/* write.c - emit .o file
-
- Copyright (C) 1986, 1987, 1990, 1991, 1992 Free Software Foundation, Inc.
+ Copyright (C) 1986, 87, 90, 91, 92, 93, 1994 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
#include "obstack.h"
#include "output-file.h"
-/* The NOP_OPCODE is for the alignment fill value.
- * fill it a nop instruction so that the disassembler does not choke
- * on it
- */
+/* The NOP_OPCODE is for the alignment fill value. Fill it with a nop
+ instruction so that the disassembler does not choke on it. */
#ifndef NOP_OPCODE
#define NOP_OPCODE 0x00
#endif
+#ifndef TC_ADJUST_RELOC_COUNT
+#define TC_ADJUST_RELOC_COUNT(FIXP,COUNT)
+#endif
+
+#ifndef TC_FORCE_RELOCATION
+#define TC_FORCE_RELOCATION(FIXP) 0
+#endif
+
+#ifndef WORKING_DOT_WORD
+extern CONST int md_short_jump_size;
+extern CONST int md_long_jump_size;
+#endif
+
+int symbol_table_frozen;
+
+#ifdef BFD_ASSEMBLER
+/* We generally attach relocs to frag chains. However, after we have
+ chained these all together into a segment, any relocs we add after
+ that must be attached to a segment. This will include relocs added
+ in md_estimate_size_for_relax, for example. */
+static int frags_chained = 0;
+#endif
+
+#ifndef BFD_ASSEMBLER
+
#ifndef MANY_SEGMENTS
struct frag *text_frag_root;
struct frag *data_frag_root;
static struct frag *bss_last_frag; /* Last frag in segment. */
#endif
+#ifndef BFD
static object_headers headers;
-
-long string_byte_count;
-
static char *the_object_file;
+#endif
+long string_byte_count;
char *next_object_file_charP; /* Tracks object file bytes. */
#ifndef OBJ_VMS
int magic_number_for_object_file = DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE;
#endif
-static int is_dnrange PARAMS ((struct frag * f1, struct frag * f2));
+#endif /* BFD_ASSEMBLER */
+
+#ifdef BFD_ASSEMBLER
+static fixS *fix_new_internal PARAMS ((fragS *, int where, int size,
+ symbolS *add, symbolS *sub,
+ offsetT offset, int pcrel,
+ bfd_reloc_code_real_type r_type));
+#else
+static fixS *fix_new_internal PARAMS ((fragS *, int where, int size,
+ symbolS *add, symbolS *sub,
+ offsetT offset, int pcrel,
+ int r_type));
+#endif
+#if defined (BFD_ASSEMBLER) || !defined (BFD)
static long fixup_segment PARAMS ((fixS * fixP, segT this_segment_type));
-static relax_addressT relax_align PARAMS ((relax_addressT addr, long align));
-void relax_segment PARAMS ((struct frag * seg_frag_root, segT seg_type));
+#endif
+static relax_addressT relax_align PARAMS ((relax_addressT addr, int align));
/*
* fix_new()
*
* Create a fixS in obstack 'notes'.
*/
-fixS *
-fix_new (frag, where, size, add_symbol, sub_symbol, offset, pcrel, r_type)
+static fixS *
+fix_new_internal (frag, where, size, add_symbol, sub_symbol, offset, pcrel,
+ r_type)
fragS *frag; /* Which frag? */
int where; /* Where in that frag? */
- short int size; /* 1, 2, or 4 usually. */
+ int size; /* 1, 2, or 4 usually. */
symbolS *add_symbol; /* X_add_symbol. */
- symbolS *sub_symbol; /* X_subtract_symbol. */
- long offset; /* X_add_number. */
+ symbolS *sub_symbol; /* X_op_symbol. */
+ offsetT offset; /* X_add_number. */
int pcrel; /* TRUE if PC-relative relocation. */
+#ifdef BFD_ASSEMBLER
+ bfd_reloc_code_real_type r_type; /* Relocation type */
+#else
int r_type; /* Relocation type */
+#endif
{
fixS *fixP;
fixP->fx_subsy = sub_symbol;
fixP->fx_offset = offset;
fixP->fx_pcrel = pcrel;
-#if defined(TC_SPARC) || defined(TC_A29K) || defined( NEED_FX_R_TYPE)
+#if defined(NEED_FX_R_TYPE) || defined (BFD_ASSEMBLER)
fixP->fx_r_type = r_type;
#endif
- /* JF these 'cuz of the NS32K stuff */
fixP->fx_im_disp = 0;
fixP->fx_pcrel_adjust = 0;
- fixP->fx_bsr = 0;
fixP->fx_bit_fixP = 0;
+ fixP->fx_addnumber = 0;
+ fixP->tc_fix_data = NULL;
+ fixP->fx_tcbit = 0;
+ fixP->fx_done = 0;
+
+#ifdef TC_something
+ fixP->fx_bsr = 0;
+#endif
+
+ as_where (&fixP->fx_file, &fixP->fx_line);
+
+ /* Usually, we want relocs sorted numerically, but while
+ comparing to older versions of gas that have relocs
+ reverse sorted, it is convenient to have this compile
+ time option. xoxorich. */
- /* usually, we want relocs sorted numerically, but while
- comparing to older versions of gas that have relocs
- reverse sorted, it is convenient to have this compile
- time option. xoxorich. */
+ {
+
+#ifdef BFD_ASSEMBLER
+ fixS **seg_fix_rootP = (frags_chained
+ ? &seg_info (now_seg)->fix_root
+ : &frchain_now->fix_root);
+ fixS **seg_fix_tailP = (frags_chained
+ ? &seg_info (now_seg)->fix_tail
+ : &frchain_now->fix_tail);
+#endif
#ifdef REVERSE_SORT_RELOCS
- fixP->fx_next = *seg_fix_rootP;
- *seg_fix_rootP = fixP;
+ fixP->fx_next = *seg_fix_rootP;
+ *seg_fix_rootP = fixP;
#else /* REVERSE_SORT_RELOCS */
- fixP->fx_next = NULL;
+ fixP->fx_next = NULL;
- if (*seg_fix_tailP)
- (*seg_fix_tailP)->fx_next = fixP;
- else
- *seg_fix_rootP = fixP;
- *seg_fix_tailP = fixP;
+ if (*seg_fix_tailP)
+ (*seg_fix_tailP)->fx_next = fixP;
+ else
+ *seg_fix_rootP = fixP;
+ *seg_fix_tailP = fixP;
#endif /* REVERSE_SORT_RELOCS */
- fixP->fx_callj = 0;
- return (fixP);
-} /* fix_new() */
+ }
-#ifndef BFD
+ return fixP;
+}
+
+/* Create a fixup relative to a symbol (plus a constant). */
+
+fixS *
+fix_new (frag, where, size, add_symbol, offset, pcrel, r_type)
+ fragS *frag; /* Which frag? */
+ int where; /* Where in that frag? */
+ short int size; /* 1, 2, or 4 usually. */
+ symbolS *add_symbol; /* X_add_symbol. */
+ offsetT offset; /* X_add_number. */
+ int pcrel; /* TRUE if PC-relative relocation. */
+#ifdef BFD_ASSEMBLER
+ bfd_reloc_code_real_type r_type; /* Relocation type */
+#else
+ int r_type; /* Relocation type */
+#endif
+{
+ return fix_new_internal (frag, where, size, add_symbol,
+ (symbolS *) NULL, offset, pcrel, r_type);
+}
+
+/* Create a fixup for an expression. Currently we only support fixups
+ for difference expressions. That is itself more than most object
+ file formats support anyhow. */
+
+fixS *
+fix_new_exp (frag, where, size, exp, pcrel, r_type)
+ fragS *frag; /* Which frag? */
+ int where; /* Where in that frag? */
+ short int size; /* 1, 2, or 4 usually. */
+ expressionS *exp; /* Expression. */
+ int pcrel; /* TRUE if PC-relative relocation. */
+#ifdef BFD_ASSEMBLER
+ bfd_reloc_code_real_type r_type; /* Relocation type */
+#else
+ int r_type; /* Relocation type */
+#endif
+{
+ symbolS *add = NULL;
+ symbolS *sub = NULL;
+ offsetT off = 0;
+
+ switch (exp->X_op)
+ {
+ case O_absent:
+ break;
+
+ case O_uminus:
+ sub = exp->X_add_symbol;
+ off = exp->X_add_number;
+ break;
+
+ case O_subtract:
+ sub = exp->X_op_symbol;
+ /* Fall through. */
+ case O_symbol:
+ add = exp->X_add_symbol;
+ /* Fall through. */
+ case O_constant:
+ off = exp->X_add_number;
+ break;
+
+ default:
+ as_bad ("expression too complex for fixup");
+ }
+
+ return fix_new_internal (frag, where, size, add, sub, off,
+ pcrel, r_type);
+}
+
+/* Append a string onto another string, bumping the pointer along. */
+void
+append (charPP, fromP, length)
+ char **charPP;
+ char *fromP;
+ unsigned long length;
+{
+ /* Don't trust memcpy() of 0 chars. */
+ if (length == 0)
+ return;
+
+ memcpy (*charPP, fromP, length);
+ *charPP += length;
+}
+
+#ifndef BFD_ASSEMBLER
+int section_alignment[SEG_MAXIMUM_ORDINAL];
+#endif
+
+/*
+ * This routine records the largest alignment seen for each segment.
+ * If the beginning of the segment is aligned on the worst-case
+ * boundary, all of the other alignments within it will work. At
+ * least one object format really uses this info.
+ */
+void
+record_alignment (seg, align)
+ /* Segment to which alignment pertains */
+ segT seg;
+ /* Alignment, as a power of 2 (e.g., 1 => 2-byte boundary, 2 => 4-byte
+ boundary, etc.) */
+ int align;
+{
+#ifdef BFD_ASSEMBLER
+ if (align > bfd_get_section_alignment (stdoutput, seg))
+ bfd_set_section_alignment (stdoutput, seg, align);
+#else
+ if (align > section_alignment[(int) seg])
+ section_alignment[(int) seg] = align;
+#endif
+}
+
+#if defined (BFD_ASSEMBLER) || ! defined (BFD)
+
+static fragS *
+chain_frchains_together_1 (section, frchp)
+ segT section;
+ struct frchain *frchp;
+{
+ fragS dummy, *prev_frag = &dummy;
+ fixS fix_dummy, *prev_fix = &fix_dummy;
+
+ for (; frchp && frchp->frch_seg == section; frchp = frchp->frch_next)
+ {
+ prev_frag->fr_next = frchp->frch_root;
+ prev_frag = frchp->frch_last;
+#ifdef BFD_ASSEMBLER
+ if (frchp->fix_root != (fixS *) NULL)
+ {
+ if (seg_info (section)->fix_root == (fixS *) NULL)
+ seg_info (section)->fix_root = frchp->fix_root;
+ prev_fix->fx_next = frchp->fix_root;
+ seg_info (section)->fix_tail = frchp->fix_tail;
+ prev_fix = frchp->fix_tail;
+ }
+#endif
+ }
+ prev_frag->fr_next = 0;
+ return prev_frag;
+}
+
+#endif
+
+#ifdef BFD_ASSEMBLER
+
+static void
+chain_frchains_together (abfd, section, xxx)
+ bfd *abfd; /* unused */
+ segT section;
+ PTR xxx; /* unused */
+{
+ segment_info_type *info;
+
+ /* BFD may have introduced its own sections without using
+ subseg_new, so it is possible that seg_info is NULL. */
+ info = seg_info (section);
+ if (info != (segment_info_type *) NULL)
+ info->frchainP->frch_last
+ = chain_frchains_together_1 (section, info->frchainP);
+
+ /* Now that we've chained the frags together, we must add new fixups
+ to the segment, not to the frag chain. */
+ frags_chained = 1;
+}
+
+#endif
+
+#if !defined (BFD) && !defined (BFD_ASSEMBLER)
void
remove_subsegs (head, seg, root, last)
fragS **root;
fragS **last;
{
- fragS dummy;
- fragS *prev_frag = &dummy;
*root = head->frch_root;
- while (head && head->frch_seg == seg)
+ *last = chain_frchains_together_1 (seg, head);
+}
+
+#endif /* BFD */
+
+#if defined (BFD_ASSEMBLER) || !defined (BFD)
+
+#ifdef BFD_ASSEMBLER
+static void
+cvt_frag_to_fill (sec, fragP)
+ segT sec;
+ fragS *fragP;
+#else
+static void
+cvt_frag_to_fill (headers, fragP)
+ object_headers *headers;
+ fragS *fragP;
+#endif
+{
+ switch (fragP->fr_type)
{
- prev_frag->fr_next = head->frch_root;
+ case rs_align:
+ case rs_org:
+#ifdef HANDLE_ALIGN
+ HANDLE_ALIGN (fragP);
+#endif
+ fragP->fr_type = rs_fill;
+ know (fragP->fr_next != NULL);
+ fragP->fr_offset = (fragP->fr_next->fr_address
+ - fragP->fr_address
+ - fragP->fr_fix) / fragP->fr_var;
+ break;
+
+ case rs_fill:
+ break;
+
+ case rs_machine_dependent:
+#ifdef BFD_ASSEMBLER
+ md_convert_frag (stdoutput, sec, fragP);
+#else
+ md_convert_frag (headers, fragP);
+#endif
+
+ assert (fragP->fr_next == NULL || (fragP->fr_next->fr_address - fragP->fr_address == fragP->fr_fix));
+
+ /*
+ * After md_convert_frag, we make the frag into a ".space 0".
+ * Md_convert_frag() should set up any fixSs and constants
+ * required.
+ */
+ frag_wane (fragP);
+ break;
+
+#ifndef WORKING_DOT_WORD
+ case rs_broken_word:
+ {
+ struct broken_word *lie;
+
+ if (fragP->fr_subtype)
+ {
+ fragP->fr_fix += md_short_jump_size;
+ for (lie = (struct broken_word *) (fragP->fr_symbol);
+ lie && lie->dispfrag == fragP;
+ lie = lie->next_broken_word)
+ if (lie->added == 1)
+ fragP->fr_fix += md_long_jump_size;
+ }
+ frag_wane (fragP);
+ }
+ break;
+#endif
- prev_frag = head->frch_last;
- head = head->frch_next;
+ default:
+ BAD_CASE (fragP->fr_type);
+ break;
}
- *last = prev_frag;
- prev_frag->fr_next = 0;
}
-void
-write_object_file ()
+#endif /* defined (BFD_ASSEMBLER) || !defined (BFD) */
+
+#ifdef BFD_ASSEMBLER
+static void
+relax_and_size_seg (abfd, sec, xxx)
+ bfd *abfd;
+ asection *sec;
+ PTR xxx;
{
- register struct frchain *frchainP; /* Track along all frchains. */
- register fragS *fragP; /* Track along all frags. */
- register struct frchain *next_frchainP;
- register fragS **prev_fragPP;
- unsigned int data_siz;
+ flagword flags;
+ fragS *fragp;
+ segment_info_type *seginfo;
+ int x;
+ valueT size, newsize;
- long object_file_size;
+ flags = bfd_get_section_flags (abfd, sec);
-#ifdef OBJ_VMS
- /*
- * Under VMS we try to be compatible with VAX-11 "C". Thus, we
- * call a routine to check for the definition of the procedure
- * "_main", and if so -- fix it up so that it can be program
- * entry point.
- */
- VMS_Check_For_Main ();
-#endif /* VMS */
- /*
- * After every sub-segment, we fake an ".align ...". This conforms to
- * BSD4.2 brane-damage. We then fake ".fill 0" because that is the
- * kind of frag that requires least thought. ".align" frags like to
- * have a following frag since that makes calculating their intended
- * length trivial.
- */
-#ifndef SUB_SEGMENT_ALIGN
-#define SUB_SEGMENT_ALIGN (2)
+ seginfo = (segment_info_type *) bfd_get_section_userdata (abfd, sec);
+ if (seginfo && seginfo->frchainP)
+ {
+ relax_segment (seginfo->frchainP->frch_root, sec);
+ for (fragp = seginfo->frchainP->frch_root; fragp; fragp = fragp->fr_next)
+ cvt_frag_to_fill (sec, fragp);
+ for (fragp = seginfo->frchainP->frch_root;
+ fragp->fr_next;
+ fragp = fragp->fr_next)
+ /* walk to last elt */;
+ size = fragp->fr_address + fragp->fr_fix;
+ }
+ else
+ size = 0;
+
+ if (size > 0 && ! seginfo->bss)
+ flags |= SEC_HAS_CONTENTS;
+
+ /* @@ This is just an approximation. */
+ if (seginfo && seginfo->fix_root)
+ flags |= SEC_RELOC;
+ else
+ flags &= ~SEC_RELOC;
+ x = bfd_set_section_flags (abfd, sec, flags);
+ assert (x == true);
+
+ newsize = md_section_align (sec, size);
+ x = bfd_set_section_size (abfd, sec, newsize);
+ assert (x == true);
+
+ /* If the size had to be rounded up, add some padding in the last
+ non-empty frag. */
+ assert (newsize >= size);
+ if (size != newsize)
+ {
+ fragS *last = seginfo->frchainP->frch_last;
+ fragp = seginfo->frchainP->frch_root;
+ while (fragp->fr_next != last)
+ fragp = fragp->fr_next;
+ last->fr_address = size;
+ fragp->fr_offset += newsize - size;
+ }
+
+#ifdef tc_frob_section
+ tc_frob_section (sec);
#endif
- for (frchainP = frchain_root; frchainP; frchainP = frchainP->frch_next)
+#ifdef obj_frob_section
+ obj_frob_section (sec);
+#endif
+}
+
+#ifdef DEBUG2
+static void
+dump_section_relocs (abfd, sec, stream_)
+ bfd *abfd;
+ asection *sec;
+ char *stream_;
+{
+ FILE *stream = (FILE *) stream_;
+ segment_info_type *seginfo = seg_info (sec);
+ fixS *fixp = seginfo->fix_root;
+
+ if (!fixp)
+ return;
+
+ fprintf (stream, "sec %s relocs:\n", sec->name);
+ while (fixp)
{
-#ifdef OBJ_VMS
- /*
- * Under VAX/VMS, the linker (and PSECT specifications)
- * take care of correctly aligning the segments.
- * Doing the alignment here (on initialized data) can
- * mess up the calculation of global data PSECT sizes.
- */
-#undef SUB_SEGMENT_ALIGN
-#define SUB_SEGMENT_ALIGN ((frchainP->frch_seg != SEG_DATA) ? 2 : 0)
-#endif /* VMS */
- subseg_new (frchainP->frch_seg, frchainP->frch_subseg);
- frag_align (SUB_SEGMENT_ALIGN, NOP_OPCODE);
- /* frag_align will have left a new frag. */
- /* Use this last frag for an empty ".fill". */
- /*
- * For this segment ...
- * Create a last frag. Do not leave a "being filled in frag".
- */
- frag_wane (frag_now);
- frag_now->fr_fix = 0;
- know (frag_now->fr_next == NULL);
- /* know( frags . obstack_c_base == frags . obstack_c_next_free ); */
- /* Above shows we haven't left a half-completed object on obstack. */
- } /* walk the frag chain */
+ symbolS *s = fixp->fx_addsy;
+ if (s)
+ {
+ fprintf (stream, " %08x: %s(%s", fixp, S_GET_NAME (s),
+ s->bsym->section->name);
+ if (s->bsym->flags & BSF_SECTION_SYM)
+ {
+ fprintf (stream, " section sym");
+ if (S_GET_VALUE (s))
+ fprintf (stream, "+%x", S_GET_VALUE (s));
+ }
+ else
+ fprintf (stream, "+%x", S_GET_VALUE (s));
+ fprintf (stream, ")+%x\n", fixp->fx_offset);
+ }
+ else
+ fprintf (stream, " %08x: type %d no sym\n", fixp, fixp->fx_r_type);
+ fixp = fixp->fx_next;
+ }
+}
+#else
+#define dump_section_relocs(ABFD,SEC,STREAM) (void)(ABFD,SEC,STREAM)
+#endif
- /*
- * From now on, we don't care about sub-segments.
- * Build one frag chain for each segment. Linked thru fr_next.
- * We know that there is at least 1 text frchain & at least 1 data
- * frchain.
- */
+#ifndef EMIT_SECTION_SYMBOLS
+#define EMIT_SECTION_SYMBOLS 1
+#endif
- remove_subsegs (frchain_root, SEG_TEXT, &text_frag_root, &text_last_frag);
- remove_subsegs (data0_frchainP, SEG_DATA, &data_frag_root, &data_last_frag);
- remove_subsegs (bss0_frchainP, SEG_BSS, &bss_frag_root, &bss_last_frag);
+static void
+adjust_reloc_syms (abfd, sec, xxx)
+ bfd *abfd;
+ asection *sec;
+ PTR xxx;
+{
+ segment_info_type *seginfo = seg_info (sec);
+ fixS *fixp;
- /*
- * We have two segments. If user gave -R flag, then we must put the
- * data frags into the text segment. Do this before relaxing so
- * we know to take advantage of -R and make shorter addresses.
- */
-#ifndef OBJ_AOUT
- if (flagseen['R'])
+ if (seginfo == NULL)
+ return;
+
+ dump_section_relocs (abfd, sec, stderr);
+
+ for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next)
+ if (fixp->fx_done)
+ /* ignore it */;
+ else if (fixp->fx_addsy)
+ {
+ symbolS *sym = fixp->fx_addsy;
+ asection *symsec = sym->bsym->section;
+
+ /* If it's one of these sections, assume the symbol is
+ definitely going to be output. The code in
+ md_estimate_size_before_relax in tc-mips.c uses this test
+ as well, so if you change this code you should look at that
+ code. */
+ if (symsec == &bfd_und_section
+ || symsec == &bfd_abs_section
+ || bfd_is_com_section (symsec))
+ {
+ fixp->fx_addsy->sy_used_in_reloc = 1;
+ continue;
+ }
+
+ /* Since we're reducing to section symbols, don't attempt to reduce
+ anything that's already using one. */
+ if (sym->bsym->flags & BSF_SECTION_SYM)
+ {
+ fixp->fx_addsy->sy_used_in_reloc = 1;
+ continue;
+ }
+
+ /* Is there some other reason we can't adjust this one? (E.g.,
+ call/bal links in i960-bout symbols.) */
+#ifdef obj_fix_adjustable
+ if (! obj_fix_adjustable (fixp))
+ {
+ fixp->fx_addsy->sy_used_in_reloc = 1;
+ continue;
+ }
+#endif
+
+ /* Is there some other (target cpu dependent) reason we can't adjust
+ this one? (E.g. relocations involving function addresses on
+ the PA. */
+#ifdef tc_fix_adjustable
+ if (! tc_fix_adjustable (fixp))
+ {
+ fixp->fx_addsy->sy_used_in_reloc = 1;
+ continue;
+ }
+#endif
+
+ /* If the section symbol isn't going to be output, the relocs
+ at least should still work. If not, figure out what to do
+ when we run into that case. */
+ fixp->fx_offset += S_GET_VALUE (sym);
+ if (sym->sy_frag)
+ fixp->fx_offset += sym->sy_frag->fr_address;
+ fixp->fx_addsy = section_symbol (symsec);
+ fixp->fx_addsy->sy_used_in_reloc = 1;
+ }
+#if 1/*def RELOC_REQUIRES_SYMBOL*/
+ else
+ {
+ /* There was no symbol required by this relocation. However,
+ BFD doesn't really handle relocations without symbols well.
+ (At least, the COFF support doesn't.) So for now we fake up
+ a local symbol in the absolute section. */
+
+ fixp->fx_addsy = section_symbol (absolute_section);
+ fixp->fx_addsy->sy_used_in_reloc = 1;
+ }
+#endif
+
+ dump_section_relocs (abfd, sec, stderr);
+}
+
+static void
+write_relocs (abfd, sec, xxx)
+ bfd *abfd;
+ asection *sec;
+ PTR xxx;
+{
+ segment_info_type *seginfo = seg_info (sec);
+ int i;
+ unsigned int n;
+ arelent **relocs;
+ fixS *fixp;
+ char *err;
+
+ /* If seginfo is NULL, we did not create this section; don't do
+ anything with it. */
+ if (seginfo == NULL)
+ return;
+
+ fixup_segment (seginfo->fix_root, sec);
+
+ n = 0;
+ for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next)
+ n++;
+
+#ifndef RELOC_EXPANSION_POSSIBLE
+ /* Set up reloc information as well. */
+ relocs = (arelent **) bfd_alloc_by_size_t (stdoutput,
+ n * sizeof (arelent *));
+ memset ((char*)relocs, 0, n * sizeof (arelent*));
+
+ i = 0;
+ for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next)
{
- fixS *tmp;
+ arelent *reloc;
+ char *data;
+ bfd_reloc_status_type s;
- text_last_frag->fr_next = data_frag_root;
- text_last_frag = data_last_frag;
- data_last_frag = NULL;
- data_frag_root = NULL;
- if (text_fix_root)
+ if (fixp->fx_done)
{
- for (tmp = text_fix_root; tmp->fx_next; tmp = tmp->fx_next);;
- tmp->fx_next = data_fix_root;
- text_fix_tail = data_fix_tail;
+ n--;
+ continue;
}
- else
- text_fix_root = data_fix_root;
- data_fix_root = NULL;
+ reloc = tc_gen_reloc (sec, fixp);
+ if (!reloc)
+ {
+ n--;
+ continue;
+ }
+ data = fixp->fx_frag->fr_literal + fixp->fx_where;
+ if (fixp->fx_where + fixp->fx_size
+ > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset)
+ abort ();
+
+ if (reloc->howto->partial_inplace == false
+ && reloc->howto->pcrel_offset == true
+ && reloc->howto->pc_relative == true)
+ {
+ /* bfd_perform_relocation screws this up */
+ reloc->addend += reloc->address;
+ }
+ /* Pass bogus address so that when bfd_perform_relocation adds
+ `reloc->address' back in, it'll come up with `data', which is where
+ we want it to operate. We can't just do it by fudging reloc->address,
+ since that might be used in the calculations(?). */
+ s = bfd_perform_relocation (stdoutput, reloc, data - reloc->address,
+ sec, stdoutput, &err);
+ switch (s)
+ {
+ case bfd_reloc_ok:
+ break;
+ case bfd_reloc_overflow:
+ as_bad_where (fixp->fx_file, fixp->fx_line, "relocation overflow");
+ break;
+ default:
+ as_fatal ("bad return from bfd_perform_relocation");
+ }
+ relocs[i++] = reloc;
}
+#else
+ n = n * MAX_RELOC_EXPANSION;
+ /* Set up reloc information as well. */
+ relocs = (arelent **) bfd_alloc_by_size_t (stdoutput,
+ n * sizeof (arelent *));
+
+ i = 0;
+ for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next)
+ {
+ arelent **reloc;
+ char *data;
+ bfd_reloc_status_type s;
+ int j;
+
+ if (fixp->fx_done)
+ {
+ n--;
+ continue;
+ }
+ reloc = tc_gen_reloc (sec, fixp);
+
+ for (j = 0; reloc[j]; j++)
+ {
+ relocs[i++] = reloc[j];
+ assert(i <= n);
+ }
+ data = fixp->fx_frag->fr_literal + fixp->fx_where;
+ if (fixp->fx_where + fixp->fx_size
+ > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset)
+ abort ();
+ for (j = 0; reloc[j]; j++)
+ {
+ s = bfd_perform_relocation (stdoutput, reloc[j],
+ data - reloc[0]->address,
+ sec, stdoutput, &err);
+ switch (s)
+ {
+ case bfd_reloc_ok:
+ break;
+ default:
+ as_fatal ("bad return from bfd_perform_relocation");
+ }
+ }
+ }
+ n = i;
+#endif
+
+#ifdef DEBUG4
+ {
+ int i, j, nsyms;
+ asymbol **sympp;
+ sympp = bfd_get_outsymbols (stdoutput);
+ nsyms = bfd_get_symcount (stdoutput);
+ for (i = 0; i < n; i++)
+ if (((*relocs[i]->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0)
+ {
+ for (j = 0; j < nsyms; j++)
+ if (sympp[j] == *relocs[i]->sym_ptr_ptr)
+ break;
+ if (j == nsyms)
+ abort ();
+ }
+ }
+#endif
+
+ if (n)
+ bfd_set_reloc (stdoutput, sec, relocs, n);
+ else
+ bfd_set_section_flags (abfd, sec,
+ (bfd_get_section_flags (abfd, sec)
+ & (flagword) ~SEC_RELOC));
+
+#ifdef DEBUG3
+ {
+ int i;
+ arelent *r;
+ asymbol *s;
+ fprintf (stderr, "relocs for sec %s\n", sec->name);
+ for (i = 0; i < n; i++)
+ {
+ r = relocs[i];
+ s = *r->sym_ptr_ptr;
+ fprintf (stderr, " reloc %2d @%08x off %4x : sym %-10s addend %x\n",
+ i, r, r->address, s->name, r->addend);
+ }
+ }
#endif
+}
+
+static void
+write_contents (abfd, sec, xxx)
+ bfd *abfd;
+ asection *sec;
+ PTR xxx;
+{
+ segment_info_type *seginfo = seg_info (sec);
+ unsigned long offset = 0;
+ fragS *f;
+
+ /* Write out the frags. */
+ if (seginfo == NULL
+ || ! (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS))
+ return;
+
+ for (f = seginfo->frchainP->frch_root;
+ f;
+ f = f->fr_next)
+ {
+ int x;
+ unsigned long fill_size;
+ char *fill_literal;
+ long count;
+
+ assert (f->fr_type == rs_fill);
+ if (f->fr_fix)
+ {
+ x = bfd_set_section_contents (stdoutput, sec,
+ f->fr_literal, (file_ptr) offset,
+ (bfd_size_type) f->fr_fix);
+ if (x == false)
+ {
+ bfd_perror (stdoutput->filename);
+ as_perror ("FATAL: Can't write %s", stdoutput->filename);
+ exit (42);
+ }
+ offset += f->fr_fix;
+ }
+ fill_literal = f->fr_literal + f->fr_fix;
+ fill_size = f->fr_var;
+ count = f->fr_offset;
+ assert (count >= 0);
+ if (fill_size && count)
+ while (count--)
+ {
+ x = bfd_set_section_contents (stdoutput, sec,
+ fill_literal, (file_ptr) offset,
+ (bfd_size_type) fill_size);
+ if (x == false)
+ {
+ bfd_perror (stdoutput->filename);
+ as_perror ("FATAL: Can't write %s", stdoutput->filename);
+ exit (42);
+ }
+ offset += fill_size;
+ }
+ }
+}
+#endif
+
+#if defined(BFD_ASSEMBLER) || (!defined (BFD) && !defined(OBJ_AOUT))
+static void
+merge_data_into_text ()
+{
+#if defined(BFD_ASSEMBLER) || defined(MANY_SEGMENTS)
+ seg_info (text_section)->frchainP->frch_last->fr_next =
+ seg_info (data_section)->frchainP->frch_root;
+ seg_info (text_section)->frchainP->frch_last =
+ seg_info (data_section)->frchainP->frch_last;
+ seg_info (data_section)->frchainP = 0;
+#else
+ fixS *tmp;
+
+ text_last_frag->fr_next = data_frag_root;
+ text_last_frag = data_last_frag;
+ data_last_frag = NULL;
+ data_frag_root = NULL;
+ if (text_fix_root)
+ {
+ for (tmp = text_fix_root; tmp->fx_next; tmp = tmp->fx_next);;
+ tmp->fx_next = data_fix_root;
+ text_fix_tail = data_fix_tail;
+ }
+ else
+ text_fix_root = data_fix_root;
+ data_fix_root = NULL;
+#endif
+}
+#endif /* BFD_ASSEMBLER || (! BFD && ! OBJ_AOUT) */
+
+#if !defined (BFD_ASSEMBLER) && !defined (BFD)
+static void
+relax_and_size_all_segments ()
+{
+ fragS *fragP;
+
relax_segment (text_frag_root, SEG_TEXT);
relax_segment (data_frag_root, SEG_DATA);
relax_segment (bss_frag_root, SEG_BSS);
else
{
H_SET_DATA_SIZE (&headers, 0);
- data_siz = 0;
}
#ifdef OBJ_BOUT
bss_vma = RoundUp (bss_vma, 1 << section_alignment[SEG_BSS]);
bss_address_frag.fr_address = bss_vma;
}
-#else
+#else /* ! OBJ_BOUT */
bss_address_frag.fr_address = (H_GET_TEXT_SIZE (&headers) +
H_GET_DATA_SIZE (&headers));
+#endif /* ! OBJ_BOUT */
/* Slide all the frags */
if (bss_frag_root)
{
- relax_addressT slide = bss_address_frag.fr_address + local_bss_counter;
+ relax_addressT slide = bss_address_frag.fr_address;
for (fragP = bss_frag_root; fragP; fragP = fragP->fr_next)
{
} /* for each bss frag */
}
-#endif
if (bss_last_frag)
+ H_SET_BSS_SIZE (&headers,
+ bss_last_frag->fr_address - bss_frag_root->fr_address);
+ else
+ H_SET_BSS_SIZE (&headers, 0);
+}
+#endif /* ! BFD_ASSEMBLER && ! BFD */
+
+#if defined (BFD_ASSEMBLER) || !defined (BFD)
+
+#ifdef BFD_ASSEMBLER
+static void
+set_symtab ()
+{
+ int nsyms;
+ asymbol **asympp;
+ symbolS *symp;
+ boolean result;
+ extern PTR bfd_alloc PARAMS ((bfd *, size_t));
+
+ /* Count symbols. We can't rely on a count made by the loop in
+ write_object_file, because *_frob_file may add a new symbol or
+ two. */
+ nsyms = 0;
+ for (symp = symbol_rootP; symp; symp = symbol_next (symp))
+ nsyms++;
+
+ if (nsyms)
+ {
+ int i;
+
+ asympp = (asymbol **) bfd_alloc (stdoutput,
+ nsyms * sizeof (asymbol *));
+ symp = symbol_rootP;
+ for (i = 0; i < nsyms; i++, symp = symbol_next (symp))
+ {
+ asympp[i] = symp->bsym;
+ symp->written = 1;
+ }
+ }
+ else
+ asympp = 0;
+ result = bfd_set_symtab (stdoutput, asympp, nsyms);
+ assert (result == true);
+ symbol_table_frozen = 1;
+}
+#endif
+
+void
+write_object_file ()
+{
+ struct frchain *frchainP; /* Track along all frchains. */
+#if ! defined (BFD_ASSEMBLER) || ! defined (WORKING_DOT_WORD)
+ fragS *fragP; /* Track along all frags. */
+#endif
+
+ /* Do we really want to write it? */
+ {
+ int n_warns, n_errs;
+ n_warns = had_warnings ();
+ n_errs = had_errors ();
+ /* The -Z flag indicates that an object file should be generated,
+ regardless of warnings and errors. */
+ if (flag_always_generate_output)
+ {
+ if (n_warns || n_errs)
+ as_warn ("%d error%s, %d warning%s, generating bad object file.\n",
+ n_errs, n_errs == 1 ? "" : "s",
+ n_warns, n_warns == 1 ? "" : "s");
+ }
+ else
+ {
+ if (n_errs)
+ as_fatal ("%d error%s, %d warning%s, no object file generated.\n",
+ n_errs, n_errs == 1 ? "" : "s",
+ n_warns, n_warns == 1 ? "" : "s");
+ }
+ }
+
+#ifdef OBJ_VMS
+ /* Under VMS we try to be compatible with VAX-11 "C". Thus, we call
+ a routine to check for the definition of the procedure "_main",
+ and if so -- fix it up so that it can be program entry point. */
+ VMS_Check_For_Main ();
+#endif /* VMS */
+
+ /* After every sub-segment, we fake an ".align ...". This conforms to
+ BSD4.2 brane-damage. We then fake ".fill 0" because that is the kind of
+ frag that requires least thought. ".align" frags like to have a
+ following frag since that makes calculating their intended length
+ trivial.
+
+ @@ Is this really necessary?? */
+#ifndef SUB_SEGMENT_ALIGN
+#ifdef BFD_ASSEMBLER
+#define SUB_SEGMENT_ALIGN(SEG) (0)
+#else
+#define SUB_SEGMENT_ALIGN(SEG) (2)
+#endif
+#endif
+ for (frchainP = frchain_root; frchainP; frchainP = frchainP->frch_next)
{
- local_bss_counter += bss_last_frag->fr_address - bss_frag_root->fr_address;
+ subseg_set (frchainP->frch_seg, frchainP->frch_subseg);
+ frag_align (SUB_SEGMENT_ALIGN (now_seg), NOP_OPCODE);
+ /* frag_align will have left a new frag.
+ Use this last frag for an empty ".fill".
+
+ For this segment ...
+ Create a last frag. Do not leave a "being filled in frag". */
+ frag_wane (frag_now);
+ frag_now->fr_fix = 0;
+ know (frag_now->fr_next == NULL);
}
- H_SET_BSS_SIZE (&headers, local_bss_counter);
+ /* From now on, we don't care about sub-segments. Build one frag chain
+ for each segment. Linked thru fr_next. */
+
+#ifdef BFD_ASSEMBLER
+ /* Remove the sections created by gas for its own purposes. */
+ {
+ asection **seclist, *sec;
+ seclist = &stdoutput->sections;
+ while (seclist && *seclist)
+ {
+ sec = *seclist;
+ while (sec == reg_section || sec == expr_section)
+ {
+ sec = sec->next;
+ *seclist = sec;
+ stdoutput->section_count--;
+ if (!sec)
+ break;
+ }
+ if (*seclist)
+ seclist = &(*seclist)->next;
+ }
+ }
+
+ bfd_map_over_sections (stdoutput, chain_frchains_together, (char *) 0);
+#else
+ remove_subsegs (frchain_root, SEG_TEXT, &text_frag_root, &text_last_frag);
+ remove_subsegs (data0_frchainP, SEG_DATA, &data_frag_root, &data_last_frag);
+ remove_subsegs (bss0_frchainP, SEG_BSS, &bss_frag_root, &bss_last_frag);
+#endif
+
+ /* We have two segments. If user gave -R flag, then we must put the
+ data frags into the text segment. Do this before relaxing so
+ we know to take advantage of -R and make shorter addresses. */
+#if !defined (OBJ_AOUT) || defined (BFD_ASSEMBLER)
+ if (flag_readonly_data_in_text)
+ {
+ merge_data_into_text ();
+ }
+#endif
+
+#ifdef BFD_ASSEMBLER
+ bfd_map_over_sections (stdoutput, relax_and_size_seg, (char *) 0);
+#else
+ relax_and_size_all_segments ();
+#endif /* BFD_ASSEMBLER */
+
+#ifndef BFD_ASSEMBLER
/*
*
* Crawl the symbol chain.
* Assign a symbol number to each symbol.
* Count the number of string-table chars we will emit.
* Put this info into the headers as appropriate.
- *
- */
- know (zero_address_frag.fr_address == 0);
- string_byte_count = sizeof (string_byte_count);
-
- obj_crawl_symbol_chain (&headers);
-
- if (string_byte_count == sizeof (string_byte_count))
- {
- string_byte_count = 0;
- } /* if no strings, then no count. */
-
- H_SET_STRING_SIZE (&headers, string_byte_count);
-
- /*
- * Addresses of frags now reflect addresses we use in the object file.
- * Symbol values are correct.
- * Scan the frags, converting any ".org"s and ".align"s to ".fill"s.
- * Also converting any machine-dependent frags using md_convert_frag();
- */
- subseg_change (SEG_TEXT, 0);
-
- for (fragP = text_frag_root; fragP; fragP = fragP->fr_next)
- {
- switch (fragP->fr_type)
- {
- case rs_align:
- case rs_org:
-#ifdef HANDLE_ALIGN
- HANDLE_ALIGN (fragP);
-#endif
- fragP->fr_type = rs_fill;
- know (fragP->fr_var == 1);
- know (fragP->fr_next != NULL);
-
- fragP->fr_offset = (fragP->fr_next->fr_address
- - fragP->fr_address
- - fragP->fr_fix);
- break;
-
- case rs_fill:
- break;
-
- case rs_machine_dependent:
- md_convert_frag (&headers, fragP);
+ *
+ */
+ know (zero_address_frag.fr_address == 0);
+ string_byte_count = sizeof (string_byte_count);
- know ((fragP->fr_next == NULL) || ((fragP->fr_next->fr_address - fragP->fr_address) == fragP->fr_fix));
+ obj_crawl_symbol_chain (&headers);
- /*
- * After md_convert_frag, we make the frag into a ".space 0".
- * Md_convert_frag() should set up any fixSs and constants
- * required.
- */
- frag_wane (fragP);
- break;
+ if (string_byte_count == sizeof (string_byte_count))
+ string_byte_count = 0;
-#ifndef WORKING_DOT_WORD
- case rs_broken_word:
- {
- struct broken_word *lie;
- extern md_short_jump_size;
- extern md_long_jump_size;
+ H_SET_STRING_SIZE (&headers, string_byte_count);
- if (fragP->fr_subtype)
- {
- fragP->fr_fix += md_short_jump_size;
- for (lie = (struct broken_word *) (fragP->fr_symbol); lie && lie->dispfrag == fragP; lie = lie->next_broken_word)
- if (lie->added == 1)
- fragP->fr_fix += md_long_jump_size;
- }
- frag_wane (fragP);
- }
- break;
-#endif
+ /*
+ * Addresses of frags now reflect addresses we use in the object file.
+ * Symbol values are correct.
+ * Scan the frags, converting any ".org"s and ".align"s to ".fill"s.
+ * Also converting any machine-dependent frags using md_convert_frag();
+ */
+ subseg_change (SEG_TEXT, 0);
- default:
- BAD_CASE (fragP->fr_type);
- break;
- } /* switch (fr_type) */
+ for (fragP = text_frag_root; fragP; fragP = fragP->fr_next)
+ {
+ cvt_frag_to_fill (&headers, fragP);
- if (!((fragP->fr_next == NULL)
+ /* Some assert macros don't work with # directives mixed in. */
+#ifndef NDEBUG
+ if (!(fragP->fr_next == NULL
#ifdef OBJ_BOUT
- || (fragP->fr_next == data_frag_root)
+ || fragP->fr_next == data_frag_root
#endif
|| ((fragP->fr_next->fr_address - fragP->fr_address)
- == (fragP->fr_fix + (fragP->fr_offset * fragP->fr_var)))))
- {
- fprintf (stderr, "assertion failed: file `%s', line %d\n",
- __FILE__, __LINE__ - 4);
- exit (1);
- }
- } /* for each frag. */
+ == (fragP->fr_fix + fragP->fr_offset * fragP->fr_var))))
+ abort ();
+#endif
+ }
+#endif /* ! BFD_ASSEMBLER */
#ifndef WORKING_DOT_WORD
{
for (lie = broken_words; lie; lie = lie->next_broken_word)
if (!lie->added)
{
+ expressionS exp;
+
+ exp.X_op = O_subtract;
+ exp.X_add_symbol = lie->add;
+ exp.X_op_symbol = lie->sub;
+ exp.X_add_number = lie->addnum;
+#ifdef BFD_ASSEMBLER
+ fix_new_exp (lie->frag,
+ lie->word_goes_here - lie->frag->fr_literal,
+ 2, &exp, 0, BFD_RELOC_NONE);
+#else
+#if defined(TC_SPARC) || defined(TC_A29K) || defined(NEED_FX_R_TYPE)
+ fix_new_exp (lie->frag,
+ lie->word_goes_here - lie->frag->fr_literal,
+ 2, &exp, 0, NO_RELOC);
+#else
#ifdef TC_NS32K
- fix_new_ns32k (lie->frag,
- lie->word_goes_here - lie->frag->fr_literal,
- 2,
- lie->add,
- lie->sub,
- lie->addnum,
- 0, 0, 2, 0, 0);
+ fix_new_ns32k_exp (lie->frag,
+ lie->word_goes_here - lie->frag->fr_literal,
+ 2, &exp, 0, 0, 2, 0, 0);
#else
-# if defined(TC_SPARC) || defined(TC_A29K) || defined(NEED_FX_R_TYPE)
- fix_new (lie->frag, lie->word_goes_here - lie->frag->fr_literal,
- 2, lie->add,
- lie->sub, lie->addnum,
- 0, NO_RELOC);
-# else
- fix_new (lie->frag, lie->word_goes_here - lie->frag->fr_literal,
- 2, lie->add,
- lie->sub, lie->addnum,
- 0, 0);
-
-# endif /* tc_sparc|tc_a29k|need_fx_r_type */
+ fix_new_exp (lie->frag,
+ lie->word_goes_here - lie->frag->fr_literal,
+ 2, &exp, 0, 0);
#endif /* TC_NS32K */
- /* md_number_to_chars(lie->word_goes_here,
- S_GET_VALUE(lie->add)
- + lie->addnum
- - S_GET_VALUE(lie->sub),
- 2); */
+#endif /* TC_SPARC|TC_A29K|NEED_FX_R_TYPE */
+#endif /* BFD_ASSEMBLER */
*prevP = lie->next_broken_word;
}
else
{
struct broken_word *untruth;
char *table_ptr;
- long table_addr;
- long from_addr, to_addr;
+ addressT table_addr;
+ addressT from_addr, to_addr;
int n, m;
- extern md_short_jump_size;
- extern md_long_jump_size;
-
fragP = lie->dispfrag;
- /* Find out how many broken_words go here */
+ /* Find out how many broken_words go here. */
n = 0;
for (untruth = lie; untruth && untruth->dispfrag == fragP; untruth = untruth->next_broken_word)
if (untruth->added == 1)
table_ptr = lie->dispfrag->fr_opcode;
table_addr = lie->dispfrag->fr_address + (table_ptr - lie->dispfrag->fr_literal);
- /* Create the jump around the long jumps */
- /* This is a short jump from table_ptr+0 to table_ptr+n*long_jump_size */
+ /* Create the jump around the long jumps. This is a short
+ jump from table_ptr+0 to table_ptr+n*long_jump_size. */
from_addr = table_addr;
to_addr = table_addr + md_short_jump_size + n * md_long_jump_size;
md_create_short_jump (table_ptr, from_addr, to_addr, lie->dispfrag, lie->add);
continue;
/* Patch the jump table */
/* This is the offset from ??? to table_ptr+0 */
- to_addr = table_addr
- - S_GET_VALUE (lie->sub);
+ to_addr = table_addr - S_GET_VALUE (lie->sub);
md_number_to_chars (lie->word_goes_here, to_addr, 2);
for (untruth = lie->next_broken_word; untruth && untruth->dispfrag == fragP; untruth = untruth->next_broken_word)
{
}
#endif /* not WORKING_DOT_WORD */
+#ifndef BFD_ASSEMBLER
#ifndef OBJ_VMS
{ /* not vms */
+ long object_file_size;
/*
* Scan every FixS performing fixups. We had to wait until now to do
* this because md_convert_frag() may have made some fixSs.
int trsize, drsize;
subseg_change (SEG_TEXT, 0);
- trsize = md_reloc_size * fixup_segment (text_fix_root,
- SEG_TEXT);
+ trsize = md_reloc_size * fixup_segment (text_fix_root, SEG_TEXT);
subseg_change (SEG_DATA, 0);
- drsize = md_reloc_size * fixup_segment (data_fix_root,
- SEG_DATA);
+ drsize = md_reloc_size * fixup_segment (data_fix_root, SEG_DATA);
H_SET_RELOCATION_SIZE (&headers, trsize, drsize);
/* FIXME move this stuff into the pre-write-hook */
H_SET_ENTRY_POINT (&headers, 0);
obj_pre_write_hook (&headers); /* extra coff stuff */
- if ((had_warnings () && flagseen['Z'])
- || had_errors () > 0)
- {
- if (flagseen['Z'])
- {
- as_warn ("%d error%s, %d warning%s, generating bad object file.\n",
- had_errors (), had_errors () == 1 ? "" : "s",
- had_warnings (), had_warnings () == 1 ? "" : "s");
- }
- else
- {
- as_fatal ("%d error%s, %d warning%s, no object file generated.\n",
- had_errors (), had_errors () == 1 ? "" : "s",
- had_warnings (), had_warnings () == 1 ? "" : "s");
- } /* on want output */
- } /* on error condition */
object_file_size = H_GET_FILE_SIZE (&headers);
next_object_file_charP = the_object_file = xmalloc (object_file_size);
know ((next_object_file_charP - the_object_file) == H_GET_HEADER_SIZE (&headers));
/*
- * Emit code.
- */
+ * Emit code.
+ */
for (fragP = text_frag_root; fragP; fragP = fragP->fr_next)
{
register long count;
know ((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE (&headers) + H_GET_TEXT_SIZE (&headers) + H_GET_DATA_SIZE (&headers)));
/*
- * Emit relocations.
- */
+ * Emit relocations.
+ */
obj_emit_relocations (&next_object_file_charP, text_fix_root, (relax_addressT) 0);
know ((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE (&headers) + H_GET_TEXT_SIZE (&headers) + H_GET_DATA_SIZE (&headers) + H_GET_TEXT_RELOCATION_SIZE (&headers)));
#ifdef TC_I960
/* Make addresses in data relocation directives relative to beginning of
- * first data fragment, not end of last text fragment: alignment of the
- * start of the data segment may place a gap between the segments.
- */
+ * first data fragment, not end of last text fragment: alignment of the
+ * start of the data segment may place a gap between the segments.
+ */
obj_emit_relocations (&next_object_file_charP, data_fix_root, data0_frchainP->frch_root->fr_address);
#else /* TC_I960 */
obj_emit_relocations (&next_object_file_charP, data_fix_root, text_last_frag->fr_address);
know ((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE (&headers) + H_GET_TEXT_SIZE (&headers) + H_GET_DATA_SIZE (&headers) + H_GET_TEXT_RELOCATION_SIZE (&headers) + H_GET_DATA_RELOCATION_SIZE (&headers)));
/*
- * Emit line number entries.
- */
+ * Emit line number entries.
+ */
OBJ_EMIT_LINENO (&next_object_file_charP, lineno_rootP, the_object_file);
know ((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE (&headers) + H_GET_TEXT_SIZE (&headers) + H_GET_DATA_SIZE (&headers) + H_GET_TEXT_RELOCATION_SIZE (&headers) + H_GET_DATA_RELOCATION_SIZE (&headers) + H_GET_LINENO_SIZE (&headers)));
obj_emit_strings (&next_object_file_charP);
} /* only if we have a string table */
- /* know((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE(&headers) + H_GET_TEXT_SIZE(&headers) + H_GET_DATA_SIZE(&headers) + H_GET_TEXT_RELOCATION_SIZE(&headers) + H_GET_DATA_RELOCATION_SIZE(&headers) + H_GET_LINENO_SIZE(&headers) + H_GET_SYMBOL_TABLE_SIZE(&headers) + H_GET_STRING_SIZE(&headers)));
- */
- /* know(next_object_file_charP == the_object_file + object_file_size);*/
-
#ifdef BFD_HEADERS
bfd_seek (stdoutput, 0, 0);
bfd_write (the_object_file, 1, object_file_size, stdoutput);
/* Write the data to the file */
output_file_append (the_object_file, object_file_size, out_file_name);
#endif
-
- output_file_close (out_file_name);
} /* non vms output */
#else /* VMS */
/*
* Now do the VMS-dependent part of writing the object file
*/
- VMS_write_object_file (H_GET_TEXT_SIZE (&headers), data_siz,
+ VMS_write_object_file (H_GET_TEXT_SIZE (&headers),
+ H_GET_DATA_SIZE (&headers),
+ H_GET_BSS_SIZE (&headers),
text_frag_root, data_frag_root);
#endif /* VMS */
-} /* write_object_file() */
+#else /* BFD_ASSEMBLER */
-#else
+ bfd_map_over_sections (stdoutput, adjust_reloc_syms, (char *)0);
+
+ /* Set up symbol table, and write it out. */
+ if (symbol_rootP)
+ {
+ symbolS *symp;
+
+ for (symp = symbol_rootP; symp; symp = symbol_next (symp))
+ {
+ int punt = 0;
+
+ if (! symp->sy_resolved)
+ {
+ if (symp->sy_value.X_op == O_constant)
+ {
+ /* This is the normal case; skip the call. */
+ S_SET_VALUE (symp,
+ (S_GET_VALUE (symp)
+ + symp->sy_frag->fr_address));
+ symp->sy_resolved = 1;
+ }
+ else
+ resolve_symbol_value (symp);
+ }
+
+ /* So far, common symbols have been treated like undefined symbols.
+ Put them in the common section now. */
+ if (S_IS_DEFINED (symp) == 0
+ && S_GET_VALUE (symp) != 0)
+ S_SET_SEGMENT (symp, &bfd_com_section);
+#if 0
+ printf ("symbol `%s'\n\t@%x: value=%d flags=%x seg=%s\n",
+ S_GET_NAME (symp), symp,
+ S_GET_VALUE (symp),
+ symp->bsym->flags,
+ segment_name (symp->bsym->section));
+#endif
+
+#ifdef obj_frob_symbol
+ obj_frob_symbol (symp, punt);
+#endif
+#ifdef tc_frob_symbol
+ if (! punt || symp->sy_used_in_reloc)
+ tc_frob_symbol (symp, punt);
+#endif
+
+ /* If we don't want to keep this symbol, splice it out of
+ the chain now. If EMIT_SECTION_SYMBOLS is 0, we never
+ want section symbols. Otherwise, we skip local symbols
+ and symbols that the frob_symbol macros told us to punt,
+ but we keep such symbols if they are used in relocs. */
+ if ((! EMIT_SECTION_SYMBOLS
+ && (symp->bsym->flags & BSF_SECTION_SYM) != 0)
+ /* Note that S_IS_EXTERN and S_IS_LOCAL are not always
+ opposites. Sometimes the former checks flags and the
+ latter examines the name... */
+ || (!S_IS_EXTERN (symp)
+ && (S_IS_LOCAL (symp) || punt)
+ && ! symp->sy_used_in_reloc))
+ {
+ symbol_remove (symp, &symbol_rootP, &symbol_lastP);
+ /* After symbol_remove, symbol_next(symp) still returns
+ the one that came after it in the chain. So we don't
+ need to do any extra cleanup work here. */
+
+ continue;
+ }
+
+ /* Make sure we really got a value for the symbol. */
+ if (! symp->sy_resolved)
+ {
+ as_bad ("can't resolve value for symbol \"%s\"",
+ S_GET_NAME (symp));
+ symp->sy_resolved = 1;
+ }
+
+ /* Set the value into the BFD symbol. Up til now the value
+ has only been kept in the gas symbolS struct. */
+ symp->bsym->value = S_GET_VALUE (symp);
+ }
+ }
+
+ /* Now do any format-specific adjustments to the symbol table, such
+ as adding file symbols. */
+#ifdef obj_adjust_symtab
+ obj_adjust_symtab ();
+#endif
+
+ /* Now that all the sizes are known, and contents correct, we can
+ start writing to the file. */
+ set_symtab ();
+
+ /* If *_frob_file changes the symbol value at this point, it is
+ responsible for moving the changed value into symp->bsym->value
+ as well. Hopefully all symbol value changing can be done in
+ *_frob_symbol. */
+#ifdef tc_frob_file
+ tc_frob_file ();
#endif
+#ifdef obj_frob_file
+ obj_frob_file ();
+#endif
+
+ bfd_map_over_sections (stdoutput, write_relocs, (char *) 0);
+
+ bfd_map_over_sections (stdoutput, write_contents, (char *) 0);
+#endif /* BFD_ASSEMBLER */
+}
+#endif /* ! BFD */
/*
* relax_segment()
* these frag addresses may not be the same as final object-file addresses.
*/
+#ifndef md_relax_frag
+
+/* Subroutines of relax_segment. */
+static int
+is_dnrange (f1, f2)
+ struct frag *f1;
+ struct frag *f2;
+{
+ for (; f1; f1 = f1->fr_next)
+ if (f1->fr_next == f2)
+ return 1;
+ return 0;
+}
+
+#endif /* ! defined (md_relax_frag) */
+
+/* Relax_align. Advance location counter to next address that has 'alignment'
+ lowest order bits all 0s, return size of adjustment made. */
+static relax_addressT
+relax_align (address, alignment)
+ register relax_addressT address; /* Address now. */
+ register int alignment; /* Alignment (binary). */
+{
+ relax_addressT mask;
+ relax_addressT new_address;
+ mask = ~((~0) << alignment);
+ new_address = (address + mask) & (~mask);
+ if (linkrelax)
+ /* We must provide lots of padding, so the linker can discard it
+ when needed. The linker will not add extra space, ever. */
+ new_address += (1 << alignment);
+ return (new_address - address);
+}
void
relax_segment (segment_frag_root, segment)
struct frag *segment_frag_root;
- segT segment; /* SEG_DATA or SEG_TEXT */
+ segT segment;
{
register struct frag *fragP;
register relax_addressT address;
-#ifndef MANY_SEGMENTS
+#if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER)
know (segment == SEG_DATA || segment == SEG_TEXT || segment == SEG_BSS);
#endif
/* In case md_estimate_size_before_relax() wants to make fixSs. */
break;
case rs_align:
- address += relax_align (address, fragP->fr_offset);
+ {
+ int offset = relax_align (address, (int) fragP->fr_offset);
+ if (offset % fragP->fr_var != 0)
+ {
+ as_bad ("alignment padding (%d bytes) not a multiple of %ld",
+ offset, (long) fragP->fr_var);
+ offset -= (offset % fragP->fr_var);
+ }
+ address += offset;
+ }
break;
case rs_org:
symbolS *symbolP;
long target;
long after;
- long aim;
was_address = fragP->fr_address;
address = fragP->fr_address += stretch;
{
struct broken_word *lie;
struct broken_word *untruth;
- extern int md_short_jump_size;
- extern int md_long_jump_size;
/* Yes this is ugly (storing the broken_word pointer
in the symbol slot). Still, this whole chunk of
+ S_GET_VALUE (lie->sub)));
if (offset <= -32768 || offset >= 32767)
{
- if (flagseen['K'])
- as_warn (".word %s-%s+%ld didn't fit",
- S_GET_NAME (lie->add),
- S_GET_NAME (lie->sub),
- lie->addnum);
+ if (flag_warn_displacement)
+ {
+ char buf[50];
+ sprint_value (buf, (addressT) lie->addnum);
+ as_warn (".word %s-%s+%s didn't fit",
+ S_GET_NAME (lie->add),
+ S_GET_NAME (lie->sub),
+ buf);
+ }
lie->added = 1;
if (fragP->fr_subtype == 0)
{
} /* case rs_broken_word */
#endif
case rs_align:
- growth = (relax_align ((relax_addressT) (address + fragP->fr_fix), offset)
- - relax_align ((relax_addressT) (was_address + fragP->fr_fix), offset));
+ growth = (relax_align ((relax_addressT) (address
+ + fragP->fr_fix),
+ (int) offset)
+ - relax_align ((relax_addressT) (was_address
+ + fragP->fr_fix),
+ (int) offset));
break;
case rs_org:
if (symbolP)
{
-#ifdef MANY_SEGMENTS
-#else
- know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) || (S_GET_SEGMENT (symbolP) == SEG_DATA) || (S_GET_SEGMENT (symbolP) == SEG_TEXT) || S_GET_SEGMENT (symbolP) == SEG_BSS);
+#if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER)
+ know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE)
+ || (S_GET_SEGMENT (symbolP) == SEG_DATA)
+ || (S_GET_SEGMENT (symbolP) == SEG_TEXT)
+ || S_GET_SEGMENT (symbolP) == SEG_BSS);
know (symbolP->sy_frag);
- know (!(S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) || (symbolP->sy_frag == &zero_address_frag));
+ know (!(S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE)
+ || (symbolP->sy_frag == &zero_address_frag));
#endif
target += S_GET_VALUE (symbolP)
+ symbolP->sy_frag->fr_address;
know (fragP->fr_next);
after = fragP->fr_next->fr_address;
growth = ((target - after) > 0) ? (target - after) : 0;
- /* Growth may be -ve, but variable part of frag cannot have
- fewer than 0 chars. That is, we can't .org backwards. */
+ /* Growth may be negative, but variable part of frag
+ cannot have fewer than 0 chars. That is, we can't
+ .org backwards. */
growth -= stretch; /* This is an absolute growth factor */
break;
case rs_machine_dependent:
+#ifdef md_relax_frag
+ growth = md_relax_frag (fragP, stretch);
+#else
+ /* The default way to relax a frag is to look through
+ md_relax_table. */
{
const relax_typeS *this_type;
const relax_typeS *start_type;
relax_substateT next_state;
relax_substateT this_state;
+ long aim;
this_state = fragP->fr_subtype;
start_type = this_type = md_relax_table + this_state;
if (symbolP)
{
-#ifndef MANY_SEGMENTS
- know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) || (S_GET_SEGMENT (symbolP) == SEG_DATA) || (S_GET_SEGMENT (symbolP) == SEG_BSS) || (S_GET_SEGMENT (symbolP) == SEG_TEXT));
+#ifndef DIFF_EXPR_OK
+#if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER)
+ know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE)
+ || (S_GET_SEGMENT (symbolP) == SEG_DATA)
+ || (S_GET_SEGMENT (symbolP) == SEG_BSS)
+ || (S_GET_SEGMENT (symbolP) == SEG_TEXT));
#endif
know (symbolP->sy_frag);
- know (!(S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE) || symbolP->sy_frag == &zero_address_frag);
+#endif
+ know (!(S_GET_SEGMENT (symbolP) == absolute_section)
+ || symbolP->sy_frag == &zero_address_frag);
target +=
S_GET_VALUE (symbolP)
+ symbolP->sy_frag->fr_address;
/* If frag has yet to be reached on this pass,
assume it will move by STRETCH just as we did.
If this is not so, it will be because some frag
- between grows, and that will force another pass. */
-
- /* JF was just address */
- /* JF also added is_dnrange hack */
- /* There's gotta be a better/faster/etc way
- to do this. . . */
- because I ran into a zero-length frag (fr_fix=0)
- which was created when the obstack needed a new
- chunk JUST AFTER the opcode of a branch. Since
- fr_fix is zero, fr_address of this frag is the same
- as fr_address of the next frag. This
- zero-length frag was variable and jumped to .+2
- (in the next frag), but since the > comparison
- below failed (the two were =, not >), "stretch"
- was not added to the target. Stretch was 178, so
- the offset appeared to be .-176 instead, which did
- not fit into a byte branch, so the assembler
- relaxed the branch to a word. This didn't compare
- with what happened when the same source file was
- assembled on other machines, which is how I found it.
- You might want to think about what other places have
- trouble with zero length frags... */
+ between grows, and that will force another pass.
+
+ Beware zero-length frags.
+
+ There should be a faster way to do this. */
if (symbolP->sy_frag->fr_address >= was_address
&& is_dnrange (fragP, symbolP->sy_frag))
{
target += stretch;
}
- } /* if there's a symbol attached */
+ }
aim = target - address - fragP->fr_fix;
/* The displacement is affected by the instruction size
to add fragP->fr_pcrel_adjust in all cases (it should be
zero if not used), but just in case it breaks something
else we'll put this inside #ifdef NS32K ... #endif */
-#ifdef TC_NS32K
+#ifndef TC_NS32K
+ if (fragP->fr_pcrel_adjust)
+ abort ();
+#endif
aim += fragP->fr_pcrel_adjust;
-#endif /* TC_NS32K */
if (aim < 0)
{
if (growth != 0)
fragP->fr_subtype = this_state;
}
+#endif
break;
default:
*/
} /* relax_segment() */
-/*
- * Relax_align. Advance location counter to next address that has 'alignment'
- * lowest order bits all 0s.
- */
-
-/* How many addresses does the .align take? */
-static relax_addressT
-relax_align (address, alignment)
- register relax_addressT address; /* Address now. */
- register long alignment; /* Alignment (binary). */
-{
- relax_addressT mask;
- relax_addressT new_address;
-
- mask = ~((~0) << alignment);
- new_address = (address + mask) & (~mask);
- if (linkrelax)
- /* We must provide lots of padding, so the linker can discard it
- when needed. The linker will not add extra space, ever. */
- new_address += (1 << alignment);
- return (new_address - address);
-} /* relax_align() */
+#if defined (BFD_ASSEMBLER) || !defined (BFD)
/* fixup_segment()
register fixS *fixP;
segT this_segment_type; /* N_TYPE bits for segment. */
{
- register long seg_reloc_count;
- 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;
-
- /* FIXME: remove this line *//* fixS *orig = fixP; */
- seg_reloc_count = 0;
-#ifdef TC_I960
- /* If the linker is doing the relaxing, we must not do any fixups */
+ long seg_reloc_count = 0;
+ symbolS *add_symbolP;
+ symbolS *sub_symbolP;
+ valueT add_number;
+ int size;
+ char *place;
+ long where;
+ char pcrel;
+ 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)
{
for (; fixP; fixP = fixP->fx_next)
- {
- seg_reloc_count++;
- }
+ seg_reloc_count++;
+ TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count);
+ return seg_reloc_count;
}
- else
-#endif
- for (; 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 */
+ for (; 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_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;
-
- 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 */
-
+ 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 (sub_symbolP)
+ {
+ if (!add_symbolP)
+ {
+ /* Its just -sym */
+ if (S_GET_SEGMENT (sub_symbolP) == absolute_section)
add_number -= S_GET_VALUE (sub_symbolP);
-
- /* 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. */
+ 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)
+ || (add_symbol_segment == absolute_section)))
+ {
+ /* 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");
- }
+ /* 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_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)));
+ add_symbolP = NULL;
- 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 */
+ /* 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;
+ }
+ }
+ 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);
- 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 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 (fixP)
+ - S_GET_VALUE (sub_symbolP));
+ pcrel = 1;
+ fixP->fx_pcrel = 1;
+ sub_symbolP = 0;
+ fixP->fx_subsy = 0;
+ }
+#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,
+ "Can't emit reloc {- %s-seg symbol \"%s\"} @ file address %s.",
+ segment_name (S_GET_SEGMENT (sub_symbolP)),
+ S_GET_NAME (sub_symbolP), buf);
+ }
+ }
+ }
+
+ 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);
+ /* 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);
- pcrel = 0; /* Lie. Don't want further pcrel processing. */
- fixP->fx_addsy = NULL; /* No relocations please. */
- }
- else
- {
- switch (add_symbol_segment)
- {
- case SEG_ABSOLUTE:
+ add_number += S_GET_VALUE (add_symbolP);
+ add_number -= md_pcrel_from (fixP);
+ pcrel = 0; /* Lie. Don't want 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 (fixP))
+ {
+ fixP->fx_pcrel = 0;
+ fixP->fx_addsy = NULL;
+ }
+ }
+ else
+ {
+ if (add_symbol_segment == absolute_section)
+ {
#ifdef TC_I960
- reloc_callj (fixP); /* See comment about reloc_callj() above*/
+ /* See comment about reloc_callj() above. */
+ reloc_callj (fixP);
#endif /* TC_I960 */
- add_number += S_GET_VALUE (add_symbolP);
- fixP->fx_addsy = NULL;
- add_symbolP = NULL;
- break;
- default:
- seg_reloc_count++;
- add_number += S_GET_VALUE (add_symbolP);
- break;
+ add_number += S_GET_VALUE (add_symbolP);
- case SEG_UNKNOWN:
+ /* 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 ("can't use COBR format with external label");
- fixP->fx_addsy = NULL; /* No relocations please. */
- continue;
- } /* COBR */
+ 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);
+ if (S_IS_COMMON (add_symbolP))
+ add_number += S_GET_VALUE (add_symbolP);
#endif /* TE_I386AIX */
#endif /* OBJ_COFF */
- ++seg_reloc_count;
-
- break;
-
-
- } /* switch on symbol seg */
- } /* if not in local seg */
- } /* if there was a + symbol */
+ ++seg_reloc_count;
+ }
+ else
+ {
+ seg_reloc_count++;
+ add_number += S_GET_VALUE (add_symbolP);
+ }
+ }
+ }
- if (pcrel)
- {
- add_number -= md_pcrel_from (fixP);
- if (add_symbolP == 0)
- {
- fixP->fx_addsy = &abs_symbol;
- ++seg_reloc_count;
- } /* if there's an add_symbol */
- } /* if pcrel */
+ if (pcrel)
+ {
+ add_number -= md_pcrel_from (fixP);
+ if (add_symbolP == 0)
+ {
+#ifndef BFD_ASSEMBLER
+ fixP->fx_addsy = &abs_symbol;
+#else
+ fixP->fx_addsy = section_symbol (absolute_section);
+#endif
+ fixP->fx_addsy->sy_used_in_reloc = 1;
+ ++seg_reloc_count;
+ }
+ }
- 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 */
+ if (!fixP->fx_bit_fixP && size > 0)
+ {
+ valueT mask = 0;
+ if (size < sizeof (mask))
+ {
+ /* set all bits to one */
+ mask--;
+ /* Technically, combining these produces an undefined result
+ if size is sizeof (valueT), though I think these two
+ half-way operations should both be defined. And the
+ compiler should be able to combine them if it's valid on
+ the host architecture. */
+ mask <<= size * 4;
+ mask <<= size * 4;
+ 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 (!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 */
-
- md_apply_fix (fixP, add_number);
- } /* For each fixS in this segment. */
+ /* 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 OBJ_COFF
-#ifdef TC_I960
- {
- fixS *topP = fixP;
+ if (!fixP->fx_done)
+ {
+#ifdef BFD_ASSEMBLER
+ md_apply_fix (fixP, &add_number);
+#else
+ md_apply_fix (fixP, add_number);
+#endif
- /* two relocs per callj under coff. */
- for (fixP = topP; fixP; fixP = fixP->fx_next)
- {
- if (fixP->fx_callj && fixP->fx_addsy != 0)
- {
- ++seg_reloc_count;
- } /* if callj and not already fixed. */
- } /* for each fix */
- }
-#endif /* TC_I960 */
+#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
+ }
+#ifdef TC_VALIDATE_FIX
+ skip:
+#endif
+ ;
+ } /* For each fixS in this segment. */
-#endif /* OBJ_COFF */
- return (seg_reloc_count);
-} /* fixup_segment() */
+ TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count);
+ return seg_reloc_count;
+}
+#endif /* defined (BFD_ASSEMBLER) || !defined (BFD) */
-static int
-is_dnrange (f1, f2)
- struct frag *f1;
- struct frag *f2;
+void
+number_to_chars_bigendian (buf, val, n)
+ char *buf;
+ valueT val;
+ int n;
{
- while (f1)
+ if (n > sizeof (val)|| n <= 0)
+ abort ();
+ while (n--)
{
- if (f1->fr_next == f2)
- return 1;
- f1 = f1->fr_next;
+ buf[n] = val & 0xff;
+ val >>= 8;
}
- return 0;
-} /* is_dnrange() */
+}
-/* Append a string onto another string, bumping the pointer along. */
void
-append (charPP, fromP, length)
- char **charPP;
- char *fromP;
- unsigned long length;
+number_to_chars_littleendian (buf, val, n)
+ char *buf;
+ valueT val;
+ int n;
{
- if (length)
- { /* Don't trust memcpy() of 0 chars. */
- memcpy (*charPP, fromP, (int) length);
- *charPP += length;
+ if (n > sizeof (val) || n <= 0)
+ abort ();
+ while (n--)
+ {
+ *buf++ = val & 0xff;
+ val >>= 8;
}
}
-int section_alignment[SEG_MAXIMUM_ORDINAL];
-
-/*
- * This routine records the largest alignment seen for each segment.
- * If the beginning of the segment is aligned on the worst-case
- * boundary, all of the other alignments within it will work. At
- * least one object format really uses this info.
- */
-void
-record_alignment (seg, align)
- segT seg; /* Segment to which alignment pertains */
- int align; /* Alignment, as a power of 2
- * (e.g., 1 => 2-byte boundary, 2 => 4-byte boundary, etc.)
- */
-{
-
- if (align > section_alignment[(int) seg])
- {
- section_alignment[(int) seg] = align;
- } /* if highest yet */
-
- return;
-} /* record_alignment() */
-
/* end of write.c */
projects / binutils.git / blobdiff