-#if defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS))
-
-#ifndef TC_RELOC_RTSYM_LOC_FIXUP
-#define TC_RELOC_RTSYM_LOC_FIXUP(X) (1)
-#endif
-
-/* fixup_segment()
-
- Go through all the fixS's in a segment and see which ones can be
- handled now. (These consist of fixS where we have since discovered
- the value of a symbol, or the address of the frag involved.)
- For each one, call md_apply_fix to put the fix into the frag data.
-
- Result is a count of how many relocation structs will be needed to
- handle the remaining fixS's that we couldn't completely handle here.
- These will be output later by emit_relocations(). */
-
-static long
-fixup_segment (fixP, this_segment_type)
- register fixS *fixP;
- segT this_segment_type; /* N_TYPE bits for segment. */
-{
- long seg_reloc_count = 0;
- symbolS *add_symbolP;
- symbolS *sub_symbolP;
- valueT add_number;
- int size;
- char *place;
- long where;
- int pcrel, plt;
- fragS *fragP;
- segT add_symbol_segment = absolute_section;
-
- /* If the linker is doing the relaxing, we must not do any fixups.
-
- Well, strictly speaking that's not true -- we could do any that are
- PC-relative and don't cross regions that could change size. And for the
- i960 (the only machine for which we've got a relaxing linker right now),
- we might be able to turn callx/callj into bal anyways in cases where we
- know the maximum displacement. */
- if (linkrelax && TC_LINKRELAX_FIXUP (this_segment_type))
- {
- for (; fixP; fixP = fixP->fx_next)
- seg_reloc_count++;
- TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count);
- return seg_reloc_count;
- }
-
- for (; fixP; fixP = fixP->fx_next)
- {
-#ifdef DEBUG5
- fprintf (stderr, "\nprocessing fixup:\n");
- print_fixup (fixP);
-#endif
-
- 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_VALIDATE_FIX
- TC_VALIDATE_FIX (fixP, this_segment_type, skip);
-#endif
- sub_symbolP = fixP->fx_subsy;
- add_number = fixP->fx_offset;
- pcrel = fixP->fx_pcrel;
- plt = fixP->fx_plt;
-
- if (add_symbolP != NULL
- && symbol_mri_common_p (add_symbolP))
- {
- know (add_symbolP->sy_value.X_op == O_symbol);
- add_number += S_GET_VALUE (add_symbolP);
- fixP->fx_offset = add_number;
- add_symbolP = fixP->fx_addsy =
- symbol_get_value_expression (add_symbolP)->X_add_symbol;
- }
-
- if (add_symbolP)
- add_symbol_segment = S_GET_SEGMENT (add_symbolP);
-
- if (sub_symbolP)
- {
- resolve_symbol_value (sub_symbolP);
- if (add_symbolP == NULL || add_symbol_segment == absolute_section)
- {
- if (add_symbolP != NULL)
- {
- add_number += S_GET_VALUE (add_symbolP);
- add_symbolP = NULL;
- fixP->fx_addsy = NULL;
- }
-
- /* It's just -sym. */
- if (S_GET_SEGMENT (sub_symbolP) == absolute_section)
- {
- add_number -= S_GET_VALUE (sub_symbolP);
- fixP->fx_subsy = NULL;
- }
- else if (pcrel
- && S_GET_SEGMENT (sub_symbolP) == this_segment_type)
- {
- /* Should try converting to a constant. */
- goto bad_sub_reloc;
- }
- else
- bad_sub_reloc:
- as_bad_where (fixP->fx_file, fixP->fx_line,
- _("Negative of non-absolute symbol %s"),
- S_GET_NAME (sub_symbolP));
- }
- else if (S_GET_SEGMENT (sub_symbolP) == add_symbol_segment
- && SEG_NORMAL (add_symbol_segment))
- {
- /* 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_tcbit)
- as_bad_where (fixP->fx_file, fixP->fx_line,
- _("callj to difference of 2 symbols"));
-#endif /* TC_I960 */
- add_number += S_GET_VALUE (add_symbolP) -
- S_GET_VALUE (sub_symbolP);
-
- add_symbolP = NULL;
- pcrel = 0; /* No further pcrel processing. */
-
- /* Let the target machine make the final determination
- as to whether or not a relocation will be needed to
- handle this fixup. */
- if (!TC_FORCE_RELOCATION_SECTION (fixP, this_segment_type))
- {
- fixP->fx_pcrel = 0;
- fixP->fx_addsy = NULL;
- fixP->fx_subsy = NULL;
- }
- }
- else
- {
- /* Different segments in subtraction. */
- know (!(S_IS_EXTERNAL (sub_symbolP)
- && (S_GET_SEGMENT (sub_symbolP) == absolute_section)));
-
- if ((S_GET_SEGMENT (sub_symbolP) == absolute_section))
- add_number -= S_GET_VALUE (sub_symbolP);
-
-#ifdef DIFF_EXPR_OK
- else if (S_GET_SEGMENT (sub_symbolP) == this_segment_type
-#if 0
- /* Do this even if it's already described as
- pc-relative. For example, on the m68k, an
- operand of "pc@(foo-.-2)" should address
- "foo" in a pc-relative mode. */
- && pcrel
-#endif
- )
- {
- /* Make it pc-relative. */
- add_number += (MD_PCREL_FROM_SECTION (fixP, this_segment_type)
- - S_GET_VALUE (sub_symbolP));
- pcrel = 1;
- fixP->fx_pcrel = 1;
- sub_symbolP = 0;
- fixP->fx_subsy = 0;
- }
-#endif
-#ifdef UNDEFINED_DIFFERENCE_OK
- /* The PA needs this for PIC code generation. We basically
- don't want to do anything if we have the difference of two
- symbols at this point. */
- else if (1)
- {
- /* Leave it alone. */
- }
-#endif
-#ifdef BFD_ASSEMBLER
- else if (fixP->fx_r_type == BFD_RELOC_GPREL32
- || fixP->fx_r_type == BFD_RELOC_GPREL16)
- {
- /* Leave it alone. */
- }
-#endif
- else
- {
- char buf[50];
- sprint_value (buf, fragP->fr_address + where);
- as_bad_where (fixP->fx_file, fixP->fx_line,
- _("Subtraction of two symbols in different sections \"%s\" {%s section} - \"%s\" {%s section} at file address %s."),
- S_GET_NAME (add_symbolP),
- segment_name (S_GET_SEGMENT (add_symbolP)),
- S_GET_NAME (sub_symbolP),
- segment_name (S_GET_SEGMENT (sub_symbolP)),
- buf);
- }
- }
- }
-
- if (add_symbolP)
- {
- if (add_symbol_segment == this_segment_type && pcrel && !plt
- && TC_RELOC_RTSYM_LOC_FIXUP (fixP))
- {
- /* 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_SECTION (fixP, this_segment_type);
- /* Lie. Don't want further pcrel processing. */
- pcrel = 0;
-
- /* Let the target machine make the final determination
- as to whether or not a relocation will be needed to
- handle this fixup. */
- if (!TC_FORCE_RELOCATION (fixP))
- {
- fixP->fx_pcrel = 0;
- fixP->fx_addsy = NULL;
- }
- }
- else
- {
- if (add_symbol_segment == absolute_section
- && ! pcrel)
- {
-#ifdef TC_I960
- /* See comment about reloc_callj() above. */
- reloc_callj (fixP);
-#endif /* TC_I960 */
- add_number += S_GET_VALUE (add_symbolP);
-
- /* Let the target machine make the final determination
- as to whether or not a relocation will be needed to
- handle this fixup. */
-
- if (!TC_FORCE_RELOCATION (fixP))
- {
- fixP->fx_addsy = NULL;
- add_symbolP = NULL;
- }
- }
- else if (add_symbol_segment == undefined_section
-#ifdef BFD_ASSEMBLER
- || bfd_is_com_section (add_symbol_segment)
-#endif
- )
- {
-#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_where (fixP->fx_file, fixP->fx_line,
- _("can't use COBR format with external label"));
- fixP->fx_addsy = NULL;
- fixP->fx_done = 1;
- continue;
- } /* COBR. */
-#endif /* TC_I960 */
-
-#ifdef OBJ_COFF
-#ifdef TE_I386AIX
- if (S_IS_COMMON (add_symbolP))
- add_number += S_GET_VALUE (add_symbolP);
-#endif /* TE_I386AIX */
-#endif /* OBJ_COFF */
- ++seg_reloc_count;
- }
- else
- {
- seg_reloc_count++;
- if (TC_FIX_ADJUSTABLE (fixP))
- add_number += S_GET_VALUE (add_symbolP);
- }
- }
- }
-
- if (pcrel)
- {
- add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment_type);
- if (add_symbolP == 0)
- {
-#ifndef BFD_ASSEMBLER
- fixP->fx_addsy = &abs_symbol;
-#else
- fixP->fx_addsy = section_symbol (absolute_section);
-#endif
- symbol_mark_used_in_reloc (fixP->fx_addsy);
- ++seg_reloc_count;
- }
- }
-
- if (!fixP->fx_done)
- {
-#ifdef MD_APPLY_FIX3
- md_apply_fix3 (fixP, &add_number, this_segment_type);
-#else
-#ifdef BFD_ASSEMBLER
- md_apply_fix (fixP, &add_number);
-#else
- md_apply_fix (fixP, add_number);
-#endif
-#endif
-
-#ifndef TC_HANDLES_FX_DONE
- /* If the tc-* files haven't been converted, assume it's handling
- it the old way, where a null fx_addsy means that the fix has
- been applied completely, and no further work is needed. */
- if (fixP->fx_addsy == 0 && fixP->fx_pcrel == 0)
- fixP->fx_done = 1;
-#endif
- }
-
- if (!fixP->fx_bit_fixP && !fixP->fx_no_overflow && size > 0)
- {
- if ((size_t) size < sizeof (valueT))
- {
- valueT mask;
-
- mask = 0;
- mask--; /* Set all bits to one. */
- mask <<= size * 8 - (fixP->fx_signed ? 1 : 0);
- if ((add_number & mask) != 0 && (add_number & mask) != mask)
- {
- char buf[50], buf2[50];
- sprint_value (buf, fragP->fr_address + where);
- if (add_number > 1000)
- sprint_value (buf2, add_number);
- else
- sprintf (buf2, "%ld", (long) add_number);
- as_bad_where (fixP->fx_file, fixP->fx_line,
- _("Value of %s too large for field of %d bytes at %s"),
- buf2, size, buf);
- } /* 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 (!flag_signed_overflow_ok
- && size == 2
- && add_number > 0x7fff)
- as_bad_where (fixP->fx_file, fixP->fx_line,
- _("Signed .word overflow; switch may be too large; %ld at 0x%lx"),
- (long) add_number,
- (unsigned long) (fragP->fr_address + where));
-#endif
- } /* Not a bit fix. */
-
-#ifdef TC_VALIDATE_FIX
- skip: ATTRIBUTE_UNUSED_LABEL
- ;
-#endif
-#ifdef DEBUG5
- fprintf (stderr, "result:\n");
- print_fixup (fixP);
-#endif
- } /* For each fixS in this segment. */
-
- TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count);
- return seg_reloc_count;
-}
-
-#endif /* defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS)) */
-
projects / deliverable / binutils-gdb.git / blobdiff