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author | Fred Fish <fnf@specifix.com> | 1992-07-28 04:22:18 +0000 |
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committer | Fred Fish <fnf@specifix.com> | 1992-07-28 04:22:18 +0000 |
commit | d07734e31fb134371b9bea71fc2736f7c28f4433 (patch) | |
tree | 807bcfb860cf9fc6eb8ba46c2a707cd2311264d8 /gdb/stabsread.c | |
parent | 9e2b3581cb9edfd9977256539e64cf0d5f0f224d (diff) | |
download | gdb-d07734e31fb134371b9bea71fc2736f7c28f4433.zip gdb-d07734e31fb134371b9bea71fc2736f7c28f4433.tar.gz gdb-d07734e31fb134371b9bea71fc2736f7c28f4433.tar.bz2 |
* Makefile.in (VERSION): Bump to 4.6.2.
* Makefile.in (SFILES_MAINDIR): Add stabsread.c
* Makefile.in (OBS): Add stabsread.o
* Makefile.in (stabsread.o): Add build rule.
* stabsread.c, stabsread.h: New files.
* buildsym.c: Split out stabs specific support to stabsread.c.
* buildsym.h: Split out stabs specific support to stabsread.h.
* dbxread.c (stabsread.h): Include
* dbxread.c (dbx_new_init): Call stabsread_new_init.
* dbxread.c (dbx_psymtab_to_symtab_1): Call stabsread_init.
* dbxread.c (read_ofile_symtab): Call end_stabs.
* dbxread.c (process_one_symbol): Call end_stabs and start_stabs.
* dbxread.c (elfstab_build_psymtabs): Call stabsread_new_init.
* dwarfread.c (psymtab_to_symtab_1): Call buildsym_init, add
really_free_pendings to cleanups.
* elfread.c (elf_new_init): Call stabsread_new_init.
* gdbtypes.c: Small changes to maintenance commands.
* mipsread.c (stabsread.h): Include.
* mipsread.c (psymtab_to_symtab_1): Call end_stabs.
* xcoffread.c (stabsread.h): Include.
* xcoffread.c (global_stabs): Remove redundant def.
* xcoffread.c (read_xcoff_symtab): Call start_stabs and end_stabs.
Diffstat (limited to 'gdb/stabsread.c')
-rw-r--r-- | gdb/stabsread.c | 3004 |
1 files changed, 3004 insertions, 0 deletions
diff --git a/gdb/stabsread.c b/gdb/stabsread.c new file mode 100644 index 0000000..d6da541 --- /dev/null +++ b/gdb/stabsread.c @@ -0,0 +1,3004 @@ +/* Support routines for decoding "stabs" debugging information format. + Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992 + 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" /* Needed for "struct complaint" */ +#include "objfiles.h" +#include "aout/stab_gnu.h" /* We always use GNU stabs, not native */ +#include "buildsym.h" + +/* Ask stabsread.h to define the vars it normally declares `extern'. */ +#define EXTERN /**/ +#include "stabsread.h" /* Our own declarations */ +#undef EXTERN + +static struct type * +dbx_alloc_type PARAMS ((int [2], struct objfile *)); + +static void +read_huge_number PARAMS ((char **, int, long *, int *)); + +static void +patch_block_stabs PARAMS ((struct pending *, struct pending_stabs *, + struct objfile *)); + +static void +fix_common_block PARAMS ((struct symbol *, 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 * +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 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 + +/* During some calls to read_type (and thus to read_range_type), this + contains the name of the type being defined. Range types are only + used in C as basic types. We use the name to distinguish the otherwise + identical basic types "int" and "long" and their unsigned versions. + FIXME, this should disappear with better type management. */ + +static char *long_kludge_name; + +#if 0 +struct complaint dbx_class_complaint = +{ + "encountered DBX-style class variable debugging information.\n\ +You seem to have compiled your program with \ +\"g++ -g0\" instead of \"g++ -g\".\n\ +Therefore GDB will not know about your class variables", 0, 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}; + +/* 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; + + +int +hashname (name) + char *name; +{ + register char *p = name; + register int total = p[0]; + register int c; + + c = p[1]; + total += c << 2; + if (c) + { + c = p[2]; + total += c << 4; + if (c) + { + total += p[3] << 6; + } + } + + /* Ensure result is positive. */ + if (total < 0) + { + total += (1000 << 6); + } + return (total % HASHSIZE); +} + + +/* 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) + error ("Invalid symbol data: type number (%d,%d) out of range at symtab pos %d.", + filenum, index, symnum); + + 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 *)); + } + return (&type_vector[index]); + } + else + { + real_filenum = this_object_header_files[filenum]; + + if (real_filenum >= n_header_files) + { + abort (); + } + + 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, ':'); + sym = find_symbol_in_list (symbols, name, pp-name); + if (!sym) + { +#ifndef IBM6000_TARGET + printf ("ERROR! stab symbol not found!\n"); /* FIXME */ +#endif + } + 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. */ + +void +read_type_number (pp, typenums) + register char **pp; + register int *typenums; +{ + if (**pp == '(') + { + (*pp)++; + typenums[0] = read_number (pp, ','); + typenums[1] = read_number (pp, ')'); + } + else + { + typenums[0] = 0; + typenums[1] = read_number (pp, 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; + +/* ARGSUSED */ +struct symbol * +define_symbol (valu, string, desc, type, objfile) + unsigned int 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; + struct type *temptype; + + /* 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 creat 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; + + /* If a nameless stab entry, all we need is the type, not the symbol. + e.g. ":t10=*2" */ + nameless = (p == string); + + sym = (struct symbol *) + obstack_alloc (&objfile -> symbol_obstack, 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 */ + } + + 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: + abort (); + } + } + else + { + normal: + SYMBOL_NAME (sym) = (char *) + obstack_alloc (&objfile -> symbol_obstack, ((p - string) + 1)); + /* Open-coded bcopy--saves function call time. */ + { + register char *p1 = string; + register char *p2 = SYMBOL_NAME (sym); + while (p1 != p) + { + *p2++ = *p1++; + } + *p2++ = '\0'; + } + } + p++; + /* Determine the type of name being defined. */ + /* 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. */ + /* (Peter Watkins @ Computervision) + Handle Sun-style local fortran array types 'ar...' . + (gnu@cygnus.com) -- this strchr() handles them properly? + (tiemann@cygnus.com) -- 'C' is for catch. */ + +#ifdef IBM6000_TARGET + + /* 'R' is for register parameters. */ + + if (!strchr ("cfFGpPrStTvVXCR", *p)) + +#else + + if (!strchr ("cfFGpPrStTvVXC", *p)) + +#endif + deftype = 'l'; + else + deftype = *p++; + + /* 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 (deftype == 'c') + { + if (*p++ != '=') + error ("Invalid symbol data at symtab pos %d.", symnum); + switch (*p++) + { + case 'r': + { + double d = atof (p); + char *dbl_valu; + + SYMBOL_TYPE (sym) = lookup_fundamental_type (objfile, + FT_DBL_PREC_FLOAT); + dbl_valu = (char *) + obstack_alloc (&objfile -> type_obstack, + sizeof (double)); + memcpy (dbl_valu, &d, sizeof (double)); + SWAP_TARGET_AND_HOST (dbl_valu, sizeof (double)); + SYMBOL_VALUE_BYTES (sym) = dbl_valu; + SYMBOL_CLASS (sym) = LOC_CONST_BYTES; + } + break; + case 'i': + { + SYMBOL_TYPE (sym) = lookup_fundamental_type (objfile, + FT_INTEGER); + SYMBOL_VALUE (sym) = atoi (p); + SYMBOL_CLASS (sym) = LOC_CONST; + } + break; + case 'e': + /* 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,;"). */ + { + int typenums[2]; + + read_type_number (&p, typenums); + if (*p++ != ',') + error ("Invalid symbol data: no comma in enum const symbol"); + + SYMBOL_TYPE (sym) = *dbx_lookup_type (typenums); + SYMBOL_VALUE (sym) = atoi (p); + SYMBOL_CLASS (sym) = LOC_CONST; + } + break; + default: + error ("Invalid symbol data at symtab pos %d.", symnum); + } + SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; + add_symbol_to_list (sym, &file_symbols); + return sym; + } + + /* Now usually comes a number that says which data type, + and possibly more stuff to define the type + (all of which is handled by read_type) */ + + if (deftype == 'p' && *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))); + } + +#ifdef IBM6000_TARGET + else if (deftype == 'R') + SYMBOL_TYPE (sym) = read_type (&p, objfile); +#endif + + else + { + /* The symbol class letter is followed by a type (typically the + type of the symbol, or its return-type, or etc). Read it. */ + + synonym = *p == 't'; + + if (synonym) + { + p += 1; + type_synonym_name = obsavestring (SYMBOL_NAME (sym), + strlen (SYMBOL_NAME (sym)), + &objfile -> symbol_obstack); + } + + /* Here we save the name of the symbol for read_range_type, which + ends up reading in the basic types. In stabs, unfortunately there + is no distinction between "int" and "long" types except their + names. Until we work out a saner type policy (eliminating most + builtin types and using the names specified in the files), we + save away the name so that far away from here in read_range_type, + we can examine it to decide between "int" and "long". FIXME. */ + long_kludge_name = SYMBOL_NAME (sym); + + SYMBOL_TYPE (sym) = read_type (&p, objfile); + } + + switch (deftype) + { + case 'C': + /* The name of a caught exception. */ + 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_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 = (struct type *) + obstack_alloc (&objfile -> type_obstack, + sizeof (struct type)); + + /* 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_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. */ + 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_CLASS (sym) = LOC_LOCAL; + SYMBOL_VALUE (sym) = valu; + SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; + add_symbol_to_list (sym, &local_symbols); + break; + + case 'p': + /* 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 it's gcc-compiled, if it says `short', believe it. */ + if (processing_gcc_compilation || BELIEVE_PCC_PROMOTION) + break; + +#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). Note that + this is only different from the BELIEVE_PCC_PROMOTION + case on big-endian machines. + + 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 no 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. */ + + temptype = lookup_fundamental_type (objfile, FT_INTEGER); + if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (temptype) + && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT + && 0 == SYMBOL_VALUE (sym) % TYPE_LENGTH (temptype)) + { + SYMBOL_VALUE (sym) += TYPE_LENGTH (temptype) + - TYPE_LENGTH (SYMBOL_TYPE (sym)); + } + break; + +#else /* no BELIEVE_PCC_PROMOTION_TYPE. */ + + /* If PCC says a parameter is a short or a char, + it is really an int. */ + temptype = lookup_fundamental_type (objfile, FT_INTEGER); + if (TYPE_LENGTH (SYMBOL_TYPE (sym)) < TYPE_LENGTH (temptype) + && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT) + { + SYMBOL_TYPE (sym) = TYPE_UNSIGNED (SYMBOL_TYPE (sym)) + ? lookup_fundamental_type (objfile, FT_UNSIGNED_INTEGER) + : temptype; + } + break; + +#endif /* no BELIEVE_PCC_PROMOTION_TYPE. */ + + 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) + goto process_prototype_types; + + /* Parameter which is in a register. */ + SYMBOL_CLASS (sym) = LOC_REGPARM; + SYMBOL_VALUE (sym) = STAB_REG_TO_REGNUM (valu); + if (SYMBOL_VALUE (sym) >= NUM_REGS) + { + complain (®_value_complaint, SYMBOL_NAME (sym)); + SYMBOL_VALUE (sym) = SP_REGNUM; /* Known safe, though useless */ + } + SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; + add_symbol_to_list (sym, &local_symbols); + break; + +#ifdef IBM6000_TARGET + case 'R': +#endif + case 'r': + /* Register variable (either global or local). */ + SYMBOL_CLASS (sym) = LOC_REGISTER; + SYMBOL_VALUE (sym) = STAB_REG_TO_REGNUM (valu); + if (SYMBOL_VALUE (sym) >= NUM_REGS) + { + complain (®_value_complaint, SYMBOL_NAME (sym)); + SYMBOL_VALUE (sym) = SP_REGNUM; /* Known safe, though useless */ + } + SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; + if (within_function) + 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_CLASS (sym) = LOC_STATIC; + SYMBOL_VALUE_ADDRESS (sym) = valu; + SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; + add_symbol_to_list (sym, &file_symbols); + break; + + case 't': + /* 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)); + } + + add_symbol_to_list (sym, &file_symbols); + break; + + case 'T': + /* 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_NAME (SYMBOL_TYPE (sym)) == 0) + TYPE_NAME (SYMBOL_TYPE (sym)) + = obconcat (&objfile -> type_obstack, "", + (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_ENUM + ? "enum " + : (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT + ? "struct " : "union ")), + SYMBOL_NAME (sym)); + add_symbol_to_list (sym, &file_symbols); + + if (synonym) + { + register struct symbol *typedef_sym = (struct symbol *) + obstack_alloc (&objfile -> type_obstack, + sizeof (struct symbol)); + SYMBOL_NAME (typedef_sym) = SYMBOL_NAME (sym); + SYMBOL_TYPE (typedef_sym) = SYMBOL_TYPE (sym); + + SYMBOL_CLASS (typedef_sym) = LOC_TYPEDEF; + SYMBOL_VALUE (typedef_sym) = valu; + SYMBOL_NAMESPACE (typedef_sym) = VAR_NAMESPACE; + add_symbol_to_list (typedef_sym, &file_symbols); + } + break; + + case 'V': + /* Static symbol of local scope */ + SYMBOL_CLASS (sym) = LOC_STATIC; + SYMBOL_VALUE_ADDRESS (sym) = valu; + SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; + add_symbol_to_list (sym, &local_symbols); + break; + + case 'v': + /* Reference parameter */ + SYMBOL_CLASS (sym) = LOC_REF_ARG; + SYMBOL_VALUE (sym) = valu; + 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_CLASS (sym) = LOC_LOCAL; + SYMBOL_VALUE (sym) = valu; + SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; + add_symbol_to_list (sym, &local_symbols); + break; + + default: + error ("Invalid symbol data: unknown symbol-type code `%c' at symtab pos %d.", deftype, symnum); + } + 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. */ + +struct type * +error_type (pp) + char **pp; +{ + complain (&error_type_complaint, 0); + 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; +} + + +/* Read a dbx type reference or definition; + return the type that is meant. + This can be just a number, in which case it references + a type already defined and placed in type_vector. + Or the number can be followed by an =, in which case + it means to define a new type according to the text that + follows the =. */ + +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]; + + /* 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 == '(') + { + read_type_number (pp, typenums); + + /* 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. */ +#if 0 /* Callers aren't prepared for a NULL result! FIXME -- metin! */ + { + struct type *tt; + + /* if such a type already exists, this is an unnecessary duplication + of the stab string, which is common in (RS/6000) xlc generated + objects. In that case, simply return NULL and let the caller take + care of it. */ + + tt = *dbx_lookup_type (typenums); + if (tt && tt->length && tt->code) + return NULL; + } +#endif + + *pp += 2; + } + 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 += 1; + } + + switch ((*pp)[-1]) + { + case 'x': + { + enum type_code code; + + /* Used to index through file_symbols. */ + struct pending *ppt; + int i; + + /* Name including "struct", etc. */ + char *type_name; + + /* Name without "struct", etc. */ + char *type_name_only; + + { + char *prefix; + char *from, *to; + + /* Set the type code according to the following letter. */ + switch ((*pp)[0]) + { + case 's': + code = TYPE_CODE_STRUCT; + prefix = "struct "; + break; + case 'u': + code = TYPE_CODE_UNION; + prefix = "union "; + break; + case 'e': + code = TYPE_CODE_ENUM; + prefix = "enum "; + break; + default: + return error_type (pp); + } + + to = type_name = (char *) + obstack_alloc (&objfile -> type_obstack, + (strlen (prefix) + + ((char *) strchr (*pp, ':') - (*pp)) + 1)); + + /* Copy the prefix. */ + from = prefix; + while (*to++ = *from++) + ; + to--; + + type_name_only = to; + + /* Copy the name. */ + from = *pp + 1; + while ((*to++ = *from++) != ':') + ; + *--to = '\0'; + + /* Set the pointer ahead of the name which we just read. */ + *pp = from; + +#if 0 + /* The following hack is clearly wrong, because it doesn't + check whether we are in a baseclass. I tried to reproduce + the case that it is trying to fix, but I couldn't get + g++ to put out a cross reference to a basetype. Perhaps + it doesn't do it anymore. */ + /* Note: for C++, the cross reference may be to a base type which + has not yet been seen. In this case, we skip to the comma, + which will mark the end of the base class name. (The ':' + at the end of the base class name will be skipped as well.) + But sometimes (ie. when the cross ref is the last thing on + the line) there will be no ','. */ + from = (char *) strchr (*pp, ','); + if (from) + *pp = from; +#endif /* 0 */ + } + + /* Now check to see whether the type has already been declared. */ + /* This is necessary at least in the case where the + program says something like + struct foo bar[5]; + The compiler puts out a cross-reference; we better find + set the length of the structure correctly so we can + set the length of the array. */ + 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) + && !strcmp (SYMBOL_NAME (sym), type_name_only)) + { + 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_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 */ + (*pp)--; + type = builtin_type (pp); /* (in xcoffread.c) */ + goto after_digits; + + case '0': + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + case '8': + case '9': + case '(': + (*pp)--; + read_type_number (pp, xtypenums); + type = *dbx_lookup_type (xtypenums); + /* fall through */ + + after_digits: + if (type == 0) + type = lookup_fundamental_type (objfile, FT_VOID); + 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 */ + type1 = read_type (pp, objfile); + type = make_function_type (type1, dbx_lookup_type (typenums)); + break; + + case 'k': /* Const qualifier on some type (Sun) */ + type = read_type (pp, objfile); + /* FIXME! For now, we ignore const and volatile qualifiers. */ + break; + + case 'B': /* Volatile qual on some type (Sun) */ + 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 += 1; + return_type = read_type (pp, objfile); + if (*(*pp)++ != ';') + complain (&invalid_member_complaint, (char *) 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)++ != ',') + error ("invalid member type data format, at symtab pos %d.", + symnum); + + 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': /* 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); + *dbx_lookup_type (typenums) = type; + break; + + case 's': /* Struct type */ + type = dbx_alloc_type (typenums, objfile); + if (!TYPE_NAME (type)) + TYPE_NAME (type) = type_synonym_name; + type_synonym_name = 0; + type = read_struct_type (pp, type, objfile); + break; + + case 'u': /* Union type */ + type = dbx_alloc_type (typenums, objfile); + if (!TYPE_NAME (type)) + TYPE_NAME (type) = type_synonym_name; + type_synonym_name = 0; + type = read_struct_type (pp, type, objfile); + TYPE_CODE (type) = TYPE_CODE_UNION; + 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); + break; + + default: + --*pp; /* Go back to the symbol in error */ + /* Particularly important if it was \0! */ + return error_type (pp); + } + + if (type == 0) + abort (); + + return type; +} + +/* This page contains subroutines of read_type. */ + +/* Read the description of a structure (or union type) + and return an object describing the type. */ + +static struct type * +read_struct_type (pp, type, objfile) + char **pp; + register struct type *type; + struct objfile *objfile; +{ + /* Total number of methods defined in this class. + If the class defines two `f' methods, and one `g' method, + then this will have the value 3. */ + int total_length = 0; + + struct nextfield + { + struct nextfield *next; + int visibility; /* 0=public, 1=protected, 2=public */ + struct field field; + }; + + struct next_fnfield + { + struct next_fnfield *next; + struct fn_field fn_field; + }; + + struct next_fnfieldlist + { + struct next_fnfieldlist *next; + struct fn_fieldlist fn_fieldlist; + }; + + register struct nextfield *list = 0; + struct nextfield *new; + register char *p; + int nfields = 0; + int non_public_fields = 0; + register int n; + + register struct next_fnfieldlist *mainlist = 0; + int nfn_fields = 0; + + TYPE_CODE (type) = TYPE_CODE_STRUCT; + INIT_CPLUS_SPECIFIC(type); + TYPE_FLAGS (type) &= ~TYPE_FLAG_STUB; + + /* First comes the total size in bytes. */ + + TYPE_LENGTH (type) = read_number (pp, 0); + + /* C++: Now, if the class is a derived class, then the next character + will be a '!', followed by the number of base classes derived from. + Each element in the list contains visibility information, + the offset of this base class in the derived structure, + and then the base type. */ + if (**pp == '!') + { + int i, n_baseclasses, offset; + struct type *baseclass; + int via_public; + + /* Nonzero if it is a virtual baseclass, i.e., + + struct A{}; + struct B{}; + struct C : public B, public virtual A {}; + + B is a baseclass of C; A is a virtual baseclass for C. This is a C++ + 2.0 language feature. */ + int via_virtual; + + *pp += 1; + + ALLOCATE_CPLUS_STRUCT_TYPE(type); + + n_baseclasses = read_number (pp, ','); + TYPE_FIELD_VIRTUAL_BITS (type) = + (B_TYPE *) obstack_alloc (&objfile -> type_obstack, + B_BYTES (n_baseclasses)); + B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), n_baseclasses); + + for (i = 0; i < n_baseclasses; i++) + { + if (**pp == '\\') + *pp = next_symbol_text (); + + switch (**pp) + { + case '0': + via_virtual = 0; + break; + case '1': + via_virtual = 1; + break; + default: + /* Bad visibility format. */ + return error_type (pp); + } + ++*pp; + + switch (**pp) + { + case '0': + via_public = 0; + non_public_fields++; + break; + case '2': + via_public = 2; + break; + default: + /* Bad visibility format. */ + return error_type (pp); + } + if (via_virtual) + SET_TYPE_FIELD_VIRTUAL (type, i); + ++*pp; + + /* Offset of the portion of the object corresponding to + this baseclass. Always zero in the absence of + multiple inheritance. */ + offset = read_number (pp, ','); + baseclass = read_type (pp, objfile); + *pp += 1; /* skip trailing ';' */ + + /* Make this baseclass visible for structure-printing purposes. */ + new = (struct nextfield *) alloca (sizeof (struct nextfield)); + memset (new, 0, sizeof (struct nextfield)); + new->next = list; + list = new; + list->visibility = via_public; + list->field.type = baseclass; + list->field.name = type_name_no_tag (baseclass); + list->field.bitpos = offset; + list->field.bitsize = 0; /* this should be an unpacked field! */ + nfields++; + } + TYPE_N_BASECLASSES (type) = n_baseclasses; + } + + /* Now come the fields, as NAME:?TYPENUM,BITPOS,BITSIZE; for each one. + 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 `?' is a placeholder for one of '/2' (public visibility), + '/1' (protected visibility), '/0' (private visibility), or nothing + (C style symbol table, public visibility). */ + + /* We better set p right now, in case there are no fields at all... */ + p = *pp; + + while (**pp != ';') + { + /* Check for and handle cretinous dbx symbol name continuation! */ + if (**pp == '\\') *pp = next_symbol_text (); + + /* Get space to record the next field's data. */ + new = (struct nextfield *) alloca (sizeof (struct nextfield)); + memset (new, 0, sizeof (struct nextfield)); + new->next = list; + list = new; + + /* Get the field name. */ + p = *pp; + if (*p == CPLUS_MARKER) + { + /* Special GNU C++ name. */ + if (*++p == 'v') + { + const char *prefix; + char *name = 0; + struct type *context; + + switch (*++p) + { + case 'f': + prefix = vptr_name; + break; + case 'b': + prefix = vb_name; + break; + default: + complain (&invalid_cpp_abbrev_complaint, *pp); + prefix = "INVALID_C++_ABBREV"; + break; + } + *pp = p + 1; + context = read_type (pp, objfile); + name = type_name_no_tag (context); + if (name == 0) + { + complain (&invalid_cpp_type_complaint, (char *) symnum); + name = "FOO"; + } + list->field.name = obconcat (&objfile -> type_obstack, + prefix, name, ""); + p = ++(*pp); + if (p[-1] != ':') + complain (&invalid_cpp_abbrev_complaint, *pp); + list->field.type = read_type (pp, objfile); + (*pp)++; /* Skip the comma. */ + list->field.bitpos = read_number (pp, ';'); + /* This field is unpacked. */ + list->field.bitsize = 0; + list->visibility = 0; /* private */ + non_public_fields++; + } + /* GNU C++ anonymous type. */ + else if (*p == '_') + break; + else + complain (&invalid_cpp_abbrev_complaint, *pp); + + nfields++; + continue; + } + + while (*p != ':') p++; + list->field.name = obsavestring (*pp, p - *pp, + &objfile -> type_obstack); + + /* C++: Check to see if we have hit the methods yet. */ + if (p[1] == ':') + break; + + *pp = p + 1; + + /* This means we have a visibility for a field coming. */ + if (**pp == '/') + { + switch (*++*pp) + { + case '0': + list->visibility = 0; /* private */ + non_public_fields++; + *pp += 1; + break; + + case '1': + list->visibility = 1; /* protected */ + non_public_fields++; + *pp += 1; + break; + + case '2': + list->visibility = 2; /* public */ + *pp += 1; + break; + } + } + else /* normal dbx-style format. */ + list->visibility = 2; /* public */ + + list->field.type = read_type (pp, objfile); + if (**pp == ':') + { + p = ++(*pp); +#if 0 + /* Possible future hook for nested types. */ + if (**pp == '!') + { + list->field.bitpos = (long)-2; /* nested type */ + p = ++(*pp); + } + else +#endif + { /* Static class member. */ + list->field.bitpos = (long)-1; + } + while (*p != ';') p++; + list->field.bitsize = (long) savestring (*pp, p - *pp); + *pp = p + 1; + nfields++; + continue; + } + else if (**pp != ',') + /* Bad structure-type format. */ + return error_type (pp); + + (*pp)++; /* Skip the comma. */ + list->field.bitpos = read_number (pp, ','); + list->field.bitsize = read_number (pp, ';'); + +#if 0 + /* FIXME-tiemann: Can't the compiler put out something which + lets us distinguish these? (or maybe just not put out anything + for the field). What is the story here? What does the compiler + really do? Also, patch gdb.texinfo for this case; I document + it as a possible problem there. Search for "DBX-style". */ + + /* This is wrong because this is identical to the symbols + produced for GCC 0-size arrays. For example: + typedef union { + int num; + char str[0]; + } foo; + The code which dumped core in such circumstances should be + fixed not to dump core. */ + + /* g++ -g0 can put out bitpos & bitsize zero for a static + field. This does not give us any way of getting its + class, so we can't know its name. But we can just + ignore the field so we don't dump core and other nasty + stuff. */ + if (list->field.bitpos == 0 + && list->field.bitsize == 0) + { + complain (&dbx_class_complaint, 0); + /* Ignore this field. */ + list = list->next; + } + else +#endif /* 0 */ + { + /* 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 (list->field.type) != TYPE_CODE_INT + && TYPE_CODE (list->field.type) != TYPE_CODE_ENUM) + list->field.bitsize = 0; + if ((list->field.bitsize == 8 * TYPE_LENGTH (list->field.type) + || (TYPE_CODE (list->field.type) == TYPE_CODE_ENUM + && (list->field.bitsize + == 8 * TYPE_LENGTH (lookup_fundamental_type (objfile, FT_INTEGER))) + ) + ) + && + list->field.bitpos % 8 == 0) + list->field.bitsize = 0; + nfields++; + } + } + + if (p[1] == ':') + /* chill the list of fields: the last entry (at the head) + is a partially constructed entry which we now scrub. */ + list = list->next; + + /* Now 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. */ + + TYPE_NFIELDS (type) = nfields; + TYPE_FIELDS (type) = (struct field *) + obstack_alloc (&objfile -> type_obstack, sizeof (struct field) * nfields); + + if (non_public_fields) + { + ALLOCATE_CPLUS_STRUCT_TYPE (type); + + TYPE_FIELD_PRIVATE_BITS (type) = + (B_TYPE *) obstack_alloc (&objfile -> type_obstack, + B_BYTES (nfields)); + B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); + + TYPE_FIELD_PROTECTED_BITS (type) = + (B_TYPE *) obstack_alloc (&objfile -> type_obstack, + B_BYTES (nfields)); + B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); + } + + /* Copy the saved-up fields into the field vector. */ + + for (n = nfields; list; list = list->next) + { + n -= 1; + TYPE_FIELD (type, n) = list->field; + if (list->visibility == 0) + SET_TYPE_FIELD_PRIVATE (type, n); + else if (list->visibility == 1) + SET_TYPE_FIELD_PROTECTED (type, n); + } + + /* Now come the method fields, as NAME::methods + where each method is of the form TYPENUM,ARGS,...:PHYSNAME; + At the end, we see a semicolon instead of a field. + + For the case of overloaded operators, the format is + op$::*.methods, where $ is the CPLUS_MARKER (usually '$'), + `*' holds the place for an operator name (such as `+=') + and `.' marks the end of the operator name. */ + if (p[1] == ':') + { + /* Now, read in the methods. To simplify matters, we + "unread" the name that has been read, so that we can + start from the top. */ + + ALLOCATE_CPLUS_STRUCT_TYPE (type); + /* For each list of method lists... */ + do + { + int i; + struct next_fnfield *sublist = 0; + struct type *look_ahead_type = NULL; + int length = 0; + struct next_fnfieldlist *new_mainlist; + char *main_fn_name; + + new_mainlist = (struct next_fnfieldlist *) + alloca (sizeof (struct next_fnfieldlist)); + memset (new_mainlist, 0, sizeof (struct next_fnfieldlist)); + + p = *pp; + + /* read in the name. */ + while (*p != ':') p++; + if ((*pp)[0] == 'o' && (*pp)[1] == 'p' && (*pp)[2] == CPLUS_MARKER) + { + /* This is a completely wierd case. In order to stuff in the + names that might contain colons (the usual name delimiter), + Mike Tiemann defined a different name format which is + signalled if the identifier is "op$". 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; + if (**pp == '\\') *pp = next_symbol_text (); + 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_mainlist->fn_fieldlist.name = main_fn_name; + + do + { + struct next_fnfield *new_sublist = + (struct next_fnfield *) alloca (sizeof (struct next_fnfield)); + memset (new_sublist, 0, sizeof (struct next_fnfield)); + + /* Check for and handle cretinous dbx symbol name continuation! */ + if (look_ahead_type == NULL) /* Normal case. */ + { + if (**pp == '\\') *pp = next_symbol_text (); + + new_sublist->fn_field.type = read_type (pp, objfile); + if (**pp != ':') + /* Invalid symtab info for method. */ + return error_type (pp); + } + else + { /* g++ version 1 kludge */ + new_sublist->fn_field.type = look_ahead_type; + look_ahead_type = NULL; + } + + *pp += 1; + 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) + new_sublist->fn_field.is_stub = 1; + new_sublist->fn_field.physname = savestring (*pp, p - *pp); + *pp = p + 1; + + /* Set this method's visibility fields. */ + switch (*(*pp)++ - '0') + { + case 0: + new_sublist->fn_field.is_private = 1; + break; + case 1: + new_sublist->fn_field.is_protected = 1; + break; + } + + if (**pp == '\\') *pp = next_symbol_text (); + 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, (char *) (long) **pp); + break; + } + + switch (*(*pp)++) + { + case '*': + /* 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_number (pp, ';')) + 2; + + if (**pp == '\\') *pp = next_symbol_text (); + + 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 error_type (pp); + 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, (char *) (long) (*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++; + if (**pp == '\\') *pp = next_symbol_text (); + } + while (**pp != ';' && **pp != '\0'); + + *pp += 1; + + new_mainlist->fn_fieldlist.fn_fields = + (struct fn_field *) obstack_alloc (&objfile -> type_obstack, + sizeof (struct fn_field) * length); + for (i = length; (i--, sublist); sublist = sublist->next) + new_mainlist->fn_fieldlist.fn_fields[i] = sublist->fn_field; + + new_mainlist->fn_fieldlist.length = length; + new_mainlist->next = mainlist; + mainlist = new_mainlist; + nfn_fields++; + total_length += length; + if (**pp == '\\') *pp = next_symbol_text (); + } + while (**pp != ';'); + } + + *pp += 1; + + + if (nfn_fields) + { + TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) + obstack_alloc (&objfile -> type_obstack, + sizeof (struct fn_fieldlist) * nfn_fields); + TYPE_NFN_FIELDS (type) = nfn_fields; + TYPE_NFN_FIELDS_TOTAL (type) = total_length; + } + + { + int i; + for (i = 0; i < TYPE_N_BASECLASSES (type); ++i) + { + if (TYPE_CODE (TYPE_BASECLASS (type, i)) == TYPE_CODE_UNDEF) + /* @@ Memory leak on objfile->type_obstack? */ + return error_type (pp); + TYPE_NFN_FIELDS_TOTAL (type) += + TYPE_NFN_FIELDS_TOTAL (TYPE_BASECLASS (type, i)); + } + } + + for (n = nfn_fields; mainlist; mainlist = mainlist->next) { + --n; /* Circumvent Sun3 compiler bug */ + TYPE_FN_FIELDLISTS (type)[n] = mainlist->fn_fieldlist; + } + + if (**pp == '~') + { + *pp += 1; + + if (**pp == '=' || **pp == '+' || **pp == '-') + { + /* Obsolete flags that used to indicate the presence + of constructors and/or destructors. */ + *pp += 1; + } + + /* Read either a '%' or the final ';'. */ + if (*(*pp)++ == '%') + { + /* We'd like to be able to derive the vtable pointer field + from the type information, but when it's inherited, that's + hard. A reason it's hard is because we may read in the + info about a derived class before we read in info about + the base class that provides the vtable pointer field. + Once the base info has been read, we could fill in the info + for the derived classes, but for the fact that by then, + we don't remember who needs what. */ + +#if 0 + int predicted_fieldno = -1; +#endif + + /* Now we must record the virtual function table pointer's + field information. */ + + struct type *t; + int i; + + +#if 0 + { + /* In version 2, we derive the vfield ourselves. */ + for (n = 0; n < nfields; n++) + { + if (! strncmp (TYPE_FIELD_NAME (type, n), vptr_name, + sizeof (vptr_name) -1)) + { + predicted_fieldno = n; + break; + } + } + if (predicted_fieldno < 0) + for (n = 0; n < TYPE_N_BASECLASSES (type); n++) + if (! TYPE_FIELD_VIRTUAL (type, n) + && TYPE_VPTR_FIELDNO (TYPE_BASECLASS (type, n)) >= 0) + { + predicted_fieldno = TYPE_VPTR_FIELDNO (TYPE_BASECLASS (type, n)); + break; + } + } +#endif + + t = read_type (pp, objfile); + p = (*pp)++; + while (*p != '\0' && *p != ';') + p++; + if (*p == '\0') + /* Premature end of symbol. */ + return error_type (pp); + + TYPE_VPTR_BASETYPE (type) = t; + if (type == t) + { + if (TYPE_FIELD_NAME (t, TYPE_N_BASECLASSES (t)) == 0) + { + /* FIXME-tiemann: what's this? */ +#if 0 + TYPE_VPTR_FIELDNO (type) = i = TYPE_N_BASECLASSES (t); +#else + error_type (pp); +#endif + } + else 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; + break; + } + if (i < 0) + /* Virtual function table field not found. */ + return error_type (pp); + } + else + TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t); + +#if 0 + if (TYPE_VPTR_FIELDNO (type) != predicted_fieldno) + error ("TYPE_VPTR_FIELDNO miscalculated"); +#endif + + *pp = p + 1; + } + } + + 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; + + /* Format of an array type: + "ar<index type>;lower;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 = read_type (pp, objfile); + if (**pp != ';') + /* Improper format of array type decl. */ + return error_type (pp); + ++*pp; + + if (!(**pp >= '0' && **pp <= '9')) + { + *pp += 1; + adjustable = 1; + } + lower = read_number (pp, ';'); + + if (!(**pp >= '0' && **pp <= '9')) + { + *pp += 1; + adjustable = 1; + } + upper = read_number (pp, ';'); + + element_type = read_type (pp, objfile); + + if (adjustable) + { + lower = 0; + upper = -1; + } + + { + /* Create range type. */ + range_type = (struct type *) + obstack_alloc (&objfile -> type_obstack, sizeof (struct type)); + memset (range_type, 0, sizeof (struct type)); + TYPE_OBJFILE (range_type) = objfile; + TYPE_CODE (range_type) = TYPE_CODE_RANGE; + TYPE_TARGET_TYPE (range_type) = index_type; + + /* This should never be needed. */ + TYPE_LENGTH (range_type) = sizeof (int); + + TYPE_NFIELDS (range_type) = 2; + TYPE_FIELDS (range_type) = + (struct field *) obstack_alloc (&objfile -> type_obstack, + 2 * sizeof (struct field)); + TYPE_FIELD_BITPOS (range_type, 0) = lower; + TYPE_FIELD_BITPOS (range_type, 1) = upper; + } + + TYPE_CODE (type) = TYPE_CODE_ARRAY; + TYPE_TARGET_TYPE (type) = element_type; + TYPE_LENGTH (type) = (upper - lower + 1) * TYPE_LENGTH (element_type); + TYPE_NFIELDS (type) = 1; + TYPE_FIELDS (type) = + (struct field *) obstack_alloc (&objfile -> type_obstack, + sizeof (struct field)); + TYPE_FIELD_TYPE (type, 0) = 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_LENGTH (element_type) == 0 && !adjustable) + 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; + +#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. */ + while (**pp && **pp != ';' && **pp != ',') + { + /* Check for and handle cretinous dbx symbol name continuation! */ + if (**pp == '\\') *pp = next_symbol_text (); + + p = *pp; + while (*p != ':') p++; + name = obsavestring (*pp, p - *pp, &objfile -> symbol_obstack); + *pp = p + 1; + n = read_number (pp, ','); + + sym = (struct symbol *) obstack_alloc (&objfile -> symbol_obstack, sizeof (struct symbol)); + memset (sym, 0, sizeof (struct symbol)); + SYMBOL_NAME (sym) = name; + 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) = sizeof (int); + TYPE_CODE (type) = TYPE_CODE_ENUM; + TYPE_FLAGS (type) &= ~TYPE_FLAG_STUB; + TYPE_NFIELDS (type) = nsyms; + TYPE_FIELDS (type) = (struct field *) + obstack_alloc (&objfile -> type_obstack, + 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; + } + +#if 0 + /* This screws up perfectly good C programs with enums. FIXME. */ + /* Is this Modula-2's BOOLEAN type? Flag it as such if so. */ + if(TYPE_NFIELDS(type) == 2 && + ((!strcmp(TYPE_FIELD_NAME(type,0),"TRUE") && + !strcmp(TYPE_FIELD_NAME(type,1),"FALSE")) || + (!strcmp(TYPE_FIELD_NAME(type,1),"TRUE") && + !strcmp(TYPE_FIELD_NAME(type,0),"FALSE")))) + TYPE_CODE(type) = TYPE_CODE_BOOL; +#endif + + 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 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_number (pp, ';'); + + /* The second number is always 0, so ignore it too. */ + read_number (pp, ';'); + + /* The third number is the number of bits for this type. */ + nbits = read_number (pp, 0); + + /* FIXME. Here we should just be able to make a type of the right + number of bits and signedness. FIXME. */ + + if (nbits == TARGET_LONG_LONG_BIT) + return (lookup_fundamental_type (objfile, + signed_type? FT_LONG_LONG: FT_UNSIGNED_LONG_LONG)); + + if (nbits == TARGET_INT_BIT) + { + /* FIXME -- the only way to distinguish `int' from `long' + is to look at its name! */ + if (signed_type) + { + if (long_kludge_name && long_kludge_name[0] == 'l' /* long */) + return lookup_fundamental_type (objfile, FT_LONG); + else + return lookup_fundamental_type (objfile, FT_INTEGER); + } + else + { + if (long_kludge_name + && ((long_kludge_name[0] == 'u' /* unsigned */ && + long_kludge_name[9] == 'l' /* long */) + || (long_kludge_name[0] == 'l' /* long unsigned */))) + return lookup_fundamental_type (objfile, FT_UNSIGNED_LONG); + else + return lookup_fundamental_type (objfile, FT_UNSIGNED_INTEGER); + } + } + + if (nbits == TARGET_SHORT_BIT) + return (lookup_fundamental_type (objfile, + signed_type? FT_SHORT: FT_UNSIGNED_SHORT)); + + if (nbits == TARGET_CHAR_BIT) + return (lookup_fundamental_type (objfile, + signed_type? FT_CHAR: FT_UNSIGNED_CHAR)); + + if (nbits == 0) + return lookup_fundamental_type (objfile, FT_VOID); + + return error_type (pp); +} + +static struct type * +read_sun_floating_type (pp, typenums, objfile) + char **pp; + int typenums[2]; + struct objfile *objfile; +{ + int nbytes; + + /* The first number has more details about the type, for example + FN_COMPLEX. See the sun stab.h. */ + read_number (pp, ';'); + + /* The second number is the number of bytes occupied by this type */ + nbytes = read_number (pp, ';'); + + if (**pp != 0) + return error_type (pp); + + if (nbytes == TARGET_FLOAT_BIT / TARGET_CHAR_BIT) + return lookup_fundamental_type (objfile, FT_FLOAT); + + if (nbytes == TARGET_DOUBLE_BIT / TARGET_CHAR_BIT) + return lookup_fundamental_type (objfile, FT_DBL_PREC_FLOAT); + + if (nbytes == TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT) + return lookup_fundamental_type (objfile, FT_EXT_PREC_FLOAT); + + return error_type (pp); +} + +/* 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 *VALUE and set *BITS to 0. + If not, set *BITS to be the number of bits in the number. + + If encounter garbage, set *BITS to -1. */ + +static void +read_huge_number (pp, end, valu, bits) + char **pp; + int end; + long *valu; + 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; + } + } + 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; + } + + /* -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 (valu) + *valu = n * sign; + if (bits) + *bits = 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; + + /* First comes a type we are a subrange of. + In C it is usually 0, 1 or the type being defined. */ + read_type_number (pp, rangenums); + 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. */ + read_huge_number (pp, ';', &n2, &n2bits); + read_huge_number (pp, ';', &n3, &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; + + /* 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. */ + else if (n2bits != 0 && n3bits != 0 && n2bits == n3bits + 1) + { + got_signed = 1; + nbits = n2bits; + } + + /* Check for "long long". */ + if (got_signed && nbits == TARGET_LONG_LONG_BIT) + return (lookup_fundamental_type (objfile, FT_LONG_LONG)); + if (got_unsigned && nbits == TARGET_LONG_LONG_BIT) + return (lookup_fundamental_type (objfile, FT_UNSIGNED_LONG_LONG)); + + if (got_signed || got_unsigned) + { + result_type = (struct type *) + obstack_alloc (&objfile -> type_obstack, + sizeof (struct type)); + memset (result_type, 0, sizeof (struct type)); + TYPE_OBJFILE (result_type) = objfile; + TYPE_LENGTH (result_type) = nbits / TARGET_CHAR_BIT; + TYPE_CODE (result_type) = TYPE_CODE_INT; + if (got_unsigned) + TYPE_FLAGS (result_type) |= TYPE_FLAG_UNSIGNED; + return result_type; + } + 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 (lookup_fundamental_type (objfile, FT_VOID)); + + /* 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! + We don't have complex types, so we would lose on all fortran files! + So return type `double' for all of those. It won't work right + for the complex values, but at least it makes the file loadable. + + FIXME, we may be able to distinguish these by their names. FIXME. */ + + if (n3 == 0 && n2 > 0) + { + if (n2 == sizeof (float)) + return (lookup_fundamental_type (objfile, FT_FLOAT)); + return (lookup_fundamental_type (objfile, FT_DBL_PREC_FLOAT)); + } + + /* If the upper bound is -1, it must really be an unsigned int. */ + + else if (n2 == 0 && n3 == -1) + { + /* FIXME -- the only way to distinguish `unsigned int' from `unsigned + long' is to look at its name! */ + if ( + long_kludge_name && ((long_kludge_name[0] == 'u' /* unsigned */ && + long_kludge_name[9] == 'l' /* long */) + || (long_kludge_name[0] == 'l' /* long unsigned */))) + return (lookup_fundamental_type (objfile, FT_UNSIGNED_LONG)); + else + return (lookup_fundamental_type (objfile, FT_UNSIGNED_INTEGER)); + } + + /* 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 (lookup_fundamental_type (objfile, FT_CHAR)); + + /* Assumptions made here: Subrange of self is equivalent to subrange + of int. FIXME: Host and target type-sizes assumed the same. */ + /* FIXME: This is the *only* place in GDB that depends on comparing + some type to a builtin type with ==. Fix it! */ + else if (n2 == 0 + && (self_subrange || + *dbx_lookup_type (rangenums) == lookup_fundamental_type (objfile, FT_INTEGER))) + { + /* an unsigned type */ +#ifdef LONG_LONG + if (n3 == - sizeof (long long)) + return (lookup_fundamental_type (objfile, FT_UNSIGNED_LONG_LONG)); +#endif + /* FIXME -- the only way to distinguish `unsigned int' from `unsigned + long' is to look at its name! */ + if (n3 == (unsigned long)~0L && + long_kludge_name && ((long_kludge_name[0] == 'u' /* unsigned */ && + long_kludge_name[9] == 'l' /* long */) + || (long_kludge_name[0] == 'l' /* long unsigned */))) + return (lookup_fundamental_type (objfile, FT_UNSIGNED_LONG)); + if (n3 == (unsigned int)~0L) + return (lookup_fundamental_type (objfile, FT_UNSIGNED_INTEGER)); + if (n3 == (unsigned short)~0L) + return (lookup_fundamental_type (objfile, FT_UNSIGNED_SHORT)); + if (n3 == (unsigned char)~0L) + return (lookup_fundamental_type (objfile, FT_UNSIGNED_CHAR)); + } +#ifdef LONG_LONG + else if (n3 == 0 && n2 == -sizeof (long long)) + return (lookup_fundamental_type (objfile, FT_LONG_LONG)); +#endif + else if (n2 == -n3 -1) + { + /* a signed type */ + /* FIXME -- the only way to distinguish `int' from `long' is to look + at its name! */ + if ((n3 ==(long)(((unsigned long)1 << (8 * sizeof (long) - 1)) - 1)) && + long_kludge_name && long_kludge_name[0] == 'l' /* long */) + return (lookup_fundamental_type (objfile, FT_LONG)); + if (n3 == (long)(((unsigned long)1 << (8 * sizeof (int) - 1)) - 1)) + return (lookup_fundamental_type (objfile, FT_INTEGER)); + if (n3 == ( 1 << (8 * sizeof (short) - 1)) - 1) + return (lookup_fundamental_type (objfile, FT_SHORT)); + if (n3 == ( 1 << (8 * sizeof (char) - 1)) - 1) + return (lookup_fundamental_type (objfile, FT_SIGNED_CHAR)); + } + + /* 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); + + result_type = (struct type *) + obstack_alloc (&objfile -> type_obstack, sizeof (struct type)); + memset (result_type, 0, sizeof (struct type)); + TYPE_OBJFILE (result_type) = objfile; + + TYPE_CODE (result_type) = TYPE_CODE_RANGE; + + TYPE_TARGET_TYPE (result_type) = *dbx_lookup_type(rangenums); + if (TYPE_TARGET_TYPE (result_type) == 0) { + complain (&range_type_base_complaint, (char *) rangenums[1]); + TYPE_TARGET_TYPE (result_type) = lookup_fundamental_type (objfile, FT_INTEGER); + } + + TYPE_NFIELDS (result_type) = 2; + TYPE_FIELDS (result_type) = + (struct field *) obstack_alloc (&objfile -> type_obstack, + 2 * sizeof (struct field)); + memset (TYPE_FIELDS (result_type), 0, 2 * sizeof (struct field)); + TYPE_FIELD_BITPOS (result_type, 0) = n2; + TYPE_FIELD_BITPOS (result_type, 1) = n3; + + TYPE_LENGTH (result_type) = TYPE_LENGTH (TYPE_TARGET_TYPE (result_type)); + + return result_type; +} + +/* 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. */ + +long +read_number (pp, end) + char **pp; + int end; +{ + register char *p = *pp; + register long n = 0; + register int c; + int sign = 1; + + /* Handle an optional leading minus sign. */ + + if (*p == '-') + { + sign = -1; + p++; + } + + /* Read the digits, as far as they go. */ + + while ((c = *p++) >= '0' && c <= '9') + { + n *= 10; + n += c - '0'; + } + if (end) + { + if (c && c != end) + error ("Invalid symbol data: invalid character \\%03o at symbol pos %d.", c, symnum); + } + else + --p; + + *pp = p; + return n * sign; +} + +/* 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 += 1; + + /* Check for and handle cretinous dbx symbol name continuation! */ + if (**pp == '\\') + *pp = next_symbol_text (); + + types[n++] = read_type (pp, objfile); + } + *pp += 1; /* 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; +} + +/* 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_NAMESPACE (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. */ + if (TYPE_FLAGS (*type) & TYPE_FLAG_STUB) + { + struct pending *ppt; + int i; + /* Name of the type, without "struct" or "union" */ + char *typename = TYPE_NAME (*type); + + if (!strncmp (typename, "struct ", 7)) + typename += 7; + if (!strncmp (typename, "union ", 6)) + typename += 6; + if (!strncmp (typename, "enum ", 5)) + typename += 5; + + 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)) + && !strcmp (SYMBOL_NAME (sym), typename)) + { + memcpy (*type, SYMBOL_TYPE (sym), + sizeof (struct type)); + } + } + } + } + } + break; + + case TYPE_CODE_ARRAY: + { + 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)); + } + break; + + default: + badtype: + error ("GDB internal error. cleanup_undefined_types with bad type %d.", 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. */ + +void +scan_file_globals (objfile) + struct objfile *objfile; +{ + int hash; + struct minimal_symbol *msymbol; + struct symbol *sym, *prev; + + if (objfile->msymbols == 0) /* Beware the null file. */ + return; + + for (msymbol = objfile -> msymbols; msymbol -> name != NULL; msymbol++) + { + QUIT; + + prev = NULL; + + /* Get the hash index and check all the symbols + under that hash index. */ + + hash = hashname (msymbol -> name); + + for (sym = global_sym_chain[hash]; sym;) + { + if (*(msymbol -> name) == SYMBOL_NAME (sym)[0] + && !strcmp(msymbol -> name + 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, msymbol -> address); + } + else + { + SYMBOL_VALUE_ADDRESS (sym) = msymbol -> address; + } + + if (prev) + { + sym = SYMBOL_VALUE_CHAIN (prev); + } + else + { + sym = global_sym_chain[hash]; + } + } + else + { + prev = sym; + sym = SYMBOL_VALUE_CHAIN (sym); + } + } + } +} + +/* 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; +} + +/* 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 *)); +} |