/* subsegs.h -> subsegs.c
- Copyright (C) 1987 Free Software Foundation, Inc.
-
+ Copyright 1987, 1992, 1993, 1994, 1995, 1996, 1998, 2000
+ 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)
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, 675 Mass Ave, Cambridge, MA 02139, USA. */
+ 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. */
/*
* For every sub-segment the user mentions in the ASsembler program,
* represent code fragments, for that sub-segment, forward chained.
*/
+#include "obstack.h"
+
struct frchain /* control building of a frag chain */
{ /* FRCH = FRagment CHain control */
- struct frag * frch_root; /* 1st struct frag in chain, or NULL */
- struct frag * frch_last; /* last struct frag in chain, or NULL */
- struct frchain * frch_next; /* next in chain of struct frchain-s */
- segT frch_seg; /* SEG_TEXT or SEG_DATA. */
- subsegT frch_subseg; /* subsegment number of this chain */
+ struct frag *frch_root; /* 1st struct frag in chain, or NULL */
+ struct frag *frch_last; /* last struct frag in chain, or NULL */
+ struct frchain *frch_next; /* next in chain of struct frchain-s */
+ segT frch_seg; /* SEG_TEXT or SEG_DATA. */
+ subsegT frch_subseg; /* subsegment number of this chain */
+#ifdef BFD_ASSEMBLER
+ fixS *fix_root; /* Root of fixups for this subsegment. */
+ fixS *fix_tail; /* Last fixup for this subsegment. */
+#endif
+ struct obstack frch_obstack; /* for objects in this frag chain */
+ fragS *frch_frag_now; /* frag_now for this subsegment */
};
typedef struct frchain frchainS;
-extern frchainS * frchain_root; /* NULL means no frchains yet. */
-/* all subsegments' chains hang off here */
+/* All subsegments' chains hang off here. NULL means no frchains yet. */
+extern frchainS *frchain_root;
-extern frchainS * frchain_now;
-/* Frchain we are assembling into now */
-/* That is, the current segment's frag */
-/* chain, even if it contains no (complete) */
-/* frags. */
+/* Frchain we are assembling into now. That is, the current segment's
+ frag chain, even if it contains no (complete) frags. */
+extern frchainS *frchain_now;
+typedef struct segment_info_struct {
+ frchainS *frchainP;
+ unsigned int hadone : 1;
-#ifdef MANY_SEGMENTS
-typedef struct
-{
- frchainS *frchainP;
- int hadone;
- int user_stuff;
- /* struct frag *frag_root;*/
- /* struct frag *last_frag;*/
- fixS *fix_root;
- fixS *fix_tail;
- struct internal_scnhdr scnhdr;
- symbolS *dot;
-
- struct lineno_list *lineno_list_head;
- struct lineno_list *lineno_list_tail;
-
+ /* This field is set if this is a .bss section which does not really
+ have any contents. Once upon a time a .bss section did not have
+ any frags, but that is no longer true. This field prevent the
+ SEC_HAS_CONTENTS flag from being set for the section even if
+ there are frags. */
+ unsigned int bss : 1;
+
+ int user_stuff;
+
+ /* Fixups for this segment. If BFD_ASSEMBLER, this is only valid
+ after the frchains are run together. */
+ fixS *fix_root;
+ fixS *fix_tail;
+
+#if defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER)
+ struct internal_scnhdr scnhdr;
+ enum linkonce_type linkonce;
+ const char *name;
+#endif
+
+ symbolS *dot;
+
+ struct lineno_list *lineno_list_head;
+ struct lineno_list *lineno_list_tail;
+
+#ifdef BFD_ASSEMBLER
+ /* Which BFD section does this gas segment correspond to? */
+ asection *bfd_section;
+
+ /* NULL, or pointer to the gas symbol that is the section symbol for
+ this section. sym->bsym and bfd_section->symbol should be the same. */
+ symbolS *sym;
+#endif
+
+ union {
+ /* Current size of section holding stabs strings. */
+ unsigned long stab_string_size;
+ /* Initial frag for ELF. */
+ char *p;
+ }
+ stabu;
+
+#ifdef NEED_LITERAL_POOL
+ unsigned long literal_pool_size;
+#endif
+
+#ifdef TC_SEGMENT_INFO_TYPE
+ TC_SEGMENT_INFO_TYPE tc_segment_info_data;
+#endif
} segment_info_type;
-segment_info_type segment_info[];
+
+#ifdef BFD_ASSEMBLER
+
+extern segment_info_type *seg_info (segT);
+extern symbolS *section_symbol (segT);
+
+#else /* ! BFD_ASSEMBLER */
+
+#ifdef MANY_SEGMENTS
+
+extern segment_info_type segment_info[];
+
+#define seg_info(SEC) (&segment_info[SEC])
+
#else
-extern frchainS * data0_frchainP;
-/* Sentinel for frchain crawling. */
-/* Points to the 1st data-segment frchain. */
-/* (Which is pointed to by the last text- */
-/* segment frchain.) */
+
+/* Sentinel for frchain crawling. Points to the 1st data-segment
+ frchain. (Which is pointed to by the last text-segment frchain.) */
+extern frchainS *data0_frchainP;
+extern frchainS *bss0_frchainP;
+
+/* Dummy so stuff can compile. Should never be used. */
+struct seg_info_trash {
+ struct {
+ unsigned stab_string_size : 1;
+ } stabu;
+ unsigned hadone : 1;
+};
+#define seg_info(S) (abort (), (struct seg_info_trash *) 0)
#endif
-/* end: subsegs.h */
+#endif /* ! BFD_ASSEMBLER */
+
+extern void subsegs_print_statistics (FILE *);
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