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- /* Support routines for decoding "stabs" debugging information format.
- Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995
- Free Software Foundation, Inc.
-
- This file is part of GDB.
-
- 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
- (at your option) any later version.
-
- This program 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 this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /* Support routines for reading and decoding debugging information in
- the "stabs" format. This format is used with many systems that use
- the a.out object file format, as well as some systems that use
- COFF or ELF where the stabs data is placed in a special section.
- Avoid placing any object file format specific code in this file. */
-
- #include "defs.h"
- #include <string.h>
- #include "bfd.h"
- #include "obstack.h"
- #include "symtab.h"
- #include "gdbtypes.h"
- #include "symfile.h"
- #include "objfiles.h"
- #include "aout/stab_gnu.h" /* We always use GNU stabs, not native */
- #include "libaout.h"
- #include "aout/aout64.h"
- #include "gdb-stabs.h"
- #include "buildsym.h"
- #include "complaints.h"
- #include "demangle.h"
-
- #include <ctype.h>
-
- /* Ask stabsread.h to define the vars it normally declares `extern'. */
- #define EXTERN /**/
- #include "stabsread.h" /* Our own declarations */
- #undef EXTERN
-
- /* The routines that read and process a complete stabs for a C struct or
- C++ class pass lists of data member fields and lists of member function
- fields in an instance of a field_info structure, as defined below.
- This is part of some reorganization of low level C++ support and is
- expected to eventually go away... (FIXME) */
-
- struct field_info
- {
- struct nextfield
- {
- struct nextfield *next;
-
- /* This is the raw visibility from the stab. It is not checked
- for being one of the visibilities we recognize, so code which
- examines this field better be able to deal. */
- int visibility;
-
- struct field field;
- } *list;
- struct next_fnfieldlist
- {
- struct next_fnfieldlist *next;
- struct fn_fieldlist fn_fieldlist;
- } *fnlist;
- };
-
- static struct type *
- dbx_alloc_type PARAMS ((int [2], struct objfile *));
-
- static long read_huge_number PARAMS ((char **, int, int *));
-
- static struct type *error_type PARAMS ((char **));
-
- static void
- patch_block_stabs PARAMS ((struct pending *, struct pending_stabs *,
- struct objfile *));
-
- static void
- fix_common_block PARAMS ((struct symbol *, int));
-
- static int
- read_type_number PARAMS ((char **, int *));
-
- static struct type *
- read_range_type PARAMS ((char **, int [2], struct objfile *));
-
- static struct type *
- read_sun_builtin_type PARAMS ((char **, int [2], struct objfile *));
-
- static struct type *
- read_sun_floating_type PARAMS ((char **, int [2], struct objfile *));
-
- static struct type *
- read_enum_type PARAMS ((char **, struct type *, struct objfile *));
-
- static struct type *
- rs6000_builtin_type PARAMS ((int));
-
- static int
- read_member_functions PARAMS ((struct field_info *, char **, struct type *,
- struct objfile *));
-
- static int
- read_struct_fields PARAMS ((struct field_info *, char **, struct type *,
- struct objfile *));
-
- static int
- read_baseclasses PARAMS ((struct field_info *, char **, struct type *,
- struct objfile *));
-
- static int
- read_tilde_fields PARAMS ((struct field_info *, char **, struct type *,
- struct objfile *));
-
- static int
- attach_fn_fields_to_type PARAMS ((struct field_info *, struct type *));
-
- static int
- attach_fields_to_type PARAMS ((struct field_info *, struct type *,
- struct objfile *));
-
- static struct type *
- read_struct_type PARAMS ((char **, struct type *, struct objfile *));
-
- static struct type *
- read_array_type PARAMS ((char **, struct type *, struct objfile *));
-
- static struct type **
- read_args PARAMS ((char **, int, struct objfile *));
-
- static int
- read_cpp_abbrev PARAMS ((struct field_info *, char **, struct type *,
- struct objfile *));
-
- static const char vptr_name[] = { '_','v','p','t','r',CPLUS_MARKER,'\0' };
- static const char vb_name[] = { '_','v','b',CPLUS_MARKER,'\0' };
-
- /* Define this as 1 if a pcc declaration of a char or short argument
- gives the correct address. Otherwise assume pcc gives the
- address of the corresponding int, which is not the same on a
- big-endian machine. */
-
- #ifndef BELIEVE_PCC_PROMOTION
- #define BELIEVE_PCC_PROMOTION 0
- #endif
-
- struct complaint invalid_cpp_abbrev_complaint =
- {"invalid C++ abbreviation `%s'", 0, 0};
-
- struct complaint invalid_cpp_type_complaint =
- {"C++ abbreviated type name unknown at symtab pos %d", 0, 0};
-
- struct complaint member_fn_complaint =
- {"member function type missing, got '%c'", 0, 0};
-
- struct complaint const_vol_complaint =
- {"const/volatile indicator missing, got '%c'", 0, 0};
-
- struct complaint error_type_complaint =
- {"debug info mismatch between compiler and debugger", 0, 0};
-
- struct complaint invalid_member_complaint =
- {"invalid (minimal) member type data format at symtab pos %d.", 0, 0};
-
- struct complaint range_type_base_complaint =
- {"base type %d of range type is not defined", 0, 0};
-
- struct complaint reg_value_complaint =
- {"register number too large in symbol %s", 0, 0};
-
- struct complaint vtbl_notfound_complaint =
- {"virtual function table pointer not found when defining class `%s'", 0, 0};
-
- struct complaint unrecognized_cplus_name_complaint =
- {"Unknown C++ symbol name `%s'", 0, 0};
-
- struct complaint rs6000_builtin_complaint =
- {"Unknown builtin type %d", 0, 0};
-
- struct complaint unresolved_sym_chain_complaint =
- {"%s: `%s' from global_sym_chain unresolved", 0, 0};
-
- struct complaint stabs_general_complaint =
- {"%s", 0, 0};
-
- /* Make a list of forward references which haven't been defined. */
-
- static struct type **undef_types;
- static int undef_types_allocated;
- static int undef_types_length;
-
- /* Check for and handle cretinous stabs symbol name continuation! */
- #define STABS_CONTINUE(pp) \
- do { \
- if (**(pp) == '\\' || (**(pp) == '?' && (*(pp))[1] == '\0')) \
- *(pp) = next_symbol_text (); \
- } while (0)
-
- /* FIXME: These probably should be our own types (like rs6000_builtin_type
- has its own types) rather than builtin_type_*. */
- static struct type **os9k_type_vector[] = {
- 0,
- &builtin_type_int,
- &builtin_type_char,
- &builtin_type_long,
- &builtin_type_short,
- &builtin_type_unsigned_char,
- &builtin_type_unsigned_short,
- &builtin_type_unsigned_long,
- &builtin_type_unsigned_int,
- &builtin_type_float,
- &builtin_type_double,
- &builtin_type_void,
- &builtin_type_long_double
- };
-
- static void os9k_init_type_vector PARAMS ((struct type **));
-
- static void
- os9k_init_type_vector(tv)
- struct type **tv;
- {
- int i;
- for (i=0; i<sizeof(os9k_type_vector)/sizeof(struct type **); i++)
- tv[i] = (os9k_type_vector[i] == 0 ? 0 : *(os9k_type_vector[i]));
- }
-
- /* Look up a dbx type-number pair. Return the address of the slot
- where the type for that number-pair is stored.
- The number-pair is in TYPENUMS.
-
- This can be used for finding the type associated with that pair
- or for associating a new type with the pair. */
-
- struct type **
- dbx_lookup_type (typenums)
- int typenums[2];
- {
- register int filenum = typenums[0];
- register int index = typenums[1];
- unsigned old_len;
- register int real_filenum;
- register struct header_file *f;
- int f_orig_length;
-
- if (filenum == -1) /* -1,-1 is for temporary types. */
- return 0;
-
- if (filenum < 0 || filenum >= n_this_object_header_files)
- {
- static struct complaint msg = {"\
- Invalid symbol data: type number (%d,%d) out of range at symtab pos %d.",
- 0, 0};
- complain (&msg, filenum, index, symnum);
- goto error_return;
- }
-
- if (filenum == 0)
- {
- if (index < 0)
- {
- /* Caller wants address of address of type. We think
- that negative (rs6k builtin) types will never appear as
- "lvalues", (nor should they), so we stuff the real type
- pointer into a temp, and return its address. If referenced,
- this will do the right thing. */
- static struct type *temp_type;
-
- temp_type = rs6000_builtin_type(index);
- return &temp_type;
- }
-
- /* Type is defined outside of header files.
- Find it in this object file's type vector. */
- if (index >= type_vector_length)
- {
- old_len = type_vector_length;
- if (old_len == 0)
- {
- type_vector_length = INITIAL_TYPE_VECTOR_LENGTH;
- type_vector = (struct type **)
- malloc (type_vector_length * sizeof (struct type *));
- }
- while (index >= type_vector_length)
- {
- type_vector_length *= 2;
- }
- type_vector = (struct type **)
- xrealloc ((char *) type_vector,
- (type_vector_length * sizeof (struct type *)));
- memset (&type_vector[old_len], 0,
- (type_vector_length - old_len) * sizeof (struct type *));
-
- if (os9k_stabs)
- /* Deal with OS9000 fundamental types. */
- os9k_init_type_vector (type_vector);
- }
- return (&type_vector[index]);
- }
- else
- {
- real_filenum = this_object_header_files[filenum];
-
- if (real_filenum >= n_header_files)
- {
- struct type *temp_type;
- struct type **temp_type_p;
-
- warning ("GDB internal error: bad real_filenum");
-
- error_return:
- temp_type = init_type (TYPE_CODE_ERROR, 0, 0, NULL, NULL);
- temp_type_p = (struct type **) xmalloc (sizeof (struct type *));
- *temp_type_p = temp_type;
- return temp_type_p;
- }
-
- f = &header_files[real_filenum];
-
- f_orig_length = f->length;
- if (index >= f_orig_length)
- {
- while (index >= f->length)
- {
- f->length *= 2;
- }
- f->vector = (struct type **)
- xrealloc ((char *) f->vector, f->length * sizeof (struct type *));
- memset (&f->vector[f_orig_length], 0,
- (f->length - f_orig_length) * sizeof (struct type *));
- }
- return (&f->vector[index]);
- }
- }
-
- /* Make sure there is a type allocated for type numbers TYPENUMS
- and return the type object.
- This can create an empty (zeroed) type object.
- TYPENUMS may be (-1, -1) to return a new type object that is not
- put into the type vector, and so may not be referred to by number. */
-
- static struct type *
- dbx_alloc_type (typenums, objfile)
- int typenums[2];
- struct objfile *objfile;
- {
- register struct type **type_addr;
-
- if (typenums[0] == -1)
- {
- return (alloc_type (objfile));
- }
-
- type_addr = dbx_lookup_type (typenums);
-
- /* If we are referring to a type not known at all yet,
- allocate an empty type for it.
- We will fill it in later if we find out how. */
- if (*type_addr == 0)
- {
- *type_addr = alloc_type (objfile);
- }
-
- return (*type_addr);
- }
-
- /* for all the stabs in a given stab vector, build appropriate types
- and fix their symbols in given symbol vector. */
-
- static void
- patch_block_stabs (symbols, stabs, objfile)
- struct pending *symbols;
- struct pending_stabs *stabs;
- struct objfile *objfile;
- {
- int ii;
- char *name;
- char *pp;
- struct symbol *sym;
-
- if (stabs)
- {
-
- /* for all the stab entries, find their corresponding symbols and
- patch their types! */
-
- for (ii = 0; ii < stabs->count; ++ii)
- {
- name = stabs->stab[ii];
- pp = (char*) strchr (name, ':');
- while (pp[1] == ':')
- {
- pp += 2;
- pp = (char *)strchr(pp, ':');
- }
- sym = find_symbol_in_list (symbols, name, pp-name);
- if (!sym)
- {
- /* FIXME-maybe: it would be nice if we noticed whether
- the variable was defined *anywhere*, not just whether
- it is defined in this compilation unit. But neither
- xlc or GCC seem to need such a definition, and until
- we do psymtabs (so that the minimal symbols from all
- compilation units are available now), I'm not sure
- how to get the information. */
-
- /* On xcoff, if a global is defined and never referenced,
- ld will remove it from the executable. There is then
- a N_GSYM stab for it, but no regular (C_EXT) symbol. */
- sym = (struct symbol *)
- obstack_alloc (&objfile->symbol_obstack,
- sizeof (struct symbol));
-
- memset (sym, 0, sizeof (struct symbol));
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
- SYMBOL_NAME (sym) =
- obstack_copy0 (&objfile->symbol_obstack, name, pp - name);
- pp += 2;
- if (*(pp-1) == 'F' || *(pp-1) == 'f')
- {
- /* I don't think the linker does this with functions,
- so as far as I know this is never executed.
- But it doesn't hurt to check. */
- SYMBOL_TYPE (sym) =
- lookup_function_type (read_type (&pp, objfile));
- }
- else
- {
- SYMBOL_TYPE (sym) = read_type (&pp, objfile);
- }
- add_symbol_to_list (sym, &global_symbols);
- }
- else
- {
- pp += 2;
- if (*(pp-1) == 'F' || *(pp-1) == 'f')
- {
- SYMBOL_TYPE (sym) =
- lookup_function_type (read_type (&pp, objfile));
- }
- else
- {
- SYMBOL_TYPE (sym) = read_type (&pp, objfile);
- }
- }
- }
- }
- }
-
-
- /* Read a number by which a type is referred to in dbx data,
- or perhaps read a pair (FILENUM, TYPENUM) in parentheses.
- Just a single number N is equivalent to (0,N).
- Return the two numbers by storing them in the vector TYPENUMS.
- TYPENUMS will then be used as an argument to dbx_lookup_type.
-
- Returns 0 for success, -1 for error. */
-
- static int
- read_type_number (pp, typenums)
- register char **pp;
- register int *typenums;
- {
- int nbits;
- if (**pp == '(')
- {
- (*pp)++;
- typenums[0] = read_huge_number (pp, ',', &nbits);
- if (nbits != 0) return -1;
- typenums[1] = read_huge_number (pp, ')', &nbits);
- if (nbits != 0) return -1;
- }
- else
- {
- typenums[0] = 0;
- typenums[1] = read_huge_number (pp, 0, &nbits);
- if (nbits != 0) return -1;
- }
- return 0;
- }
-
-
- /* To handle GNU C++ typename abbreviation, we need to be able to
- fill in a type's name as soon as space for that type is allocated.
- `type_synonym_name' is the name of the type being allocated.
- It is cleared as soon as it is used (lest all allocated types
- get this name). */
-
- static char *type_synonym_name;
-
- #if !defined (REG_STRUCT_HAS_ADDR)
- #define REG_STRUCT_HAS_ADDR(gcc_p,type) 0
- #endif
-
- /* ARGSUSED */
- struct symbol *
- define_symbol (valu, string, desc, type, objfile)
- CORE_ADDR valu;
- char *string;
- int desc;
- int type;
- struct objfile *objfile;
- {
- register struct symbol *sym;
- char *p = (char *) strchr (string, ':');
- int deftype;
- int synonym = 0;
- register int i;
-
- /* We would like to eliminate nameless symbols, but keep their types.
- E.g. stab entry ":t10=*2" should produce a type 10, which is a pointer
- to type 2, but, should not create a symbol to address that type. Since
- the symbol will be nameless, there is no way any user can refer to it. */
-
- int nameless;
-
- /* Ignore syms with empty names. */
- if (string[0] == 0)
- return 0;
-
- /* Ignore old-style symbols from cc -go */
- if (p == 0)
- return 0;
-
- while (p[1] == ':')
- {
- p += 2;
- p = strchr(p, ':');
- }
-
- /* If a nameless stab entry, all we need is the type, not the symbol.
- e.g. ":t10=*2" or a nameless enum like " :T16=ered:0,green:1,blue:2,;" */
- nameless = (p == string || ((string[0] == ' ') && (string[1] == ':')));
-
- sym = (struct symbol *)
- obstack_alloc (&objfile -> symbol_obstack, sizeof (struct symbol));
- memset (sym, 0, sizeof (struct symbol));
-
- switch (type & N_TYPE)
- {
- case N_TEXT:
- SYMBOL_SECTION(sym) = SECT_OFF_TEXT;
- break;
- case N_DATA:
- SYMBOL_SECTION(sym) = SECT_OFF_DATA;
- break;
- case N_BSS:
- SYMBOL_SECTION(sym) = SECT_OFF_BSS;
- break;
- }
-
- if (processing_gcc_compilation)
- {
- /* GCC 2.x puts the line number in desc. SunOS apparently puts in the
- number of bytes occupied by a type or object, which we ignore. */
- SYMBOL_LINE(sym) = desc;
- }
- else
- {
- SYMBOL_LINE(sym) = 0; /* unknown */
- }
-
- if (string[0] == CPLUS_MARKER)
- {
- /* Special GNU C++ names. */
- switch (string[1])
- {
- case 't':
- SYMBOL_NAME (sym) = obsavestring ("this", strlen ("this"),
- &objfile -> symbol_obstack);
- break;
-
- case 'v': /* $vtbl_ptr_type */
- /* Was: SYMBOL_NAME (sym) = "vptr"; */
- goto normal;
-
- case 'e':
- SYMBOL_NAME (sym) = obsavestring ("eh_throw", strlen ("eh_throw"),
- &objfile -> symbol_obstack);
- break;
-
- case '_':
- /* This was an anonymous type that was never fixed up. */
- goto normal;
-
- default:
- complain (&unrecognized_cplus_name_complaint, string);
- goto normal; /* Do *something* with it */
- }
- }
- else
- {
- normal:
- SYMBOL_LANGUAGE (sym) = current_subfile -> language;
- SYMBOL_NAME (sym) = (char *)
- obstack_alloc (&objfile -> symbol_obstack, ((p - string) + 1));
- /* Open-coded memcpy--saves function call time. */
- /* FIXME: Does it really? Try replacing with simple strcpy and
- try it on an executable with a large symbol table. */
- /* FIXME: considering that gcc can open code memcpy anyway, I
- doubt it. xoxorich. */
- {
- register char *p1 = string;
- register char *p2 = SYMBOL_NAME (sym);
- while (p1 != p)
- {
- *p2++ = *p1++;
- }
- *p2++ = '\0';
- }
-
- /* If this symbol is from a C++ compilation, then attempt to cache the
- demangled form for future reference. This is a typical time versus
- space tradeoff, that was decided in favor of time because it sped up
- C++ symbol lookups by a factor of about 20. */
-
- SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack);
- }
- p++;
-
- /* Determine the type of name being defined. */
- #if 0
- /* Getting GDB to correctly skip the symbol on an undefined symbol
- descriptor and not ever dump core is a very dodgy proposition if
- we do things this way. I say the acorn RISC machine can just
- fix their compiler. */
- /* The Acorn RISC machine's compiler can put out locals that don't
- start with "234=" or "(3,4)=", so assume anything other than the
- deftypes we know how to handle is a local. */
- if (!strchr ("cfFGpPrStTvVXCR", *p))
- #else
- if (isdigit (*p) || *p == '(' || *p == '-')
- #endif
- deftype = 'l';
- else
- deftype = *p++;
-
- switch (deftype)
- {
- case 'c':
- /* c is a special case, not followed by a type-number.
- SYMBOL:c=iVALUE for an integer constant symbol.
- SYMBOL:c=rVALUE for a floating constant symbol.
- SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
- e.g. "b:c=e6,0" for "const b = blob1"
- (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
- if (*p != '=')
- {
- SYMBOL_CLASS (sym) = LOC_CONST;
- SYMBOL_TYPE (sym) = error_type (&p);
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &file_symbols);
- return sym;
- }
- ++p;
- switch (*p++)
- {
- case 'r':
- {
- double d = atof (p);
- char *dbl_valu;
-
- /* FIXME-if-picky-about-floating-accuracy: Should be using
- target arithmetic to get the value. real.c in GCC
- probably has the necessary code. */
-
- /* FIXME: lookup_fundamental_type is a hack. We should be
- creating a type especially for the type of float constants.
- Problem is, what type should it be?
-
- Also, what should the name of this type be? Should we
- be using 'S' constants (see stabs.texinfo) instead? */
-
- SYMBOL_TYPE (sym) = lookup_fundamental_type (objfile,
- FT_DBL_PREC_FLOAT);
- dbl_valu = (char *)
- obstack_alloc (&objfile -> symbol_obstack,
- TYPE_LENGTH (SYMBOL_TYPE (sym)));
- store_floating (dbl_valu, TYPE_LENGTH (SYMBOL_TYPE (sym)), d);
- SYMBOL_VALUE_BYTES (sym) = dbl_valu;
- SYMBOL_CLASS (sym) = LOC_CONST_BYTES;
- }
- break;
- case 'i':
- {
- /* Defining integer constants this way is kind of silly,
- since 'e' constants allows the compiler to give not
- only the value, but the type as well. C has at least
- int, long, unsigned int, and long long as constant
- types; other languages probably should have at least
- unsigned as well as signed constants. */
-
- /* We just need one int constant type for all objfiles.
- It doesn't depend on languages or anything (arguably its
- name should be a language-specific name for a type of
- that size, but I'm inclined to say that if the compiler
- wants a nice name for the type, it can use 'e'). */
- static struct type *int_const_type;
-
- /* Yes, this is as long as a *host* int. That is because we
- use atoi. */
- if (int_const_type == NULL)
- int_const_type =
- init_type (TYPE_CODE_INT,
- sizeof (int) * HOST_CHAR_BIT / TARGET_CHAR_BIT, 0,
- "integer constant",
- (struct objfile *)NULL);
- SYMBOL_TYPE (sym) = int_const_type;
- SYMBOL_VALUE (sym) = atoi (p);
- SYMBOL_CLASS (sym) = LOC_CONST;
- }
- break;
- case 'e':
- /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
- can be represented as integral.
- e.g. "b:c=e6,0" for "const b = blob1"
- (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
- {
- SYMBOL_CLASS (sym) = LOC_CONST;
- SYMBOL_TYPE (sym) = read_type (&p, objfile);
-
- if (*p != ',')
- {
- SYMBOL_TYPE (sym) = error_type (&p);
- break;
- }
- ++p;
-
- /* If the value is too big to fit in an int (perhaps because
- it is unsigned), or something like that, we silently get
- a bogus value. The type and everything else about it is
- correct. Ideally, we should be using whatever we have
- available for parsing unsigned and long long values,
- however. */
- SYMBOL_VALUE (sym) = atoi (p);
- }
- break;
- default:
- {
- SYMBOL_CLASS (sym) = LOC_CONST;
- SYMBOL_TYPE (sym) = error_type (&p);
- }
- }
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &file_symbols);
- return sym;
-
- case 'C':
- /* The name of a caught exception. */
- SYMBOL_TYPE (sym) = read_type (&p, objfile);
- SYMBOL_CLASS (sym) = LOC_LABEL;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- SYMBOL_VALUE_ADDRESS (sym) = valu;
- add_symbol_to_list (sym, &local_symbols);
- break;
-
- case 'f':
- /* A static function definition. */
- SYMBOL_TYPE (sym) = read_type (&p, objfile);
- SYMBOL_CLASS (sym) = LOC_BLOCK;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &file_symbols);
- /* fall into process_function_types. */
-
- process_function_types:
- /* Function result types are described as the result type in stabs.
- We need to convert this to the function-returning-type-X type
- in GDB. E.g. "int" is converted to "function returning int". */
- if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_FUNC)
- {
- #if 0
- /* This code doesn't work -- it needs to realloc and can't. */
- /* Attempt to set up to record a function prototype... */
- struct type *new = alloc_type (objfile);
-
- /* Generate a template for the type of this function. The
- types of the arguments will be added as we read the symbol
- table. */
- *new = *lookup_function_type (SYMBOL_TYPE(sym));
- SYMBOL_TYPE(sym) = new;
- TYPE_OBJFILE (new) = objfile;
- in_function_type = new;
- #else
- SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym));
- #endif
- }
- /* fall into process_prototype_types */
-
- process_prototype_types:
- /* Sun acc puts declared types of arguments here. We don't care
- about their actual types (FIXME -- we should remember the whole
- function prototype), but the list may define some new types
- that we have to remember, so we must scan it now. */
- while (*p == ';') {
- p++;
- read_type (&p, objfile);
- }
- break;
-
- case 'F':
- /* A global function definition. */
- SYMBOL_TYPE (sym) = read_type (&p, objfile);
- SYMBOL_CLASS (sym) = LOC_BLOCK;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &global_symbols);
- goto process_function_types;
-
- case 'G':
- /* For a class G (global) symbol, it appears that the
- value is not correct. It is necessary to search for the
- corresponding linker definition to find the value.
- These definitions appear at the end of the namelist. */
- SYMBOL_TYPE (sym) = read_type (&p, objfile);
- i = hashname (SYMBOL_NAME (sym));
- SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
- global_sym_chain[i] = sym;
- SYMBOL_CLASS (sym) = LOC_STATIC;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &global_symbols);
- break;
-
- /* This case is faked by a conditional above,
- when there is no code letter in the dbx data.
- Dbx data never actually contains 'l'. */
- case 's':
- case 'l':
- SYMBOL_TYPE (sym) = read_type (&p, objfile);
- SYMBOL_CLASS (sym) = LOC_LOCAL;
- SYMBOL_VALUE (sym) = valu;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &local_symbols);
- break;
-
- case 'p':
- if (*p == 'F')
- /* pF is a two-letter code that means a function parameter in Fortran.
- The type-number specifies the type of the return value.
- Translate it into a pointer-to-function type. */
- {
- p++;
- SYMBOL_TYPE (sym)
- = lookup_pointer_type
- (lookup_function_type (read_type (&p, objfile)));
- }
- else
- SYMBOL_TYPE (sym) = read_type (&p, objfile);
-
- /* Normally this is a parameter, a LOC_ARG. On the i960, it
- can also be a LOC_LOCAL_ARG depending on symbol type. */
- #ifndef DBX_PARM_SYMBOL_CLASS
- #define DBX_PARM_SYMBOL_CLASS(type) LOC_ARG
- #endif
-
- SYMBOL_CLASS (sym) = DBX_PARM_SYMBOL_CLASS (type);
- SYMBOL_VALUE (sym) = valu;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- #if 0
- /* This doesn't work yet. */
- add_param_to_type (&in_function_type, sym);
- #endif
- add_symbol_to_list (sym, &local_symbols);
-
- if (TARGET_BYTE_ORDER != BIG_ENDIAN)
- {
- /* On little-endian machines, this crud is never necessary,
- and, if the extra bytes contain garbage, is harmful. */
- break;
- }
-
- /* If it's gcc-compiled, if it says `short', believe it. */
- if (processing_gcc_compilation || BELIEVE_PCC_PROMOTION)
- break;
-
- #if !BELIEVE_PCC_PROMOTION
- {
- /* This is the signed type which arguments get promoted to. */
- static struct type *pcc_promotion_type;
- /* This is the unsigned type which arguments get promoted to. */
- static struct type *pcc_unsigned_promotion_type;
-
- /* Call it "int" because this is mainly C lossage. */
- if (pcc_promotion_type == NULL)
- pcc_promotion_type =
- init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
- 0, "int", NULL);
-
- if (pcc_unsigned_promotion_type == NULL)
- pcc_unsigned_promotion_type =
- init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
- TYPE_FLAG_UNSIGNED, "unsigned int", NULL);
-
- #if defined(BELIEVE_PCC_PROMOTION_TYPE)
- /* This macro is defined on machines (e.g. sparc) where
- we should believe the type of a PCC 'short' argument,
- but shouldn't believe the address (the address is
- the address of the corresponding int).
-
- My guess is that this correction, as opposed to changing
- the parameter to an 'int' (as done below, for PCC
- on most machines), is the right thing to do
- on all machines, but I don't want to risk breaking
- something that already works. On most PCC machines,
- the sparc problem doesn't come up because the calling
- function has to zero the top bytes (not knowing whether
- the called function wants an int or a short), so there
- is little practical difference between an int and a short
- (except perhaps what happens when the GDB user types
- "print short_arg = 0x10000;").
-
- Hacked for SunOS 4.1 by gnu@cygnus.com. In 4.1, the compiler
- actually produces the correct address (we don't need to fix it
- up). I made this code adapt so that it will offset the symbol
- if it was pointing at an int-aligned location and not
- otherwise. This way you can use the same gdb for 4.0.x and
- 4.1 systems.
-
- If the parameter is shorter than an int, and is integral
- (e.g. char, short, or unsigned equivalent), and is claimed to
- be passed on an integer boundary, don't believe it! Offset the
- parameter's address to the tail-end of that integer. */
-
- if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (pcc_promotion_type)
- && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT
- && 0 == SYMBOL_VALUE (sym) % TYPE_LENGTH (pcc_promotion_type))
- {
- SYMBOL_VALUE (sym) += TYPE_LENGTH (pcc_promotion_type)
- - TYPE_LENGTH (SYMBOL_TYPE (sym));
- }
- break;
-
- #else /* no BELIEVE_PCC_PROMOTION_TYPE. */
-
- /* If PCC says a parameter is a short or a char,
- it is really an int. */
- if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (pcc_promotion_type)
- && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT)
- {
- SYMBOL_TYPE (sym) =
- TYPE_UNSIGNED (SYMBOL_TYPE (sym))
- ? pcc_unsigned_promotion_type
- : pcc_promotion_type;
- }
- break;
-
- #endif /* no BELIEVE_PCC_PROMOTION_TYPE. */
- }
- #endif /* !BELIEVE_PCC_PROMOTION. */
-
- case 'P':
- /* acc seems to use P to delare the prototypes of functions that
- are referenced by this file. gdb is not prepared to deal
- with this extra information. FIXME, it ought to. */
- if (type == N_FUN)
- {
- read_type (&p, objfile);
- goto process_prototype_types;
- }
- /*FALLTHROUGH*/
-
- case 'R':
- /* Parameter which is in a register. */
- SYMBOL_TYPE (sym) = read_type (&p, objfile);
- SYMBOL_CLASS (sym) = LOC_REGPARM;
- SYMBOL_VALUE (sym) = STAB_REG_TO_REGNUM (valu);
- if (SYMBOL_VALUE (sym) >= NUM_REGS)
- {
- complain (®_value_complaint, SYMBOL_SOURCE_NAME (sym));
- SYMBOL_VALUE (sym) = SP_REGNUM; /* Known safe, though useless */
- }
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &local_symbols);
- break;
-
- case 'r':
- /* Register variable (either global or local). */
- SYMBOL_TYPE (sym) = read_type (&p, objfile);
- SYMBOL_CLASS (sym) = LOC_REGISTER;
- SYMBOL_VALUE (sym) = STAB_REG_TO_REGNUM (valu);
- if (SYMBOL_VALUE (sym) >= NUM_REGS)
- {
- complain (®_value_complaint, SYMBOL_SOURCE_NAME (sym));
- SYMBOL_VALUE (sym) = SP_REGNUM; /* Known safe, though useless */
- }
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- if (within_function)
- {
- /* Sun cc uses a pair of symbols, one 'p' and one 'r' with the same
- name to represent an argument passed in a register.
- GCC uses 'P' for the same case. So if we find such a symbol pair
- we combine it into one 'P' symbol. For Sun cc we need to do this
- regardless of REG_STRUCT_HAS_ADDR, because the compiler puts out
- the 'p' symbol even if it never saves the argument onto the stack.
-
- On most machines, we want to preserve both symbols, so that
- we can still get information about what is going on with the
- stack (VAX for computing args_printed, using stack slots instead
- of saved registers in backtraces, etc.).
-
- Note that this code illegally combines
- main(argc) struct foo argc; { register struct foo argc; }
- but this case is considered pathological and causes a warning
- from a decent compiler. */
-
- if (local_symbols
- && local_symbols->nsyms > 0
- #ifndef USE_REGISTER_NOT_ARG
- && REG_STRUCT_HAS_ADDR (processing_gcc_compilation,
- SYMBOL_TYPE (sym))
- && (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT
- || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_UNION)
- #endif
- )
- {
- struct symbol *prev_sym;
- prev_sym = local_symbols->symbol[local_symbols->nsyms - 1];
- if ((SYMBOL_CLASS (prev_sym) == LOC_REF_ARG
- || SYMBOL_CLASS (prev_sym) == LOC_ARG)
- && STREQ (SYMBOL_NAME (prev_sym), SYMBOL_NAME(sym)))
- {
- SYMBOL_CLASS (prev_sym) = LOC_REGPARM;
- /* Use the type from the LOC_REGISTER; that is the type
- that is actually in that register. */
- SYMBOL_TYPE (prev_sym) = SYMBOL_TYPE (sym);
- SYMBOL_VALUE (prev_sym) = SYMBOL_VALUE (sym);
- sym = prev_sym;
- break;
- }
- }
- add_symbol_to_list (sym, &local_symbols);
- }
- else
- add_symbol_to_list (sym, &file_symbols);
- break;
-
- case 'S':
- /* Static symbol at top level of file */
- SYMBOL_TYPE (sym) = read_type (&p, objfile);
- SYMBOL_CLASS (sym) = LOC_STATIC;
- SYMBOL_VALUE_ADDRESS (sym) = valu;
- #ifdef STATIC_TRANSFORM_NAME
- if (SYMBOL_NAME (sym)[0] == '$')
- {
- struct minimal_symbol *msym;
- msym = lookup_minimal_symbol (SYMBOL_NAME (sym), NULL, objfile);
- if (msym != NULL)
- {
- SYMBOL_NAME (sym) = STATIC_TRANSFORM_NAME (SYMBOL_NAME (sym));
- SYMBOL_VALUE_ADDRESS (sym) = SYMBOL_VALUE_ADDRESS (msym);
- }
- }
- #endif
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &file_symbols);
- break;
-
- case 't':
- SYMBOL_TYPE (sym) = read_type (&p, objfile);
-
- /* For a nameless type, we don't want a create a symbol, thus we
- did not use `sym'. Return without further processing. */
- if (nameless) return NULL;
-
- SYMBOL_CLASS (sym) = LOC_TYPEDEF;
- SYMBOL_VALUE (sym) = valu;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- /* C++ vagaries: we may have a type which is derived from
- a base type which did not have its name defined when the
- derived class was output. We fill in the derived class's
- base part member's name here in that case. */
- if (TYPE_NAME (SYMBOL_TYPE (sym)) != NULL)
- if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT
- || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_UNION)
- && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)))
- {
- int j;
- for (j = TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)) - 1; j >= 0; j--)
- if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) == 0)
- TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) =
- type_name_no_tag (TYPE_BASECLASS (SYMBOL_TYPE (sym), j));
- }
-
- if (TYPE_NAME (SYMBOL_TYPE (sym)) == NULL)
- {
- /* gcc-2.6 or later (when using -fvtable-thunks)
- emits a unique named type for a vtable entry.
- Some gdb code depends on that specific name. */
- extern const char vtbl_ptr_name[];
-
- if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR
- && strcmp (SYMBOL_NAME (sym), vtbl_ptr_name))
- || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FUNC)
- {
- /* If we are giving a name to a type such as "pointer to
- foo" or "function returning foo", we better not set
- the TYPE_NAME. If the program contains "typedef char
- *caddr_t;", we don't want all variables of type char
- * to print as caddr_t. This is not just a
- consequence of GDB's type management; PCC and GCC (at
- least through version 2.4) both output variables of
- either type char * or caddr_t with the type number
- defined in the 't' symbol for caddr_t. If a future
- compiler cleans this up it GDB is not ready for it
- yet, but if it becomes ready we somehow need to
- disable this check (without breaking the PCC/GCC2.4
- case).
-
- Sigh.
-
- Fortunately, this check seems not to be necessary
- for anything except pointers or functions. */
- }
- else
- TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_NAME (sym);
- }
-
- add_symbol_to_list (sym, &file_symbols);
- break;
-
- case 'T':
- /* Struct, union, or enum tag. For GNU C++, this can be be followed
- by 't' which means we are typedef'ing it as well. */
- synonym = *p == 't';
-
- if (synonym)
- {
- p++;
- type_synonym_name = obsavestring (SYMBOL_NAME (sym),
- strlen (SYMBOL_NAME (sym)),
- &objfile -> symbol_obstack);
- }
- /* The semantics of C++ state that "struct foo { ... }" also defines
- a typedef for "foo". Unfortunately, cfront never makes the typedef
- when translating C++ into C. We make the typedef here so that
- "ptype foo" works as expected for cfront translated code. */
- else if (current_subfile->language == language_cplus)
- {
- synonym = 1;
- type_synonym_name = obsavestring (SYMBOL_NAME (sym),
- strlen (SYMBOL_NAME (sym)),
- &objfile -> symbol_obstack);
- }
-
- SYMBOL_TYPE (sym) = read_type (&p, objfile);
-
- /* For a nameless type, we don't want a create a symbol, thus we
- did not use `sym'. Return without further processing. */
- if (nameless) return NULL;
-
- SYMBOL_CLASS (sym) = LOC_TYPEDEF;
- SYMBOL_VALUE (sym) = valu;
- SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE;
- if (TYPE_TAG_NAME (SYMBOL_TYPE (sym)) == 0)
- TYPE_TAG_NAME (SYMBOL_TYPE (sym))
- = obconcat (&objfile -> type_obstack, "", "", SYMBOL_NAME (sym));
- add_symbol_to_list (sym, &file_symbols);
-
- if (synonym)
- {
- /* Clone the sym and then modify it. */
- register struct symbol *typedef_sym = (struct symbol *)
- obstack_alloc (&objfile -> symbol_obstack, sizeof (struct symbol));
- *typedef_sym = *sym;
- SYMBOL_CLASS (typedef_sym) = LOC_TYPEDEF;
- SYMBOL_VALUE (typedef_sym) = valu;
- SYMBOL_NAMESPACE (typedef_sym) = VAR_NAMESPACE;
- if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
- TYPE_NAME (SYMBOL_TYPE (sym))
- = obconcat (&objfile -> type_obstack, "", "", SYMBOL_NAME (sym));
- add_symbol_to_list (typedef_sym, &file_symbols);
- }
- break;
-
- case 'V':
- /* Static symbol of local scope */
- SYMBOL_TYPE (sym) = read_type (&p, objfile);
- SYMBOL_CLASS (sym) = LOC_STATIC;
- SYMBOL_VALUE_ADDRESS (sym) = valu;
- #ifdef STATIC_TRANSFORM_NAME
- if (SYMBOL_NAME (sym)[0] == '$')
- {
- struct minimal_symbol *msym;
- msym = lookup_minimal_symbol (SYMBOL_NAME (sym), NULL, objfile);
- if (msym != NULL)
- {
- SYMBOL_NAME (sym) = STATIC_TRANSFORM_NAME (SYMBOL_NAME (sym));
- SYMBOL_VALUE_ADDRESS (sym) = SYMBOL_VALUE_ADDRESS (msym);
- }
- }
- #endif
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- if (os9k_stabs)
- add_symbol_to_list (sym, &global_symbols);
- else
- add_symbol_to_list (sym, &local_symbols);
- break;
-
- case 'v':
- /* Reference parameter */
- SYMBOL_TYPE (sym) = read_type (&p, objfile);
- SYMBOL_CLASS (sym) = LOC_REF_ARG;
- SYMBOL_VALUE (sym) = valu;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &local_symbols);
- break;
-
- case 'a':
- /* Reference parameter which is in a register. */
- SYMBOL_TYPE (sym) = read_type (&p, objfile);
- SYMBOL_CLASS (sym) = LOC_REGPARM_ADDR;
- SYMBOL_VALUE (sym) = STAB_REG_TO_REGNUM (valu);
- if (SYMBOL_VALUE (sym) >= NUM_REGS)
- {
- complain (®_value_complaint, SYMBOL_SOURCE_NAME (sym));
- SYMBOL_VALUE (sym) = SP_REGNUM; /* Known safe, though useless */
- }
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &local_symbols);
- break;
-
- case 'X':
- /* This is used by Sun FORTRAN for "function result value".
- Sun claims ("dbx and dbxtool interfaces", 2nd ed)
- that Pascal uses it too, but when I tried it Pascal used
- "x:3" (local symbol) instead. */
- SYMBOL_TYPE (sym) = read_type (&p, objfile);
- SYMBOL_CLASS (sym) = LOC_LOCAL;
- SYMBOL_VALUE (sym) = valu;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &local_symbols);
- break;
-
- default:
- SYMBOL_TYPE (sym) = error_type (&p);
- SYMBOL_CLASS (sym) = LOC_CONST;
- SYMBOL_VALUE (sym) = 0;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &file_symbols);
- break;
- }
-
- /* When passing structures to a function, some systems sometimes pass
- the address in a register, not the structure itself.
-
- If REG_STRUCT_HAS_ADDR yields non-zero we have to convert LOC_REGPARM
- to LOC_REGPARM_ADDR for structures and unions. */
-
- if (SYMBOL_CLASS (sym) == LOC_REGPARM
- && REG_STRUCT_HAS_ADDR (processing_gcc_compilation,
- SYMBOL_TYPE (sym))
- && ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT)
- || (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_UNION)))
- SYMBOL_CLASS (sym) = LOC_REGPARM_ADDR;
-
- /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th and
- subsequent arguments on the sparc, for example). */
- if (SYMBOL_CLASS (sym) == LOC_ARG
- && REG_STRUCT_HAS_ADDR (processing_gcc_compilation,
- SYMBOL_TYPE (sym))
- && ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT)
- || (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_UNION)))
- SYMBOL_CLASS (sym) = LOC_REF_ARG;
-
- return sym;
- }
-
-
- /* Skip rest of this symbol and return an error type.
-
- General notes on error recovery: error_type always skips to the
- end of the symbol (modulo cretinous dbx symbol name continuation).
- Thus code like this:
-
- if (*(*pp)++ != ';')
- return error_type (pp);
-
- is wrong because if *pp starts out pointing at '\0' (typically as the
- result of an earlier error), it will be incremented to point to the
- start of the next symbol, which might produce strange results, at least
- if you run off the end of the string table. Instead use
-
- if (**pp != ';')
- return error_type (pp);
- ++*pp;
-
- or
-
- if (**pp != ';')
- foo = error_type (pp);
- else
- ++*pp;
-
- And in case it isn't obvious, the point of all this hair is so the compiler
- can define new types and new syntaxes, and old versions of the
- debugger will be able to read the new symbol tables. */
-
- static struct type *
- error_type (pp)
- char **pp;
- {
- complain (&error_type_complaint);
- while (1)
- {
- /* Skip to end of symbol. */
- while (**pp != '\0')
- {
- (*pp)++;
- }
-
- /* Check for and handle cretinous dbx symbol name continuation! */
- if ((*pp)[-1] == '\\' || (*pp)[-1] == '?')
- {
- *pp = next_symbol_text ();
- }
- else
- {
- break;
- }
- }
- return (builtin_type_error);
- }
-
-
- /* Read type information or a type definition; return the type. Even
- though this routine accepts either type information or a type
- definition, the distinction is relevant--some parts of stabsread.c
- assume that type information starts with a digit, '-', or '(' in
- deciding whether to call read_type. */
-
- struct type *
- read_type (pp, objfile)
- register char **pp;
- struct objfile *objfile;
- {
- register struct type *type = 0;
- struct type *type1;
- int typenums[2];
- int xtypenums[2];
- char type_descriptor;
-
- /* Size in bits of type if specified by a type attribute, or -1 if
- there is no size attribute. */
- int type_size = -1;
-
- /* Used to distinguish string and bitstring from char-array and set. */
- int is_string = 0;
-
- /* Read type number if present. The type number may be omitted.
- for instance in a two-dimensional array declared with type
- "ar1;1;10;ar1;1;10;4". */
- if ((**pp >= '0' && **pp <= '9')
- || **pp == '('
- || **pp == '-')
- {
- if (read_type_number (pp, typenums) != 0)
- return error_type (pp);
-
- /* Type is not being defined here. Either it already exists,
- or this is a forward reference to it. dbx_alloc_type handles
- both cases. */
- if (**pp != '=')
- return dbx_alloc_type (typenums, objfile);
-
- /* Type is being defined here. */
- /* Skip the '='. */
- ++(*pp);
-
- while (**pp == '@')
- {
- char *p = *pp + 1;
- /* It might be a type attribute or a member type. */
- if (isdigit (*p) || *p == '(' || *p == '-')
- /* Member type. */
- break;
- else
- {
- /* Type attributes. */
- char *attr = p;
-
- /* Skip to the semicolon. */
- while (*p != ';' && *p != '\0')
- ++p;
- *pp = p;
- if (*p == '\0')
- return error_type (pp);
- else
- /* Skip the semicolon. */
- ++*pp;
-
- switch (*attr)
- {
- case 's':
- type_size = atoi (attr + 1);
- if (type_size <= 0)
- type_size = -1;
- break;
-
- case 'S':
- is_string = 1;
- break;
-
- default:
- /* Ignore unrecognized type attributes, so future compilers
- can invent new ones. */
- break;
- }
- }
- }
- /* Skip the type descriptor, we get it below with (*pp)[-1]. */
- ++(*pp);
- }
- else
- {
- /* 'typenums=' not present, type is anonymous. Read and return
- the definition, but don't put it in the type vector. */
- typenums[0] = typenums[1] = -1;
- (*pp)++;
- }
-
- type_descriptor = (*pp)[-1];
- switch (type_descriptor)
- {
- case 'x':
- {
- enum type_code code;
-
- /* Used to index through file_symbols. */
- struct pending *ppt;
- int i;
-
- /* Name including "struct", etc. */
- char *type_name;
-
- {
- char *from, *to, *p, *q1, *q2;
-
- /* Set the type code according to the following letter. */
- switch ((*pp)[0])
- {
- case 's':
- code = TYPE_CODE_STRUCT;
- break;
- case 'u':
- code = TYPE_CODE_UNION;
- break;
- case 'e':
- code = TYPE_CODE_ENUM;
- break;
- default:
- {
- /* Complain and keep going, so compilers can invent new
- cross-reference types. */
- static struct complaint msg =
- {"Unrecognized cross-reference type `%c'", 0, 0};
- complain (&msg, (*pp)[0]);
- code = TYPE_CODE_STRUCT;
- break;
- }
- }
-
- q1 = strchr(*pp, '<');
- p = strchr(*pp, ':');
- if (p == NULL)
- return error_type (pp);
- while (q1 && p > q1 && p[1] == ':')
- {
- q2 = strchr(q1, '>');
- if (!q2 || q2 < p)
- break;
- p += 2;
- p = strchr(p, ':');
- if (p == NULL)
- return error_type (pp);
- }
- to = type_name =
- (char *)obstack_alloc (&objfile->type_obstack, p - *pp + 1);
-
- /* Copy the name. */
- from = *pp + 1;
- while (from < p)
- *to++ = *from++;
- *to = '\0';
-
- /* Set the pointer ahead of the name which we just read, and
- the colon. */
- *pp = from + 1;
- }
-
- /* Now check to see whether the type has already been
- declared. This was written for arrays of cross-referenced
- types before we had TYPE_CODE_TARGET_STUBBED, so I'm pretty
- sure it is not necessary anymore. But it might be a good
- idea, to save a little memory. */
-
- for (ppt = file_symbols; ppt; ppt = ppt->next)
- for (i = 0; i < ppt->nsyms; i++)
- {
- struct symbol *sym = ppt->symbol[i];
-
- if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
- && SYMBOL_NAMESPACE (sym) == STRUCT_NAMESPACE
- && (TYPE_CODE (SYMBOL_TYPE (sym)) == code)
- && STREQ (SYMBOL_NAME (sym), type_name))
- {
- obstack_free (&objfile -> type_obstack, type_name);
- type = SYMBOL_TYPE (sym);
- return type;
- }
- }
-
- /* Didn't find the type to which this refers, so we must
- be dealing with a forward reference. Allocate a type
- structure for it, and keep track of it so we can
- fill in the rest of the fields when we get the full
- type. */
- type = dbx_alloc_type (typenums, objfile);
- TYPE_CODE (type) = code;
- TYPE_TAG_NAME (type) = type_name;
- INIT_CPLUS_SPECIFIC(type);
- TYPE_FLAGS (type) |= TYPE_FLAG_STUB;
-
- add_undefined_type (type);
- return type;
- }
-
- case '-': /* RS/6000 built-in type */
- case '0':
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- case '8':
- case '9':
- case '(':
-
- {
- char *pp_saved;
-
- (*pp)--;
- pp_saved = *pp;
-
- /* Peek ahead at the number to detect void. */
- if (read_type_number (pp, xtypenums) != 0)
- return error_type (pp);
-
- if (typenums[0] == xtypenums[0] && typenums[1] == xtypenums[1])
- /* It's being defined as itself. That means it is "void". */
- type = init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
- else
- {
- struct type *xtype;
-
- /* Go back to the number and have read_type get it. This means
- that we can deal with something like t(1,2)=(3,4)=... which
- the Lucid compiler uses. */
- *pp = pp_saved;
- xtype = read_type (pp, objfile);
-
- /* The type is being defined to another type. So we copy the type.
- This loses if we copy a C++ class and so we lose track of how
- the names are mangled (but g++ doesn't output stabs like this
- now anyway). */
-
- type = alloc_type (objfile);
- memcpy (type, xtype, sizeof (struct type));
-
- /* The idea behind clearing the names is that the only purpose
- for defining a type to another type is so that the name of
- one can be different. So we probably don't need to worry much
- about the case where the compiler doesn't give a name to the
- new type. */
- TYPE_NAME (type) = NULL;
- TYPE_TAG_NAME (type) = NULL;
- }
- if (typenums[0] != -1)
- *dbx_lookup_type (typenums) = type;
- break;
- }
-
- /* In the following types, we must be sure to overwrite any existing
- type that the typenums refer to, rather than allocating a new one
- and making the typenums point to the new one. This is because there
- may already be pointers to the existing type (if it had been
- forward-referenced), and we must change it to a pointer, function,
- reference, or whatever, *in-place*. */
-
- case '*':
- type1 = read_type (pp, objfile);
- type = make_pointer_type (type1, dbx_lookup_type (typenums));
- break;
-
- case '&': /* Reference to another type */
- type1 = read_type (pp, objfile);
- type = make_reference_type (type1, dbx_lookup_type (typenums));
- break;
-
- case 'f': /* Function returning another type */
- if (os9k_stabs && **pp == '(')
- {
- /* Function prototype; parse it.
- We must conditionalize this on os9k_stabs because otherwise
- it could be confused with a Sun-style (1,3) typenumber
- (I think). */
- struct type *t;
- ++*pp;
- while (**pp != ')')
- {
- t = read_type(pp, objfile);
- if (**pp == ',') ++*pp;
- }
- }
- type1 = read_type (pp, objfile);
- type = make_function_type (type1, dbx_lookup_type (typenums));
- break;
-
- case 'k': /* Const qualifier on some type (Sun) */
- case 'c': /* Const qualifier on some type (OS9000) */
- /* Because 'c' means other things to AIX and 'k' is perfectly good,
- only accept 'c' in the os9k_stabs case. */
- if (type_descriptor == 'c' && !os9k_stabs)
- return error_type (pp);
- type = read_type (pp, objfile);
- /* FIXME! For now, we ignore const and volatile qualifiers. */
- break;
-
- case 'B': /* Volatile qual on some type (Sun) */
- case 'i': /* Volatile qual on some type (OS9000) */
- /* Because 'i' means other things to AIX and 'B' is perfectly good,
- only accept 'i' in the os9k_stabs case. */
- if (type_descriptor == 'i' && !os9k_stabs)
- return error_type (pp);
- type = read_type (pp, objfile);
- /* FIXME! For now, we ignore const and volatile qualifiers. */
- break;
-
- /* FIXME -- we should be doing smash_to_XXX types here. */
- case '@': /* Member (class & variable) type */
- {
- struct type *domain = read_type (pp, objfile);
- struct type *memtype;
-
- if (**pp != ',')
- /* Invalid member type data format. */
- return error_type (pp);
- ++*pp;
-
- memtype = read_type (pp, objfile);
- type = dbx_alloc_type (typenums, objfile);
- smash_to_member_type (type, domain, memtype);
- }
- break;
-
- case '#': /* Method (class & fn) type */
- if ((*pp)[0] == '#')
- {
- /* We'll get the parameter types from the name. */
- struct type *return_type;
-
- (*pp)++;
- return_type = read_type (pp, objfile);
- if (*(*pp)++ != ';')
- complain (&invalid_member_complaint, symnum);
- type = allocate_stub_method (return_type);
- if (typenums[0] != -1)
- *dbx_lookup_type (typenums) = type;
- }
- else
- {
- struct type *domain = read_type (pp, objfile);
- struct type *return_type;
- struct type **args;
-
- if (**pp != ',')
- /* Invalid member type data format. */
- return error_type (pp);
- else
- ++(*pp);
-
- return_type = read_type (pp, objfile);
- args = read_args (pp, ';', objfile);
- type = dbx_alloc_type (typenums, objfile);
- smash_to_method_type (type, domain, return_type, args);
- }
- break;
-
- case 'r': /* Range type */
- type = read_range_type (pp, typenums, objfile);
- if (typenums[0] != -1)
- *dbx_lookup_type (typenums) = type;
- break;
-
- case 'b':
- if (os9k_stabs)
- /* Const and volatile qualified type. */
- type = read_type (pp, objfile);
- else
- {
- /* Sun ACC builtin int type */
- type = read_sun_builtin_type (pp, typenums, objfile);
- if (typenums[0] != -1)
- *dbx_lookup_type (typenums) = type;
- }
- break;
-
- case 'R': /* Sun ACC builtin float type */
- type = read_sun_floating_type (pp, typenums, objfile);
- if (typenums[0] != -1)
- *dbx_lookup_type (typenums) = type;
- break;
-
- case 'e': /* Enumeration type */
- type = dbx_alloc_type (typenums, objfile);
- type = read_enum_type (pp, type, objfile);
- if (typenums[0] != -1)
- *dbx_lookup_type (typenums) = type;
- break;
-
- case 's': /* Struct type */
- case 'u': /* Union type */
- type = dbx_alloc_type (typenums, objfile);
- if (!TYPE_NAME (type))
- {
- TYPE_NAME (type) = type_synonym_name;
- }
- type_synonym_name = NULL;
- switch (type_descriptor)
- {
- case 's':
- TYPE_CODE (type) = TYPE_CODE_STRUCT;
- break;
- case 'u':
- TYPE_CODE (type) = TYPE_CODE_UNION;
- break;
- }
- type = read_struct_type (pp, type, objfile);
- break;
-
- case 'a': /* Array type */
- if (**pp != 'r')
- return error_type (pp);
- ++*pp;
-
- type = dbx_alloc_type (typenums, objfile);
- type = read_array_type (pp, type, objfile);
- if (is_string)
- TYPE_CODE (type) = TYPE_CODE_STRING;
- break;
-
- case 'S':
- type1 = read_type (pp, objfile);
- type = create_set_type ((struct type*) NULL, type1);
- if (is_string)
- TYPE_CODE (type) = TYPE_CODE_BITSTRING;
- if (typenums[0] != -1)
- *dbx_lookup_type (typenums) = type;
- break;
-
- default:
- --*pp; /* Go back to the symbol in error */
- /* Particularly important if it was \0! */
- return error_type (pp);
- }
-
- if (type == 0)
- {
- warning ("GDB internal error, type is NULL in stabsread.c\n");
- return error_type (pp);
- }
-
- /* Size specified in a type attribute overrides any other size. */
- if (type_size != -1)
- TYPE_LENGTH (type) = (type_size + TARGET_CHAR_BIT - 1) / TARGET_CHAR_BIT;
-
- return type;
- }
-
- /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
- Return the proper type node for a given builtin type number. */
-
- static struct type *
- rs6000_builtin_type (typenum)
- int typenum;
- {
- /* We recognize types numbered from -NUMBER_RECOGNIZED to -1. */
- #define NUMBER_RECOGNIZED 30
- /* This includes an empty slot for type number -0. */
- static struct type *negative_types[NUMBER_RECOGNIZED + 1];
- struct type *rettype = NULL;
-
- if (typenum >= 0 || typenum < -NUMBER_RECOGNIZED)
- {
- complain (&rs6000_builtin_complaint, typenum);
- return builtin_type_error;
- }
- if (negative_types[-typenum] != NULL)
- return negative_types[-typenum];
-
- #if TARGET_CHAR_BIT != 8
- #error This code wrong for TARGET_CHAR_BIT not 8
- /* These definitions all assume that TARGET_CHAR_BIT is 8. I think
- that if that ever becomes not true, the correct fix will be to
- make the size in the struct type to be in bits, not in units of
- TARGET_CHAR_BIT. */
- #endif
-
- switch (-typenum)
- {
- case 1:
- /* The size of this and all the other types are fixed, defined
- by the debugging format. If there is a type called "int" which
- is other than 32 bits, then it should use a new negative type
- number (or avoid negative type numbers for that case).
- See stabs.texinfo. */
- rettype = init_type (TYPE_CODE_INT, 4, 0, "int", NULL);
- break;
- case 2:
- rettype = init_type (TYPE_CODE_INT, 1, 0, "char", NULL);
- break;
- case 3:
- rettype = init_type (TYPE_CODE_INT, 2, 0, "short", NULL);
- break;
- case 4:
- rettype = init_type (TYPE_CODE_INT, 4, 0, "long", NULL);
- break;
- case 5:
- rettype = init_type (TYPE_CODE_INT, 1, TYPE_FLAG_UNSIGNED,
- "unsigned char", NULL);
- break;
- case 6:
- rettype = init_type (TYPE_CODE_INT, 1, 0, "signed char", NULL);
- break;
- case 7:
- rettype = init_type (TYPE_CODE_INT, 2, TYPE_FLAG_UNSIGNED,
- "unsigned short", NULL);
- break;
- case 8:
- rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
- "unsigned int", NULL);
- break;
- case 9:
- rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
- "unsigned", NULL);
- case 10:
- rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
- "unsigned long", NULL);
- break;
- case 11:
- rettype = init_type (TYPE_CODE_VOID, 1, 0, "void", NULL);
- break;
- case 12:
- /* IEEE single precision (32 bit). */
- rettype = init_type (TYPE_CODE_FLT, 4, 0, "float", NULL);
- break;
- case 13:
- /* IEEE double precision (64 bit). */
- rettype = init_type (TYPE_CODE_FLT, 8, 0, "double", NULL);
- break;
- case 14:
- /* This is an IEEE double on the RS/6000, and different machines with
- different sizes for "long double" should use different negative
- type numbers. See stabs.texinfo. */
- rettype = init_type (TYPE_CODE_FLT, 8, 0, "long double", NULL);
- break;
- case 15:
- rettype = init_type (TYPE_CODE_INT, 4, 0, "integer", NULL);
- break;
- case 16:
- rettype = init_type (TYPE_CODE_BOOL, 4, 0, "boolean", NULL);
- break;
- case 17:
- rettype = init_type (TYPE_CODE_FLT, 4, 0, "short real", NULL);
- break;
- case 18:
- rettype = init_type (TYPE_CODE_FLT, 8, 0, "real", NULL);
- break;
- case 19:
- rettype = init_type (TYPE_CODE_ERROR, 0, 0, "stringptr", NULL);
- break;
- case 20:
- rettype = init_type (TYPE_CODE_CHAR, 1, TYPE_FLAG_UNSIGNED,
- "character", NULL);
- break;
- case 21:
- rettype = init_type (TYPE_CODE_BOOL, 1, TYPE_FLAG_UNSIGNED,
- "logical*1", NULL);
- break;
- case 22:
- rettype = init_type (TYPE_CODE_BOOL, 2, TYPE_FLAG_UNSIGNED,
- "logical*2", NULL);
- break;
- case 23:
- rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
- "logical*4", NULL);
- break;
- case 24:
- rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
- "logical", NULL);
- break;
- case 25:
- /* Complex type consisting of two IEEE single precision values. */
- rettype = init_type (TYPE_CODE_ERROR, 8, 0, "complex", NULL);
- break;
- case 26:
- /* Complex type consisting of two IEEE double precision values. */
- rettype = init_type (TYPE_CODE_ERROR, 16, 0, "double complex", NULL);
- break;
- case 27:
- rettype = init_type (TYPE_CODE_INT, 1, 0, "integer*1", NULL);
- break;
- case 28:
- rettype = init_type (TYPE_CODE_INT, 2, 0, "integer*2", NULL);
- break;
- case 29:
- rettype = init_type (TYPE_CODE_INT, 4, 0, "integer*4", NULL);
- break;
- case 30:
- rettype = init_type (TYPE_CODE_CHAR, 2, 0, "wchar", NULL);
- break;
- }
- negative_types[-typenum] = rettype;
- return rettype;
- }
-
- /* This page contains subroutines of read_type. */
-
- #define VISIBILITY_PRIVATE '0' /* Stabs character for private field */
- #define VISIBILITY_PROTECTED '1' /* Stabs character for protected fld */
- #define VISIBILITY_PUBLIC '2' /* Stabs character for public field */
- #define VISIBILITY_IGNORE '9' /* Optimized out or zero length */
-
- /* Read member function stabs info for C++ classes. The form of each member
- function data is:
-
- NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
-
- An example with two member functions is:
-
- afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
-
- For the case of overloaded operators, the format is op$::*.funcs, where
- $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
- name (such as `+=') and `.' marks the end of the operator name.
-
- Returns 1 for success, 0 for failure. */
-
- static int
- read_member_functions (fip, pp, type, objfile)
- struct field_info *fip;
- char **pp;
- struct type *type;
- struct objfile *objfile;
- {
- int nfn_fields = 0;
- int length = 0;
- /* Total number of member functions defined in this class. If the class
- defines two `f' functions, and one `g' function, then this will have
- the value 3. */
- int total_length = 0;
- int i;
- struct next_fnfield
- {
- struct next_fnfield *next;
- struct fn_field fn_field;
- } *sublist;
- struct type *look_ahead_type;
- struct next_fnfieldlist *new_fnlist;
- struct next_fnfield *new_sublist;
- char *main_fn_name;
- register char *p;
-
- /* Process each list until we find something that is not a member function
- or find the end of the functions. */
-
- while (**pp != ';')
- {
- /* We should be positioned at the start of the function name.
- Scan forward to find the first ':' and if it is not the
- first of a "::" delimiter, then this is not a member function. */
- p = *pp;
- while (*p != ':')
- {
- p++;
- }
- if (p[1] != ':')
- {
- break;
- }
-
- sublist = NULL;
- look_ahead_type = NULL;
- length = 0;
-
- new_fnlist = (struct next_fnfieldlist *)
- xmalloc (sizeof (struct next_fnfieldlist));
- make_cleanup (free, new_fnlist);
- memset (new_fnlist, 0, sizeof (struct next_fnfieldlist));
-
- if ((*pp)[0] == 'o' && (*pp)[1] == 'p' && (*pp)[2] == CPLUS_MARKER)
- {
- /* This is a completely wierd case. In order to stuff in the
- names that might contain colons (the usual name delimiter),
- Mike Tiemann defined a different name format which is
- signalled if the identifier is "op$". In that case, the
- format is "op$::XXXX." where XXXX is the name. This is
- used for names like "+" or "=". YUUUUUUUK! FIXME! */
- /* This lets the user type "break operator+".
- We could just put in "+" as the name, but that wouldn't
- work for "*". */
- static char opname[32] = {'o', 'p', CPLUS_MARKER};
- char *o = opname + 3;
-
- /* Skip past '::'. */
- *pp = p + 2;
-
- STABS_CONTINUE (pp);
- p = *pp;
- while (*p != '.')
- {
- *o++ = *p++;
- }
- main_fn_name = savestring (opname, o - opname);
- /* Skip past '.' */
- *pp = p + 1;
- }
- else
- {
- main_fn_name = savestring (*pp, p - *pp);
- /* Skip past '::'. */
- *pp = p + 2;
- }
- new_fnlist -> fn_fieldlist.name = main_fn_name;
-
- do
- {
- new_sublist =
- (struct next_fnfield *) xmalloc (sizeof (struct next_fnfield));
- make_cleanup (free, new_sublist);
- memset (new_sublist, 0, sizeof (struct next_fnfield));
-
- /* Check for and handle cretinous dbx symbol name continuation! */
- if (look_ahead_type == NULL)
- {
- /* Normal case. */
- STABS_CONTINUE (pp);
-
- new_sublist -> fn_field.type = read_type (pp, objfile);
- if (**pp != ':')
- {
- /* Invalid symtab info for member function. */
- return 0;
- }
- }
- else
- {
- /* g++ version 1 kludge */
- new_sublist -> fn_field.type = look_ahead_type;
- look_ahead_type = NULL;
- }
-
- (*pp)++;
- p = *pp;
- while (*p != ';')
- {
- p++;
- }
-
- /* If this is just a stub, then we don't have the real name here. */
-
- if (TYPE_FLAGS (new_sublist -> fn_field.type) & TYPE_FLAG_STUB)
- {
- if (!TYPE_DOMAIN_TYPE (new_sublist -> fn_field.type))
- TYPE_DOMAIN_TYPE (new_sublist -> fn_field.type) = type;
- new_sublist -> fn_field.is_stub = 1;
- }
- new_sublist -> fn_field.physname = savestring (*pp, p - *pp);
- *pp = p + 1;
-
- /* Set this member function's visibility fields. */
- switch (*(*pp)++)
- {
- case VISIBILITY_PRIVATE:
- new_sublist -> fn_field.is_private = 1;
- break;
- case VISIBILITY_PROTECTED:
- new_sublist -> fn_field.is_protected = 1;
- break;
- }
-
- STABS_CONTINUE (pp);
- switch (**pp)
- {
- case 'A': /* Normal functions. */
- new_sublist -> fn_field.is_const = 0;
- new_sublist -> fn_field.is_volatile = 0;
- (*pp)++;
- break;
- case 'B': /* `const' member functions. */
- new_sublist -> fn_field.is_const = 1;
- new_sublist -> fn_field.is_volatile = 0;
- (*pp)++;
- break;
- case 'C': /* `volatile' member function. */
- new_sublist -> fn_field.is_const = 0;
- new_sublist -> fn_field.is_volatile = 1;
- (*pp)++;
- break;
- case 'D': /* `const volatile' member function. */
- new_sublist -> fn_field.is_const = 1;
- new_sublist -> fn_field.is_volatile = 1;
- (*pp)++;
- break;
- case '*': /* File compiled with g++ version 1 -- no info */
- case '?':
- case '.':
- break;
- default:
- complain (&const_vol_complaint, **pp);
- break;
- }
-
- switch (*(*pp)++)
- {
- case '*':
- {
- int nbits;
- /* virtual member function, followed by index.
- The sign bit is set to distinguish pointers-to-methods
- from virtual function indicies. Since the array is
- in words, the quantity must be shifted left by 1
- on 16 bit machine, and by 2 on 32 bit machine, forcing
- the sign bit out, and usable as a valid index into
- the array. Remove the sign bit here. */
- new_sublist -> fn_field.voffset =
- (0x7fffffff & read_huge_number (pp, ';', &nbits)) + 2;
- if (nbits != 0)
- return 0;
-
- STABS_CONTINUE (pp);
- if (**pp == ';' || **pp == '\0')
- {
- /* Must be g++ version 1. */
- new_sublist -> fn_field.fcontext = 0;
- }
- else
- {
- /* Figure out from whence this virtual function came.
- It may belong to virtual function table of
- one of its baseclasses. */
- look_ahead_type = read_type (pp, objfile);
- if (**pp == ':')
- {
- /* g++ version 1 overloaded methods. */
- }
- else
- {
- new_sublist -> fn_field.fcontext = look_ahead_type;
- if (**pp != ';')
- {
- return 0;
- }
- else
- {
- ++*pp;
- }
- look_ahead_type = NULL;
- }
- }
- break;
- }
- case '?':
- /* static member function. */
- new_sublist -> fn_field.voffset = VOFFSET_STATIC;
- if (strncmp (new_sublist -> fn_field.physname,
- main_fn_name, strlen (main_fn_name)))
- {
- new_sublist -> fn_field.is_stub = 1;
- }
- break;
-
- default:
- /* error */
- complain (&member_fn_complaint, (*pp)[-1]);
- /* Fall through into normal member function. */
-
- case '.':
- /* normal member function. */
- new_sublist -> fn_field.voffset = 0;
- new_sublist -> fn_field.fcontext = 0;
- break;
- }
-
- new_sublist -> next = sublist;
- sublist = new_sublist;
- length++;
- STABS_CONTINUE (pp);
- }
- while (**pp != ';' && **pp != '\0');
-
- (*pp)++;
-
- new_fnlist -> fn_fieldlist.fn_fields = (struct fn_field *)
- obstack_alloc (&objfile -> type_obstack,
- sizeof (struct fn_field) * length);
- memset (new_fnlist -> fn_fieldlist.fn_fields, 0,
- sizeof (struct fn_field) * length);
- for (i = length; (i--, sublist); sublist = sublist -> next)
- {
- new_fnlist -> fn_fieldlist.fn_fields[i] = sublist -> fn_field;
- }
-
- new_fnlist -> fn_fieldlist.length = length;
- new_fnlist -> next = fip -> fnlist;
- fip -> fnlist = new_fnlist;
- nfn_fields++;
- total_length += length;
- STABS_CONTINUE (pp);
- }
-
- if (nfn_fields)
- {
- ALLOCATE_CPLUS_STRUCT_TYPE (type);
- TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
- TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * nfn_fields);
- memset (TYPE_FN_FIELDLISTS (type), 0,
- sizeof (struct fn_fieldlist) * nfn_fields);
- TYPE_NFN_FIELDS (type) = nfn_fields;
- TYPE_NFN_FIELDS_TOTAL (type) = total_length;
- }
-
- return 1;
- }
-
- /* Special GNU C++ name.
-
- Returns 1 for success, 0 for failure. "failure" means that we can't
- keep parsing and it's time for error_type(). */
-
- static int
- read_cpp_abbrev (fip, pp, type, objfile)
- struct field_info *fip;
- char **pp;
- struct type *type;
- struct objfile *objfile;
- {
- register char *p;
- char *name;
- char cpp_abbrev;
- struct type *context;
-
- p = *pp;
- if (*++p == 'v')
- {
- name = NULL;
- cpp_abbrev = *++p;
-
- *pp = p + 1;
-
- /* At this point, *pp points to something like "22:23=*22...",
- where the type number before the ':' is the "context" and
- everything after is a regular type definition. Lookup the
- type, find it's name, and construct the field name. */
-
- context = read_type (pp, objfile);
-
- switch (cpp_abbrev)
- {
- case 'f': /* $vf -- a virtual function table pointer */
- fip->list->field.name =
- obconcat (&objfile->type_obstack, vptr_name, "", "");
- break;
-
- case 'b': /* $vb -- a virtual bsomethingorother */
- name = type_name_no_tag (context);
- if (name == NULL)
- {
- complain (&invalid_cpp_type_complaint, symnum);
- name = "FOO";
- }
- fip->list->field.name =
- obconcat (&objfile->type_obstack, vb_name, name, "");
- break;
-
- default:
- complain (&invalid_cpp_abbrev_complaint, *pp);
- fip->list->field.name =
- obconcat (&objfile->type_obstack,
- "INVALID_CPLUSPLUS_ABBREV", "", "");
- break;
- }
-
- /* At this point, *pp points to the ':'. Skip it and read the
- field type. */
-
- p = ++(*pp);
- if (p[-1] != ':')
- {
- complain (&invalid_cpp_abbrev_complaint, *pp);
- return 0;
- }
- fip->list->field.type = read_type (pp, objfile);
- if (**pp == ',')
- (*pp)++; /* Skip the comma. */
- else
- return 0;
-
- {
- int nbits;
- fip->list->field.bitpos = read_huge_number (pp, ';', &nbits);
- if (nbits != 0)
- return 0;
- }
- /* This field is unpacked. */
- fip->list->field.bitsize = 0;
- fip->list->visibility = VISIBILITY_PRIVATE;
- }
- else
- {
- complain (&invalid_cpp_abbrev_complaint, *pp);
- /* We have no idea what syntax an unrecognized abbrev would have, so
- better return 0. If we returned 1, we would need to at least advance
- *pp to avoid an infinite loop. */
- return 0;
- }
- return 1;
- }
-
- static void
- read_one_struct_field (fip, pp, p, type, objfile)
- struct field_info *fip;
- char **pp;
- char *p;
- struct type *type;
- struct objfile *objfile;
- {
- fip -> list -> field.name =
- obsavestring (*pp, p - *pp, &objfile -> type_obstack);
- *pp = p + 1;
-
- /* This means we have a visibility for a field coming. */
- if (**pp == '/')
- {
- (*pp)++;
- fip -> list -> visibility = *(*pp)++;
- }
- else
- {
- /* normal dbx-style format, no explicit visibility */
- fip -> list -> visibility = VISIBILITY_PUBLIC;
- }
-
- fip -> list -> field.type = read_type (pp, objfile);
- if (**pp == ':')
- {
- p = ++(*pp);
- #if 0
- /* Possible future hook for nested types. */
- if (**pp == '!')
- {
- fip -> list -> field.bitpos = (long)-2; /* nested type */
- p = ++(*pp);
- }
- else
- #endif
- {
- /* Static class member. */
- fip -> list -> field.bitpos = (long) -1;
- }
- while (*p != ';')
- {
- p++;
- }
- fip -> list -> field.bitsize = (long) savestring (*pp, p - *pp);
- *pp = p + 1;
- return;
- }
- else if (**pp != ',')
- {
- /* Bad structure-type format. */
- complain (&stabs_general_complaint, "bad structure-type format");
- return;
- }
-
- (*pp)++; /* Skip the comma. */
-
- {
- int nbits;
- fip -> list -> field.bitpos = read_huge_number (pp, ',', &nbits);
- if (nbits != 0)
- {
- complain (&stabs_general_complaint, "bad structure-type format");
- return;
- }
- fip -> list -> field.bitsize = read_huge_number (pp, ';', &nbits);
- if (nbits != 0)
- {
- complain (&stabs_general_complaint, "bad structure-type format");
- return;
- }
- }
-
- if (fip -> list -> field.bitpos == 0 && fip -> list -> field.bitsize == 0)
- {
- /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
- it is a field which has been optimized out. The correct stab for
- this case is to use VISIBILITY_IGNORE, but that is a recent
- invention. (2) It is a 0-size array. For example
- union { int num; char str[0]; } foo. Printing "<no value>" for
- str in "p foo" is OK, since foo.str (and thus foo.str[3])
- will continue to work, and a 0-size array as a whole doesn't
- have any contents to print.
-
- I suspect this probably could also happen with gcc -gstabs (not
- -gstabs+) for static fields, and perhaps other C++ extensions.
- Hopefully few people use -gstabs with gdb, since it is intended
- for dbx compatibility. */
-
- /* Ignore this field. */
- fip -> list-> visibility = VISIBILITY_IGNORE;
- }
- else
- {
- /* Detect an unpacked field and mark it as such.
- dbx gives a bit size for all fields.
- Note that forward refs cannot be packed,
- and treat enums as if they had the width of ints. */
-
- if (TYPE_CODE (fip -> list -> field.type) != TYPE_CODE_INT
- && TYPE_CODE (fip -> list -> field.type) != TYPE_CODE_ENUM)
- {
- fip -> list -> field.bitsize = 0;
- }
- if ((fip -> list -> field.bitsize
- == TARGET_CHAR_BIT * TYPE_LENGTH (fip -> list -> field.type)
- || (TYPE_CODE (fip -> list -> field.type) == TYPE_CODE_ENUM
- && (fip -> list -> field.bitsize
- == TARGET_INT_BIT)
- )
- )
- &&
- fip -> list -> field.bitpos % 8 == 0)
- {
- fip -> list -> field.bitsize = 0;
- }
- }
- }
-
-
- /* Read struct or class data fields. They have the form:
-
- NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
-
- At the end, we see a semicolon instead of a field.
-
- In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
- a static field.
-
- The optional VISIBILITY is one of:
-
- '/0' (VISIBILITY_PRIVATE)
- '/1' (VISIBILITY_PROTECTED)
- '/2' (VISIBILITY_PUBLIC)
- '/9' (VISIBILITY_IGNORE)
-
- or nothing, for C style fields with public visibility.
-
- Returns 1 for success, 0 for failure. */
-
- static int
- read_struct_fields (fip, pp, type, objfile)
- struct field_info *fip;
- char **pp;
- struct type *type;
- struct objfile *objfile;
- {
- register char *p;
- struct nextfield *new;
-
- /* We better set p right now, in case there are no fields at all... */
-
- p = *pp;
-
- /* Read each data member type until we find the terminating ';' at the end of
- the data member list, or break for some other reason such as finding the
- start of the member function list. */
-
- while (**pp != ';')
- {
- if (os9k_stabs && **pp == ',') break;
- STABS_CONTINUE (pp);
- /* Get space to record the next field's data. */
- new = (struct nextfield *) xmalloc (sizeof (struct nextfield));
- make_cleanup (free, new);
- memset (new, 0, sizeof (struct nextfield));
- new -> next = fip -> list;
- fip -> list = new;
-
- /* Get the field name. */
- p = *pp;
-
- /* If is starts with CPLUS_MARKER it is a special abbreviation,
- unless the CPLUS_MARKER is followed by an underscore, in
- which case it is just the name of an anonymous type, which we
- should handle like any other type name. We accept either '$'
- or '.', because a field name can never contain one of these
- characters except as a CPLUS_MARKER (we probably should be
- doing that in most parts of GDB). */
-
- if ((*p == '$' || *p == '.') && p[1] != '_')
- {
- if (!read_cpp_abbrev (fip, pp, type, objfile))
- return 0;
- continue;
- }
-
- /* Look for the ':' that separates the field name from the field
- values. Data members are delimited by a single ':', while member
- functions are delimited by a pair of ':'s. When we hit the member
- functions (if any), terminate scan loop and return. */
-
- while (*p != ':' && *p != '\0')
- {
- p++;
- }
- if (*p == '\0')
- return 0;
-
- /* Check to see if we have hit the member functions yet. */
- if (p[1] == ':')
- {
- break;
- }
- read_one_struct_field (fip, pp, p, type, objfile);
- }
- if (p[0] == ':' && p[1] == ':')
- {
- /* chill the list of fields: the last entry (at the head) is a
- partially constructed entry which we now scrub. */
- fip -> list = fip -> list -> next;
- }
- return 1;
- }
-
- /* The stabs for C++ derived classes contain baseclass information which
- is marked by a '!' character after the total size. This function is
- called when we encounter the baseclass marker, and slurps up all the
- baseclass information.
-
- Immediately following the '!' marker is the number of base classes that
- the class is derived from, followed by information for each base class.
- For each base class, there are two visibility specifiers, a bit offset
- to the base class information within the derived class, a reference to
- the type for the base class, and a terminating semicolon.
-
- A typical example, with two base classes, would be "!2,020,19;0264,21;".
- ^^ ^ ^ ^ ^ ^ ^
- Baseclass information marker __________________|| | | | | | |
- Number of baseclasses __________________________| | | | | | |
- Visibility specifiers (2) ________________________| | | | | |
- Offset in bits from start of class _________________| | | | |
- Type number for base class ___________________________| | | |
- Visibility specifiers (2) _______________________________| | |
- Offset in bits from start of class ________________________| |
- Type number of base class ____________________________________|
-
- Return 1 for success, 0 for (error-type-inducing) failure. */
-
- static int
- read_baseclasses (fip, pp, type, objfile)
- struct field_info *fip;
- char **pp;
- struct type *type;
- struct objfile *objfile;
- {
- int i;
- struct nextfield *new;
-
- if (**pp != '!')
- {
- return 1;
- }
- else
- {
- /* Skip the '!' baseclass information marker. */
- (*pp)++;
- }
-
- ALLOCATE_CPLUS_STRUCT_TYPE (type);
- {
- int nbits;
- TYPE_N_BASECLASSES (type) = read_huge_number (pp, ',', &nbits);
- if (nbits != 0)
- return 0;
- }
-
- #if 0
- /* Some stupid compilers have trouble with the following, so break
- it up into simpler expressions. */
- TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *)
- TYPE_ALLOC (type, B_BYTES (TYPE_N_BASECLASSES (type)));
- #else
- {
- int num_bytes = B_BYTES (TYPE_N_BASECLASSES (type));
- char *pointer;
-
- pointer = (char *) TYPE_ALLOC (type, num_bytes);
- TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer;
- }
- #endif /* 0 */
-
- B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type));
-
- for (i = 0; i < TYPE_N_BASECLASSES (type); i++)
- {
- new = (struct nextfield *) xmalloc (sizeof (struct nextfield));
- make_cleanup (free, new);
- memset (new, 0, sizeof (struct nextfield));
- new -> next = fip -> list;
- fip -> list = new;
- new -> field.bitsize = 0; /* this should be an unpacked field! */
-
- STABS_CONTINUE (pp);
- switch (**pp)
- {
- case '0':
- /* Nothing to do. */
- break;
- case '1':
- SET_TYPE_FIELD_VIRTUAL (type, i);
- break;
- default:
- /* Unknown character. Complain and treat it as non-virtual. */
- {
- static struct complaint msg = {
- "Unknown virtual character `%c' for baseclass", 0, 0};
- complain (&msg, **pp);
- }
- }
- ++(*pp);
-
- new -> visibility = *(*pp)++;
- switch (new -> visibility)
- {
- case VISIBILITY_PRIVATE:
- case VISIBILITY_PROTECTED:
- case VISIBILITY_PUBLIC:
- break;
- default:
- /* Bad visibility format. Complain and treat it as
- public. */
- {
- static struct complaint msg = {
- "Unknown visibility `%c' for baseclass", 0, 0};
- complain (&msg, new -> visibility);
- new -> visibility = VISIBILITY_PUBLIC;
- }
- }
-
- {
- int nbits;
-
- /* The remaining value is the bit offset of the portion of the object
- corresponding to this baseclass. Always zero in the absence of
- multiple inheritance. */
-
- new -> field.bitpos = read_huge_number (pp, ',', &nbits);
- if (nbits != 0)
- return 0;
- }
-
- /* The last piece of baseclass information is the type of the
- base class. Read it, and remember it's type name as this
- field's name. */
-
- new -> field.type = read_type (pp, objfile);
- new -> field.name = type_name_no_tag (new -> field.type);
-
- /* skip trailing ';' and bump count of number of fields seen */
- if (**pp == ';')
- (*pp)++;
- else
- return 0;
- }
- return 1;
- }
-
- /* The tail end of stabs for C++ classes that contain a virtual function
- pointer contains a tilde, a %, and a type number.
- The type number refers to the base class (possibly this class itself) which
- contains the vtable pointer for the current class.
-
- This function is called when we have parsed all the method declarations,
- so we can look for the vptr base class info. */
-
- static int
- read_tilde_fields (fip, pp, type, objfile)
- struct field_info *fip;
- char **pp;
- struct type *type;
- struct objfile *objfile;
- {
- register char *p;
-
- STABS_CONTINUE (pp);
-
- /* If we are positioned at a ';', then skip it. */
- if (**pp == ';')
- {
- (*pp)++;
- }
-
- if (**pp == '~')
- {
- (*pp)++;
-
- if (**pp == '=' || **pp == '+' || **pp == '-')
- {
- /* Obsolete flags that used to indicate the presence
- of constructors and/or destructors. */
- (*pp)++;
- }
-
- /* Read either a '%' or the final ';'. */
- if (*(*pp)++ == '%')
- {
- /* The next number is the type number of the base class
- (possibly our own class) which supplies the vtable for
- this class. Parse it out, and search that class to find
- its vtable pointer, and install those into TYPE_VPTR_BASETYPE
- and TYPE_VPTR_FIELDNO. */
-
- struct type *t;
- int i;
-
- t = read_type (pp, objfile);
- p = (*pp)++;
- while (*p != '\0' && *p != ';')
- {
- p++;
- }
- if (*p == '\0')
- {
- /* Premature end of symbol. */
- return 0;
- }
-
- TYPE_VPTR_BASETYPE (type) = t;
- if (type == t) /* Our own class provides vtbl ptr */
- {
- for (i = TYPE_NFIELDS (t) - 1;
- i >= TYPE_N_BASECLASSES (t);
- --i)
- {
- if (! strncmp (TYPE_FIELD_NAME (t, i), vptr_name,
- sizeof (vptr_name) - 1))
- {
- TYPE_VPTR_FIELDNO (type) = i;
- goto gotit;
- }
- }
- /* Virtual function table field not found. */
- complain (&vtbl_notfound_complaint, TYPE_NAME (type));
- return 0;
- }
- else
- {
- TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
- }
-
- gotit:
- *pp = p + 1;
- }
- }
- return 1;
- }
-
- static int
- attach_fn_fields_to_type (fip, type)
- struct field_info *fip;
- register struct type *type;
- {
- register int n;
-
- for (n = TYPE_NFN_FIELDS (type);
- fip -> fnlist != NULL;
- fip -> fnlist = fip -> fnlist -> next)
- {
- --n; /* Circumvent Sun3 compiler bug */
- TYPE_FN_FIELDLISTS (type)[n] = fip -> fnlist -> fn_fieldlist;
- }
- return 1;
- }
-
- /* Create the vector of fields, and record how big it is.
- We need this info to record proper virtual function table information
- for this class's virtual functions. */
-
- static int
- attach_fields_to_type (fip, type, objfile)
- struct field_info *fip;
- register struct type *type;
- struct objfile *objfile;
- {
- register int nfields = 0;
- register int non_public_fields = 0;
- register struct nextfield *scan;
-
- /* Count up the number of fields that we have, as well as taking note of
- whether or not there are any non-public fields, which requires us to
- allocate and build the private_field_bits and protected_field_bits
- bitfields. */
-
- for (scan = fip -> list; scan != NULL; scan = scan -> next)
- {
- nfields++;
- if (scan -> visibility != VISIBILITY_PUBLIC)
- {
- non_public_fields++;
- }
- }
-
- /* Now we know how many fields there are, and whether or not there are any
- non-public fields. Record the field count, allocate space for the
- array of fields, and create blank visibility bitfields if necessary. */
-
- TYPE_NFIELDS (type) = nfields;
- TYPE_FIELDS (type) = (struct field *)
- TYPE_ALLOC (type, sizeof (struct field) * nfields);
- memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);
-
- if (non_public_fields)
- {
- ALLOCATE_CPLUS_STRUCT_TYPE (type);
-
- TYPE_FIELD_PRIVATE_BITS (type) =
- (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
- B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);
-
- TYPE_FIELD_PROTECTED_BITS (type) =
- (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
- B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);
-
- TYPE_FIELD_IGNORE_BITS (type) =
- (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
- B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
- }
-
- /* Copy the saved-up fields into the field vector. Start from the head
- of the list, adding to the tail of the field array, so that they end
- up in the same order in the array in which they were added to the list. */
-
- while (nfields-- > 0)
- {
- TYPE_FIELD (type, nfields) = fip -> list -> field;
- switch (fip -> list -> visibility)
- {
- case VISIBILITY_PRIVATE:
- SET_TYPE_FIELD_PRIVATE (type, nfields);
- break;
-
- case VISIBILITY_PROTECTED:
- SET_TYPE_FIELD_PROTECTED (type, nfields);
- break;
-
- case VISIBILITY_IGNORE:
- SET_TYPE_FIELD_IGNORE (type, nfields);
- break;
-
- case VISIBILITY_PUBLIC:
- break;
-
- default:
- /* Unknown visibility. Complain and treat it as public. */
- {
- static struct complaint msg = {
- "Unknown visibility `%c' for field", 0, 0};
- complain (&msg, fip -> list -> visibility);
- }
- break;
- }
- fip -> list = fip -> list -> next;
- }
- return 1;
- }
-
- /* Read the description of a structure (or union type) and return an object
- describing the type.
-
- PP points to a character pointer that points to the next unconsumed token
- in the the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
- *PP will point to "4a:1,0,32;;".
-
- TYPE points to an incomplete type that needs to be filled in.
-
- OBJFILE points to the current objfile from which the stabs information is
- being read. (Note that it is redundant in that TYPE also contains a pointer
- to this same objfile, so it might be a good idea to eliminate it. FIXME).
- */
-
- static struct type *
- read_struct_type (pp, type, objfile)
- char **pp;
- struct type *type;
- struct objfile *objfile;
- {
- struct cleanup *back_to;
- struct field_info fi;
-
- fi.list = NULL;
- fi.fnlist = NULL;
-
- back_to = make_cleanup (null_cleanup, 0);
-
- INIT_CPLUS_SPECIFIC (type);
- TYPE_FLAGS (type) &= ~TYPE_FLAG_STUB;
-
- /* First comes the total size in bytes. */
-
- {
- int nbits;
- TYPE_LENGTH (type) = read_huge_number (pp, 0, &nbits);
- if (nbits != 0)
- return error_type (pp);
- }
-
- /* Now read the baseclasses, if any, read the regular C struct or C++
- class member fields, attach the fields to the type, read the C++
- member functions, attach them to the type, and then read any tilde
- field (baseclass specifier for the class holding the main vtable). */
-
- if (!read_baseclasses (&fi, pp, type, objfile)
- || !read_struct_fields (&fi, pp, type, objfile)
- || !attach_fields_to_type (&fi, type, objfile)
- || !read_member_functions (&fi, pp, type, objfile)
- || !attach_fn_fields_to_type (&fi, type)
- || !read_tilde_fields (&fi, pp, type, objfile))
- {
- do_cleanups (back_to);
- return (error_type (pp));
- }
-
- do_cleanups (back_to);
- return (type);
- }
-
- /* Read a definition of an array type,
- and create and return a suitable type object.
- Also creates a range type which represents the bounds of that
- array. */
-
- static struct type *
- read_array_type (pp, type, objfile)
- register char **pp;
- register struct type *type;
- struct objfile *objfile;
- {
- struct type *index_type, *element_type, *range_type;
- int lower, upper;
- int adjustable = 0;
- int nbits;
-
- /* Format of an array type:
- "ar<index type>;lower;upper;<array_contents_type>".
- OS9000: "arlower,upper;<array_contents_type>".
-
- Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
- for these, produce a type like float[][]. */
-
- if (os9k_stabs)
- index_type = builtin_type_int;
- else
- {
- index_type = read_type (pp, objfile);
- if (**pp != ';')
- /* Improper format of array type decl. */
- return error_type (pp);
- ++*pp;
- }
-
- if (!(**pp >= '0' && **pp <= '9') && **pp != '-')
- {
- (*pp)++;
- adjustable = 1;
- }
- lower = read_huge_number (pp, os9k_stabs ? ',' : ';', &nbits);
- if (nbits != 0)
- return error_type (pp);
-
- if (!(**pp >= '0' && **pp <= '9') && **pp != '-')
- {
- (*pp)++;
- adjustable = 1;
- }
- upper = read_huge_number (pp, ';', &nbits);
- if (nbits != 0)
- return error_type (pp);
-
- element_type = read_type (pp, objfile);
-
- if (adjustable)
- {
- lower = 0;
- upper = -1;
- }
-
- range_type =
- create_range_type ((struct type *) NULL, index_type, lower, upper);
- type = create_array_type (type, element_type, range_type);
-
- /* If we have an array whose element type is not yet known, but whose
- bounds *are* known, record it to be adjusted at the end of the file. */
-
- if ((TYPE_FLAGS (element_type) & TYPE_FLAG_STUB) && !adjustable)
- {
- TYPE_FLAGS (type) |= TYPE_FLAG_TARGET_STUB;
- add_undefined_type (type);
- }
-
- return type;
- }
-
-
- /* Read a definition of an enumeration type,
- and create and return a suitable type object.
- Also defines the symbols that represent the values of the type. */
-
- static struct type *
- read_enum_type (pp, type, objfile)
- register char **pp;
- register struct type *type;
- struct objfile *objfile;
- {
- register char *p;
- char *name;
- register long n;
- register struct symbol *sym;
- int nsyms = 0;
- struct pending **symlist;
- struct pending *osyms, *syms;
- int o_nsyms;
- int nbits;
-
- #if 0
- /* FIXME! The stabs produced by Sun CC merrily define things that ought
- to be file-scope, between N_FN entries, using N_LSYM. What's a mother
- to do? For now, force all enum values to file scope. */
- if (within_function)
- symlist = &local_symbols;
- else
- #endif
- symlist = &file_symbols;
- osyms = *symlist;
- o_nsyms = osyms ? osyms->nsyms : 0;
-
- if (os9k_stabs)
- {
- /* Size. Perhaps this does not have to be conditionalized on
- os9k_stabs (assuming the name of an enum constant can't start
- with a digit). */
- read_huge_number (pp, 0, &nbits);
- if (nbits != 0)
- return error_type (pp);
- }
-
- /* Read the value-names and their values.
- The input syntax is NAME:VALUE,NAME:VALUE, and so on.
- A semicolon or comma instead of a NAME means the end. */
- while (**pp && **pp != ';' && **pp != ',')
- {
- STABS_CONTINUE (pp);
- p = *pp;
- while (*p != ':') p++;
- name = obsavestring (*pp, p - *pp, &objfile -> symbol_obstack);
- *pp = p + 1;
- n = read_huge_number (pp, ',', &nbits);
- if (nbits != 0)
- return error_type (pp);
-
- sym = (struct symbol *)
- obstack_alloc (&objfile -> symbol_obstack, sizeof (struct symbol));
- memset (sym, 0, sizeof (struct symbol));
- SYMBOL_NAME (sym) = name;
- SYMBOL_LANGUAGE (sym) = current_subfile -> language;
- SYMBOL_CLASS (sym) = LOC_CONST;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- SYMBOL_VALUE (sym) = n;
- add_symbol_to_list (sym, symlist);
- nsyms++;
- }
-
- if (**pp == ';')
- (*pp)++; /* Skip the semicolon. */
-
- /* Now fill in the fields of the type-structure. */
-
- TYPE_LENGTH (type) = TARGET_INT_BIT / HOST_CHAR_BIT;
- TYPE_CODE (type) = TYPE_CODE_ENUM;
- TYPE_FLAGS (type) &= ~TYPE_FLAG_STUB;
- TYPE_NFIELDS (type) = nsyms;
- TYPE_FIELDS (type) = (struct field *)
- TYPE_ALLOC (type, sizeof (struct field) * nsyms);
- memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nsyms);
-
- /* Find the symbols for the values and put them into the type.
- The symbols can be found in the symlist that we put them on
- to cause them to be defined. osyms contains the old value
- of that symlist; everything up to there was defined by us. */
- /* Note that we preserve the order of the enum constants, so
- that in something like "enum {FOO, LAST_THING=FOO}" we print
- FOO, not LAST_THING. */
-
- for (syms = *symlist, n = nsyms - 1; ; syms = syms->next)
- {
- int last = syms == osyms ? o_nsyms : 0;
- int j = syms->nsyms;
- for (; --j >= last; --n)
- {
- struct symbol *xsym = syms->symbol[j];
- SYMBOL_TYPE (xsym) = type;
- TYPE_FIELD_NAME (type, n) = SYMBOL_NAME (xsym);
- TYPE_FIELD_VALUE (type, n) = 0;
- TYPE_FIELD_BITPOS (type, n) = SYMBOL_VALUE (xsym);
- TYPE_FIELD_BITSIZE (type, n) = 0;
- }
- if (syms == osyms)
- break;
- }
-
- return type;
- }
-
- /* Sun's ACC uses a somewhat saner method for specifying the builtin
- typedefs in every file (for int, long, etc):
-
- type = b <signed> <width>; <offset>; <nbits>
- signed = u or s. Possible c in addition to u or s (for char?).
- offset = offset from high order bit to start bit of type.
- width is # bytes in object of this type, nbits is # bits in type.
-
- The width/offset stuff appears to be for small objects stored in
- larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
- FIXME. */
-
- static struct type *
- read_sun_builtin_type (pp, typenums, objfile)
- char **pp;
- int typenums[2];
- struct objfile *objfile;
- {
- int type_bits;
- int nbits;
- int signed_type;
-
- switch (**pp)
- {
- case 's':
- signed_type = 1;
- break;
- case 'u':
- signed_type = 0;
- break;
- default:
- return error_type (pp);
- }
- (*pp)++;
-
- /* For some odd reason, all forms of char put a c here. This is strange
- because no other type has this honor. We can safely ignore this because
- we actually determine 'char'acterness by the number of bits specified in
- the descriptor. */
-
- if (**pp == 'c')
- (*pp)++;
-
- /* The first number appears to be the number of bytes occupied
- by this type, except that unsigned short is 4 instead of 2.
- Since this information is redundant with the third number,
- we will ignore it. */
- read_huge_number (pp, ';', &nbits);
- if (nbits != 0)
- return error_type (pp);
-
- /* The second number is always 0, so ignore it too. */
- read_huge_number (pp, ';', &nbits);
- if (nbits != 0)
- return error_type (pp);
-
- /* The third number is the number of bits for this type. */
- type_bits = read_huge_number (pp, 0, &nbits);
- if (nbits != 0)
- return error_type (pp);
- /* The type *should* end with a semicolon. If it are embedded
- in a larger type the semicolon may be the only way to know where
- the type ends. If this type is at the end of the stabstring we
- can deal with the omitted semicolon (but we don't have to like
- it). Don't bother to complain(), Sun's compiler omits the semicolon
- for "void". */
- if (**pp == ';')
- ++(*pp);
-
- if (type_bits == 0)
- return init_type (TYPE_CODE_VOID, 1,
- signed_type ? 0 : TYPE_FLAG_UNSIGNED, (char *)NULL,
- objfile);
- else
- return init_type (TYPE_CODE_INT,
- type_bits / TARGET_CHAR_BIT,
- signed_type ? 0 : TYPE_FLAG_UNSIGNED, (char *)NULL,
- objfile);
- }
-
- static struct type *
- read_sun_floating_type (pp, typenums, objfile)
- char **pp;
- int typenums[2];
- struct objfile *objfile;
- {
- int nbits;
- int details;
- int nbytes;
-
- /* The first number has more details about the type, for example
- FN_COMPLEX. */
- details = read_huge_number (pp, ';', &nbits);
- if (nbits != 0)
- return error_type (pp);
-
- /* The second number is the number of bytes occupied by this type */
- nbytes = read_huge_number (pp, ';', &nbits);
- if (nbits != 0)
- return error_type (pp);
-
- if (details == NF_COMPLEX || details == NF_COMPLEX16
- || details == NF_COMPLEX32)
- /* This is a type we can't handle, but we do know the size.
- We also will be able to give it a name. */
- return init_type (TYPE_CODE_ERROR, nbytes, 0, NULL, objfile);
-
- return init_type (TYPE_CODE_FLT, nbytes, 0, NULL, objfile);
- }
-
- /* Read a number from the string pointed to by *PP.
- The value of *PP is advanced over the number.
- If END is nonzero, the character that ends the
- number must match END, or an error happens;
- and that character is skipped if it does match.
- If END is zero, *PP is left pointing to that character.
-
- If the number fits in a long, set *BITS to 0 and return the value.
- If not, set *BITS to be the number of bits in the number and return 0.
-
- If encounter garbage, set *BITS to -1 and return 0. */
-
- static long
- read_huge_number (pp, end, bits)
- char **pp;
- int end;
- int *bits;
- {
- char *p = *pp;
- int sign = 1;
- long n = 0;
- int radix = 10;
- char overflow = 0;
- int nbits = 0;
- int c;
- long upper_limit;
-
- if (*p == '-')
- {
- sign = -1;
- p++;
- }
-
- /* Leading zero means octal. GCC uses this to output values larger
- than an int (because that would be hard in decimal). */
- if (*p == '0')
- {
- radix = 8;
- p++;
- }
-
- if (os9k_stabs)
- upper_limit = ULONG_MAX / radix;
- else
- upper_limit = LONG_MAX / radix;
-
- while ((c = *p++) >= '0' && c < ('0' + radix))
- {
- if (n <= upper_limit)
- {
- n *= radix;
- n += c - '0'; /* FIXME this overflows anyway */
- }
- else
- overflow = 1;
-
- /* This depends on large values being output in octal, which is
- what GCC does. */
- if (radix == 8)
- {
- if (nbits == 0)
- {
- if (c == '0')
- /* Ignore leading zeroes. */
- ;
- else if (c == '1')
- nbits = 1;
- else if (c == '2' || c == '3')
- nbits = 2;
- else
- nbits = 3;
- }
- else
- nbits += 3;
- }
- }
- if (end)
- {
- if (c && c != end)
- {
- if (bits != NULL)
- *bits = -1;
- return 0;
- }
- }
- else
- --p;
-
- *pp = p;
- if (overflow)
- {
- if (nbits == 0)
- {
- /* Large decimal constants are an error (because it is hard to
- count how many bits are in them). */
- if (bits != NULL)
- *bits = -1;
- return 0;
- }
-
- /* -0x7f is the same as 0x80. So deal with it by adding one to
- the number of bits. */
- if (sign == -1)
- ++nbits;
- if (bits)
- *bits = nbits;
- }
- else
- {
- if (bits)
- *bits = 0;
- return n * sign;
- }
- /* It's *BITS which has the interesting information. */
- return 0;
- }
-
- static struct type *
- read_range_type (pp, typenums, objfile)
- char **pp;
- int typenums[2];
- struct objfile *objfile;
- {
- int rangenums[2];
- long n2, n3;
- int n2bits, n3bits;
- int self_subrange;
- struct type *result_type;
- struct type *index_type;
-
- /* First comes a type we are a subrange of.
- In C it is usually 0, 1 or the type being defined. */
- /* FIXME: according to stabs.texinfo and AIX doc, this can be a type-id
- not just a type number. */
- if (read_type_number (pp, rangenums) != 0)
- return error_type (pp);
- self_subrange = (rangenums[0] == typenums[0] &&
- rangenums[1] == typenums[1]);
-
- /* A semicolon should now follow; skip it. */
- if (**pp == ';')
- (*pp)++;
-
- /* The remaining two operands are usually lower and upper bounds
- of the range. But in some special cases they mean something else. */
- n2 = read_huge_number (pp, ';', &n2bits);
- n3 = read_huge_number (pp, ';', &n3bits);
-
- if (n2bits == -1 || n3bits == -1)
- return error_type (pp);
-
- /* If limits are huge, must be large integral type. */
- if (n2bits != 0 || n3bits != 0)
- {
- char got_signed = 0;
- char got_unsigned = 0;
- /* Number of bits in the type. */
- int nbits = 0;
-
- /* Range from 0 to <large number> is an unsigned large integral type. */
- if ((n2bits == 0 && n2 == 0) && n3bits != 0)
- {
- got_unsigned = 1;
- nbits = n3bits;
- }
- /* Range from <large number> to <large number>-1 is a large signed
- integral type. Take care of the case where <large number> doesn't
- fit in a long but <large number>-1 does. */
- else if ((n2bits != 0 && n3bits != 0 && n2bits == n3bits + 1)
- || (n2bits != 0 && n3bits == 0
- && (n2bits == sizeof (long) * HOST_CHAR_BIT)
- && n3 == LONG_MAX))
- {
- got_signed = 1;
- nbits = n2bits;
- }
-
- if (got_signed || got_unsigned)
- {
- return init_type (TYPE_CODE_INT, nbits / TARGET_CHAR_BIT,
- got_unsigned ? TYPE_FLAG_UNSIGNED : 0, NULL,
- objfile);
- }
- else
- return error_type (pp);
- }
-
- /* A type defined as a subrange of itself, with bounds both 0, is void. */
- if (self_subrange && n2 == 0 && n3 == 0)
- return init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);
-
- /* If n3 is zero and n2 is not, we want a floating type,
- and n2 is the width in bytes.
-
- Fortran programs appear to use this for complex types also,
- and they give no way to distinguish between double and single-complex!
-
- GDB does not have complex types.
-
- Just return the complex as a float of that size. It won't work right
- for the complex values, but at least it makes the file loadable. */
-
- if (n3 == 0 && n2 > 0)
- {
- return init_type (TYPE_CODE_FLT, n2, 0, NULL, objfile);
- }
-
- /* If the upper bound is -1, it must really be an unsigned int. */
-
- else if (n2 == 0 && n3 == -1)
- {
- /* It is unsigned int or unsigned long. */
- /* GCC 2.3.3 uses this for long long too, but that is just a GDB 3.5
- compatibility hack. */
- return init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
- TYPE_FLAG_UNSIGNED, NULL, objfile);
- }
-
- /* Special case: char is defined (Who knows why) as a subrange of
- itself with range 0-127. */
- else if (self_subrange && n2 == 0 && n3 == 127)
- return init_type (TYPE_CODE_INT, 1, 0, NULL, objfile);
-
- /* We used to do this only for subrange of self or subrange of int. */
- else if (n2 == 0)
- {
- if (n3 < 0)
- /* n3 actually gives the size. */
- return init_type (TYPE_CODE_INT, - n3, TYPE_FLAG_UNSIGNED,
- NULL, objfile);
- if (n3 == 0xff)
- return init_type (TYPE_CODE_INT, 1, TYPE_FLAG_UNSIGNED, NULL, objfile);
- if (n3 == 0xffff)
- return init_type (TYPE_CODE_INT, 2, TYPE_FLAG_UNSIGNED, NULL, objfile);
-
- /* -1 is used for the upper bound of (4 byte) "unsigned int" and
- "unsigned long", and we already checked for that,
- so don't need to test for it here. */
- }
- /* I think this is for Convex "long long". Since I don't know whether
- Convex sets self_subrange, I also accept that particular size regardless
- of self_subrange. */
- else if (n3 == 0 && n2 < 0
- && (self_subrange
- || n2 == - TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT))
- return init_type (TYPE_CODE_INT, - n2, 0, NULL, objfile);
- else if (n2 == -n3 -1)
- {
- if (n3 == 0x7f)
- return init_type (TYPE_CODE_INT, 1, 0, NULL, objfile);
- if (n3 == 0x7fff)
- return init_type (TYPE_CODE_INT, 2, 0, NULL, objfile);
- if (n3 == 0x7fffffff)
- return init_type (TYPE_CODE_INT, 4, 0, NULL, objfile);
- }
-
- /* We have a real range type on our hands. Allocate space and
- return a real pointer. */
-
- /* At this point I don't have the faintest idea how to deal with
- a self_subrange type; I'm going to assume that this is used
- as an idiom, and that all of them are special cases. So . . . */
- if (self_subrange)
- return error_type (pp);
-
- index_type = *dbx_lookup_type (rangenums);
- if (index_type == NULL)
- {
- /* Does this actually ever happen? Is that why we are worrying
- about dealing with it rather than just calling error_type? */
-
- static struct type *range_type_index;
-
- complain (&range_type_base_complaint, rangenums[1]);
- if (range_type_index == NULL)
- range_type_index =
- init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
- 0, "range type index type", NULL);
- index_type = range_type_index;
- }
-
- result_type = create_range_type ((struct type *) NULL, index_type, n2, n3);
- return (result_type);
- }
-
- /* Read in an argument list. This is a list of types, separated by commas
- and terminated with END. Return the list of types read in, or (struct type
- **)-1 if there is an error. */
-
- static struct type **
- read_args (pp, end, objfile)
- char **pp;
- int end;
- struct objfile *objfile;
- {
- /* FIXME! Remove this arbitrary limit! */
- struct type *types[1024], **rval; /* allow for fns of 1023 parameters */
- int n = 0;
-
- while (**pp != end)
- {
- if (**pp != ',')
- /* Invalid argument list: no ','. */
- return (struct type **)-1;
- (*pp)++;
- STABS_CONTINUE (pp);
- types[n++] = read_type (pp, objfile);
- }
- (*pp)++; /* get past `end' (the ':' character) */
-
- if (n == 1)
- {
- rval = (struct type **) xmalloc (2 * sizeof (struct type *));
- }
- else if (TYPE_CODE (types[n-1]) != TYPE_CODE_VOID)
- {
- rval = (struct type **) xmalloc ((n + 1) * sizeof (struct type *));
- memset (rval + n, 0, sizeof (struct type *));
- }
- else
- {
- rval = (struct type **) xmalloc (n * sizeof (struct type *));
- }
- memcpy (rval, types, n * sizeof (struct type *));
- return rval;
- }
-
- /* Common block handling. */
-
- /* List of symbols declared since the last BCOMM. This list is a tail
- of local_symbols. When ECOMM is seen, the symbols on the list
- are noted so their proper addresses can be filled in later,
- using the common block base address gotten from the assembler
- stabs. */
-
- static struct pending *common_block;
- static int common_block_i;
-
- /* Name of the current common block. We get it from the BCOMM instead of the
- ECOMM to match IBM documentation (even though IBM puts the name both places
- like everyone else). */
- static char *common_block_name;
-
- /* Process a N_BCOMM symbol. The storage for NAME is not guaranteed
- to remain after this function returns. */
-
- void
- common_block_start (name, objfile)
- char *name;
- struct objfile *objfile;
- {
- if (common_block_name != NULL)
- {
- static struct complaint msg = {
- "Invalid symbol data: common block within common block",
- 0, 0};
- complain (&msg);
- }
- common_block = local_symbols;
- common_block_i = local_symbols ? local_symbols->nsyms : 0;
- common_block_name = obsavestring (name, strlen (name),
- &objfile -> symbol_obstack);
- }
-
- /* Process a N_ECOMM symbol. */
-
- void
- common_block_end (objfile)
- struct objfile *objfile;
- {
- /* Symbols declared since the BCOMM are to have the common block
- start address added in when we know it. common_block and
- common_block_i point to the first symbol after the BCOMM in
- the local_symbols list; copy the list and hang it off the
- symbol for the common block name for later fixup. */
- int i;
- struct symbol *sym;
- struct pending *new = 0;
- struct pending *next;
- int j;
-
- if (common_block_name == NULL)
- {
- static struct complaint msg = {"ECOMM symbol unmatched by BCOMM", 0, 0};
- complain (&msg);
- return;
- }
-
- sym = (struct symbol *)
- obstack_alloc (&objfile -> symbol_obstack, sizeof (struct symbol));
- memset (sym, 0, sizeof (struct symbol));
- SYMBOL_NAME (sym) = common_block_name;
- SYMBOL_CLASS (sym) = LOC_BLOCK;
-
- /* Now we copy all the symbols which have been defined since the BCOMM. */
-
- /* Copy all the struct pendings before common_block. */
- for (next = local_symbols;
- next != NULL && next != common_block;
- next = next->next)
- {
- for (j = 0; j < next->nsyms; j++)
- add_symbol_to_list (next->symbol[j], &new);
- }
-
- /* Copy however much of COMMON_BLOCK we need. If COMMON_BLOCK is
- NULL, it means copy all the local symbols (which we already did
- above). */
-
- if (common_block != NULL)
- for (j = common_block_i; j < common_block->nsyms; j++)
- add_symbol_to_list (common_block->symbol[j], &new);
-
- SYMBOL_TYPE (sym) = (struct type *) new;
-
- /* Should we be putting local_symbols back to what it was?
- Does it matter? */
-
- i = hashname (SYMBOL_NAME (sym));
- SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
- global_sym_chain[i] = sym;
- common_block_name = NULL;
- }
-
- /* Add a common block's start address to the offset of each symbol
- declared to be in it (by being between a BCOMM/ECOMM pair that uses
- the common block name). */
-
- static void
- fix_common_block (sym, valu)
- struct symbol *sym;
- int valu;
- {
- struct pending *next = (struct pending *) SYMBOL_TYPE (sym);
- for ( ; next; next = next->next)
- {
- register int j;
- for (j = next->nsyms - 1; j >= 0; j--)
- SYMBOL_VALUE_ADDRESS (next->symbol[j]) += valu;
- }
- }
-
-
-
- /* What about types defined as forward references inside of a small lexical
- scope? */
- /* Add a type to the list of undefined types to be checked through
- once this file has been read in. */
-
- void
- add_undefined_type (type)
- struct type *type;
- {
- if (undef_types_length == undef_types_allocated)
- {
- undef_types_allocated *= 2;
- undef_types = (struct type **)
- xrealloc ((char *) undef_types,
- undef_types_allocated * sizeof (struct type *));
- }
- undef_types[undef_types_length++] = type;
- }
-
- /* Go through each undefined type, see if it's still undefined, and fix it
- up if possible. We have two kinds of undefined types:
-
- TYPE_CODE_ARRAY: Array whose target type wasn't defined yet.
- Fix: update array length using the element bounds
- and the target type's length.
- TYPE_CODE_STRUCT, TYPE_CODE_UNION: Structure whose fields were not
- yet defined at the time a pointer to it was made.
- Fix: Do a full lookup on the struct/union tag. */
- void
- cleanup_undefined_types ()
- {
- struct type **type;
-
- for (type = undef_types; type < undef_types + undef_types_length; type++)
- {
- switch (TYPE_CODE (*type))
- {
-
- case TYPE_CODE_STRUCT:
- case TYPE_CODE_UNION:
- case TYPE_CODE_ENUM:
- {
- /* Check if it has been defined since. Need to do this here
- as well as in check_stub_type to deal with the (legitimate in
- C though not C++) case of several types with the same name
- in different source files. */
- if (TYPE_FLAGS (*type) & TYPE_FLAG_STUB)
- {
- struct pending *ppt;
- int i;
- /* Name of the type, without "struct" or "union" */
- char *typename = TYPE_TAG_NAME (*type);
-
- if (typename == NULL)
- {
- static struct complaint msg = {"need a type name", 0, 0};
- complain (&msg);
- break;
- }
- for (ppt = file_symbols; ppt; ppt = ppt->next)
- {
- for (i = 0; i < ppt->nsyms; i++)
- {
- struct symbol *sym = ppt->symbol[i];
-
- if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
- && SYMBOL_NAMESPACE (sym) == STRUCT_NAMESPACE
- && (TYPE_CODE (SYMBOL_TYPE (sym)) ==
- TYPE_CODE (*type))
- && STREQ (SYMBOL_NAME (sym), typename))
- {
- memcpy (*type, SYMBOL_TYPE (sym),
- sizeof (struct type));
- }
- }
- }
- }
- }
- break;
-
- case TYPE_CODE_ARRAY:
- {
- /* This is a kludge which is here for historical reasons
- because I suspect that check_stub_type does not get
- called everywhere it needs to be called for arrays. Even
- with this kludge, those places are broken for the case
- where the stub type is defined in another compilation
- unit, but this kludge at least deals with it for the case
- in which it is the same compilation unit.
-
- Don't try to do this by calling check_stub_type; it might
- cause symbols to be read in lookup_symbol, and the symbol
- reader is not reentrant. */
-
- struct type *range_type;
- int lower, upper;
-
- if (TYPE_LENGTH (*type) != 0) /* Better be unknown */
- goto badtype;
- if (TYPE_NFIELDS (*type) != 1)
- goto badtype;
- range_type = TYPE_FIELD_TYPE (*type, 0);
- if (TYPE_CODE (range_type) != TYPE_CODE_RANGE)
- goto badtype;
-
- /* Now recompute the length of the array type, based on its
- number of elements and the target type's length. */
- lower = TYPE_FIELD_BITPOS (range_type, 0);
- upper = TYPE_FIELD_BITPOS (range_type, 1);
- TYPE_LENGTH (*type) = (upper - lower + 1)
- * TYPE_LENGTH (TYPE_TARGET_TYPE (*type));
-
- /* If the target type is not a stub, we could be clearing
- TYPE_FLAG_TARGET_STUB for *type. */
- }
- break;
-
- default:
- badtype:
- {
- static struct complaint msg = {"\
- GDB internal error. cleanup_undefined_types with bad type %d.", 0, 0};
- complain (&msg, TYPE_CODE (*type));
- }
- break;
- }
- }
-
- undef_types_length = 0;
- }
-
- /* Scan through all of the global symbols defined in the object file,
- assigning values to the debugging symbols that need to be assigned
- to. Get these symbols from the minimal symbol table.
- Return 1 if there might still be unresolved debugging symbols, else 0. */
-
- static int scan_file_globals_1 PARAMS ((struct objfile *));
-
- static int
- scan_file_globals_1 (objfile)
- struct objfile *objfile;
- {
- int hash;
- struct minimal_symbol *msymbol;
- struct symbol *sym, *prev;
-
- /* Avoid expensive loop through all minimal symbols if there are
- no unresolved symbols. */
- for (hash = 0; hash < HASHSIZE; hash++)
- {
- if (global_sym_chain[hash])
- break;
- }
- if (hash >= HASHSIZE)
- return 0;
-
- if (objfile->msymbols == 0) /* Beware the null file. */
- return 1;
-
- for (msymbol = objfile -> msymbols; SYMBOL_NAME (msymbol) != NULL; msymbol++)
- {
- QUIT;
-
- /* Skip static symbols. */
- switch (MSYMBOL_TYPE (msymbol))
- {
- case mst_file_text:
- case mst_file_data:
- case mst_file_bss:
- continue;
- default:
- break;
- }
-
- prev = NULL;
-
- /* Get the hash index and check all the symbols
- under that hash index. */
-
- hash = hashname (SYMBOL_NAME (msymbol));
-
- for (sym = global_sym_chain[hash]; sym;)
- {
- if (SYMBOL_NAME (msymbol)[0] == SYMBOL_NAME (sym)[0] &&
- STREQ(SYMBOL_NAME (msymbol) + 1, SYMBOL_NAME (sym) + 1))
- {
- /* Splice this symbol out of the hash chain and
- assign the value we have to it. */
- if (prev)
- {
- SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym);
- }
- else
- {
- global_sym_chain[hash] = SYMBOL_VALUE_CHAIN (sym);
- }
-
- /* Check to see whether we need to fix up a common block. */
- /* Note: this code might be executed several times for
- the same symbol if there are multiple references. */
-
- if (SYMBOL_CLASS (sym) == LOC_BLOCK)
- {
- fix_common_block (sym, SYMBOL_VALUE_ADDRESS (msymbol));
- }
- else
- {
- SYMBOL_VALUE_ADDRESS (sym) = SYMBOL_VALUE_ADDRESS (msymbol);
- }
-
- SYMBOL_SECTION (sym) = SYMBOL_SECTION (msymbol);
-
- if (prev)
- {
- sym = SYMBOL_VALUE_CHAIN (prev);
- }
- else
- {
- sym = global_sym_chain[hash];
- }
- }
- else
- {
- prev = sym;
- sym = SYMBOL_VALUE_CHAIN (sym);
- }
- }
- }
- return 1;
- }
-
- /* Assign values to global debugging symbols.
- Search the passed objfile first, then try the runtime common symbols.
- Complain about any remaining unresolved symbols and remove them
- from the chain. */
-
- void
- scan_file_globals (objfile)
- struct objfile *objfile;
- {
- int hash;
- struct symbol *sym, *prev;
-
- if (scan_file_globals_1 (objfile) == 0)
- return;
- if (rt_common_objfile && scan_file_globals_1 (rt_common_objfile) == 0)
- return;
-
- for (hash = 0; hash < HASHSIZE; hash++)
- {
- sym = global_sym_chain[hash];
- while (sym)
- {
- complain (&unresolved_sym_chain_complaint,
- objfile->name, SYMBOL_NAME (sym));
-
- /* Change the symbol address from the misleading chain value
- to address zero. */
- prev = sym;
- sym = SYMBOL_VALUE_CHAIN (sym);
- SYMBOL_VALUE_ADDRESS (prev) = 0;
- }
- }
- memset (global_sym_chain, 0, sizeof (global_sym_chain));
- }
-
- /* Initialize anything that needs initializing when starting to read
- a fresh piece of a symbol file, e.g. reading in the stuff corresponding
- to a psymtab. */
-
- void
- stabsread_init ()
- {
- }
-
- /* Initialize anything that needs initializing when a completely new
- symbol file is specified (not just adding some symbols from another
- file, e.g. a shared library). */
-
- void
- stabsread_new_init ()
- {
- /* Empty the hash table of global syms looking for values. */
- memset (global_sym_chain, 0, sizeof (global_sym_chain));
- }
-
- /* Initialize anything that needs initializing at the same time as
- start_symtab() is called. */
-
- void start_stabs ()
- {
- global_stabs = NULL; /* AIX COFF */
- /* Leave FILENUM of 0 free for builtin types and this file's types. */
- n_this_object_header_files = 1;
- type_vector_length = 0;
- type_vector = (struct type **) 0;
-
- /* FIXME: If common_block_name is not already NULL, we should complain(). */
- common_block_name = NULL;
-
- os9k_stabs = 0;
- }
-
- /* Call after end_symtab() */
-
- void end_stabs ()
- {
- if (type_vector)
- {
- free ((char *) type_vector);
- }
- type_vector = 0;
- type_vector_length = 0;
- previous_stab_code = 0;
- }
-
- void
- finish_global_stabs (objfile)
- struct objfile *objfile;
- {
- if (global_stabs)
- {
- patch_block_stabs (global_symbols, global_stabs, objfile);
- free ((PTR) global_stabs);
- global_stabs = NULL;
- }
- }
-
- /* Initializer for this module */
-
- void
- _initialize_stabsread ()
- {
- undef_types_allocated = 20;
- undef_types_length = 0;
- undef_types = (struct type **)
- xmalloc (undef_types_allocated * sizeof (struct type *));
- }
-