1999-05-03 09:29:11 +02:00
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/* frags.h - Header file for the frag concept.
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2000-05-23 07:07:47 +02:00
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Copyright (C) 1987, 92, 93, 94, 95, 97, 98, 99, 2000
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1999-05-03 09:29:11 +02:00
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Free Software Foundation, Inc.
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This file is part of GAS, the GNU Assembler.
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GAS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GAS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GAS; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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#ifndef FRAGS_H
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#define FRAGS_H
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#ifdef ANSI_PROTOTYPES
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struct obstack;
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#endif
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/*
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* A code fragment (frag) is some known number of chars, followed by some
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* unknown number of chars. Typically the unknown number of chars is an
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* instruction address whose size is yet unknown. We always know the greatest
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* possible size the unknown number of chars may become, and reserve that
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* much room at the end of the frag.
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* Once created, frags do not change address during assembly.
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* We chain the frags in (a) forward-linked list(s). The object-file address
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* of the 1st char of a frag is generally not known until after relax().
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* Many things at assembly time describe an address by {object-file-address
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* of a particular frag}+offset.
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BUG: it may be smarter to have a single pointer off to various different
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notes for different frag kinds. See how code pans
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*/
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struct frag
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{
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2000-02-03 19:20:23 +01:00
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/* Object file address (as an octet offset). */
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1999-05-03 09:29:11 +02:00
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addressT fr_address;
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/* Chain forward; ascending address order. Rooted in frch_root. */
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struct frag *fr_next;
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2000-02-03 19:20:23 +01:00
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/* (Fixed) number of octets we know we have. May be 0. */
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1999-05-03 09:29:11 +02:00
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offsetT fr_fix;
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2000-05-23 06:48:21 +02:00
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/* May be used for (Variable) number of octets after above.
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The generic frag handling code no longer makes any use of fr_var. */
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1999-05-03 09:29:11 +02:00
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offsetT fr_var;
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/* For variable-length tail. */
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Add support for storing local symbols in a small structure to save
memory when assembling large files.
* as.h: Don't include struc-symbol.h.
(symbolS): Add typedef.
* symbols.c: Include struc-symbol.h.
(local_hash): New static variable.
(save_symbol_name): New static function, from symbol_create.
(symbol_create): Call save_symbol_name.
(local_symbol_count): New static variable.
(local_symbol_conversion_count): Likewise.
(LOCAL_SYMBOL_CHECK): Define.
(local_symbol_make): New static function.
(local_symbol_convert): New static function.
(colon): Handle local symbols. Create local symbol for local
label name.
(symbol_table_insert): Handle local symbols.
(symbol_find_or_make): Create local symbol for local label name.
(symbol_find_base): Check for local symbol.
(symbol_append, symbol_insert): Check for local symbols.
(symbol_clear_list_pointers, symbol_remove): Likewise.
(verify_symbol_chain): Likewise.
(copy_symbol_attributes): Likewise.
(resolve_symbol_value): Handle local symbols.
(resolve_local_symbol): New static function.
(resolve_local_symbol_values): New function.
(S_GET_VALUE, S_SET_VALUE): Handle local symbols.
(S_IS_FUNCTION, S_IS_EXTERNAL, S_IS_WEAK, S_IS_COMMON): Likewise.
(S_IS_DEFINED, S_IS_DEBUG, S_IS_LOCAL, S_GET_NAME): Likewise.
(S_GET_SEGMENT, S_SET_SEGMENT, S_SET_EXTERNAL): Likewise.
(S_CLEAR_EXTERNAL, S_SET_WEAK, S_SET_NAME): Likewise.
(symbol_previous, symbol_next): New functions.
(symbol_get_value_expression): Likewise.
(symbol_set_value_expression): Likewise.
(symbol_set_frag, symbol_get_frag): Likewise.
(symbol_mark_used, symbol_clear_used, symbol_used_p): Likewise.
(symbol_mark_used_in_reloc): Likewise.
(symbol_clear_used_in_reloc, symbol_used_in_reloc_p): Likewise.
(symbol_mark_mri_common, symbol_clear_mri_common): Likewise.
(symbol_mri_common_p): Likewise.
(symbol_mark_written, symbol_clear_written): Likewise.
(symbol_written_p): Likewise.
(symbol_mark_resolved, symbol_resolved_p): Likewise.
(symbol_section_p, symbol_equated_p): Likewise.
(symbol_constant_p): Likewise.
(symbol_get_bfdsym, symbol_set_bfdsym): Likewise.
(symbol_get_obj, symbol_set_obj): Likewise.
(symbol_get_tc, symbol_set_tc): Likewise.
(symbol_begin): Initialize local_hash.
(print_symbol_value_1): Handle local symbols.
(symbol_print_statistics): Print local symbol statistics.
* symbols.h: Include "struc-symbol.h" if not BFD_ASSEMBLER.
Declare new symbols.c functions. Move many declarations here from
struc-symbol.h.
(SYMBOLS_NEED_BACKPOINTERS): Define if needed.
* struc-symbol.h (SYMBOLS_NEED_BACKPOINTERS): Don't set.
(struct symbol): Move bsym to make it clearly the first field.
Remove TARGET_SYMBOL_FIELDS.
(symbolS): Don't typedef.
(struct broken_word): Remove.
(N_TYPE_seg, seg_N_TYPE): Move to symbol.h.
(SEGMENT_TO_SYMBOL_TYPE, N_REGISTER): Likewise.
(symbol_clear_list_pointers): Likewise.
(symbol_insert, symbol_remove): Likewise.
(symbol_previous, symbol_append): Likewise.
(verify_symbol_chain, verify_symbol_chain_2): Likewise.
(struct local_symbol): Define.
(local_symbol_converted_p, local_symbol_mark_converted): Define.
(local_symbol_resolved_p, local_symbol_mark_resolved): Define.
(local_symbol_get_frag, local_symbol_set_frag): Define.
(local_symbol_get_real_symbol): Define.
(local_symbol_set_real_symbol): Define.
Define.
* write.c (write_object_file): Call resolve_local_symbol_values.
* config/obj-ecoff.h (OBJ_SYMFIELD_TYPE): Define.
(TARGET_SYMBOL_FIELDS): Don't define.
* config/obj-elf.h (OBJ_SYMFIELD_TYPE): Add local field. If
ECOFF_DEBUGGING, add ECOFF fields.
(ELF_TARGET_SYMBOL_FIELDS, TARGET_SYMBOL_FIELDS): Don't define.
* config/obj-multi.h (struct elf_obj_sy): Add local field. If
ECOFF_DEBUGGING, add ECOFF fields.
(ELF_TARGET_SYMBOL_FIELDS, TARGET_SYMBOL_FIELDS): Don't define.
(ECOFF_DEBUG_TARGET_SYMBOL_FIELDS): Don't define.
* config/tc-mcore.h: Don't include struc-symbol.h.
(TARGET_SYMBOL_FIELDS): Don't define.
(struct mcore_tc_sy): Define.
(TC_SYMFIELD_TYPE): Define.
* Many files: Use symbolS instead of struct symbol. Use new
accessor functions rather than referring to symbolS fields
directly.
* read.c (s_mri_common): Don't add in value of line_label.
* config/tc-mips.c (md_apply_fix): Correct parenthesization when
checking for SEC_LINK_ONCE.
* config/tc-sh.h (sh_fix_adjustable): Declare.
1999-06-03 02:29:48 +02:00
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symbolS *fr_symbol;
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1999-05-03 09:29:11 +02:00
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/* For variable-length tail. */
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offsetT fr_offset;
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/* Points to opcode low addr byte, for relaxation. */
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char *fr_opcode;
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#ifndef NO_LISTING
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struct list_info_struct *line;
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#endif
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/* What state is my tail in? */
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relax_stateT fr_type;
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relax_substateT fr_subtype;
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#ifdef USING_CGEN
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/* Don't include this unless using CGEN to keep frag size down. */
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struct {
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/* CGEN_INSN entry for this instruction. */
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const struct cgen_insn *insn;
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/* Index into operand table. */
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int opindex;
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/* Target specific data, usually reloc number. */
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int opinfo;
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} fr_cgen;
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#endif
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#ifdef TC_FRAG_TYPE
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TC_FRAG_TYPE tc_frag_data;
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#endif
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/* Where the frag was created, or where it became a variant frag. */
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char *fr_file;
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unsigned int fr_line;
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/* Data begins here. */
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char fr_literal[1];
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};
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#define SIZEOF_STRUCT_FRAG \
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((char *)zero_address_frag.fr_literal-(char *)&zero_address_frag)
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/* We want to say fr_literal[0] above. */
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/* Current frag we are building. This frag is incomplete. It is,
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however, included in frchain_now. The fr_fix field is bogus;
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instead, use frag_now_fix (). */
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COMMON fragS *frag_now;
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extern addressT frag_now_fix PARAMS ((void));
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extern addressT frag_now_fix_octets PARAMS ((void));
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/* For foreign-segment symbol fixups. */
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COMMON fragS zero_address_frag;
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/* For local common (N_BSS segment) fixups. */
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COMMON fragS bss_address_frag;
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#if 0
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/*
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* A macro to speed up appending exactly 1 char
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* to current frag.
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*/
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/* JF changed < 1 to <= 1 to avoid a race conditon */
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#define FRAG_APPEND_1_CHAR(datum) \
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{ \
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if (obstack_room( &frags ) <= 1) {\
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frag_wane (frag_now); \
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frag_new (0); \
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} \
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obstack_1grow( &frags, datum ); \
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}
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#else
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extern void frag_append_1_char PARAMS ((int));
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#define FRAG_APPEND_1_CHAR(X) frag_append_1_char (X)
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#endif
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void frag_init PARAMS ((void));
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fragS *frag_alloc PARAMS ((struct obstack *));
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void frag_grow PARAMS ((unsigned int nchars));
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char *frag_more PARAMS ((int nchars));
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void frag_align PARAMS ((int alignment, int fill_character, int max));
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void frag_align_pattern PARAMS ((int alignment,
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const char *fill_pattern,
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int n_fill,
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int max));
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void frag_new PARAMS ((int old_frags_var_max_size));
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void frag_wane PARAMS ((fragS * fragP));
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char *frag_variant PARAMS ((relax_stateT type,
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int max_chars,
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int var,
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relax_substateT subtype,
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symbolS * symbol,
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offsetT offset,
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char *opcode));
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char *frag_var PARAMS ((relax_stateT type,
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int max_chars,
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int var,
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relax_substateT subtype,
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symbolS * symbol,
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offsetT offset,
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char *opcode));
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#endif /* FRAGS_H */
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