| blob | 2611bc3237a245148fc65d6e739523e9fb774a92 |
1 /* stabs.c -- Parse stabs debugging information
2 Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
3 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor <ian@cygnus.com>.
6 This file is part of GNU Binutils.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
21 02111-1307, USA. */
23 /* This file contains code which parses stabs debugging information.
24 The organization of this code is based on the gdb stabs reading
25 code. The job it does is somewhat different, because it is not
26 trying to identify the correct address for anything. */
28 #include <stdio.h>
39 /* Meaningless definition needs by aout64.h. FIXME. */
40 #define BYTES_IN_WORD 4
45 /* The number of predefined XCOFF types. */
47 #define XCOFF_TYPE_COUNT 34
49 /* This structure is used as a handle so that the stab parsing doesn't
50 need to use any static variables. */
52 struct stab_handle
53 {
54 /* The BFD. */
56 /* TRUE if this is stabs in sections. */
57 bfd_boolean sections;
58 /* The symbol table. */
60 /* The number of symbols. */
62 /* The accumulated file name string. */
64 /* The value of the last N_SO symbol. */
65 bfd_vma so_value;
66 /* The value of the start of the file, so that we can handle file
67 relative N_LBRAC and N_RBRAC symbols. */
68 bfd_vma file_start_offset;
69 /* The offset of the start of the function, so that we can handle
70 function relative N_LBRAC and N_RBRAC symbols. */
71 bfd_vma function_start_offset;
72 /* The version number of gcc which compiled the current compilation
73 unit, 0 if not compiled by gcc. */
75 /* Whether an N_OPT symbol was seen that was not generated by gcc,
76 so that we can detect the SunPRO compiler. */
77 bfd_boolean n_opt_found;
78 /* The main file name. */
80 /* A stack of unfinished N_BINCL files. */
82 /* A list of finished N_BINCL files. */
84 /* Whether we are inside a function or not. */
85 bfd_boolean within_function;
86 /* The address of the end of the function, used if we have seen an
87 N_FUN symbol while in a function. This is -1 if we have not seen
88 an N_FUN (the normal case). */
89 bfd_vma function_end;
90 /* The depth of block nesting. */
92 /* List of pending variable definitions. */
94 /* Number of files for which we have types. */
96 /* Lists of types per file. */
98 /* Predefined XCOFF types. */
100 /* Undefined tags. */
102 /* Set by parse_stab_type if it sees a structure defined as a cross
103 reference to itself. Reset by parse_stab_type otherwise. */
104 bfd_boolean self_crossref;
105 };
107 /* A list of these structures is used to hold pending variable
108 definitions seen before the N_LBRAC of a block. */
110 struct stab_pending_var
111 {
112 /* Next pending variable definition. */
114 /* Name. */
116 /* Type. */
117 debug_type type;
118 /* Kind. */
120 /* Value. */
121 bfd_vma val;
122 };
124 /* A list of these structures is used to hold the types for a single
125 file. */
127 struct stab_types
128 {
129 /* Next set of slots for this file. */
131 /* Types indexed by type number. */
132 #define STAB_TYPES_SLOTS (16)
134 };
136 /* We keep a list of undefined tags that we encounter, so that we can
137 fill them in if the tag is later defined. */
139 struct stab_tag
140 {
141 /* Next undefined tag. */
143 /* Tag name. */
145 /* Type kind. */
147 /* Slot to hold real type when we discover it. If we don't, we fill
148 in an undefined tag type. */
149 debug_type slot;
150 /* Indirect type we have created to point at slot. */
151 debug_type type;
152 };
156 static bfd_vma parse_number
158 static void bad_stab
160 static void warn_stab
162 static bfd_boolean parse_stab_string
164 static debug_type parse_stab_type
166 debug_type **));
167 static bfd_boolean parse_stab_type_number
169 static debug_type parse_stab_range_type
172 static debug_type parse_stab_sun_builtin_type
174 static debug_type parse_stab_sun_floating_type
176 static debug_type parse_stab_enum_type
178 static debug_type parse_stab_struct_type
181 static bfd_boolean parse_stab_baseclasses
183 static bfd_boolean parse_stab_struct_fields
185 bfd_boolean *));
186 static bfd_boolean parse_stab_cpp_abbrev
188 static bfd_boolean parse_stab_one_struct_field
191 static bfd_boolean parse_stab_members
194 static debug_type parse_stab_argtypes
197 static bfd_boolean parse_stab_tilde_field
200 static debug_type parse_stab_array_type
202 static void push_bincl
206 static bfd_boolean find_excl
208 static bfd_boolean stab_record_variable
211 static bfd_boolean stab_emit_pending_vars
215 static debug_type stab_find_type
217 static bfd_boolean stab_record_type
219 static debug_type stab_xcoff_builtin_type
221 static debug_type stab_find_tagged_type
228 /* Save a string in memory. */
234 {
241 }
243 /* Read a number from a string. */
245 static bfd_vma
249 {
261 {
262 /* If bfd_vma is larger than unsigned long, and the number is
263 meant to be negative, we have to make sure that we sign
264 extend properly. */
268 }
270 /* Note that even though strtoul overflowed, it should have set *pp
271 to the end of the number, which is where we want it. */
274 {
276 bfd_boolean neg;
279 bfd_boolean overflow;
280 bfd_vma v;
282 /* Our own version of strtoul, for a bfd_vma. */
290 {
293 }
297 {
299 {
302 }
303 else
304 {
307 }
308 }
316 {
326 else
333 {
336 }
337 }
340 {
344 }
345 }
347 /* If we get here, the number is too large to represent in a
348 bfd_vma. */
352 else
356 }
358 /* Give an error for a bad stab string. */
360 static void
363 {
365 }
367 /* Warn about something in a stab string. */
369 static void
373 {
375 }
377 /* Create a handle to parse stabs symbols with. */
379 PTR
381 PTR dhandle ATTRIBUTE_UNUSED;
383 bfd_boolean sections;
386 {
400 }
402 /* When we have processed all the stabs information, we need to go
403 through and fill in all the undefined tags. */
405 bfd_boolean
407 PTR dhandle;
408 PTR handle;
409 {
414 {
420 }
423 {
432 }
435 }
437 /* Handle a single stabs symbol. */
439 bfd_boolean
441 PTR dhandle;
442 PTR handle;
445 bfd_vma value;
447 {
450 /* gcc will emit two N_SO strings per compilation unit, one for the
451 directory name and one for the file name. We just collect N_SO
452 strings as we see them, and start the new compilation unit when
453 we see a non N_SO symbol. */
456 {
464 /* Generally, for stabs in the symbol table, the N_LBRAC and
465 N_RBRAC symbols are relative to the N_SO symbol value. */
469 /* We need to reset the mapping from type numbers to types. We
470 can't free the old mapping, because of the use of
471 debug_make_indirect_type. */
479 /* Now process whatever type we just got. */
480 }
483 {
489 /* Ignore extra outermost context from SunPRO cc and acc. */
494 {
497 }
499 /* Start an inner lexical block. */
501 (value
506 /* Emit any pending variable definitions. */
514 /* Ignore extra outermost context from SunPRO cc and acc. */
518 /* We shouldn't have any pending variable definitions here, but,
519 if we do, we probably need to emit them before closing the
520 block. */
524 /* End an inner lexical block. */
526 (value
533 {
536 }
540 /* This always ends a function. */
542 {
543 bfd_vma endval;
555 }
557 /* An empty string is emitted by gcc at the end of a compilation
558 unit. */
562 /* Just accumulate strings until we see a non N_SO symbol. If
563 the string starts with a directory separator or some other
564 form of absolute path specification, we discard the previously
565 accumulated strings. */
568 else
569 {
576 else
580 }
587 /* Start an include file. */
593 /* Start an include file which may be replaced. */
600 /* End an N_BINCL include. */
606 /* This is a duplicate of a header file named by N_BINCL which
607 was eliminated by the linker. */
631 {
633 {
634 /* This always marks the end of a function; we don't
635 need to worry about info->function_end. */
643 }
645 }
647 /* A const static symbol in the .text section will have an N_FUN
648 entry. We need to use these to mark the end of the function,
649 in case we are looking at gcc output before it was changed to
650 always emit an empty N_FUN. We can't call debug_end_function
651 here, because it might be a local static symbol. */
657 /* Fall through. */
658 /* FIXME: gdb checks the string for N_STSYM, N_LCSYM or N_ROSYM
659 symbols, and if it does not start with :S, gdb relocates the
660 value to the start of the section. gcc always seems to use
661 :S, so we don't worry about this. */
662 /* Fall through. */
664 {
670 {
672 {
673 bfd_vma endval;
683 }
684 /* For stabs in sections, line numbers and block addresses
685 are offsets from the start of the function. */
689 }
693 }
701 else
710 }
713 }
715 /* Parse the stabs string. */
717 static bfd_boolean
719 PTR dhandle;
723 bfd_vma value;
725 {
729 debug_type dtype;
730 bfd_boolean synonym;
731 bfd_boolean self_crossref;
740 {
744 {
747 }
748 }
750 /* GCC 2.x puts the line number in desc. SunOS apparently puts in
751 the number of bytes occupied by a type or object, which we
752 ignore. */
755 else
758 /* FIXME: Sometimes the special C++ names start with '.'. */
761 {
763 {
768 /* Was: name = "vptr"; */
774 /* This was an anonymous type that was never fixed up. */
777 /* SunPRO (3.0 at least) static variable encoding. */
782 }
783 }
786 {
789 else
791 }
796 else
800 {
802 /* c is a special case, not followed by a type-number.
803 SYMBOL:c=iVALUE for an integer constant symbol.
804 SYMBOL:c=rVALUE for a floating constant symbol.
805 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
806 e.g. "b:c=e6,0" for "const b = blob1"
807 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
809 {
812 }
815 {
817 /* Floating point constant. */
822 /* Integer constant. */
823 /* Defining integer constants this way is kind of silly,
824 since 'e' constants allows the compiler to give not only
825 the value, but the type as well. C has at least int,
826 long, unsigned int, and long long as constant types;
827 other languages probably should have at least unsigned as
828 well as signed constants. */
833 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
834 can be represented as integral.
835 e.g. "b:c=e6,0" for "const b = blob1"
836 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
842 {
845 }
852 }
857 /* The name of a caught exception. */
868 /* A function definition. */
876 /* Sun acc puts declared types of arguments here. We don't care
877 about their actual types (FIXME -- we should remember the whole
878 function prototype), but the list may define some new types
879 that we have to remember, so we must scan it now. */
881 {
887 }
892 {
897 /* A global symbol. The value must be extracted from the
898 symbol table. */
905 {
913 }
917 value))
919 }
922 /* This case is faked by a conditional above, when there is no
923 code letter in the dbx data. Dbx data never actually
924 contains 'l'. */
932 value))
937 /* A function parameter. */
941 else
942 {
943 /* pF is a two-letter code that means a function parameter in
944 Fortran. The type-number specifies the type of the return
945 value. Translate it into a pointer-to-function type. */
950 {
951 debug_type ftype;
956 }
957 }
961 value))
964 /* FIXME: At this point gdb considers rearranging the parameter
965 address on a big endian machine if it is smaller than an int.
966 We have no way to do that, since we don't really know much
967 about the target. */
973 {
974 /* Prototype of a function referenced by this file. */
976 {
982 }
984 }
985 /* Fall through. */
987 /* Parameter which is in a register. */
993 value))
998 /* Register variable (either global or local). */
1004 value))
1007 /* FIXME: At this point gdb checks to combine pairs of 'p' and
1008 'r' stabs into a single 'P' stab. */
1013 /* Static symbol at top level of file */
1019 value))
1024 /* A typedef. */
1029 {
1030 /* A nameless type. Nothing to do. */
1032 }
1044 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1045 by 't' which means we are typedef'ing it as well. */
1047 {
1049 /* FIXME: gdb sets synonym to TRUE if the current language
1050 is C++. */
1051 }
1052 else
1053 {
1056 }
1064 /* INFO->SELF_CROSSREF is set by parse_stab_type if this type is
1065 a cross reference to itself. These are generated by some
1066 versions of g++. */
1075 /* See if we have a cross reference to this tag which we can now
1076 fill in. Avoid filling in a cross reference to ourselves,
1077 because that would lead to circular debugging information. */
1079 {
1083 {
1086 {
1090 }
1091 }
1092 }
1095 {
1102 }
1107 /* Static symbol of local scope */
1112 /* FIXME: gdb checks os9k_stabs here. */
1119 /* Reference parameter. */
1125 value))
1130 /* Reference parameter which is in a register. */
1136 value))
1141 /* This is used by Sun FORTRAN for "function result value".
1142 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1143 that Pascal uses it too, but when I tried it Pascal used
1144 "x:3" (local symbol) instead. */
1150 value))
1157 }
1159 /* FIXME: gdb converts structure values to structure pointers in a
1160 couple of cases, depending upon the target. */
1163 }
1165 /* Parse a stabs type. The typename argument is non-NULL if this is a
1166 typedef or a tag definition. The pp argument points to the stab
1167 string, and is updated. The slotp argument points to a place to
1168 store the slot used if the type is being defined. */
1170 static debug_type
1172 PTR dhandle;
1177 {
1181 bfd_boolean stringp;
1183 debug_type dtype;
1195 /* Read type number if present. The type number may be omitted.
1196 for instance in a two-dimensional array declared with type
1197 "ar1;1;10;ar1;1;10;4". */
1199 {
1200 /* 'typenums=' not present, type is anonymous. Read and return
1201 the definition, but don't put it in the type vector. */
1203 }
1204 else
1205 {
1210 {
1211 /* Type is not being defined here. Either it already
1212 exists, or this is a forward reference to it. */
1214 }
1216 /* Only set the slot if the type is being defined. This means
1217 that the mapping from type numbers to types will only record
1218 the name of the typedef which defines a type. If we don't do
1219 this, then something like
1220 typedef int foo;
1221 int i;
1222 will record that i is of type foo. Unfortunately, stabs
1223 information is ambiguous about variable types. For this code,
1224 typedef int foo;
1225 int i;
1226 foo j;
1227 the stabs information records both i and j as having the same
1228 type. This could be fixed by patching the compiler. */
1232 /* Type is being defined here. */
1233 /* Skip the '='. */
1237 {
1242 {
1243 /* Member type. */
1245 }
1247 /* Type attributes. */
1251 {
1253 {
1256 }
1257 }
1261 {
1274 /* Ignore unrecognized type attributes, so future
1275 compilers can invent new ones. */
1277 }
1278 }
1279 }
1285 {
1287 {
1291 /* A cross reference to another type. */
1294 {
1305 /* Complain and keep going, so compilers can invent new
1306 cross-reference types. */
1310 }
1316 {
1319 }
1321 {
1325 {
1332 }
1335 {
1338 }
1339 }
1341 /* Some versions of g++ can emit stabs like
1342 fleep:T20=xsfleep:
1343 which define structures in terms of themselves. We need to
1344 tell the caller to avoid building a circular structure. */
1353 }
1368 {
1372 /* This type is defined as another type. */
1377 /* Peek ahead at the number to detect void. */
1382 {
1383 /* This type is being defined as itself, which means that
1384 it is void. */
1386 }
1387 else
1388 {
1391 /* Go back to the number and have parse_stab_type get it.
1392 This means that we can deal with something like
1393 t(1,2)=(3,4)=... which the Lucid compiler uses. */
1398 }
1401 {
1404 }
1407 }
1413 pp,
1418 /* Reference to another type. */
1419 dtype = (debug_make_reference_type
1426 /* Function returning another type. */
1427 /* FIXME: gdb checks os9k_stabs here. */
1428 dtype = (debug_make_function_type
1436 /* Const qualifier on some type (Sun). */
1437 /* FIXME: gdb accepts 'c' here if os9k_stabs. */
1441 pp,
1446 /* Volatile qual on some type (Sun). */
1447 /* FIXME: gdb accepts 'i' here if os9k_stabs. */
1448 dtype = (debug_make_volatile_type
1455 /* Offset (class & variable) type. This is used for a pointer
1456 relative to an object. */
1457 {
1458 debug_type domain;
1459 debug_type memtype;
1461 /* Member type. */
1469 {
1472 }
1481 }
1485 /* Method (class & fn) type. */
1487 {
1488 debug_type return_type;
1496 {
1499 }
1502 DEBUG_TYPE_NULL,
1504 }
1505 else
1506 {
1507 debug_type domain;
1508 debug_type return_type;
1512 bfd_boolean varargs;
1520 {
1523 }
1535 {
1537 {
1540 }
1544 {
1548 }
1555 }
1558 /* If the last type is not void, then this function takes a
1559 variable number of arguments. Otherwise, we must strip
1560 the void type. */
1564 else
1565 {
1568 }
1573 varargs);
1574 }
1578 /* Range type. */
1583 /* FIXME: gdb checks os9k_stabs here. */
1584 /* Sun ACC builtin int type. */
1589 /* Sun ACC builtin float type. */
1594 /* Enumeration type. */
1600 /* Struct or union type. */
1606 /* Array type. */
1608 {
1611 }
1621 pp,
1623 stringp);
1629 }
1635 {
1638 }
1641 {
1644 }
1647 }
1649 /* Read a number by which a type is referred to in dbx data, or
1650 perhaps read a pair (FILENUM, TYPENUM) in parentheses. Just a
1651 single number N is equivalent to (0,N). Return the two numbers by
1652 storing them in the vector TYPENUMS. */
1654 static bfd_boolean
1658 {
1664 {
1667 }
1668 else
1669 {
1673 {
1676 }
1680 {
1683 }
1685 }
1688 }
1690 /* Parse a range type. */
1692 static debug_type
1694 PTR dhandle;
1699 {
1702 bfd_boolean self_subrange;
1703 debug_type index_type;
1712 /* First comes a type we are a subrange of.
1713 In C it is usually 0, 1 or the type being defined. */
1721 {
1727 }
1732 /* The remaining two operands are usually lower and upper bounds of
1733 the range. But in some special cases they mean something else. */
1737 {
1740 }
1746 {
1749 }
1753 {
1754 /* gcc will emit range stabs for long long types. Handle this
1755 as a special case. FIXME: This needs to be more general. */
1760 {
1768 }
1771 }
1774 {
1775 /* A type defined as a subrange of itself, with both bounds 0,
1776 is void. */
1780 /* A type defined as a subrange of itself, with n2 positive and
1781 n3 zero, is a complex type, and n2 is the number of bytes. */
1785 /* If n3 is zero and n2 is positive, this is a floating point
1786 type, and n2 is the number of bytes. */
1790 /* If the upper bound is -1, this is an unsigned int. */
1792 {
1793 /* When gcc is used with -gstabs, but not -gstabs+, it will emit
1794 long long int:t6=r1;0;-1;
1795 long long unsigned int:t7=r1;0;-1;
1796 We hack here to handle this reasonably. */
1798 {
1803 }
1804 /* FIXME: The size here really depends upon the target. */
1806 }
1808 /* A range of 0 to 127 is char. */
1812 /* FIXME: gdb checks for the language CHILL here. */
1815 {
1824 #ifdef BFD64
1827 #endif
1828 }
1834 {
1841 #ifdef BFD64
1844 #endif
1845 }
1846 }
1848 /* At this point I don't have the faintest idea how to deal with a
1849 self_subrange type; I'm going to assume that this is used as an
1850 idiom, and that all of them are special cases. So . . . */
1852 {
1855 }
1859 {
1860 /* Does this actually ever happen? Is that why we are worrying
1861 about dealing with it rather than just calling error_type? */
1864 }
1867 }
1869 /* Sun's ACC uses a somewhat saner method for specifying the builtin
1870 typedefs in every file (for int, long, etc):
1872 type = b <signed> <width>; <offset>; <nbits>
1873 signed = u or s. Possible c in addition to u or s (for char?).
1874 offset = offset from high order bit to start bit of type.
1875 width is # bytes in object of this type, nbits is # bits in type.
1877 The width/offset stuff appears to be for small objects stored in
1878 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
1879 FIXME. */
1881 static debug_type
1883 PTR dhandle;
1885 {
1887 bfd_boolean unsignedp;
1888 bfd_vma bits;
1893 {
1903 }
1906 /* For some odd reason, all forms of char put a c here. This is strange
1907 because no other type has this honor. We can safely ignore this because
1908 we actually determine 'char'acterness by the number of bits specified in
1909 the descriptor. */
1913 /* The first number appears to be the number of bytes occupied
1914 by this type, except that unsigned short is 4 instead of 2.
1915 Since this information is redundant with the third number,
1916 we will ignore it. */
1919 {
1922 }
1925 /* The second number is always 0, so ignore it too. */
1928 {
1931 }
1934 /* The third number is the number of bits for this type. */
1937 /* The type *should* end with a semicolon. If it are embedded
1938 in a larger type the semicolon may be the only way to know where
1939 the type ends. If this type is at the end of the stabstring we
1940 can deal with the omitted semicolon (but we don't have to like
1941 it). Don't bother to complain(), Sun's compiler omits the semicolon
1942 for "void". */
1950 }
1952 /* Parse a builtin floating type generated by the Sun compiler. */
1954 static debug_type
1956 PTR dhandle;
1958 {
1960 bfd_vma details;
1961 bfd_vma bytes;
1965 /* The first number has more details about the type, for example
1966 FN_COMPLEX. */
1969 {
1972 }
1974 /* The second number is the number of bytes occupied by this type */
1977 {
1980 }
1988 }
1990 /* Handle an enum type. */
1992 static debug_type
1994 PTR dhandle;
1996 {
2005 /* FIXME: gdb checks os9k_stabs here. */
2007 /* The aix4 compiler emits an extra field before the enum members;
2008 my guess is it's a type of some sort. Just ignore it. */
2010 {
2014 }
2016 /* Read the value-names and their values.
2017 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
2018 A semicolon or comma instead of a NAME means the end. */
2024 {
2027 bfd_signed_vma val;
2038 {
2041 }
2045 {
2051 }
2056 }
2065 }
2067 /* Read the description of a structure (or union type) and return an object
2068 describing the type.
2070 PP points to a character pointer that points to the next unconsumed token
2071 in the the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
2072 *PP will point to "4a:1,0,32;;". */
2074 static debug_type
2076 PTR dhandle;
2080 bfd_boolean structp;
2082 {
2084 bfd_vma size;
2087 bfd_boolean statics;
2089 debug_type vptrbase;
2090 bfd_boolean ownvptr;
2094 /* Get the size. */
2097 /* Get the other information. */
2114 }
2116 /* The stabs for C++ derived classes contain baseclass information which
2117 is marked by a '!' character after the total size. This function is
2118 called when we encounter the baseclass marker, and slurps up all the
2119 baseclass information.
2121 Immediately following the '!' marker is the number of base classes that
2122 the class is derived from, followed by information for each base class.
2123 For each base class, there are two visibility specifiers, a bit offset
2124 to the base class information within the derived class, a reference to
2125 the type for the base class, and a terminating semicolon.
2127 A typical example, with two base classes, would be "!2,020,19;0264,21;".
2128 ^^ ^ ^ ^ ^ ^ ^
2129 Baseclass information marker __________________|| | | | | | |
2130 Number of baseclasses __________________________| | | | | | |
2131 Visibility specifiers (2) ________________________| | | | | |
2132 Offset in bits from start of class _________________| | | | |
2133 Type number for base class ___________________________| | | |
2134 Visibility specifiers (2) _______________________________| | |
2135 Offset in bits from start of class ________________________| |
2136 Type number of base class ____________________________________|
2138 Return TRUE for success, FALSE for failure. */
2140 static bfd_boolean
2142 PTR dhandle;
2146 {
2156 {
2157 /* No base classes. */
2159 }
2165 {
2168 }
2174 {
2177 bfd_vma bitpos;
2178 debug_type type;
2181 {
2192 }
2196 {
2210 }
2213 /* The remaining value is the bit offset of the portion of the
2214 object corresponding to this baseclass. Always zero in the
2215 absence of multiple inheritance. */
2218 {
2221 }
2230 visibility);
2237 }
2244 }
2246 /* Read struct or class data fields. They have the form:
2248 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2250 At the end, we see a semicolon instead of a field.
2252 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2253 a static field.
2255 The optional VISIBILITY is one of:
2257 '/0' (VISIBILITY_PRIVATE)
2258 '/1' (VISIBILITY_PROTECTED)
2259 '/2' (VISIBILITY_PUBLIC)
2260 '/9' (VISIBILITY_IGNORE)
2262 or nothing, for C style fields with public visibility.
2264 Returns 1 for success, 0 for failure. */
2266 static bfd_boolean
2268 PTR dhandle;
2273 {
2289 {
2290 /* FIXME: gdb checks os9k_stabs here. */
2294 /* Add 1 to c to leave room for NULL pointer at end. */
2296 {
2300 }
2302 /* If it starts with CPLUS_MARKER it is a special abbreviation,
2303 unless the CPLUS_MARKER is followed by an underscore, in
2304 which case it is just the name of an anonymous type, which we
2305 should handle like any other type name. We accept either '$'
2306 or '.', because a field name can never contain one of these
2307 characters except as a CPLUS_MARKER. */
2310 {
2316 }
2318 /* Look for the ':' that separates the field name from the field
2319 values. Data members are delimited by a single ':', while member
2320 functions are delimited by a pair of ':'s. When we hit the member
2321 functions (if any), terminate scan loop and return. */
2325 {
2328 }
2334 staticsp))
2338 }
2345 }
2347 /* Special GNU C++ name. */
2349 static bfd_boolean
2351 PTR dhandle;
2355 {
2358 debug_type context;
2361 debug_type type;
2362 bfd_vma bitpos;
2369 {
2372 }
2378 /* At this point, *pp points to something like "22:23=*22...", where
2379 the type number before the ':' is the "context" and everything
2380 after is a regular type definition. Lookup the type, find it's
2381 name, and construct the field name. */
2389 {
2391 /* $vf -- a virtual function table pointer. */
2395 /* $vb -- a virtual bsomethingorother */
2398 {
2401 }
2408 }
2411 {
2414 }
2420 {
2423 }
2428 {
2431 }
2435 DEBUG_VISIBILITY_PRIVATE);
2440 }
2442 /* Parse a single field in a struct or union. */
2444 static bfd_boolean
2446 PTR dhandle;
2452 {
2456 debug_type type;
2457 bfd_vma bitpos;
2458 bfd_vma bitsize;
2462 /* FIXME: gdb checks ARM_DEMANGLING here. */
2470 else
2471 {
2474 {
2488 }
2490 }
2498 {
2501 /* This is a static class member. */
2505 {
2508 }
2515 visibility);
2519 }
2522 {
2525 }
2530 {
2533 }
2538 {
2541 }
2545 {
2546 /* This can happen in two cases: (1) at least for gcc 2.4.5 or
2547 so, it is a field which has been optimized out. The correct
2548 stab for this case is to use VISIBILITY_IGNORE, but that is a
2549 recent invention. (2) It is a 0-size array. For example
2550 union { int num; char str[0]; } foo. Printing "<no value>"
2551 for str in "p foo" is OK, since foo.str (and thus foo.str[3])
2552 will continue to work, and a 0-size array as a whole doesn't
2553 have any contents to print.
2555 I suspect this probably could also happen with gcc -gstabs
2556 (not -gstabs+) for static fields, and perhaps other C++
2557 extensions. Hopefully few people use -gstabs with gdb, since
2558 it is intended for dbx compatibility. */
2560 }
2562 /* FIXME: gdb does some stuff here to mark fields as unpacked. */
2567 }
2569 /* Read member function stabs info for C++ classes. The form of each member
2570 function data is:
2572 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2574 An example with two member functions is:
2576 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2578 For the case of overloaded operators, the format is op$::*.funcs, where
2579 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2580 name (such as `+=') and `.' marks the end of the operator name. */
2582 static bfd_boolean
2584 PTR dhandle;
2590 {
2605 {
2611 debug_type look_ahead_type;
2617 /* FIXME: Some systems use something other than '$' here. */
2619 {
2622 }
2623 else
2624 {
2625 /* This is a completely wierd case. In order to stuff in the
2626 names that might contain colons (the usual name delimiter),
2627 Mike Tiemann defined a different name format which is
2628 signalled if the identifier is "op$". In that case, the
2629 format is "op$::XXXX." where XXXX is the name. This is
2630 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2633 ;
2635 {
2638 }
2641 }
2650 do
2651 {
2652 debug_type type;
2653 bfd_boolean stub;
2657 bfd_vma voffset;
2658 debug_type context;
2660 bfd_boolean varargs;
2663 {
2664 /* g++ version 1 kludge */
2667 }
2668 else
2669 {
2675 {
2678 }
2679 }
2684 {
2687 }
2698 {
2708 }
2714 {
2716 /* Normal function. */
2720 /* const member function. */
2725 /* volatile member function. */
2730 /* const volatile member function. */
2738 /* File compiled with g++ version 1; no information. */
2743 }
2747 {
2749 /* virtual member function, followed by index. The sign
2750 bit is supposedly set to distinguish
2751 pointers-to-methods from virtual function indicies. */
2755 {
2758 }
2763 {
2764 /* Must be g++ version 1. */
2766 }
2767 else
2768 {
2769 /* Figure out from whence this virtual function
2770 came. It may belong to virtual function table of
2771 one of its baseclasses. */
2774 pp,
2777 {
2778 /* g++ version 1 overloaded methods. */
2780 }
2781 else
2782 {
2786 {
2789 }
2791 }
2792 }
2796 /* static member function. */
2816 }
2818 /* If the type is not a stub, then the argtypes string is
2819 the physical name of the function. Otherwise the
2820 argtypes string is the mangled form of the argument
2821 types, and the full type and the physical name must be
2822 extracted from them. */
2825 else
2826 {
2834 {
2837 }
2843 }
2846 {
2851 }
2858 else
2860 physname,
2861 type,
2862 visibility,
2863 constp,
2864 volatilep);
2869 }
2878 {
2882 }
2887 }
2895 }
2897 /* Parse a string representing argument types for a method. Stabs
2898 tries to save space by packing argument types into a mangled
2899 string. This string should give us enough information to extract
2900 both argument types and the physical name of the function, given
2901 the tag name. */
2903 static debug_type
2906 PTR dhandle;
2908 debug_type class_type;
2911 debug_type return_type;
2913 bfd_boolean constp;
2914 bfd_boolean volatilep;
2916 {
2917 bfd_boolean is_full_physname_constructor;
2918 bfd_boolean is_constructor;
2919 bfd_boolean is_destructor;
2921 bfd_boolean varargs;
2924 /* Constructors are sometimes handled specially. */
2932 is_constructor = (is_full_physname_constructor
2942 else
2943 {
2958 {
2959 /* Template methods are fully mangled. */
2963 }
2964 else
2969 + len
2976 {
2981 {
2984 }
2989 }
2990 else
2991 {
2995 else
2997 }
3006 }
3009 {
3013 FALSE);
3014 }
3021 varargs);
3022 }
3024 /* The tail end of stabs for C++ classes that contain a virtual function
3025 pointer contains a tilde, a %, and a type number.
3026 The type number refers to the base class (possibly this class itself) which
3027 contains the vtable pointer for the current class.
3029 This function is called when we have parsed all the method declarations,
3030 so we can look for the vptr base class info. */
3032 static bfd_boolean
3034 PTR dhandle;
3040 {
3050 /* If we are positioned at a ';', then skip it. */
3060 {
3061 /* Obsolete flags that used to indicate the presence of
3062 constructors and/or destructors. */
3064 }
3073 /* The next number is the type number of the base class (possibly
3074 our own class) which supplies the vtable for this class. */
3081 else
3082 {
3083 debug_type vtype;
3091 ;
3093 {
3096 }
3101 }
3104 }
3106 /* Read a definition of an array type. */
3108 static debug_type
3110 PTR dhandle;
3113 bfd_boolean stringp;
3114 {
3118 debug_type index_type;
3119 bfd_boolean adjustable;
3121 debug_type element_type;
3123 /* Format of an array type:
3124 "ar<index type>;lower;upper;<array_contents_type>".
3125 OS9000: "arlower,upper;<array_contents_type>".
3127 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3128 for these, produce a type like float[][]. */
3132 /* FIXME: gdb checks os9k_stabs here. */
3134 /* If the index type is type 0, we take it as int. */
3139 {
3142 {
3146 }
3148 }
3149 else
3150 {
3153 }
3156 {
3159 }
3165 {
3168 }
3172 {
3175 }
3179 {
3182 }
3186 {
3189 }
3198 {
3201 }
3205 }
3207 /* This struct holds information about files we have seen using
3208 N_BINCL. */
3210 struct bincl_file
3211 {
3212 /* The next N_BINCL file. */
3214 /* The next N_BINCL on the stack. */
3216 /* The file name. */
3218 /* The hash value. */
3219 bfd_vma hash;
3220 /* The file index. */
3222 /* The list of types defined in this file. */
3224 };
3226 /* Start a new N_BINCL file, pushing it onto the stack. */
3228 static void
3232 bfd_vma hash;
3233 {
3252 }
3254 /* Finish an N_BINCL file, at an N_EINCL, popping the name off the
3255 stack. */
3260 {
3273 }
3275 /* Handle an N_EXCL: get the types from the corresponding N_BINCL. */
3277 static bfd_boolean
3281 bfd_vma hash;
3282 {
3295 {
3299 }
3304 }
3306 /* Handle a variable definition. gcc emits variable definitions for a
3307 block before the N_LBRAC, so we must hold onto them until we see
3308 it. The SunPRO compiler emits variable definitions after the
3309 N_LBRAC, so we can call debug_record_variable immediately. */
3311 static bfd_boolean
3313 PTR dhandle;
3316 debug_type type;
3318 bfd_vma val;
3319 {
3338 }
3340 /* Emit pending variable definitions. This is called after we see the
3341 N_LBRAC that starts the block. */
3343 static bfd_boolean
3345 PTR dhandle;
3347 {
3352 {
3361 }
3366 }
3368 /* Find the slot for a type in the database. */
3374 {
3383 {
3386 }
3388 {
3391 }
3396 {
3398 {
3401 }
3404 }
3406 {
3409 }
3412 }
3414 /* Find a type given a type number. If the type has not been
3415 allocated yet, create an indirect type. */
3417 static debug_type
3419 PTR dhandle;
3422 {
3426 {
3427 /* A negative type number indicates an XCOFF builtin type. */
3429 }
3439 }
3441 /* Record that a given type number refers to a given type. */
3443 static bfd_boolean
3445 PTR dhandle ATTRIBUTE_UNUSED;
3448 debug_type type;
3449 {
3456 /* gdb appears to ignore type redefinitions, so we do as well. */
3461 }
3463 /* Return an XCOFF builtin type. */
3465 static debug_type
3467 PTR dhandle;
3470 {
3471 debug_type rettype;
3475 {
3478 }
3483 {
3485 /* The size of this and all the other types are fixed, defined
3486 by the debugging format. */
3530 /* IEEE single precision (32 bit). */
3535 /* IEEE double precision (64 bit). */
3540 /* This is an IEEE double on the RS/6000, and different machines
3541 with different sizes for "long double" should use different
3542 negative type numbers. See stabs.texinfo. */
3563 /* FIXME */
3568 /* FIXME */
3589 /* Complex type consisting of two IEEE single precision values. */
3594 /* Complex type consisting of two IEEE double precision values. */
3611 /* FIXME */
3633 }
3640 }
3642 /* Find or create a tagged type. */
3644 static debug_type
3646 PTR dhandle;
3651 {
3653 debug_type dtype;
3658 /* We pass DEBUG_KIND_ILLEGAL because we want all tags in the same
3659 namespace. This is right for C, and I don't know how to handle
3660 other languages. FIXME. */
3663 {
3666 }
3668 /* We need to allocate an entry on the undefined tag list. */
3670 {
3673 {
3678 }
3679 }
3681 {
3691 }
3694 }
3695 \f
3696 /* In order to get the correct argument types for a stubbed method, we
3697 need to extract the argument types from a C++ mangled string.
3698 Since the argument types can refer back to the return type, this
3699 means that we must demangle the entire physical name. In gdb this
3700 is done by calling cplus_demangle and running the results back
3701 through the C++ expression parser. Since we have no expression
3702 parser, we must duplicate much of the work of cplus_demangle here.
3704 We assume that GNU style demangling is used, since this is only
3705 done for method stubs, and only g++ should output that form of
3706 debugging information. */
3708 /* This structure is used to hold a pointer to type information which
3709 demangling a string. */
3711 struct stab_demangle_typestring
3712 {
3713 /* The start of the type. This is not null terminated. */
3715 /* The length of the type. */
3717 };
3719 /* This structure is used to hold information while demangling a
3720 string. */
3722 struct stab_demangle_info
3723 {
3724 /* The debugging information handle. */
3725 PTR dhandle;
3726 /* The stab information handle. */
3728 /* The array of arguments we are building. */
3730 /* Whether the method takes a variable number of arguments. */
3731 bfd_boolean varargs;
3732 /* The array of types we have remembered. */
3734 /* The number of typestrings. */
3736 /* The number of typestring slots we have allocated. */
3738 };
3740 static void stab_bad_demangle
3742 static unsigned int stab_demangle_count
3744 static bfd_boolean stab_demangle_get_count
3746 static bfd_boolean stab_demangle_prefix
3748 static bfd_boolean stab_demangle_function_name
3750 static bfd_boolean stab_demangle_signature
3752 static bfd_boolean stab_demangle_qualified
3754 static bfd_boolean stab_demangle_template
3756 static bfd_boolean stab_demangle_class
3758 static bfd_boolean stab_demangle_args
3760 bfd_boolean *));
3761 static bfd_boolean stab_demangle_arg
3764 static bfd_boolean stab_demangle_type
3766 static bfd_boolean stab_demangle_fund_type
3768 static bfd_boolean stab_demangle_remember_type
3771 /* Warn about a bad demangling. */
3773 static void
3776 {
3778 }
3780 /* Get a count from a stab string. */
3782 static unsigned int
3785 {
3790 {
3794 }
3796 }
3798 /* Require a count in a string. The count may be multiple digits, in
3799 which case it must end in an underscore. */
3801 static bfd_boolean
3805 {
3812 {
3818 do
3819 {
3823 }
3826 {
3829 }
3830 }
3833 }
3835 /* This function demangles a physical name, returning a NULL
3836 terminated array of argument types. */
3840 PTR dhandle;
3845 {
3858 /* cplus_demangle checks for special GNU mangled forms, but we can't
3859 see any of them in mangled method argument types. */
3865 {
3868 }
3879 error_return:
3883 }
3885 /* Demangle the prefix of the mangled name. */
3887 static bfd_boolean
3892 {
3896 /* cplus_demangle checks for global constructors and destructors,
3897 but we can't see them in mangled argument types. */
3901 else
3902 {
3903 /* Look for `__'. */
3905 do
3910 {
3913 }
3917 /* We found `__'; move ahead to the last contiguous `__' pair. */
3921 }
3927 {
3928 /* This is a GNU style constructor name. */
3931 }
3935 {
3936 /* Look for the `__' that separates the prefix from the
3937 signature. */
3942 {
3945 }
3948 }
3950 {
3951 /* The name doesn't start with `__', but it does contain `__'. */
3953 }
3954 else
3955 {
3958 }
3959 /*NOTREACHED*/
3960 }
3962 /* Demangle a function name prefix. The scan argument points to the
3963 double underscore which separates the function name from the
3964 signature. */
3966 static bfd_boolean
3971 {
3974 /* The string from *pp to scan is the name of the function. We
3975 don't care about the name, since we just looking for argument
3976 types. However, for conversion operators, the name may include a
3977 type which we must remember in order to handle backreferences. */
3985 {
3988 /* This is a type conversion operator. */
3992 }
3997 {
4000 /* This is a type conversion operator. */
4004 }
4007 }
4009 /* Demangle the signature. This is where the argument types are
4010 found. */
4012 static bfd_boolean
4016 {
4028 {
4030 {
4041 /* Static member function. FIXME: Can this happen? */
4048 /* Const member function. */
4066 /* Function. I don't know if this actually happens with g++
4067 output. */
4076 /* Template. */
4087 /* At the outermost level, we cannot have a return type
4088 specified, so if we run into another '_' at this point we
4089 are dealing with a mangled name that is either bogus, or
4090 has been mangled by some algorithm we don't know how to
4091 deal with. So just reject the entire demangling. */
4096 /* Assume we have stumbled onto the first outermost function
4097 argument token, and start processing args. */
4102 }
4105 {
4109 }
4110 }
4113 {
4114 /* With GNU style demangling, bar__3foo is 'foo::bar(void)', and
4115 bar__3fooi is 'foo::bar(int)'. We get here when we find the
4116 first case, and need to ensure that the '(void)' gets added
4117 to the current declp. */
4120 }
4123 }
4125 /* Demangle a qualified name, such as "Q25Outer5Inner" which is the
4126 mangled form of "Outer::Inner". */
4128 static bfd_boolean
4133 {
4137 debug_type context;
4142 {
4144 /* GNU mangled name with more than 9 classes. The count is
4145 preceded by an underscore (to distinguish it from the <= 9
4146 case) and followed by an underscore. */
4149 {
4152 }
4157 {
4160 }
4167 /* Skip an optional underscore after the count. */
4177 }
4181 /* Pick off the names. */
4183 {
4187 {
4195 {
4198 DEBUG_KIND_CLASS);
4202 }
4203 }
4204 else
4205 {
4210 {
4213 }
4216 {
4226 {
4229 /* Try to find the type by looking through the
4230 fields of context until we find a field with the
4231 same type. This ought to work for a class
4232 defined within a class, but it won't work for,
4233 e.g., an enum defined within a class. stabs does
4234 not give us enough information to figure out the
4235 latter case. */
4240 {
4241 debug_type ft;
4249 {
4252 }
4253 }
4256 }
4259 {
4260 /* We have to fall back on finding the type by name.
4261 If there are more types to come, then this must
4262 be a class. Otherwise, it could be anything. */
4265 {
4270 name);
4272 }
4275 {
4280 ? DEBUG_KIND_ILLEGAL
4284 }
4285 }
4286 }
4289 }
4290 }
4296 }
4298 /* Demangle a template. If PNAME is not NULL, this sets *PNAME to a
4299 string representation of the template. */
4301 static bfd_boolean
4306 {
4314 /* Skip the template name. */
4317 {
4320 }
4323 /* Get the size of the parameter list. */
4325 {
4328 }
4331 {
4333 {
4334 /* This is a type parameter. */
4338 }
4339 else
4340 {
4343 bfd_boolean done;
4353 /* This is a value parameter. */
4359 {
4361 {
4408 /* Assume it's a user defined integral type. */
4412 }
4413 }
4416 {
4421 }
4423 {
4430 {
4433 }
4434 }
4436 {
4441 {
4444 }
4445 }
4447 {
4453 {
4457 }
4459 {
4463 }
4464 }
4466 {
4470 {
4473 }
4475 }
4476 }
4477 }
4479 /* We can translate this to a string fairly easily by invoking the
4480 regular demangling routine. */
4482 {
4499 {
4504 }
4506 /* Eliminating all spaces, except those between > characters,
4507 makes it more likely that the demangled name will match the
4508 name which g++ used as the structure name. */
4517 }
4520 }
4522 /* Demangle a class name. */
4524 static bfd_boolean
4529 {
4537 {
4540 }
4548 }
4550 /* Demangle function arguments. If the pargs argument is not NULL, it
4551 is set to a NULL terminated array holding the arguments. */
4553 static bfd_boolean
4559 {
4567 {
4570 }
4574 {
4576 {
4585 else
4586 {
4588 {
4591 }
4592 }
4595 {
4598 }
4601 {
4604 }
4606 {
4612 }
4613 }
4614 else
4615 {
4618 }
4619 }
4625 {
4629 }
4632 }
4634 /* Demangle a single argument. */
4636 static bfd_boolean
4643 {
4645 debug_type type;
4654 {
4659 {
4663 }
4666 }
4669 }
4671 /* Demangle a type. If the ptype argument is not NULL, *ptype is set
4672 to the newly allocated type. */
4674 static bfd_boolean
4679 {
4685 {
4688 /* A pointer type. */
4697 /* A reference type. */
4706 /* An array. */
4707 {
4713 {
4715 {
4718 }
4722 }
4724 {
4727 }
4733 {
4734 debug_type int_type;
4741 }
4742 }
4746 /* A back reference to a remembered type. */
4747 {
4753 {
4756 }
4758 {
4761 }
4765 }
4769 /* A function. */
4770 {
4772 bfd_boolean varargs;
4784 {
4785 /* cplus_demangle will accept a function without a return
4786 type, but I don't know when that will happen, or what
4787 to do if it does. */
4790 }
4796 varargs);
4798 }
4803 {
4807 bfd_boolean varargs;
4819 {
4822 {
4825 }
4830 {
4834 DEBUG_KIND_CLASS);
4837 }
4838 }
4840 {
4846 }
4847 else
4848 {
4851 }
4854 {
4856 {
4859 }
4861 {
4864 }
4866 {
4869 }
4879 }
4882 {
4885 }
4892 {
4896 else
4897 {
4898 /* FIXME: We have no way to record constp or
4899 volatilep. */
4902 }
4903 }
4904 }
4922 {
4928 }
4935 }
4938 }
4940 /* Demangle a fundamental type. If the ptype argument is not NULL,
4941 *ptype is set to the newly allocated type. */
4943 static bfd_boolean
4948 {
4951 bfd_boolean done;
4962 {
4964 {
4988 }
4989 }
4992 {
4995 /* cplus_demangle permits this, but I don't know what it means. */
5001 {
5005 }
5011 {
5013 (unsignedp
5018 }
5024 {
5026 (unsignedp
5031 }
5037 {
5039 (unsignedp
5044 }
5050 {
5052 (unsignedp
5057 }
5063 {
5067 }
5073 {
5075 (unsignedp
5077 : (signedp
5082 }
5088 {
5092 }
5098 {
5102 }
5108 {
5112 }
5118 {
5122 }
5129 {
5132 }
5133 /* Fall through. */
5136 {
5142 {
5149 {
5150 /* FIXME: It is probably incorrect to assume that
5151 undefined types are tagged types. */
5154 DEBUG_KIND_ILLEGAL);
5157 }
5158 }
5159 }
5163 {
5170 {
5173 DEBUG_KIND_CLASS);
5177 }
5178 }
5184 }
5187 {
5192 }
5195 }
5197 /* Remember a type string in a demangled string. */
5199 static bfd_boolean
5204 {
5206 {
5212 }
5219 }