/* Read coff symbol tables and convert to internal format, for GDB.
Copyright (C) 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
- 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007
+ 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009
Free Software Foundation, Inc.
Contributed by David D. Johnson, Brown University (ddj@cs.brown.edu).
This program 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 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "symtab.h"
extern void stabsread_clear_cache (void);
-static struct type *coff_read_struct_type (int, int, int);
+static struct type *coff_read_struct_type (int, int, int,
+ struct objfile *);
static struct type *decode_base_type (struct coff_symbol *,
- unsigned int, union internal_auxent *);
+ unsigned int, union internal_auxent *,
+ struct objfile *);
static struct type *decode_type (struct coff_symbol *, unsigned int,
- union internal_auxent *);
+ union internal_auxent *,
+ struct objfile *);
static struct type *decode_function_type (struct coff_symbol *,
unsigned int,
- union internal_auxent *);
+ union internal_auxent *,
+ struct objfile *);
-static struct type *coff_read_enum_type (int, int, int);
+static struct type *coff_read_enum_type (int, int, int,
+ struct objfile *);
static struct symbol *process_coff_symbol (struct coff_symbol *,
union internal_auxent *,
csi = (struct coff_symfile_info *) csip;
name = bfd_get_section_name (abfd, sectp);
- if (DEPRECATED_STREQ (name, ".text"))
+ if (strcmp (name, ".text") == 0)
{
csi->textaddr = bfd_section_vma (abfd, sectp);
csi->textsize += bfd_section_size (abfd, sectp);
{
csi->textsize += bfd_section_size (abfd, sectp);
}
- else if (DEPRECATED_STREQ (name, ".stabstr"))
+ else if (strcmp (name, ".stabstr") == 0)
{
csi->stabstrsect = sectp;
}
bfd_section = cs_to_bfd_section (cs, objfile);
return prim_record_minimal_symbol_and_info (cs->c_name, address, type,
- NULL, section, bfd_section, objfile);
+ section, bfd_section, objfile);
}
\f
/* coff_symfile_init ()
/* Let stabs reader clean up */
stabsread_clear_cache ();
+
+ dwarf2_free_objfile (objfile);
}
\f
coff_symtab_read (long symtab_offset, unsigned int nsyms,
struct objfile *objfile)
{
+ struct gdbarch *gdbarch = get_objfile_arch (objfile);
struct context_stack *new;
struct coff_symbol coff_symbol;
struct coff_symbol *cs = &coff_symbol;
case C_THUMBSTATFUNC:
if (cs->c_name[0] == '.')
{
- if (DEPRECATED_STREQ (cs->c_name, ".text"))
+ if (strcmp (cs->c_name, ".text") == 0)
{
/* FIXME: don't wire in ".text" as section name
or symbol name! */
cs->c_sclass == C_EXT || cs->c_sclass == C_THUMBEXTFUNC
|| cs->c_sclass == C_THUMBEXT ?
mst_text : mst_file_text;
- tmpaddr = gdbarch_smash_text_address
- (current_gdbarch, tmpaddr);
+ tmpaddr = gdbarch_smash_text_address (gdbarch, tmpaddr);
}
else if (bfd_section->flags & SEC_ALLOC
&& bfd_section->flags & SEC_LOAD)
msym = record_minimal_symbol (cs, tmpaddr, ms_type, sec, objfile);
if (msym)
- gdbarch_coff_make_msymbol_special
- (current_gdbarch, cs->c_sclass, msym);
+ gdbarch_coff_make_msymbol_special (gdbarch, cs->c_sclass, msym);
if (SDB_TYPE (cs->c_type))
{
break;
case C_FCN:
- if (DEPRECATED_STREQ (cs->c_name, ".bf"))
+ if (strcmp (cs->c_name, ".bf") == 0)
{
within_function = 1;
new->name =
process_coff_symbol (&fcn_cs_saved, &fcn_aux_saved, objfile);
}
- else if (DEPRECATED_STREQ (cs->c_name, ".ef"))
+ else if (strcmp (cs->c_name, ".ef") == 0)
{
if (!within_function)
error (_("Bad coff function information."));
finish_block (new->name, &local_symbols, new->old_blocks,
new->start_addr,
-#if defined (FUNCTION_EPILOGUE_SIZE)
- /* This macro should be defined only on
- machines where the
- fcn_aux_saved.x_sym.x_misc.x_fsize
- field is always zero.
- So use the .bf record information that
- points to the epilogue and add the size
- of the epilogue. */
- cs->c_value
- + FUNCTION_EPILOGUE_SIZE
- + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)),
-#else
fcn_cs_saved.c_value
+ fcn_aux_saved.x_sym.x_misc.x_fsize
+ ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)),
-#endif
objfile
);
within_function = 0;
break;
case C_BLOCK:
- if (DEPRECATED_STREQ (cs->c_name, ".bb"))
+ if (strcmp (cs->c_name, ".bb") == 0)
{
tmpaddr = cs->c_value;
tmpaddr += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
push_context (++depth, tmpaddr);
}
- else if (DEPRECATED_STREQ (cs->c_name, ".eb"))
+ else if (strcmp (cs->c_name, ".eb") == 0)
{
if (context_stack_depth <= 0)
{ /* We attempted to pop an empty context stack */
if ((nsyms == 0) && (pe_file))
{
- /* We've got no debugging symbols, but it's is a portable
+ /* We've got no debugging symbols, but it's a portable
executable, so try to read the export table */
read_pe_exported_syms (objfile);
}
union internal_auxent *aux)
{
int i;
+ bfd_size_type bytes;
cs->c_symnum = symnum;
- bfd_bread (temp_sym, local_symesz, nlist_bfd_global);
+ bytes = bfd_bread (temp_sym, local_symesz, nlist_bfd_global);
+ if (bytes != local_symesz)
+ error ("%s: error reading symbols", current_objfile->name);
bfd_coff_swap_sym_in (symfile_bfd, temp_sym, (char *) sym);
cs->c_naux = sym->n_numaux & 0xff;
if (cs->c_naux >= 1)
{
- bfd_bread (temp_aux, local_auxesz, nlist_bfd_global);
+ bytes = bfd_bread (temp_aux, local_auxesz, nlist_bfd_global);
+ if (bytes != local_auxesz)
+ error ("%s: error reading symbols", current_objfile->name);
bfd_coff_swap_aux_in (symfile_bfd, temp_aux, sym->n_type, sym->n_sclass,
0, cs->c_naux, (char *) aux);
/* If more than one aux entry, read past it (only the first aux
is important). */
for (i = 1; i < cs->c_naux; i++)
- bfd_bread (temp_aux, local_auxesz, nlist_bfd_global);
+ {
+ bytes = bfd_bread (temp_aux, local_auxesz, nlist_bfd_global);
+ if (bytes != local_auxesz)
+ error ("%s: error reading symbols", current_objfile->name);
+ }
}
cs->c_name = getsymname (sym);
cs->c_value = sym->n_value;
TYPE_CODE (SYMBOL_TYPE (real_sym)) == TYPE_CODE_PTR &&
TYPE_LENGTH (TYPE_TARGET_TYPE (SYMBOL_TYPE (real_sym))) != 0)
{
- char *name = DEPRECATED_SYMBOL_NAME (real_sym);
+ char *name = SYMBOL_LINKAGE_NAME (real_sym);
int hash = hashname (name);
struct symbol *sym, *prev;
prev = 0;
for (sym = opaque_type_chain[hash]; sym;)
{
- if (name[0] == DEPRECATED_SYMBOL_NAME (sym)[0] &&
- strcmp (name + 1, DEPRECATED_SYMBOL_NAME (sym) + 1) == 0)
+ if (name[0] == SYMBOL_LINKAGE_NAME (sym)[0] &&
+ strcmp (name + 1, SYMBOL_LINKAGE_NAME (sym) + 1) == 0)
{
if (prev)
{
{
SYMBOL_VALUE (sym) += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
SYMBOL_TYPE (sym) =
- lookup_function_type (decode_function_type (cs, cs->c_type, aux));
+ lookup_function_type (decode_function_type (cs, cs->c_type, aux, objfile));
SYMBOL_CLASS (sym) = LOC_BLOCK;
if (cs->c_sclass == C_STAT || cs->c_sclass == C_THUMBSTAT
}
else
{
- SYMBOL_TYPE (sym) = decode_type (cs, cs->c_type, aux);
+ SYMBOL_TYPE (sym) = decode_type (cs, cs->c_type, aux, objfile);
switch (cs->c_sclass)
{
case C_NULL:
case C_ARG:
SYMBOL_CLASS (sym) = LOC_ARG;
+ SYMBOL_IS_ARGUMENT (sym) = 1;
add_symbol_to_list (sym, &local_symbols);
-#if !defined (BELIEVE_PCC_PROMOTION)
- if (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG)
- {
- /* If PCC says a parameter is a short or a char,
- aligned on an int boundary, realign it to the
- "little end" of the int. */
- struct type *temptype;
- temptype = lookup_fundamental_type (current_objfile,
- FT_INTEGER);
- if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (temptype)
- && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT
- && 0 == SYMBOL_VALUE (sym) % TYPE_LENGTH (temptype))
- {
- SYMBOL_VALUE (sym) +=
- TYPE_LENGTH (temptype)
- - TYPE_LENGTH (SYMBOL_TYPE (sym));
- }
- }
-#endif
break;
case C_REGPARM:
- SYMBOL_CLASS (sym) = LOC_REGPARM;
+ SYMBOL_CLASS (sym) = LOC_REGISTER;
+ SYMBOL_IS_ARGUMENT (sym) = 1;
SYMBOL_VALUE (sym) = gdbarch_sdb_reg_to_regnum
(current_gdbarch, cs->c_value);
add_symbol_to_list (sym, &local_symbols);
-#if !defined (BELIEVE_PCC_PROMOTION)
- /* FIXME: This should retain the current type, since it's just
- a register value. gnu@adobe, 26Feb93 */
- {
- /* If PCC says a parameter is a short or a char,
- it is really an int. */
- struct type *temptype;
- temptype =
- lookup_fundamental_type (current_objfile, FT_INTEGER);
- if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (temptype)
- && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT)
- {
- SYMBOL_TYPE (sym) =
- (TYPE_UNSIGNED (SYMBOL_TYPE (sym))
- ? lookup_fundamental_type (current_objfile,
- FT_UNSIGNED_INTEGER)
- : temptype);
- }
- }
-#endif
break;
case C_TPDEF:
}
else
TYPE_NAME (SYMBOL_TYPE (sym)) =
- concat (DEPRECATED_SYMBOL_NAME (sym), (char *)NULL);
+ concat (SYMBOL_LINKAGE_NAME (sym), (char *)NULL);
}
/* Keep track of any type which points to empty structured type,
TYPE_CODE (TYPE_TARGET_TYPE (SYMBOL_TYPE (sym))) !=
TYPE_CODE_UNDEF)
{
- int i = hashname (DEPRECATED_SYMBOL_NAME (sym));
+ int i = hashname (SYMBOL_LINKAGE_NAME (sym));
SYMBOL_VALUE_CHAIN (sym) = opaque_type_chain[i];
opaque_type_chain[i] = sym;
names for anonymous enums, structures, and unions, like
"~0fake" or ".0fake". Thanks, but no thanks... */
if (TYPE_TAG_NAME (SYMBOL_TYPE (sym)) == 0)
- if (DEPRECATED_SYMBOL_NAME (sym) != NULL
- && *DEPRECATED_SYMBOL_NAME (sym) != '~'
- && *DEPRECATED_SYMBOL_NAME (sym) != '.')
+ if (SYMBOL_LINKAGE_NAME (sym) != NULL
+ && *SYMBOL_LINKAGE_NAME (sym) != '~'
+ && *SYMBOL_LINKAGE_NAME (sym) != '.')
TYPE_TAG_NAME (SYMBOL_TYPE (sym)) =
- concat (DEPRECATED_SYMBOL_NAME (sym), (char *)NULL);
+ concat (SYMBOL_LINKAGE_NAME (sym), (char *)NULL);
add_symbol_to_list (sym, &file_symbols);
break;
static struct type *
decode_type (struct coff_symbol *cs, unsigned int c_type,
- union internal_auxent *aux)
+ union internal_auxent *aux, struct objfile *objfile)
{
struct type *type = 0;
unsigned int new_c_type;
new_c_type = DECREF (c_type);
if (ISPTR (c_type))
{
- type = decode_type (cs, new_c_type, aux);
+ type = decode_type (cs, new_c_type, aux, objfile);
type = lookup_pointer_type (type);
}
else if (ISFCN (c_type))
{
- type = decode_type (cs, new_c_type, aux);
+ type = decode_type (cs, new_c_type, aux, objfile);
type = lookup_function_type (type);
}
else if (ISARY (c_type))
*dim = *(dim + 1);
*dim = 0;
- base_type = decode_type (cs, new_c_type, aux);
- index_type = lookup_fundamental_type (current_objfile, FT_INTEGER);
+ base_type = decode_type (cs, new_c_type, aux, objfile);
+ index_type = builtin_type_int32;
range_type =
create_range_type ((struct type *) NULL, index_type, 0, n - 1);
type =
}
}
- return decode_base_type (cs, BTYPE (c_type), aux);
+ return decode_base_type (cs, BTYPE (c_type), aux, objfile);
}
/* Decode a coff type specifier for function definition;
static struct type *
decode_function_type (struct coff_symbol *cs, unsigned int c_type,
- union internal_auxent *aux)
+ union internal_auxent *aux, struct objfile *objfile)
{
if (aux->x_sym.x_tagndx.l == 0)
cs->c_naux = 0; /* auxent refers to function, not base type */
- return decode_type (cs, DECREF (c_type), aux);
+ return decode_type (cs, DECREF (c_type), aux, objfile);
}
\f
/* basic C types */
static struct type *
decode_base_type (struct coff_symbol *cs, unsigned int c_type,
- union internal_auxent *aux)
+ union internal_auxent *aux, struct objfile *objfile)
{
+ struct gdbarch *gdbarch = get_objfile_arch (objfile);
struct type *type;
switch (c_type)
{
case T_NULL:
/* shows up with "void (*foo)();" structure members */
- return lookup_fundamental_type (current_objfile, FT_VOID);
+ return builtin_type (gdbarch)->builtin_void;
#ifdef T_VOID
case T_VOID:
/* Intel 960 COFF has this symbol and meaning. */
- return lookup_fundamental_type (current_objfile, FT_VOID);
+ return builtin_type (gdbarch)->builtin_void;
#endif
case T_CHAR:
- return lookup_fundamental_type (current_objfile, FT_CHAR);
+ return builtin_type (gdbarch)->builtin_char;
case T_SHORT:
- return lookup_fundamental_type (current_objfile, FT_SHORT);
+ return builtin_type (gdbarch)->builtin_short;
case T_INT:
- return lookup_fundamental_type (current_objfile, FT_INTEGER);
+ return builtin_type (gdbarch)->builtin_int;
case T_LONG:
if (cs->c_sclass == C_FIELD
&& aux->x_sym.x_misc.x_lnsz.x_size
- > gdbarch_long_bit (current_gdbarch))
- return lookup_fundamental_type (current_objfile, FT_LONG_LONG);
+ > gdbarch_long_bit (gdbarch))
+ return builtin_type (gdbarch)->builtin_long_long;
else
- return lookup_fundamental_type (current_objfile, FT_LONG);
+ return builtin_type (gdbarch)->builtin_long;
case T_FLOAT:
- return lookup_fundamental_type (current_objfile, FT_FLOAT);
+ return builtin_type (gdbarch)->builtin_float;
case T_DOUBLE:
- return lookup_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT);
+ return builtin_type (gdbarch)->builtin_double;
case T_LNGDBL:
- return lookup_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT);
+ return builtin_type (gdbarch)->builtin_long_double;
case T_STRUCT:
if (cs->c_naux != 1)
{
type = coff_read_struct_type (cs->c_symnum,
aux->x_sym.x_misc.x_lnsz.x_size,
- aux->x_sym.x_fcnary.x_fcn.x_endndx.l);
+ aux->x_sym.x_fcnary.x_fcn.x_endndx.l,
+ objfile);
}
return type;
{
type = coff_read_struct_type (cs->c_symnum,
aux->x_sym.x_misc.x_lnsz.x_size,
- aux->x_sym.x_fcnary.x_fcn.x_endndx.l);
+ aux->x_sym.x_fcnary.x_fcn.x_endndx.l,
+ objfile);
}
TYPE_CODE (type) = TYPE_CODE_UNION;
return type;
{
type = coff_read_enum_type (cs->c_symnum,
aux->x_sym.x_misc.x_lnsz.x_size,
- aux->x_sym.x_fcnary.x_fcn.x_endndx.l);
+ aux->x_sym.x_fcnary.x_fcn.x_endndx.l,
+ objfile);
}
return type;
break;
case T_UCHAR:
- return lookup_fundamental_type (current_objfile, FT_UNSIGNED_CHAR);
+ return builtin_type (gdbarch)->builtin_unsigned_char;
case T_USHORT:
- return lookup_fundamental_type (current_objfile, FT_UNSIGNED_SHORT);
+ return builtin_type (gdbarch)->builtin_unsigned_short;
case T_UINT:
- return lookup_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER);
+ return builtin_type (gdbarch)->builtin_unsigned_int;
case T_ULONG:
if (cs->c_sclass == C_FIELD
&& aux->x_sym.x_misc.x_lnsz.x_size
- > gdbarch_long_bit (current_gdbarch))
- return lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG_LONG);
+ > gdbarch_long_bit (gdbarch))
+ return builtin_type (gdbarch)->builtin_unsigned_long_long;
else
- return lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG);
+ return builtin_type (gdbarch)->builtin_unsigned_long;
}
complaint (&symfile_complaints, _("Unexpected type for symbol %s"), cs->c_name);
- return lookup_fundamental_type (current_objfile, FT_VOID);
+ return builtin_type (gdbarch)->builtin_void;
}
\f
/* This page contains subroutines of read_type. */
object describing the type. */
static struct type *
-coff_read_struct_type (int index, int length, int lastsym)
+coff_read_struct_type (int index, int length, int lastsym,
+ struct objfile *objfile)
{
struct nextfield
{
{
read_one_sym (ms, &sub_sym, &sub_aux);
name = ms->c_name;
- name = EXTERNAL_NAME (name, current_objfile->obfd);
+ name = EXTERNAL_NAME (name, objfile->obfd);
switch (ms->c_sclass)
{
/* Save the data. */
list->field.name =
- obsavestring (name,
- strlen (name),
- ¤t_objfile->objfile_obstack);
- FIELD_TYPE (list->field) = decode_type (ms, ms->c_type, &sub_aux);
- FIELD_BITPOS (list->field) = 8 * ms->c_value;
+ obsavestring (name, strlen (name), &objfile->objfile_obstack);
+ FIELD_TYPE (list->field) = decode_type (ms, ms->c_type, &sub_aux,
+ objfile);
+ SET_FIELD_BITPOS (list->field, 8 * ms->c_value);
FIELD_BITSIZE (list->field) = 0;
- FIELD_STATIC_KIND (list->field) = 0;
nfields++;
break;
/* Save the data. */
list->field.name =
- obsavestring (name,
- strlen (name),
- ¤t_objfile->objfile_obstack);
- FIELD_TYPE (list->field) = decode_type (ms, ms->c_type, &sub_aux);
- FIELD_BITPOS (list->field) = ms->c_value;
+ obsavestring (name, strlen (name), &objfile->objfile_obstack);
+ FIELD_TYPE (list->field) = decode_type (ms, ms->c_type, &sub_aux,
+ objfile);
+ SET_FIELD_BITPOS (list->field, ms->c_value);
FIELD_BITSIZE (list->field) = sub_aux.x_sym.x_misc.x_lnsz.x_size;
- FIELD_STATIC_KIND (list->field) = 0;
nfields++;
break;
Also defines the symbols that represent the values of the type. */
static struct type *
-coff_read_enum_type (int index, int length, int lastsym)
+coff_read_enum_type (int index, int length, int lastsym,
+ struct objfile *objfile)
{
+ struct gdbarch *gdbarch = get_objfile_arch (objfile);
struct symbol *sym;
struct type *type;
int nsyms = 0;
{
read_one_sym (ms, &sub_sym, &sub_aux);
name = ms->c_name;
- name = EXTERNAL_NAME (name, current_objfile->obfd);
+ name = EXTERNAL_NAME (name, objfile->obfd);
switch (ms->c_sclass)
{
case C_MOE:
sym = (struct symbol *) obstack_alloc
- (¤t_objfile->objfile_obstack,
- sizeof (struct symbol));
+ (&objfile->objfile_obstack, sizeof (struct symbol));
memset (sym, 0, sizeof (struct symbol));
- DEPRECATED_SYMBOL_NAME (sym) =
- obsavestring (name, strlen (name),
- ¤t_objfile->objfile_obstack);
+ SYMBOL_SET_LINKAGE_NAME (sym,
+ obsavestring (name, strlen (name),
+ &objfile->objfile_obstack));
SYMBOL_CLASS (sym) = LOC_CONST;
SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
SYMBOL_VALUE (sym) = ms->c_value;
if (length > 0)
TYPE_LENGTH (type) = length;
else /* Assume ints. */
- TYPE_LENGTH (type) = gdbarch_int_bit (current_gdbarch) / TARGET_CHAR_BIT;
+ TYPE_LENGTH (type) = gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT;
TYPE_CODE (type) = TYPE_CODE_ENUM;
TYPE_NFIELDS (type) = nsyms;
TYPE_FIELDS (type) = (struct field *)
{
struct symbol *xsym = syms->symbol[j];
SYMBOL_TYPE (xsym) = type;
- TYPE_FIELD_NAME (type, n) = DEPRECATED_SYMBOL_NAME (xsym);
- TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (xsym);
+ TYPE_FIELD_NAME (type, n) = SYMBOL_LINKAGE_NAME (xsym);
+ SET_FIELD_BITPOS (TYPE_FIELD (type, n), SYMBOL_VALUE (xsym));
if (SYMBOL_VALUE (xsym) < 0)
unsigned_enum = 0;
TYPE_FIELD_BITSIZE (type, n) = 0;
- TYPE_FIELD_STATIC_KIND (type, n) = 0;
}
if (syms == osyms)
break;
}
if (unsigned_enum)
- TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED;
+ TYPE_UNSIGNED (type) = 1;
return type;
}
coff_symfile_read, /* sym_read: read a symbol file into symtab */
coff_symfile_finish, /* sym_finish: finished with file, cleanup */
default_symfile_offsets, /* sym_offsets: xlate external to internal form */
+ default_symfile_segments, /* sym_segments: Get segment information from
+ a file. */
+ NULL, /* sym_read_linetable */
NULL /* next: pointer to next struct sym_fns */
};