/* write.c - emit .o file
Copyright 1986, 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
- 1998, 1999, 2000, 2001
+ 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
GAS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
+ the Free Software Foundation; either version 3, or (at your option)
any later version.
GAS is distributed in the hope that it will be useful,
You should have received a copy of the GNU General Public License
along with GAS; see the file COPYING. If not, write to the Free
- Software Foundation, 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA. */
+ Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
+ 02110-1301, USA. */
/* This thing should be set up to do byteordering correctly. But... */
#include "obstack.h"
#include "output-file.h"
#include "dwarf2dbg.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
+#include "libbfd.h"
#ifndef TC_ADJUST_RELOC_COUNT
-#define TC_ADJUST_RELOC_COUNT(FIXP,COUNT)
+#define TC_ADJUST_RELOC_COUNT(FIX, COUNT)
#endif
#ifndef TC_FORCE_RELOCATION
-#define TC_FORCE_RELOCATION(FIXP) 0
+#define TC_FORCE_RELOCATION(FIX) \
+ (generic_force_reloc (FIX))
+#endif
+
+#ifndef TC_FORCE_RELOCATION_ABS
+#define TC_FORCE_RELOCATION_ABS(FIX) \
+ (TC_FORCE_RELOCATION (FIX))
+#endif
+
+#ifndef TC_FORCE_RELOCATION_LOCAL
+#define TC_FORCE_RELOCATION_LOCAL(FIX) \
+ (!(FIX)->fx_pcrel \
+ || TC_FORCE_RELOCATION (FIX))
+#endif
+
+#ifndef TC_FORCE_RELOCATION_SUB_SAME
+#define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEG) \
+ (! SEG_NORMAL (SEG))
+#endif
+
+#ifndef md_register_arithmetic
+# define md_register_arithmetic 1
+#endif
+
+#ifndef TC_FORCE_RELOCATION_SUB_ABS
+#define TC_FORCE_RELOCATION_SUB_ABS(FIX, SEG) \
+ (!md_register_arithmetic && (SEG) == reg_section)
#endif
-#ifndef TC_FORCE_RELOCATION_SECTION
-#define TC_FORCE_RELOCATION_SECTION(FIXP,SEG) TC_FORCE_RELOCATION(FIXP)
+#ifndef TC_FORCE_RELOCATION_SUB_LOCAL
+#ifdef DIFF_EXPR_OK
+#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) \
+ (!md_register_arithmetic && (SEG) == reg_section)
+#else
+#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) 1
+#endif
+#endif
+
+#ifndef TC_VALIDATE_FIX_SUB
+#ifdef UNDEFINED_DIFFERENCE_OK
+/* The PA needs this for PIC code generation. */
+#define TC_VALIDATE_FIX_SUB(FIX, SEG) \
+ (md_register_arithmetic || (SEG) != reg_section)
+#else
+#define TC_VALIDATE_FIX_SUB(FIX, SEG) \
+ ((md_register_arithmetic || (SEG) != reg_section) \
+ && ((FIX)->fx_r_type == BFD_RELOC_GPREL32 \
+ || (FIX)->fx_r_type == BFD_RELOC_GPREL16))
+#endif
#endif
#ifndef TC_LINKRELAX_FIXUP
#define TC_LINKRELAX_FIXUP(SEG) 1
#endif
-#ifndef TC_FIX_ADJUSTABLE
-#define TC_FIX_ADJUSTABLE(fix) 1
+#ifndef MD_APPLY_SYM_VALUE
+#define MD_APPLY_SYM_VALUE(FIX) 1
#endif
#ifndef TC_FINALIZE_SYMS_BEFORE_SIZE_SEG
#endif
#ifndef MD_PCREL_FROM_SECTION
-#define MD_PCREL_FROM_SECTION(FIXP, SEC) md_pcrel_from(FIXP)
+#define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from (FIX)
#endif
-#ifndef WORKING_DOT_WORD
-extern CONST int md_short_jump_size;
-extern CONST int md_long_jump_size;
+#ifndef TC_FAKE_LABEL
+#define TC_FAKE_LABEL(NAME) (strcmp ((NAME), FAKE_LABEL_NAME) == 0)
+#endif
+
+/* Positive values of TC_FX_SIZE_SLACK allow a target to define
+ fixups that far past the end of a frag. Having such fixups
+ is of course most most likely a bug in setting fx_size correctly.
+ A negative value disables the fixup check entirely, which is
+ appropriate for something like the Renesas / SuperH SH_COUNT
+ reloc. */
+#ifndef TC_FX_SIZE_SLACK
+#define TC_FX_SIZE_SLACK(FIX) 0
#endif
/* Used to control final evaluation of expressions. */
int finalize_syms = 0;
int symbol_table_frozen;
-void print_fixup PARAMS ((fixS *));
-#ifdef BFD_ASSEMBLER
-static void renumber_sections PARAMS ((bfd *, asection *, PTR));
+symbolS *abs_section_sym;
+
+/* Remember the value of dot when parsing expressions. */
+addressT dot_value;
+
+/* Relocs generated by ".reloc" pseudo. */
+struct reloc_list* reloc_list;
+
+void print_fixup (fixS *);
/* 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;
-struct frag *bss_frag_root;
-
-struct frag *text_last_frag; /* Last frag in segment. */
-struct frag *data_last_frag; /* Last frag in segment. */
-static struct frag *bss_last_frag; /* Last frag in segment. */
-#endif
-
-#ifndef BFD
-static object_headers headers;
-#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
-
-#endif /* BFD_ASSEMBLER */
static int n_fixups;
-#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) && !defined (OBJ_VMS))
-static long fixup_segment PARAMS ((fixS * fixP, segT this_segment_type));
-#endif
-static relax_addressT relax_align PARAMS ((relax_addressT addr, int align));
-#if defined (BFD_ASSEMBLER) || ! defined (BFD)
-static fragS *chain_frchains_together_1 PARAMS ((segT, struct frchain *));
-#endif
-#ifdef BFD_ASSEMBLER
-static void chain_frchains_together PARAMS ((bfd *, segT, PTR));
-static void cvt_frag_to_fill PARAMS ((segT, fragS *));
-static void adjust_reloc_syms PARAMS ((bfd *, asection *, PTR));
-static void write_relocs PARAMS ((bfd *, asection *, PTR));
-static void write_contents PARAMS ((bfd *, asection *, PTR));
-static void set_symtab PARAMS ((void));
-#endif
-#if defined (BFD_ASSEMBLER) || (! defined (BFD) && ! defined (OBJ_AOUT))
-static void merge_data_into_text PARAMS ((void));
-#endif
-#if ! defined (BFD_ASSEMBLER) && ! defined (BFD)
-static void cvt_frag_to_fill PARAMS ((object_headers *, segT, fragS *));
-static void remove_subsegs PARAMS ((frchainS *, int, fragS **, fragS **));
-static void relax_and_size_all_segments PARAMS ((void));
-#endif
-#if defined (BFD_ASSEMBLER) && defined (OBJ_COFF) && defined (TE_GO32)
-static void set_segment_vma PARAMS ((bfd *, asection *, PTR));
-#endif
+#define RELOC_ENUM enum bfd_reloc_code_real
/* Create a fixS in obstack 'notes'. */
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? */
- int size; /* 1, 2, or 4 usually. */
- symbolS *add_symbol; /* X_add_symbol. */
- 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
+fix_new_internal (fragS *frag, /* Which frag? */
+ int where, /* Where in that frag? */
+ int size, /* 1, 2, or 4 usually. */
+ symbolS *add_symbol, /* X_add_symbol. */
+ symbolS *sub_symbol, /* X_op_symbol. */
+ offsetT offset, /* X_add_number. */
+ int pcrel, /* TRUE if PC-relative relocation. */
+ RELOC_ENUM r_type ATTRIBUTE_UNUSED /* Relocation type. */)
{
fixS *fixP;
fixP->fx_addsy = add_symbol;
fixP->fx_subsy = sub_symbol;
fixP->fx_offset = offset;
+ fixP->fx_dot_value = dot_value;
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_im_disp = 0;
fixP->fx_pcrel_adjust = 0;
fixP->fx_bit_fixP = 0;
fixP->fx_addnumber = 0;
fixP->fx_tcbit = 0;
+ fixP->fx_tcbit2 = 0;
fixP->fx_done = 0;
fixP->fx_no_overflow = 0;
fixP->fx_signed = 0;
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
/* 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? */
- 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
+fix_new (fragS *frag, /* Which frag? */
+ int where, /* Where in that frag? */
+ 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. */
+ RELOC_ENUM r_type /* Relocation type. */)
{
return fix_new_internal (frag, where, size, add_symbol,
(symbolS *) NULL, offset, pcrel, r_type);
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? */
- 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
+fix_new_exp (fragS *frag, /* Which frag? */
+ int where, /* Where in that frag? */
+ int size, /* 1, 2, or 4 usually. */
+ expressionS *exp, /* Expression. */
+ int pcrel, /* TRUE if PC-relative relocation. */
+ RELOC_ENUM r_type /* Relocation type. */)
{
symbolS *add = NULL;
symbolS *sub = NULL;
case O_symbol_rva:
add = exp->X_add_symbol;
off = exp->X_add_number;
-
-#if defined(BFD_ASSEMBLER)
r_type = BFD_RELOC_RVA;
-#else
-#if defined(TC_RVA_RELOC)
- r_type = TC_RVA_RELOC;
-#else
- as_fatal (_("rva not supported"));
-#endif
-#endif
break;
case O_uminus:
return fix_new_internal (frag, where, size, add, sub, off, pcrel, r_type);
}
+/* Generic function to determine whether a fixup requires a relocation. */
+int
+generic_force_reloc (fixS *fix)
+{
+ if (fix->fx_r_type == BFD_RELOC_VTABLE_INHERIT
+ || fix->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
+ return 1;
+
+ if (fix->fx_addsy == NULL)
+ return 0;
+
+ return S_FORCE_RELOC (fix->fx_addsy, fix->fx_subsy == NULL);
+}
+
/* Append a string onto another string, bumping the pointer along. */
void
-append (charPP, fromP, length)
- char **charPP;
- char *fromP;
- unsigned long length;
+append (char **charPP, char *fromP, unsigned long length)
{
/* Don't trust memcpy() of 0 chars. */
if (length == 0)
*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;
+record_alignment (/* 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)
{
if (seg == absolute_section)
return;
-#ifdef BFD_ASSEMBLER
+
if ((unsigned int) 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
}
int
-get_recorded_alignment (seg)
- segT seg;
+get_recorded_alignment (segT seg)
{
if (seg == absolute_section)
return 0;
-#ifdef BFD_ASSEMBLER
+
return bfd_get_section_alignment (stdoutput, seg);
-#else
- return section_alignment[(int) seg];
-#endif
}
-#ifdef BFD_ASSEMBLER
-
/* Reset the section indices after removing the gas created sections. */
static void
-renumber_sections (abfd, sec, countparg)
- bfd *abfd ATTRIBUTE_UNUSED;
- asection *sec;
- PTR countparg;
+renumber_sections (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *countparg)
{
int *countp = (int *) countparg;
++*countp;
}
-#endif /* defined (BFD_ASSEMBLER) */
-
-#if defined (BFD_ASSEMBLER) || ! defined (BFD)
-
static fragS *
-chain_frchains_together_1 (section, frchp)
- segT section;
- struct frchain *frchp;
+chain_frchains_together_1 (segT section, struct frchain *frchp)
{
fragS dummy, *prev_frag = &dummy;
-#ifdef BFD_ASSEMBLER
fixS fix_dummy, *prev_fix = &fix_dummy;
-#endif
- for (; frchp && frchp->frch_seg == section; frchp = frchp->frch_next)
+ for (; frchp; frchp = frchp->frch_next)
{
prev_frag->fr_next = frchp->frch_root;
prev_frag = frchp->frch_last;
- assert (prev_frag->fr_type != 0);
-#ifdef BFD_ASSEMBLER
+ gas_assert (prev_frag->fr_type != 0);
if (frchp->fix_root != (fixS *) NULL)
{
if (seg_info (section)->fix_root == (fixS *) NULL)
seg_info (section)->fix_tail = frchp->fix_tail;
prev_fix = frchp->fix_tail;
}
-#endif
}
- assert (prev_frag->fr_type != 0);
+ gas_assert (prev_frag->fr_type != 0);
+ gas_assert (prev_frag != &dummy);
prev_frag->fr_next = 0;
return prev_frag;
}
-#endif
-
-#ifdef BFD_ASSEMBLER
-
static void
-chain_frchains_together (abfd, section, xxx)
- bfd *abfd ATTRIBUTE_UNUSED;
- segT section;
- PTR xxx ATTRIBUTE_UNUSED;
+chain_frchains_together (bfd *abfd ATTRIBUTE_UNUSED,
+ segT section,
+ void *xxx ATTRIBUTE_UNUSED)
{
segment_info_type *info;
frags_chained = 1;
}
-#endif
-
-#if !defined (BFD) && !defined (BFD_ASSEMBLER)
-
-static void
-remove_subsegs (head, seg, root, last)
- frchainS *head;
- int seg;
- fragS **root;
- fragS **last;
-{
- *root = head->frch_root;
- *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 ATTRIBUTE_UNUSED;
- fragS *fragP;
-#else
static void
-cvt_frag_to_fill (headersP, sec, fragP)
- object_headers *headersP;
- segT sec;
- fragS *fragP;
-#endif
+cvt_frag_to_fill (segT sec ATTRIBUTE_UNUSED, fragS *fragP)
{
switch (fragP->fr_type)
{
as_bad_where (fragP->fr_file, fragP->fr_line,
_("attempt to .org/.space backwards? (%ld)"),
(long) fragP->fr_offset);
+ fragP->fr_offset = 0;
}
fragP->fr_type = rs_fill;
break;
break;
case rs_machine_dependent:
-#ifdef BFD_ASSEMBLER
md_convert_frag (stdoutput, sec, fragP);
-#else
- md_convert_frag (headersP, sec, fragP);
-#endif
- assert (fragP->fr_next == NULL
+ gas_assert (fragP->fr_next == NULL
|| ((offsetT) (fragP->fr_next->fr_address - fragP->fr_address)
== fragP->fr_fix));
BAD_CASE (fragP->fr_type);
break;
}
+#ifdef md_frag_check
+ md_frag_check (fragP);
+#endif
}
-#endif /* defined (BFD_ASSEMBLER) || !defined (BFD) */
+struct relax_seg_info
+{
+ int pass;
+ int changed;
+};
-#ifdef BFD_ASSEMBLER
-static void relax_seg PARAMS ((bfd *, asection *, PTR));
static void
-relax_seg (abfd, sec, xxx)
- bfd *abfd ATTRIBUTE_UNUSED;
- asection *sec;
- PTR xxx;
+relax_seg (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *xxx)
{
segment_info_type *seginfo = seg_info (sec);
+ struct relax_seg_info *info = (struct relax_seg_info *) xxx;
if (seginfo && seginfo->frchainP
- && relax_segment (seginfo->frchainP->frch_root, sec))
- {
- int *result = (int *) xxx;
- *result = 1;
- }
+ && relax_segment (seginfo->frchainP->frch_root, sec, info->pass))
+ info->changed = 1;
}
-static void size_seg PARAMS ((bfd *, asection *, PTR));
static void
-size_seg (abfd, sec, xxx)
- bfd *abfd;
- asection *sec;
- PTR xxx ATTRIBUTE_UNUSED;
+size_seg (bfd *abfd, asection *sec, void *xxx ATTRIBUTE_UNUSED)
{
flagword flags;
fragS *fragp;
size = 0;
flags = bfd_get_section_flags (abfd, sec);
+ if (size == 0 && bfd_get_section_size (sec) != 0 &&
+ (flags & SEC_HAS_CONTENTS) != 0)
+ return;
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;
+ flags &= ~SEC_RELOC;
x = bfd_set_section_flags (abfd, sec, flags);
- assert (x == true);
+ gas_assert (x);
newsize = md_section_align (sec, size);
x = bfd_set_section_size (abfd, sec, newsize);
- assert (x == true);
+ gas_assert (x);
/* If the size had to be rounded up, add some padding in the last
non-empty frag. */
- assert (newsize >= size);
+ gas_assert (newsize >= size);
if (size != newsize)
{
fragS *last = seginfo->frchainP->frch_last;
while (fragp->fr_next != last)
fragp = fragp->fr_next;
last->fr_address = size;
- fragp->fr_offset += newsize - size;
+ if ((newsize - size) % fragp->fr_var == 0)
+ fragp->fr_offset += (newsize - size) / fragp->fr_var;
+ else
+ /* If we hit this abort, it's likely due to subsegs_finish not
+ providing sufficient alignment on the last frag, and the
+ machine dependent code using alignment frags with fr_var
+ greater than 1. */
+ abort ();
}
#ifdef tc_frob_section
#ifdef DEBUG2
static void
-dump_section_relocs (abfd, sec, stream_)
- bfd *abfd ATTRIBUTE_UNUSED;
- asection *sec;
- char *stream_;
+dump_section_relocs (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, FILE *stream)
{
- FILE *stream = (FILE *) stream_;
segment_info_type *seginfo = seg_info (sec);
fixS *fixp = seginfo->fix_root;
#define EMIT_SECTION_SYMBOLS 1
#endif
+/* Resolve U.A.OFFSET_SYM and U.A.SYM fields of RELOC_LIST entries,
+ and check for validity. Convert RELOC_LIST from using U.A fields
+ to U.B fields. */
static void
-adjust_reloc_syms (abfd, sec, xxx)
- bfd *abfd ATTRIBUTE_UNUSED;
- asection *sec;
- PTR xxx ATTRIBUTE_UNUSED;
+resolve_reloc_expr_symbols (void)
+{
+ struct reloc_list *r;
+
+ for (r = reloc_list; r; r = r->next)
+ {
+ expressionS *symval;
+ symbolS *sym;
+ bfd_vma offset, addend;
+ asection *sec;
+ reloc_howto_type *howto;
+
+ resolve_symbol_value (r->u.a.offset_sym);
+ symval = symbol_get_value_expression (r->u.a.offset_sym);
+
+ offset = 0;
+ sym = NULL;
+ if (symval->X_op == O_constant)
+ sym = r->u.a.offset_sym;
+ else if (symval->X_op == O_symbol)
+ {
+ sym = symval->X_add_symbol;
+ offset = symval->X_add_number;
+ symval = symbol_get_value_expression (symval->X_add_symbol);
+ }
+ if (sym == NULL
+ || symval->X_op != O_constant
+ || (sec = S_GET_SEGMENT (sym)) == NULL
+ || !SEG_NORMAL (sec))
+ {
+ as_bad_where (r->file, r->line, _("invalid offset expression"));
+ sec = NULL;
+ }
+ else
+ offset += S_GET_VALUE (sym);
+
+ sym = NULL;
+ addend = r->u.a.addend;
+ if (r->u.a.sym != NULL)
+ {
+ resolve_symbol_value (r->u.a.sym);
+ symval = symbol_get_value_expression (r->u.a.sym);
+ if (symval->X_op == O_constant)
+ sym = r->u.a.sym;
+ else if (symval->X_op == O_symbol)
+ {
+ sym = symval->X_add_symbol;
+ addend += symval->X_add_number;
+ symval = symbol_get_value_expression (symval->X_add_symbol);
+ }
+ if (symval->X_op != O_constant)
+ {
+ as_bad_where (r->file, r->line, _("invalid reloc expression"));
+ sec = NULL;
+ }
+ else if (sym != NULL)
+ symbol_mark_used_in_reloc (sym);
+ }
+ if (sym == NULL)
+ {
+ if (abs_section_sym == NULL)
+ abs_section_sym = section_symbol (absolute_section);
+ sym = abs_section_sym;
+ }
+
+ howto = r->u.a.howto;
+
+ r->u.b.sec = sec;
+ r->u.b.s = symbol_get_bfdsym (sym);
+ r->u.b.r.sym_ptr_ptr = &r->u.b.s;
+ r->u.b.r.address = offset;
+ r->u.b.r.addend = addend;
+ r->u.b.r.howto = howto;
+ }
+}
+
+/* This pass over fixups decides whether symbols can be replaced with
+ section symbols. */
+
+static void
+adjust_reloc_syms (bfd *abfd ATTRIBUTE_UNUSED,
+ asection *sec,
+ void *xxx ATTRIBUTE_UNUSED)
{
segment_info_type *seginfo = seg_info (sec);
fixS *fixp;
point. It is possible to see unresolved expression
symbols, though, since they are not in the regular symbol
table. */
- if (sym != NULL)
- resolve_symbol_value (sym);
+ resolve_symbol_value (sym);
if (fixp->fx_subsy != NULL)
resolve_symbol_value (fixp->fx_subsy);
- /* If this symbol is equated to an undefined symbol, convert
- the fixup to being against that symbol. */
- if (sym != NULL && symbol_equated_reloc_p (sym))
+ /* If this symbol is equated to an undefined or common symbol,
+ convert the fixup to being against that symbol. */
+ while (symbol_equated_reloc_p (sym)
+ || S_IS_WEAKREFR (sym))
{
+ symbolS *newsym = symbol_get_value_expression (sym)->X_add_symbol;
+ if (sym == newsym)
+ break;
fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number;
- sym = symbol_get_value_expression (sym)->X_add_symbol;
- fixp->fx_addsy = sym;
+ fixp->fx_addsy = newsym;
+ sym = newsym;
}
- if (sym != NULL && symbol_mri_common_p (sym))
+ if (symbol_mri_common_p (sym))
{
- /* These symbols are handled specially in fixup_segment. */
- goto done;
+ fixp->fx_offset += S_GET_VALUE (sym);
+ fixp->fx_addsy = symbol_get_value_expression (sym)->X_add_symbol;
+ continue;
}
- symsec = S_GET_SEGMENT (sym);
+ /* If the symbol is undefined, common, weak, or global (ELF
+ shared libs), we can't replace it with the section symbol. */
+ if (S_FORCE_RELOC (fixp->fx_addsy, 1))
+ continue;
+
+ /* 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))
+ continue;
+#endif
+
+ /* Since we're reducing to section symbols, don't attempt to reduce
+ anything that's already using one. */
+ if (symbol_section_p (sym))
+ continue;
+ symsec = S_GET_SEGMENT (sym);
if (symsec == NULL)
abort ();
if (bfd_is_abs_section (symsec))
{
- /* The fixup_segment routine will not use this symbol in a
- relocation unless TC_FORCE_RELOCATION returns 1. */
- if (TC_FORCE_RELOCATION (fixp))
- {
- symbol_mark_used_in_reloc (fixp->fx_addsy);
-#ifdef UNDEFINED_DIFFERENCE_OK
- if (fixp->fx_subsy != NULL)
- symbol_mark_used_in_reloc (fixp->fx_subsy);
-#endif
- }
- goto done;
- }
-
- /* 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 (bfd_is_und_section (symsec)
- || bfd_is_com_section (symsec))
- {
- symbol_mark_used_in_reloc (fixp->fx_addsy);
-#ifdef UNDEFINED_DIFFERENCE_OK
- /* We have the difference of an undefined symbol and some
- other symbol. Make sure to mark the other symbol as used
- in a relocation so that it will always be output. */
- if (fixp->fx_subsy)
- symbol_mark_used_in_reloc (fixp->fx_subsy);
-#endif
- goto done;
+ /* The fixup_segment routine normally will not use this
+ symbol in a relocation. */
+ continue;
}
/* Don't try to reduce relocs which refer to non-local symbols
- in .linkonce sections. It can lead to confusion when a
- debugging section refers to a .linkonce section. I hope
- this will always be correct. */
+ in .linkonce sections. It can lead to confusion when a
+ debugging section refers to a .linkonce section. I hope
+ this will always be correct. */
if (symsec != sec && ! S_IS_LOCAL (sym))
{
- boolean linkonce;
+ if ((symsec->flags & SEC_LINK_ONCE) != 0
+ || (IS_ELF
+ /* The GNU toolchain uses an extension for ELF: a
+ section beginning with the magic string
+ .gnu.linkonce is a linkonce section. */
+ && strncmp (segment_name (symsec), ".gnu.linkonce",
+ sizeof ".gnu.linkonce" - 1) == 0))
+ continue;
+ }
- linkonce = false;
-#ifdef BFD_ASSEMBLER
- if ((bfd_get_section_flags (stdoutput, symsec) & SEC_LINK_ONCE)
- != 0)
- linkonce = true;
-#endif
-#ifdef OBJ_ELF
- /* The GNU toolchain uses an extension for ELF: a section
- beginning with the magic string .gnu.linkonce is a
- linkonce section. */
- if (strncmp (segment_name (symsec), ".gnu.linkonce",
- sizeof ".gnu.linkonce" - 1) == 0)
- linkonce = true;
-#endif
+ /* Never adjust a reloc against local symbol in a merge section
+ with non-zero addend. */
+ if ((symsec->flags & SEC_MERGE) != 0
+ && (fixp->fx_offset != 0 || fixp->fx_subsy != NULL))
+ continue;
- if (linkonce)
- {
- symbol_mark_used_in_reloc (fixp->fx_addsy);
-#ifdef UNDEFINED_DIFFERENCE_OK
- if (fixp->fx_subsy != NULL)
- symbol_mark_used_in_reloc (fixp->fx_subsy);
+ /* Never adjust a reloc against TLS local symbol. */
+ if ((symsec->flags & SEC_THREAD_LOCAL) != 0)
+ continue;
+
+ /* We refetch the segment when calling section_symbol, rather
+ than using symsec, because S_GET_VALUE may wind up changing
+ the section when it calls resolve_symbol_value. */
+ fixp->fx_offset += S_GET_VALUE (sym);
+ fixp->fx_addsy = section_symbol (S_GET_SEGMENT (sym));
+#ifdef DEBUG5
+ fprintf (stderr, "\nadjusted fixup:\n");
+ print_fixup (fixp);
#endif
- goto done;
- }
- }
+ }
- /* Since we're reducing to section symbols, don't attempt to reduce
- anything that's already using one. */
- if (symbol_section_p (sym))
- {
- symbol_mark_used_in_reloc (fixp->fx_addsy);
- goto done;
- }
+ dump_section_relocs (abfd, sec, stderr);
+}
-#ifdef BFD_ASSEMBLER
- /* We can never adjust a reloc against a weak symbol. If we
- did, and the weak symbol was overridden by a real symbol
- somewhere else, then our relocation would be pointing at
- the wrong area of memory. */
- if (S_IS_WEAK (sym))
- {
- symbol_mark_used_in_reloc (fixp->fx_addsy);
- goto done;
- }
+/* fixup_segment()
- /* Never adjust a reloc against local symbol in a merge section. */
- if (symsec->flags & SEC_MERGE)
- {
- symbol_mark_used_in_reloc (fixp->fx_addsy);
- goto done;
- }
-#endif
+ Go through all the fixS's in a segment and see which ones can be
+ handled now. (These consist of fixS where we have since discovered
+ the value of a symbol, or the address of the frag involved.)
+ For each one, call md_apply_fix to put the fix into the frag data.
+
+ Result is a count of how many relocation structs will be needed to
+ handle the remaining fixS's that we couldn't completely handle here.
+ These will be output later by emit_relocations(). */
+
+static long
+fixup_segment (fixS *fixP, segT this_segment)
+{
+ long seg_reloc_count = 0;
+ valueT add_number;
+ fragS *fragP;
+ segT add_symbol_segment = absolute_section;
+
+ if (fixP != NULL && abs_section_sym == NULL)
+ abs_section_sym = section_symbol (absolute_section);
- /* 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))
+ /* 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 we might be able to turn callx/callj into bal
+ anyways in cases where we know the maximum displacement. */
+ if (linkrelax && TC_LINKRELAX_FIXUP (this_segment))
+ {
+ for (; fixP; fixP = fixP->fx_next)
+ if (!fixP->fx_done)
{
- symbol_mark_used_in_reloc (fixp->fx_addsy);
- goto done;
+ if (fixP->fx_addsy == NULL)
+ {
+ /* There was no symbol required by this relocation.
+ However, BFD doesn't really handle relocations
+ without symbols well. So fake up a local symbol in
+ the absolute section. */
+ fixP->fx_addsy = abs_section_sym;
+ }
+ symbol_mark_used_in_reloc (fixP->fx_addsy);
+ if (fixP->fx_subsy != NULL)
+ symbol_mark_used_in_reloc (fixP->fx_subsy);
+ seg_reloc_count++;
}
+ TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count);
+ return seg_reloc_count;
+ }
+
+ for (; fixP; fixP = fixP->fx_next)
+ {
+#ifdef DEBUG5
+ fprintf (stderr, "\nprocessing fixup:\n");
+ print_fixup (fixP);
#endif
- /* 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))
- {
- symbol_mark_used_in_reloc (fixp->fx_addsy);
- goto done;
- }
+ fragP = fixP->fx_frag;
+ know (fragP);
+#ifdef TC_VALIDATE_FIX
+ TC_VALIDATE_FIX (fixP, this_segment, skip);
#endif
+ add_number = fixP->fx_offset;
- /* 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.
+ if (fixP->fx_addsy != NULL)
+ add_symbol_segment = S_GET_SEGMENT (fixP->fx_addsy);
- We refetch the segment when calling section_symbol, rather
- than using symsec, because S_GET_VALUE may wind up changing
- the section when it calls resolve_symbol_value. */
- fixp->fx_offset += S_GET_VALUE (sym);
- fixp->fx_addsy = section_symbol (S_GET_SEGMENT (sym));
- symbol_mark_used_in_reloc (fixp->fx_addsy);
-#ifdef DEBUG5
- fprintf (stderr, "\nadjusted fixup:\n");
- print_fixup (fixp);
+ if (fixP->fx_subsy != NULL)
+ {
+ segT sub_symbol_segment;
+ resolve_symbol_value (fixP->fx_subsy);
+ sub_symbol_segment = S_GET_SEGMENT (fixP->fx_subsy);
+ if (fixP->fx_addsy != NULL
+ && sub_symbol_segment == add_symbol_segment
+ && !TC_FORCE_RELOCATION_SUB_SAME (fixP, add_symbol_segment))
+ {
+ add_number += S_GET_VALUE (fixP->fx_addsy);
+ add_number -= S_GET_VALUE (fixP->fx_subsy);
+ fixP->fx_offset = add_number;
+ fixP->fx_addsy = NULL;
+ fixP->fx_subsy = NULL;
+#ifdef TC_M68K
+ /* See the comment below about 68k weirdness. */
+ fixP->fx_pcrel = 0;
#endif
+ }
+ else if (sub_symbol_segment == absolute_section
+ && !TC_FORCE_RELOCATION_SUB_ABS (fixP, add_symbol_segment))
+ {
+ add_number -= S_GET_VALUE (fixP->fx_subsy);
+ fixP->fx_offset = add_number;
+ fixP->fx_subsy = NULL;
+ }
+ else if (sub_symbol_segment == this_segment
+ && !TC_FORCE_RELOCATION_SUB_LOCAL (fixP, add_symbol_segment))
+ {
+ add_number -= S_GET_VALUE (fixP->fx_subsy);
+ fixP->fx_offset = (add_number + fixP->fx_dot_value
+ + fixP->fx_frag->fr_address);
+
+ /* Make it pc-relative. If the back-end code has not
+ selected a pc-relative reloc, cancel the adjustment
+ we do later on all pc-relative relocs. */
+ if (0
+#ifdef TC_M68K
+ /* Do this for m68k even if it's already described
+ as pc-relative. On the m68k, an operand of
+ "pc@(foo-.-2)" should address "foo" in a
+ pc-relative mode. */
+ || 1
+#endif
+ || !fixP->fx_pcrel)
+ add_number += MD_PCREL_FROM_SECTION (fixP, this_segment);
+ fixP->fx_subsy = NULL;
+ fixP->fx_pcrel = 1;
+ }
+ else if (!TC_VALIDATE_FIX_SUB (fixP, add_symbol_segment))
+ {
+ if (!md_register_arithmetic
+ && (add_symbol_segment == reg_section
+ || sub_symbol_segment == reg_section))
+ as_bad_where (fixP->fx_file, fixP->fx_line,
+ _("register value used as expression"));
+ else
+ as_bad_where (fixP->fx_file, fixP->fx_line,
+ _("can't resolve `%s' {%s section} - `%s' {%s section}"),
+ fixP->fx_addsy ? S_GET_NAME (fixP->fx_addsy) : "0",
+ segment_name (add_symbol_segment),
+ S_GET_NAME (fixP->fx_subsy),
+ segment_name (sub_symbol_segment));
+ }
+ }
- done:
- ;
- }
-#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. */
+ if (fixP->fx_addsy)
+ {
+ if (add_symbol_segment == this_segment
+ && !TC_FORCE_RELOCATION_LOCAL (fixP))
+ {
+ /* This fixup was made when the symbol's segment was
+ SEG_UNKNOWN, but it is now in the local segment.
+ So we know how to do the address without relocation. */
+ add_number += S_GET_VALUE (fixP->fx_addsy);
+ fixP->fx_offset = add_number;
+ if (fixP->fx_pcrel)
+ add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment);
+ fixP->fx_addsy = NULL;
+ fixP->fx_pcrel = 0;
+ }
+ else if (add_symbol_segment == absolute_section
+ && !TC_FORCE_RELOCATION_ABS (fixP))
+ {
+ add_number += S_GET_VALUE (fixP->fx_addsy);
+ fixP->fx_offset = add_number;
+ fixP->fx_addsy = NULL;
+ }
+ else if (add_symbol_segment != undefined_section
+ && ! bfd_is_com_section (add_symbol_segment)
+ && MD_APPLY_SYM_VALUE (fixP))
+ add_number += S_GET_VALUE (fixP->fx_addsy);
+ }
+
+ if (fixP->fx_pcrel)
+ {
+ add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment);
+ if (!fixP->fx_done && fixP->fx_addsy == NULL)
+ {
+ /* There was no symbol required by this relocation.
+ However, BFD doesn't really handle relocations
+ without symbols well. So fake up a local symbol in
+ the absolute section. */
+ fixP->fx_addsy = abs_section_sym;
+ }
+ }
+
+ if (!fixP->fx_done)
+ md_apply_fix (fixP, &add_number, this_segment);
+
+ if (!fixP->fx_done)
+ {
+ ++seg_reloc_count;
+ if (fixP->fx_addsy == NULL)
+ fixP->fx_addsy = abs_section_sym;
+ symbol_mark_used_in_reloc (fixP->fx_addsy);
+ if (fixP->fx_subsy != NULL)
+ symbol_mark_used_in_reloc (fixP->fx_subsy);
+ }
+
+ if (!fixP->fx_bit_fixP && !fixP->fx_no_overflow && fixP->fx_size != 0)
+ {
+ if (fixP->fx_size < sizeof (valueT))
+ {
+ valueT mask;
- fixp->fx_addsy = section_symbol (absolute_section);
-#if 0
- fixp->fx_addsy->sy_used_in_reloc = 1;
+ mask = 0;
+ mask--; /* Set all bits to one. */
+ mask <<= fixP->fx_size * 8 - (fixP->fx_signed ? 1 : 0);
+ if ((add_number & mask) != 0 && (add_number & mask) != mask)
+ {
+ char buf[50], buf2[50];
+ sprint_value (buf, fragP->fr_address + fixP->fx_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, fixP->fx_size, buf);
+ } /* Generic error checking. */
+ }
+#ifdef WARN_SIGNED_OVERFLOW_WORD
+ /* Warn if a .word value is too large when treated as a signed
+ number. We already know it is not too negative. This is to
+ catch over-large switches generated by gcc on the 68k. */
+ if (!flag_signed_overflow_ok
+ && fixP->fx_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,
+ (long) (fragP->fr_address + fixP->fx_where));
#endif
- }
+ } /* Not a bit fix. */
+
+#ifdef TC_VALIDATE_FIX
+ skip: ATTRIBUTE_UNUSED_LABEL
+ ;
+#endif
+#ifdef DEBUG5
+ fprintf (stderr, "result:\n");
+ print_fixup (fixP);
#endif
+ } /* For each fixS in this segment. */
- dump_section_relocs (abfd, sec, stderr);
+ TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count);
+ return seg_reloc_count;
+}
+
+static void
+fix_segment (bfd *abfd ATTRIBUTE_UNUSED,
+ asection *sec,
+ void *xxx ATTRIBUTE_UNUSED)
+{
+ segment_info_type *seginfo = seg_info (sec);
+
+ fixup_segment (seginfo->fix_root, sec);
}
static void
-write_relocs (abfd, sec, xxx)
- bfd *abfd;
- asection *sec;
- PTR xxx ATTRIBUTE_UNUSED;
+install_reloc (asection *sec, arelent *reloc, fragS *fragp,
+ char *file, unsigned int line)
+{
+ char *err;
+ bfd_reloc_status_type s;
+ asymbol *sym;
+
+ if (reloc->sym_ptr_ptr != NULL
+ && (sym = *reloc->sym_ptr_ptr) != NULL
+ && (sym->flags & BSF_KEEP) == 0
+ && ((sym->flags & BSF_SECTION_SYM) == 0
+ || (EMIT_SECTION_SYMBOLS
+ && !bfd_is_abs_section (sym->section))))
+ as_bad_where (file, line, _("redefined symbol cannot be used on reloc"));
+
+ s = bfd_install_relocation (stdoutput, reloc,
+ fragp->fr_literal, fragp->fr_address,
+ sec, &err);
+ switch (s)
+ {
+ case bfd_reloc_ok:
+ break;
+ case bfd_reloc_overflow:
+ as_bad_where (file, line, _("relocation overflow"));
+ break;
+ case bfd_reloc_outofrange:
+ as_bad_where (file, line, _("relocation out of range"));
+ break;
+ default:
+ as_fatal (_("%s:%u: bad return from bfd_install_relocation: %x"),
+ file, line, s);
+ }
+}
+
+static void
+write_relocs (bfd *abfd, asection *sec, void *xxx ATTRIBUTE_UNUSED)
{
segment_info_type *seginfo = seg_info (sec);
unsigned int i;
unsigned int n;
+ struct reloc_list *my_reloc_list, **rp, *r;
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 **) xmalloc (n * sizeof (arelent *));
- memset ((char *) relocs, 0, n * sizeof (arelent *));
-
- i = 0;
- for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next)
- {
- arelent *reloc;
- bfd_reloc_status_type s;
- symbolS *sym;
-
- if (fixp->fx_done)
- {
- n--;
- continue;
- }
-
- /* If this is an undefined symbol which was equated to another
- symbol, then generate the reloc against the latter symbol
- rather than the former. */
- sym = fixp->fx_addsy;
- while (symbol_equated_reloc_p (sym))
- {
- symbolS *n;
-
- /* We must avoid looping, as that can occur with a badly
- written program. */
- n = symbol_get_value_expression (sym)->X_add_symbol;
- if (n == sym)
- break;
- fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number;
- sym = n;
- }
- fixp->fx_addsy = sym;
-
- reloc = tc_gen_reloc (sec, fixp);
- if (!reloc)
- {
- n--;
- continue;
- }
+ if (!fixp->fx_done)
+ n++;
-#if 0
- /* This test is triggered inappropriately for the SH. */
- if (fixp->fx_where + fixp->fx_size
- > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset)
- abort ();
+#ifdef RELOC_EXPANSION_POSSIBLE
+ n *= MAX_RELOC_EXPANSION;
#endif
- s = bfd_install_relocation (stdoutput, reloc,
- fixp->fx_frag->fr_literal,
- fixp->fx_frag->fr_address,
- sec, &err);
- switch (s)
+ /* Extract relocs for this section from reloc_list. */
+ rp = &reloc_list;
+ my_reloc_list = NULL;
+ while ((r = *rp) != NULL)
+ {
+ if (r->u.b.sec == sec)
{
- case bfd_reloc_ok:
- break;
- case bfd_reloc_overflow:
- as_bad_where (fixp->fx_file, fixp->fx_line, _("relocation overflow"));
- break;
- case bfd_reloc_outofrange:
- as_bad_where (fixp->fx_file, fixp->fx_line, _("relocation out of range"));
- break;
- default:
- as_fatal (_("%s:%u: bad return from bfd_install_relocation: %x"),
- fixp->fx_file, fixp->fx_line, s);
+ *rp = r->next;
+ r->next = my_reloc_list;
+ my_reloc_list = r;
+ n++;
}
- relocs[i++] = reloc;
+ else
+ rp = &r->next;
}
-#else
- n = n * MAX_RELOC_EXPANSION;
- /* Set up reloc information as well. */
- relocs = (arelent **) xmalloc (n * sizeof (arelent *));
+
+ relocs = (arelent **) xcalloc (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;
- symbolS *sym;
int j;
+ int fx_size, slack;
+ offsetT loc;
if (fixp->fx_done)
- {
- n--;
- continue;
- }
+ continue;
+
+ fx_size = fixp->fx_size;
+ slack = TC_FX_SIZE_SLACK (fixp);
+ if (slack > 0)
+ fx_size = fx_size > slack ? fx_size - slack : 0;
+ loc = fixp->fx_where + fx_size;
+ if (slack >= 0 && loc > fixp->fx_frag->fr_fix)
+ as_bad_where (fixp->fx_file, fixp->fx_line,
+ _("internal error: fixup not contained within frag"));
- /* If this is an undefined symbol which was equated to another
- symbol, then generate the reloc against the latter symbol
- rather than the former. */
- sym = fixp->fx_addsy;
- while (symbol_equated_reloc_p (sym))
- sym = symbol_get_value_expression (sym)->X_add_symbol;
- fixp->fx_addsy = sym;
+#ifndef RELOC_EXPANSION_POSSIBLE
+ {
+ arelent *reloc = tc_gen_reloc (sec, fixp);
- reloc = tc_gen_reloc (sec, fixp);
+ if (!reloc)
+ continue;
+ relocs[i++] = reloc;
+ j = 1;
+ }
+#else
+ {
+ arelent **reloc = tc_gen_reloc (sec, fixp);
- for (j = 0; reloc[j]; j++)
- {
+ 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)
- as_bad_where (fixp->fx_file, fixp->fx_line,
- _("internal error: fixup not contained within frag"));
- for (j = 0; reloc[j]; j++)
- {
- 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;
- 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_install_relocation"),
- fixp->fx_file, fixp->fx_line);
- }
- }
+ }
+#endif
+
+ for ( ; j != 0; --j)
+ install_reloc (sec, relocs[i - j], fixp->fx_frag,
+ fixp->fx_file, fixp->fx_line);
}
n = i;
-#endif
#ifdef DEBUG4
{
- int i, j, nsyms;
+ unsigned int i, j, nsyms;
asymbol **sympp;
sympp = bfd_get_outsymbols (stdoutput);
nsyms = bfd_get_symcount (stdoutput);
}
#endif
+ for (r = my_reloc_list; r != NULL; r = r->next)
+ {
+ fragS *f;
+ for (f = seginfo->frchainP->frch_root; f; f = f->fr_next)
+ if (f->fr_address <= r->u.b.r.address
+ && r->u.b.r.address < f->fr_address + f->fr_fix)
+ break;
+ if (f == NULL)
+ as_bad_where (r->file, r->line,
+ _("reloc not within (fixed part of) section"));
+ else
+ {
+ relocs[n++] = &r->u.b.r;
+ install_reloc (sec, &r->u.b.r, f, r->file, r->line);
+ }
+ }
+
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));
+ {
+ flagword flags = bfd_get_section_flags (abfd, sec);
+ flags |= SEC_RELOC;
+ bfd_set_section_flags (abfd, sec, flags);
+ bfd_set_reloc (stdoutput, sec, relocs, n);
+ }
#ifdef SET_SECTION_RELOCS
SET_SECTION_RELOCS (sec, relocs, n);
#ifdef DEBUG3
{
- int i;
+ unsigned int i;
arelent *r;
asymbol *s;
fprintf (stderr, "relocs for sec %s\n", sec->name);
{
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);
+ fprintf (stderr, " reloc %2d @%p off %4lx : sym %-10s addend %lx\n",
+ i, r, (unsigned long)r->address, s->name, (unsigned long)r->addend);
}
}
#endif
}
static void
-write_contents (abfd, sec, xxx)
- bfd *abfd ATTRIBUTE_UNUSED;
- asection *sec;
- PTR xxx ATTRIBUTE_UNUSED;
+write_contents (bfd *abfd ATTRIBUTE_UNUSED,
+ asection *sec,
+ void *xxx ATTRIBUTE_UNUSED)
{
segment_info_type *seginfo = seg_info (sec);
- unsigned long offset = 0;
+ addressT offset = 0;
fragS *f;
/* Write out the frags. */
f = f->fr_next)
{
int x;
- unsigned long fill_size;
+ addressT fill_size;
char *fill_literal;
- long count;
+ offsetT count;
- assert (f->fr_type == rs_fill);
+ gas_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 (EXIT_FAILURE);
- }
+ if (!x)
+ as_fatal (_("can't write %s: %s"), stdoutput->filename,
+ bfd_errmsg (bfd_get_error ()));
offset += f->fr_fix;
}
fill_literal = f->fr_literal + f->fr_fix;
fill_size = f->fr_var;
count = f->fr_offset;
- assert (count >= 0);
+ gas_assert (count >= 0);
if (fill_size && count)
{
char buf[256];
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);
- }
+ if (!x)
+ as_fatal (_("can't write %s: %s"), stdoutput->filename,
+ bfd_errmsg (bfd_get_error ()));
offset += fill_size;
}
}
x = bfd_set_section_contents
(stdoutput, sec, buf, (file_ptr) offset,
(bfd_size_type) n_per_buf * fill_size);
- if (x != true)
+ if (!x)
as_fatal (_("cannot write to output file"));
offset += n_per_buf * fill_size;
}
}
}
}
-#endif
-#if defined(BFD_ASSEMBLER) || (!defined (BFD) && !defined(OBJ_AOUT))
static void
-merge_data_into_text ()
+merge_data_into_text (void)
{
-#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);
-
- /* Now the addresses of frags are correct within the segment. */
- know (text_last_frag->fr_type == rs_fill && text_last_frag->fr_offset == 0);
- H_SET_TEXT_SIZE (&headers, text_last_frag->fr_address);
- text_last_frag->fr_address = H_GET_TEXT_SIZE (&headers);
-
- /* Join the 2 segments into 1 huge segment.
- To do this, re-compute every rn_address in the SEG_DATA frags.
- Then join the data frags after the text frags.
-
- Determine a_data [length of data segment]. */
- if (data_frag_root)
- {
- register relax_addressT slide;
-
- know ((text_last_frag->fr_type == rs_fill)
- && (text_last_frag->fr_offset == 0));
-
- H_SET_DATA_SIZE (&headers, data_last_frag->fr_address);
- data_last_frag->fr_address = H_GET_DATA_SIZE (&headers);
- slide = H_GET_TEXT_SIZE (&headers); /* & in file of the data segment. */
-#ifdef OBJ_BOUT
-#define RoundUp(N,S) (((N)+(S)-1)&-(S))
- /* For b.out: If the data section has a strict alignment
- requirement, its load address in the .o file will be
- rounded up from the size of the text section. These
- two values are *not* the same! Similarly for the bss
- section.... */
- slide = RoundUp (slide, 1 << section_alignment[SEG_DATA]);
-#endif
-
- for (fragP = data_frag_root; fragP; fragP = fragP->fr_next)
- fragP->fr_address += slide;
-
- know (text_last_frag != 0);
- text_last_frag->fr_next = data_frag_root;
- }
- else
- {
- H_SET_DATA_SIZE (&headers, 0);
- }
-
-#ifdef OBJ_BOUT
- /* See above comments on b.out data section address. */
- {
- long bss_vma;
- if (data_last_frag == 0)
- bss_vma = H_GET_TEXT_SIZE (&headers);
- else
- bss_vma = data_last_frag->fr_address;
- bss_vma = RoundUp (bss_vma, 1 << section_alignment[SEG_BSS]);
- bss_address_frag.fr_address = bss_vma;
- }
-#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;
-
- for (fragP = bss_frag_root; fragP; fragP = fragP->fr_next)
- fragP->fr_address += slide;
- }
-
- 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 ()
+set_symtab (void)
{
int nsyms;
asymbol **asympp;
symbolS *symp;
- boolean result;
- extern PTR bfd_alloc PARAMS ((bfd *, bfd_size_type));
+ bfd_boolean result;
/* 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
for (i = 0; i < nsyms; i++, symp = symbol_next (symp))
{
asympp[i] = symbol_get_bfdsym (symp);
+ if (asympp[i]->flags != BSF_SECTION_SYM
+ || !(bfd_is_const_section (asympp[i]->section)
+ && asympp[i]->section->symbol == asympp[i]))
+ asympp[i]->flags |= BSF_KEEP;
symbol_mark_written (symp);
}
}
else
asympp = 0;
result = bfd_set_symtab (stdoutput, asympp, nsyms);
- assert (result == true);
+ gas_assert (result);
symbol_table_frozen = 1;
}
-#endif
-
-#if defined (BFD_ASSEMBLER) && defined (OBJ_COFF) && defined (TE_GO32)
-static void
-set_segment_vma (abfd, sec, xxx)
- bfd *abfd;
- asection *sec;
- PTR xxx ATTRIBUTE_UNUSED;
-{
- static bfd_vma addr = 0;
-
- bfd_set_section_vma (abfd, sec, addr);
- addr += bfd_section_size (abfd, sec);
-}
-#endif /* BFD_ASSEMBLER && OBJ_COFF && !TE_PE */
/* Finish the subsegments. After every sub-segment, we fake an
".align ...". This conforms to BSD4.2 brane-damage. We then fake
makes calculating their intended length trivial. */
#ifndef SUB_SEGMENT_ALIGN
-#ifdef BFD_ASSEMBLER
-#define SUB_SEGMENT_ALIGN(SEG) (0)
+#ifdef HANDLE_ALIGN
+/* The last subsegment gets an alignment corresponding to the alignment
+ of the section. This allows proper nop-filling at the end of
+ code-bearing sections. */
+#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \
+ (!(FRCHAIN)->frch_next ? get_recorded_alignment (SEG) : 0)
#else
-#define SUB_SEGMENT_ALIGN(SEG) (2)
+#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
#endif
#endif
void
-subsegs_finish ()
+subsegs_finish (void)
{
struct frchain *frchainP;
+ asection *s;
- for (frchainP = frchain_root; frchainP; frchainP = frchainP->frch_next)
+ for (s = stdoutput->sections; s; s = s->next)
{
- int alignment;
+ segment_info_type *seginfo = seg_info (s);
+ if (!seginfo)
+ continue;
- subseg_set (frchainP->frch_seg, frchainP->frch_subseg);
+ for (frchainP = seginfo->frchainP;
+ frchainP != NULL;
+ frchainP = frchainP->frch_next)
+ {
+ int alignment = 0;
- /* This now gets called even if we had errors. In that case,
- any alignment is meaningless, and, moreover, will look weird
- if we are generating a listing. */
- alignment = had_errors () ? 0 : SUB_SEGMENT_ALIGN (now_seg);
+ subseg_set (s, frchainP->frch_subseg);
- /* The last subsegment gets an aligment corresponding to the
- alignment of the section. This allows proper nop-filling
- at the end of code-bearing sections. */
- if (!frchainP->frch_next || frchainP->frch_next->frch_seg != now_seg)
- alignment = get_recorded_alignment (now_seg);
+ /* This now gets called even if we had errors. In that case,
+ any alignment is meaningless, and, moreover, will look weird
+ if we are generating a listing. */
+ if (!had_errors ())
+ {
+ alignment = SUB_SEGMENT_ALIGN (now_seg, frchainP);
+ if ((bfd_get_section_flags (now_seg->owner, now_seg) & SEC_MERGE)
+ && now_seg->entsize)
+ {
+ unsigned int entsize = now_seg->entsize;
+ int entalign = 0;
- if (subseg_text_p (now_seg))
- frag_align_code (alignment, 0);
- else
- frag_align (alignment, 0, 0);
+ while ((entsize & 1) == 0)
+ {
+ ++entalign;
+ entsize >>= 1;
+ }
+ if (entalign > alignment)
+ alignment = entalign;
+ }
+ }
- /* frag_align will have left a new frag.
- Use this last frag for an empty ".fill".
+ if (subseg_text_p (now_seg))
+ frag_align_code (alignment, 0);
+ else
+ frag_align (alignment, 0, 0);
+
+ /* 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);
+ 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);
+ }
}
}
/* Write the object file. */
void
-write_object_file ()
+write_object_file (void)
{
-#if ! defined (BFD_ASSEMBLER) || ! defined (WORKING_DOT_WORD)
+ struct relax_seg_info rsi;
+#ifndef WORKING_DOT_WORD
fragS *fragP; /* Track along all frags. */
#endif
/* 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;
int i;
- 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_section_list_remove (stdoutput, reg_section);
+ bfd_section_list_remove (stdoutput, expr_section);
+ stdoutput->section_count -= 2;
i = 0;
bfd_map_over_sections (stdoutput, renumber_sections, &i);
}
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
+ rsi.pass = 0;
while (1)
{
- int changed;
-
#ifndef WORKING_DOT_WORD
/* We need to reset the markers in the broken word list and
associated frags between calls to relax_segment (via
}
#endif
- changed = 0;
- bfd_map_over_sections (stdoutput, relax_seg, &changed);
- if (!changed)
+ rsi.changed = 0;
+ bfd_map_over_sections (stdoutput, relax_seg, &rsi);
+ rsi.pass++;
+ if (!rsi.changed)
break;
}
finalize_syms = TC_FINALIZE_SYMS_BEFORE_SIZE_SEG;
bfd_map_over_sections (stdoutput, size_seg, (char *) 0);
-#else
- relax_and_size_all_segments ();
-#endif /* BFD_ASSEMBLER */
/* Relaxation has completed. Freeze all syms. */
finalize_syms = 1;
-#if defined (BFD_ASSEMBLER) && defined (OBJ_COFF) && defined (TE_GO32)
- /* Now that the segments have their final sizes, run through the
- sections and set their vma and lma. !BFD gas sets them, and BFD gas
- should too. Currently, only DJGPP uses this code, but other
- COFF targets may need to execute this too. */
- bfd_map_over_sections (stdoutput, set_segment_vma, (char *) 0);
-#endif
-
-#ifndef BFD_ASSEMBLER
- /* Crawl the symbol chain.
-
- For each symbol whose value depends on a frag, take the address of
- that frag and subsume it into the value of the symbol.
- After this, there is just one way to lookup a symbol value.
- Values are left in their final state for object file emission.
- We adjust the values of 'L' local symbols, even if we do
- not intend to emit them to the object file, because their values
- are needed for fix-ups.
-
- Unless we saw a -L flag, remove all symbols that begin with 'L'
- from the symbol chain. (They are still pointed to by the fixes.)
-
- Count the remaining symbols.
- 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;
-
- 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)
- {
- /* At this point we have linked all the frags into a single
- chain. However, cvt_frag_to_fill may call md_convert_frag
- which may call fix_new. We need to ensure that fix_new adds
- the fixup to the right section. */
- if (fragP == data_frag_root)
- subseg_change (SEG_DATA, 0);
-
- cvt_frag_to_fill (&headers, SEG_TEXT, fragP);
-
- /* 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
-#endif
- || ((fragP->fr_next->fr_address - fragP->fr_address)
- == (fragP->fr_fix + fragP->fr_offset * fragP->fr_var))))
- abort ();
+#ifdef md_post_relax_hook
+ md_post_relax_hook;
#endif
- }
-#endif /* ! BFD_ASSEMBLER */
#ifndef WORKING_DOT_WORD
{
exp.X_add_symbol = lie->add;
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,
lie->word_goes_here - lie->frag->fr_literal,
2, &exp, 0, BFD_RELOC_16);
#endif
-#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_exp (lie->frag,
- lie->word_goes_here - lie->frag->fr_literal,
- 2, &exp, 0, 0, 2, 0, 0);
-#else
- fix_new_exp (lie->frag,
- lie->word_goes_here - lie->frag->fr_literal,
- 2, &exp, 0, 0);
-#endif /* TC_NS32K */
-#endif /* TC_SPARC|TC_A29K|NEED_FX_R_TYPE */
-#endif /* BFD_ASSEMBLER */
*prevP = lie->next_broken_word;
}
else
if (lie->added == 2)
continue;
/* Patch the jump table. */
- /* This is the offset from ??? to table_ptr+0. */
- to_addr = table_addr - S_GET_VALUE (lie->sub);
-#ifdef TC_CHECK_ADJUSTED_BROKEN_DOT_WORD
- TC_CHECK_ADJUSTED_BROKEN_DOT_WORD (to_addr, lie);
-#endif
- md_number_to_chars (lie->word_goes_here, to_addr, 2);
- for (untruth = lie->next_broken_word;
+ for (untruth = (struct broken_word *) (fragP->fr_symbol);
untruth && untruth->dispfrag == fragP;
untruth = untruth->next_broken_word)
{
if (untruth->use_jump == lie)
- md_number_to_chars (untruth->word_goes_here, to_addr, 2);
+ {
+ /* This is the offset from ??? to table_ptr+0.
+ The target is the same for all users of this
+ md_long_jump, but the "sub" bases (and hence the
+ offsets) may be different. */
+ addressT to_word = table_addr - S_GET_VALUE (untruth->sub);
+#ifdef TC_CHECK_ADJUSTED_BROKEN_DOT_WORD
+ TC_CHECK_ADJUSTED_BROKEN_DOT_WORD (to_word, untruth);
+#endif
+ md_number_to_chars (untruth->word_goes_here, to_word, 2);
+ }
}
/* Install the long jump. */
}
#endif /* not WORKING_DOT_WORD */
-#ifndef BFD_ASSEMBLER
-#ifndef OBJ_VMS
- { /* not vms */
- char *the_object_file;
- 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);
- subseg_change (SEG_DATA, 0);
- 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_MAGIC_NUMBER (&headers, magic_number_for_object_file);
- H_SET_ENTRY_POINT (&headers, 0);
-
- obj_pre_write_hook (&headers); /* Extra coff stuff. */
-
- object_file_size = H_GET_FILE_SIZE (&headers);
- next_object_file_charP = the_object_file = xmalloc (object_file_size);
-
- output_file_create (out_file_name);
-
- obj_header_append (&next_object_file_charP, &headers);
-
- know ((next_object_file_charP - the_object_file)
- == H_GET_HEADER_SIZE (&headers));
-
- /* Emit code. */
- for (fragP = text_frag_root; fragP; fragP = fragP->fr_next)
- {
- register long count;
- register char *fill_literal;
- register long fill_size;
-
- PROGRESS (1);
- know (fragP->fr_type == rs_fill);
- append (&next_object_file_charP, fragP->fr_literal,
- (unsigned long) fragP->fr_fix);
- fill_literal = fragP->fr_literal + fragP->fr_fix;
- fill_size = fragP->fr_var;
- know (fragP->fr_offset >= 0);
-
- for (count = fragP->fr_offset; count; count--)
- append (&next_object_file_charP, fill_literal,
- (unsigned long) fill_size);
- }
-
- 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. */
- 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. */
- 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);
-#endif /* TC_I960 */
-
- 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. */
- 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)));
-
- /* Emit symbols. */
- obj_emit_symbols (&next_object_file_charP, symbol_rootP);
- 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)));
-
- /* Emit strings. */
- if (string_byte_count > 0)
- obj_emit_strings (&next_object_file_charP);
-
-#ifdef BFD_HEADERS
- bfd_seek (stdoutput, (file_ptr) 0, 0);
- bfd_bwrite (the_object_file, (bfd_size_type) object_file_size, stdoutput);
-#else
-
- /* Write the data to the file. */
- output_file_append (the_object_file, object_file_size, out_file_name);
- free (the_object_file);
-#endif
- }
-#else /* OBJ_VMS */
- /* Now do the VMS-dependent part of writing the object file. */
- 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 /* OBJ_VMS */
-#else /* BFD_ASSEMBLER */
-
/* Resolve symbol values. This needs to be done before processing
the relocations. */
if (symbol_rootP)
resolve_symbol_value (symp);
}
resolve_local_symbol_values ();
+ resolve_reloc_expr_symbols ();
PROGRESS (1);
bfd_map_over_sections (stdoutput, adjust_reloc_syms, (char *) 0);
+#ifdef tc_frob_file_before_fix
+ tc_frob_file_before_fix ();
+#endif
+#ifdef obj_frob_file_before_fix
+ obj_frob_file_before_fix ();
+#endif
+
+ bfd_map_over_sections (stdoutput, fix_segment, (char *) 0);
+
/* Set up symbol table, and write it out. */
if (symbol_rootP)
{
symbolS *symp;
+ bfd_boolean skip_next_symbol = FALSE;
for (symp = symbol_rootP; symp; symp = symbol_next (symp))
{
int punt = 0;
const char *name;
+ if (skip_next_symbol)
+ {
+ /* Don't do anything besides moving the value of the
+ symbol from the GAS value-field to the BFD value-field. */
+ symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp);
+ skip_next_symbol = FALSE;
+ continue;
+ }
+
if (symbol_mri_common_p (symp))
{
if (S_IS_EXTERNAL (symp))
resolve_symbol_value (symp);
/* Skip symbols which were equated to undefined or common
- symbols. */
- if (symbol_equated_reloc_p (symp))
+ symbols. */
+ if (symbol_equated_reloc_p (symp)
+ || S_IS_WEAKREFR (symp))
{
+ const char *sname = S_GET_NAME (symp);
+
+ if (S_IS_COMMON (symp)
+ && !TC_FAKE_LABEL (sname)
+ && !S_IS_WEAKREFR (symp)
+ && (!S_IS_EXTERNAL (symp) || S_IS_LOCAL (symp)))
+ {
+ expressionS *e = symbol_get_value_expression (symp);
+
+ as_bad (_("Local symbol `%s' can't be equated to common symbol `%s'"),
+ sname, S_GET_NAME (e->X_add_symbol));
+ }
+ if (S_GET_SEGMENT (symp) == reg_section)
+ {
+ /* Report error only if we know the symbol name. */
+ if (S_GET_NAME (symp) != reg_section->name)
+ as_bad (_("can't make global register symbol `%s'"),
+ sname);
+ }
symbol_remove (symp, &symbol_rootP, &symbol_lastP);
continue;
}
- /* 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_ptr);
-#if 0
- printf ("symbol `%s'\n\t@%x: value=%d flags=%x seg=%s\n",
- S_GET_NAME (symp), symp,
- S_GET_VALUE (symp),
- symbol_get_bfdsym (symp)->flags,
- segment_name (S_GET_SEGMENT (symp)));
-#endif
-
#ifdef obj_frob_symbol
obj_frob_symbol (symp, punt);
#endif
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
- && symbol_section_p (symp))
- /* Note that S_IS_EXTERN and S_IS_LOCAL are not always
+ if (symp == abs_section_sym
+ || (! EMIT_SECTION_SYMBOLS
+ && symbol_section_p (symp))
+ /* Note that S_IS_EXTERNAL 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)
+ || (!S_IS_EXTERNAL (symp)
+ && (punt || S_IS_LOCAL (symp) ||
+ (S_IS_WEAKREFD (symp) && ! symbol_used_p (symp)))
&& ! symbol_used_in_reloc_p (symp)))
{
symbol_remove (symp, &symbol_rootP, &symbol_lastP);
/* Set the value into the BFD symbol. Up til now the value
has only been kept in the gas symbolS struct. */
symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp);
+
+ /* A warning construct is a warning symbol followed by the
+ symbol warned about. Don't let anything object-format or
+ target-specific muck with it; it's ready for output. */
+ if (symbol_get_bfdsym (symp)->flags & BSF_WARNING)
+ skip_next_symbol = TRUE;
}
}
obj_adjust_symtab ();
#endif
+ /* Stop if there is an error. */
+ if (had_errors ())
+ return;
+
/* Now that all the sizes are known, and contents correct, we can
start writing to the file. */
set_symtab ();
#ifdef obj_frob_file
obj_frob_file ();
#endif
-
+#ifdef obj_coff_generate_pdata
+ obj_coff_generate_pdata ();
+#endif
bfd_map_over_sections (stdoutput, write_relocs, (char *) 0);
#ifdef tc_frob_file_after_relocs
#endif
bfd_map_over_sections (stdoutput, write_contents, (char *) 0);
-#endif /* BFD_ASSEMBLER */
}
-#endif /* ! BFD */
#ifdef TC_GENERIC_RELAX_TABLE
-
/* Relax a fragment by scanning TC_GENERIC_RELAX_TABLE. */
long
-relax_frag (segment, fragP, stretch)
- segT segment;
- fragS *fragP;
- long stretch;
+relax_frag (segT segment, fragS *fragP, long stretch)
{
const relax_typeS *this_type;
const relax_typeS *start_type;
relax_substateT next_state;
relax_substateT this_state;
- long growth;
+ offsetT growth;
offsetT aim;
addressT target;
addressT address;
sym_frag = symbol_get_frag (symbolP);
#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 (sym_frag != NULL);
#endif
- know (!(S_GET_SEGMENT (symbolP) == absolute_section)
+ know (S_GET_SEGMENT (symbolP) != absolute_section
|| sym_frag == &zero_address_frag);
target += S_GET_VALUE (symbolP);
#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. */
-#if 0
- assert (fragP->fr_targ.ns32k.pcrel_adjust == 0);
-#endif
#endif
-#ifdef md_prepare_relax_scan /* formerly called M68K_AIM_KLUDGE */
+
+#ifdef md_prepare_relax_scan
+ /* Formerly called M68K_AIM_KLUDGE. */
md_prepare_relax_scan (fragP, address, aim, this_state, this_type);
#endif
/* 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_align (register relax_addressT address, /* Address now. */
+ register int alignment /* Alignment (binary). */)
{
relax_addressT mask;
relax_addressT new_address;
addresses. */
int
-relax_segment (segment_frag_root, segment)
- struct frag *segment_frag_root;
- segT segment;
+relax_segment (struct frag *segment_frag_root, segT segment, int pass)
{
- register struct frag *fragP;
- register relax_addressT address;
+ unsigned long frag_count;
+ struct frag *fragP;
+ relax_addressT address;
int ret;
-#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. */
subseg_change (segment, 0);
/* For each frag in segment: count and store (a 1st guess of)
fr_address. */
address = 0;
- for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next)
+ for (frag_count = 0, fragP = segment_frag_root;
+ fragP;
+ fragP = fragP->fr_next, frag_count ++)
{
fragP->relax_marker = 0;
fragP->fr_address = address;
/* Do relax(). */
{
- long stretch; /* May be any size, 0 or negative. */
- /* Cumulative number of addresses we have relaxed this pass.
- We may have relaxed more than one address. */
- int stretched; /* Have we stretched on this pass? */
- /* This is 'cuz stretch may be zero, when, in fact some piece of code
- grew, and another shrank. If a branch instruction doesn't fit anymore,
- we could be scrod. */
-
+ unsigned long max_iterations;
+
+ /* Cumulative address adjustment. */
+ offsetT stretch;
+
+ /* Have we made any adjustment this pass? We can't just test
+ stretch because one piece of code may have grown and another
+ shrank. */
+ int stretched;
+
+ /* Most horrible, but gcc may give us some exception data that
+ is impossible to assemble, of the form
+
+ .align 4
+ .byte 0, 0
+ .uleb128 end - start
+ start:
+ .space 128*128 - 1
+ .align 4
+ end:
+
+ If the leb128 is two bytes in size, then end-start is 128*128,
+ which requires a three byte leb128. If the leb128 is three
+ bytes in size, then end-start is 128*128-1, which requires a
+ two byte leb128. We work around this dilemma by inserting
+ an extra 4 bytes of alignment just after the .align. This
+ works because the data after the align is accessed relative to
+ the end label.
+
+ This counter is used in a tiny state machine to detect
+ whether a leb128 followed by an align is impossible to
+ relax. */
+ int rs_leb128_fudge = 0;
+
+ /* We want to prevent going into an infinite loop where one frag grows
+ depending upon the location of a symbol which is in turn moved by
+ the growing frag. eg:
+
+ foo = .
+ .org foo+16
+ foo = .
+
+ So we dictate that this algorithm can be at most O2. */
+ max_iterations = frag_count * frag_count;
+ /* Check for overflow. */
+ if (max_iterations < frag_count)
+ max_iterations = frag_count;
+
+ ret = 0;
do
{
stretch = 0;
for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next)
{
- long growth = 0;
+ offsetT growth = 0;
addressT was_address;
offsetT offset;
symbolS *symbolP;
S_GET_NAME (lie->sub),
buf);
}
- lie->added = 1;
if (fragP->fr_subtype == 0)
{
fragP->fr_subtype++;
growth += md_short_jump_size;
}
- for (untruth = lie->next_broken_word;
+
+ /* Redirect *all* words of this table with the same
+ target, lest we have to handle the case where the
+ same target but with a offset that fits on this
+ round overflows at the next relaxation round. */
+ for (untruth = (struct broken_word *) (fragP->fr_symbol);
untruth && untruth->dispfrag == lie->dispfrag;
untruth = untruth->next_broken_word)
if ((symbol_get_frag (untruth->add)
untruth->added = 2;
untruth->use_jump = lie;
}
+
+ lie->added = 1;
growth += md_long_jump_size;
}
}
}
growth = newoff - oldoff;
+
+ /* If this align happens to follow a leb128 and
+ we have determined that the leb128 is bouncing
+ in size, then break the cycle by inserting an
+ extra alignment. */
+ if (growth < 0
+ && (rs_leb128_fudge & 16) != 0
+ && (rs_leb128_fudge & 15) >= 2)
+ {
+ segment_info_type *seginfo = seg_info (segment);
+ struct obstack *ob = &seginfo->frchainP->frch_obstack;
+ struct frag *newf;
+
+ newf = frag_alloc (ob);
+ obstack_blank_fast (ob, fragP->fr_var);
+ obstack_finish (ob);
+ memcpy (newf, fragP, SIZEOF_STRUCT_FRAG);
+ memcpy (newf->fr_literal,
+ fragP->fr_literal + fragP->fr_fix,
+ fragP->fr_var);
+ newf->fr_type = rs_fill;
+ newf->fr_fix = 0;
+ newf->fr_offset = (((offsetT) 1 << fragP->fr_offset)
+ / fragP->fr_var);
+ if (newf->fr_offset * newf->fr_var
+ != (offsetT) 1 << fragP->fr_offset)
+ {
+ newf->fr_offset = (offsetT) 1 << fragP->fr_offset;
+ newf->fr_var = 1;
+ }
+ /* Include growth of new frag, because rs_fill
+ frags don't normally grow. */
+ growth += newf->fr_offset * newf->fr_var;
+ /* The new frag address is newoff. Adjust this
+ for the amount we'll add when we process the
+ new frag. */
+ newf->fr_address = newoff - stretch - growth;
+ newf->relax_marker ^= 1;
+ fragP->fr_next = newf;
+#ifdef DEBUG
+ as_warn (_("padding added"));
+#endif
+ }
}
break;
if (symbolP)
{
-#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));
-#endif
- /* Convert from an actual address to an octet offset
- into the section. Here it is assumed that the
- section's VMA is zero, and can omit subtracting it
- from the symbol's value to get the address offset. */
- know (S_GET_SECTION (symbolP)->vma == 0);
+ /* Convert from an actual address to an octet offset
+ into the section. Here it is assumed that the
+ section's VMA is zero, and can omit subtracting it
+ from the symbol's value to get the address offset. */
+ know (S_GET_SEGMENT (symbolP)->vma == 0);
target += S_GET_VALUE (symbolP) * OCTETS_PER_BYTE;
}
know (fragP->fr_next);
- after = fragP->fr_next->fr_address;
+ after = fragP->fr_next->fr_address + stretch;
growth = target - after;
if (growth < 0)
{
+ growth = 0;
+
+ /* Don't error on first few frag relax passes.
+ The symbol might be an expression involving
+ symbol values from other sections. If those
+ sections have not yet been processed their
+ frags will all have zero addresses, so we
+ will calculate incorrect values for them. The
+ number of passes we allow before giving an
+ error is somewhat arbitrary. It should be at
+ least one, with larger values requiring
+ increasingly contrived dependencies between
+ frags to trigger a false error. */
+ if (pass < 2)
+ {
+ /* Force another pass. */
+ ret = 1;
+ break;
+ }
+
/* Growth may be negative, but variable part of frag
cannot have fewer than 0 chars. That is, we can't
.org backwards. */
as_bad_where (fragP->fr_file, fragP->fr_line,
- _("attempt to .org backwards"));
+ _("attempt to move .org backwards"));
/* We've issued an error message. Change the
- frag to avoid cascading errors. */
+ frag to avoid cascading errors. */
fragP->fr_type = rs_align;
fragP->fr_subtype = 0;
fragP->fr_offset = 0;
fragP->fr_fix = after - address;
- growth = stretch;
}
-
- /* This is an absolute growth factor */
- growth -= stretch;
- break;
}
+ break;
case rs_space:
growth = 0;
}
else if (amount < 0)
{
+ /* Don't error on first few frag relax passes.
+ See rs_org comment for a longer explanation. */
+ if (pass < 2)
+ {
+ ret = 1;
+ break;
+ }
+
as_warn_where (fragP->fr_file, fragP->fr_line,
_(".space or .fill with negative value, ignored"));
fragP->fr_symbol = 0;
case rs_leb128:
{
valueT value;
- int size;
+ offsetT size;
value = resolve_symbol_value (fragP->fr_symbol);
size = sizeof_leb128 (value, fragP->fr_subtype);
{
stretch += growth;
stretched = 1;
+ if (fragP->fr_type == rs_leb128)
+ rs_leb128_fudge += 16;
+ else if (fragP->fr_type == rs_align
+ && (rs_leb128_fudge & 16) != 0
+ && stretch == 0)
+ rs_leb128_fudge += 16;
+ else
+ rs_leb128_fudge = 0;
}
- } /* For each frag in the segment. */
+ }
+
+ if (stretch == 0
+ && (rs_leb128_fudge & 16) == 0
+ && (rs_leb128_fudge & -16) != 0)
+ rs_leb128_fudge += 1;
+ else
+ rs_leb128_fudge = 0;
}
- while (stretched); /* Until nothing further to relax. */
- } /* do_relax */
+ /* Until nothing further to relax. */
+ while (stretched && -- max_iterations);
+
+ if (stretched)
+ as_fatal (_("Infinite loop encountered whilst attempting to compute the addresses of symbols in section %s"),
+ segment_name (segment));
+ }
- ret = 0;
for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next)
if (fragP->last_fr_address != fragP->fr_address)
{
return ret;
}
-#if defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS))
-
-#ifndef TC_RELOC_RTSYM_LOC_FIXUP
-#define TC_RELOC_RTSYM_LOC_FIXUP(X) (1)
-#endif
-
-/* fixup_segment()
-
- Go through all the fixS's in a segment and see which ones can be
- handled now. (These consist of fixS where we have since discovered
- the value of a symbol, or the address of the frag involved.)
- For each one, call md_apply_fix3 to put the fix into the frag data.
-
- Result is a count of how many relocation structs will be needed to
- handle the remaining fixS's that we couldn't completely handle here.
- These will be output later by emit_relocations(). */
-
-static long
-fixup_segment (fixP, this_segment_type)
- register fixS *fixP;
- segT this_segment_type; /* N_TYPE bits for segment. */
-{
- long seg_reloc_count = 0;
- symbolS *add_symbolP;
- symbolS *sub_symbolP;
- valueT add_number;
- int size;
- char *place;
- long where;
- int pcrel, plt;
- fragS *fragP;
- segT add_symbol_segment = absolute_section;
-
- /* If the linker is doing the relaxing, we must not do any fixups.
-
- Well, strictly speaking that's not true -- we could do any that are
- PC-relative and don't cross regions that could change size. And for the
- i960 (the only machine for which we've got a relaxing linker right now),
- we might be able to turn callx/callj into bal anyways in cases where we
- know the maximum displacement. */
- if (linkrelax && TC_LINKRELAX_FIXUP (this_segment_type))
- {
- for (; fixP; fixP = fixP->fx_next)
- seg_reloc_count++;
- TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count);
- return seg_reloc_count;
- }
-
- for (; fixP; fixP = fixP->fx_next)
- {
-#ifdef DEBUG5
- fprintf (stderr, "\nprocessing fixup:\n");
- print_fixup (fixP);
-#endif
-
- fragP = fixP->fx_frag;
- know (fragP);
- where = fixP->fx_where;
- place = fragP->fr_literal + where;
- size = fixP->fx_size;
- add_symbolP = fixP->fx_addsy;
-#ifdef TC_VALIDATE_FIX
- TC_VALIDATE_FIX (fixP, this_segment_type, skip);
-#endif
- sub_symbolP = fixP->fx_subsy;
- add_number = fixP->fx_offset;
- pcrel = fixP->fx_pcrel;
- plt = fixP->fx_plt;
-
- if (add_symbolP != NULL
- && symbol_mri_common_p (add_symbolP))
- {
- know (add_symbolP->sy_value.X_op == O_symbol);
- add_number += S_GET_VALUE (add_symbolP);
- fixP->fx_offset = add_number;
- add_symbolP = fixP->fx_addsy =
- symbol_get_value_expression (add_symbolP)->X_add_symbol;
- }
-
- if (add_symbolP)
- add_symbol_segment = S_GET_SEGMENT (add_symbolP);
-
- if (sub_symbolP)
- {
- resolve_symbol_value (sub_symbolP);
- if (add_symbolP == NULL || add_symbol_segment == absolute_section)
- {
- if (add_symbolP != NULL)
- {
- add_number += S_GET_VALUE (add_symbolP);
- add_symbolP = NULL;
- fixP->fx_addsy = NULL;
- }
-
- /* It's just -sym. */
- if (S_GET_SEGMENT (sub_symbolP) == absolute_section)
- {
- add_number -= S_GET_VALUE (sub_symbolP);
- fixP->fx_subsy = NULL;
- }
- else if (pcrel
- && S_GET_SEGMENT (sub_symbolP) == this_segment_type)
- {
- /* Should try converting to a constant. */
- goto bad_sub_reloc;
- }
- else
- bad_sub_reloc:
- as_bad_where (fixP->fx_file, fixP->fx_line,
- _("negative of non-absolute symbol `%s'"),
- S_GET_NAME (sub_symbolP));
- }
- else if (S_GET_SEGMENT (sub_symbolP) == add_symbol_segment
- && SEG_NORMAL (add_symbol_segment))
- {
- /* Difference of 2 symbols from same segment.
- Can't make difference of 2 undefineds: 'value' means
- something different for N_UNDF. */
-#ifdef TC_I960
- /* Makes no sense to use the difference of 2 arbitrary symbols
- as the target of a call instruction. */
- if (fixP->fx_tcbit)
- as_bad_where (fixP->fx_file, fixP->fx_line,
- _("callj to difference of two symbols"));
-#endif /* TC_I960 */
- add_number += (S_GET_VALUE (add_symbolP)
- - S_GET_VALUE (sub_symbolP));
- if (1
-#ifdef TC_M68K
- /* See the comment below about 68k weirdness. */
- && 0
-#endif
- && pcrel)
- add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment_type);
-
- add_symbolP = NULL;
- pcrel = 0; /* No further pcrel processing. */
-
- /* Let the target machine make the final determination
- as to whether or not a relocation will be needed to
- handle this fixup. */
- if (!TC_FORCE_RELOCATION_SECTION (fixP, this_segment_type))
- {
- fixP->fx_pcrel = 0;
- fixP->fx_addsy = NULL;
- fixP->fx_subsy = NULL;
- }
- }
- else
- {
- /* Different segments in subtraction. */
- know (!(S_IS_EXTERNAL (sub_symbolP)
- && (S_GET_SEGMENT (sub_symbolP) == absolute_section)));
-
- if ((S_GET_SEGMENT (sub_symbolP) == absolute_section))
- add_number -= S_GET_VALUE (sub_symbolP);
-
-#ifdef DIFF_EXPR_OK
- else if (S_GET_SEGMENT (sub_symbolP) == this_segment_type)
- {
- /* Make it pc-relative. */
- if (0
-#ifdef TC_M68K
- /* Do this for m68k even if it's already described
- as pc-relative. On the m68k, an operand of
- "pc@(foo-.-2)" should address "foo" in a
- pc-relative mode. */
- || 1
-#endif
- || !pcrel)
- {
- add_number += MD_PCREL_FROM_SECTION (fixP,
- this_segment_type);
- pcrel = 1;
- fixP->fx_pcrel = 1;
- }
-
- add_number -= S_GET_VALUE (sub_symbolP);
- sub_symbolP = 0;
- fixP->fx_subsy = 0;
- }
-#endif
-#ifdef UNDEFINED_DIFFERENCE_OK
- /* The PA needs this for PIC code generation. We basically
- don't want to do anything if we have the difference of two
- symbols at this point. */
- else if (1)
- {
- /* Leave it alone. */
- }
-#endif
-#ifdef BFD_ASSEMBLER
- else if (fixP->fx_r_type == BFD_RELOC_GPREL32
- || fixP->fx_r_type == BFD_RELOC_GPREL16)
- {
- /* Leave it alone. */
- }
-#endif
- else
- {
- char buf[50];
- sprint_value (buf, fragP->fr_address + where);
- as_bad_where (fixP->fx_file, fixP->fx_line,
- _("subtraction of two symbols in different sections `%s' {%s section} - `%s' {%s section} at file address %s"),
- S_GET_NAME (add_symbolP),
- segment_name (S_GET_SEGMENT (add_symbolP)),
- S_GET_NAME (sub_symbolP),
- segment_name (S_GET_SEGMENT (sub_symbolP)),
- buf);
- }
- }
- }
-
- if (add_symbolP)
- {
- if (add_symbol_segment == this_segment_type && pcrel && !plt
- && TC_RELOC_RTSYM_LOC_FIXUP (fixP))
- {
- /* This fixup was made when the symbol's segment was
- SEG_UNKNOWN, but it is now in the local segment.
- So we know how to do the address without relocation. */
-#ifdef TC_I960
- /* reloc_callj() may replace a 'call' with a 'calls' or a
- 'bal', in which cases it modifies *fixP as appropriate.
- In the case of a 'calls', no further work is required,
- and *fixP has been set up to make the rest of the code
- below a no-op. */
- reloc_callj (fixP);
-#endif /* TC_I960 */
-
- add_number += S_GET_VALUE (add_symbolP);
- add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment_type);
- /* Lie. Don't want further pcrel processing. */
- pcrel = 0;
-
- /* Let the target machine make the final determination
- as to whether or not a relocation will be needed to
- handle this fixup. */
- if (!TC_FORCE_RELOCATION (fixP))
- {
- fixP->fx_pcrel = 0;
- fixP->fx_addsy = NULL;
- }
- }
- else
- {
- if (add_symbol_segment == absolute_section
- && ! pcrel)
- {
-#ifdef TC_I960
- /* See comment about reloc_callj() above. */
- reloc_callj (fixP);
-#endif /* TC_I960 */
- add_number += S_GET_VALUE (add_symbolP);
-
- /* Let the target machine make the final determination
- as to whether or not a relocation will be needed to
- handle this fixup. */
-
- if (!TC_FORCE_RELOCATION (fixP))
- {
- fixP->fx_addsy = NULL;
- add_symbolP = NULL;
- }
- }
- else if (add_symbol_segment == undefined_section
-#ifdef BFD_ASSEMBLER
- || bfd_is_com_section (add_symbol_segment)
- || (bfd_get_section_flags (stdoutput,
- add_symbol_segment)
- & SEC_MERGE) != 0
-#endif
- )
- {
-#ifdef TC_I960
- if ((int) fixP->fx_bit_fixP == 13)
- {
- /* This is a COBR instruction. They have only a
- 13-bit displacement and are only to be used
- for local branches: flag as error, don't generate
- relocation. */
- as_bad_where (fixP->fx_file, fixP->fx_line,
- _("can't use COBR format with external label"));
- fixP->fx_addsy = NULL;
- fixP->fx_done = 1;
- continue;
- } /* COBR. */
-#endif /* TC_I960 */
-
-#ifdef OBJ_COFF
-#ifdef TE_I386AIX
- if (S_IS_COMMON (add_symbolP))
- add_number += S_GET_VALUE (add_symbolP);
-#endif /* TE_I386AIX */
-#endif /* OBJ_COFF */
- ++seg_reloc_count;
- }
- else
- {
- seg_reloc_count++;
- if (TC_FIX_ADJUSTABLE (fixP))
- add_number += S_GET_VALUE (add_symbolP);
- }
- }
- }
-
- if (pcrel)
- {
- add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment_type);
- if (add_symbolP == 0)
- {
-#ifndef BFD_ASSEMBLER
- fixP->fx_addsy = &abs_symbol;
-#else
- fixP->fx_addsy = section_symbol (absolute_section);
-#endif
- symbol_mark_used_in_reloc (fixP->fx_addsy);
- ++seg_reloc_count;
- }
- }
-
- if (!fixP->fx_done)
- md_apply_fix3 (fixP, & add_number, this_segment_type);
-
- if (!fixP->fx_bit_fixP && !fixP->fx_no_overflow && size > 0)
- {
- if ((size_t) size < sizeof (valueT))
- {
- valueT mask;
-
- mask = 0;
- mask--; /* Set all bits to one. */
- mask <<= size * 8 - (fixP->fx_signed ? 1 : 0);
- if ((add_number & mask) != 0 && (add_number & mask) != mask)
- {
- char buf[50], buf2[50];
- sprint_value (buf, fragP->fr_address + where);
- if (add_number > 1000)
- sprint_value (buf2, add_number);
- else
- sprintf (buf2, "%ld", (long) add_number);
- as_bad_where (fixP->fx_file, fixP->fx_line,
- _("value of %s too large for field of %d bytes at %s"),
- buf2, size, buf);
- } /* Generic error checking. */
- }
-#ifdef WARN_SIGNED_OVERFLOW_WORD
- /* Warn if a .word value is too large when treated as a signed
- number. We already know it is not too negative. This is to
- catch over-large switches generated by gcc on the 68k. */
- if (!flag_signed_overflow_ok
- && size == 2
- && add_number > 0x7fff)
- as_bad_where (fixP->fx_file, fixP->fx_line,
- _("signed .word overflow; switch may be too large; %ld at 0x%lx"),
- (long) add_number,
- (unsigned long) (fragP->fr_address + where));
-#endif
- } /* Not a bit fix. */
-
-#ifdef TC_VALIDATE_FIX
- skip: ATTRIBUTE_UNUSED_LABEL
- ;
-#endif
-#ifdef DEBUG5
- fprintf (stderr, "result:\n");
- print_fixup (fixP);
-#endif
- } /* For each fixS in this segment. */
-
- TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count);
- return seg_reloc_count;
-}
-
-#endif /* defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS)) */
-
void
-number_to_chars_bigendian (buf, val, n)
- char *buf;
- valueT val;
- int n;
+number_to_chars_bigendian (char *buf, valueT val, int n)
{
- if ((size_t) n > sizeof (val) || n <= 0)
+ if (n <= 0)
abort ();
while (n--)
{
}
void
-number_to_chars_littleendian (buf, val, n)
- char *buf;
- valueT val;
- int n;
+number_to_chars_littleendian (char *buf, valueT val, int n)
{
- if ((size_t) n > sizeof (val) || n <= 0)
+ if (n <= 0)
abort ();
while (n--)
{
}
void
-write_print_statistics (file)
- FILE *file;
+write_print_statistics (FILE *file)
{
fprintf (file, "fixups: %d\n", n_fixups);
}
extern int indent_level;
void
-print_fixup (fixp)
- fixS *fixp;
+print_fixup (fixS *fixp)
{
indent_level = 1;
- fprintf (stderr, "fix %lx %s:%d", (long) fixp, fixp->fx_file, fixp->fx_line);
+ fprintf (stderr, "fix ");
+ fprintf_vma (stderr, (bfd_vma)((bfd_hostptr_t) fixp));
+ fprintf (stderr, " %s:%d",fixp->fx_file, fixp->fx_line);
if (fixp->fx_pcrel)
fprintf (stderr, " pcrel");
if (fixp->fx_pcrel_adjust)
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 size=%d frag=", fixp->fx_size);
+ fprintf_vma (stderr, (bfd_vma) ((bfd_hostptr_t) fixp->fx_frag));
+ fprintf (stderr, " where=%ld offset=%lx addnumber=%lx",
+ (long) fixp->fx_where,
+ (unsigned long) fixp->fx_offset,
+ (unsigned long) fixp->fx_addnumber);
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 +<");
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