summaryrefslogtreecommitdiffstats
path: root/binutils-2.24/gas/subsegs.c
diff options
context:
space:
mode:
Diffstat (limited to 'binutils-2.24/gas/subsegs.c')
-rw-r--r--binutils-2.24/gas/subsegs.c330
1 files changed, 0 insertions, 330 deletions
diff --git a/binutils-2.24/gas/subsegs.c b/binutils-2.24/gas/subsegs.c
deleted file mode 100644
index 69f837b2..00000000
--- a/binutils-2.24/gas/subsegs.c
+++ /dev/null
@@ -1,330 +0,0 @@
-/* subsegs.c - subsegments -
- Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 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 3, or (at your option)
- any later version.
-
- GAS is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GAS; see the file COPYING. If not, write to the Free
- Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
- 02110-1301, USA. */
-
-/* Segments & sub-segments. */
-
-#include "as.h"
-
-#include "subsegs.h"
-#include "obstack.h"
-
-frchainS *frchain_now;
-
-static struct obstack frchains;
-
-static fragS dummy_frag;
-
-
-void
-subsegs_begin (void)
-{
- obstack_begin (&frchains, chunksize);
-#if __GNUC__ >= 2
- obstack_alignment_mask (&frchains) = __alignof__ (frchainS) - 1;
-#endif
-
- frchain_now = NULL; /* Warn new_subseg() that we are booting. */
- frag_now = &dummy_frag;
-}
-
-/*
- * subseg_change()
- *
- * Change the subsegment we are in, BUT DO NOT MAKE A NEW FRAG for the
- * subsegment. If we are already in the correct subsegment, change nothing.
- * This is used eg as a worker for subseg_set [which does make a new frag_now]
- * and for changing segments after we have read the source. We construct eg
- * fixSs even after the source file is read, so we do have to keep the
- * segment context correct.
- */
-void
-subseg_change (register segT seg, register int subseg)
-{
- segment_info_type *seginfo = seg_info (seg);
- now_seg = seg;
- now_subseg = subseg;
-
- if (! seginfo)
- {
- seginfo = (segment_info_type *) xcalloc (1, sizeof (*seginfo));
- seginfo->bfd_section = seg;
- bfd_set_section_userdata (stdoutput, seg, seginfo);
- }
-}
-
-static void
-subseg_set_rest (segT seg, subsegT subseg)
-{
- frchainS *frcP; /* crawl frchain chain */
- frchainS **lastPP; /* address of last pointer */
- frchainS *newP; /* address of new frchain */
- segment_info_type *seginfo;
-
- mri_common_symbol = NULL;
-
- if (frag_now && frchain_now)
- frchain_now->frch_frag_now = frag_now;
-
- gas_assert (frchain_now == 0
- || frchain_now->frch_last == frag_now);
-
- subseg_change (seg, (int) subseg);
-
- seginfo = seg_info (seg);
-
- /* Attempt to find or make a frchain for that subsection.
- We keep the list sorted by subsection number. */
- for (frcP = *(lastPP = &seginfo->frchainP);
- frcP != NULL;
- frcP = *(lastPP = &frcP->frch_next))
- if (frcP->frch_subseg >= subseg)
- break;
-
- if (frcP == NULL || frcP->frch_subseg != subseg)
- {
- /* This should be the only code that creates a frchainS. */
-
- newP = (frchainS *) obstack_alloc (&frchains, sizeof (frchainS));
- newP->frch_subseg = subseg;
- newP->fix_root = NULL;
- newP->fix_tail = NULL;
- obstack_begin (&newP->frch_obstack, chunksize);
-#if __GNUC__ >= 2
- obstack_alignment_mask (&newP->frch_obstack) = __alignof__ (fragS) - 1;
-#endif
- newP->frch_frag_now = frag_alloc (&newP->frch_obstack);
- newP->frch_frag_now->fr_type = rs_fill;
- newP->frch_cfi_data = NULL;
-
- newP->frch_root = newP->frch_last = newP->frch_frag_now;
-
- *lastPP = newP;
- newP->frch_next = frcP;
- frcP = newP;
- }
-
- frchain_now = frcP;
- frag_now = frcP->frch_frag_now;
-
- gas_assert (frchain_now->frch_last == frag_now);
-}
-
-/*
- * subseg_set(segT, subsegT)
- *
- * If you attempt to change to the current subsegment, nothing happens.
- *
- * In: segT, subsegT code for new subsegment.
- * frag_now -> incomplete frag for current subsegment.
- * If frag_now==NULL, then there is no old, incomplete frag, so
- * the old frag is not closed off.
- *
- * Out: now_subseg, now_seg updated.
- * Frchain_now points to the (possibly new) struct frchain for this
- * sub-segment.
- */
-
-segT
-subseg_get (const char *segname, int force_new)
-{
- segT secptr;
- segment_info_type *seginfo;
- const char *now_seg_name = (now_seg
- ? bfd_get_section_name (stdoutput, now_seg)
- : 0);
-
- if (!force_new
- && now_seg_name
- && (now_seg_name == segname
- || !strcmp (now_seg_name, segname)))
- return now_seg;
-
- if (!force_new)
- secptr = bfd_make_section_old_way (stdoutput, segname);
- else
- secptr = bfd_make_section_anyway (stdoutput, segname);
-
- seginfo = seg_info (secptr);
- if (! seginfo)
- {
- secptr->output_section = secptr;
- seginfo = (segment_info_type *) xcalloc (1, sizeof (*seginfo));
- seginfo->bfd_section = secptr;
- bfd_set_section_userdata (stdoutput, secptr, seginfo);
- }
- return secptr;
-}
-
-segT
-subseg_new (const char *segname, subsegT subseg)
-{
- segT secptr;
-
- secptr = subseg_get (segname, 0);
- subseg_set_rest (secptr, subseg);
- return secptr;
-}
-
-/* Like subseg_new, except a new section is always created, even if
- a section with that name already exists. */
-segT
-subseg_force_new (const char *segname, subsegT subseg)
-{
- segT secptr;
-
- secptr = subseg_get (segname, 1);
- subseg_set_rest (secptr, subseg);
- return secptr;
-}
-
-void
-subseg_set (segT secptr, subsegT subseg)
-{
- if (! (secptr == now_seg && subseg == now_subseg))
- subseg_set_rest (secptr, subseg);
- mri_common_symbol = NULL;
-}
-
-#ifndef obj_sec_sym_ok_for_reloc
-#define obj_sec_sym_ok_for_reloc(SEC) 0
-#endif
-
-symbolS *
-section_symbol (segT sec)
-{
- segment_info_type *seginfo = seg_info (sec);
- symbolS *s;
-
- if (seginfo == 0)
- abort ();
- if (seginfo->sym)
- return seginfo->sym;
-
-#ifndef EMIT_SECTION_SYMBOLS
-#define EMIT_SECTION_SYMBOLS 1
-#endif
-
- if (! EMIT_SECTION_SYMBOLS || symbol_table_frozen)
- {
- /* Here we know it won't be going into the symbol table. */
- s = symbol_create (sec->symbol->name, sec, 0, &zero_address_frag);
- }
- else
- {
- segT seg;
- s = symbol_find (sec->symbol->name);
- /* We have to make sure it is the right symbol when we
- have multiple sections with the same section name. */
- if (s == NULL
- || ((seg = S_GET_SEGMENT (s)) != sec
- && seg != undefined_section))
- s = symbol_new (sec->symbol->name, sec, 0, &zero_address_frag);
- else if (seg == undefined_section)
- {
- S_SET_SEGMENT (s, sec);
- symbol_set_frag (s, &zero_address_frag);
- }
- }
-
- S_CLEAR_EXTERNAL (s);
-
- /* Use the BFD section symbol, if possible. */
- if (obj_sec_sym_ok_for_reloc (sec))
- symbol_set_bfdsym (s, sec->symbol);
- else
- symbol_get_bfdsym (s)->flags |= BSF_SECTION_SYM;
-
- seginfo->sym = s;
- return s;
-}
-
-/* Return whether the specified segment is thought to hold text. */
-
-int
-subseg_text_p (segT sec)
-{
- return (bfd_get_section_flags (stdoutput, sec) & SEC_CODE) != 0;
-}
-
-/* Return non zero if SEC has at least one byte of data. It is
- possible that we'll return zero even on a non-empty section because
- we don't know all the fragment types, and it is possible that an
- fr_fix == 0 one still contributes data. Think of this as
- seg_definitely_not_empty_p. */
-
-int
-seg_not_empty_p (segT sec ATTRIBUTE_UNUSED)
-{
- segment_info_type *seginfo = seg_info (sec);
- frchainS *chain;
- fragS *frag;
-
- if (!seginfo)
- return 0;
-
- for (chain = seginfo->frchainP; chain; chain = chain->frch_next)
- {
- for (frag = chain->frch_root; frag; frag = frag->fr_next)
- if (frag->fr_fix)
- return 1;
- if (obstack_next_free (&chain->frch_obstack)
- != chain->frch_last->fr_literal)
- return 1;
- }
- return 0;
-}
-
-void
-subsegs_print_statistics (FILE *file)
-{
- frchainS *frchp;
- asection *s;
-
- fprintf (file, "frag chains:\n");
- for (s = stdoutput->sections; s; s = s->next)
- {
- segment_info_type *seginfo;
-
- /* Skip gas-internal sections. */
- if (segment_name (s)[0] == '*')
- continue;
-
- seginfo = seg_info (s);
- if (!seginfo)
- continue;
-
- for (frchp = seginfo->frchainP; frchp; frchp = frchp->frch_next)
- {
- int count = 0;
- fragS *fragp;
-
- for (fragp = frchp->frch_root; fragp; fragp = fragp->fr_next)
- count++;
-
- fprintf (file, "\n");
- fprintf (file, "\t%p %-10s\t%10d frags\n", (void *) frchp,
- segment_name (s), count);
- }
- }
-}
-
-/* end of subsegs.c */