binutils-gdb/gas/frags.h

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/* frags.h - Header file for the frag concept.
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Copyright (C) 1987, 92, 93, 94, 95, 97, 98, 99, 2000
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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, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
#ifndef FRAGS_H
#define FRAGS_H
#ifdef ANSI_PROTOTYPES
struct obstack;
#endif
/* A code fragment (frag) is some known number of chars, followed by some
unknown number of chars. Typically the unknown number of chars is an
instruction address whose size is yet unknown. We always know the greatest
possible size the unknown number of chars may become, and reserve that
much room at the end of the frag.
Once created, frags do not change address during assembly.
We chain the frags in (a) forward-linked list(s). The object-file address
of the 1st char of a frag is generally not known until after relax().
Many things at assembly time describe an address by {object-file-address
of a particular frag}+offset.
BUG: it may be smarter to have a single pointer off to various different
notes for different frag kinds. See how code pans. */
struct frag {
/* Object file address (as an octet offset). */
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addressT fr_address;
/* Chain forward; ascending address order. Rooted in frch_root. */
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struct frag *fr_next;
/* (Fixed) number of octets we know we have. May be 0. */
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offsetT fr_fix;
/* May be used for (Variable) number of octets after above.
The generic frag handling code no longer makes any use of fr_var. */
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offsetT fr_var;
/* For variable-length tail. */
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.
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symbolS *fr_symbol;
/* For variable-length tail. */
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offsetT fr_offset;
/* Points to opcode low addr byte, for relaxation. */
char *fr_opcode;
#ifndef NO_LISTING
struct list_info_struct *line;
#endif
/* What state is my tail in? */
relax_stateT fr_type;
relax_substateT fr_subtype;
#ifdef USING_CGEN
/* Don't include this unless using CGEN to keep frag size down. */
struct {
/* CGEN_INSN entry for this instruction. */
const struct cgen_insn *insn;
/* Index into operand table. */
int opindex;
/* Target specific data, usually reloc number. */
int opinfo;
} fr_cgen;
#endif
#ifdef TC_FRAG_TYPE
TC_FRAG_TYPE tc_frag_data;
#endif
/* Where the frag was created, or where it became a variant frag. */
char *fr_file;
unsigned int fr_line;
/* Data begins here. */
char fr_literal[1];
};
#define SIZEOF_STRUCT_FRAG \
((char *) zero_address_frag.fr_literal - (char *) &zero_address_frag)
/* We want to say fr_literal[0] above. */
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/* Current frag we are building. This frag is incomplete. It is,
however, included in frchain_now. The fr_fix field is bogus;
instead, use frag_now_fix (). */
COMMON fragS *frag_now;
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;
/* For local common (N_BSS segment) fixups. */
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COMMON fragS bss_address_frag;
#if 0
/* A macro to speed up appending exactly 1 char to current frag. */
/* JF changed < 1 to <= 1 to avoid a race conditon. */
#define FRAG_APPEND_1_CHAR(datum) \
{ \
if (obstack_room (&frags) <= 1) \
{ \
frag_wane (frag_now); \
frag_new (0); \
} \
obstack_1grow (&frags, datum); \
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}
#else
extern void frag_append_1_char PARAMS ((int));
#define FRAG_APPEND_1_CHAR(X) frag_append_1_char (X)
#endif
void frag_init PARAMS ((void));
fragS *frag_alloc PARAMS ((struct obstack *));
void frag_grow PARAMS ((unsigned int nchars));
char *frag_more PARAMS ((int nchars));
void frag_align PARAMS ((int alignment, int fill_character, int max));
void frag_align_pattern PARAMS ((int alignment,
const char *fill_pattern,
int n_fill,
int max));
* as.h (rs_align_test): New. * frags.c (NOP_OPCODE): Move default from read.c. (MAX_MEM_FOR_RS_ALIGN_CODE): New default. (frag_align_code): New. * frags.h (frag_align_code): Declare. * read.c (NOP_OPCODE): Remove. (do_align): Use frag_align_code. * write.c (NOP_OPCODE): Remove. (get_recorded_alignment): New. (cvt_frag_to_fill): Handle rs_align_test. (relax_segment): Likewise. (subsegs_finish): Align last subseg in section to the section alignment. Use frag_align_code. * write.h (get_recorded_alignment): Declare. * config/obj-coff.c (size_section): Handle rs_align_test. (fill_section, fixup_mdeps): Likewise. (write_object_file): Use frag_align_code. * config/tc-alpha.c (alpha_align): Use frag_align_code. (alpha_handle_align): New. * config/tc-alpha.h (HANDLE_ALIGN): New. (MAX_MEM_FOR_RS_ALIGN_CODE): New. * config/tc-i386.h (md_do_align): Use frag_align_code. (MAX_MEM_FOR_RS_ALIGN_CODE): New. * config/tc-ia64.c (ia64_md_do_align): Don't do code alignment. (ia64_handle_align): New. * config/tc-ia64.h (HANDLE_ALIGN): New. (MAX_MEM_FOR_RS_ALIGN_CODE): New. * config/tc-m32r.c (m32r_do_align): Remove. (m32r_handle_align): New. (fill_insn): Use frag_align_code. * config/tc-m32r.h (md_do_align): Remove. (HANDLE_ALIGN, MAX_MEM_FOR_RS_ALIGN_CODE): New. * config/tc-m88k.c, config/tc-m88k.h: Similarly. * config/tc-mips.c, config/tc-mips.h: Similarly. * config/tc-sh.c (sh_cons_align): Use rs_align_test. (sh_handle_align): Likewise. Handle rs_align_code. (sh_do_align): Remove. * config/tc-sh.h (md_do_align): Remove. (MAX_MEM_FOR_RS_ALIGN_CODE): New. * config/tc-sparc.c (sparc_cons_align): Use rs_align_test. (sparc_handle_align): Likewise. Handle rs_align_code. * config/tc-sparc.h (md_do_align): Remove. (MAX_MEM_FOR_RS_ALIGN_CODE): New.
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void frag_align_code PARAMS ((int alignment, int max));
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void frag_new PARAMS ((int old_frags_var_max_size));
void frag_wane PARAMS ((fragS * fragP));
char *frag_variant PARAMS ((relax_stateT type,
int max_chars,
int var,
relax_substateT subtype,
symbolS * symbol,
offsetT offset,
char *opcode));
char *frag_var PARAMS ((relax_stateT type,
int max_chars,
int var,
relax_substateT subtype,
symbolS * symbol,
offsetT offset,
char *opcode));
#endif /* FRAGS_H */