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- /* BFD back-end for Intel 960 COFF files.
- Copyright (C) 1990, 91, 92, 93, 94, 1995 Free Software Foundation, Inc.
- Written by Cygnus Support.
-
- 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #define I960 1
- #define BADMAG(x) I960BADMAG(x)
-
- #include "bfd.h"
- #include "sysdep.h"
- #include "libbfd.h"
- #include "obstack.h"
- #include "coff/i960.h"
- #include "coff/internal.h"
- #include "libcoff.h" /* to allow easier abstraction-breaking */
-
- static bfd_reloc_status_type optcall_callback
- PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
- static bfd_reloc_status_type coff_i960_relocate
- PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
-
- #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (3)
-
- #define COFF_LONG_FILENAMES
-
- #define CALLS 0x66003800 /* Template for 'calls' instruction */
- #define BAL 0x0b000000 /* Template for 'bal' instruction */
- #define BAL_MASK 0x00ffffff
-
- static bfd_reloc_status_type
- optcall_callback (abfd, reloc_entry, symbol_in, data,
- ignore_input_section, ignore_bfd, error_message)
- bfd *abfd;
- arelent *reloc_entry;
- asymbol *symbol_in;
- PTR data;
- asection *ignore_input_section;
- bfd *ignore_bfd;
- char **error_message;
- {
- /* This item has already been relocated correctly, but we may be
- * able to patch in yet better code - done by digging out the
- * correct info on this symbol */
- bfd_reloc_status_type result;
- coff_symbol_type *cs = coffsymbol(symbol_in);
-
- /* So the target symbol has to be of coff type, and the symbol
- has to have the correct native information within it */
- if ((bfd_asymbol_flavour(&cs->symbol) != bfd_target_coff_flavour)
- || (cs->native == (combined_entry_type *)NULL))
- {
- /* This is interesting, consider the case where we're outputting coff
- from a mix n match input, linking from coff to a symbol defined in a
- bout file will cause this match to be true. Should I complain? This
- will only work if the bout symbol is non leaf. */
- *error_message =
- (char *) "uncertain calling convention for non-COFF symbol";
- result = bfd_reloc_dangerous;
- }
- else
- {
- switch (cs->native->u.syment.n_sclass)
- {
- case C_LEAFSTAT:
- case C_LEAFEXT:
- /* This is a call to a leaf procedure, replace instruction with a bal
- to the correct location. */
- {
- union internal_auxent *aux = &((cs->native+2)->u.auxent);
- int word = bfd_get_32(abfd, (bfd_byte *)data + reloc_entry->address);
- int olf = (aux->x_bal.x_balntry - cs->native->u.syment.n_value);
- BFD_ASSERT(cs->native->u.syment.n_numaux==2);
-
- /* We replace the original call instruction with a bal to
- the bal entry point - the offset of which is described in
- the 2nd auxent of the original symbol. We keep the native
- sym and auxents untouched, so the delta between the two
- is the offset of the bal entry point. */
- word = ((word + olf) & BAL_MASK) | BAL;
- bfd_put_32(abfd, word, (bfd_byte *) data + reloc_entry->address);
- }
- result = bfd_reloc_ok;
- break;
- case C_SCALL:
- /* This is a call to a system call, replace with a calls to # */
- BFD_ASSERT(0);
- result = bfd_reloc_ok;
- break;
- default:
- result = bfd_reloc_ok;
- break;
- }
- }
- return result;
- }
-
- /* i960 COFF is used by VxWorks 5.1. However, VxWorks 5.1 does not
- appear to correctly handle a reloc against a symbol defined in the
- same object file. It appears to simply discard such relocs, rather
- than adding their values into the object file. We handle this here
- by converting all relocs against defined symbols into relocs
- against the section symbol, when generating a relocateable output
- file. */
-
- static bfd_reloc_status_type
- coff_i960_relocate (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;
- {
- const char *sec_name;
- asymbol **syms, **sym_end;
-
- if (output_bfd == NULL)
- {
- /* Not generating relocateable output file. */
- return bfd_reloc_continue;
- }
-
- if (bfd_is_und_section (bfd_get_section (symbol)))
- {
- /* Symbol is not defined, so no need to worry about it. */
- return bfd_reloc_continue;
- }
-
- if (bfd_is_com_section (bfd_get_section (symbol)))
- {
- /* I don't really know what the right action is for a common
- symbol. */
- return bfd_reloc_continue;
- }
-
- /* Convert the reloc to use the section symbol. FIXME: This method
- is ridiculous. */
- sec_name = bfd_get_section_name (output_bfd,
- bfd_get_section (symbol)->output_section);
- syms = bfd_get_outsymbols (output_bfd);
- sym_end = syms + bfd_get_symcount (output_bfd);
- for (; syms < sym_end; syms++)
- {
- if (bfd_asymbol_name (*syms) != NULL
- && strcmp (bfd_asymbol_name (*syms), sec_name) == 0
- && (*syms)->value == 0)
- {
- reloc_entry->sym_ptr_ptr = syms;
- break;
- }
- }
-
- if (syms >= sym_end)
- abort ();
-
- /* Let bfd_perform_relocation do its thing, which will include
- stuffing the symbol addend into the object file. */
- return bfd_reloc_continue;
- }
-
- static reloc_howto_type howto_rellong =
- HOWTO ((unsigned int) R_RELLONG, 0, 2, 32,false, 0,
- complain_overflow_bitfield, coff_i960_relocate,"rellong", true,
- 0xffffffff, 0xffffffff, 0);
- static reloc_howto_type howto_iprmed =
- HOWTO (R_IPRMED, 0, 2, 24,true,0, complain_overflow_signed,
- coff_i960_relocate, "iprmed ", true, 0x00ffffff, 0x00ffffff, 0);
- static reloc_howto_type howto_optcall =
- HOWTO (R_OPTCALL, 0,2,24,true,0, complain_overflow_signed,
- optcall_callback, "optcall", true, 0x00ffffff, 0x00ffffff, 0);
-
- static reloc_howto_type *
- coff_i960_reloc_type_lookup (abfd, code)
- bfd *abfd;
- bfd_reloc_code_real_type code;
- {
- switch (code)
- {
- default:
- return 0;
- case BFD_RELOC_I960_CALLJ:
- return &howto_optcall;
- case BFD_RELOC_32:
- case BFD_RELOC_CTOR:
- return &howto_rellong;
- case BFD_RELOC_24_PCREL:
- return &howto_iprmed;
- }
- }
-
- /* The real code is in coffcode.h */
-
- #define RTYPE2HOWTO(cache_ptr, dst) \
- { \
- reloc_howto_type *howto_ptr; \
- switch ((dst)->r_type) { \
- case 17: howto_ptr = &howto_rellong; break; \
- case 25: howto_ptr = &howto_iprmed; break; \
- case 27: howto_ptr = &howto_optcall; break; \
- default: howto_ptr = 0; break; \
- } \
- (cache_ptr)->howto = howto_ptr; \
- }
-
- #include "coffcode.h"
-
- #undef coff_bfd_reloc_type_lookup
- #define coff_bfd_reloc_type_lookup coff_i960_reloc_type_lookup
-
- const bfd_target icoff_little_vec =
- {
- "coff-Intel-little", /* name */
- bfd_target_coff_flavour,
- false, /* data byte order is little */
- false, /* header byte order is little */
-
- (HAS_RELOC | EXEC_P | /* object flags */
- HAS_LINENO | HAS_DEBUG |
- HAS_SYMS | HAS_LOCALS | WP_TEXT),
-
- (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
- '_', /* leading underscore */
- '/', /* ar_pad_char */
- 15, /* ar_max_namelen */
-
- 3, /* minimum alignment power */
- bfd_getl64, bfd_getl_signed_64, bfd_putl64,
- bfd_getl32, bfd_getl_signed_32, bfd_putl32,
- bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
- bfd_getl64, bfd_getl_signed_64, bfd_putl64,
- bfd_getl32, bfd_getl_signed_32, bfd_putl32,
- bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
-
- {_bfd_dummy_target, coff_object_p, /* bfd_check_format */
- bfd_generic_archive_p, _bfd_dummy_target},
- {bfd_false, coff_mkobject, /* bfd_set_format */
- _bfd_generic_mkarchive, 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,
- };
-
-
- const bfd_target icoff_big_vec =
- {
- "coff-Intel-big", /* name */
- bfd_target_coff_flavour,
- false, /* data byte order is little */
- true, /* header byte order is big */
-
- (HAS_RELOC | EXEC_P | /* object flags */
- HAS_LINENO | HAS_DEBUG |
- HAS_SYMS | HAS_LOCALS | WP_TEXT),
-
- (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
- '_', /* leading underscore */
- '/', /* ar_pad_char */
- 15, /* ar_max_namelen */
-
- 3, /* minimum alignment power */
- bfd_getl64, bfd_getl_signed_64, bfd_putl64,
- bfd_getl32, bfd_getl_signed_32, bfd_putl32,
- bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* 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_set_format */
- _bfd_generic_mkarchive, 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,
- };
-