aboutsummaryrefslogtreecommitdiff
path: root/bfd/coff-z80.c
diff options
context:
space:
mode:
authorNick Clifton <nickc@redhat.com>2005-10-25 17:40:19 +0000
committerNick Clifton <nickc@redhat.com>2005-10-25 17:40:19 +0000
commit3c9b82baee30a1d3cfeb419643c6363dc9267208 (patch)
treee967c167366034d2a3bef0221e40d5abe7b999b6 /bfd/coff-z80.c
parentfcfa13d2b2b18f83382c2a0cb82c9c7d21be10cb (diff)
downloadgdb-3c9b82baee30a1d3cfeb419643c6363dc9267208.zip
gdb-3c9b82baee30a1d3cfeb419643c6363dc9267208.tar.gz
gdb-3c9b82baee30a1d3cfeb419643c6363dc9267208.tar.bz2
Add support for the Z80 processor family
Diffstat (limited to 'bfd/coff-z80.c')
-rw-r--r--bfd/coff-z80.c244
1 files changed, 244 insertions, 0 deletions
diff --git a/bfd/coff-z80.c b/bfd/coff-z80.c
new file mode 100644
index 0000000..fe401d7
--- /dev/null
+++ b/bfd/coff-z80.c
@@ -0,0 +1,244 @@
+/* BFD back-end for Zilog Z80 COFF binaries.
+ Copyright 2005 Free Software Foundation, Inc.
+ Contributed by Arnold Metselaar <arnold_m@operamail.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., 51 Franklin Street - Fifth Floor, Boston,
+ MA 02110-1301, USA. */
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "libbfd.h"
+#include "bfdlink.h"
+#include "coff/z80.h"
+#include "coff/internal.h"
+#include "libcoff.h"
+
+#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER 0
+
+static reloc_howto_type r_imm32 =
+HOWTO (R_IMM32, 0, 1, 32, FALSE, 0,
+ complain_overflow_dont, 0, "r_imm32", TRUE, 0xffffffff, 0xffffffff,
+ FALSE);
+
+static reloc_howto_type r_imm16 =
+HOWTO (R_IMM16, 0, 1, 16, FALSE, 0,
+ complain_overflow_dont, 0, "r_imm16", TRUE, 0x0000ffff, 0x0000ffff,
+ FALSE);
+
+static reloc_howto_type r_imm8 =
+HOWTO (R_IMM8, 0, 0, 8, FALSE, 0,
+ complain_overflow_bitfield, 0, "r_imm8", TRUE, 0x000000ff, 0x000000ff,
+ FALSE);
+
+static reloc_howto_type r_jr =
+HOWTO (R_JR, 0, 0, 8, TRUE, 0,
+ complain_overflow_signed, 0, "r_jr", FALSE, 0, 0xFF,
+ FALSE);
+
+static reloc_howto_type r_off8 =
+HOWTO (R_OFF8, 0, 0, 8, FALSE, 0,
+ complain_overflow_signed, 0,"r_off8", FALSE, 0, 0xff,
+ FALSE);
+
+
+#define BADMAG(x) Z80BADMAG(x)
+#define Z80 1 /* Customize coffcode.h. */
+#define __A_MAGIC_SET__
+
+/* Code to swap in the reloc. */
+
+#define SWAP_IN_RELOC_OFFSET H_GET_32
+#define SWAP_OUT_RELOC_OFFSET H_PUT_32
+
+#define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
+ dst->r_stuff[0] = 'S'; \
+ dst->r_stuff[1] = 'C';
+
+/* Code to turn a r_type into a howto ptr, uses the above howto table. */
+
+static void
+rtype2howto (arelent *internal, struct internal_reloc *dst)
+{
+ switch (dst->r_type)
+ {
+ default:
+ abort ();
+ break;
+ case R_IMM8:
+ internal->howto = &r_imm8;
+ break;
+ case R_IMM16:
+ internal->howto = &r_imm16;
+ break;
+ case R_IMM32:
+ internal->howto = &r_imm32;
+ break;
+ case R_JR:
+ internal->howto = &r_jr;
+ break;
+ case R_OFF8:
+ internal->howto = &r_off8;
+ break;
+ }
+}
+
+#define RTYPE2HOWTO(internal, relocentry) rtype2howto (internal, relocentry)
+
+static reloc_howto_type *
+coff_z80_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+ bfd_reloc_code_real_type code)
+{
+ switch (code)
+ {
+ case BFD_RELOC_8: return & r_imm8;
+ case BFD_RELOC_16: return & r_imm16;
+ case BFD_RELOC_32: return & r_imm32;
+ case BFD_RELOC_8_PCREL: return & r_jr;
+ case BFD_RELOC_Z80_DISP8: return & r_off8;
+ default: BFD_FAIL ();
+ return NULL;
+ }
+}
+
+/* Perform any necessary 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 (arelent *relent,
+ struct internal_reloc *reloc,
+ asymbol **symbols,
+ bfd *abfd,
+ asection *section)
+{
+ relent->address = reloc->r_vaddr;
+ rtype2howto (relent, reloc);
+
+ if (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;
+}
+
+static void
+extra_case (bfd *in_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)
+{
+ asection * input_section = link_order->u.indirect.section;
+ int val;
+
+ switch (reloc->howto->type)
+ {
+ case R_OFF8:
+ val = bfd_coff_reloc16_get_value (reloc, link_info,
+ input_section);
+ if (val>127 || val<-128) /* Test for overflow. */
+ {
+ if (! ((*link_info->callbacks->reloc_overflow)
+ (link_info, NULL,
+ bfd_asymbol_name (*reloc->sym_ptr_ptr),
+ reloc->howto->name, reloc->addend, input_section->owner,
+ input_section, reloc->address)))
+ abort ();
+ }
+ bfd_put_8 (in_abfd, val, data + *dst_ptr);
+ (*dst_ptr) += 1;
+ (*src_ptr) += 1;
+ break;
+
+ case R_IMM8:
+ val = bfd_get_16 ( in_abfd, data+*src_ptr)
+ + bfd_coff_reloc16_get_value (reloc, link_info, input_section);
+ bfd_put_8 (in_abfd, val, data + *dst_ptr);
+ (*dst_ptr) += 1;
+ (*src_ptr) += 1;
+ break;
+
+ case R_IMM16:
+ val = bfd_get_16 ( in_abfd, data+*src_ptr)
+ + bfd_coff_reloc16_get_value (reloc, link_info, input_section);
+ bfd_put_16 (in_abfd, val, data + *dst_ptr);
+ (*dst_ptr) += 2;
+ (*src_ptr) += 2;
+ break;
+
+ case R_IMM32:
+ val = bfd_get_32 ( in_abfd, data+*src_ptr)
+ + bfd_coff_reloc16_get_value (reloc, link_info, input_section);
+ bfd_put_32 (in_abfd, val, data + *dst_ptr);
+ (*dst_ptr) += 4;
+ (*src_ptr) += 4;
+ break;
+
+ case R_JR:
+ {
+ bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
+ input_section);
+ bfd_vma dot = (link_order->offset
+ + *dst_ptr
+ + input_section->output_section->vma);
+ int gap = dst - dot - 1; /* -1, Since the offset is relative
+ to the value of PC after reading
+ the offset. */
+
+ if (gap >= 128 || gap < -128)
+ {
+ if (! ((*link_info->callbacks->reloc_overflow)
+ (link_info, NULL,
+ bfd_asymbol_name (*reloc->sym_ptr_ptr),
+ reloc->howto->name, reloc->addend, input_section->owner,
+ input_section, reloc->address)))
+ abort ();
+ }
+ bfd_put_8 (in_abfd, gap, data + *dst_ptr);
+ (*dst_ptr)++;
+ (*src_ptr)++;
+ break;
+ }
+
+ default:
+ abort ();
+ }
+}
+
+#define coff_reloc16_extra_cases extra_case
+#define coff_bfd_reloc_type_lookup coff_z80_reloc_type_lookup
+
+#include "coffcode.h"
+
+#undef coff_bfd_get_relocated_section_contents
+#define coff_bfd_get_relocated_section_contents \
+ bfd_coff_reloc16_get_relocated_section_contents
+
+#undef coff_bfd_relax_section
+#define coff_bfd_relax_section bfd_coff_reloc16_relax_section
+
+CREATE_LITTLE_COFF_TARGET_VEC (z80coff_vec, "coff-z80", 0, 0, '\0', NULL,
+ COFF_SWAP_TABLE)
+