-/* Support routines for decoding "stabs" debugging information format.
- Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993
- 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 "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 "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 int
-read_type_number PARAMS ((char **, int *));
-
-static struct type *
-read_range_type PARAMS ((char **, int [2], struct objfile *));
-
-static struct type *
-os9k_read_type PARAMS ((char **, struct objfile *));
-
-static struct type *
-os9k_read_enum_type PARAMS ((char **, struct type *, struct objfile *));
-
-static int
-read_struct_fields PARAMS ((struct field_info *, char **, struct type *,
- struct objfile *));
-
-static int
-attach_fields_to_type PARAMS ((struct field_info *, struct type *,
- struct objfile *));
-
-static struct type *
-os9k_read_array_type PARAMS ((char **, struct type *, struct objfile *));
-
-extern struct complaint error_type_complaint;
-extern struct complaint stabs_general_complaint;
-extern struct complaint range_type_base_complaint;
-extern struct complaint reg_value_complaint;
-
-/* 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
-
-/* 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) = next_symbol_text (); \
- } while (0)
-
-\f
-static struct type **init_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(tv)
- struct type **tv;
-{
- int i;
- for (i=0; i<sizeof(init_type_vector)/sizeof(struct type **); i++)
- tv[i] = (init_type_vector[i] == 0 ? 0 : *(init_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. */
-
-static 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)
- {
- /* 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 *));
- 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);
-}
-
-\f
-/* 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;
-}
-
-\f
-/* 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 = next_symbol_text ();
- }
- else
- {
- break;
- }
- }
- return (builtin_type_error);
-}
-
-/* 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 */
-
-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;
-
- fip -> list -> visibility = VISIBILITY_PUBLIC;
- fip -> list -> field.type = os9k_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 != ';' && **pp != '\0')
- {
- 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;
-
- /* 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;
-}
-
-/* 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);
-
- /* 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;
- 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_struct_fields (&fi, pp, type, objfile)
- || !attach_fields_to_type (&fi, type, objfile)
- )
- {
- do_cleanups (back_to);
- return (error_type (pp));
- }
-
- do_cleanups (back_to);
- return (type);
-}
-
-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++;
- }
-
- 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, 0, 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);
-}
-
-#if !defined (REG_STRUCT_HAS_ADDR)
-#define REG_STRUCT_HAS_ADDR(gcc_p) 0
-#endif
-
-static char *type_synonym_name = NULL;
-
-struct symbol *
-os9k_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));
-
- 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 */
- }
-
- {
- 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) = os9k_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) = os9k_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) = os9k_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++;
- os9k_read_type (&p, objfile);
- }
- break;
-
- case 'F':
- /* A global function definition. */
- SYMBOL_TYPE (sym) = os9k_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 'V':
- SYMBOL_TYPE (sym) = os9k_read_type (&p, objfile);
- SYMBOL_VALUE_ADDRESS (sym) = valu;
-/*
- 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 'l':
- SYMBOL_TYPE (sym) = os9k_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':
- SYMBOL_TYPE (sym) = os9k_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);
- break;
-
- 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)
- {
- os9k_read_type (&p, objfile);
- goto process_prototype_types;
- }
- /*FALLTHROUGH*/
-
- case 'R':
-#if 0
- /* Parameter which is in a register. */
- SYMBOL_TYPE (sym) = os9k_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;
-#endif 0
- case 'r':
- /* Register variable (either global or local). */
- SYMBOL_TYPE (sym) = os9k_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.
-
- But we only do this in the REG_STRUCT_HAS_ADDR case, 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
- && REG_STRUCT_HAS_ADDR (processing_gcc_compilation)
- && (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT
- || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_UNION))
- {
- struct symbol *prev_sym;
- prev_sym = local_symbols->symbol[local_symbols->nsyms - 1];
- if (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 't':
- SYMBOL_TYPE (sym) = os9k_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;
-
- if (TYPE_NAME (SYMBOL_TYPE (sym)) == NULL)
- {
- if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR
- || 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) = os9k_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 at top level of file */
- SYMBOL_TYPE (sym) = os9k_read_type (&p, objfile);
- SYMBOL_CLASS (sym) = LOC_STATIC;
- SYMBOL_VALUE_ADDRESS (sym) = valu;
- SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &file_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)
- && ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT)
- || (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_UNION)))
- SYMBOL_CLASS (sym) = LOC_REGPARM_ADDR;
-
- return sym;
-}
-
-\f
-/* 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. */
-
-static struct type *
-os9k_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;
- TYPE_NAME(type) = NULL;
- 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, 0, 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 = os9k_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 = os9k_read_type (pp, objfile);
- type = make_pointer_type (type1, dbx_lookup_type (typenums));
- break;
-
- case '&': /* Reference to another type */
- type1 = os9k_read_type (pp, objfile);
- type = make_reference_type (type1, dbx_lookup_type (typenums));
- break;
-
- case 'f': /* Function returning another type */
- if (**pp == '(') {
- while (**pp != ')') ++*pp; /* skip os9000 function prototype */
- ++*pp;
- }
- type1 = os9k_read_type (pp, objfile);
- type = make_function_type (type1, dbx_lookup_type (typenums));
- break;
-
- case 'c': /* Const qualifier on some type (Sun) */
- type = os9k_read_type (pp, objfile);
- /* FIXME! For now, we ignore const and volatile qualifiers. */
- break;
-
- case 'b': /* Const volatile */
- case 'i': /* Volatile qual on some type (Sun) */
- type = os9k_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 = os9k_read_type (pp, objfile);
- struct type *memtype;
-
- if (**pp != ',')
- /* Invalid member type data format. */
- return error_type (pp);
- ++*pp;
-
- memtype = os9k_read_type (pp, objfile);
- type = dbx_alloc_type (typenums, objfile);
- smash_to_member_type (type, domain, memtype);
- }
- break;
-
- case 'r': /* Range type */
- type = read_range_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 = os9k_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')
- ++*pp;
-
- type = dbx_alloc_type (typenums, objfile);
- type = os9k_read_array_type (pp, type, objfile);
- if (is_string)
- TYPE_CODE (type) = TYPE_CODE_STRING;
- break;
-
- case 'S':
- type1 = os9k_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;
-
- 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 *
-os9k_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:
- "arlower,upper;<array_contents_type>". Put code in
- to handle this.
-
- Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
- for these, produce a type like float[][]. */
-
- index_type = builtin_type_int;
-
- if (!(**pp >= '0' && **pp <= '9') && **pp != '-')
- {
- (*pp)++;
- adjustable = 1;
- }
- lower = read_huge_number (pp, ',', &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 = os9k_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. */
- /* FIXME: Why check for zero length rather than TYPE_FLAG_STUB? I think
- the two have the same effect except that the latter is cleaner and the
- former would be wrong for types which really are zero-length (if we
- have any). */
-
- if (TYPE_LENGTH (element_type) == 0 && !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 *
-os9k_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 size;
- 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;
-
- /* 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. */
-
- size = read_huge_number(pp, 0, &nbits);
- if (nbits != 0)
- return error_type (pp);
- 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 = 0; syms; syms = syms->next)
- {
- int j = 0;
- if (syms == osyms)
- j = o_nsyms;
- for (; j < syms->nsyms; j++,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;
-}
projects / binutils-gdb.git / commitdiff