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Diffstat (limited to 'contrib/gdb/bfd/coff-h8300.c')
-rw-r--r--contrib/gdb/bfd/coff-h8300.c650
1 files changed, 650 insertions, 0 deletions
diff --git a/contrib/gdb/bfd/coff-h8300.c b/contrib/gdb/bfd/coff-h8300.c
new file mode 100644
index 0000000000000..48d0d5a213b74
--- /dev/null
+++ b/contrib/gdb/bfd/coff-h8300.c
@@ -0,0 +1,650 @@
+/* BFD back-end for Hitachi H8/300 COFF binaries.
+ Copyright 1990, 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+ Written by Steve Chamberlain, <sac@cygnus.com>.
+
+This file is part of BFD, the Binary File Descriptor library.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "obstack.h"
+#include "libbfd.h"
+#include "bfdlink.h"
+#include "genlink.h"
+#include "coff/h8300.h"
+#include "coff/internal.h"
+#include "libcoff.h"
+
+#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1)
+
+
+/* special handling for H8/300 relocs.
+ We only come here for pcrel stuff and return normally if not an -r link.
+ When doing -r, we can't do any arithmetic for the pcrel stuff, because
+ the code in reloc.c assumes that we can manipulate the targets of
+ the pcrel branches. This isn't so, since the H8/300 can do relaxing,
+ which means that the gap after the instruction may not be enough to
+ contain the offset required for the branch, so we have to use the only
+ the addend until the final link */
+
+static bfd_reloc_status_type
+special (abfd, reloc_entry, symbol, data, input_section, output_bfd,
+ error_message)
+ bfd *abfd;
+ arelent *reloc_entry;
+ asymbol *symbol;
+ PTR data;
+ asection *input_section;
+ bfd *output_bfd;
+ char **error_message;
+{
+ if (output_bfd == (bfd *) NULL)
+ return bfd_reloc_continue;
+
+ return bfd_reloc_ok;
+}
+
+static reloc_howto_type howto_table[] =
+{
+ HOWTO (R_RELBYTE, 0, 0, 8, false, 0, complain_overflow_bitfield, special, "8", false, 0x000000ff, 0x000000ff, false),
+ HOWTO (R_RELWORD, 0, 1, 16, false, 0, complain_overflow_bitfield, special, "16", false, 0x0000ffff, 0x0000ffff, false),
+ HOWTO (R_RELLONG, 0, 2, 32, false, 0, complain_overflow_bitfield, special, "32", false, 0xffffffff, 0xffffffff, false),
+ HOWTO (R_PCRBYTE, 0, 0, 8, true, 0, complain_overflow_signed, special, "DISP8", false, 0x000000ff, 0x000000ff, true),
+ HOWTO (R_PCRWORD, 0, 1, 16, true, 0, complain_overflow_signed, special, "DISP16", false, 0x0000ffff, 0x0000ffff, true),
+ HOWTO (R_PCRLONG, 0, 2, 32, true, 0, complain_overflow_signed, special, "DISP32", false, 0xffffffff, 0xffffffff, true),
+ HOWTO (R_MOVB1, 0, 1, 16, false, 0, complain_overflow_bitfield, special, "16/8", false, 0x0000ffff, 0x0000ffff, false),
+ HOWTO (R_MOVB2, 0, 1, 16, false, 0, complain_overflow_bitfield, special, "8/16", false, 0x0000ffff, 0x0000ffff, false),
+ HOWTO (R_JMP1, 0, 1, 16, false, 0, complain_overflow_bitfield, special, "16/pcrel", false, 0x0000ffff, 0x0000ffff, false),
+ HOWTO (R_JMP2, 0, 0, 8, false, 0, complain_overflow_bitfield, special, "pcrecl/16", false, 0x000000ff, 0x000000ff, false),
+
+
+ HOWTO (R_JMPL1, 0, 2, 32, false, 0, complain_overflow_bitfield, special, "24/pcrell", false, 0x00ffffff, 0x00ffffff, false),
+ HOWTO (R_JMPL_B8, 0, 0, 8, false, 0, complain_overflow_bitfield, special, "pc8/24", false, 0x000000ff, 0x000000ff, false),
+
+ HOWTO (R_MOVLB1, 0, 1, 16, false, 0, complain_overflow_bitfield,special, "24/8", false, 0x0000ffff, 0x0000ffff, false),
+ HOWTO (R_MOVLB2, 0, 1, 16, false, 0, complain_overflow_bitfield, special, "8/24", false, 0x0000ffff, 0x0000ffff, false),
+
+ /* An indirect reference to a function. This causes the function's address
+ to be added to the function vector in lo-mem and puts the address of
+ the function vector's entry in the jsr instruction. */
+ HOWTO (R_MEM_INDIRECT, 0, 0, 8, false, 0, complain_overflow_bitfield, special, "8/indirect", false, 0x000000ff, 0x000000ff, false),
+
+};
+
+
+/* Turn a howto into a reloc number */
+
+#define SELECT_RELOC(x,howto) \
+ { x.r_type = select_reloc(howto); }
+
+#define BADMAG(x) (H8300BADMAG(x)&& H8300HBADMAG(x))
+#define H8300 1 /* Customize coffcode.h */
+#define __A_MAGIC_SET__
+
+
+
+/* Code to swap in the reloc */
+#define SWAP_IN_RELOC_OFFSET bfd_h_get_32
+#define SWAP_OUT_RELOC_OFFSET bfd_h_put_32
+#define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
+ dst->r_stuff[0] = 'S'; \
+ dst->r_stuff[1] = 'C';
+
+
+static int
+select_reloc (howto)
+ reloc_howto_type *howto;
+{
+ return howto->type;
+}
+
+/* Code to turn a r_type into a howto ptr, uses the above howto table
+ */
+
+static void
+rtype2howto (internal, dst)
+ arelent *internal;
+ struct internal_reloc *dst;
+{
+ switch (dst->r_type)
+ {
+ case R_RELBYTE:
+ internal->howto = howto_table + 0;
+ break;
+ case R_RELWORD:
+ internal->howto = howto_table + 1;
+ break;
+ case R_RELLONG:
+ internal->howto = howto_table + 2;
+ break;
+ case R_PCRBYTE:
+ internal->howto = howto_table + 3;
+ break;
+ case R_PCRWORD:
+ internal->howto = howto_table + 4;
+ break;
+ case R_PCRLONG:
+ internal->howto = howto_table + 5;
+ break;
+ case R_MOVB1:
+ internal->howto = howto_table + 6;
+ break;
+ case R_MOVB2:
+ internal->howto = howto_table + 7;
+ break;
+ case R_JMP1:
+ internal->howto = howto_table + 8;
+ break;
+ case R_JMP2:
+ internal->howto = howto_table + 9;
+ break;
+ case R_JMPL1:
+ internal->howto = howto_table + 10;
+ break;
+ case R_JMPL_B8:
+ internal->howto = howto_table + 11;
+ break;
+ case R_MOVLB1:
+ internal->howto = howto_table + 12;
+ break;
+ case R_MOVLB2:
+ internal->howto = howto_table + 13;
+ break;
+ case R_MEM_INDIRECT:
+ internal->howto = howto_table + 14;
+ break;
+ default:
+ abort ();
+ break;
+ }
+}
+
+#define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry)
+
+
+/* Perform any necessaru magic to the addend in a reloc entry */
+
+
+#define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
+ cache_ptr->addend = ext_reloc.r_offset;
+
+
+#define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
+ reloc_processing(relent, reloc, symbols, abfd, section)
+
+static void
+reloc_processing (relent, reloc, symbols, abfd, section)
+ arelent * relent;
+ struct internal_reloc *reloc;
+ asymbol ** symbols;
+ bfd * abfd;
+ asection * section;
+{
+ relent->address = reloc->r_vaddr;
+ rtype2howto (relent, reloc);
+
+ if (((int) reloc->r_symndx) > 0)
+ {
+ relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
+ }
+ else
+ {
+ relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
+ }
+
+
+
+ relent->addend = reloc->r_offset;
+
+ relent->address -= section->vma;
+ /* relent->section = 0;*/
+}
+
+
+static int
+h8300_reloc16_estimate(abfd, input_section, reloc, shrink, link_info)
+ bfd *abfd;
+ asection *input_section;
+ arelent *reloc;
+ unsigned int shrink;
+ struct bfd_link_info *link_info;
+{
+ bfd_vma value;
+ bfd_vma dot;
+ bfd_vma gap;
+
+ /* The address of the thing to be relocated will have moved back by
+ the size of the shrink - but we don't change reloc->address here,
+ since we need it to know where the relocation lives in the source
+ uncooked section */
+
+ /* reloc->address -= shrink; conceptual */
+
+ bfd_vma address = reloc->address - shrink;
+
+
+ switch (reloc->howto->type)
+ {
+ case R_MOVB2:
+ case R_JMP2:
+ shrink+=2;
+ break;
+
+ /* Thing is a move one byte */
+ case R_MOVB1:
+ value = bfd_coff_reloc16_get_value(reloc, link_info, input_section);
+
+ if (value >= 0xff00)
+ {
+
+ /* Change the reloc type from 16bit, possible 8 to 8bit
+ possible 16 */
+ reloc->howto = reloc->howto + 1;
+ /* The place to relc moves back by one */
+ /* This will be two bytes smaller in the long run */
+ shrink +=2 ;
+ bfd_perform_slip(abfd, 2, input_section, address);
+ }
+
+ break;
+ /* This is the 24 bit branch which could become an 8 bitter,
+ the relocation points to the first byte of the insn, not the
+ actual data */
+
+ case R_JMPL1:
+ value = bfd_coff_reloc16_get_value(reloc, link_info, input_section);
+
+ dot = input_section->output_section->vma +
+ input_section->output_offset + address;
+
+ /* See if the address we're looking at within 127 bytes of where
+ we are, if so then we can use a small branch rather than the
+ jump we were going to */
+
+ gap = value - dot ;
+
+ if (-120 < (long)gap && (long)gap < 120 )
+ {
+
+ /* Change the reloc type from 24bit, possible 8 to 8bit
+ possible 32 */
+ reloc->howto = reloc->howto + 1;
+ /* This will be two bytes smaller in the long run */
+ shrink +=2 ;
+ bfd_perform_slip(abfd, 2, input_section, address);
+ }
+ break;
+
+ case R_JMP1:
+
+ value = bfd_coff_reloc16_get_value(reloc, link_info, input_section);
+
+ dot = input_section->output_section->vma +
+ input_section->output_offset + address;
+
+ /* See if the address we're looking at within 127 bytes of where
+ we are, if so then we can use a small branch rather than the
+ jump we were going to */
+
+ gap = value - (dot - shrink);
+
+
+ if (-120 < (long)gap && (long)gap < 120 )
+ {
+
+ /* Change the reloc type from 16bit, possible 8 to 8bit
+ possible 16 */
+ reloc->howto = reloc->howto + 1;
+ /* The place to relc moves back by one */
+
+ /* This will be two bytes smaller in the long run */
+ shrink +=2 ;
+ bfd_perform_slip(abfd, 2, input_section, address);
+ }
+ break;
+ }
+
+
+ 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_MEM_INDIRECT: /* Temporary */
+ 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;
+ default:
+
+ abort ();
+ break;
+
+ }
+ *src_ptr = src_address;
+ *dst_ptr = dst_address;
+
+}
+
+#define coff_reloc16_extra_cases h8300_reloc16_extra_cases
+#define coff_reloc16_estimate h8300_reloc16_estimate
+
+#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,
+};
generated by cgit v1.2.3 (git 2.25.1) at 2025-08-02 16:44:06 +0000