home *** CD-ROM | disk | FTP | other *** search
- /* coff object file format with bfd
- Copyright (C) 1989, 1990, 1991 Free Software Foundation, Inc.
-
- This file is part of GAS.
-
- GAS 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, or (at your option)
- any later version.
-
- GAS 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 GAS; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /*
-
- How does this releate to the rest of GAS ?
-
- Well, all the other files in gas are more or less a black box. It
- takes care of opening files, parsing command lines, stripping blanks
- etc etc. This module gets a chance to register what it wants to do by
- saying that it is interested in various pseduo ops. The other big
- change is write_object_file. This runs through all the data
- structures that gas builds, and outputs the file in the format of our
- choice.
-
- Hacked for BFDness by steve chamberlain
-
- This object module now supports the Hitachi H8/{3|5}00 and the AMD 29k
-
- sac@cygnus.com
- */
-
- #include "as.h"
- #include "obstack.h"
- #include "subsegs.h"
- #include "frags.h"
- #include "../bfd/libbfd.h"
- #include "../bfd/libcoff.h"
-
- /* The NOP_OPCODE is for the alignment fill value. Fill with nop so
- that we can stick sections together without causing trouble. */
- #ifndef NOP_OPCODE
- #define NOP_OPCODE 0x00
- #endif
-
- #define MIN(a,b) ((a) < (b)? (a) : (b))
- /* This vector is used to turn an internal segment into a section #
- suitable for insertion into a coff symbol table
- */
-
- const short seg_N_TYPE[] =
- { /* in: segT out: N_TYPE bits */
- C_ABS_SECTION,
- 1,
- 2,
- 3,
- 4,
- 5,
- 6,
- 7,
- 8,
- 9,
- 10,
- C_UNDEF_SECTION, /* SEG_UNKNOWN */
- C_UNDEF_SECTION, /* SEG_ABSENT */
- C_UNDEF_SECTION, /* SEG_PASS1 */
- C_UNDEF_SECTION, /* SEG_GOOF */
- C_UNDEF_SECTION, /* SEG_BIG */
- C_UNDEF_SECTION, /* SEG_DIFFERENCE */
- C_DEBUG_SECTION, /* SEG_DEBUG */
- C_NTV_SECTION, /* SEG_NTV */
- C_PTV_SECTION, /* SEG_PTV */
- C_REGISTER_SECTION, /* SEG_REGISTER */
- };
-
-
- int function_lineoff = -1; /* Offset in line#s where the last function
- started (the odd entry for line #0) */
-
-
- static symbolS *last_line_symbol;
-
- /* Add 4 to the real value to get the index and compensate the
- negatives. This vector is used by S_GET_SEGMENT to turn a coff
- section number into a segment number
- */
- static symbolS *previous_file_symbol = NULL;
- void c_symbol_merge ();
- static int line_base;
-
- symbolS *c_section_symbol ();
- bfd *abfd;
- void EXFUN (bfd_as_write_hook, (struct internal_filehdr *,
- bfd * abfd));
-
- static void EXFUN (fixup_segment, (segment_info_type *segP,
- segT this_segment_type));
-
-
- static void EXFUN (fixup_mdeps, (fragS *,
- object_headers *,
- segT));
-
-
- static void EXFUN (fill_section, (bfd * abfd,
- object_headers *,
- unsigned long *));
-
-
- char *EXFUN (s_get_name, (symbolS * s));
- static symbolS *EXFUN (tag_find_or_make, (char *name));
- static symbolS *EXFUN (tag_find, (char *name));
-
-
- static int
- EXFUN (c_line_new, (
- symbolS * symbol,
- long paddr,
- unsigned short line_number,
- fragS * frag));
-
-
- static void EXFUN (w_symbols,
- (bfd * abfd,
- char *where,
- symbolS * symbol_rootP));
-
-
-
- static void EXFUN (obj_coff_def, (int what));
- static void EXFUN (obj_coff_lcomm, (void));
- static void EXFUN (obj_coff_dim, (void));
- static void EXFUN (obj_coff_text, (void));
- static void EXFUN (obj_coff_data, (void));
- static void EXFUN( obj_coff_bss,(void));
- static void EXFUN( obj_coff_ident,(void));
- static void EXFUN (obj_coff_endef, (void));
- static void EXFUN (obj_coff_line, (void));
- static void EXFUN (obj_coff_ln, (void));
- static void EXFUN (obj_coff_scl, (void));
- static void EXFUN (obj_coff_size, (void));
- static void EXFUN (obj_coff_tag, (void));
- static void EXFUN (obj_coff_type, (void));
- static void EXFUN (obj_coff_val, (void));
- void EXFUN (obj_coff_section, (void));
- static void EXFUN (tag_init, (void));
- static void EXFUN (tag_insert, (char *name, symbolS * symbolP));
-
-
- static struct hash_control *tag_hash;
- static symbolS *def_symbol_in_progress = NULL;
-
- const pseudo_typeS obj_pseudo_table[] =
- {
- {"def", obj_coff_def, 0},
- {"dim", obj_coff_dim, 0},
- {"endef", obj_coff_endef, 0},
- {"line", obj_coff_line, 0},
- {"ln", obj_coff_ln, 0},
- {"scl", obj_coff_scl, 0},
- {"size", obj_coff_size, 0},
- {"tag", obj_coff_tag, 0},
- {"type", obj_coff_type, 0},
- {"val", obj_coff_val, 0},
- {"section", obj_coff_section, 0},
- {"use", obj_coff_section, 0},
- {"sect", obj_coff_section, 0},
- {"text", obj_coff_text, 0},
- {"data", obj_coff_data, 0},
- {"bss", obj_coff_bss, 0},
- {"ident", obj_coff_ident, 0},
- {"ABORT", s_abort, 0},
- {"lcomm", obj_coff_lcomm, 0},
- {NULL} /* end sentinel */
- }; /* obj_pseudo_table */
-
-
-
- /* Section stuff
-
- We allow more than just the standard 3 sections, infact, we allow
- 10 sections, (though the usual three have to be there).
-
- This structure performs the mappings for us:
-
- */
-
- /* OBS stuff
- static struct internal_scnhdr bss_section_header;
- struct internal_scnhdr data_section_header;
- struct internal_scnhdr text_section_header;
-
- const segT N_TYPE_seg [32] =
- {
-
- };
-
- */
-
- #define N_SEG 32
- typedef struct
- {
- segT seg_t;
- int i;
- } seg_info_type;
-
- seg_info_type seg_info_off_by_4[N_SEG] =
- {
- {SEG_PTV, },
- {SEG_NTV, },
- {SEG_DEBUG, },
- {SEG_ABSOLUTE, },
- {SEG_UNKNOWN, },
- {SEG_E0},
- {SEG_E1},
- {SEG_E2},
- {SEG_E3},
- {SEG_E4},
- {SEG_E5},
- {SEG_E6},
- {SEG_E7},
- {SEG_E8},
- {SEG_E9},
- {(segT)15},
- {(segT)16},
- {(segT)17},
- {(segT)18},
- {(segT)19},
- {(segT)20},
- {(segT)0},
- {(segT)0},
- {(segT)0},
- {SEG_REGISTER}
- };
-
-
-
- #define SEG_INFO_FROM_SECTION_NUMBER(x) (seg_info_off_by_4[(x)+4])
- #define SEG_INFO_FROM_SEG_NUMBER(x) (seg_info_off_by_4[(x)])
-
-
- relax_addressT
- DEFUN (relax_align, (address, alignment),
- register relax_addressT address AND
- register long alignment)
- {
- relax_addressT mask;
- relax_addressT new_address;
-
- mask = ~((~0) << alignment);
- new_address = (address + mask) & (~mask);
- return (new_address - address);
- } /* relax_align() */
-
-
- segT
- DEFUN (s_get_segment, (x),
- symbolS * x)
- {
- return SEG_INFO_FROM_SECTION_NUMBER (x->sy_symbol.ost_entry.n_scnum).seg_t;
- }
-
-
-
- /* calculate the size of the frag chain and fill in the section header
- to contain all of it, also fill in the addr of the sections */
- static unsigned int
- DEFUN (size_section, (abfd, idx),
- bfd * abfd AND
- unsigned int idx)
- {
-
- unsigned int size = 0;
- fragS *frag = segment_info[idx].frchainP->frch_root;
- while (frag)
- {
- size = frag->fr_address;
- if (frag->fr_address != size)
- {
- printf ("Out of step\n");
- size = frag->fr_address;
- }
-
- switch (frag->fr_type)
- {
- #ifdef TC_COFF_SIZEMACHDEP
- case rs_machine_dependent:
- size += TC_COFF_SIZEMACHDEP (frag);
- break;
- #endif
- case rs_fill:
- case rs_org:
- size += frag->fr_fix;
- size += frag->fr_offset * frag->fr_var;
- break;
- case rs_align:
- size += frag->fr_fix;
- size += relax_align (size, frag->fr_offset);
- }
- frag = frag->fr_next;
- }
- segment_info[idx].scnhdr.s_size = size;
- return size;
- }
-
-
- static unsigned int
- DEFUN (count_entries_in_chain, (idx),
- unsigned int idx)
- {
- unsigned int nrelocs;
- fixS *fixup_ptr;
-
- /* Count the relocations */
- fixup_ptr = segment_info[idx].fix_root;
- nrelocs = 0;
- while (fixup_ptr != (fixS *) NULL)
- {
- if (TC_COUNT_RELOC (fixup_ptr))
- {
-
- #ifdef TC_A29K
-
- if (fixup_ptr->fx_r_type == RELOC_CONSTH)
- nrelocs += 2;
- else
- nrelocs++;
- #else
- nrelocs++;
- #endif
- }
-
- fixup_ptr = fixup_ptr->fx_next;
- }
- return nrelocs;
- }
-
- /* output all the relocations for a section */
- void
- DEFUN (do_relocs_for, (abfd, h, file_cursor),
- bfd * abfd AND
- object_headers * h AND
- unsigned long *file_cursor)
- {
- unsigned int nrelocs;
- unsigned int idx;
- unsigned long reloc_start = *file_cursor;
-
- for (idx = SEG_E0; idx < SEG_E9; idx++)
- {
- if (segment_info[idx].scnhdr.s_name[0])
- {
- struct external_reloc *ext_ptr;
- struct external_reloc *external_reloc_vec;
- unsigned int external_reloc_size;
- unsigned int base = segment_info[idx].scnhdr.s_paddr;
- fixS *fix_ptr = segment_info[idx].fix_root;
- nrelocs = count_entries_in_chain (idx);
-
- if (nrelocs)
- /* Bypass this stuff if no relocs. This also incidentally
- avoids a SCO bug, where free(malloc(0)) tends to crash. */
- {
- external_reloc_size = nrelocs * RELSZ;
- external_reloc_vec =
- (struct external_reloc *) malloc (external_reloc_size);
-
- ext_ptr = external_reloc_vec;
-
- /* Fill in the internal coff style reloc struct from the
- internal fix list. */
- while (fix_ptr)
- {
- symbolS *symbol_ptr;
- struct internal_reloc intr;
-
- /* Only output some of the relocations */
- if (TC_COUNT_RELOC (fix_ptr))
- {
- #ifdef TC_RELOC_MANGLE
- TC_RELOC_MANGLE (fix_ptr, &intr, base);
-
- #else
- symbolS *dot;
- symbol_ptr = fix_ptr->fx_addsy;
-
- intr.r_type = TC_COFF_FIX2RTYPE (fix_ptr);
- intr.r_vaddr =
- base + fix_ptr->fx_frag->fr_address + fix_ptr->fx_where;
-
- intr.r_offset = fix_ptr->fx_offset;
-
- intr.r_offset = 0;
-
- /* Turn the segment of the symbol into an offset. */
- if (symbol_ptr)
- {
- dot = segment_info[S_GET_SEGMENT (symbol_ptr)].dot;
- if (dot)
- {
- intr.r_symndx = dot->sy_number;
- }
- else
- {
- intr.r_symndx = symbol_ptr->sy_number;
- }
-
- }
- else
- {
- intr.r_symndx = -1;
- }
- #endif
-
- (void) bfd_coff_swap_reloc_out (abfd, &intr, ext_ptr);
- ext_ptr++;
-
- #if defined(TC_A29K)
-
- /* The 29k has a special kludge for the high 16 bit
- reloc. Two relocations are emited, R_IHIHALF,
- and R_IHCONST. The second one doesn't contain a
- symbol, but uses the value for offset. */
-
- if (intr.r_type == R_IHIHALF)
- {
- /* now emit the second bit */
- intr.r_type = R_IHCONST;
- intr.r_symndx = fix_ptr->fx_addnumber;
- (void) bfd_coff_swap_reloc_out (abfd, &intr, ext_ptr);
- ext_ptr++;
- }
- #endif
- }
-
- fix_ptr = fix_ptr->fx_next;
- }
-
- /* Write out the reloc table */
- bfd_write ((PTR) external_reloc_vec, 1, external_reloc_size,
- abfd);
- free (external_reloc_vec);
-
- /* Fill in section header info. */
- segment_info[idx].scnhdr.s_relptr = *file_cursor;
- *file_cursor += external_reloc_size;
- segment_info[idx].scnhdr.s_nreloc = nrelocs;
- }
- else
- {
- /* No relocs */
- segment_info[idx].scnhdr.s_relptr = 0;
- }
- }
- }
- /* Set relocation_size field in file headers */
- H_SET_RELOCATION_SIZE (h, *file_cursor - reloc_start, 0);
- }
-
-
- /* run through a frag chain and write out the data to go with it, fill
- in the scnhdrs with the info on the file postions
- */
- static void
- DEFUN (fill_section, (abfd, h, file_cursor),
- bfd * abfd AND
- object_headers *h AND
- unsigned long *file_cursor)
- {
-
- unsigned int i;
- unsigned int paddr = 0;
-
- for (i = SEG_E0; i < SEG_UNKNOWN; i++)
- {
- unsigned int offset = 0;
-
- struct internal_scnhdr *s = &(segment_info[i].scnhdr);
-
- if (s->s_name[0])
- {
- fragS *frag = segment_info[i].frchainP->frch_root;
- char *buffer;
-
- if (s->s_size == 0)
- s->s_scnptr = 0;
- else
- {
- buffer = xmalloc (s->s_size);
- s->s_scnptr = *file_cursor;
- }
- know (s->s_paddr == paddr);
-
- if (strcmp (s->s_name, ".text") == 0)
- s->s_flags |= STYP_TEXT;
- else if (strcmp (s->s_name, ".data") == 0)
- s->s_flags |= STYP_DATA;
- else if (strcmp (s->s_name, ".bss") == 0)
- {
- s->s_scnptr = 0;
- s->s_flags |= STYP_BSS;
- #ifndef TC_I386
- #ifndef TC_A29K
- /* Apparently the SVR3 linker is confused by noload
- sections. So is the UDI mondfe program. */
- s->s_flags |= STYP_NOLOAD;
- #endif
- #endif
- }
- else if (strcmp (s->s_name, ".lit") == 0)
- s->s_flags = STYP_LIT | STYP_TEXT;
- else if (strcmp (s->s_name, ".init") == 0)
- s->s_flags |= STYP_TEXT;
- else if (strcmp (s->s_name, ".fini") == 0)
- s->s_flags |= STYP_TEXT;
- else if (strncmp (s->s_name, ".comment", 8) == 0)
- s->s_flags |= STYP_INFO;
-
- while (frag)
- {
- unsigned int fill_size;
- switch (frag->fr_type)
- {
- case rs_machine_dependent:
- if (frag->fr_fix)
- {
- memcpy (buffer + frag->fr_address,
- frag->fr_literal,
- frag->fr_fix);
- offset += frag->fr_fix;
- }
-
- break;
- case rs_fill:
- case rs_align:
- case rs_org:
- if (frag->fr_fix)
- {
- memcpy (buffer + frag->fr_address,
- frag->fr_literal,
- frag->fr_fix);
- offset += frag->fr_fix;
- }
-
- fill_size = frag->fr_var;
- if (fill_size)
- {
- unsigned int count;
- unsigned int off = frag->fr_fix;
- for (count = frag->fr_offset; count; count--)
- {
- if (fill_size < s->s_size)
- {
- memcpy (buffer + frag->fr_address + off,
- frag->fr_literal + frag->fr_fix,
- fill_size);
- off += fill_size;
- offset += fill_size;
- }
- }
- }
- break;
- case rs_broken_word:
- break;
- default:
- abort ();
- }
- frag = frag->fr_next;
- }
-
- if (s->s_size != 0)
- {
- if (s->s_scnptr != 0)
- {
- bfd_write (buffer, s->s_size, 1, abfd);
- *file_cursor += s->s_size;
- }
- free (buffer);
- }
- paddr += s->s_size;
- }
- }
- }
-
- /* Coff file generation & utilities */
-
- static void
- DEFUN (coff_header_append, (abfd, h),
- bfd * abfd AND
- object_headers * h)
- {
- unsigned int i;
- char buffer[1000];
- char buffero[1000];
-
- bfd_seek (abfd, 0, 0);
-
- #ifndef OBJ_COFF_OMIT_OPTIONAL_HEADER
- H_SET_MAGIC_NUMBER (h, COFF_MAGIC);
- H_SET_VERSION_STAMP (h, 0);
- H_SET_ENTRY_POINT (h, 0);
- H_SET_TEXT_START (h, segment_info[SEG_E0].frchainP->frch_root->fr_address);
- H_SET_DATA_START (h, segment_info[SEG_E1].frchainP->frch_root->fr_address);
- H_SET_SIZEOF_OPTIONAL_HEADER (h, bfd_coff_swap_aouthdr_out(abfd, &h->aouthdr,
- buffero));
- #else /* defined (OBJ_COFF_OMIT_OPTIONAL_HEADER) */
- H_SET_SIZEOF_OPTIONAL_HEADER (h, 0);
- #endif /* defined (OBJ_COFF_OMIT_OPTIONAL_HEADER) */
-
- i = bfd_coff_swap_filehdr_out (abfd, &h->filehdr, buffer);
-
- bfd_write (buffer, i, 1, abfd);
- bfd_write (buffero, H_GET_SIZEOF_OPTIONAL_HEADER (h), 1, abfd);
-
- for (i = SEG_E0; i < SEG_E9; i++)
- {
- if (segment_info[i].scnhdr.s_name[0])
- {
- unsigned int size =
- bfd_coff_swap_scnhdr_out (abfd,
- &(segment_info[i].scnhdr),
- buffer);
- bfd_write (buffer, size, 1, abfd);
- }
- }
- }
-
-
- char *
- DEFUN (symbol_to_chars, (abfd, where, symbolP),
- bfd * abfd AND
- char *where AND
- symbolS * symbolP)
- {
- unsigned int numaux = symbolP->sy_symbol.ost_entry.n_numaux;
- unsigned int i;
-
- /* Turn any symbols with register attributes into abs symbols */
- if (S_GET_SEGMENT (symbolP) == SEG_REGISTER)
- {
- S_SET_SEGMENT (symbolP, SEG_ABSOLUTE);
- }
- /* At the same time, relocate all symbols to their output value */
-
- S_SET_VALUE (symbolP,
- segment_info[S_GET_SEGMENT (symbolP)].scnhdr.s_paddr
- + S_GET_VALUE (symbolP));
-
- where += bfd_coff_swap_sym_out (abfd, &symbolP->sy_symbol.ost_entry,
- where);
-
- for (i = 0; i < numaux; i++)
- {
- where += bfd_coff_swap_aux_out (abfd,
- &symbolP->sy_symbol.ost_auxent[i],
- S_GET_DATA_TYPE (symbolP),
- S_GET_STORAGE_CLASS (symbolP),
- where);
- }
- return where;
-
- }
-
-
- void
- obj_symbol_new_hook (symbolP)
- symbolS *symbolP;
- {
- char underscore = 0; /* Symbol has leading _ */
-
- /* Effective symbol */
- /* Store the pointer in the offset. */
- S_SET_ZEROES (symbolP, 0L);
- S_SET_DATA_TYPE (symbolP, T_NULL);
- S_SET_STORAGE_CLASS (symbolP, 0);
- S_SET_NUMBER_AUXILIARY (symbolP, 0);
- /* Additional information */
- symbolP->sy_symbol.ost_flags = 0;
- /* Auxiliary entries */
- bzero ((char *) &symbolP->sy_symbol.ost_auxent[0], AUXESZ);
-
- #ifdef STRIP_UNDERSCORE
- /* Remove leading underscore at the beginning of the symbol.
- * This is to be compatible with the standard librairies.
- */
- if (*S_GET_NAME (symbolP) == '_')
- {
- underscore = 1;
- S_SET_NAME (symbolP, S_GET_NAME (symbolP) + 1);
- } /* strip underscore */
- #endif /* STRIP_UNDERSCORE */
-
- if (S_IS_STRING (symbolP))
- SF_SET_STRING (symbolP);
- if (!underscore && S_IS_LOCAL (symbolP))
- SF_SET_LOCAL (symbolP);
-
- return;
- } /* obj_symbol_new_hook() */
-
- /* stack stuff */
- stack *
- stack_init (chunk_size, element_size)
- unsigned long chunk_size;
- unsigned long element_size;
- {
- stack *st;
-
- if ((st = (stack *) malloc (sizeof (stack))) == (stack *) 0)
- return (stack *) 0;
- if ((st->data = malloc (chunk_size)) == (char *) 0)
- {
- free (st);
- return (stack *) 0;
- }
- st->pointer = 0;
- st->size = chunk_size;
- st->chunk_size = chunk_size;
- st->element_size = element_size;
- return st;
- } /* stack_init() */
-
- void
- stack_delete (st)
- stack *st;
- {
- free (st->data);
- free (st);
- }
-
- char *
- stack_push (st, element)
- stack *st;
- char *element;
- {
- if (st->pointer + st->element_size >= st->size)
- {
- st->size += st->chunk_size;
- if ((st->data = xrealloc (st->data, st->size)) == (char *) 0)
- return (char *) 0;
- }
- memcpy (st->data + st->pointer, element, st->element_size);
- st->pointer += st->element_size;
- return st->data + st->pointer;
- } /* stack_push() */
-
- char *
- stack_pop (st)
- stack *st;
- {
- if ((st->pointer -= st->element_size) < 0)
- {
- st->pointer = 0;
- return (char *) 0;
- }
-
- return st->data + st->pointer;
- }
-
- char *
- stack_top (st)
- stack *st;
- {
- return st->data + st->pointer - st->element_size;
- }
-
-
- /*
- * Handle .ln directives.
- */
-
- static void
- obj_coff_ln ()
- {
- int l;
-
- if (def_symbol_in_progress != NULL)
- {
- as_warn (".ln pseudo-op inside .def/.endef: ignored.");
- demand_empty_rest_of_line ();
- return;
- } /* wrong context */
-
- c_line_new (0,
- obstack_next_free (&frags) - frag_now->fr_literal,
- l = get_absolute_expression (),
- frag_now);
- #ifndef NO_LISTING
- {
- extern int listing;
-
- if (listing)
- {
- listing_source_line (l + line_base - 1);
- }
-
- }
- #endif
- demand_empty_rest_of_line ();
- return;
- } /* obj_coff_line() */
-
- /*
- * def()
- *
- * Handle .def directives.
- *
- * One might ask : why can't we symbol_new if the symbol does not
- * already exist and fill it with debug information. Because of
- * the C_EFCN special symbol. It would clobber the value of the
- * function symbol before we have a chance to notice that it is
- * a C_EFCN. And a second reason is that the code is more clear this
- * way. (at least I think it is :-).
- *
- */
-
- #define SKIP_SEMI_COLON() while (*input_line_pointer++ != ';')
- #define SKIP_WHITESPACES() while (*input_line_pointer == ' ' || \
- *input_line_pointer == '\t') \
- input_line_pointer++;
-
- static void
- DEFUN (obj_coff_def, (what),
- int what)
- {
- char name_end; /* Char after the end of name */
- char *symbol_name; /* Name of the debug symbol */
- char *symbol_name_copy; /* Temporary copy of the name */
- unsigned int symbol_name_length;
- /*$char* directiveP;$ *//* Name of the pseudo opcode */
- /*$char directive[MAX_DIRECTIVE];$ *//* Backup of the directive */
- /*$char end = 0;$ *//* If 1, stop parsing */
-
- if (def_symbol_in_progress != NULL)
- {
- as_warn (".def pseudo-op used inside of .def/.endef: ignored.");
- demand_empty_rest_of_line ();
- return;
- } /* if not inside .def/.endef */
-
- SKIP_WHITESPACES ();
-
- def_symbol_in_progress = (symbolS *) obstack_alloc (¬es, sizeof (*def_symbol_in_progress));
- bzero (def_symbol_in_progress, sizeof (*def_symbol_in_progress));
-
- symbol_name = input_line_pointer;
- name_end = get_symbol_end ();
- symbol_name_length = strlen (symbol_name);
- symbol_name_copy = xmalloc (symbol_name_length + 1);
- strcpy (symbol_name_copy, symbol_name);
-
- /* Initialize the new symbol */
- #ifdef STRIP_UNDERSCORE
- S_SET_NAME (def_symbol_in_progress, (*symbol_name_copy == '_'
- ? symbol_name_copy + 1
- : symbol_name_copy));
- #else /* STRIP_UNDERSCORE */
- S_SET_NAME (def_symbol_in_progress, symbol_name_copy);
- #endif /* STRIP_UNDERSCORE */
- /* free(symbol_name_copy); */
- def_symbol_in_progress->sy_name_offset = ~0;
- def_symbol_in_progress->sy_number = ~0;
- def_symbol_in_progress->sy_frag = &zero_address_frag;
-
- if (S_IS_STRING (def_symbol_in_progress))
- {
- SF_SET_STRING (def_symbol_in_progress);
- } /* "long" name */
-
- *input_line_pointer = name_end;
-
- demand_empty_rest_of_line ();
- return;
- } /* obj_coff_def() */
-
- unsigned int dim_index;
- static void
- DEFUN_VOID (obj_coff_endef)
- {
- symbolS *symbolP = 0;
- /* DIM BUG FIX sac@cygnus.com */
- dim_index = 0;
- if (def_symbol_in_progress == NULL)
- {
- as_warn (".endef pseudo-op used outside of .def/.endef: ignored.");
- demand_empty_rest_of_line ();
- return;
- } /* if not inside .def/.endef */
-
- /* Set the section number according to storage class. */
- switch (S_GET_STORAGE_CLASS (def_symbol_in_progress))
- {
- case C_STRTAG:
- case C_ENTAG:
- case C_UNTAG:
- SF_SET_TAG (def_symbol_in_progress);
- /* intentional fallthrough */
- case C_FILE:
- case C_TPDEF:
- SF_SET_DEBUG (def_symbol_in_progress);
- S_SET_SEGMENT (def_symbol_in_progress, SEG_DEBUG);
- break;
-
- case C_EFCN:
- SF_SET_LOCAL (def_symbol_in_progress); /* Do not emit this symbol. */
- /* intentional fallthrough */
- case C_BLOCK:
- SF_SET_PROCESS (def_symbol_in_progress); /* Will need processing before writing */
- /* intentional fallthrough */
- case C_FCN:
- S_SET_SEGMENT (def_symbol_in_progress, SEG_E0);
-
- if (strcmp (S_GET_NAME (def_symbol_in_progress), ".bf") == 0)
- { /* .bf */
- if (function_lineoff < 0)
- {
- fprintf (stderr, "`.bf' symbol without preceding function\n");
- } /* missing function symbol */
- SA_GET_SYM_LNNOPTR (last_line_symbol) = function_lineoff;
-
- SF_SET_PROCESS (last_line_symbol);
- function_lineoff = -1;
- }
- break;
-
- #ifdef C_AUTOARG
- case C_AUTOARG:
- #endif /* C_AUTOARG */
- case C_AUTO:
- case C_REG:
- case C_MOS:
- case C_MOE:
- case C_MOU:
- case C_ARG:
- case C_REGPARM:
- case C_FIELD:
- case C_EOS:
- SF_SET_DEBUG (def_symbol_in_progress);
- S_SET_SEGMENT (def_symbol_in_progress, SEG_ABSOLUTE);
- break;
-
- case C_EXT:
- case C_STAT:
- case C_LABEL:
- /* Valid but set somewhere else (s_comm, s_lcomm, colon) */
- break;
-
- case C_USTATIC:
- case C_EXTDEF:
- case C_ULABEL:
- as_warn ("unexpected storage class %d", S_GET_STORAGE_CLASS (def_symbol_in_progress));
- break;
- } /* switch on storage class */
-
- /* Now that we have built a debug symbol, try to find if we should
- merge with an existing symbol or not. If a symbol is C_EFCN or
- SEG_ABSOLUTE or untagged SEG_DEBUG it never merges. We also
- don't merge labels, which are in a different namespace, nor
- symbols which have not yet been defined since they are typically
- unique, nor do we merge tags with non-tags. */
-
- /* Two cases for functions. Either debug followed by definition or
- definition followed by debug. For definition first, we will
- merge the debug symbol into the definition. For debug first, the
- lineno entry MUST point to the definition function or else it
- will point off into space when crawl_symbols() merges the debug
- symbol into the real symbol. Therefor, let's presume the debug
- symbol is a real function reference. */
-
- /* FIXME-SOON If for some reason the definition label/symbol is
- never seen, this will probably leave an undefined symbol at link
- time. */
-
- if (S_GET_STORAGE_CLASS (def_symbol_in_progress) == C_EFCN
- || S_GET_STORAGE_CLASS (def_symbol_in_progress) == C_LABEL
- || (S_GET_SEGMENT (def_symbol_in_progress) == SEG_DEBUG
- && !SF_GET_TAG (def_symbol_in_progress))
- || S_GET_SEGMENT (def_symbol_in_progress) == SEG_ABSOLUTE
- || def_symbol_in_progress->sy_forward != NULL
- || (symbolP = symbol_find_base (S_GET_NAME (def_symbol_in_progress), DO_NOT_STRIP)) == NULL
- || (SF_GET_TAG (def_symbol_in_progress) != SF_GET_TAG (symbolP)))
- {
- symbol_append (def_symbol_in_progress, symbol_lastP, &symbol_rootP,
- &symbol_lastP);
- }
- else
- {
- /* This symbol already exists, merge the newly created symbol
- into the This is not mandatory. The linker can handle
- duplicate symbols correctly. But I guess that it save a *lot*
- of space if the assembly file defines a lot of
- symbols. [loic] */
-
- /* The debug entry (def_symbol_in_progress) is merged into the
- previous definition. */
-
- c_symbol_merge (def_symbol_in_progress, symbolP);
- /* FIXME-SOON Should *def_symbol_in_progress be free'd? xoxorich. */
- def_symbol_in_progress = symbolP;
-
- if (SF_GET_FUNCTION (def_symbol_in_progress)
- || SF_GET_TAG (def_symbol_in_progress))
- {
- /* For functions, and tags, the symbol *must* be where the
- debug symbol appears. Move the existing symbol to the
- current place. */
- /* If it already is at the end of the symbol list, do nothing */
- if (def_symbol_in_progress != symbol_lastP)
- {
- symbol_remove (def_symbol_in_progress, &symbol_rootP,
- &symbol_lastP);
- symbol_append (def_symbol_in_progress, symbol_lastP,
- &symbol_rootP, &symbol_lastP);
- } /* if not already in place */
- } /* if function */
- } /* normal or mergable */
-
- if (SF_GET_TAG (def_symbol_in_progress)
- && symbol_find_base (S_GET_NAME (def_symbol_in_progress), DO_NOT_STRIP) == NULL)
- {
- tag_insert (S_GET_NAME (def_symbol_in_progress), def_symbol_in_progress);
- }
-
- if (SF_GET_FUNCTION (def_symbol_in_progress))
- {
- know (sizeof (def_symbol_in_progress) <= sizeof (long));
- function_lineoff
- = c_line_new (def_symbol_in_progress, 0, 0, &zero_address_frag);
-
- SF_SET_PROCESS (def_symbol_in_progress);
-
- if (symbolP == NULL)
- {
- /* That is, if this is the first time we've seen the
- function... */
- symbol_table_insert (def_symbol_in_progress);
- } /* definition follows debug */
- } /* Create the line number entry pointing to the function being defined */
-
- def_symbol_in_progress = NULL;
- demand_empty_rest_of_line ();
- return;
- }
-
- static void
- DEFUN_VOID (obj_coff_dim)
- {
- register int dim_index;
-
- if (def_symbol_in_progress == NULL)
- {
- as_warn (".dim pseudo-op used outside of .def/.endef: ignored.");
- demand_empty_rest_of_line ();
- return;
- } /* if not inside .def/.endef */
-
- S_SET_NUMBER_AUXILIARY (def_symbol_in_progress, 1);
-
- for (dim_index = 0; dim_index < DIMNUM; dim_index++)
- {
- SKIP_WHITESPACES ();
- SA_SET_SYM_DIMEN (def_symbol_in_progress, dim_index, get_absolute_expression ());
-
- switch (*input_line_pointer)
- {
-
- case ',':
- input_line_pointer++;
- break;
-
- default:
- as_warn ("badly formed .dim directive ignored");
- /* intentional fallthrough */
- case '\n':
- case ';':
- dim_index = DIMNUM;
- break;
- } /* switch on following character */
- } /* for each dimension */
-
- demand_empty_rest_of_line ();
- return;
- } /* obj_coff_dim() */
-
- static void
- obj_coff_line ()
- {
- int this_base;
-
- if (def_symbol_in_progress == NULL)
- {
- obj_coff_ln ();
- return;
- } /* if it looks like a stabs style line */
-
- this_base = get_absolute_expression ();
- if (this_base > line_base)
- {
- line_base = this_base;
- }
-
-
- #ifndef NO_LISTING
- {
- extern int listing;
- if (listing && 0)
- {
- listing_source_line (line_base);
- }
- }
- #endif
- S_SET_NUMBER_AUXILIARY (def_symbol_in_progress, 1);
- SA_SET_SYM_LNNO (def_symbol_in_progress, line_base);
-
- demand_empty_rest_of_line ();
- return;
- } /* obj_coff_line() */
-
- static void
- obj_coff_size ()
- {
- if (def_symbol_in_progress == NULL)
- {
- as_warn (".size pseudo-op used outside of .def/.endef ignored.");
- demand_empty_rest_of_line ();
- return;
- } /* if not inside .def/.endef */
-
- S_SET_NUMBER_AUXILIARY (def_symbol_in_progress, 1);
- SA_SET_SYM_SIZE (def_symbol_in_progress, get_absolute_expression ());
- demand_empty_rest_of_line ();
- return;
- } /* obj_coff_size() */
-
- static void
- obj_coff_scl ()
- {
- if (def_symbol_in_progress == NULL)
- {
- as_warn (".scl pseudo-op used outside of .def/.endef ignored.");
- demand_empty_rest_of_line ();
- return;
- } /* if not inside .def/.endef */
-
- S_SET_STORAGE_CLASS (def_symbol_in_progress, get_absolute_expression ());
- demand_empty_rest_of_line ();
- return;
- } /* obj_coff_scl() */
-
- static void
- obj_coff_tag ()
- {
- char *symbol_name;
- char name_end;
-
- if (def_symbol_in_progress == NULL)
- {
- as_warn (".tag pseudo-op used outside of .def/.endef ignored.");
- demand_empty_rest_of_line ();
- return;
- } /* if not inside .def/.endef */
-
- S_SET_NUMBER_AUXILIARY (def_symbol_in_progress, 1);
- symbol_name = input_line_pointer;
- name_end = get_symbol_end ();
-
- /* Assume that the symbol referred to by .tag is always defined. */
- /* This was a bad assumption. I've added find_or_make. xoxorich. */
- SA_SET_SYM_TAGNDX (def_symbol_in_progress, (long) tag_find_or_make (symbol_name));
- if (SA_GET_SYM_TAGNDX (def_symbol_in_progress) == 0L)
- {
- as_warn ("tag not found for .tag %s", symbol_name);
- } /* not defined */
-
- SF_SET_TAGGED (def_symbol_in_progress);
- *input_line_pointer = name_end;
-
- demand_empty_rest_of_line ();
- return;
- } /* obj_coff_tag() */
-
- static void
- obj_coff_type ()
- {
- if (def_symbol_in_progress == NULL)
- {
- as_warn (".type pseudo-op used outside of .def/.endef ignored.");
- demand_empty_rest_of_line ();
- return;
- } /* if not inside .def/.endef */
-
- S_SET_DATA_TYPE (def_symbol_in_progress, get_absolute_expression ());
-
- if (ISFCN (S_GET_DATA_TYPE (def_symbol_in_progress)) &&
- S_GET_STORAGE_CLASS (def_symbol_in_progress) != C_TPDEF)
- {
- SF_SET_FUNCTION (def_symbol_in_progress);
- } /* is a function */
-
- demand_empty_rest_of_line ();
- return;
- } /* obj_coff_type() */
-
- static void
- obj_coff_val ()
- {
- if (def_symbol_in_progress == NULL)
- {
- as_warn (".val pseudo-op used outside of .def/.endef ignored.");
- demand_empty_rest_of_line ();
- return;
- } /* if not inside .def/.endef */
-
- if (is_name_beginner (*input_line_pointer))
- {
- char *symbol_name = input_line_pointer;
- char name_end = get_symbol_end ();
-
- if (!strcmp (symbol_name, "."))
- {
- def_symbol_in_progress->sy_frag = frag_now;
- S_SET_VALUE (def_symbol_in_progress, obstack_next_free (&frags) - frag_now->fr_literal);
- /* If the .val is != from the .def (e.g. statics) */
- }
- else if (strcmp (S_GET_NAME (def_symbol_in_progress), symbol_name))
- {
- def_symbol_in_progress->sy_forward = symbol_find_or_make (symbol_name);
-
- /* If the segment is undefined when the forward
- reference is solved, then copy the segment id
- from the forward symbol. */
- SF_SET_GET_SEGMENT (def_symbol_in_progress);
-
- /* FIXME: gcc can generate address expressions
- here in unusual cases (search for "obscure"
- in sdbout.c). We just ignore the offset
- here, thus generating incorrect debugging
- information. We ignore the rest of the
- line just below. */
- }
- /* Otherwise, it is the name of a non debug symbol and
- its value will be calculated later. */
- *input_line_pointer = name_end;
-
- /* FIXME: this is to avoid an error message in the
- FIXME case mentioned just above. */
- while (! is_end_of_line[*input_line_pointer])
- ++input_line_pointer;
- }
- else
- {
- S_SET_VALUE (def_symbol_in_progress, get_absolute_expression ());
- } /* if symbol based */
-
- demand_empty_rest_of_line ();
- return;
- } /* obj_coff_val() */
-
- /*
- * Maintain a list of the tagnames of the structres.
- */
-
- static void
- tag_init ()
- {
- tag_hash = hash_new ();
- return;
- } /* tag_init() */
-
- static void
- tag_insert (name, symbolP)
- char *name;
- symbolS *symbolP;
- {
- register char *error_string;
-
- if (*(error_string = hash_jam (tag_hash, name, (char *) symbolP)))
- {
- as_fatal ("Inserting \"%s\" into structure table failed: %s",
- name, error_string);
- }
- return;
- } /* tag_insert() */
-
- static symbolS *
- tag_find_or_make (name)
- char *name;
- {
- symbolS *symbolP;
-
- if ((symbolP = tag_find (name)) == NULL)
- {
- symbolP = symbol_new (name,
- SEG_UNKNOWN,
- 0,
- &zero_address_frag);
-
- tag_insert (S_GET_NAME (symbolP), symbolP);
- } /* not found */
-
- return (symbolP);
- } /* tag_find_or_make() */
-
- static symbolS *
- tag_find (name)
- char *name;
- {
- #ifdef STRIP_UNDERSCORE
- if (*name == '_')
- name++;
- #endif /* STRIP_UNDERSCORE */
- return ((symbolS *) hash_find (tag_hash, name));
- } /* tag_find() */
-
- void
- obj_read_begin_hook ()
- {
- /* These had better be the same. Usually 18 bytes. */
- #ifndef BFD_HEADERS
- know (sizeof (SYMENT) == sizeof (AUXENT));
- know (SYMESZ == AUXESZ);
- #endif
- tag_init ();
-
- return;
- } /* obj_read_begin_hook() */
-
- /* This function runs through the symbol table and puts all the
- externals onto another chain */
-
- /* The chain of externals */
- symbolS *symbol_externP = NULL;
- symbolS *symbol_extern_lastP = NULL;
-
- stack *block_stack;
- symbolS *last_functionP = NULL;
- symbolS *last_tagP;
-
- static unsigned int
- DEFUN_VOID (yank_symbols)
- {
- symbolS *symbolP;
- unsigned int symbol_number = 0;
- unsigned int last_file_symno = 0;
-
- for (symbolP = symbol_rootP;
- symbolP;
- symbolP = symbolP ? symbol_next (symbolP) : symbol_rootP)
- {
- if (!SF_GET_DEBUG (symbolP))
- {
- /* Debug symbols do not need all this rubbish */
- symbolS *real_symbolP;
-
- /* L* and C_EFCN symbols never merge. */
- if (!SF_GET_LOCAL (symbolP)
- && S_GET_STORAGE_CLASS (symbolP) != C_LABEL
- && symbolP->sy_forward == NULL
- && (real_symbolP = symbol_find_base (S_GET_NAME (symbolP), DO_NOT_STRIP))
- && real_symbolP != symbolP)
- {
- /* FIXME-SOON: where do dups come from?
- Maybe tag references before definitions? xoxorich. */
- /* Move the debug data from the debug symbol to the
- real symbol. Do NOT do the oposite (i.e. move from
- real symbol to debug symbol and remove real symbol from the
- list.) Because some pointers refer to the real symbol
- whereas no pointers refer to the debug symbol. */
- c_symbol_merge (symbolP, real_symbolP);
- /* Replace the current symbol by the real one */
- /* The symbols will never be the last or the first
- because : 1st symbol is .file and 3 last symbols are
- .text, .data, .bss */
- symbol_remove (real_symbolP, &symbol_rootP, &symbol_lastP);
- symbol_insert (real_symbolP, symbolP, &symbol_rootP, &symbol_lastP);
- symbol_remove (symbolP, &symbol_rootP, &symbol_lastP);
- symbolP = real_symbolP;
- } /* if not local but dup'd */
-
- if (flagseen['R'] && (S_GET_SEGMENT (symbolP) == SEG_E1))
- {
- S_SET_SEGMENT (symbolP, SEG_E0);
- } /* push data into text */
-
- S_SET_VALUE (symbolP,
- S_GET_VALUE (symbolP) + symbolP->sy_frag->fr_address);
-
- if (!S_IS_DEFINED (symbolP) && !SF_GET_LOCAL (symbolP))
- {
- S_SET_EXTERNAL (symbolP);
- }
- else if (S_GET_STORAGE_CLASS (symbolP) == C_NULL)
- {
- if (S_GET_SEGMENT (symbolP) == SEG_E0)
- {
- S_SET_STORAGE_CLASS (symbolP, C_LABEL);
- }
- else
- {
- S_SET_STORAGE_CLASS (symbolP, C_STAT);
- }
- }
-
- /* Mainly to speed up if not -g */
- if (SF_GET_PROCESS (symbolP))
- {
- /* Handle the nested blocks auxiliary info. */
- if (S_GET_STORAGE_CLASS (symbolP) == C_BLOCK)
- {
- if (!strcmp (S_GET_NAME (symbolP), ".bb"))
- stack_push (block_stack, (char *) &symbolP);
- else
- { /* .eb */
- register symbolS *begin_symbolP;
- begin_symbolP = *(symbolS **) stack_pop (block_stack);
- if (begin_symbolP == (symbolS *) 0)
- as_warn ("mismatched .eb");
- else
- SA_SET_SYM_ENDNDX (begin_symbolP, symbol_number + 2);
- }
- }
- /* If we are able to identify the type of a function, and we
- are out of a function (last_functionP == 0) then, the
- function symbol will be associated with an auxiliary
- entry. */
- if (last_functionP == (symbolS *) 0 &&
- SF_GET_FUNCTION (symbolP))
- {
- last_functionP = symbolP;
-
- if (S_GET_NUMBER_AUXILIARY (symbolP) < 1)
- {
- S_SET_NUMBER_AUXILIARY (symbolP, 1);
- } /* make it at least 1 */
-
- /* Clobber possible stale .dim information. */
- #if 0
- /* Iffed out by steve - this fries the lnnoptr info too */
- bzero (symbolP->sy_symbol.ost_auxent[0].x_sym.x_fcnary.x_ary.x_dimen,
- sizeof (symbolP->sy_symbol.ost_auxent[0].x_sym.x_fcnary.x_ary.x_dimen));
- #endif
- }
- /* The C_FCN doesn't need any additional information. I
- don't even know if this is needed for sdb. But the
- standard assembler generates it, so... */
- if (S_GET_STORAGE_CLASS (symbolP) == C_EFCN)
- {
- if (last_functionP == (symbolS *) 0)
- as_fatal ("C_EFCN symbol out of scope");
- SA_SET_SYM_FSIZE (last_functionP,
- (long) (S_GET_VALUE (symbolP) -
- S_GET_VALUE (last_functionP)));
- SA_SET_SYM_ENDNDX (last_functionP, symbol_number);
- last_functionP = (symbolS *) 0;
- }
- }
- }
- else if (SF_GET_TAG (symbolP))
- {
- /* First descriptor of a structure must point to
- the first slot after the structure description. */
- last_tagP = symbolP;
-
- }
- else if (S_GET_STORAGE_CLASS (symbolP) == C_EOS)
- {
- /* +2 take in account the current symbol */
- SA_SET_SYM_ENDNDX (last_tagP, symbol_number + 2);
- }
- else if (S_GET_STORAGE_CLASS (symbolP) == C_FILE)
- {
- if (S_GET_VALUE (symbolP))
- {
- S_SET_VALUE (symbolP, last_file_symno);
- last_file_symno = symbol_number;
- } /* no one points at the first .file symbol */
- } /* if debug or tag or eos or file */
-
- /* We must put the external symbols apart. The loader
- does not bomb if we do not. But the references in
- the endndx field for a .bb symbol are not corrected
- if an external symbol is removed between .bb and .be.
- I.e in the following case :
- [20] .bb endndx = 22
- [21] foo external
- [22] .be
- ld will move the symbol 21 to the end of the list but
- endndx will still be 22 instead of 21. */
-
-
- if (SF_GET_LOCAL (symbolP))
- {
- /* remove C_EFCN and LOCAL (L...) symbols */
- /* next pointer remains valid */
- symbol_remove (symbolP, &symbol_rootP, &symbol_lastP);
-
- }
- else if (!S_IS_DEFINED (symbolP)
- && !S_IS_DEBUG (symbolP)
- && !SF_GET_STATICS (symbolP) &&
- S_GET_STORAGE_CLASS (symbolP) == C_EXT)
- { /* C_EXT && !SF_GET_FUNCTION(symbolP)) */
- /* if external, Remove from the list */
- symbolS *hold = symbol_previous (symbolP);
-
- symbol_remove (symbolP, &symbol_rootP, &symbol_lastP);
- symbol_clear_list_pointers (symbolP);
- symbol_append (symbolP, symbol_extern_lastP, &symbol_externP, &symbol_extern_lastP);
- symbolP = hold;
- }
- else
- {
- if (SF_GET_STRING (symbolP))
- {
- symbolP->sy_name_offset = string_byte_count;
- string_byte_count += strlen (S_GET_NAME (symbolP)) + 1;
- }
- else
- {
- symbolP->sy_name_offset = 0;
- } /* fix "long" names */
-
- symbolP->sy_number = symbol_number;
- symbol_number += 1 + S_GET_NUMBER_AUXILIARY (symbolP);
- } /* if local symbol */
- } /* traverse the symbol list */
- return symbol_number;
-
- }
-
-
- static unsigned int
- DEFUN_VOID (glue_symbols)
- {
- unsigned int symbol_number = 0;
- symbolS *symbolP;
- for (symbolP = symbol_externP; symbol_externP;)
- {
- symbolS *tmp = symbol_externP;
-
- /* append */
- symbol_remove (tmp, &symbol_externP, &symbol_extern_lastP);
- symbol_append (tmp, symbol_lastP, &symbol_rootP, &symbol_lastP);
-
- /* and process */
- if (SF_GET_STRING (tmp))
- {
- tmp->sy_name_offset = string_byte_count;
- string_byte_count += strlen (S_GET_NAME (tmp)) + 1;
- }
- else
- {
- tmp->sy_name_offset = 0;
- } /* fix "long" names */
-
- tmp->sy_number = symbol_number;
- symbol_number += 1 + S_GET_NUMBER_AUXILIARY (tmp);
- } /* append the entire extern chain */
- return symbol_number;
-
- }
-
- static unsigned int
- DEFUN_VOID (tie_tags)
- {
- unsigned int symbol_number = 0;
-
- symbolS *symbolP;
- for (symbolP = symbol_rootP; symbolP; symbolP =
- symbol_next (symbolP))
- {
- symbolP->sy_number = symbol_number;
-
-
-
- if (SF_GET_TAGGED (symbolP))
- {
- SA_SET_SYM_TAGNDX
- (symbolP,
- ((symbolS *) SA_GET_SYM_TAGNDX (symbolP))->sy_number);
- }
-
- symbol_number += 1 + S_GET_NUMBER_AUXILIARY (symbolP);
- }
- return symbol_number;
-
- }
-
- static void
- DEFUN (crawl_symbols, (h, abfd),
- object_headers *h AND
- bfd * abfd)
- {
-
- unsigned int i;
- symbolS *symbolP;
-
- /* Initialize the stack used to keep track of the matching .bb .be */
-
- block_stack = stack_init (512, sizeof (symbolS *));
- /* JF deal with forward references first... */
- for (symbolP = symbol_rootP; symbolP; symbolP = symbol_next (symbolP))
- if (symbolP->sy_forward)
- {
- S_SET_VALUE (symbolP, (S_GET_VALUE (symbolP)
- + S_GET_VALUE (symbolP->sy_forward)
- + symbolP->sy_forward->sy_frag->fr_address));
- if (SF_GET_GET_SEGMENT (symbolP))
- S_SET_SEGMENT (symbolP, S_GET_SEGMENT (symbolP->sy_forward));
- }
-
- /* The symbol list should be ordered according to the following sequence
- * order :
- * . .file symbol
- * . debug entries for functions
- * . fake symbols for the sections, including.text .data and .bss
- * . defined symbols
- * . undefined symbols
- * But this is not mandatory. The only important point is to put the
- * undefined symbols at the end of the list.
- */
-
- if (symbol_rootP == NULL
- || S_GET_STORAGE_CLASS (symbol_rootP) != C_FILE)
- {
- c_dot_file_symbol ("fake");
- }
- /* Is there a .file symbol ? If not insert one at the beginning. */
-
- /*
- * Build up static symbols for the sections, they are filled in later
- */
-
-
- for (i = SEG_E0; i < SEG_E9; i++)
- {
- if (segment_info[i].scnhdr.s_name[0])
- {
- char name[9];
-
- strncpy (name, segment_info[i].scnhdr.s_name, 8);
- name[8] = '\0';
- segment_info[i].dot = c_section_symbol (name, i - SEG_E0 + 1);
- }
- }
-
-
- /* Take all the externals out and put them into another chain */
- H_SET_SYMBOL_TABLE_SIZE (h, yank_symbols ());
- /* Take the externals and glue them onto the end.*/
- H_SET_SYMBOL_TABLE_SIZE (h, H_GET_SYMBOL_COUNT (h) + glue_symbols ());
-
- H_SET_SYMBOL_TABLE_SIZE (h, tie_tags ());
- know (symbol_externP == NULL);
- know (symbol_extern_lastP == NULL);
-
- return;
- }
-
- /*
- * Find strings by crawling along symbol table chain.
- */
-
- void
- DEFUN (w_strings, (where),
- char *where)
- {
- symbolS *symbolP;
-
- /* Gotta do md_ byte-ordering stuff for string_byte_count first - KWK */
- md_number_to_chars (where, string_byte_count, sizeof (string_byte_count));
- where += sizeof (string_byte_count);
- for (symbolP = symbol_rootP;
- symbolP;
- symbolP = symbol_next (symbolP))
- {
- unsigned int size;
-
- if (SF_GET_STRING (symbolP))
- {
- size = strlen (S_GET_NAME (symbolP)) + 1;
-
- memcpy (where, S_GET_NAME (symbolP), size);
- where += size;
-
- }
- }
-
- }
-
- static void
- DEFUN (do_linenos_for, (abfd, h, file_cursor),
- bfd * abfd AND
- object_headers * h AND
- unsigned long *file_cursor)
- {
- unsigned int idx;
- unsigned long start = *file_cursor;
-
- for (idx = SEG_E0; idx < SEG_E9; idx++)
- {
- segment_info_type *s = segment_info + idx;
-
-
- if (s->scnhdr.s_nlnno != 0)
- {
- struct lineno_list *line_ptr;
-
- struct external_lineno *buffer =
- (struct external_lineno *) xmalloc (s->scnhdr.s_nlnno * LINESZ);
-
- struct external_lineno *dst = buffer;
-
- /* Run through the table we've built and turn it into its external
- form, take this chance to remove duplicates */
-
- for (line_ptr = s->lineno_list_head;
- line_ptr != (struct lineno_list *) NULL;
- line_ptr = line_ptr->next)
- {
-
- if (line_ptr->line.l_lnno == 0)
- {
- /* Turn a pointer to a symbol into the symbols' index */
- line_ptr->line.l_addr.l_symndx =
- ((symbolS *) line_ptr->line.l_addr.l_symndx)->sy_number;
- }
- else
- {
- line_ptr->line.l_addr.l_paddr += ((struct frag *) (line_ptr->frag))->fr_address;
- }
-
-
- (void) bfd_coff_swap_lineno_out (abfd, &(line_ptr->line), dst);
- dst++;
-
- }
-
- s->scnhdr.s_lnnoptr = *file_cursor;
-
- bfd_write (buffer, 1, s->scnhdr.s_nlnno * LINESZ, abfd);
- free (buffer);
-
- *file_cursor += s->scnhdr.s_nlnno * LINESZ;
- }
- }
- H_SET_LINENO_SIZE (h, *file_cursor - start);
- }
-
-
- /* Now we run through the list of frag chains in a segment and
- make all the subsegment frags appear at the end of the
- list, as if the seg 0 was extra long */
-
- static void
- DEFUN_VOID (remove_subsegs)
- {
- unsigned int i;
-
- for (i = SEG_E0; i < SEG_UNKNOWN; i++)
- {
- frchainS *head = segment_info[i].frchainP;
- fragS dummy;
- fragS *prev_frag = &dummy;
-
- while (head && head->frch_seg == i)
- {
- prev_frag->fr_next = head->frch_root;
- prev_frag = head->frch_last;
- head = head->frch_next;
- }
- prev_frag->fr_next = 0;
- }
- }
-
- int machine;
- int coff_flags;
- extern void
- DEFUN_VOID (write_object_file)
- {
- int i;
- struct frchain *frchain_ptr;
-
- object_headers headers;
- unsigned long file_cursor;
- bfd *abfd;
- unsigned int addr;
- abfd = bfd_openw (out_file_name, TARGET_FORMAT);
-
-
- if (abfd == 0)
- {
- as_perror ("FATAL: Can't create %s", out_file_name);
- exit (42);
- }
- bfd_set_format (abfd, bfd_object);
- bfd_set_arch_mach (abfd, BFD_ARCH, machine);
-
- string_byte_count = 4;
-
- for (frchain_ptr = frchain_root;
- frchain_ptr != (struct frchain *) NULL;
- frchain_ptr = frchain_ptr->frch_next)
- {
- /* Run through all the sub-segments and align them up. Also close any
- open frags. We tack a .fill onto the end of the frag chain so
- that any .align's size can be worked by looking at the next
- frag */
-
- subseg_new (frchain_ptr->frch_seg, frchain_ptr->frch_subseg);
- #ifndef SUB_SEGMENT_ALIGN
- #define SUB_SEGMENT_ALIGN(SEG) 1
- #endif
- frag_align (SUB_SEGMENT_ALIGN (now_seg), NOP_OPCODE);
- frag_wane (frag_now);
- frag_now->fr_fix = 0;
- know (frag_now->fr_next == NULL);
- }
-
-
- remove_subsegs ();
-
-
- for (i = SEG_E0; i < SEG_UNKNOWN; i++)
- {
- relax_segment (segment_info[i].frchainP->frch_root, i);
- }
-
- H_SET_NUMBER_OF_SECTIONS (&headers, 0);
-
- /* Find out how big the sections are, and set the addresses. */
- addr = 0;
- for (i = SEG_E0; i < SEG_UNKNOWN; i++)
- {
- long size;
-
- segment_info[i].scnhdr.s_paddr = addr;
- segment_info[i].scnhdr.s_vaddr = addr;
-
- if (segment_info[i].scnhdr.s_name[0])
- {
- H_SET_NUMBER_OF_SECTIONS (&headers,
- H_GET_NUMBER_OF_SECTIONS (&headers) + 1);
- }
-
- size = size_section (abfd, i);
- addr += size;
-
- if (i == SEG_E0)
- H_SET_TEXT_SIZE (&headers, size);
- else if (i == SEG_E1)
- H_SET_DATA_SIZE (&headers, size);
- else if (i == SEG_E2)
- H_SET_BSS_SIZE (&headers, size);
- }
-
- /* Turn the gas native symbol table shape into a coff symbol table */
- crawl_symbols (&headers, abfd);
-
- if (string_byte_count == 4)
- string_byte_count = 0;
-
- H_SET_STRING_SIZE (&headers, string_byte_count);
-
- #if !defined(TC_H8300) && !defined(TC_Z8K)
- for (i = SEG_E0; i < SEG_UNKNOWN; i++)
- {
- fixup_mdeps (segment_info[i].frchainP->frch_root, &headers, i);
- fixup_segment (&segment_info[i], i);
- }
- #endif
-
- file_cursor = H_GET_TEXT_FILE_OFFSET (&headers);
-
- bfd_seek (abfd, file_cursor, 0);
-
- /* Plant the data */
-
- fill_section (abfd, &headers, &file_cursor);
-
- do_relocs_for (abfd, &headers, &file_cursor);
-
- do_linenos_for (abfd, &headers, &file_cursor);
-
- H_SET_FILE_MAGIC_NUMBER (&headers, COFF_MAGIC);
- #ifndef OBJ_COFF_OMIT_TIMESTAMP
- H_SET_TIME_STAMP (&headers, (long)time((long*)0));
- #else
- H_SET_TIME_STAMP (&headers, 0);
- #endif
-
- #ifdef KEEP_RELOC_INFO
- H_SET_FLAGS (&headers, ((H_GET_LINENO_SIZE(&headers) ? 0 : F_LNNO) |
- COFF_FLAGS | coff_flags));
- #else
- H_SET_FLAGS (&headers, ((H_GET_LINENO_SIZE(&headers) ? 0 : F_LNNO) |
- (H_GET_RELOCATION_SIZE(&headers) ? 0 : F_RELFLG) |
- COFF_FLAGS | coff_flags));
- #endif
-
- {
- unsigned int symtable_size = H_GET_SYMBOL_TABLE_SIZE (&headers);
- char *buffer1 = xmalloc (symtable_size + string_byte_count + 1);
- char *ptr = buffer1;
- H_SET_SYMBOL_TABLE_POINTER (&headers, bfd_tell (abfd));
- w_symbols (abfd, buffer1, symbol_rootP);
- if (string_byte_count > 0)
- w_strings (buffer1 + symtable_size);
- bfd_write (buffer1, 1, symtable_size + string_byte_count, abfd);
- free (buffer1);
- }
-
- coff_header_append (abfd, &headers);
-
- if (bfd_close_all_done (abfd) == false)
- as_fatal ("Can't close %s: %s", out_file_name,
- bfd_errmsg (bfd_error));
- }
-
-
- static void
- DEFUN (change_to_section, (name, len, exp),
- char *name AND
- unsigned int len AND
- unsigned int exp)
- {
- unsigned int i;
- /* Find out if we've already got a section of this name etc */
- for (i = SEG_E0; i < SEG_E9 && segment_info[i].scnhdr.s_name[0]; i++)
- {
- if (strncmp (segment_info[i].scnhdr.s_name, name, len) == 0)
- {
- subseg_new (i, exp);
- return;
- }
- }
- /* No section, add one */
- strncpy (segment_info[i].scnhdr.s_name, name, 8);
- segment_info[i].scnhdr.s_flags = STYP_REG;
- subseg_new (i, exp);
- }
-
- /*
- * implement the .section pseudo op:
- * .section name {, "flags"}
- * ^ ^
- * | +--- optional flags: 'b' for bss
- * | 'i' for info
- * +-- section name 'l' for lib
- * 'n' for noload
- * 'o' for over
- * 'w' for data
- * 'x' for text
- * But if the argument is not a quoted string, treat it as a
- * subsegment number.
- */
-
- void
- DEFUN_VOID (obj_coff_section)
- {
- /* Strip out the section name */
- char *section_name;
- char *section_name_end;
- char c;
- int argp;
- unsigned int len;
- unsigned int exp;
- long flags;
-
- section_name = input_line_pointer;
- c = get_symbol_end ();
- section_name_end = input_line_pointer;
-
- len = section_name_end - section_name;
- input_line_pointer++;
- SKIP_WHITESPACE ();
-
- argp = 0;
- if (c == ',')
- argp = 1;
- else if (*input_line_pointer == ',')
- {
- argp = 1;
- ++input_line_pointer;
- SKIP_WHITESPACE ();
- }
-
- exp = 0;
- flags = 0;
- if (argp)
- {
- if (*input_line_pointer != '"')
- exp = get_absolute_expression ();
- else
- {
- ++input_line_pointer;
- while (*input_line_pointer != '"'
- && ! is_end_of_line[*input_line_pointer])
- {
- switch (*input_line_pointer)
- {
- case 'b': flags |= STYP_BSS; break;
- case 'i': flags |= STYP_INFO; break;
- case 'l': flags |= STYP_LIB; break;
- case 'n': flags |= STYP_NOLOAD; break;
- case 'o': flags |= STYP_OVER; break;
- case 'w': flags |= STYP_DATA; break;
- case 'x': flags |= STYP_TEXT; break;
- default:
- as_warn("unknown section attribute '%c'",
- *input_line_pointer);
- break;
- }
- ++input_line_pointer;
- }
- if (*input_line_pointer == '"')
- ++input_line_pointer;
- }
- }
-
- change_to_section (section_name, len, exp);
-
- segment_info[now_seg].scnhdr.s_flags |= flags;
-
- *section_name_end = c;
- }
-
-
- static void
- obj_coff_text ()
- {
- change_to_section (".text", 5, get_absolute_expression ());
- }
-
-
- static void
- obj_coff_data ()
- {
- change_to_section (".data", 5, get_absolute_expression ());
- }
-
- static void
- obj_coff_bss()
- {
- if (*input_line_pointer == '\n') /* .bss */
- change_to_section(".bss",4, get_absolute_expression());
- else /* .bss id,expr */
- obj_coff_lcomm();
- }
-
- static void
- obj_coff_ident()
- {
- segT current_seg = now_seg; /* save current seg */
- subsegT current_subseg = now_subseg;
- change_to_section (".comment", 8, 0); /* .comment seg */
- stringer (1); /* read string */
- subseg_new (current_seg, current_subseg); /* restore current seg */
- }
-
- void
- c_symbol_merge (debug, normal)
- symbolS *debug;
- symbolS *normal;
- {
- S_SET_DATA_TYPE (normal, S_GET_DATA_TYPE (debug));
- S_SET_STORAGE_CLASS (normal, S_GET_STORAGE_CLASS (debug));
-
- if (S_GET_NUMBER_AUXILIARY (debug) > S_GET_NUMBER_AUXILIARY (normal))
- {
- S_SET_NUMBER_AUXILIARY (normal, S_GET_NUMBER_AUXILIARY (debug));
- } /* take the most we have */
-
- if (S_GET_NUMBER_AUXILIARY (debug) > 0)
- {
- memcpy ((char *) &normal->sy_symbol.ost_auxent[0], (char *) &debug->sy_symbol.ost_auxent[0], S_GET_NUMBER_AUXILIARY (debug) * AUXESZ);
- } /* Move all the auxiliary information */
-
- /* Move the debug flags. */
- SF_SET_DEBUG_FIELD (normal, SF_GET_DEBUG_FIELD (debug));
- } /* c_symbol_merge() */
-
- static int
- DEFUN (c_line_new, (symbol, paddr, line_number, frag),
- symbolS * symbol AND
- long paddr AND
- unsigned short line_number AND
- fragS * frag)
- {
- struct lineno_list *new_line =
- (struct lineno_list *) xmalloc (sizeof (struct lineno_list));
-
- segment_info_type *s = segment_info + now_seg;
- new_line->line.l_lnno = line_number;
-
- if (line_number == 0)
- {
- last_line_symbol = symbol;
- new_line->line.l_addr.l_symndx = (long) symbol;
- }
- else
- {
- new_line->line.l_addr.l_paddr = paddr;
- }
-
- new_line->frag = (char *) frag;
- new_line->next = (struct lineno_list *) NULL;
-
-
- if (s->lineno_list_head == (struct lineno_list *) NULL)
- {
- s->lineno_list_head = new_line;
- }
- else
- {
- s->lineno_list_tail->next = new_line;
- }
- s->lineno_list_tail = new_line;
- return LINESZ * s->scnhdr.s_nlnno++;
- }
-
- void
- c_dot_file_symbol (filename)
- char *filename;
- {
- symbolS *symbolP;
-
- symbolP = symbol_new (".file",
- SEG_DEBUG,
- 0,
- &zero_address_frag);
-
- S_SET_STORAGE_CLASS (symbolP, C_FILE);
- S_SET_NUMBER_AUXILIARY (symbolP, 1);
- SA_SET_FILE_FNAME (symbolP, filename);
- #ifndef NO_LISTING
- {
- extern int listing;
- if (listing)
- {
- listing_source_file (filename);
- }
-
- }
-
- #endif
- SF_SET_DEBUG (symbolP);
- S_SET_VALUE (symbolP, (long) previous_file_symbol);
-
- previous_file_symbol = symbolP;
-
- /* Make sure that the symbol is first on the symbol chain */
- if (symbol_rootP != symbolP)
- {
- if (symbolP == symbol_lastP)
- {
- symbol_lastP = symbol_lastP->sy_previous;
- } /* if it was the last thing on the list */
-
- symbol_remove (symbolP, &symbol_rootP, &symbol_lastP);
- symbol_insert (symbolP, symbol_rootP, &symbol_rootP, &symbol_lastP);
- symbol_rootP = symbolP;
- } /* if not first on the list */
-
- } /* c_dot_file_symbol() */
-
- /*
- * Build a 'section static' symbol.
- */
-
- symbolS *
- c_section_symbol (name, idx)
- char *name;
- int idx;
- {
- symbolS *symbolP;
-
- symbolP = symbol_new (name, idx,
- 0,
- &zero_address_frag);
-
- S_SET_STORAGE_CLASS (symbolP, C_STAT);
- S_SET_NUMBER_AUXILIARY (symbolP, 1);
-
- SF_SET_STATICS (symbolP);
-
- return symbolP;
- } /* c_section_symbol() */
-
- static void
- DEFUN (w_symbols, (abfd, where, symbol_rootP),
- bfd * abfd AND
- char *where AND
- symbolS * symbol_rootP)
- {
- symbolS *symbolP;
- unsigned int i;
-
- /* First fill in those values we have only just worked out */
- for (i = SEG_E0; i < SEG_E9; i++)
- {
- symbolP = segment_info[i].dot;
- if (symbolP)
- {
-
- SA_SET_SCN_SCNLEN (symbolP, segment_info[i].scnhdr.s_size);
- SA_SET_SCN_NRELOC (symbolP, segment_info[i].scnhdr.s_nreloc);
- SA_SET_SCN_NLINNO (symbolP, segment_info[i].scnhdr.s_nlnno);
-
- }
- }
-
- /*
- * Emit all symbols left in the symbol chain.
- */
- for (symbolP = symbol_rootP; symbolP; symbolP = symbol_next (symbolP))
- {
- /* Used to save the offset of the name. It is used to point
- to the string in memory but must be a file offset. */
- register char *temp;
-
- tc_coff_symbol_emit_hook (symbolP);
-
- temp = S_GET_NAME (symbolP);
- if (SF_GET_STRING (symbolP))
- {
- S_SET_OFFSET (symbolP, symbolP->sy_name_offset);
- S_SET_ZEROES (symbolP, 0);
- }
- else
- {
- bzero (symbolP->sy_symbol.ost_entry.n_name, SYMNMLEN);
- strncpy (symbolP->sy_symbol.ost_entry.n_name, temp, SYMNMLEN);
- }
- where = symbol_to_chars (abfd, where, symbolP);
- S_SET_NAME (symbolP, temp);
- }
-
- } /* w_symbols() */
-
- static void
- DEFUN_VOID (obj_coff_lcomm)
- {
- char *name;
- char c;
- int temp;
- char *p;
-
- symbolS *symbolP;
- name = input_line_pointer;
-
- c = get_symbol_end ();
- p = input_line_pointer;
- *p = c;
- SKIP_WHITESPACE ();
- if (*input_line_pointer != ',')
- {
- as_bad ("Expected comma after name");
- ignore_rest_of_line ();
- return;
- }
- if (*input_line_pointer == '\n')
- {
- as_bad ("Missing size expression");
- return;
- }
- input_line_pointer++;
- if ((temp = get_absolute_expression ()) < 0)
- {
- as_warn ("lcomm length (%d.) <0! Ignored.", temp);
- ignore_rest_of_line ();
- return;
- }
- *p = 0;
-
- symbolP = symbol_find_or_make(name);
-
- if (S_GET_SEGMENT(symbolP) == SEG_UNKNOWN &&
- S_GET_VALUE(symbolP) == 0)
- {
- if (! need_pass_2)
- {
- char *p;
- segT current_seg = now_seg; /* save current seg */
- subsegT current_subseg = now_subseg;
-
- subseg_new (SEG_E2, 1);
- symbolP->sy_frag = frag_now;
- p = frag_var(rs_org, 1, 1, (relax_substateT)0, symbolP,
- temp, (char *)0);
- *p = 0;
- subseg_new (current_seg, current_subseg); /* restore current seg */
- S_SET_SEGMENT(symbolP, SEG_E2);
- S_SET_STORAGE_CLASS(symbolP, C_STAT);
- }
- }
- else
- as_bad("Symbol %s already defined", name);
-
- demand_empty_rest_of_line();
- }
-
- static void
- DEFUN (fixup_mdeps, (frags, h, this_segment),
- fragS * frags AND
- object_headers * h AND
- segT this_segment)
- {
- subseg_change (this_segment, 0);
- while (frags)
- {
- switch (frags->fr_type)
- {
- case rs_align:
- case rs_org:
- frags->fr_type = rs_fill;
- frags->fr_offset =
- (frags->fr_next->fr_address - frags->fr_address - frags->fr_fix);
- break;
- case rs_machine_dependent:
- md_convert_frag (h, frags);
- frag_wane (frags);
- break;
- default:
- ;
- }
- frags = frags->fr_next;
- }
- }
-
- #if 1
- static void
- DEFUN (fixup_segment, (segP, this_segment_type),
- segment_info_type * segP AND
- segT this_segment_type)
- {
- register fixS * fixP;
- register symbolS *add_symbolP;
- register symbolS *sub_symbolP;
- register long add_number;
- register int size;
- register char *place;
- register long where;
- register char pcrel;
- register fragS *fragP;
- register segT add_symbol_segment = SEG_ABSOLUTE;
-
-
- for (fixP = segP->fix_root; fixP; fixP = fixP->fx_next)
- {
- fragP = fixP->fx_frag;
- know (fragP);
- where = fixP->fx_where;
- place = fragP->fr_literal + where;
- size = fixP->fx_size;
- add_symbolP = fixP->fx_addsy;
- #ifdef TC_I960
- if (fixP->fx_callj && TC_S_IS_CALLNAME (add_symbolP))
- {
- /* Relocation should be done via the
- associated 'bal' entry point
- symbol. */
-
- if (!TC_S_IS_BALNAME (tc_get_bal_of_call (add_symbolP)))
- {
- as_bad ("No 'bal' entry point for leafproc %s",
- S_GET_NAME (add_symbolP));
- continue;
- }
- fixP->fx_addsy = add_symbolP = tc_get_bal_of_call (add_symbolP);
- } /* callj relocation */
- #endif
- sub_symbolP = fixP->fx_subsy;
- add_number = fixP->fx_offset;
- pcrel = fixP->fx_pcrel;
-
- if (add_symbolP)
- {
- add_symbol_segment = S_GET_SEGMENT (add_symbolP);
- } /* if there is an addend */
-
- if (sub_symbolP)
- {
- if (!add_symbolP)
- {
- /* Its just -sym */
- if (S_GET_SEGMENT (sub_symbolP) != SEG_ABSOLUTE)
- {
- as_bad ("Negative of non-absolute symbol %s", S_GET_NAME (sub_symbolP));
- } /* not absolute */
-
- add_number -= S_GET_VALUE (sub_symbolP);
- fixP->fx_subsy = 0;
-
- /* if sub_symbol is in the same segment that add_symbol
- and add_symbol is either in DATA, TEXT, BSS or ABSOLUTE */
- }
- else if ((S_GET_SEGMENT (sub_symbolP) == add_symbol_segment)
- && (SEG_NORMAL (add_symbol_segment)
- || (add_symbol_segment == SEG_ABSOLUTE)))
- {
- /* Difference of 2 symbols from same segment. */
- /* Can't make difference of 2 undefineds: 'value' means */
- /* something different for N_UNDF. */
- #ifdef TC_I960
- /* Makes no sense to use the difference of 2 arbitrary symbols
- as the target of a call instruction. */
- if (fixP->fx_callj)
- {
- as_bad ("callj to difference of 2 symbols");
- }
- #endif /* TC_I960 */
- add_number += S_GET_VALUE (add_symbolP) -
- S_GET_VALUE (sub_symbolP);
-
- add_symbolP = NULL;
- fixP->fx_addsy = NULL;
- }
- else
- {
- /* Different segments in subtraction. */
- know (!(S_IS_EXTERNAL (sub_symbolP) && (S_GET_SEGMENT (sub_symbolP) == SEG_ABSOLUTE)));
-
- if ((S_GET_SEGMENT (sub_symbolP) == SEG_ABSOLUTE))
- {
- add_number -= S_GET_VALUE (sub_symbolP);
- }
- else
- {
- as_bad ("Can't emit reloc {- %s-seg symbol \"%s\"} @ file address %d.",
- segment_name (S_GET_SEGMENT (sub_symbolP)),
- S_GET_NAME (sub_symbolP), fragP->fr_address + where);
- } /* if absolute */
- }
- } /* if sub_symbolP */
-
- if (add_symbolP)
- {
- if (add_symbol_segment == this_segment_type && pcrel)
- {
- /*
- * This fixup was made when the symbol's segment was
- * SEG_UNKNOWN, but it is now in the local segment.
- * So we know how to do the address without relocation.
- */
- #ifdef TC_I960
- /* reloc_callj() may replace a 'call' with a 'calls' or a 'bal',
- * in which cases it modifies *fixP as appropriate. In the case
- * of a 'calls', no further work is required, and *fixP has been
- * set up to make the rest of the code below a no-op.
- */
- reloc_callj (fixP);
- #endif /* TC_I960 */
-
- add_number += S_GET_VALUE (add_symbolP);
- add_number -= md_pcrel_from (fixP);
- #ifdef TC_I386
- /* On the 386 we must adjust by the segment
- vaddr as well. Ian Taylor. */
- add_number -= segP->scnhdr.s_vaddr;
- #endif
- pcrel = 0; /* Lie. Don't want further pcrel processing. */
- fixP->fx_addsy = NULL; /* No relocations please. */
- }
- else
- {
- switch (add_symbol_segment)
- {
- case SEG_ABSOLUTE:
- #ifdef TC_I960
- reloc_callj (fixP); /* See comment about reloc_callj() above*/
- #endif /* TC_I960 */
- add_number += S_GET_VALUE (add_symbolP);
- fixP->fx_addsy = NULL;
- add_symbolP = NULL;
- break;
- default:
-
- #ifdef TC_A29K
- /* This really should be handled in the linker, but
- backward compatibility forbids. */
- add_number += S_GET_VALUE (add_symbolP);
- #else
- add_number += S_GET_VALUE (add_symbolP) +
- segment_info[S_GET_SEGMENT (add_symbolP)].scnhdr.s_paddr;
- #endif
- break;
-
- case SEG_UNKNOWN:
- #ifdef TC_I960
- if ((int) fixP->fx_bit_fixP == 13)
- {
- /* This is a COBR instruction. They have only a
- * 13-bit displacement and are only to be used
- * for local branches: flag as error, don't generate
- * relocation.
- */
- as_bad ("can't use COBR format with external label");
- fixP->fx_addsy = NULL; /* No relocations please. */
- continue;
- } /* COBR */
- #endif /* TC_I960 */
- #ifdef TC_I386
- /* 386 COFF uses a peculiar format in
- which the value of a common symbol is
- stored in the .text segment (I've
- checked this on SVR3.2 and SCO 3.2.2)
- Ian Taylor <ian@cygnus.com>. */
- if (S_IS_COMMON (add_symbolP))
- add_number += S_GET_VALUE (add_symbolP);
- #endif
- break;
-
-
- } /* switch on symbol seg */
- } /* if not in local seg */
- } /* if there was a + symbol */
-
- if (pcrel)
- {
- add_number -= md_pcrel_from (fixP);
- if (add_symbolP == 0)
- {
- fixP->fx_addsy = &abs_symbol;
- } /* if there's an add_symbol */
- #ifdef TC_I386
- /* On the 386 we must adjust by the segment vaddr
- as well. Ian Taylor. */
- add_number -= segP->scnhdr.s_vaddr;
- #endif
- } /* if pcrel */
-
- if (!fixP->fx_bit_fixP)
- {
- if ((size == 1 &&
- (add_number & ~0xFF) && ((add_number & ~0xFF) != (-1 & ~0xFF))) ||
- (size == 2 &&
- (add_number & ~0xFFFF) && ((add_number & ~0xFFFF) != (-1 & ~0xFFFF))))
- {
- as_bad ("Value of %d too large for field of %d bytes at 0x%x",
- add_number, size, fragP->fr_address + where);
- } /* generic error checking */
- #ifdef WARN_SIGNED_OVERFLOW_WORD
- /* Warn if a .word value is too large when treated as
- a signed number. We already know it is not too
- negative. This is to catch over-large switches
- generated by gcc on the 68k. */
- if (!flagseen['J']
- && size == 2
- && add_number > 0x7fff)
- as_bad ("Signed .word overflow; switch may be too large; %d at 0x%x",
- add_number, fragP->fr_address + where);
- #endif
- } /* not a bit fix */
- /* once this fix has been applied, we don't have to output anything
- nothing more need be done -*/
- md_apply_fix (fixP, add_number);
- } /* For each fixS in this segment. */
- } /* fixup_segment() */
-
- #endif
-