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Diffstat (limited to 'contrib/binutils/gas/symbols.c')
| -rw-r--r-- | contrib/binutils/gas/symbols.c | 2576 |
1 files changed, 2576 insertions, 0 deletions
diff --git a/contrib/binutils/gas/symbols.c b/contrib/binutils/gas/symbols.c new file mode 100644 index 0000000..761a020 --- /dev/null +++ b/contrib/binutils/gas/symbols.c @@ -0,0 +1,2576 @@ +/* symbols.c -symbol table- + Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, + 1999, 2000, 2001, 2002, 2003 + 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. */ + +/* #define DEBUG_SYMS / * to debug symbol list maintenance. */ + +#include "as.h" + +#include "safe-ctype.h" +#include "obstack.h" /* For "symbols.h" */ +#include "subsegs.h" + +#include "struc-symbol.h" + +/* This is non-zero if symbols are case sensitive, which is the + default. */ +int symbols_case_sensitive = 1; + +#ifndef WORKING_DOT_WORD +extern int new_broken_words; +#endif + +/* symbol-name => struct symbol pointer */ +static struct hash_control *sy_hash; + +/* Table of local symbols. */ +static struct hash_control *local_hash; + +/* Below are commented in "symbols.h". */ +symbolS *symbol_rootP; +symbolS *symbol_lastP; +symbolS abs_symbol; + +#ifdef DEBUG_SYMS +#define debug_verify_symchain verify_symbol_chain +#else +#define debug_verify_symchain(root, last) ((void) 0) +#endif + +#define DOLLAR_LABEL_CHAR '\001' +#define LOCAL_LABEL_CHAR '\002' + +struct obstack notes; + +static char *save_symbol_name (const char *); +static void fb_label_init (void); +static long dollar_label_instance (long); +static long fb_label_instance (long); + +static void print_binary (FILE *, const char *, expressionS *); +static void report_op_error (symbolS *, symbolS *, symbolS *); + +/* Return a pointer to a new symbol. Die if we can't make a new + symbol. Fill in the symbol's values. Add symbol to end of symbol + chain. + + This function should be called in the general case of creating a + symbol. However, if the output file symbol table has already been + set, and you are certain that this symbol won't be wanted in the + output file, you can call symbol_create. */ + +symbolS * +symbol_new (const char *name, segT segment, valueT valu, fragS *frag) +{ + symbolS *symbolP = symbol_create (name, segment, valu, frag); + + /* Link to end of symbol chain. */ +#ifdef BFD_ASSEMBLER + { + extern int symbol_table_frozen; + if (symbol_table_frozen) + abort (); + } +#endif + symbol_append (symbolP, symbol_lastP, &symbol_rootP, &symbol_lastP); + + return symbolP; +} + +/* Save a symbol name on a permanent obstack, and convert it according + to the object file format. */ + +static char * +save_symbol_name (const char *name) +{ + unsigned int name_length; + char *ret; + + name_length = strlen (name) + 1; /* +1 for \0. */ + obstack_grow (¬es, name, name_length); + ret = obstack_finish (¬es); + +#ifdef STRIP_UNDERSCORE + if (ret[0] == '_') + ++ret; +#endif + +#ifdef tc_canonicalize_symbol_name + ret = tc_canonicalize_symbol_name (ret); +#endif + + if (! symbols_case_sensitive) + { + char *s; + + for (s = ret; *s != '\0'; s++) + *s = TOUPPER (*s); + } + + return ret; +} + +symbolS * +symbol_create (const char *name, /* It is copied, the caller can destroy/modify. */ + segT segment, /* Segment identifier (SEG_<something>). */ + valueT valu, /* Symbol value. */ + fragS *frag /* Associated fragment. */) +{ + char *preserved_copy_of_name; + symbolS *symbolP; + + preserved_copy_of_name = save_symbol_name (name); + + symbolP = (symbolS *) obstack_alloc (¬es, sizeof (symbolS)); + + /* symbol must be born in some fixed state. This seems as good as any. */ + memset (symbolP, 0, sizeof (symbolS)); + +#ifdef BFD_ASSEMBLER + symbolP->bsym = bfd_make_empty_symbol (stdoutput); + if (symbolP->bsym == NULL) + as_perror ("%s", "bfd_make_empty_symbol"); + symbolP->bsym->udata.p = (PTR) symbolP; +#endif + S_SET_NAME (symbolP, preserved_copy_of_name); + + S_SET_SEGMENT (symbolP, segment); + S_SET_VALUE (symbolP, valu); + symbol_clear_list_pointers (symbolP); + + symbolP->sy_frag = frag; +#ifndef BFD_ASSEMBLER + symbolP->sy_number = ~0; + symbolP->sy_name_offset = (unsigned int) ~0; +#endif + + obj_symbol_new_hook (symbolP); + +#ifdef tc_symbol_new_hook + tc_symbol_new_hook (symbolP); +#endif + + return symbolP; +} + +#ifdef BFD_ASSEMBLER + +/* Local symbol support. If we can get away with it, we keep only a + small amount of information for local symbols. */ + +static symbolS *local_symbol_convert (struct local_symbol *); + +/* Used for statistics. */ + +static unsigned long local_symbol_count; +static unsigned long local_symbol_conversion_count; + +/* This macro is called with a symbol argument passed by reference. + It returns whether this is a local symbol. If necessary, it + changes its argument to the real symbol. */ + +#define LOCAL_SYMBOL_CHECK(s) \ + (s->bsym == NULL \ + ? (local_symbol_converted_p ((struct local_symbol *) s) \ + ? (s = local_symbol_get_real_symbol ((struct local_symbol *) s), \ + 0) \ + : 1) \ + : 0) + +/* Create a local symbol and insert it into the local hash table. */ + +struct local_symbol * +local_symbol_make (const char *name, segT section, valueT value, fragS *frag) +{ + char *name_copy; + struct local_symbol *ret; + + ++local_symbol_count; + + name_copy = save_symbol_name (name); + + ret = (struct local_symbol *) obstack_alloc (¬es, sizeof *ret); + ret->lsy_marker = NULL; + ret->lsy_name = name_copy; + ret->lsy_section = section; + local_symbol_set_frag (ret, frag); + ret->lsy_value = value; + + hash_jam (local_hash, name_copy, (PTR) ret); + + return ret; +} + +/* Convert a local symbol into a real symbol. Note that we do not + reclaim the space used by the local symbol. */ + +static symbolS * +local_symbol_convert (struct local_symbol *locsym) +{ + symbolS *ret; + + assert (locsym->lsy_marker == NULL); + if (local_symbol_converted_p (locsym)) + return local_symbol_get_real_symbol (locsym); + + ++local_symbol_conversion_count; + + ret = symbol_new (locsym->lsy_name, locsym->lsy_section, locsym->lsy_value, + local_symbol_get_frag (locsym)); + + if (local_symbol_resolved_p (locsym)) + ret->sy_resolved = 1; + + /* Local symbols are always either defined or used. */ + ret->sy_used = 1; + +#ifdef TC_LOCAL_SYMFIELD_CONVERT + TC_LOCAL_SYMFIELD_CONVERT (locsym, ret); +#endif + + symbol_table_insert (ret); + + local_symbol_mark_converted (locsym); + local_symbol_set_real_symbol (locsym, ret); + + hash_jam (local_hash, locsym->lsy_name, NULL); + + return ret; +} + +#else /* ! BFD_ASSEMBLER */ + +#define LOCAL_SYMBOL_CHECK(s) 0 +#define local_symbol_convert(s) ((symbolS *) s) + +#endif /* ! BFD_ASSEMBLER */ + +/* We have just seen "<name>:". + Creates a struct symbol unless it already exists. + + Gripes if we are redefining a symbol incompatibly (and ignores it). */ + +symbolS * +colon (/* Just seen "x:" - rattle symbols & frags. */ + const char *sym_name /* Symbol name, as a cannonical string. */ + /* We copy this string: OK to alter later. */) +{ + register symbolS *symbolP; /* Symbol we are working with. */ + + /* Sun local labels go out of scope whenever a non-local symbol is + defined. */ + if (LOCAL_LABELS_DOLLAR) + { + int local; + +#ifdef BFD_ASSEMBLER + local = bfd_is_local_label_name (stdoutput, sym_name); +#else + local = LOCAL_LABEL (sym_name); +#endif + + if (! local) + dollar_label_clear (); + } + +#ifndef WORKING_DOT_WORD + if (new_broken_words) + { + struct broken_word *a; + int possible_bytes; + fragS *frag_tmp; + char *frag_opcode; + + extern const int md_short_jump_size; + extern const int md_long_jump_size; + + if (now_seg == absolute_section) + { + as_bad (_("cannot define symbol `%s' in absolute section"), sym_name); + return NULL; + } + + possible_bytes = (md_short_jump_size + + new_broken_words * md_long_jump_size); + + frag_tmp = frag_now; + frag_opcode = frag_var (rs_broken_word, + possible_bytes, + possible_bytes, + (relax_substateT) 0, + (symbolS *) broken_words, + (offsetT) 0, + NULL); + + /* We want to store the pointer to where to insert the jump + table in the fr_opcode of the rs_broken_word frag. This + requires a little hackery. */ + while (frag_tmp + && (frag_tmp->fr_type != rs_broken_word + || frag_tmp->fr_opcode)) + frag_tmp = frag_tmp->fr_next; + know (frag_tmp); + frag_tmp->fr_opcode = frag_opcode; + new_broken_words = 0; + + for (a = broken_words; a && a->dispfrag == 0; a = a->next_broken_word) + a->dispfrag = frag_tmp; + } +#endif /* WORKING_DOT_WORD */ + + if ((symbolP = symbol_find (sym_name)) != 0) + { +#ifdef RESOLVE_SYMBOL_REDEFINITION + if (RESOLVE_SYMBOL_REDEFINITION (symbolP)) + return symbolP; +#endif + /* Now check for undefined symbols. */ + if (LOCAL_SYMBOL_CHECK (symbolP)) + { +#ifdef BFD_ASSEMBLER + struct local_symbol *locsym = (struct local_symbol *) symbolP; + + if (locsym->lsy_section != undefined_section + && (local_symbol_get_frag (locsym) != frag_now + || locsym->lsy_section != now_seg + || locsym->lsy_value != frag_now_fix ())) + { + as_bad (_("symbol `%s' is already defined"), sym_name); + return symbolP; + } + + locsym->lsy_section = now_seg; + local_symbol_set_frag (locsym, frag_now); + locsym->lsy_value = frag_now_fix (); +#endif + } + else if (!S_IS_DEFINED (symbolP) || S_IS_COMMON (symbolP)) + { + if (S_GET_VALUE (symbolP) == 0) + { + symbolP->sy_frag = frag_now; +#ifdef OBJ_VMS + S_SET_OTHER (symbolP, const_flag); +#endif + S_SET_VALUE (symbolP, (valueT) frag_now_fix ()); + S_SET_SEGMENT (symbolP, now_seg); +#ifdef N_UNDF + know (N_UNDF == 0); +#endif /* if we have one, it better be zero. */ + + } + else + { + /* There are still several cases to check: + + A .comm/.lcomm symbol being redefined as initialized + data is OK + + A .comm/.lcomm symbol being redefined with a larger + size is also OK + + This only used to be allowed on VMS gas, but Sun cc + on the sparc also depends on it. */ + + if (((!S_IS_DEBUG (symbolP) + && (!S_IS_DEFINED (symbolP) || S_IS_COMMON (symbolP)) + && S_IS_EXTERNAL (symbolP)) + || S_GET_SEGMENT (symbolP) == bss_section) + && (now_seg == data_section + || now_seg == S_GET_SEGMENT (symbolP))) + { + /* Select which of the 2 cases this is. */ + if (now_seg != data_section) + { + /* New .comm for prev .comm symbol. + + If the new size is larger we just change its + value. If the new size is smaller, we ignore + this symbol. */ + if (S_GET_VALUE (symbolP) + < ((unsigned) frag_now_fix ())) + { + S_SET_VALUE (symbolP, (valueT) frag_now_fix ()); + } + } + else + { + /* It is a .comm/.lcomm being converted to initialized + data. */ + symbolP->sy_frag = frag_now; +#ifdef OBJ_VMS + S_SET_OTHER (symbolP, const_flag); +#endif + S_SET_VALUE (symbolP, (valueT) frag_now_fix ()); + S_SET_SEGMENT (symbolP, now_seg); /* Keep N_EXT bit. */ + } + } + else + { +#if (!defined (OBJ_AOUT) && !defined (OBJ_MAYBE_AOUT) \ + && !defined (OBJ_BOUT) && !defined (OBJ_MAYBE_BOUT)) + static const char *od_buf = ""; +#else + char od_buf[100]; + od_buf[0] = '\0'; +#ifdef BFD_ASSEMBLER + if (OUTPUT_FLAVOR == bfd_target_aout_flavour) +#endif + sprintf (od_buf, "%d.%d.", + S_GET_OTHER (symbolP), + S_GET_DESC (symbolP)); +#endif + as_bad (_("symbol `%s' is already defined as \"%s\"/%s%ld"), + sym_name, + segment_name (S_GET_SEGMENT (symbolP)), + od_buf, + (long) S_GET_VALUE (symbolP)); + } + } /* if the undefined symbol has no value */ + } + else + { + /* Don't blow up if the definition is the same. */ + if (!(frag_now == symbolP->sy_frag + && S_GET_VALUE (symbolP) == frag_now_fix () + && S_GET_SEGMENT (symbolP) == now_seg)) + as_bad (_("symbol `%s' is already defined"), sym_name); + } + + } +#ifdef BFD_ASSEMBLER + else if (! flag_keep_locals && bfd_is_local_label_name (stdoutput, sym_name)) + { + symbolP = (symbolS *) local_symbol_make (sym_name, now_seg, + (valueT) frag_now_fix (), + frag_now); + } +#endif /* BFD_ASSEMBLER */ + else + { + symbolP = symbol_new (sym_name, now_seg, (valueT) frag_now_fix (), + frag_now); +#ifdef OBJ_VMS + S_SET_OTHER (symbolP, const_flag); +#endif /* OBJ_VMS */ + + symbol_table_insert (symbolP); + } + + if (mri_common_symbol != NULL) + { + /* This symbol is actually being defined within an MRI common + section. This requires special handling. */ + if (LOCAL_SYMBOL_CHECK (symbolP)) + symbolP = local_symbol_convert ((struct local_symbol *) symbolP); + symbolP->sy_value.X_op = O_symbol; + symbolP->sy_value.X_add_symbol = mri_common_symbol; + symbolP->sy_value.X_add_number = S_GET_VALUE (mri_common_symbol); + symbolP->sy_frag = &zero_address_frag; + S_SET_SEGMENT (symbolP, expr_section); + symbolP->sy_mri_common = 1; + } + +#ifdef tc_frob_label + tc_frob_label (symbolP); +#endif +#ifdef obj_frob_label + obj_frob_label (symbolP); +#endif + + return symbolP; +} + +/* Die if we can't insert the symbol. */ + +void +symbol_table_insert (symbolS *symbolP) +{ + register const char *error_string; + + know (symbolP); + know (S_GET_NAME (symbolP)); + + if (LOCAL_SYMBOL_CHECK (symbolP)) + { + error_string = hash_jam (local_hash, S_GET_NAME (symbolP), + (PTR) symbolP); + if (error_string != NULL) + as_fatal (_("inserting \"%s\" into symbol table failed: %s"), + S_GET_NAME (symbolP), error_string); + return; + } + + if ((error_string = hash_jam (sy_hash, S_GET_NAME (symbolP), (PTR) symbolP))) + { + as_fatal (_("inserting \"%s\" into symbol table failed: %s"), + S_GET_NAME (symbolP), error_string); + } /* on error */ +} + +/* If a symbol name does not exist, create it as undefined, and insert + it into the symbol table. Return a pointer to it. */ + +symbolS * +symbol_find_or_make (const char *name) +{ + register symbolS *symbolP; + + symbolP = symbol_find (name); + + if (symbolP == NULL) + { +#ifdef BFD_ASSEMBLER + if (! flag_keep_locals && bfd_is_local_label_name (stdoutput, name)) + { + symbolP = md_undefined_symbol ((char *) name); + if (symbolP != NULL) + return symbolP; + + symbolP = (symbolS *) local_symbol_make (name, undefined_section, + (valueT) 0, + &zero_address_frag); + return symbolP; + } +#endif + + symbolP = symbol_make (name); + + symbol_table_insert (symbolP); + } /* if symbol wasn't found */ + + return (symbolP); +} + +symbolS * +symbol_make (const char *name) +{ + symbolS *symbolP; + + /* Let the machine description default it, e.g. for register names. */ + symbolP = md_undefined_symbol ((char *) name); + + if (!symbolP) + symbolP = symbol_new (name, undefined_section, (valueT) 0, &zero_address_frag); + + return (symbolP); +} + +symbolS * +symbol_temp_new (segT seg, valueT ofs, fragS *frag) +{ + return symbol_new (FAKE_LABEL_NAME, seg, ofs, frag); +} + +symbolS * +symbol_temp_new_now (void) +{ + return symbol_temp_new (now_seg, frag_now_fix (), frag_now); +} + +symbolS * +symbol_temp_make (void) +{ + return symbol_make (FAKE_LABEL_NAME); +} + +/* Implement symbol table lookup. + In: A symbol's name as a string: '\0' can't be part of a symbol name. + Out: NULL if the name was not in the symbol table, else the address + of a struct symbol associated with that name. */ + +symbolS * +symbol_find (const char *name) +{ +#ifdef STRIP_UNDERSCORE + return (symbol_find_base (name, 1)); +#else /* STRIP_UNDERSCORE */ + return (symbol_find_base (name, 0)); +#endif /* STRIP_UNDERSCORE */ +} + +symbolS * +symbol_find_exact (const char *name) +{ +#ifdef BFD_ASSEMBLER + { + struct local_symbol *locsym; + + locsym = (struct local_symbol *) hash_find (local_hash, name); + if (locsym != NULL) + return (symbolS *) locsym; + } +#endif + + return ((symbolS *) hash_find (sy_hash, name)); +} + +symbolS * +symbol_find_base (const char *name, int strip_underscore) +{ + if (strip_underscore && *name == '_') + name++; + +#ifdef tc_canonicalize_symbol_name + { + char *copy; + size_t len = strlen (name) + 1; + + copy = (char *) alloca (len); + memcpy (copy, name, len); + name = tc_canonicalize_symbol_name (copy); + } +#endif + + if (! symbols_case_sensitive) + { + char *copy; + const char *orig; + unsigned char c; + + orig = name; + name = copy = (char *) alloca (strlen (name) + 1); + + while ((c = *orig++) != '\0') + { + *copy++ = TOUPPER (c); + } + *copy = '\0'; + } + + return symbol_find_exact (name); +} + +/* Once upon a time, symbols were kept in a singly linked list. At + least coff needs to be able to rearrange them from time to time, for + which a doubly linked list is much more convenient. Loic did these + as macros which seemed dangerous to me so they're now functions. + xoxorich. */ + +/* Link symbol ADDME after symbol TARGET in the chain. */ + +void +symbol_append (symbolS *addme, symbolS *target, + symbolS **rootPP, symbolS **lastPP) +{ + if (LOCAL_SYMBOL_CHECK (addme)) + abort (); + if (target != NULL && LOCAL_SYMBOL_CHECK (target)) + abort (); + + if (target == NULL) + { + know (*rootPP == NULL); + know (*lastPP == NULL); + addme->sy_next = NULL; +#ifdef SYMBOLS_NEED_BACKPOINTERS + addme->sy_previous = NULL; +#endif + *rootPP = addme; + *lastPP = addme; + return; + } /* if the list is empty */ + + if (target->sy_next != NULL) + { +#ifdef SYMBOLS_NEED_BACKPOINTERS + target->sy_next->sy_previous = addme; +#endif /* SYMBOLS_NEED_BACKPOINTERS */ + } + else + { + know (*lastPP == target); + *lastPP = addme; + } /* if we have a next */ + + addme->sy_next = target->sy_next; + target->sy_next = addme; + +#ifdef SYMBOLS_NEED_BACKPOINTERS + addme->sy_previous = target; +#endif /* SYMBOLS_NEED_BACKPOINTERS */ + + debug_verify_symchain (symbol_rootP, symbol_lastP); +} + +/* Set the chain pointers of SYMBOL to null. */ + +void +symbol_clear_list_pointers (symbolS *symbolP) +{ + if (LOCAL_SYMBOL_CHECK (symbolP)) + abort (); + symbolP->sy_next = NULL; +#ifdef SYMBOLS_NEED_BACKPOINTERS + symbolP->sy_previous = NULL; +#endif +} + +#ifdef SYMBOLS_NEED_BACKPOINTERS +/* Remove SYMBOLP from the list. */ + +void +symbol_remove (symbolS *symbolP, symbolS **rootPP, symbolS **lastPP) +{ + if (LOCAL_SYMBOL_CHECK (symbolP)) + abort (); + + if (symbolP == *rootPP) + { + *rootPP = symbolP->sy_next; + } /* if it was the root */ + + if (symbolP == *lastPP) + { + *lastPP = symbolP->sy_previous; + } /* if it was the tail */ + + if (symbolP->sy_next != NULL) + { + symbolP->sy_next->sy_previous = symbolP->sy_previous; + } /* if not last */ + + if (symbolP->sy_previous != NULL) + { + symbolP->sy_previous->sy_next = symbolP->sy_next; + } /* if not first */ + + debug_verify_symchain (*rootPP, *lastPP); +} + +/* Link symbol ADDME before symbol TARGET in the chain. */ + +void +symbol_insert (symbolS *addme, symbolS *target, + symbolS **rootPP, symbolS **lastPP ATTRIBUTE_UNUSED) +{ + if (LOCAL_SYMBOL_CHECK (addme)) + abort (); + if (LOCAL_SYMBOL_CHECK (target)) + abort (); + + if (target->sy_previous != NULL) + { + target->sy_previous->sy_next = addme; + } + else + { + know (*rootPP == target); + *rootPP = addme; + } /* if not first */ + + addme->sy_previous = target->sy_previous; + target->sy_previous = addme; + addme->sy_next = target; + + debug_verify_symchain (*rootPP, *lastPP); +} + +#endif /* SYMBOLS_NEED_BACKPOINTERS */ + +void +verify_symbol_chain (symbolS *rootP, symbolS *lastP) +{ + symbolS *symbolP = rootP; + + if (symbolP == NULL) + return; + + for (; symbol_next (symbolP) != NULL; symbolP = symbol_next (symbolP)) + { +#ifdef BFD_ASSEMBLER + assert (symbolP->bsym != NULL); +#endif +#ifdef SYMBOLS_NEED_BACKPOINTERS + assert (symbolP->sy_next->sy_previous == symbolP); +#else + /* Walk the list anyways, to make sure pointers are still good. */ + ; +#endif /* SYMBOLS_NEED_BACKPOINTERS */ + } + + assert (lastP == symbolP); +} + +void +verify_symbol_chain_2 (symbolS *sym) +{ + symbolS *p = sym, *n = sym; +#ifdef SYMBOLS_NEED_BACKPOINTERS + while (symbol_previous (p)) + p = symbol_previous (p); +#endif + while (symbol_next (n)) + n = symbol_next (n); + verify_symbol_chain (p, n); +} + +static void +report_op_error (symbolS *symp, symbolS *left, symbolS *right) +{ + char *file; + unsigned int line; + segT seg_left = S_GET_SEGMENT (left); + segT seg_right = right ? S_GET_SEGMENT (right) : 0; + + if (expr_symbol_where (symp, &file, &line)) + { + if (seg_left == undefined_section) + as_bad_where (file, line, + _("undefined symbol `%s' in operation"), + S_GET_NAME (left)); + if (seg_right == undefined_section) + as_bad_where (file, line, + _("undefined symbol `%s' in operation"), + S_GET_NAME (right)); + if (seg_left != undefined_section + && seg_right != undefined_section) + { + if (right) + as_bad_where (file, line, + _("invalid sections for operation on `%s' and `%s'"), + S_GET_NAME (left), S_GET_NAME (right)); + else + as_bad_where (file, line, + _("invalid section for operation on `%s'"), + S_GET_NAME (left)); + } + + } + else + { + if (seg_left == undefined_section) + as_bad (_("undefined symbol `%s' in operation setting `%s'"), + S_GET_NAME (left), S_GET_NAME (symp)); + if (seg_right == undefined_section) + as_bad (_("undefined symbol `%s' in operation setting `%s'"), + S_GET_NAME (right), S_GET_NAME (symp)); + if (seg_left != undefined_section + && seg_right != undefined_section) + { + if (right) + as_bad_where (file, line, + _("invalid sections for operation on `%s' and `%s' setting `%s'"), + S_GET_NAME (left), S_GET_NAME (right), S_GET_NAME (symp)); + else + as_bad_where (file, line, + _("invalid section for operation on `%s' setting `%s'"), + S_GET_NAME (left), S_GET_NAME (symp)); + } + } +} + +/* Resolve the value of a symbol. This is called during the final + pass over the symbol table to resolve any symbols with complex + values. */ + +valueT +resolve_symbol_value (symbolS *symp) +{ + int resolved; + valueT final_val = 0; + segT final_seg; + +#ifdef BFD_ASSEMBLER + if (LOCAL_SYMBOL_CHECK (symp)) + { + struct local_symbol *locsym = (struct local_symbol *) symp; + + final_val = locsym->lsy_value; + if (local_symbol_resolved_p (locsym)) + return final_val; + + final_val += local_symbol_get_frag (locsym)->fr_address / OCTETS_PER_BYTE; + + if (finalize_syms) + { + locsym->lsy_value = final_val; + local_symbol_mark_resolved (locsym); + } + + return final_val; + } +#endif + + if (symp->sy_resolved) + { + if (symp->sy_value.X_op == O_constant) + return (valueT) symp->sy_value.X_add_number; + else + return 0; + } + + resolved = 0; + final_seg = S_GET_SEGMENT (symp); + + if (symp->sy_resolving) + { + if (finalize_syms) + as_bad (_("symbol definition loop encountered at `%s'"), + S_GET_NAME (symp)); + final_val = 0; + resolved = 1; + } + else + { + symbolS *add_symbol, *op_symbol; + offsetT left, right; + segT seg_left, seg_right; + operatorT op; + + symp->sy_resolving = 1; + + /* Help out with CSE. */ + add_symbol = symp->sy_value.X_add_symbol; + op_symbol = symp->sy_value.X_op_symbol; + final_val = symp->sy_value.X_add_number; + op = symp->sy_value.X_op; + + switch (op) + { + default: + BAD_CASE (op); + break; + + case O_absent: + final_val = 0; + /* Fall through. */ + + case O_constant: + final_val += symp->sy_frag->fr_address / OCTETS_PER_BYTE; + if (final_seg == expr_section) + final_seg = absolute_section; + resolved = 1; + break; + + case O_symbol: + case O_symbol_rva: + left = resolve_symbol_value (add_symbol); + seg_left = S_GET_SEGMENT (add_symbol); + if (finalize_syms) + symp->sy_value.X_op_symbol = NULL; + + do_symbol: + if (symp->sy_mri_common) + { + /* This is a symbol inside an MRI common section. The + relocation routines are going to handle it specially. + Don't change the value. */ + resolved = symbol_resolved_p (add_symbol); + break; + } + + if (finalize_syms && final_val == 0) + { + if (LOCAL_SYMBOL_CHECK (add_symbol)) + add_symbol = local_symbol_convert ((struct local_symbol *) + add_symbol); + copy_symbol_attributes (symp, add_symbol); + } + + /* If we have equated this symbol to an undefined or common + symbol, keep X_op set to O_symbol, and don't change + X_add_number. This permits the routine which writes out + relocation to detect this case, and convert the + relocation to be against the symbol to which this symbol + is equated. */ + if (! S_IS_DEFINED (add_symbol) || S_IS_COMMON (add_symbol)) + { + if (finalize_syms) + { + symp->sy_value.X_op = O_symbol; + symp->sy_value.X_add_symbol = add_symbol; + symp->sy_value.X_add_number = final_val; + /* Use X_op_symbol as a flag. */ + symp->sy_value.X_op_symbol = add_symbol; + final_seg = seg_left; + } + final_val = 0; + resolved = symbol_resolved_p (add_symbol); + symp->sy_resolving = 0; + goto exit_dont_set_value; + } + else if (finalize_syms && final_seg == expr_section + && seg_left != expr_section) + { + /* If the symbol is an expression symbol, do similarly + as for undefined and common syms above. Handles + "sym +/- expr" where "expr" cannot be evaluated + immediately, and we want relocations to be against + "sym", eg. because it is weak. */ + symp->sy_value.X_op = O_symbol; + symp->sy_value.X_add_symbol = add_symbol; + symp->sy_value.X_add_number = final_val; + symp->sy_value.X_op_symbol = add_symbol; + final_seg = seg_left; + final_val += symp->sy_frag->fr_address + left; + resolved = symbol_resolved_p (add_symbol); + symp->sy_resolving = 0; + goto exit_dont_set_value; + } + else + { + final_val += symp->sy_frag->fr_address + left; + if (final_seg == expr_section || final_seg == undefined_section) + final_seg = seg_left; + } + + resolved = symbol_resolved_p (add_symbol); + break; + + case O_uminus: + case O_bit_not: + case O_logical_not: + left = resolve_symbol_value (add_symbol); + seg_left = S_GET_SEGMENT (add_symbol); + + /* By reducing these to the relevant dyadic operator, we get + !S -> S == 0 permitted on anything, + -S -> 0 - S only permitted on absolute + ~S -> S ^ ~0 only permitted on absolute */ + if (op != O_logical_not && seg_left != absolute_section + && finalize_syms) + report_op_error (symp, add_symbol, NULL); + + if (final_seg == expr_section || final_seg == undefined_section) + final_seg = absolute_section; + + if (op == O_uminus) + left = -left; + else if (op == O_logical_not) + left = !left; + else + left = ~left; + + final_val += left + symp->sy_frag->fr_address; + + resolved = symbol_resolved_p (add_symbol); + break; + + case O_multiply: + case O_divide: + case O_modulus: + case O_left_shift: + case O_right_shift: + case O_bit_inclusive_or: + case O_bit_or_not: + case O_bit_exclusive_or: + case O_bit_and: + case O_add: + case O_subtract: + case O_eq: + case O_ne: + case O_lt: + case O_le: + case O_ge: + case O_gt: + case O_logical_and: + case O_logical_or: + left = resolve_symbol_value (add_symbol); + right = resolve_symbol_value (op_symbol); + seg_left = S_GET_SEGMENT (add_symbol); + seg_right = S_GET_SEGMENT (op_symbol); + + /* Simplify addition or subtraction of a constant by folding the + constant into X_add_number. */ + if (op == O_add) + { + if (seg_right == absolute_section) + { + final_val += right; + goto do_symbol; + } + else if (seg_left == absolute_section) + { + final_val += left; + add_symbol = op_symbol; + left = right; + seg_left = seg_right; + goto do_symbol; + } + } + else if (op == O_subtract) + { + if (seg_right == absolute_section) + { + final_val -= right; + goto do_symbol; + } + } + + /* Equality and non-equality tests are permitted on anything. + Subtraction, and other comparison operators are permitted if + both operands are in the same section. Otherwise, both + operands must be absolute. We already handled the case of + addition or subtraction of a constant above. This will + probably need to be changed for an object file format which + supports arbitrary expressions, such as IEEE-695. + + Don't emit messages unless we're finalizing the symbol value, + otherwise we may get the same message multiple times. */ + if (finalize_syms + && !(seg_left == absolute_section + && seg_right == absolute_section) + && !(op == O_eq || op == O_ne) + && !((op == O_subtract + || op == O_lt || op == O_le || op == O_ge || op == O_gt) + && seg_left == seg_right + && (seg_left != undefined_section + || add_symbol == op_symbol))) + report_op_error (symp, add_symbol, op_symbol); + + if (final_seg == expr_section || final_seg == undefined_section) + final_seg = absolute_section; + + /* Check for division by zero. */ + if ((op == O_divide || op == O_modulus) && right == 0) + { + /* If seg_right is not absolute_section, then we've + already issued a warning about using a bad symbol. */ + if (seg_right == absolute_section && finalize_syms) + { + char *file; + unsigned int line; + + if (expr_symbol_where (symp, &file, &line)) + as_bad_where (file, line, _("division by zero")); + else + as_bad (_("division by zero when setting `%s'"), + S_GET_NAME (symp)); + } + + right = 1; + } + + switch (symp->sy_value.X_op) + { + case O_multiply: left *= right; break; + case O_divide: left /= right; break; + case O_modulus: left %= right; break; + case O_left_shift: left <<= right; break; + case O_right_shift: left >>= right; break; + case O_bit_inclusive_or: left |= right; break; + case O_bit_or_not: left |= ~right; break; + case O_bit_exclusive_or: left ^= right; break; + case O_bit_and: left &= right; break; + case O_add: left += right; break; + case O_subtract: left -= right; break; + case O_eq: + case O_ne: + left = (left == right && seg_left == seg_right + && (seg_left != undefined_section + || add_symbol == op_symbol) + ? ~ (offsetT) 0 : 0); + if (symp->sy_value.X_op == O_ne) + left = ~left; + break; + case O_lt: left = left < right ? ~ (offsetT) 0 : 0; break; + case O_le: left = left <= right ? ~ (offsetT) 0 : 0; break; + case O_ge: left = left >= right ? ~ (offsetT) 0 : 0; break; + case O_gt: left = left > right ? ~ (offsetT) 0 : 0; break; + case O_logical_and: left = left && right; break; + case O_logical_or: left = left || right; break; + default: abort (); + } + + final_val += symp->sy_frag->fr_address + left; + if (final_seg == expr_section || final_seg == undefined_section) + { + if (seg_left == undefined_section + || seg_right == undefined_section) + final_seg = undefined_section; + else if (seg_left == absolute_section) + final_seg = seg_right; + else + final_seg = seg_left; + } + resolved = (symbol_resolved_p (add_symbol) + && symbol_resolved_p (op_symbol)); + break; + + case O_register: + case O_big: + case O_illegal: + /* Give an error (below) if not in expr_section. We don't + want to worry about expr_section symbols, because they + are fictional (they are created as part of expression + resolution), and any problems may not actually mean + anything. */ + break; + } + + symp->sy_resolving = 0; + } + + if (finalize_syms) + S_SET_VALUE (symp, final_val); + +exit_dont_set_value: + /* Always set the segment, even if not finalizing the value. + The segment is used to determine whether a symbol is defined. */ +#if defined (OBJ_AOUT) && ! defined (BFD_ASSEMBLER) + /* The old a.out backend does not handle S_SET_SEGMENT correctly + for a stab symbol, so we use this bad hack. */ + if (final_seg != S_GET_SEGMENT (symp)) +#endif + S_SET_SEGMENT (symp, final_seg); + + /* Don't worry if we can't resolve an expr_section symbol. */ + if (finalize_syms) + { + if (resolved) + symp->sy_resolved = 1; + else if (S_GET_SEGMENT (symp) != expr_section) + { + as_bad (_("can't resolve value for symbol `%s'"), + S_GET_NAME (symp)); + symp->sy_resolved = 1; + } + } + + return final_val; +} + +#ifdef BFD_ASSEMBLER + +static void resolve_local_symbol (const char *, PTR); + +/* A static function passed to hash_traverse. */ + +static void +resolve_local_symbol (const char *key ATTRIBUTE_UNUSED, PTR value) +{ + if (value != NULL) + resolve_symbol_value (value); +} + +#endif + +/* Resolve all local symbols. */ + +void +resolve_local_symbol_values (void) +{ +#ifdef BFD_ASSEMBLER + hash_traverse (local_hash, resolve_local_symbol); +#endif +} + +/* Dollar labels look like a number followed by a dollar sign. Eg, "42$". + They are *really* local. That is, they go out of scope whenever we see a + label that isn't local. Also, like fb labels, there can be multiple + instances of a dollar label. Therefor, we name encode each instance with + the instance number, keep a list of defined symbols separate from the real + symbol table, and we treat these buggers as a sparse array. */ + +static long *dollar_labels; +static long *dollar_label_instances; +static char *dollar_label_defines; +static unsigned long dollar_label_count; +static unsigned long dollar_label_max; + +int +dollar_label_defined (long label) +{ + long *i; + + know ((dollar_labels != NULL) || (dollar_label_count == 0)); + + for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i) + if (*i == label) + return dollar_label_defines[i - dollar_labels]; + + /* If we get here, label isn't defined. */ + return 0; +} + +static long +dollar_label_instance (long label) +{ + long *i; + + know ((dollar_labels != NULL) || (dollar_label_count == 0)); + + for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i) + if (*i == label) + return (dollar_label_instances[i - dollar_labels]); + + /* If we get here, we haven't seen the label before. + Therefore its instance count is zero. */ + return 0; +} + +void +dollar_label_clear (void) +{ + memset (dollar_label_defines, '\0', (unsigned int) dollar_label_count); +} + +#define DOLLAR_LABEL_BUMP_BY 10 + +void +define_dollar_label (long label) +{ + long *i; + + for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i) + if (*i == label) + { + ++dollar_label_instances[i - dollar_labels]; + dollar_label_defines[i - dollar_labels] = 1; + return; + } + + /* If we get to here, we don't have label listed yet. */ + + if (dollar_labels == NULL) + { + dollar_labels = (long *) xmalloc (DOLLAR_LABEL_BUMP_BY * sizeof (long)); + dollar_label_instances = (long *) xmalloc (DOLLAR_LABEL_BUMP_BY * sizeof (long)); + dollar_label_defines = xmalloc (DOLLAR_LABEL_BUMP_BY); + dollar_label_max = DOLLAR_LABEL_BUMP_BY; + dollar_label_count = 0; + } + else if (dollar_label_count == dollar_label_max) + { + dollar_label_max += DOLLAR_LABEL_BUMP_BY; + dollar_labels = (long *) xrealloc ((char *) dollar_labels, + dollar_label_max * sizeof (long)); + dollar_label_instances = (long *) xrealloc ((char *) dollar_label_instances, + dollar_label_max * sizeof (long)); + dollar_label_defines = xrealloc (dollar_label_defines, dollar_label_max); + } /* if we needed to grow */ + + dollar_labels[dollar_label_count] = label; + dollar_label_instances[dollar_label_count] = 1; + dollar_label_defines[dollar_label_count] = 1; + ++dollar_label_count; +} + +/* Caller must copy returned name: we re-use the area for the next name. + + The mth occurence of label n: is turned into the symbol "Ln^Am" + where n is the label number and m is the instance number. "L" makes + it a label discarded unless debugging and "^A"('\1') ensures no + ordinary symbol SHOULD get the same name as a local label + symbol. The first "4:" is "L4^A1" - the m numbers begin at 1. + + fb labels get the same treatment, except that ^B is used in place + of ^A. */ + +char * /* Return local label name. */ +dollar_label_name (register long n, /* we just saw "n$:" : n a number. */ + register int augend /* 0 for current instance, 1 for new instance. */) +{ + long i; + /* Returned to caller, then copied. Used for created names ("4f"). */ + static char symbol_name_build[24]; + register char *p; + register char *q; + char symbol_name_temporary[20]; /* Build up a number, BACKWARDS. */ + + know (n >= 0); + know (augend == 0 || augend == 1); + p = symbol_name_build; +#ifdef LOCAL_LABEL_PREFIX + *p++ = LOCAL_LABEL_PREFIX; +#endif + *p++ = 'L'; + + /* Next code just does sprintf( {}, "%d", n); */ + /* Label number. */ + q = symbol_name_temporary; + for (*q++ = 0, i = n; i; ++q) + { + *q = i % 10 + '0'; + i /= 10; + } + while ((*p = *--q) != '\0') + ++p; + + *p++ = DOLLAR_LABEL_CHAR; /* ^A */ + + /* Instance number. */ + q = symbol_name_temporary; + for (*q++ = 0, i = dollar_label_instance (n) + augend; i; ++q) + { + *q = i % 10 + '0'; + i /= 10; + } + while ((*p++ = *--q) != '\0');; + + /* The label, as a '\0' ended string, starts at symbol_name_build. */ + return symbol_name_build; +} + +/* Somebody else's idea of local labels. They are made by "n:" where n + is any decimal digit. Refer to them with + "nb" for previous (backward) n: + or "nf" for next (forward) n:. + + We do a little better and let n be any number, not just a single digit, but + since the other guy's assembler only does ten, we treat the first ten + specially. + + Like someone else's assembler, we have one set of local label counters for + entire assembly, not one set per (sub)segment like in most assemblers. This + implies that one can refer to a label in another segment, and indeed some + crufty compilers have done just that. + + Since there could be a LOT of these things, treat them as a sparse + array. */ + +#define FB_LABEL_SPECIAL (10) + +static long fb_low_counter[FB_LABEL_SPECIAL]; +static long *fb_labels; +static long *fb_label_instances; +static long fb_label_count; +static long fb_label_max; + +/* This must be more than FB_LABEL_SPECIAL. */ +#define FB_LABEL_BUMP_BY (FB_LABEL_SPECIAL + 6) + +static void +fb_label_init (void) +{ + memset ((void *) fb_low_counter, '\0', sizeof (fb_low_counter)); +} + +/* Add one to the instance number of this fb label. */ + +void +fb_label_instance_inc (long label) +{ + long *i; + + if (label < FB_LABEL_SPECIAL) + { + ++fb_low_counter[label]; + return; + } + + if (fb_labels != NULL) + { + for (i = fb_labels + FB_LABEL_SPECIAL; + i < fb_labels + fb_label_count; ++i) + { + if (*i == label) + { + ++fb_label_instances[i - fb_labels]; + return; + } /* if we find it */ + } /* for each existing label */ + } + + /* If we get to here, we don't have label listed yet. */ + + if (fb_labels == NULL) + { + fb_labels = (long *) xmalloc (FB_LABEL_BUMP_BY * sizeof (long)); + fb_label_instances = (long *) xmalloc (FB_LABEL_BUMP_BY * sizeof (long)); + fb_label_max = FB_LABEL_BUMP_BY; + fb_label_count = FB_LABEL_SPECIAL; + + } + else if (fb_label_count == fb_label_max) + { + fb_label_max += FB_LABEL_BUMP_BY; + fb_labels = (long *) xrealloc ((char *) fb_labels, + fb_label_max * sizeof (long)); + fb_label_instances = (long *) xrealloc ((char *) fb_label_instances, + fb_label_max * sizeof (long)); + } /* if we needed to grow */ + + fb_labels[fb_label_count] = label; + fb_label_instances[fb_label_count] = 1; + ++fb_label_count; +} + +static long +fb_label_instance (long label) +{ + long *i; + + if (label < FB_LABEL_SPECIAL) + { + return (fb_low_counter[label]); + } + + if (fb_labels != NULL) + { + for (i = fb_labels + FB_LABEL_SPECIAL; + i < fb_labels + fb_label_count; ++i) + { + if (*i == label) + { + return (fb_label_instances[i - fb_labels]); + } /* if we find it */ + } /* for each existing label */ + } + + /* We didn't find the label, so this must be a reference to the + first instance. */ + return 0; +} + +/* Caller must copy returned name: we re-use the area for the next name. + + The mth occurence of label n: is turned into the symbol "Ln^Bm" + where n is the label number and m is the instance number. "L" makes + it a label discarded unless debugging and "^B"('\2') ensures no + ordinary symbol SHOULD get the same name as a local label + symbol. The first "4:" is "L4^B1" - the m numbers begin at 1. + + dollar labels get the same treatment, except that ^A is used in + place of ^B. */ + +char * /* Return local label name. */ +fb_label_name (long n, /* We just saw "n:", "nf" or "nb" : n a number. */ + long augend /* 0 for nb, 1 for n:, nf. */) +{ + long i; + /* Returned to caller, then copied. Used for created names ("4f"). */ + static char symbol_name_build[24]; + register char *p; + register char *q; + char symbol_name_temporary[20]; /* Build up a number, BACKWARDS. */ + + know (n >= 0); + know (augend == 0 || augend == 1); + p = symbol_name_build; +#ifdef LOCAL_LABEL_PREFIX + *p++ = LOCAL_LABEL_PREFIX; +#endif + *p++ = 'L'; + + /* Next code just does sprintf( {}, "%d", n); */ + /* Label number. */ + q = symbol_name_temporary; + for (*q++ = 0, i = n; i; ++q) + { + *q = i % 10 + '0'; + i /= 10; + } + while ((*p = *--q) != '\0') + ++p; + + *p++ = LOCAL_LABEL_CHAR; /* ^B */ + + /* Instance number. */ + q = symbol_name_temporary; + for (*q++ = 0, i = fb_label_instance (n) + augend; i; ++q) + { + *q = i % 10 + '0'; + i /= 10; + } + while ((*p++ = *--q) != '\0');; + + /* The label, as a '\0' ended string, starts at symbol_name_build. */ + return (symbol_name_build); +} + +/* Decode name that may have been generated by foo_label_name() above. + If the name wasn't generated by foo_label_name(), then return it + unaltered. This is used for error messages. */ + +char * +decode_local_label_name (char *s) +{ + char *p; + char *symbol_decode; + int label_number; + int instance_number; + char *type; + const char *message_format; + int index = 0; + +#ifdef LOCAL_LABEL_PREFIX + if (s[index] == LOCAL_LABEL_PREFIX) + ++index; +#endif + + if (s[index] != 'L') + return s; + + for (label_number = 0, p = s + index + 1; ISDIGIT (*p); ++p) + label_number = (10 * label_number) + *p - '0'; + + if (*p == DOLLAR_LABEL_CHAR) + type = "dollar"; + else if (*p == LOCAL_LABEL_CHAR) + type = "fb"; + else + return s; + + for (instance_number = 0, p++; ISDIGIT (*p); ++p) + instance_number = (10 * instance_number) + *p - '0'; + + message_format = _("\"%d\" (instance number %d of a %s label)"); + symbol_decode = obstack_alloc (¬es, strlen (message_format) + 30); + sprintf (symbol_decode, message_format, label_number, instance_number, type); + + return symbol_decode; +} + +/* Get the value of a symbol. */ + +valueT +S_GET_VALUE (symbolS *s) +{ +#ifdef BFD_ASSEMBLER + if (LOCAL_SYMBOL_CHECK (s)) + return resolve_symbol_value (s); +#endif + + if (!s->sy_resolved) + { + valueT val = resolve_symbol_value (s); + if (!finalize_syms) + return val; + } + if (s->sy_value.X_op != O_constant) + { + static symbolS *recur; + + /* FIXME: In non BFD assemblers, S_IS_DEFINED and S_IS_COMMON + may call S_GET_VALUE. We use a static symbol to avoid the + immediate recursion. */ + if (recur == s) + return (valueT) s->sy_value.X_add_number; + recur = s; + if (! s->sy_resolved + || s->sy_value.X_op != O_symbol + || (S_IS_DEFINED (s) && ! S_IS_COMMON (s))) + as_bad (_("attempt to get value of unresolved symbol `%s'"), + S_GET_NAME (s)); + recur = NULL; + } + return (valueT) s->sy_value.X_add_number; +} + +/* Set the value of a symbol. */ + +void +S_SET_VALUE (symbolS *s, valueT val) +{ +#ifdef BFD_ASSEMBLER + if (LOCAL_SYMBOL_CHECK (s)) + { + ((struct local_symbol *) s)->lsy_value = val; + return; + } +#endif + + s->sy_value.X_op = O_constant; + s->sy_value.X_add_number = (offsetT) val; + s->sy_value.X_unsigned = 0; +} + +void +copy_symbol_attributes (symbolS *dest, symbolS *src) +{ + if (LOCAL_SYMBOL_CHECK (dest)) + dest = local_symbol_convert ((struct local_symbol *) dest); + if (LOCAL_SYMBOL_CHECK (src)) + src = local_symbol_convert ((struct local_symbol *) src); + +#ifdef BFD_ASSEMBLER + /* In an expression, transfer the settings of these flags. + The user can override later, of course. */ +#define COPIED_SYMFLAGS (BSF_FUNCTION | BSF_OBJECT) + dest->bsym->flags |= src->bsym->flags & COPIED_SYMFLAGS; +#endif + +#ifdef OBJ_COPY_SYMBOL_ATTRIBUTES + OBJ_COPY_SYMBOL_ATTRIBUTES (dest, src); +#endif +} + +#ifdef BFD_ASSEMBLER + +int +S_IS_FUNCTION (symbolS *s) +{ + flagword flags; + + if (LOCAL_SYMBOL_CHECK (s)) + return 0; + + flags = s->bsym->flags; + + return (flags & BSF_FUNCTION) != 0; +} + +int +S_IS_EXTERNAL (symbolS *s) +{ + flagword flags; + + if (LOCAL_SYMBOL_CHECK (s)) + return 0; + + flags = s->bsym->flags; + + /* Sanity check. */ + if ((flags & BSF_LOCAL) && (flags & BSF_GLOBAL)) + abort (); + + return (flags & BSF_GLOBAL) != 0; +} + +int +S_IS_WEAK (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return 0; + return (s->bsym->flags & BSF_WEAK) != 0; +} + +int +S_IS_COMMON (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return 0; + return bfd_is_com_section (s->bsym->section); +} + +int +S_IS_DEFINED (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return ((struct local_symbol *) s)->lsy_section != undefined_section; + return s->bsym->section != undefined_section; +} + + +#ifndef EXTERN_FORCE_RELOC +#define EXTERN_FORCE_RELOC IS_ELF +#endif + +/* Return true for symbols that should not be reduced to section + symbols or eliminated from expressions, because they may be + overridden by the linker. */ +int +S_FORCE_RELOC (symbolS *s, int strict) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return ((struct local_symbol *) s)->lsy_section == undefined_section; + + return ((strict + && ((s->bsym->flags & BSF_WEAK) != 0 + || (EXTERN_FORCE_RELOC + && (s->bsym->flags & BSF_GLOBAL) != 0))) + || s->bsym->section == undefined_section + || bfd_is_com_section (s->bsym->section)); +} + +int +S_IS_DEBUG (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return 0; + if (s->bsym->flags & BSF_DEBUGGING) + return 1; + return 0; +} + +int +S_IS_LOCAL (symbolS *s) +{ + flagword flags; + const char *name; + + if (LOCAL_SYMBOL_CHECK (s)) + return 1; + + flags = s->bsym->flags; + + /* Sanity check. */ + if ((flags & BSF_LOCAL) && (flags & BSF_GLOBAL)) + abort (); + + if (bfd_get_section (s->bsym) == reg_section) + return 1; + + if (flag_strip_local_absolute + && (flags & BSF_GLOBAL) == 0 + && bfd_get_section (s->bsym) == absolute_section) + return 1; + + name = S_GET_NAME (s); + return (name != NULL + && ! S_IS_DEBUG (s) + && (strchr (name, DOLLAR_LABEL_CHAR) + || strchr (name, LOCAL_LABEL_CHAR) + || (! flag_keep_locals + && (bfd_is_local_label (stdoutput, s->bsym) + || (flag_mri + && name[0] == '?' + && name[1] == '?'))))); +} + +int +S_IS_EXTERN (symbolS *s) +{ + return S_IS_EXTERNAL (s); +} + +int +S_IS_STABD (symbolS *s) +{ + return S_GET_NAME (s) == 0; +} + +const char * +S_GET_NAME (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return ((struct local_symbol *) s)->lsy_name; + return s->bsym->name; +} + +segT +S_GET_SEGMENT (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return ((struct local_symbol *) s)->lsy_section; + return s->bsym->section; +} + +void +S_SET_SEGMENT (symbolS *s, segT seg) +{ + /* Don't reassign section symbols. The direct reason is to prevent seg + faults assigning back to const global symbols such as *ABS*, but it + shouldn't happen anyway. */ + + if (LOCAL_SYMBOL_CHECK (s)) + { + if (seg == reg_section) + s = local_symbol_convert ((struct local_symbol *) s); + else + { + ((struct local_symbol *) s)->lsy_section = seg; + return; + } + } + + if (s->bsym->flags & BSF_SECTION_SYM) + { + if (s->bsym->section != seg) + abort (); + } + else + s->bsym->section = seg; +} + +void +S_SET_EXTERNAL (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + if ((s->bsym->flags & BSF_WEAK) != 0) + { + /* Let .weak override .global. */ + return; + } + if (s->bsym->flags & BSF_SECTION_SYM) + { + char * file; + unsigned int line; + + /* Do not reassign section symbols. */ + as_where (& file, & line); + as_warn_where (file, line, + _("section symbols are already global")); + return; + } + s->bsym->flags |= BSF_GLOBAL; + s->bsym->flags &= ~(BSF_LOCAL | BSF_WEAK); +} + +void +S_CLEAR_EXTERNAL (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return; + if ((s->bsym->flags & BSF_WEAK) != 0) + { + /* Let .weak override. */ + return; + } + s->bsym->flags |= BSF_LOCAL; + s->bsym->flags &= ~(BSF_GLOBAL | BSF_WEAK); +} + +void +S_SET_WEAK (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + s->bsym->flags |= BSF_WEAK; + s->bsym->flags &= ~(BSF_GLOBAL | BSF_LOCAL); +} + +void +S_SET_THREAD_LOCAL (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + if (bfd_is_com_section (s->bsym->section) + && (s->bsym->flags & BSF_THREAD_LOCAL) != 0) + return; + s->bsym->flags |= BSF_THREAD_LOCAL; + if ((s->bsym->flags & BSF_FUNCTION) != 0) + as_bad (_("Accessing function `%s' as thread-local object"), + S_GET_NAME (s)); + else if (! bfd_is_und_section (s->bsym->section) + && (s->bsym->section->flags & SEC_THREAD_LOCAL) == 0) + as_bad (_("Accessing `%s' as thread-local object"), + S_GET_NAME (s)); +} + +void +S_SET_NAME (symbolS *s, char *name) +{ + if (LOCAL_SYMBOL_CHECK (s)) + { + ((struct local_symbol *) s)->lsy_name = name; + return; + } + s->bsym->name = name; +} +#endif /* BFD_ASSEMBLER */ + +#ifdef SYMBOLS_NEED_BACKPOINTERS + +/* Return the previous symbol in a chain. */ + +symbolS * +symbol_previous (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + abort (); + return s->sy_previous; +} + +#endif /* SYMBOLS_NEED_BACKPOINTERS */ + +/* Return the next symbol in a chain. */ + +symbolS * +symbol_next (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + abort (); + return s->sy_next; +} + +/* Return a pointer to the value of a symbol as an expression. */ + +expressionS * +symbol_get_value_expression (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + return &s->sy_value; +} + +/* Set the value of a symbol to an expression. */ + +void +symbol_set_value_expression (symbolS *s, const expressionS *exp) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + s->sy_value = *exp; +} + +/* Set the value of SYM to the current position in the current segment. */ + +void +symbol_set_value_now (symbolS *sym) +{ + S_SET_SEGMENT (sym, now_seg); + S_SET_VALUE (sym, frag_now_fix ()); + symbol_set_frag (sym, frag_now); +} + +/* Set the frag of a symbol. */ + +void +symbol_set_frag (symbolS *s, fragS *f) +{ +#ifdef BFD_ASSEMBLER + if (LOCAL_SYMBOL_CHECK (s)) + { + local_symbol_set_frag ((struct local_symbol *) s, f); + return; + } +#endif + s->sy_frag = f; +} + +/* Return the frag of a symbol. */ + +fragS * +symbol_get_frag (symbolS *s) +{ +#ifdef BFD_ASSEMBLER + if (LOCAL_SYMBOL_CHECK (s)) + return local_symbol_get_frag ((struct local_symbol *) s); +#endif + return s->sy_frag; +} + +/* Mark a symbol as having been used. */ + +void +symbol_mark_used (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return; + s->sy_used = 1; +} + +/* Clear the mark of whether a symbol has been used. */ + +void +symbol_clear_used (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + s->sy_used = 0; +} + +/* Return whether a symbol has been used. */ + +int +symbol_used_p (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return 1; + return s->sy_used; +} + +/* Mark a symbol as having been used in a reloc. */ + +void +symbol_mark_used_in_reloc (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + s->sy_used_in_reloc = 1; +} + +/* Clear the mark of whether a symbol has been used in a reloc. */ + +void +symbol_clear_used_in_reloc (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return; + s->sy_used_in_reloc = 0; +} + +/* Return whether a symbol has been used in a reloc. */ + +int +symbol_used_in_reloc_p (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return 0; + return s->sy_used_in_reloc; +} + +/* Mark a symbol as an MRI common symbol. */ + +void +symbol_mark_mri_common (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + s->sy_mri_common = 1; +} + +/* Clear the mark of whether a symbol is an MRI common symbol. */ + +void +symbol_clear_mri_common (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return; + s->sy_mri_common = 0; +} + +/* Return whether a symbol is an MRI common symbol. */ + +int +symbol_mri_common_p (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return 0; + return s->sy_mri_common; +} + +/* Mark a symbol as having been written. */ + +void +symbol_mark_written (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return; + s->written = 1; +} + +/* Clear the mark of whether a symbol has been written. */ + +void +symbol_clear_written (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return; + s->written = 0; +} + +/* Return whether a symbol has been written. */ + +int +symbol_written_p (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return 0; + return s->written; +} + +/* Mark a symbol has having been resolved. */ + +void +symbol_mark_resolved (symbolS *s) +{ +#ifdef BFD_ASSEMBLER + if (LOCAL_SYMBOL_CHECK (s)) + { + local_symbol_mark_resolved ((struct local_symbol *) s); + return; + } +#endif + s->sy_resolved = 1; +} + +/* Return whether a symbol has been resolved. */ + +int +symbol_resolved_p (symbolS *s) +{ +#ifdef BFD_ASSEMBLER + if (LOCAL_SYMBOL_CHECK (s)) + return local_symbol_resolved_p ((struct local_symbol *) s); +#endif + return s->sy_resolved; +} + +/* Return whether a symbol is a section symbol. */ + +int +symbol_section_p (symbolS *s ATTRIBUTE_UNUSED) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return 0; +#ifdef BFD_ASSEMBLER + return (s->bsym->flags & BSF_SECTION_SYM) != 0; +#else + /* FIXME. */ + return 0; +#endif +} + +/* Return whether a symbol is equated to another symbol. */ + +int +symbol_equated_p (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return 0; + return s->sy_value.X_op == O_symbol; +} + +/* Return whether a symbol is equated to another symbol, and should be + treated specially when writing out relocs. */ + +int +symbol_equated_reloc_p (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return 0; + /* X_op_symbol, normally not used for O_symbol, is set by + resolve_symbol_value to flag expression syms that have been + equated. */ + return (s->sy_value.X_op == O_symbol + && ((s->sy_resolved && s->sy_value.X_op_symbol != NULL) + || ! S_IS_DEFINED (s) + || S_IS_COMMON (s))); +} + +/* Return whether a symbol has a constant value. */ + +int +symbol_constant_p (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return 1; + return s->sy_value.X_op == O_constant; +} + +#ifdef BFD_ASSEMBLER + +/* Return the BFD symbol for a symbol. */ + +asymbol * +symbol_get_bfdsym (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + return s->bsym; +} + +/* Set the BFD symbol for a symbol. */ + +void +symbol_set_bfdsym (symbolS *s, asymbol *bsym) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + s->bsym = bsym; +} + +#endif /* BFD_ASSEMBLER */ + +#ifdef OBJ_SYMFIELD_TYPE + +/* Get a pointer to the object format information for a symbol. */ + +OBJ_SYMFIELD_TYPE * +symbol_get_obj (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + return &s->sy_obj; +} + +/* Set the object format information for a symbol. */ + +void +symbol_set_obj (symbolS *s, OBJ_SYMFIELD_TYPE *o) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + s->sy_obj = *o; +} + +#endif /* OBJ_SYMFIELD_TYPE */ + +#ifdef TC_SYMFIELD_TYPE + +/* Get a pointer to the processor information for a symbol. */ + +TC_SYMFIELD_TYPE * +symbol_get_tc (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + return &s->sy_tc; +} + +/* Set the processor information for a symbol. */ + +void +symbol_set_tc (symbolS *s, TC_SYMFIELD_TYPE *o) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + s->sy_tc = *o; +} + +#endif /* TC_SYMFIELD_TYPE */ + +void +symbol_begin (void) +{ + symbol_lastP = NULL; + symbol_rootP = NULL; /* In case we have 0 symbols (!!) */ + sy_hash = hash_new (); +#ifdef BFD_ASSEMBLER + local_hash = hash_new (); +#endif + + memset ((char *) (&abs_symbol), '\0', sizeof (abs_symbol)); +#ifdef BFD_ASSEMBLER +#if defined (EMIT_SECTION_SYMBOLS) || !defined (RELOC_REQUIRES_SYMBOL) + abs_symbol.bsym = bfd_abs_section.symbol; +#endif +#else + /* Can't initialise a union. Sigh. */ + S_SET_SEGMENT (&abs_symbol, absolute_section); +#endif + abs_symbol.sy_value.X_op = O_constant; + abs_symbol.sy_frag = &zero_address_frag; + + if (LOCAL_LABELS_FB) + fb_label_init (); +} + +int indent_level; + +/* Maximum indent level. + Available for modification inside a gdb session. */ +int max_indent_level = 8; + +#if 0 + +static void +indent (void) +{ + printf ("%*s", indent_level * 4, ""); +} + +#endif + +void +print_symbol_value_1 (FILE *file, symbolS *sym) +{ + const char *name = S_GET_NAME (sym); + if (!name || !name[0]) + name = "(unnamed)"; + fprintf (file, "sym %lx %s", (unsigned long) sym, name); + + if (LOCAL_SYMBOL_CHECK (sym)) + { +#ifdef BFD_ASSEMBLER + struct local_symbol *locsym = (struct local_symbol *) sym; + if (local_symbol_get_frag (locsym) != &zero_address_frag + && local_symbol_get_frag (locsym) != NULL) + fprintf (file, " frag %lx", (long) local_symbol_get_frag (locsym)); + if (local_symbol_resolved_p (locsym)) + fprintf (file, " resolved"); + fprintf (file, " local"); +#endif + } + else + { + if (sym->sy_frag != &zero_address_frag) + fprintf (file, " frag %lx", (long) sym->sy_frag); + if (sym->written) + fprintf (file, " written"); + if (sym->sy_resolved) + fprintf (file, " resolved"); + else if (sym->sy_resolving) + fprintf (file, " resolving"); + if (sym->sy_used_in_reloc) + fprintf (file, " used-in-reloc"); + if (sym->sy_used) + fprintf (file, " used"); + if (S_IS_LOCAL (sym)) + fprintf (file, " local"); + if (S_IS_EXTERN (sym)) + fprintf (file, " extern"); + if (S_IS_DEBUG (sym)) + fprintf (file, " debug"); + if (S_IS_DEFINED (sym)) + fprintf (file, " defined"); + } + fprintf (file, " %s", segment_name (S_GET_SEGMENT (sym))); + if (symbol_resolved_p (sym)) + { + segT s = S_GET_SEGMENT (sym); + + if (s != undefined_section + && s != expr_section) + fprintf (file, " %lx", (long) S_GET_VALUE (sym)); + } + else if (indent_level < max_indent_level + && S_GET_SEGMENT (sym) != undefined_section) + { + indent_level++; + fprintf (file, "\n%*s<", indent_level * 4, ""); +#ifdef BFD_ASSEMBLER + if (LOCAL_SYMBOL_CHECK (sym)) + fprintf (file, "constant %lx", + (long) ((struct local_symbol *) sym)->lsy_value); + else +#endif + print_expr_1 (file, &sym->sy_value); + fprintf (file, ">"); + indent_level--; + } + fflush (file); +} + +void +print_symbol_value (symbolS *sym) +{ + indent_level = 0; + print_symbol_value_1 (stderr, sym); + fprintf (stderr, "\n"); +} + +static void +print_binary (FILE *file, const char *name, expressionS *exp) +{ + indent_level++; + fprintf (file, "%s\n%*s<", name, indent_level * 4, ""); + print_symbol_value_1 (file, exp->X_add_symbol); + fprintf (file, ">\n%*s<", indent_level * 4, ""); + print_symbol_value_1 (file, exp->X_op_symbol); + fprintf (file, ">"); + indent_level--; +} + +void +print_expr_1 (FILE *file, expressionS *exp) +{ + fprintf (file, "expr %lx ", (long) exp); + switch (exp->X_op) + { + case O_illegal: + fprintf (file, "illegal"); + break; + case O_absent: + fprintf (file, "absent"); + break; + case O_constant: + fprintf (file, "constant %lx", (long) exp->X_add_number); + break; + case O_symbol: + indent_level++; + fprintf (file, "symbol\n%*s<", indent_level * 4, ""); + print_symbol_value_1 (file, exp->X_add_symbol); + fprintf (file, ">"); + maybe_print_addnum: + if (exp->X_add_number) + fprintf (file, "\n%*s%lx", indent_level * 4, "", + (long) exp->X_add_number); + indent_level--; + break; + case O_register: + fprintf (file, "register #%d", (int) exp->X_add_number); + break; + case O_big: + fprintf (file, "big"); + break; + case O_uminus: + fprintf (file, "uminus -<"); + indent_level++; + print_symbol_value_1 (file, exp->X_add_symbol); + fprintf (file, ">"); + goto maybe_print_addnum; + case O_bit_not: + fprintf (file, "bit_not"); + break; + case O_multiply: + print_binary (file, "multiply", exp); + break; + case O_divide: + print_binary (file, "divide", exp); + break; + case O_modulus: + print_binary (file, "modulus", exp); + break; + case O_left_shift: + print_binary (file, "lshift", exp); + break; + case O_right_shift: + print_binary (file, "rshift", exp); + break; + case O_bit_inclusive_or: + print_binary (file, "bit_ior", exp); + break; + case O_bit_exclusive_or: + print_binary (file, "bit_xor", exp); + break; + case O_bit_and: + print_binary (file, "bit_and", exp); + break; + case O_eq: + print_binary (file, "eq", exp); + break; + case O_ne: + print_binary (file, "ne", exp); + break; + case O_lt: + print_binary (file, "lt", exp); + break; + case O_le: + print_binary (file, "le", exp); + break; + case O_ge: + print_binary (file, "ge", exp); + break; + case O_gt: + print_binary (file, "gt", exp); + break; + case O_logical_and: + print_binary (file, "logical_and", exp); + break; + case O_logical_or: + print_binary (file, "logical_or", exp); + break; + case O_add: + indent_level++; + fprintf (file, "add\n%*s<", indent_level * 4, ""); + print_symbol_value_1 (file, exp->X_add_symbol); + fprintf (file, ">\n%*s<", indent_level * 4, ""); + print_symbol_value_1 (file, exp->X_op_symbol); + fprintf (file, ">"); + goto maybe_print_addnum; + case O_subtract: + indent_level++; + fprintf (file, "subtract\n%*s<", indent_level * 4, ""); + print_symbol_value_1 (file, exp->X_add_symbol); + fprintf (file, ">\n%*s<", indent_level * 4, ""); + print_symbol_value_1 (file, exp->X_op_symbol); + fprintf (file, ">"); + goto maybe_print_addnum; + default: + fprintf (file, "{unknown opcode %d}", (int) exp->X_op); + break; + } + fflush (stdout); +} + +void +print_expr (expressionS *exp) +{ + print_expr_1 (stderr, exp); + fprintf (stderr, "\n"); +} + +void +symbol_print_statistics (FILE *file) +{ + hash_print_statistics (file, "symbol table", sy_hash); +#ifdef BFD_ASSEMBLER + hash_print_statistics (file, "mini local symbol table", local_hash); + fprintf (file, "%lu mini local symbols created, %lu converted\n", + local_symbol_count, local_symbol_conversion_count); +#endif +} |
