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39f2796643
* libbfd.h: Rebuilt. * linker.c (generic_link_hash_newfunc): No longer static. * coffcode.h (coff_bfd_link_hash_create): Allow specific targets to override. * coff-h8300.c: Add two derived hash tables and their associated funtions and #defines for use by the h8300 linker. (h8300_reloc16_extra_cases, case R_MEM_INDIRECT): Create entries in the function vector as needed. Place the address of the function vector entry in the location specified by the R_MEM_INDIRECT reloc. Rewrite the vectors section contents as necessary. (h8300_bfd_link_add_symbols): New function for the h8300 linker. (coff_bfd_link_add_symbols): Define to use h8300 specific version. (coff_bfd_link_hash_table_create): Likewise. Linker changes for function vectors. HMSE.
1092 lines
32 KiB
C
1092 lines
32 KiB
C
/* BFD back-end for Hitachi H8/300 COFF binaries.
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Copyright 1990, 91, 92, 93, 94, 95, 1996 Free Software Foundation, Inc.
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Written by Steve Chamberlain, <sac@cygnus.com>.
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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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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., 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 "obstack.h"
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#include "libbfd.h"
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#include "bfdlink.h"
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#include "genlink.h"
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#include "coff/h8300.h"
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#include "coff/internal.h"
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#include "libcoff.h"
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#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1)
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/* We derive a hash table from the basic BFD hash table to
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hold entries in the function vector. Aside from the
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info stored by the basic hash table, we need the offset
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of a particular entry within the hash table as well as
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the offset where we'll add the next entry. */
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struct funcvec_hash_entry
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{
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/* The basic hash table entry. */
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struct bfd_hash_entry root;
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/* The offset within the vectors section where
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this entry lives. */
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bfd_vma offset;
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};
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struct funcvec_hash_table
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{
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/* The basic hash table. */
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struct bfd_hash_table root;
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bfd *abfd;
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/* Offset at which we'll add the next entry. */
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unsigned int offset;
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};
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static struct bfd_hash_entry *
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funcvec_hash_newfunc
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PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
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static boolean
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funcvec_hash_table_init
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PARAMS ((struct funcvec_hash_table *, bfd *,
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struct bfd_hash_entry *(*) PARAMS ((struct bfd_hash_entry *,
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struct bfd_hash_table *,
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const char *))));
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/* To lookup a value in the function vector hash table. */
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#define funcvec_hash_lookup(table, string, create, copy) \
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((struct funcvec_hash_entry *) \
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bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
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/* The derived h8300 COFF linker table. Note it's derived from
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the generic linker hash table, not the COFF backend linker hash
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table! We use this to attach additional data structures we
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need while linking on the h8300. */
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struct h8300_coff_link_hash_table
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{
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/* The main hash table. */
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struct generic_link_hash_table root;
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/* Section for the vectors table. This gets attached to a
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random input bfd, we keep it here for easy access. */
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asection *vectors_sec;
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/* Hash table of the functions we need to enter into the function
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vector. */
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struct funcvec_hash_table *funcvec_hash_table;
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};
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static struct bfd_link_hash_table *h8300_coff_link_hash_table_create
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PARAMS ((bfd *));
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/* Get the H8/300 COFF linker hash table from a link_info structure. */
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#define h8300_coff_hash_table(p) \
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((struct h8300_coff_link_hash_table *) ((coff_hash_table (p))))
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/* Initialize fields within a funcvec hash table entry. Called whenever
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a new entry is added to the funcvec hash table. */
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static struct bfd_hash_entry *
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funcvec_hash_newfunc (entry, gen_table, string)
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struct bfd_hash_entry *entry;
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struct bfd_hash_table *gen_table;
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const char *string;
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{
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struct funcvec_hash_entry *ret;
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struct funcvec_hash_table *table;
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ret = (struct funcvec_hash_entry *) entry;
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table = (struct funcvec_hash_table *) gen_table;
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/* Allocate the structure if it has not already been allocated by a
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subclass. */
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if (ret == NULL)
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ret = ((struct funcvec_hash_entry *)
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bfd_hash_allocate (gen_table,
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sizeof (struct funcvec_hash_entry)));
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if (ret == NULL)
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return NULL;
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/* Call the allocation method of the superclass. */
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ret = ((struct funcvec_hash_entry *)
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bfd_hash_newfunc ((struct bfd_hash_entry *) ret, gen_table, string));
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if (ret == NULL)
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return NULL;
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/* Note where this entry will reside in the function vector table. */
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ret->offset = table->offset;
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/* Bump the offset at which we store entries in the function
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vector. We'd like to bump up the size of the vectors section,
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but it's not easily available here. */
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if (bfd_get_mach (table->abfd) == bfd_mach_h8300)
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table->offset += 2;
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else if (bfd_get_mach (table->abfd) == bfd_mach_h8300h)
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table->offset += 4;
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else
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return NULL;
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/* Everything went OK. */
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return (struct bfd_hash_entry *) ret;
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}
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/* Initialize the function vector hash table. */
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static boolean
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funcvec_hash_table_init (table, abfd, newfunc)
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struct funcvec_hash_table *table;
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bfd *abfd;
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struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *,
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struct bfd_hash_table *,
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const char *));
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{
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/* Initialize our local fields, then call the generic initialization
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routine. */
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table->offset = 0;
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table->abfd = abfd;
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return (bfd_hash_table_init (&table->root, newfunc));
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}
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/* Create the derived linker hash table. We use a derived hash table
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basically to hold "static" information during an h8/300 coff link
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without using static variables. */
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static struct bfd_link_hash_table *
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h8300_coff_link_hash_table_create (abfd)
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bfd *abfd;
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{
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struct h8300_coff_link_hash_table *ret;
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ret = ((struct h8300_coff_link_hash_table *)
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bfd_alloc (abfd, sizeof (struct h8300_coff_link_hash_table)));
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if (ret == NULL)
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return NULL;
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if (!_bfd_link_hash_table_init (&ret->root.root, abfd, generic_link_hash_newfunc))
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{
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bfd_release (abfd, ret);
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return NULL;
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}
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/* Initialize our data. */
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ret->vectors_sec = NULL;
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ret->funcvec_hash_table = NULL;
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/* OK. Everything's intialized, return the base pointer. */
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return &ret->root.root;
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}
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/* special handling for H8/300 relocs.
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We only come here for pcrel stuff and return normally if not an -r link.
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When doing -r, we can't do any arithmetic for the pcrel stuff, because
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the code in reloc.c assumes that we can manipulate the targets of
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the pcrel branches. This isn't so, since the H8/300 can do relaxing,
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which means that the gap after the instruction may not be enough to
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contain the offset required for the branch, so we have to use the only
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the addend until the final link */
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static bfd_reloc_status_type
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special (abfd, reloc_entry, symbol, data, input_section, output_bfd,
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error_message)
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bfd *abfd;
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arelent *reloc_entry;
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asymbol *symbol;
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PTR data;
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asection *input_section;
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bfd *output_bfd;
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char **error_message;
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{
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if (output_bfd == (bfd *) NULL)
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return bfd_reloc_continue;
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return bfd_reloc_ok;
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}
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static reloc_howto_type howto_table[] =
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{
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HOWTO (R_RELBYTE, 0, 0, 8, false, 0, complain_overflow_bitfield, special, "8", false, 0x000000ff, 0x000000ff, false),
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HOWTO (R_RELWORD, 0, 1, 16, false, 0, complain_overflow_bitfield, special, "16", false, 0x0000ffff, 0x0000ffff, false),
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HOWTO (R_RELLONG, 0, 2, 32, false, 0, complain_overflow_bitfield, special, "32", false, 0xffffffff, 0xffffffff, false),
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HOWTO (R_PCRBYTE, 0, 0, 8, true, 0, complain_overflow_signed, special, "DISP8", false, 0x000000ff, 0x000000ff, true),
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HOWTO (R_PCRWORD, 0, 1, 16, true, 0, complain_overflow_signed, special, "DISP16", false, 0x0000ffff, 0x0000ffff, true),
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HOWTO (R_PCRLONG, 0, 2, 32, true, 0, complain_overflow_signed, special, "DISP32", false, 0xffffffff, 0xffffffff, true),
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HOWTO (R_MOVB1, 0, 1, 16, false, 0, complain_overflow_bitfield, special, "16/8", false, 0x0000ffff, 0x0000ffff, false),
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HOWTO (R_MOVB2, 0, 1, 16, false, 0, complain_overflow_bitfield, special, "8/16", false, 0x0000ffff, 0x0000ffff, false),
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HOWTO (R_JMP1, 0, 1, 16, false, 0, complain_overflow_bitfield, special, "16/pcrel", false, 0x0000ffff, 0x0000ffff, false),
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HOWTO (R_JMP2, 0, 0, 8, false, 0, complain_overflow_bitfield, special, "pcrecl/16", false, 0x000000ff, 0x000000ff, false),
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HOWTO (R_JMPL1, 0, 2, 32, false, 0, complain_overflow_bitfield, special, "24/pcrell", false, 0x00ffffff, 0x00ffffff, false),
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HOWTO (R_JMPL_B8, 0, 0, 8, false, 0, complain_overflow_bitfield, special, "pc8/24", false, 0x000000ff, 0x000000ff, false),
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HOWTO (R_MOVLB1, 0, 1, 16, false, 0, complain_overflow_bitfield,special, "24/8", false, 0x0000ffff, 0x0000ffff, false),
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HOWTO (R_MOVLB2, 0, 1, 16, false, 0, complain_overflow_bitfield, special, "8/24", false, 0x0000ffff, 0x0000ffff, false),
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/* An indirect reference to a function. This causes the function's address
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to be added to the function vector in lo-mem and puts the address of
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the function vector's entry in the jsr instruction. */
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HOWTO (R_MEM_INDIRECT, 0, 0, 8, false, 0, complain_overflow_bitfield, special, "8/indirect", false, 0x000000ff, 0x000000ff, false),
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};
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/* Turn a howto into a reloc number */
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#define SELECT_RELOC(x,howto) \
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{ x.r_type = select_reloc(howto); }
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#define BADMAG(x) (H8300BADMAG(x)&& H8300HBADMAG(x))
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#define H8300 1 /* Customize coffcode.h */
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#define __A_MAGIC_SET__
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/* Code to swap in the reloc */
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#define SWAP_IN_RELOC_OFFSET bfd_h_get_32
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#define SWAP_OUT_RELOC_OFFSET bfd_h_put_32
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#define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
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dst->r_stuff[0] = 'S'; \
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dst->r_stuff[1] = 'C';
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static int
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select_reloc (howto)
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reloc_howto_type *howto;
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{
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return howto->type;
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}
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/* Code to turn a r_type into a howto ptr, uses the above howto table
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*/
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static void
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rtype2howto (internal, dst)
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arelent *internal;
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struct internal_reloc *dst;
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{
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switch (dst->r_type)
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{
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case R_RELBYTE:
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internal->howto = howto_table + 0;
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break;
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case R_RELWORD:
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internal->howto = howto_table + 1;
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break;
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case R_RELLONG:
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internal->howto = howto_table + 2;
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break;
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case R_PCRBYTE:
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internal->howto = howto_table + 3;
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break;
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case R_PCRWORD:
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internal->howto = howto_table + 4;
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break;
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case R_PCRLONG:
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internal->howto = howto_table + 5;
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break;
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case R_MOVB1:
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internal->howto = howto_table + 6;
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break;
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case R_MOVB2:
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internal->howto = howto_table + 7;
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break;
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case R_JMP1:
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internal->howto = howto_table + 8;
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break;
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case R_JMP2:
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internal->howto = howto_table + 9;
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break;
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case R_JMPL1:
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internal->howto = howto_table + 10;
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break;
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case R_JMPL_B8:
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internal->howto = howto_table + 11;
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break;
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case R_MOVLB1:
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internal->howto = howto_table + 12;
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break;
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case R_MOVLB2:
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internal->howto = howto_table + 13;
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break;
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case R_MEM_INDIRECT:
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internal->howto = howto_table + 14;
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break;
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default:
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abort ();
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break;
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}
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}
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#define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry)
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/* Perform any necessaru magic to the addend in a reloc entry */
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#define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
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cache_ptr->addend = ext_reloc.r_offset;
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#define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
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reloc_processing(relent, reloc, symbols, abfd, section)
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static void
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reloc_processing (relent, reloc, symbols, abfd, section)
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arelent * relent;
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struct internal_reloc *reloc;
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asymbol ** symbols;
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bfd * abfd;
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asection * section;
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{
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relent->address = reloc->r_vaddr;
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rtype2howto (relent, reloc);
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if (((int) reloc->r_symndx) > 0)
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{
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relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
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}
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else
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{
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relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
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}
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relent->addend = reloc->r_offset;
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relent->address -= section->vma;
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/* relent->section = 0;*/
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}
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static int
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h8300_reloc16_estimate(abfd, input_section, reloc, shrink, link_info)
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bfd *abfd;
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asection *input_section;
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arelent *reloc;
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unsigned int shrink;
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struct bfd_link_info *link_info;
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{
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bfd_vma value;
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bfd_vma dot;
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bfd_vma gap;
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/* The address of the thing to be relocated will have moved back by
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the size of the shrink - but we don't change reloc->address here,
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since we need it to know where the relocation lives in the source
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uncooked section */
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/* reloc->address -= shrink; conceptual */
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bfd_vma address = reloc->address - shrink;
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switch (reloc->howto->type)
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{
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case R_MOVB2:
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case R_JMP2:
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shrink+=2;
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break;
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/* Thing is a move one byte */
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case R_MOVB1:
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value = bfd_coff_reloc16_get_value(reloc, link_info, input_section);
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if (value >= 0xff00)
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{
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/* Change the reloc type from 16bit, possible 8 to 8bit
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possible 16 */
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reloc->howto = reloc->howto + 1;
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/* The place to relc moves back by one */
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/* This will be two bytes smaller in the long run */
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shrink +=2 ;
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bfd_perform_slip(abfd, 2, input_section, address);
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}
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break;
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/* This is the 24 bit branch which could become an 8 bitter,
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the relocation points to the first byte of the insn, not the
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actual data */
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case R_JMPL1:
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value = bfd_coff_reloc16_get_value(reloc, link_info, input_section);
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dot = input_section->output_section->vma +
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input_section->output_offset + address;
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/* See if the address we're looking at within 127 bytes of where
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we are, if so then we can use a small branch rather than the
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jump we were going to */
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gap = value - dot ;
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if (-120 < (long)gap && (long)gap < 120 )
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{
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/* Change the reloc type from 24bit, possible 8 to 8bit
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possible 32 */
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reloc->howto = reloc->howto + 1;
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/* This will be two bytes smaller in the long run */
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shrink +=2 ;
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bfd_perform_slip(abfd, 2, input_section, address);
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}
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break;
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case R_JMP1:
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value = bfd_coff_reloc16_get_value(reloc, link_info, input_section);
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dot = input_section->output_section->vma +
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input_section->output_offset + address;
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/* See if the address we're looking at within 127 bytes of where
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we are, if so then we can use a small branch rather than the
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jump we were going to */
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gap = value - (dot - shrink);
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if (-120 < (long)gap && (long)gap < 120 )
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{
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/* Change the reloc type from 16bit, possible 8 to 8bit
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possible 16 */
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reloc->howto = reloc->howto + 1;
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/* The place to relc moves back by one */
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/* This will be two bytes smaller in the long run */
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shrink +=2 ;
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bfd_perform_slip(abfd, 2, input_section, address);
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}
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break;
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}
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|
return shrink;
|
|
}
|
|
|
|
|
|
/* First phase of a relaxing link */
|
|
|
|
/* Reloc types
|
|
large small
|
|
R_MOVB1 R_MOVB2 mov.b with 16bit or 8 bit address
|
|
R_JMP1 R_JMP2 jmp or pcrel branch
|
|
R_JMPL1 R_JMPL_B8 24jmp or pcrel branch
|
|
R_MOVLB1 R_MOVLB2 24 or 8 bit reloc for mov.b
|
|
|
|
*/
|
|
|
|
|
|
static void
|
|
h8300_reloc16_extra_cases (abfd, link_info, link_order, reloc, data, src_ptr,
|
|
dst_ptr)
|
|
bfd *abfd;
|
|
struct bfd_link_info *link_info;
|
|
struct bfd_link_order *link_order;
|
|
arelent *reloc;
|
|
bfd_byte *data;
|
|
unsigned int *src_ptr;
|
|
unsigned int *dst_ptr;
|
|
{
|
|
unsigned int src_address = *src_ptr;
|
|
unsigned int dst_address = *dst_ptr;
|
|
asection *input_section = link_order->u.indirect.section;
|
|
|
|
switch (reloc->howto->type)
|
|
{
|
|
/* A 24 bit branch which could be a 8 bit pcrel, really pointing to
|
|
the byte before the 24bit hole, so we can treat it as a 32bit pointer */
|
|
case R_PCRBYTE:
|
|
{
|
|
bfd_vma dot = link_order->offset
|
|
+ dst_address
|
|
+ link_order->u.indirect.section->output_section->vma;
|
|
int gap = (bfd_coff_reloc16_get_value (reloc, link_info, input_section)
|
|
- dot);
|
|
if (gap > 127 || gap < -128)
|
|
{
|
|
if (! ((*link_info->callbacks->reloc_overflow)
|
|
(link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
|
|
reloc->howto->name, reloc->addend, input_section->owner,
|
|
input_section, reloc->address)))
|
|
abort ();
|
|
}
|
|
gap &= ~1;
|
|
bfd_put_8 (abfd, gap, data + dst_address);
|
|
dst_address++;
|
|
src_address++;
|
|
|
|
break;
|
|
}
|
|
case R_PCRWORD:
|
|
{
|
|
bfd_vma dot = link_order->offset
|
|
+ dst_address
|
|
+ link_order->u.indirect.section->output_section->vma;
|
|
int gap = (bfd_coff_reloc16_get_value (reloc, link_info, input_section)
|
|
- dot) - 1;
|
|
if (gap > 32767 || gap < -32768)
|
|
{
|
|
if (! ((*link_info->callbacks->reloc_overflow)
|
|
(link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
|
|
reloc->howto->name, reloc->addend, input_section->owner,
|
|
input_section, reloc->address)))
|
|
abort ();
|
|
}
|
|
|
|
bfd_put_16 (abfd, gap, data + dst_address);
|
|
dst_address+=2;
|
|
src_address+=2;
|
|
|
|
break;
|
|
}
|
|
|
|
case R_RELBYTE:
|
|
{
|
|
unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info,
|
|
input_section);
|
|
if (gap < 0xff
|
|
|| (gap >= 0x0000ff00
|
|
&& gap <= 0x0000ffff)
|
|
|| ( gap >= 0x00ffff00
|
|
&& gap <= 0x00ffffff)
|
|
|| ( gap >= 0xffffff00
|
|
&& gap <= 0xffffffff))
|
|
{
|
|
bfd_put_8 (abfd, gap, data + dst_address);
|
|
dst_address += 1;
|
|
src_address += 1;
|
|
}
|
|
else
|
|
{
|
|
if (! ((*link_info->callbacks->reloc_overflow)
|
|
(link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
|
|
reloc->howto->name, reloc->addend, input_section->owner,
|
|
input_section, reloc->address)))
|
|
abort ();
|
|
}
|
|
}
|
|
break;
|
|
case R_JMP1:
|
|
/* A relword which would have like to have been a pcrel */
|
|
case R_MOVB1:
|
|
/* A relword which would like to have been modified but
|
|
didn't make it */
|
|
case R_RELWORD:
|
|
bfd_put_16 (abfd,
|
|
bfd_coff_reloc16_get_value (reloc, link_info, input_section),
|
|
data + dst_address);
|
|
dst_address += 2;
|
|
src_address += 2;
|
|
break;
|
|
case R_RELLONG:
|
|
bfd_put_32 (abfd,
|
|
bfd_coff_reloc16_get_value (reloc, link_info, input_section),
|
|
data + dst_address);
|
|
dst_address += 4;
|
|
src_address += 4;
|
|
break;
|
|
|
|
case R_MOVB2:
|
|
/* Special relaxed type, there will be a gap between where we
|
|
get stuff from and where we put stuff to now
|
|
|
|
for a mov.b @aa:16 -> mov.b @aa:8
|
|
opcode 0x6a 0x0y offset
|
|
-> 0x2y off
|
|
*/
|
|
if (data[dst_address - 1] != 0x6a)
|
|
abort ();
|
|
switch (data[src_address] & 0xf0)
|
|
{
|
|
case 0x00:
|
|
/* Src is memory */
|
|
data[dst_address - 1] = (data[src_address] & 0xf) | 0x20;
|
|
break;
|
|
case 0x80:
|
|
/* Src is reg */
|
|
data[dst_address - 1] = (data[src_address] & 0xf) | 0x30;
|
|
break;
|
|
default:
|
|
abort ();
|
|
}
|
|
|
|
/* the offset must fit ! after all, what was all the relaxing
|
|
about ? */
|
|
|
|
bfd_put_8 (abfd,
|
|
bfd_coff_reloc16_get_value (reloc, link_info, input_section),
|
|
data + dst_address);
|
|
|
|
/* Note the magic - src goes up by two bytes, but dst by only
|
|
one */
|
|
dst_address += 1;
|
|
src_address += 3;
|
|
|
|
break;
|
|
|
|
case R_JMP2:
|
|
|
|
/* Speciial relaxed type */
|
|
{
|
|
bfd_vma dot = link_order->offset
|
|
+ dst_address
|
|
+ link_order->u.indirect.section->output_section->vma;
|
|
|
|
int gap = (bfd_coff_reloc16_get_value (reloc, link_info, input_section)
|
|
- dot - 1);
|
|
|
|
if ((gap & ~0xff) != 0 && ((gap & 0xff00) != 0xff00))
|
|
abort ();
|
|
|
|
bfd_put_8 (abfd, gap, data + dst_address);
|
|
|
|
switch (data[dst_address - 1])
|
|
{
|
|
case 0x5e:
|
|
/* jsr -> bsr */
|
|
bfd_put_8 (abfd, 0x55, data + dst_address - 1);
|
|
break;
|
|
case 0x5a:
|
|
/* jmp ->bra */
|
|
bfd_put_8 (abfd, 0x40, data + dst_address - 1);
|
|
break;
|
|
|
|
default:
|
|
abort ();
|
|
}
|
|
dst_address++;
|
|
src_address += 3;
|
|
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case R_JMPL_B8: /* 24 bit branch which is now 8 bits */
|
|
|
|
/* Speciial relaxed type */
|
|
{
|
|
bfd_vma dot = link_order->offset
|
|
+ dst_address
|
|
+ link_order->u.indirect.section->output_section->vma;
|
|
|
|
int gap = (bfd_coff_reloc16_get_value (reloc, link_info, input_section)
|
|
- dot - 2);
|
|
|
|
if ((gap & ~0xff) != 0 && ((gap & 0xff00) != 0xff00))
|
|
abort ();
|
|
|
|
switch (data[src_address])
|
|
{
|
|
case 0x5e:
|
|
/* jsr -> bsr */
|
|
bfd_put_8 (abfd, 0x55, data + dst_address);
|
|
break;
|
|
case 0x5a:
|
|
/* jmp ->bra */
|
|
bfd_put_8 (abfd, 0x40, data + dst_address);
|
|
break;
|
|
|
|
default:
|
|
bfd_put_8 (abfd, 0xde, data + dst_address);
|
|
break;
|
|
}
|
|
|
|
bfd_put_8 (abfd, gap, data + dst_address + 1);
|
|
dst_address += 2;
|
|
src_address += 4;
|
|
|
|
break;
|
|
}
|
|
|
|
case R_JMPL1:
|
|
{
|
|
int v = bfd_coff_reloc16_get_value (reloc, link_info, input_section);
|
|
int o = bfd_get_32 (abfd, data + src_address);
|
|
v = (v & 0x00ffffff) | (o & 0xff000000);
|
|
bfd_put_32 (abfd, v, data + dst_address);
|
|
dst_address += 4;
|
|
src_address += 4;
|
|
}
|
|
|
|
break;
|
|
|
|
|
|
/* A 24 bit mov which could be an 8 bit move, really pointing to
|
|
the byte before the 24bit hole, so we can treat it as a 32bit pointer */
|
|
case R_MOVLB1:
|
|
{
|
|
int v = bfd_coff_reloc16_get_value (reloc, link_info, input_section);
|
|
int o = bfd_get_32 (abfd, data + dst_address);
|
|
v = (v & 0x00ffffff) | (o & 0xff000000);
|
|
bfd_put_32 (abfd, v, data + dst_address);
|
|
dst_address += 4;
|
|
src_address += 4;
|
|
}
|
|
|
|
break;
|
|
|
|
/* An 8bit memory indirect instruction (jmp/jsr).
|
|
|
|
There's several things that need to be done to handle
|
|
this relocation.
|
|
|
|
If this is a reloc against the absolute symbol, then
|
|
we should handle it just R_RELBYTE. Likewise if it's
|
|
for a symbol with a value ge 0 and le 0xff.
|
|
|
|
Otherwise it's a jump/call through the function vector,
|
|
and the linker is expected to set up the function vector
|
|
and put the right value into the jump/call instruction. */
|
|
case R_MEM_INDIRECT:
|
|
{
|
|
/* We need to find the symbol so we can determine it's
|
|
address in the function vector table. */
|
|
asymbol *symbol;
|
|
bfd_vma value;
|
|
char *name;
|
|
struct funcvec_hash_entry *h;
|
|
asection *vectors_sec = h8300_coff_hash_table (link_info)->vectors_sec;
|
|
|
|
/* First see if this is a reloc against the absolute symbol
|
|
or against a symbol with a nonnegative value <= 0xff. */
|
|
symbol = *(reloc->sym_ptr_ptr);
|
|
value = bfd_coff_reloc16_get_value (reloc, link_info, input_section);
|
|
if (symbol == bfd_abs_section_ptr->symbol
|
|
|| (value >= 0 && value <= 0xff))
|
|
{
|
|
/* This should be handled in a manner very similar to
|
|
R_RELBYTES. If the value is in range, then just slam
|
|
the value into the right location. Else trigger a
|
|
reloc overflow callback. */
|
|
if (value >= 0 && value <= 0xff)
|
|
{
|
|
bfd_put_8 (abfd, value, data + dst_address);
|
|
dst_address += 1;
|
|
src_address += 1;
|
|
}
|
|
else
|
|
{
|
|
if (! ((*link_info->callbacks->reloc_overflow)
|
|
(link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
|
|
reloc->howto->name, reloc->addend, input_section->owner,
|
|
input_section, reloc->address)))
|
|
abort ();
|
|
}
|
|
break;
|
|
}
|
|
|
|
/* This is a jump/call through a function vector, and we're
|
|
expected to create the function vector ourselves.
|
|
|
|
First look up this symbol in the linker hash table -- we need
|
|
the derived linker symbol which holds this symbol's index
|
|
in the function vector. */
|
|
name = symbol->name;
|
|
if (symbol->flags & BSF_LOCAL)
|
|
{
|
|
char *new_name = bfd_malloc (strlen (name) + 9);
|
|
if (new_name == NULL)
|
|
abort ();
|
|
|
|
strcpy (new_name, name);
|
|
sprintf (new_name + strlen (name), "_%08x",
|
|
(int)symbol->section);
|
|
name = new_name;
|
|
}
|
|
|
|
h = funcvec_hash_lookup (h8300_coff_hash_table (link_info)->funcvec_hash_table,
|
|
name, false, false);
|
|
|
|
/* This shouldn't ever happen. If it does that means we've got
|
|
data corruption of some kind. Aborting seems like a reasonable
|
|
think to do here. */
|
|
if (h == NULL || vectors_sec == NULL)
|
|
abort ();
|
|
|
|
/* Place the address of the function vector entry into the
|
|
reloc's address. */
|
|
bfd_put_8 (abfd,
|
|
vectors_sec->output_offset + h->offset,
|
|
data + dst_address);
|
|
|
|
dst_address++;
|
|
src_address++;
|
|
|
|
/* Now create an entry in the function vector itself. */
|
|
if (bfd_get_mach (input_section->owner) == bfd_mach_h8300)
|
|
bfd_put_16 (abfd,
|
|
bfd_coff_reloc16_get_value (reloc,
|
|
link_info,
|
|
input_section),
|
|
vectors_sec->contents + h->offset);
|
|
else if (bfd_get_mach (input_section->owner) == bfd_mach_h8300h)
|
|
bfd_put_32 (abfd,
|
|
bfd_coff_reloc16_get_value (reloc,
|
|
link_info,
|
|
input_section),
|
|
vectors_sec->contents + h->offset);
|
|
else
|
|
abort ();
|
|
|
|
/* Gross. We've already written the contents of the vector section
|
|
before we get here... So we write it again with the new data. */
|
|
bfd_set_section_contents (vectors_sec->output_section->owner,
|
|
vectors_sec->output_section,
|
|
vectors_sec->contents,
|
|
vectors_sec->output_offset,
|
|
vectors_sec->_raw_size);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
abort ();
|
|
break;
|
|
|
|
}
|
|
|
|
*src_ptr = src_address;
|
|
*dst_ptr = dst_address;
|
|
}
|
|
|
|
|
|
/* Routine for the h8300 linker.
|
|
|
|
This routine is necessary to handle the special R_MEM_INDIRECT
|
|
relocs on the h8300. It's responsible for generating a vectors
|
|
section and attaching it to an input bfd as well as sizing
|
|
the vectors section. It also creates our vectors hash table.
|
|
|
|
It uses the generic linker routines to actually add the symbols.
|
|
from this BFD to the bfd linker hash table. It may add a few
|
|
selected static symbols to the bfd linker hash table. */
|
|
|
|
static boolean
|
|
h8300_bfd_link_add_symbols(abfd, info)
|
|
bfd *abfd;
|
|
struct bfd_link_info *info;
|
|
{
|
|
asection *sec;
|
|
struct funcvec_hash_table *funcvec_hash_table;
|
|
|
|
/* If we haven't created a vectors section, do so now. */
|
|
if (!h8300_coff_hash_table (info)->vectors_sec)
|
|
{
|
|
flagword flags;
|
|
|
|
/* Make sure the appropriate flags are set, including SEC_IN_MEMORY. */
|
|
flags = (SEC_ALLOC | SEC_LOAD
|
|
| SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_READONLY);
|
|
h8300_coff_hash_table (info)->vectors_sec = bfd_make_section (abfd,
|
|
".vectors");
|
|
|
|
/* If the section wasn't created, or we couldn't set the flags,
|
|
quit quickly now, rather than dieing a painful death later. */
|
|
if (! h8300_coff_hash_table (info)->vectors_sec
|
|
|| ! bfd_set_section_flags (abfd,
|
|
h8300_coff_hash_table(info)->vectors_sec,
|
|
flags))
|
|
return false;
|
|
|
|
/* Also create the vector hash table. */
|
|
funcvec_hash_table = ((struct funcvec_hash_table *)
|
|
bfd_alloc (abfd, sizeof (struct funcvec_hash_table)));
|
|
|
|
if (!funcvec_hash_table)
|
|
return false;
|
|
|
|
/* And initialize the funcvec hash table. */
|
|
if (!funcvec_hash_table_init (funcvec_hash_table, abfd,
|
|
funcvec_hash_newfunc))
|
|
{
|
|
bfd_release (abfd, funcvec_hash_table);
|
|
return false;
|
|
}
|
|
|
|
/* Store away a pointer to the funcvec hash table. */
|
|
h8300_coff_hash_table (info)->funcvec_hash_table = funcvec_hash_table;
|
|
}
|
|
|
|
/* Load up the function vector hash table. */
|
|
funcvec_hash_table = h8300_coff_hash_table (info)->funcvec_hash_table;
|
|
|
|
/* Add the symbols using the generic code. */
|
|
_bfd_generic_link_add_symbols (abfd, info);
|
|
|
|
/* Now scan the relocs for all the sections in this bfd; create
|
|
additional space in the .vectors section as needed. */
|
|
for (sec = abfd->sections; sec; sec = sec->next)
|
|
{
|
|
unsigned long reloc_size, reloc_count, i;
|
|
asymbol **symbols;
|
|
arelent **relocs;
|
|
|
|
/* Suck in the relocs, symbols & canonicalize them. */
|
|
reloc_size = bfd_get_reloc_upper_bound (abfd, sec);
|
|
if (reloc_size <= 0)
|
|
continue;
|
|
|
|
relocs = (arelent **)bfd_malloc ((size_t)reloc_size);
|
|
if (!relocs)
|
|
return false;
|
|
|
|
/* The symbols should have been read in by _bfd_generic link_add_symbols
|
|
call abovec, so we can cheat and use the pointer to them that was
|
|
saved in the above call. */
|
|
symbols = _bfd_generic_link_get_symbols(abfd);
|
|
reloc_count = bfd_canonicalize_reloc (abfd, sec, relocs, symbols);
|
|
|
|
/* Now walk through all the relocations in this section. */
|
|
for (i = 0; i < reloc_count; i++)
|
|
{
|
|
arelent *reloc = relocs[i];
|
|
asymbol *symbol = *(reloc->sym_ptr_ptr);
|
|
char *name;
|
|
|
|
/* We've got an indirect reloc. See if we need to add it
|
|
to the function vector table. At this point, we have
|
|
to add a new entry for each unique symbol referenced
|
|
by an R_MEM_INDIRECT relocation except for a reloc
|
|
against the absolute section symbol. */
|
|
if (reloc->howto->type == R_MEM_INDIRECT
|
|
&& symbol != bfd_abs_section_ptr->symbol)
|
|
|
|
{
|
|
struct funcvec_hash_entry *h;
|
|
|
|
name = symbol->name;
|
|
if (symbol->flags & BSF_LOCAL)
|
|
{
|
|
char *new_name = bfd_malloc (strlen (name) + 9);
|
|
|
|
if (new_name == NULL)
|
|
abort ();
|
|
|
|
strcpy (new_name, name);
|
|
sprintf (new_name + strlen (name), "_%08x",
|
|
(int)symbol->section);
|
|
name = new_name;
|
|
}
|
|
|
|
/* Look this symbol up in the function vector hash table. */
|
|
h = funcvec_hash_lookup (h8300_coff_hash_table (info)->funcvec_hash_table,
|
|
name, false, false);
|
|
|
|
|
|
/* If this symbol isn't already in the hash table, add
|
|
it and bump up the size of the hash table. */
|
|
if (h == NULL)
|
|
{
|
|
h = funcvec_hash_lookup (h8300_coff_hash_table (info)->funcvec_hash_table,
|
|
name, true, true);
|
|
if (h == NULL)
|
|
{
|
|
free (relocs);
|
|
return false;
|
|
}
|
|
|
|
/* Bump the size of the vectors section. Each vector
|
|
takes 2 bytes on the h8300 and 4 bytes on the h8300h. */
|
|
if (bfd_get_mach (abfd) == bfd_mach_h8300)
|
|
h8300_coff_hash_table (info)->vectors_sec->_raw_size += 2;
|
|
else if (bfd_get_mach (abfd) == bfd_mach_h8300h)
|
|
h8300_coff_hash_table (info)->vectors_sec->_raw_size += 4;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* We're done with the relocations, release them. */
|
|
free (relocs);
|
|
}
|
|
|
|
/* Now actually allocate some space for the function vector. It's
|
|
wasteful to do this more than once, but this is easier. */
|
|
if (h8300_coff_hash_table (info)->vectors_sec->_raw_size != 0)
|
|
{
|
|
/* Free the old contents. */
|
|
if (h8300_coff_hash_table (info)->vectors_sec->contents)
|
|
free (h8300_coff_hash_table (info)->vectors_sec->contents);
|
|
|
|
/* Allocate new contents. */
|
|
h8300_coff_hash_table (info)->vectors_sec->contents
|
|
= bfd_malloc (h8300_coff_hash_table (info)->vectors_sec->_raw_size);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
#define coff_reloc16_extra_cases h8300_reloc16_extra_cases
|
|
#define coff_reloc16_estimate h8300_reloc16_estimate
|
|
#define coff_bfd_link_add_symbols h8300_bfd_link_add_symbols
|
|
#define coff_bfd_link_hash_table_create h8300_coff_link_hash_table_create
|
|
|
|
#define COFF_LONG_FILENAMES
|
|
#include "coffcode.h"
|
|
|
|
|
|
#undef coff_bfd_get_relocated_section_contents
|
|
#undef coff_bfd_relax_section
|
|
#define coff_bfd_get_relocated_section_contents \
|
|
bfd_coff_reloc16_get_relocated_section_contents
|
|
#define coff_bfd_relax_section bfd_coff_reloc16_relax_section
|
|
|
|
|
|
|
|
const bfd_target h8300coff_vec =
|
|
{
|
|
"coff-h8300", /* name */
|
|
bfd_target_coff_flavour,
|
|
BFD_ENDIAN_BIG, /* data byte order is big */
|
|
BFD_ENDIAN_BIG, /* header byte order is big */
|
|
|
|
(HAS_RELOC | EXEC_P | /* object flags */
|
|
HAS_LINENO | HAS_DEBUG |
|
|
HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE ),
|
|
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
|
|
'_', /* leading char */
|
|
'/', /* ar_pad_char */
|
|
15, /* ar_max_namelen */
|
|
bfd_getb64, bfd_getb_signed_64, bfd_putb64,
|
|
bfd_getb32, bfd_getb_signed_32, bfd_putb32,
|
|
bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
|
|
bfd_getb64, bfd_getb_signed_64, bfd_putb64,
|
|
bfd_getb32, bfd_getb_signed_32, bfd_putb32,
|
|
bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
|
|
|
|
{_bfd_dummy_target, coff_object_p, /* bfd_check_format */
|
|
bfd_generic_archive_p, _bfd_dummy_target},
|
|
{bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
|
|
bfd_false},
|
|
{bfd_false, coff_write_object_contents, /* bfd_write_contents */
|
|
_bfd_write_archive_contents, bfd_false},
|
|
|
|
BFD_JUMP_TABLE_GENERIC (coff),
|
|
BFD_JUMP_TABLE_COPY (coff),
|
|
BFD_JUMP_TABLE_CORE (_bfd_nocore),
|
|
BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
|
|
BFD_JUMP_TABLE_SYMBOLS (coff),
|
|
BFD_JUMP_TABLE_RELOCS (coff),
|
|
BFD_JUMP_TABLE_WRITE (coff),
|
|
BFD_JUMP_TABLE_LINK (coff),
|
|
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
|
|
|
|
COFF_SWAP_TABLE,
|
|
};
|