/* write.c - emit .o file
- Copyright (C) 1986, 1987, 1990, 1991, 1992, 1993 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"
+/* This looks like a good idea. Let's try turning it on always, for now. */
+#undef BFD_FAST_SECTION_FILL
+#define BFD_FAST_SECTION_FILL
+
/* 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
extern CONST int md_long_jump_size;
#endif
+int symbol_table_frozen;
+void print_fixup PARAMS ((fixS *));
+
+#ifdef BFD_ASSEMBLER
+static void renumber_sections PARAMS ((bfd *, asection *, PTR));
+
+/* 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
static struct frag *bss_last_frag; /* Last frag in segment. */
#endif
-#if ! defined (BFD_ASSEMBLER) && ! defined (BFD)
+#ifndef BFD
static object_headers headers;
static char *the_object_file;
#endif
fixP->fx_subsy = sub_symbol;
fixP->fx_offset = offset;
fixP->fx_pcrel = pcrel;
+ fixP->fx_plt = 0;
#if defined(NEED_FX_R_TYPE) || defined (BFD_ASSEMBLER)
fixP->fx_r_type = r_type;
#endif
fixP->fx_addnumber = 0;
fixP->tc_fix_data = NULL;
fixP->fx_tcbit = 0;
+ fixP->fx_done = 0;
-#ifdef TC_something
+#if defined (TC_I960) || defined (TC_NS32K)
fixP->fx_bsr = 0;
#endif
{
#ifdef BFD_ASSEMBLER
- fixS **seg_fix_rootP = & (seg_info (now_seg)->fix_root);
- fixS **seg_fix_tailP = & (seg_info (now_seg)->fix_tail);
+ 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
case O_absent:
break;
+ case O_add:
+ /* This comes up when _GLOBAL_OFFSET_TABLE_+(.-L0) is read, if
+ the difference expression cannot immediately be reduced. */
+ {
+ extern symbolS *make_expr_symbol ();
+ symbolS *stmp = make_expr_symbol (exp);
+ exp->X_op = O_symbol;
+ exp->X_op_symbol = 0;
+ exp->X_add_symbol = stmp;
+ exp->X_add_number = 0;
+ return fix_new_exp (frag, where, size, exp, pcrel, r_type);
+ }
+
case O_uminus:
sub = exp->X_add_symbol;
off = exp->X_add_number;
#endif
}
+#ifdef BFD_ASSEMBLER
+
+/* Reset the section indices after removing the gas created sections. */
+
+static void
+renumber_sections (abfd, sec, countparg)
+ bfd *abfd;
+ asection *sec;
+ PTR countparg;
+{
+ int *countp = (int *) countparg;
+
+ sec->index = *countp;
+ ++*countp;
+}
+
+#endif /* defined (BFD_ASSEMBLER) */
+
#if defined (BFD_ASSEMBLER) || ! defined (BFD)
static fragS *
struct frchain *frchp;
{
fragS dummy, *prev_frag = &dummy;
+ fixS fix_dummy;
+#ifdef BFD_ASSEMBLER
+ fixS *prev_fix = &fix_dummy;
+#endif
+
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;
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
switch (fragP->fr_type)
{
case rs_align:
+ case rs_align_code:
case rs_org:
+ case rs_space:
#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);
+ - fragP->fr_fix) / fragP->fr_var;
+ assert (fragP->fr_offset >= 0);
+ fragP->fr_type = rs_fill;
break;
case rs_fill:
flags = bfd_get_section_flags (abfd, sec);
- seginfo = (segment_info_type *) bfd_get_section_userdata (abfd, sec);
+ seginfo = seg_info (sec);
if (seginfo && seginfo->frchainP)
{
relax_segment (seginfo->frchainP->frch_root, sec);
{
symbolS *s = fixp->fx_addsy;
if (s)
- fprintf (stream, " %08x: %s(%s+%x)+%x\n", fixp,
- S_GET_NAME (s), s->bsym->section->name,
- S_GET_VALUE (s), fixp->fx_offset);
+ {
+ 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;
#define dump_section_relocs(ABFD,SEC,STREAM) (void)(ABFD,SEC,STREAM)
#endif
+#ifndef EMIT_SECTION_SYMBOLS
+#define EMIT_SECTION_SYMBOLS 1
+#endif
+
static void
adjust_reloc_syms (abfd, sec, xxx)
bfd *abfd;
dump_section_relocs (abfd, sec, stderr);
for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next)
- if (fixp->fx_addsy)
+ if (fixp->fx_done)
+ /* ignore it */;
+ else if (fixp->fx_addsy)
{
- symbolS *sym = fixp->fx_addsy;
- asection *symsec = sym->bsym->section;
- segment_info_type *symseginfo = seg_info (symsec);
+ symbolS *sym;
+ asection *symsec;
+
+ reduce_fixup:
+
+#ifdef DEBUG5
+ fprintf (stderr, "\n\nadjusting fixup:\n");
+ print_fixup (fixp);
+#endif
+
+ sym = fixp->fx_addsy;
+ 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
+ if (bfd_is_und_section (symsec)
+ || bfd_is_abs_section (symsec)
|| bfd_is_com_section (symsec))
{
fixp->fx_addsy->sy_used_in_reloc = 1;
- continue;
+ goto done;
}
/* Since we're reducing to section symbols, don't attempt to reduce
anything that's already using one. */
- if (sym->bsym == symsec->symbol)
+ if (sym->bsym->flags & BSF_SECTION_SYM)
{
fixp->fx_addsy->sy_used_in_reloc = 1;
- continue;
+ goto done;
}
/* Is there some other reason we can't adjust this one? (E.g.,
if (! obj_fix_adjustable (fixp))
{
fixp->fx_addsy->sy_used_in_reloc = 1;
- continue;
+ goto done;
}
#endif
if (! tc_fix_adjustable (fixp))
{
fixp->fx_addsy->sy_used_in_reloc = 1;
- continue;
+ goto done;
}
#endif
+ /* For PIC support: We may get expressions like
+ "_GLOBAL_OFFSET_TABLE_+(.-L5)" where "." and "L5" may not
+ necessarily have had a fixed difference initially. But now
+ it should be a known constant, so we can reduce it. Since
+ we can't easily handle a symbol value that looks like
+ someUndefinedSymbol+const, though, we convert the fixup to
+ access the undefined symbol directly, and discard the
+ intermediate symbol. */
+ if (S_GET_SEGMENT (sym) == expr_section
+ && sym->sy_value.X_op == O_add
+ && (resolve_symbol_value (sym->sy_value.X_add_symbol),
+ S_GET_SEGMENT (sym->sy_value.X_add_symbol) == undefined_section)
+ && (resolve_symbol_value (sym->sy_value.X_op_symbol),
+ S_GET_SEGMENT (sym->sy_value.X_op_symbol) == absolute_section))
+ {
+ fixp->fx_offset += S_GET_VALUE (sym->sy_value.X_op_symbol);
+ fixp->fx_offset += sym->sy_value.X_add_number;
+ fixp->fx_addsy = sym->sy_value.X_add_symbol;
+ goto reduce_fixup;
+ }
+
/* 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;
+
+ done:
+ ;
}
-#ifdef RELOC_REQUIRES_SYMBOL
+#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. */
- static symbolS *abs_sym;
- if (!abs_sym)
- {
- abs_sym = symbol_new ("*absolute0zero*", &bfd_abs_section, 0,
- &zero_address_frag);
- abs_sym->sy_used_in_reloc = 1;
- }
- fixp->fx_addsy = abs_sym;
+
+ fixp->fx_addsy = section_symbol (absolute_section);
+/* fixp->fx_addsy->sy_used_in_reloc = 1; */
}
#endif
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. */
for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next)
{
arelent *reloc;
- char *data;
bfd_reloc_status_type s;
- if (fixp->fx_addsy == 0)
+ if (fixp->fx_done)
{
- /* @@ Need some other flag to indicate which have already
- been performed... */
n--;
continue;
}
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);
+ s = bfd_install_relocation (stdoutput, reloc,
+ fixp->fx_frag->fr_literal,
+ fixp->fx_frag->fr_address,
+ sec, &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");
+ as_fatal ("%s:%u: bad return from bfd_perform_relocation",
+ fixp->fx_file, fixp->fx_line);
}
relocs[i++] = reloc;
}
bfd_reloc_status_type s;
int j;
- if (fixp->fx_addsy == 0)
+ if (fixp->fx_done)
{
- /* @@ Need some other flag to indicate which have already
- been performed... */
n--;
continue;
}
abort ();
for (j = 0; reloc[j]; j++)
{
- s = bfd_perform_relocation (stdoutput, reloc[j],
- data - reloc[0]->address,
- sec, stdoutput);
+ s = bfd_install_relocation (stdoutput, reloc[j],
+ fixp->fx_frag->fr_literal,
+ fixp->fx_frag->fr_address,
+ sec, &err);
switch (s)
{
- case bfd_reloc_ok:
- break;
- default:
- as_fatal ("bad return from bfd_perform_relocation");
+ case bfd_reloc_ok:
+ break;
+ case bfd_reloc_overflow:
+ as_bad_where (fixp->fx_file, fixp->fx_line,
+ "relocation overflow");
+ break;
+ default:
+ as_fatal ("%s:%u: bad return from bfd_perform_relocation",
+ fixp->fx_file, fixp->fx_line);
}
}
}
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 DEBUG2
+
+#ifdef DEBUG3
{
int i;
arelent *r;
x = bfd_set_section_contents (stdoutput, sec,
f->fr_literal, (file_ptr) offset,
(bfd_size_type) f->fr_fix);
- assert (x == true);
+ if (x == false)
+ {
+ bfd_perror (stdoutput->filename);
+ as_perror ("FATAL: Can't write %s", stdoutput->filename);
+ exit (EXIT_FAILURE);
+ }
offset += f->fr_fix;
}
fill_literal = f->fr_literal + f->fr_fix;
count = f->fr_offset;
assert (count >= 0);
if (fill_size && count)
+#ifdef BFD_FAST_SECTION_FILL
+ {
+ char buf[256];
+ if (fill_size > sizeof(buf)) {
+ /* Do it the old way. Can this ever happen? */
+ 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 (EXIT_FAILURE);
+ }
+ offset += fill_size;
+ }
+ }
+ else {
+ /* Build a buffer full of fill objects and output it as
+ * often as necessary. This saves on the overhead of potentially
+ * lots of bfd_set_section_contents calls.
+ */
+ int n_per_buf, i;
+ if (fill_size == 1)
+ {
+ n_per_buf = sizeof (buf);
+ memset (buf, *fill_literal, n_per_buf);
+ }
+ else
+ {
+ char *bufp;
+ n_per_buf = sizeof(buf)/fill_size;
+ for (i = n_per_buf, bufp = buf; i; i--, bufp += fill_size)
+ memcpy(bufp, fill_literal, fill_size);
+ }
+ for (; count > 0; count -= n_per_buf)
+ {
+ n_per_buf = n_per_buf > count ? count : n_per_buf;
+ x = bfd_set_section_contents (stdoutput, sec,
+ buf, (file_ptr) offset,
+ (bfd_size_type) n_per_buf * fill_size);
+ assert (x == true);
+ offset += n_per_buf * fill_size;
+ }
+ }
+ }
+#else
while (count--)
{
x = bfd_set_section_contents (stdoutput, sec,
assert (x == true);
offset += fill_size;
}
+#endif
}
}
#endif
#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 ()
{
- register struct frchain *frchainP; /* Track along all frchains. */
+ struct frchain *frchainP; /* Track along all frchains. */
#if ! defined (BFD_ASSEMBLER) || ! defined (WORKING_DOT_WORD)
- register fragS *fragP; /* Track along all frags. */
-#endif
-#if !defined (BFD_ASSEMBLER) && !defined (OBJ_VMS)
- long object_file_size;
+ fragS *fragP; /* Track along all frags. */
#endif
/* Do we really want to write it? */
n_errs = had_errors ();
/* The -Z flag indicates that an object file should be generated,
regardless of warnings and errors. */
- if (flagseen['Z'])
+ if (flag_always_generate_output)
{
if (n_warns || n_errs)
as_warn ("%d error%s, %d warning%s, generating bad object file.\n",
}
#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 ();
+ /* 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
/* Remove the sections created by gas for its own purposes. */
{
asection **seclist, *sec;
+ int i;
+
seclist = &stdoutput->sections;
while (seclist && *seclist)
{
if (*seclist)
seclist = &(*seclist)->next;
}
+ i = 0;
+ bfd_map_over_sections (stdoutput, renumber_sections, &i);
}
bfd_map_over_sections (stdoutput, chain_frchains_together, (char *) 0);
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 (flagseen['R'])
+ if (flag_readonly_data_in_text)
{
merge_data_into_text ();
}
exp.X_op_symbol = lie->sub;
exp.X_add_number = lie->addnum;
#ifdef BFD_ASSEMBLER
+#ifdef TC_CONS_FIX_NEW
+ TC_CONS_FIX_NEW (lie->frag,
+ lie->word_goes_here - lie->frag->fr_literal,
+ 2, &exp);
+#else
fix_new_exp (lie->frag,
lie->word_goes_here - lie->frag->fr_literal,
2, &exp, 0, BFD_RELOC_NONE);
+#endif
#else
#if defined(TC_SPARC) || defined(TC_A29K) || defined(NEED_FX_R_TYPE)
fix_new_exp (lie->frag,
/* Patch the jump table */
/* This is the offset from ??? to table_ptr+0 */
to_addr = table_addr - S_GET_VALUE (lie->sub);
+#ifdef BFD_ASSEMBLER
+ to_addr -= lie->sub->sy_frag->fr_address;
+#endif
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)
{
/* this is a long jump from table_ptr+0 to the final target */
from_addr = table_addr;
to_addr = S_GET_VALUE (lie->add) + lie->addnum;
+#ifdef BFD_ASSEMBLER
+ to_addr += lie->add->sy_frag->fr_address;
+#endif
md_create_long_jump (table_ptr, from_addr, to_addr, lie->dispfrag, lie->add);
table_ptr += md_long_jump_size;
table_addr += md_long_jump_size;
#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.
/*
* Now do the VMS-dependent part of writing the object file
*/
- VMS_write_object_file (H_GET_TEXT_SIZE (&headers),
+ 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 */
#else /* BFD_ASSEMBLER */
+ /* Resolve symbol values. This needs to be done before processing
+ the relocations. */
+ if (symbol_rootP)
+ {
+ symbolS *symp;
+
+ for (symp = symbol_rootP; symp; symp = symbol_next (symp))
+ if (!symp->sy_resolved)
+ resolve_symbol_value (symp);
+ }
+
bfd_map_over_sections (stdoutput, adjust_reloc_syms, (char *)0);
/* Set up symbol table, and write it out. */
if (symbol_rootP)
{
- unsigned int i = 0;
- unsigned int n;
symbolS *symp;
for (symp = symbol_rootP; symp; symp = symbol_next (symp))
{
+ int punt = 0;
+
+ /* Do it again, because adjust_reloc_syms might introduce
+ more symbols. They'll probably only be section symbols,
+ but they'll still need to have the values computed. */
if (! symp->sy_resolved)
{
if (symp->sy_value.X_op == O_constant)
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);
+ S_SET_SEGMENT (symp, bfd_com_section_ptr);
#if 0
printf ("symbol `%s'\n\t@%x: value=%d flags=%x seg=%s\n",
S_GET_NAME (symp), symp,
#endif
#ifdef obj_frob_symbol
- {
- int punt = 0;
- obj_frob_symbol (symp, punt);
- if (punt)
- goto punt_it;
- }
+ obj_frob_symbol (symp, punt);
#endif
#ifdef tc_frob_symbol
- {
- int punt = 0;
+ if (! punt || symp->sy_used_in_reloc)
tc_frob_symbol (symp, punt);
- if (punt)
- goto punt_it;
- }
#endif
- /* If we don't want to keep this symbol, splice it out of the
- chain now. */
- if (S_IS_LOCAL (symp))
+ /* 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))
{
- punt_it:
- if (! symp->sy_used_in_reloc)
- {
- symbolS *prev, *next;
- prev = symbol_previous (symp);
- next = symbol_next (symp);
-#ifdef DEBUG_SYMS
- verify_symbol_chain_2 (symp);
-#endif
- if (prev)
- {
- symbol_next (prev) = next;
- symp = prev;
- }
- else if (symp == symbol_rootP)
- symbol_rootP = next;
- else
- abort ();
- if (next)
- symbol_previous (next) = prev;
- else
- symbol_lastP = prev;
-#ifdef DEBUG_SYMS
- if (prev)
- verify_symbol_chain_2 (prev);
- else if (next)
- verify_symbol_chain_2 (next);
-#endif
- continue;
- }
+ 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. */
/* 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);
-
- i++;
- }
- n = i;
- if (n)
- {
- asymbol **asympp;
- boolean result;
- extern PTR bfd_alloc PARAMS ((bfd *, size_t));
-
- asympp = (asymbol **) bfd_alloc (stdoutput,
- n * sizeof (asymbol *));
- symp = symbol_rootP;
- for (i = 0; i < n; i++, symp = symbol_next (symp))
- {
- asympp[i] = symp->bsym;
- symp->written = 1;
- }
- result = bfd_set_symtab (stdoutput, asympp, n);
- assert (result == true);
}
}
+ /* Now do any format-specific adjustments to the symbol table, such
+ as adding file symbols. */
+#ifdef obj_adjust_symtab
+ obj_adjust_symtab ();
+#endif
-#ifdef obj_frob_file
- /* If obj_frob_file changes the symbol value at this point, it is
+ /* 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
- {obj,tc}_frob_symbol. */
+ *_frob_symbol. */
+#ifdef tc_frob_file
+ tc_frob_file ();
+#endif
+#ifdef obj_frob_file
obj_frob_file ();
#endif
- /* Now that all the sizes are known, and contents correct, we can
- start writing the file. */
bfd_map_over_sections (stdoutput, write_relocs, (char *) 0);
bfd_map_over_sections (stdoutput, write_contents, (char *) 0);
break;
case rs_align:
- address += relax_align (address, (int) fragP->fr_offset);
+ case rs_align_code:
+ {
+ 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:
+ case rs_space:
/* Assume .org is nugatory. It will grow with 1st relax. */
break;
+ S_GET_VALUE (lie->sub)));
if (offset <= -32768 || offset >= 32767)
{
- if (flagseen['K'])
+ if (flag_warn_displacement)
{
char buf[50];
sprint_value (buf, (addressT) lie->addnum);
} /* case rs_broken_word */
#endif
case rs_align:
+ case rs_align_code:
growth = (relax_align ((relax_addressT) (address
+ fragP->fr_fix),
(int) offset)
growth -= stretch; /* This is an absolute growth factor */
break;
+ case rs_space:
+ if (symbolP)
+ {
+ growth = S_GET_VALUE (symbolP);
+ if (symbolP->sy_frag != &zero_address_frag)
+ as_bad (".space specifies non-absolute value");
+ fragP->fr_symbol = 0;
+ if (growth < 0)
+ {
+ as_warn (".space or .fill with negative value, ignored");
+ growth = 0;
+ }
+ }
+ else
+ growth = 0;
+ break;
+
case rs_machine_dependent:
#ifdef md_relax_frag
growth = md_relax_frag (fragP, stretch);
}
aim = target - address - fragP->fr_fix;
- /* The displacement is affected by the instruction size
- for the 32k architecture. I think we ought to be able
- 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 */
-#ifndef TC_NS32K
- if (fragP->fr_pcrel_adjust)
- abort ();
+#ifdef TC_PCREL_ADJUST
+ /* Currently only the ns32k family needs this */
+ aim += TC_PCREL_ADJUST(fragP);
+#else
+ /* This machine doesn't want to use pcrel_adjust.
+ In that case, pcrel_adjust should be zero. */
+ assert (fragP->fr_pcrel_adjust == 0);
#endif
- aim += fragP->fr_pcrel_adjust;
if (aim < 0)
{
#if defined (BFD_ASSEMBLER) || !defined (BFD)
+#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
int size;
char *place;
long where;
- char pcrel;
+ int pcrel, plt;
fragS *fragP;
segT add_symbol_segment = absolute_section;
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;
sub_symbolP = fixP->fx_subsy;
add_number = fixP->fx_offset;
pcrel = fixP->fx_pcrel;
-
+ plt = fixP->fx_plt;
+
if (add_symbolP)
add_symbol_segment = S_GET_SEGMENT (add_symbolP);
}
else
bad_sub_reloc:
- as_bad ("Negative of non-absolute symbol %s",
- S_GET_NAME (sub_symbolP));
+ 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)
/* Makes no sense to use the difference of 2 arbitrary symbols
as the target of a call instruction. */
if (fixP->fx_tcbit)
- as_bad ("callj to difference of 2 symbols");
+ 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);
as to whether or not a relocation will be needed to
handle this fixup. */
if (!TC_FORCE_RELOCATION (fixP))
- fixP->fx_addsy = NULL;
+ {
+ fixP->fx_addsy = NULL;
+ }
}
else
{
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 ("Can't emit reloc {- %s-seg symbol \"%s\"} @ file address %s.",
- segment_name (S_GET_SEGMENT (sub_symbolP)),
- S_GET_NAME (sub_symbolP), buf);
+ 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)
+ if (add_symbol_segment == this_segment_type && pcrel && !plt
+ && TC_RELOC_RTSYM_LOC_FIXUP (fixP->fx_r_type))
{
/*
* This fixup was made when the symbol's segment was
as to whether or not a relocation will be needed to
handle this fixup. */
if (!TC_FORCE_RELOCATION (fixP))
- fixP->fx_addsy = NULL;
+ {
+ fixP->fx_pcrel = 0;
+ fixP->fx_addsy = NULL;
+ }
}
else
{
* for local branches: flag as error, don't generate
* relocation.
*/
- as_bad ("can't use COBR format with external label");
-
- /* 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;
+ 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 */
else
{
seg_reloc_count++;
+#if !defined (TC_I386) || !(defined (OBJ_ELF) || defined (OBJ_COFF))
add_number += S_GET_VALUE (add_symbolP);
+#endif
}
}
}
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 there's an add_symbol */
- } /* if pcrel */
+ }
+ }
if (!fixP->fx_bit_fixP && size > 0)
{
valueT mask = 0;
- /* set all bits to one */
- mask--;
- /* Technically speaking, combining these produces an
- undefined result if size is sizeof (valueT), though I
- think these two half-way operations should both be
- defined. */
- mask <<= size * 4;
- mask <<= size * 4;
- if ((add_number & mask) != 0
- && (add_number & mask) != mask)
+ if (size < sizeof (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 */
+ /* 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']
+ if (!flag_signed_overflow_ok
&& size == 2
&& add_number > 0x7fff)
as_bad_where (fixP->fx_file, fixP->fx_line,
#endif
} /* not a bit fix */
+ if (!fixP->fx_done)
+ {
#ifdef BFD_ASSEMBLER
- md_apply_fix (fixP, &add_number);
+ md_apply_fix (fixP, &add_number);
#else
- md_apply_fix (fixP, add_number);
+ md_apply_fix (fixP, add_number);
+#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
+ }
+#ifdef TC_VALIDATE_FIX
+ skip: ;
+#endif
+#ifdef DEBUG5
+ fprintf (stderr, "result:\n");
+ print_fixup (fixP);
#endif
- skip:
- ;
} /* For each fixS in this segment. */
TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count);
}
}
+/* for debugging */
+extern int indent_level;
+extern void print_symbol_value_1 ();
+
+void
+print_fixup (fixp)
+ fixS *fixp;
+{
+ indent_level = 1;
+ fprintf (stderr, "fix %lx %s:%d", (long) fixp, fixp->fx_file, fixp->fx_line);
+ if (fixp->fx_pcrel)
+ fprintf (stderr, " pcrel");
+ if (fixp->fx_pcrel_adjust)
+ fprintf (stderr, " pcrel_adjust=%d", fixp->fx_pcrel_adjust);
+ if (fixp->fx_im_disp)
+ {
+#ifdef TC_NS32K
+ fprintf (stderr, " im_disp=%d", fixp->fx_im_disp);
+#else
+ fprintf (stderr, " im_disp");
+#endif
+ }
+ if (fixp->fx_tcbit)
+ fprintf (stderr, " tcbit");
+ if (fixp->fx_done)
+ fprintf (stderr, " done");
+ fprintf (stderr, "\n size=%d frag=%lx where=%ld offset=%lx addnumber=%lx",
+ fixp->fx_size, (long) fixp->fx_frag, (long) fixp->fx_where,
+ (long) fixp->fx_offset, (long) fixp->fx_addnumber);
+#ifdef BFD_ASSEMBLER
+ fprintf (stderr, "\n %s (%d)", bfd_get_reloc_code_name (fixp->fx_r_type),
+ fixp->fx_r_type);
+#else
+#ifdef NEED_FX_R_TYPE
+ fprintf (stderr, " r_type=%d", fixp->fx_r_type);
+#endif
+#endif
+ if (fixp->fx_addsy)
+ {
+ fprintf (stderr, "\n +<");
+ print_symbol_value_1 (stderr, fixp->fx_addsy);
+ fprintf (stderr, ">");
+ }
+ if (fixp->fx_subsy)
+ {
+ fprintf (stderr, "\n -<");
+ print_symbol_value_1 (stderr, fixp->fx_subsy);
+ fprintf (stderr, ">");
+ }
+ fprintf (stderr, "\n");
+}
+
/* end of write.c */
projects / deliverable / binutils-gdb.git / blobdiff