(info, name, input_bfd, input_section, rel->r_offset, |
|||
true); |
|||
break; |
|||
|
|||
case bfd_reloc_outofrange: |
|||
msg = _("internal error: out of range error"); |
|||
break; |
|||
|
|||
case bfd_reloc_notsupported: |
|||
msg = _("internal error: unsupported relocation error"); |
|||
break; |
|||
|
|||
case bfd_reloc_dangerous: |
|||
msg = _("internal error: dangerous relocation"); |
|||
break; |
|||
|
|||
default: |
|||
msg = _("internal error: unknown error"); |
|||
break; |
|||
} |
|||
|
|||
if (msg) |
|||
r = info->callbacks->warning |
|||
(info, msg, name, input_bfd, input_section, rel->r_offset); |
|||
|
|||
if (! r) |
|||
return false; |
|||
} |
|||
} |
|||
|
|||
return true; |
|||
} |
|||
|
|||
/* Return the section that should be marked against GC for a given
|
|||
relocation. */ |
|||
|
|||
static asection * |
|||
cris_elf_gc_mark_hook (abfd, info, rel, h, sym) |
|||
bfd * abfd; |
|||
struct bfd_link_info * info ATTRIBUTE_UNUSED; |
|||
Elf_Internal_Rela * rel; |
|||
struct elf_link_hash_entry * h; |
|||
Elf_Internal_Sym * sym; |
|||
{ |
|||
if (h != NULL) |
|||
{ |
|||
switch (ELF32_R_TYPE (rel->r_info)) |
|||
{ |
|||
case R_CRIS_GNU_VTINHERIT: |
|||
case R_CRIS_GNU_VTENTRY: |
|||
break; |
|||
|
|||
default: |
|||
switch (h->root.type) |
|||
{ |
|||
case bfd_link_hash_defined: |
|||
case bfd_link_hash_defweak: |
|||
return h->root.u.def.section; |
|||
|
|||
case bfd_link_hash_common: |
|||
return h->root.u.c.p->section; |
|||
|
|||
default: |
|||
break; |
|||
} |
|||
} |
|||
} |
|||
else |
|||
{ |
|||
if (!(elf_bad_symtab (abfd) |
|||
&& ELF_ST_BIND (sym->st_info) != STB_LOCAL) |
|||
&& ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) |
|||
&& sym->st_shndx != SHN_COMMON)) |
|||
{ |
|||
return bfd_section_from_elf_index (abfd, sym->st_shndx); |
|||
} |
|||
} |
|||
|
|||
return NULL; |
|||
} |
|||
|
|||
/* Update the got entry reference counts for the section being removed. */ |
|||
|
|||
static boolean |
|||
cris_elf_gc_sweep_hook (abfd, info, sec, relocs) |
|||
bfd * abfd ATTRIBUTE_UNUSED; |
|||
struct bfd_link_info * info ATTRIBUTE_UNUSED; |
|||
asection * sec ATTRIBUTE_UNUSED; |
|||
const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED; |
|||
{ |
|||
return true; |
|||
} |
|||
|
|||
/* Look through the relocs for a section during the first phase.
|
|||
Since we don't do .gots or .plts, we just need to consider the |
|||
virtual table relocs for gc. */ |
|||
|
|||
static boolean |
|||
cris_elf_check_relocs (abfd, info, sec, relocs) |
|||
bfd *abfd; |
|||
struct bfd_link_info *info; |
|||
asection *sec; |
|||
const Elf_Internal_Rela *relocs; |
|||
{ |
|||
Elf_Internal_Shdr *symtab_hdr; |
|||
struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; |
|||
const Elf_Internal_Rela *rel; |
|||
const Elf_Internal_Rela *rel_end; |
|||
|
|||
if (info->relocateable) |
|||
return true; |
|||
|
|||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
|||
sym_hashes = elf_sym_hashes (abfd); |
|||
sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym); |
|||
if (!elf_bad_symtab (abfd)) |
|||
sym_hashes_end -= symtab_hdr->sh_info; |
|||
|
|||
rel_end = relocs + sec->reloc_count; |
|||
for (rel = relocs; rel < rel_end; rel++) |
|||
{ |
|||
struct elf_link_hash_entry *h; |
|||
unsigned long r_symndx; |
|||
|
|||
r_symndx = ELF32_R_SYM (rel->r_info); |
|||
if (r_symndx < symtab_hdr->sh_info) |
|||
h = NULL; |
|||
else |
|||
h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
|||
|
|||
switch (ELF32_R_TYPE (rel->r_info)) |
|||
{ |
|||
/* This relocation describes the C++ object vtable hierarchy.
|
|||
Reconstruct it for later use during GC. */ |
|||
case R_CRIS_GNU_VTINHERIT: |
|||
if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
|||
return false; |
|||
break; |
|||
|
|||
/* This relocation describes which C++ vtable entries are actually
|
|||
used. Record for later use during GC. */ |
|||
case R_CRIS_GNU_VTENTRY: |
|||
if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
|||
return false; |
|||
break; |
|||
} |
|||
} |
|||
|
|||
return true; |
|||
} |
|||
|
|||
#define ELF_ARCH bfd_arch_cris |
|||
#define ELF_MACHINE_CODE EM_CRIS |
|||
#define ELF_MAXPAGESIZE 0x2000 |
|||
|
|||
#define TARGET_LITTLE_SYM bfd_elf32_cris_vec |
|||
#define TARGET_LITTLE_NAME "elf32-cris" |
|||
|
|||
/* For the time being, we have a leading underscore. Perhaps change to 0
|
|||
later, when |
|||
1) a.out isn't as dominating, and we can forget about multiformat links |
|||
and old assembly code. |
|||
2) there's an official solution to the symbol vs. register duality |
|||
problem; perhaps a % register prefix, optionally enforced. */ |
|||
#define elf_symbol_leading_char '_' |
|||
|
|||
#define elf_info_to_howto_rel NULL |
|||
#define elf_info_to_howto cris_info_to_howto_rela |
|||
#define elf_backend_relocate_section cris_elf_relocate_section |
|||
#define elf_backend_gc_mark_hook cris_elf_gc_mark_hook |
|||
#define elf_backend_gc_sweep_hook cris_elf_gc_sweep_hook |
|||
#define elf_backend_check_relocs cris_elf_check_relocs |
|||
|
|||
#define elf_backend_can_gc_sections 1 |
|||
|
|||
#define bfd_elf32_bfd_reloc_type_lookup cris_reloc_type_lookup |
|||
|
|||
/* Later, we my want to optimize RELA entries into REL entries for dynamic
|
|||
linking and libraries (if it's a win of any significance). Until then, |
|||
take the easy route. */ |
|||
#define elf_backend_may_use_rel_p 0 |
|||
#define elf_backend_may_use_rela_p 1 |
|||
|
|||
#include "elf32-target.h" |
|||
Loading…
Reference in new issue