/* symbols.c -symbol table-
Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2001, 2002, 2003, 2004, 2005
+ 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
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)
+ the Free Software Foundation; either version 3, or (at your option)
any later version.
GAS is distributed in the hope that it will be useful,
#define LOCAL_LABEL_CHAR '\002'
struct obstack notes;
-#ifdef USE_UNIQUE
+#ifdef TE_PE
/* The name of an external symbol which is
used to make weak PE symbol names unique. */
const char * an_external_name;
name_length = strlen (name) + 1; /* +1 for \0. */
obstack_grow (¬es, name, name_length);
- ret = obstack_finish (¬es);
+ ret = (char *) obstack_finish (¬es);
#ifdef tc_canonicalize_symbol_name
ret = tc_canonicalize_symbol_name (ret);
symbolP->bsym = bfd_make_empty_symbol (stdoutput);
if (symbolP->bsym == NULL)
- as_perror ("%s", "bfd_make_empty_symbol");
- symbolP->bsym->udata.p = (PTR) symbolP;
+ as_fatal ("bfd_make_empty_symbol: %s", bfd_errmsg (bfd_get_error ()));
S_SET_NAME (symbolP, preserved_copy_of_name);
S_SET_SEGMENT (symbolP, segment);
/* Create a local symbol and insert it into the local hash table. */
static struct local_symbol *
-local_symbol_make (const char *name, segT section, valueT value, fragS *frag)
+local_symbol_make (const char *name, segT section, valueT val, fragS *frag)
{
char *name_copy;
struct local_symbol *ret;
ret->lsy_name = name_copy;
ret->lsy_section = section;
local_symbol_set_frag (ret, frag);
- ret->lsy_value = value;
+ ret->lsy_value = val;
- hash_jam (local_hash, name_copy, (PTR) ret);
+ hash_jam (local_hash, name_copy, (void *) ret);
return ret;
}
{
symbolS *ret;
- assert (locsym->lsy_marker == NULL);
+ gas_assert (locsym->lsy_marker == NULL);
if (local_symbol_converted_p (locsym))
return local_symbol_get_real_symbol (locsym);
return ret;
}
\f
+static void
+define_sym_at_dot (symbolS *symbolP)
+{
+ 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);
+}
+
/* We have just seen "<name>:".
Creates a struct symbol unless it already exists.
|| S_IS_COMMON (symbolP)
|| S_IS_VOLATILE (symbolP))
{
- if (S_IS_VOLATILE (symbolP)
- /* This could be avoided when the symbol wasn't used so far, but
- the comment in struc-symbol.h says this flag isn't reliable. */
- && (1 || !symbol_used_p (symbolP)))
+ if (S_IS_VOLATILE (symbolP))
{
symbolP = symbol_clone (symbolP, 1);
S_SET_VALUE (symbolP, 0);
}
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);
+ define_sym_at_dot (symbolP);
#ifdef N_UNDF
know (N_UNDF == 0);
#endif /* if we have one, it better be zero. */
{
/* 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. */
+ define_sym_at_dot (symbolP);
}
}
else
{
as_bad (_("symbol `%s' is already defined"), sym_name);
symbolP = symbol_clone (symbolP, 0);
+ define_sym_at_dot (symbolP);
}
}
if (LOCAL_SYMBOL_CHECK (symbolP))
{
error_string = hash_jam (local_hash, S_GET_NAME (symbolP),
- (PTR) symbolP);
+ (void *) 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)))
+ if ((error_string = hash_jam (sy_hash, S_GET_NAME (symbolP), (void *) symbolP)))
{
as_fatal (_("inserting \"%s\" into symbol table failed: %s"),
S_GET_NAME (symbolP), error_string);
orgsymP = local_symbol_convert ((struct local_symbol *) orgsymP);
bsymorg = orgsymP->bsym;
- know (S_IS_DEFINED (orgsymP));
-
- newsymP = obstack_alloc (¬es, sizeof (*newsymP));
+ newsymP = (symbolS *) obstack_alloc (¬es, sizeof (*newsymP));
*newsymP = *orgsymP;
bsymnew = bfd_make_empty_symbol (bfd_asymbol_bfd (bsymorg));
if (bsymnew == NULL)
- as_perror ("%s", "bfd_make_empty_symbol");
+ as_fatal ("bfd_make_empty_symbol: %s", bfd_errmsg (bfd_get_error ()));
newsymP->bsym = bsymnew;
bsymnew->name = bsymorg->name;
bsymnew->flags = bsymorg->flags;
bsymnew->section = bsymorg->section;
- bsymnew->udata.p = (PTR) newsymP;
bfd_copy_private_symbol_data (bfd_asymbol_bfd (bsymorg), bsymorg,
bfd_asymbol_bfd (bsymnew), bsymnew);
symbol_lastP = newsymP;
else if (orgsymP->sy_next)
orgsymP->sy_next->sy_previous = newsymP;
- orgsymP->sy_next = NULL;
+
+ /* Symbols that won't be output can't be external. */
+ S_CLEAR_EXTERNAL (orgsymP);
+ orgsymP->sy_previous = orgsymP->sy_next = orgsymP;
debug_verify_symchain (symbol_rootP, symbol_lastP);
symbol_table_insert (newsymP);
}
+ else
+ {
+ /* Symbols that won't be output can't be external. */
+ S_CLEAR_EXTERNAL (newsymP);
+ newsymP->sy_previous = newsymP->sy_next = newsymP;
+ }
return newsymP;
}
for (; symbol_next (symbolP) != NULL; symbolP = symbol_next (symbolP))
{
- assert (symbolP->bsym != NULL);
- assert (symbolP->sy_next->sy_previous == symbolP);
+ gas_assert (symbolP->bsym != NULL);
+ gas_assert (symbolP->sy_next->sy_previous == symbolP);
}
- assert (lastP == symbolP);
+ gas_assert (lastP == symbolP);
+}
+
+#ifdef OBJ_COMPLEX_RELC
+
+static int
+use_complex_relocs_for (symbolS * symp)
+{
+ switch (symp->sy_value.X_op)
+ {
+ case O_constant:
+ return 0;
+
+ case O_symbol:
+ case O_symbol_rva:
+ case O_uminus:
+ case O_bit_not:
+ case O_logical_not:
+ if ( (S_IS_COMMON (symp->sy_value.X_add_symbol)
+ || S_IS_LOCAL (symp->sy_value.X_add_symbol))
+ &&
+ (S_IS_DEFINED (symp->sy_value.X_add_symbol)
+ && S_GET_SEGMENT (symp->sy_value.X_add_symbol) != expr_section))
+ return 0;
+ 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:
+
+ if ( (S_IS_COMMON (symp->sy_value.X_add_symbol)
+ || S_IS_LOCAL (symp->sy_value.X_add_symbol))
+ &&
+ (S_IS_COMMON (symp->sy_value.X_op_symbol)
+ || S_IS_LOCAL (symp->sy_value.X_op_symbol))
+
+ && S_IS_DEFINED (symp->sy_value.X_add_symbol)
+ && S_IS_DEFINED (symp->sy_value.X_op_symbol)
+ && S_GET_SEGMENT (symp->sy_value.X_add_symbol) != expr_section
+ && S_GET_SEGMENT (symp->sy_value.X_op_symbol) != expr_section)
+ return 0;
+ break;
+
+ default:
+ break;
+ }
+ return 1;
}
+#endif
static void
report_op_error (symbolS *symp, symbolS *left, symbolS *right)
&& 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));
+ as_bad (_("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));
+ as_bad (_("invalid section for operation on `%s' setting `%s'"),
+ S_GET_NAME (left), S_GET_NAME (symp));
}
}
}
final_val = 0;
resolved = 1;
}
+#ifdef OBJ_COMPLEX_RELC
+ else if (final_seg == expr_section
+ && use_complex_relocs_for (symp))
+ {
+ symbolS * relc_symbol = NULL;
+ char * relc_symbol_name = NULL;
+
+ relc_symbol_name = symbol_relc_make_expr (& symp->sy_value);
+
+ /* For debugging, print out conversion input & output. */
+#ifdef DEBUG_SYMS
+ print_expr (& symp->sy_value);
+ if (relc_symbol_name)
+ fprintf (stderr, "-> relc symbol: %s\n", relc_symbol_name);
+#endif
+
+ if (relc_symbol_name != NULL)
+ relc_symbol = symbol_new (relc_symbol_name, undefined_section,
+ 0, & zero_address_frag);
+
+ if (relc_symbol == NULL)
+ {
+ as_bad (_("cannot convert expression symbol %s to complex relocation"),
+ S_GET_NAME (symp));
+ resolved = 0;
+ }
+ else
+ {
+ symbol_table_insert (relc_symbol);
+
+ /* S_CLEAR_EXTERNAL (relc_symbol); */
+ if (symp->bsym->flags & BSF_SRELC)
+ relc_symbol->bsym->flags |= BSF_SRELC;
+ else
+ relc_symbol->bsym->flags |= BSF_RELC;
+ /* symp->bsym->flags |= BSF_RELC; */
+ copy_symbol_attributes (symp, relc_symbol);
+ symp->sy_value.X_op = O_symbol;
+ symp->sy_value.X_add_symbol = relc_symbol;
+ symp->sy_value.X_add_number = 0;
+ resolved = 1;
+ }
+
+ final_seg = undefined_section;
+ goto exit_dont_set_value;
+ }
+#endif
else
{
symbolS *add_symbol, *op_symbol;
final_val += symp->sy_frag->fr_address / OCTETS_PER_BYTE;
if (final_seg == expr_section)
final_seg = absolute_section;
+ /* Fall through. */
+
+ case O_register:
resolved = 1;
break;
do_symbol:
if (S_IS_WEAKREFR (symp))
{
- assert (final_val == 0);
+ gas_assert (final_val == 0);
if (S_IS_WEAKREFR (add_symbol))
{
- assert (add_symbol->sy_value.X_op == O_symbol
+ gas_assert (add_symbol->sy_value.X_op == O_symbol
&& add_symbol->sy_value.X_add_number == 0);
add_symbol = add_symbol->sy_value.X_add_symbol;
- assert (! S_IS_WEAKREFR (add_symbol));
+ gas_assert (! S_IS_WEAKREFR (add_symbol));
symp->sy_value.X_add_symbol = add_symbol;
}
}
symp->sy_resolving = 0;
goto exit_dont_set_value;
}
- else if (finalize_syms && final_seg == expr_section
- && seg_left != expr_section)
+ else if (finalize_syms
+ && ((final_seg == expr_section && seg_left != expr_section)
+ || symbol_shadow_p (symp)))
{
/* If the symbol is an expression symbol, do similarly
as for undefined and common syms above. Handles
&& 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
return final_val;
}
-static void resolve_local_symbol (const char *, PTR);
+static void resolve_local_symbol (const char *, void *);
/* A static function passed to hash_traverse. */
static void
-resolve_local_symbol (const char *key ATTRIBUTE_UNUSED, PTR value)
+resolve_local_symbol (const char *key ATTRIBUTE_UNUSED, void *value)
{
if (value != NULL)
- resolve_symbol_value (value);
+ resolve_symbol_value ((symbolS *) value);
}
/* Resolve all local symbols. */
}
else
{
- expressionS expr = symbolP->sy_value;
+ expressionS exp = symbolP->sy_value;
- if (!symbolP->sy_resolved && expr.X_op != O_illegal)
+ if (!symbolP->sy_resolved && exp.X_op != O_illegal)
{
int resolved;
if (symbolP->sy_resolving)
return 0;
symbolP->sy_resolving = 1;
- resolved = resolve_expression (&expr);
+ resolved = resolve_expression (&exp);
symbolP->sy_resolving = 0;
if (!resolved)
return 0;
- switch (expr.X_op)
+ switch (exp.X_op)
{
case O_constant:
case O_register:
/* Fall thru. */
case O_symbol:
case O_symbol_rva:
- symbolP = expr.X_add_symbol;
+ symbolP = exp.X_add_symbol;
break;
default:
return 0;
}
*symbolPP = symbolP;
- *valueP = expr.X_add_number;
+ *valueP = exp.X_add_number;
*segP = symbolP->bsym->section;
*fragPP = symbolP->sy_frag;
if (*segP == expr_section)
- switch (expr.X_op)
+ switch (exp.X_op)
{
case O_constant: *segP = absolute_section; break;
case O_register: *segP = reg_section; break;
{
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_defines = (char *) xmalloc (DOLLAR_LABEL_BUMP_BY);
dollar_label_max = DOLLAR_LABEL_BUMP_BY;
dollar_label_count = 0;
}
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);
+ dollar_label_defines = (char *) xrealloc (dollar_label_defines, dollar_label_max);
} /* if we needed to grow */
dollar_labels[dollar_label_count] = label;
int instance_number;
char *type;
const char *message_format;
- int index = 0;
+ int lindex = 0;
#ifdef LOCAL_LABEL_PREFIX
- if (s[index] == LOCAL_LABEL_PREFIX)
- ++index;
+ if (s[lindex] == LOCAL_LABEL_PREFIX)
+ ++lindex;
#endif
- if (s[index] != 'L')
+ if (s[lindex] != 'L')
return s;
- for (label_number = 0, p = s + index + 1; ISDIGIT (*p); ++p)
+ for (label_number = 0, p = s + lindex + 1; ISDIGIT (*p); ++p)
label_number = (10 * label_number) + *p - '0';
if (*p == DOLLAR_LABEL_CHAR)
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);
+ symbol_decode = (char *) obstack_alloc (¬es, strlen (message_format) + 30);
sprintf (symbol_decode, message_format, label_number, instance_number, type);
return symbol_decode;
/* In an expression, transfer the settings of these flags.
The user can override later, of course. */
-#define COPIED_SYMFLAGS (BSF_FUNCTION | BSF_OBJECT)
+#define COPIED_SYMFLAGS (BSF_FUNCTION | BSF_OBJECT \
+ | BSF_GNU_INDIRECT_FUNCTION)
dest->bsym->flags |= src->bsym->flags & COPIED_SYMFLAGS;
#ifdef OBJ_COPY_SYMBOL_ATTRIBUTES
OBJ_COPY_SYMBOL_ATTRIBUTES (dest, src);
#endif
+
+#ifdef TC_COPY_SYMBOL_ATTRIBUTES
+ TC_COPY_SYMBOL_ATTRIBUTES (dest, src);
+#endif
}
int
return ((strict
&& ((s->bsym->flags & BSF_WEAK) != 0
+ || (s->bsym->flags & BSF_GNU_INDIRECT_FUNCTION) != 0
|| (EXTERN_FORCE_RELOC
&& (s->bsym->flags & BSF_GLOBAL) != 0)))
|| s->bsym->section == undefined_section
_("section symbols are already global"));
return;
}
+#ifndef TC_GLOBAL_REGISTER_SYMBOL_OK
+ if (S_GET_SEGMENT (s) == reg_section)
+ {
+ as_bad ("can't make register symbol `%s' global",
+ S_GET_NAME (s));
+ return;
+ }
+#endif
s->bsym->flags |= BSF_GLOBAL;
s->bsym->flags &= ~(BSF_LOCAL | BSF_WEAK);
-#ifdef USE_UNIQUE
+#ifdef TE_PE
if (! an_external_name && S_GET_NAME(s)[0] != '.')
an_external_name = S_GET_NAME (s);
#endif
S_CLEAR_WEAKREFR (s);
}
+/* Return whether 2 symbols are the same. */
+
+int
+symbol_same_p (symbolS *s1, symbolS *s2)
+{
+ if (s1->bsym == NULL
+ && local_symbol_converted_p ((struct local_symbol *) s1))
+ s1 = local_symbol_get_real_symbol ((struct local_symbol *) s1);
+ if (s2->bsym == NULL
+ && local_symbol_converted_p ((struct local_symbol *) s2))
+ s2 = local_symbol_get_real_symbol ((struct local_symbol *) s2);
+ return s1 == s2;
+}
+
/* Return a pointer to the X_add_number component of a symbol. */
offsetT *
return s->sy_value.X_op == O_constant;
}
+/* Return whether a symbol was cloned and thus removed from the global
+ symbol list. */
+
+int
+symbol_shadow_p (symbolS *s)
+{
+ if (LOCAL_SYMBOL_CHECK (s))
+ return 0;
+ return s->sy_next == s;
+}
+
/* Return the BFD symbol for a symbol. */
asymbol *
const char *name = S_GET_NAME (sym);
if (!name || !name[0])
name = "(unnamed)";
- fprintf (file, "sym %lx %s", (unsigned long) sym, name);
+ fprintf (file, "sym ");
+ fprintf_vma (file, (bfd_vma) ((bfd_hostptr_t) sym));
+ fprintf (file, " %s", name);
if (LOCAL_SYMBOL_CHECK (sym))
{
struct local_symbol *locsym = (struct local_symbol *) sym;
- if (local_symbol_get_frag (locsym) != &zero_address_frag
+
+ 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));
+ {
+ fprintf (file, " frag ");
+ fprintf_vma (file, (bfd_vma) ((bfd_hostptr_t) local_symbol_get_frag (locsym)));
+ }
if (local_symbol_resolved_p (locsym))
fprintf (file, " resolved");
fprintf (file, " local");
else
{
if (sym->sy_frag != &zero_address_frag)
- fprintf (file, " frag %lx", (long) sym->sy_frag);
+ {
+ fprintf (file, " frag ");
+ fprintf_vma (file, (bfd_vma) ((bfd_hostptr_t) sym->sy_frag));
+ }
if (sym->written)
fprintf (file, " written");
if (sym->sy_resolved)
if (s != undefined_section
&& s != expr_section)
- fprintf (file, " %lx", (long) S_GET_VALUE (sym));
+ fprintf (file, " %lx", (unsigned long) S_GET_VALUE (sym));
}
else if (indent_level < max_indent_level
&& S_GET_SEGMENT (sym) != undefined_section)
fprintf (file, "\n%*s<", indent_level * 4, "");
if (LOCAL_SYMBOL_CHECK (sym))
fprintf (file, "constant %lx",
- (long) ((struct local_symbol *) sym)->lsy_value);
+ (unsigned long) ((struct local_symbol *) sym)->lsy_value);
else
print_expr_1 (file, &sym->sy_value);
fprintf (file, ">");
void
print_expr_1 (FILE *file, expressionS *exp)
{
- fprintf (file, "expr %lx ", (long) exp);
+ fprintf (file, "expr ");
+ fprintf_vma (file, (bfd_vma) ((bfd_hostptr_t) exp));
+ fprintf (file, " ");
switch (exp->X_op)
{
case O_illegal:
fprintf (file, "absent");
break;
case O_constant:
- fprintf (file, "constant %lx", (long) exp->X_add_number);
+ fprintf (file, "constant %lx", (unsigned long) exp->X_add_number);
break;
case O_symbol:
indent_level++;
maybe_print_addnum:
if (exp->X_add_number)
fprintf (file, "\n%*s%lx", indent_level * 4, "",
- (long) exp->X_add_number);
+ (unsigned long) exp->X_add_number);
indent_level--;
break;
case O_register:
fprintf (file, "%lu mini local symbols created, %lu converted\n",
local_symbol_count, local_symbol_conversion_count);
}
+
+#ifdef OBJ_COMPLEX_RELC
+
+/* Convert given symbol to a new complex-relocation symbol name. This
+ may be a recursive function, since it might be called for non-leaf
+ nodes (plain symbols) in the expression tree. The caller owns the
+ returning string, so should free it eventually. Errors are
+ indicated via as_bad and a NULL return value. The given symbol
+ is marked with sy_used_in_reloc. */
+
+char *
+symbol_relc_make_sym (symbolS * sym)
+{
+ char * terminal = NULL;
+ const char * sname;
+ char typetag;
+ int sname_len;
+
+ gas_assert (sym != NULL);
+
+ /* Recurse to symbol_relc_make_expr if this symbol
+ is defined as an expression or a plain value. */
+ if ( S_GET_SEGMENT (sym) == expr_section
+ || S_GET_SEGMENT (sym) == absolute_section)
+ return symbol_relc_make_expr (& sym->sy_value);
+
+ /* This may be a "fake symbol" L0\001, referring to ".".
+ Write out a special null symbol to refer to this position. */
+ if (! strcmp (S_GET_NAME (sym), FAKE_LABEL_NAME))
+ return xstrdup (".");
+
+ /* We hope this is a plain leaf symbol. Construct the encoding
+ as {S,s}II...:CCCCCCC....
+ where 'S'/'s' means section symbol / plain symbol
+ III is decimal for the symbol name length
+ CCC is the symbol name itself. */
+ symbol_mark_used_in_reloc (sym);
+
+ sname = S_GET_NAME (sym);
+ sname_len = strlen (sname);
+ typetag = symbol_section_p (sym) ? 'S' : 's';
+
+ terminal = xmalloc (1 /* S or s */
+ + 8 /* sname_len in decimal */
+ + 1 /* _ spacer */
+ + sname_len /* name itself */
+ + 1 /* \0 */ );
+
+ sprintf (terminal, "%c%d:%s", typetag, sname_len, sname);
+ return terminal;
+}
+
+/* Convert given value to a new complex-relocation symbol name. This
+ is a non-recursive function, since it is be called for leaf nodes
+ (plain values) in the expression tree. The caller owns the
+ returning string, so should free() it eventually. No errors. */
+
+char *
+symbol_relc_make_value (offsetT val)
+{
+ char * terminal = xmalloc (28); /* Enough for long long. */
+
+ terminal[0] = '#';
+ bfd_sprintf_vma (stdoutput, terminal + 1, val);
+ return terminal;
+}
+
+/* Convert given expression to a new complex-relocation symbol name.
+ This is a recursive function, since it traverses the entire given
+ expression tree. The caller owns the returning string, so should
+ free() it eventually. Errors are indicated via as_bad() and a NULL
+ return value. */
+
+char *
+symbol_relc_make_expr (expressionS * exp)
+{
+ char * opstr = NULL; /* Operator prefix string. */
+ int arity = 0; /* Arity of this operator. */
+ char * operands[3]; /* Up to three operands. */
+ char * concat_string = NULL;
+
+ operands[0] = operands[1] = operands[2] = NULL;
+
+ gas_assert (exp != NULL);
+
+ /* Match known operators -> fill in opstr, arity, operands[] and fall
+ through to construct subexpression fragments; may instead return
+ string directly for leaf nodes. */
+
+ /* See expr.h for the meaning of all these enums. Many operators
+ have an unnatural arity (X_add_number implicitly added). The
+ conversion logic expands them to explicit "+" subexpressions. */
+
+ switch (exp->X_op)
+ {
+ default:
+ as_bad ("Unknown expression operator (enum %d)", exp->X_op);
+ break;
+
+ /* Leaf nodes. */
+ case O_constant:
+ return symbol_relc_make_value (exp->X_add_number);
+
+ case O_symbol:
+ if (exp->X_add_number)
+ {
+ arity = 2;
+ opstr = "+";
+ operands[0] = symbol_relc_make_sym (exp->X_add_symbol);
+ operands[1] = symbol_relc_make_value (exp->X_add_number);
+ break;
+ }
+ else
+ return symbol_relc_make_sym (exp->X_add_symbol);
+
+ /* Helper macros for nesting nodes. */
+
+#define HANDLE_XADD_OPT1(str_) \
+ if (exp->X_add_number) \
+ { \
+ arity = 2; \
+ opstr = "+:" str_; \
+ operands[0] = symbol_relc_make_sym (exp->X_add_symbol); \
+ operands[1] = symbol_relc_make_value (exp->X_add_number); \
+ break; \
+ } \
+ else \
+ { \
+ arity = 1; \
+ opstr = str_; \
+ operands[0] = symbol_relc_make_sym (exp->X_add_symbol); \
+ } \
+ break
+
+#define HANDLE_XADD_OPT2(str_) \
+ if (exp->X_add_number) \
+ { \
+ arity = 3; \
+ opstr = "+:" str_; \
+ operands[0] = symbol_relc_make_sym (exp->X_add_symbol); \
+ operands[1] = symbol_relc_make_sym (exp->X_op_symbol); \
+ operands[2] = symbol_relc_make_value (exp->X_add_number); \
+ } \
+ else \
+ { \
+ arity = 2; \
+ opstr = str_; \
+ operands[0] = symbol_relc_make_sym (exp->X_add_symbol); \
+ operands[1] = symbol_relc_make_sym (exp->X_op_symbol); \
+ } \
+ break
+
+ /* Nesting nodes. */
+
+ case O_uminus: HANDLE_XADD_OPT1 ("0-");
+ case O_bit_not: HANDLE_XADD_OPT1 ("~");
+ case O_logical_not: HANDLE_XADD_OPT1 ("!");
+ case O_multiply: HANDLE_XADD_OPT2 ("*");
+ case O_divide: HANDLE_XADD_OPT2 ("/");
+ case O_modulus: HANDLE_XADD_OPT2 ("%");
+ case O_left_shift: HANDLE_XADD_OPT2 ("<<");
+ case O_right_shift: HANDLE_XADD_OPT2 (">>");
+ case O_bit_inclusive_or: HANDLE_XADD_OPT2 ("|");
+ case O_bit_exclusive_or: HANDLE_XADD_OPT2 ("^");
+ case O_bit_and: HANDLE_XADD_OPT2 ("&");
+ case O_add: HANDLE_XADD_OPT2 ("+");
+ case O_subtract: HANDLE_XADD_OPT2 ("-");
+ case O_eq: HANDLE_XADD_OPT2 ("==");
+ case O_ne: HANDLE_XADD_OPT2 ("!=");
+ case O_lt: HANDLE_XADD_OPT2 ("<");
+ case O_le: HANDLE_XADD_OPT2 ("<=");
+ case O_ge: HANDLE_XADD_OPT2 (">=");
+ case O_gt: HANDLE_XADD_OPT2 (">");
+ case O_logical_and: HANDLE_XADD_OPT2 ("&&");
+ case O_logical_or: HANDLE_XADD_OPT2 ("||");
+ }
+
+ /* Validate & reject early. */
+ if (arity >= 1 && ((operands[0] == NULL) || (strlen (operands[0]) == 0)))
+ opstr = NULL;
+ if (arity >= 2 && ((operands[1] == NULL) || (strlen (operands[1]) == 0)))
+ opstr = NULL;
+ if (arity >= 3 && ((operands[2] == NULL) || (strlen (operands[2]) == 0)))
+ opstr = NULL;
+
+ if (opstr == NULL)
+ concat_string = NULL;
+ else
+ {
+ /* Allocate new string; include inter-operand padding gaps etc. */
+ concat_string = xmalloc (strlen (opstr)
+ + 1
+ + (arity >= 1 ? (strlen (operands[0]) + 1 ) : 0)
+ + (arity >= 2 ? (strlen (operands[1]) + 1 ) : 0)
+ + (arity >= 3 ? (strlen (operands[2]) + 0 ) : 0)
+ + 1);
+ gas_assert (concat_string != NULL);
+
+ /* Format the thing. */
+ sprintf (concat_string,
+ (arity == 0 ? "%s" :
+ arity == 1 ? "%s:%s" :
+ arity == 2 ? "%s:%s:%s" :
+ /* arity == 3 */ "%s:%s:%s:%s"),
+ opstr, operands[0], operands[1], operands[2]);
+ }
+
+ /* Free operand strings (not opstr). */
+ if (arity >= 1) xfree (operands[0]);
+ if (arity >= 2) xfree (operands[1]);
+ if (arity >= 3) xfree (operands[2]);
+
+ return concat_string;
+}
+
+#endif
projects / deliverable / binutils-gdb.git / blobdiff