aboutsummaryrefslogtreecommitdiff
path: root/gas/struc-symbol.h
diff options
context:
space:
mode:
authorIan Lance Taylor <ian@airs.com>1999-06-03 00:29:48 +0000
committerIan Lance Taylor <ian@airs.com>1999-06-03 00:29:48 +0000
commit49309057b4c45a2586735182830793c77633f51d (patch)
tree1aaca2ad34e77400fd91047b31afce59afa71426 /gas/struc-symbol.h
parent2b47531bf9ef778773831ecb1b43186e95ffe8d7 (diff)
downloadgdb-49309057b4c45a2586735182830793c77633f51d.zip
gdb-49309057b4c45a2586735182830793c77633f51d.tar.gz
gdb-49309057b4c45a2586735182830793c77633f51d.tar.bz2
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.
Diffstat (limited to 'gas/struc-symbol.h')
-rw-r--r--gas/struc-symbol.h124
1 files changed, 50 insertions, 74 deletions
diff --git a/gas/struc-symbol.h b/gas/struc-symbol.h
index aeb0405..1087c2b 100644
--- a/gas/struc-symbol.h
+++ b/gas/struc-symbol.h
@@ -1,5 +1,5 @@
/* struct_symbol.h - Internal symbol structure
- Copyright (C) 1987, 92, 93, 94, 95, 1998 Free Software Foundation, Inc.
+ Copyright (C) 1987, 92, 93, 94, 95, 98, 1999 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
@@ -21,16 +21,16 @@
#ifndef __struc_symbol_h__
#define __struc_symbol_h__
-#ifdef BFD_ASSEMBLER
-/* The BFD code wants to walk the list in both directions. */
-#undef SYMBOLS_NEED_BACKPOINTERS
-#define SYMBOLS_NEED_BACKPOINTERS
-#endif
+/* The information we keep for a symbol. Note that the symbol table
+ holds pointers both to this and to local_symbol structures. See
+ below. */
-/* our version of an nlist node */
struct symbol
{
-#ifndef BFD_ASSEMBLER
+#ifdef BFD_ASSEMBLER
+ /* BFD symbol */
+ asymbol *bsym;
+#else
/* The (4-origin) position of sy_name in the symbol table of the object
file. This will be 0 for (nameless) .stabd symbols.
@@ -42,9 +42,6 @@ struct symbol
/* The 24 bit symbol number. Symbol numbers start at 0 and are unsigned. */
long sy_number;
-#else
- /* BFD symbol */
- asymbol *bsym;
#endif
/* The value of the symbol. */
@@ -91,75 +88,54 @@ struct symbol
#ifdef TC_SYMFIELD_TYPE
TC_SYMFIELD_TYPE sy_tc;
#endif
-
-#ifdef TARGET_SYMBOL_FIELDS
- TARGET_SYMBOL_FIELDS
-#endif
};
-typedef struct symbol symbolS;
+/* A pointer in the symbol may point to either a complete symbol
+ (struct symbol above) or to a local symbol (struct local_symbol
+ defined here). The symbol code can detect the case by examining
+ the first field. It is always NULL for a local symbol.
-#ifndef WORKING_DOT_WORD
-struct broken_word
- {
- /* Linked list -- one of these structures per ".word x-y+C"
- expression. */
- struct broken_word *next_broken_word;
- /* Segment and subsegment for broken word. */
- segT seg;
- subsegT subseg;
- /* Which frag is this broken word in? */
- fragS *frag;
- /* Where in the frag is it? */
- char *word_goes_here;
- /* Where to add the break. */
- fragS *dispfrag; /* where to add the break */
- /* Operands of expression. */
- symbolS *add;
- symbolS *sub;
- offsetT addnum;
-
- int added; /* nasty thing happend yet? */
- /* 1: added and has a long-jump */
- /* 2: added but uses someone elses long-jump */
-
- /* Pointer to broken_word with a similar long-jump. */
- struct broken_word *use_jump;
- };
-extern struct broken_word *broken_words;
-#endif /* ndef WORKING_DOT_WORD */
-
-/*
- * Current means for getting from symbols to segments and vice verse.
- * This will change for infinite-segments support (e.g. COFF).
- */
-extern const segT N_TYPE_seg[]; /* subseg.c */
-
-#define SEGMENT_TO_SYMBOL_TYPE(seg) ( seg_N_TYPE [(int) (seg)] )
-extern const short seg_N_TYPE[];/* subseg.c */
-
-#define N_REGISTER 30 /* Fake N_TYPE value for SEG_REGISTER */
-
-void symbol_clear_list_pointers PARAMS ((symbolS * symbolP));
-
-#ifdef SYMBOLS_NEED_BACKPOINTERS
-
-void symbol_insert PARAMS ((symbolS * addme, symbolS * target,
- symbolS ** rootP, symbolS ** lastP));
-void symbol_remove PARAMS ((symbolS * symbolP, symbolS ** rootP,
- symbolS ** lastP));
-
-#define symbol_previous(s) ((s)->sy_previous)
+ We do this because we ordinarily only need a small amount of
+ information for a local symbol. The symbol table takes up a lot of
+ space, and storing less information for a local symbol can make a
+ big difference in assembler memory usage when assembling a large
+ file. */
-#endif /* SYMBOLS_NEED_BACKPOINTERS */
-
-void verify_symbol_chain PARAMS ((symbolS * rootP, symbolS * lastP));
-void verify_symbol_chain_2 PARAMS ((symbolS * symP));
+struct local_symbol
+{
+ /* This pointer is always NULL to indicate that this is a local
+ symbol. */
+ asymbol *lsy_marker;
+
+ /* The symbol section. This also serves as a flag. If this is
+ reg_section, then this symbol has been converted into a regular
+ symbol, and sy_sym points to it. */
+ segT lsy_section;
+
+ /* The symbol name. */
+ const char *lsy_name;
+
+ /* The symbol frag or the real symbol, depending upon the value in
+ sy_section. If the symbol has been fully resolved, lsy_frag is
+ set to NULL. */
+ union
+ {
+ fragS *lsy_frag;
+ symbolS *lsy_sym;
+ } u;
-void symbol_append PARAMS ((symbolS * addme, symbolS * target,
- symbolS ** rootP, symbolS ** lastP));
+ /* The offset within the frag. */
+ valueT lsy_offset;
+};
-#define symbol_next(s) ((s)->sy_next)
+#define local_symbol_converted_p(l) ((l)->lsy_section == reg_section)
+#define local_symbol_mark_converted(l) ((l)->lsy_section = reg_section)
+#define local_symbol_resolved_p(l) ((l)->u.lsy_frag == NULL)
+#define local_symbol_mark_resolved(l) ((l)->u.lsy_frag = NULL)
+#define local_symbol_get_frag(l) ((l)->u.lsy_frag)
+#define local_symbol_set_frag(l, f) ((l)->u.lsy_frag = (f))
+#define local_symbol_get_real_symbol(l) ((l)->u.lsy_sym)
+#define local_symbol_set_real_symbol(l, s) ((l)->u.lsy_sym = (s))
#endif /* __struc_symbol_h__ */