| blob | daea30142959683d96d41f0d6d983d9d9b71583f |
1 /* stabs.c -- Parse stabs debugging information
2 Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001
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>
29 #include <ctype.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 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 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 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 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 };
158 static boolean parse_stab_string
160 static debug_type parse_stab_type
162 debug_type **));
163 static boolean parse_stab_type_number
165 static debug_type parse_stab_range_type
169 static debug_type parse_stab_sun_floating_type
172 static debug_type parse_stab_struct_type
175 static boolean parse_stab_baseclasses
177 static boolean parse_stab_struct_fields
179 boolean *));
180 static boolean parse_stab_cpp_abbrev
182 static boolean parse_stab_one_struct_field
185 static boolean parse_stab_members
188 static debug_type parse_stab_argtypes
191 static boolean parse_stab_tilde_field
194 static debug_type parse_stab_array_type
198 static boolean find_excl
200 static boolean stab_record_variable
206 static debug_type stab_find_type
208 static boolean stab_record_type
210 static debug_type stab_xcoff_builtin_type
212 static debug_type stab_find_tagged_type
218 /* Save a string in memory. */
224 {
231 }
233 /* Read a number from a string. */
235 static bfd_vma
239 {
251 {
252 /* If bfd_vma is larger than unsigned long, and the number is
253 meant to be negative, we have to make sure that we sign
254 extend properly. */
258 }
260 /* Note that even though strtoul overflowed, it should have set *pp
261 to the end of the number, which is where we want it. */
264 {
266 boolean neg;
269 boolean overflow;
270 bfd_vma v;
272 /* Our own version of strtoul, for a bfd_vma. */
280 {
283 }
287 {
289 {
292 }
293 else
294 {
297 }
298 }
306 {
316 else
323 {
326 }
327 }
330 {
334 }
335 }
337 /* If we get here, the number is too large to represent in a
338 bfd_vma. */
342 else
346 }
348 /* Give an error for a bad stab string. */
350 static void
353 {
355 }
357 /* Warn about something in a stab string. */
359 static void
363 {
365 }
367 /* Create a handle to parse stabs symbols with. */
369 /*ARGSUSED*/
370 PTR
372 PTR dhandle ATTRIBUTE_UNUSED;
374 boolean sections;
377 {
391 }
393 /* When we have processed all the stabs information, we need to go
394 through and fill in all the undefined tags. */
396 boolean
398 PTR dhandle;
399 PTR handle;
400 {
405 {
411 }
414 {
423 }
426 }
428 /* Handle a single stabs symbol. */
430 boolean
432 PTR dhandle;
433 PTR handle;
436 bfd_vma value;
438 {
441 /* gcc will emit two N_SO strings per compilation unit, one for the
442 directory name and one for the file name. We just collect N_SO
443 strings as we see them, and start the new compilation unit when
444 we see a non N_SO symbol. */
447 {
455 /* Generally, for stabs in the symbol table, the N_LBRAC and
456 N_RBRAC symbols are relative to the N_SO symbol value. */
460 /* We need to reset the mapping from type numbers to types. We
461 can't free the old mapping, because of the use of
462 debug_make_indirect_type. */
470 /* Now process whatever type we just got. */
471 }
474 {
480 /* Ignore extra outermost context from SunPRO cc and acc. */
485 {
488 }
490 /* Start an inner lexical block. */
492 (value
497 /* Emit any pending variable definitions. */
505 /* Ignore extra outermost context from SunPRO cc and acc. */
509 /* We shouldn't have any pending variable definitions here, but,
510 if we do, we probably need to emit them before closing the
511 block. */
515 /* End an inner lexical block. */
517 (value
524 {
527 }
531 /* This always ends a function. */
533 {
534 bfd_vma endval;
546 }
548 /* An empty string is emitted by gcc at the end of a compilation
549 unit. */
553 /* Just accumulate strings until we see a non N_SO symbol. If
554 the string starts with a directory separator or some other
555 form of absolute path specification, we discard the previously
556 accumulated strings. */
559 else
560 {
567 else
571 }
578 /* Start an include file. */
584 /* Start an include file which may be replaced. */
591 /* End an N_BINCL include. */
597 /* This is a duplicate of a header file named by N_BINCL which
598 was eliminated by the linker. */
621 {
623 {
624 /* This always marks the end of a function; we don't
625 need to worry about info->function_end. */
633 }
635 }
637 /* A const static symbol in the .text section will have an N_FUN
638 entry. We need to use these to mark the end of the function,
639 in case we are looking at gcc output before it was changed to
640 always emit an empty N_FUN. We can't call debug_end_function
641 here, because it might be a local static symbol. */
647 /* Fall through. */
648 /* FIXME: gdb checks the string for N_STSYM, N_LCSYM or N_ROSYM
649 symbols, and if it does not start with :S, gdb relocates the
650 value to the start of the section. gcc always seems to use
651 :S, so we don't worry about this. */
652 /* Fall through. */
654 {
660 {
662 {
663 bfd_vma endval;
673 }
674 /* For stabs in sections, line numbers and block addresses
675 are offsets from the start of the function. */
679 }
683 }
691 else
700 }
703 }
705 /* Parse the stabs string. */
707 static boolean
709 PTR dhandle;
713 bfd_vma value;
715 {
719 debug_type dtype;
720 boolean synonym;
721 boolean self_crossref;
730 {
734 {
737 }
738 }
740 /* GCC 2.x puts the line number in desc. SunOS apparently puts in
741 the number of bytes occupied by a type or object, which we
742 ignore. */
745 else
748 /* FIXME: Sometimes the special C++ names start with '.'. */
751 {
753 {
758 /* Was: name = "vptr"; */
764 /* This was an anonymous type that was never fixed up. */
767 /* SunPRO (3.0 at least) static variable encoding. */
772 }
773 }
776 {
779 else
781 }
786 else
790 {
792 /* c is a special case, not followed by a type-number.
793 SYMBOL:c=iVALUE for an integer constant symbol.
794 SYMBOL:c=rVALUE for a floating constant symbol.
795 SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
796 e.g. "b:c=e6,0" for "const b = blob1"
797 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
799 {
802 }
805 {
807 /* Floating point constant. */
812 /* Integer constant. */
813 /* Defining integer constants this way is kind of silly,
814 since 'e' constants allows the compiler to give not only
815 the value, but the type as well. C has at least int,
816 long, unsigned int, and long long as constant types;
817 other languages probably should have at least unsigned as
818 well as signed constants. */
823 /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
824 can be represented as integral.
825 e.g. "b:c=e6,0" for "const b = blob1"
826 (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;"). */
832 {
835 }
842 }
847 /* The name of a caught exception. */
858 /* A function definition. */
866 /* Sun acc puts declared types of arguments here. We don't care
867 about their actual types (FIXME -- we should remember the whole
868 function prototype), but the list may define some new types
869 that we have to remember, so we must scan it now. */
871 {
877 }
882 {
887 /* A global symbol. The value must be extracted from the
888 symbol table. */
895 {
903 }
907 value))
909 }
912 /* This case is faked by a conditional above, when there is no
913 code letter in the dbx data. Dbx data never actually
914 contains 'l'. */
922 value))
927 /* A function parameter. */
931 else
932 {
933 /* pF is a two-letter code that means a function parameter in
934 Fortran. The type-number specifies the type of the return
935 value. Translate it into a pointer-to-function type. */
940 {
941 debug_type ftype;
946 }
947 }
951 value))
954 /* FIXME: At this point gdb considers rearranging the parameter
955 address on a big endian machine if it is smaller than an int.
956 We have no way to do that, since we don't really know much
957 about the target. */
963 {
964 /* Prototype of a function referenced by this file. */
966 {
972 }
974 }
975 /* Fall through. */
977 /* Parameter which is in a register. */
983 value))
988 /* Register variable (either global or local). */
994 value))
997 /* FIXME: At this point gdb checks to combine pairs of 'p' and
998 'r' stabs into a single 'P' stab. */
1003 /* Static symbol at top level of file */
1009 value))
1014 /* A typedef. */
1019 {
1020 /* A nameless type. Nothing to do. */
1022 }
1034 /* Struct, union, or enum tag. For GNU C++, this can be be followed
1035 by 't' which means we are typedef'ing it as well. */
1037 {
1039 /* FIXME: gdb sets synonym to true if the current language
1040 is C++. */
1041 }
1042 else
1043 {
1046 }
1054 /* INFO->SELF_CROSSREF is set by parse_stab_type if this type is
1055 a cross reference to itself. These are generated by some
1056 versions of g++. */
1065 /* See if we have a cross reference to this tag which we can now
1066 fill in. Avoid filling in a cross reference to ourselves,
1067 because that would lead to circular debugging information. */
1069 {
1073 {
1076 {
1080 }
1081 }
1082 }
1085 {
1092 }
1097 /* Static symbol of local scope */
1102 /* FIXME: gdb checks os9k_stabs here. */
1109 /* Reference parameter. */
1115 value))
1120 /* Reference parameter which is in a register. */
1126 value))
1131 /* This is used by Sun FORTRAN for "function result value".
1132 Sun claims ("dbx and dbxtool interfaces", 2nd ed)
1133 that Pascal uses it too, but when I tried it Pascal used
1134 "x:3" (local symbol) instead. */
1140 value))
1147 }
1149 /* FIXME: gdb converts structure values to structure pointers in a
1150 couple of cases, depending upon the target. */
1153 }
1155 /* Parse a stabs type. The typename argument is non-NULL if this is a
1156 typedef or a tag definition. The pp argument points to the stab
1157 string, and is updated. The slotp argument points to a place to
1158 store the slot used if the type is being defined. */
1160 static debug_type
1162 PTR dhandle;
1167 {
1171 boolean stringp;
1173 debug_type dtype;
1185 /* Read type number if present. The type number may be omitted.
1186 for instance in a two-dimensional array declared with type
1187 "ar1;1;10;ar1;1;10;4". */
1189 {
1190 /* 'typenums=' not present, type is anonymous. Read and return
1191 the definition, but don't put it in the type vector. */
1193 }
1194 else
1195 {
1200 {
1201 /* Type is not being defined here. Either it already
1202 exists, or this is a forward reference to it. */
1204 }
1206 /* Only set the slot if the type is being defined. This means
1207 that the mapping from type numbers to types will only record
1208 the name of the typedef which defines a type. If we don't do
1209 this, then something like
1210 typedef int foo;
1211 int i;
1212 will record that i is of type foo. Unfortunately, stabs
1213 information is ambiguous about variable types. For this code,
1214 typedef int foo;
1215 int i;
1216 foo j;
1217 the stabs information records both i and j as having the same
1218 type. This could be fixed by patching the compiler. */
1222 /* Type is being defined here. */
1223 /* Skip the '='. */
1227 {
1232 {
1233 /* Member type. */
1235 }
1237 /* Type attributes. */
1241 {
1243 {
1246 }
1247 }
1251 {
1264 /* Ignore unrecognized type attributes, so future
1265 compilers can invent new ones. */
1267 }
1268 }
1269 }
1275 {
1277 {
1281 /* A cross reference to another type. */
1284 {
1295 /* Complain and keep going, so compilers can invent new
1296 cross-reference types. */
1300 }
1306 {
1309 }
1311 {
1315 {
1322 }
1325 {
1328 }
1329 }
1331 /* Some versions of g++ can emit stabs like
1332 fleep:T20=xsfleep:
1333 which define structures in terms of themselves. We need to
1334 tell the caller to avoid building a circular structure. */
1343 }
1358 {
1362 /* This type is defined as another type. */
1367 /* Peek ahead at the number to detect void. */
1372 {
1373 /* This type is being defined as itself, which means that
1374 it is void. */
1376 }
1377 else
1378 {
1381 /* Go back to the number and have parse_stab_type get it.
1382 This means that we can deal with something like
1383 t(1,2)=(3,4)=... which the Lucid compiler uses. */
1388 }
1391 {
1394 }
1397 }
1403 pp,
1408 /* Reference to another type. */
1409 dtype = (debug_make_reference_type
1416 /* Function returning another type. */
1417 /* FIXME: gdb checks os9k_stabs here. */
1418 dtype = (debug_make_function_type
1426 /* Const qualifier on some type (Sun). */
1427 /* FIXME: gdb accepts 'c' here if os9k_stabs. */
1431 pp,
1436 /* Volatile qual on some type (Sun). */
1437 /* FIXME: gdb accepts 'i' here if os9k_stabs. */
1438 dtype = (debug_make_volatile_type
1445 /* Offset (class & variable) type. This is used for a pointer
1446 relative to an object. */
1447 {
1448 debug_type domain;
1449 debug_type memtype;
1451 /* Member type. */
1459 {
1462 }
1471 }
1475 /* Method (class & fn) type. */
1477 {
1478 debug_type return_type;
1486 {
1489 }
1492 DEBUG_TYPE_NULL,
1494 }
1495 else
1496 {
1497 debug_type domain;
1498 debug_type return_type;
1502 boolean varargs;
1510 {
1513 }
1525 {
1527 {
1530 }
1534 {
1538 }
1545 }
1548 /* If the last type is not void, then this function takes a
1549 variable number of arguments. Otherwise, we must strip
1550 the void type. */
1554 else
1555 {
1558 }
1563 varargs);
1564 }
1568 /* Range type. */
1573 /* FIXME: gdb checks os9k_stabs here. */
1574 /* Sun ACC builtin int type. */
1579 /* Sun ACC builtin float type. */
1584 /* Enumeration type. */
1590 /* Struct or union type. */
1596 /* Array type. */
1598 {
1601 }
1611 pp,
1613 stringp);
1619 }
1625 {
1628 }
1631 {
1634 }
1637 }
1639 /* Read a number by which a type is referred to in dbx data, or
1640 perhaps read a pair (FILENUM, TYPENUM) in parentheses. Just a
1641 single number N is equivalent to (0,N). Return the two numbers by
1642 storing them in the vector TYPENUMS. */
1644 static boolean
1648 {
1654 {
1657 }
1658 else
1659 {
1663 {
1666 }
1670 {
1673 }
1675 }
1678 }
1680 /* Parse a range type. */
1682 static debug_type
1684 PTR dhandle;
1689 {
1692 boolean self_subrange;
1693 debug_type index_type;
1702 /* First comes a type we are a subrange of.
1703 In C it is usually 0, 1 or the type being defined. */
1711 {
1717 }
1722 /* The remaining two operands are usually lower and upper bounds of
1723 the range. But in some special cases they mean something else. */
1727 {
1730 }
1736 {
1739 }
1743 {
1744 /* gcc will emit range stabs for long long types. Handle this
1745 as a special case. FIXME: This needs to be more general. */
1750 {
1758 }
1761 }
1764 {
1765 /* A type defined as a subrange of itself, with both bounds 0,
1766 is void. */
1770 /* A type defined as a subrange of itself, with n2 positive and
1771 n3 zero, is a complex type, and n2 is the number of bytes. */
1775 /* If n3 is zero and n2 is positive, this is a floating point
1776 type, and n2 is the number of bytes. */
1780 /* If the upper bound is -1, this is an unsigned int. */
1782 {
1783 /* When gcc is used with -gstabs, but not -gstabs+, it will emit
1784 long long int:t6=r1;0;-1;
1785 long long unsigned int:t7=r1;0;-1;
1786 We hack here to handle this reasonably. */
1788 {
1793 }
1794 /* FIXME: The size here really depends upon the target. */
1796 }
1798 /* A range of 0 to 127 is char. */
1802 /* FIXME: gdb checks for the language CHILL here. */
1805 {
1814 #ifdef BFD64
1817 #endif
1818 }
1824 {
1831 #ifdef BFD64
1834 #endif
1835 }
1836 }
1838 /* At this point I don't have the faintest idea how to deal with a
1839 self_subrange type; I'm going to assume that this is used as an
1840 idiom, and that all of them are special cases. So . . . */
1842 {
1845 }
1849 {
1850 /* Does this actually ever happen? Is that why we are worrying
1851 about dealing with it rather than just calling error_type? */
1854 }
1857 }
1859 /* Sun's ACC uses a somewhat saner method for specifying the builtin
1860 typedefs in every file (for int, long, etc):
1862 type = b <signed> <width>; <offset>; <nbits>
1863 signed = u or s. Possible c in addition to u or s (for char?).
1864 offset = offset from high order bit to start bit of type.
1865 width is # bytes in object of this type, nbits is # bits in type.
1867 The width/offset stuff appears to be for small objects stored in
1868 larger ones (e.g. `shorts' in `int' registers). We ignore it for now,
1869 FIXME. */
1871 static debug_type
1873 PTR dhandle;
1875 {
1877 boolean unsignedp;
1878 bfd_vma bits;
1883 {
1893 }
1896 /* For some odd reason, all forms of char put a c here. This is strange
1897 because no other type has this honor. We can safely ignore this because
1898 we actually determine 'char'acterness by the number of bits specified in
1899 the descriptor. */
1903 /* The first number appears to be the number of bytes occupied
1904 by this type, except that unsigned short is 4 instead of 2.
1905 Since this information is redundant with the third number,
1906 we will ignore it. */
1909 {
1912 }
1915 /* The second number is always 0, so ignore it too. */
1918 {
1921 }
1924 /* The third number is the number of bits for this type. */
1927 /* The type *should* end with a semicolon. If it are embedded
1928 in a larger type the semicolon may be the only way to know where
1929 the type ends. If this type is at the end of the stabstring we
1930 can deal with the omitted semicolon (but we don't have to like
1931 it). Don't bother to complain(), Sun's compiler omits the semicolon
1932 for "void". */
1940 }
1942 /* Parse a builtin floating type generated by the Sun compiler. */
1944 static debug_type
1946 PTR dhandle;
1948 {
1950 bfd_vma details;
1951 bfd_vma bytes;
1955 /* The first number has more details about the type, for example
1956 FN_COMPLEX. */
1959 {
1962 }
1964 /* The second number is the number of bytes occupied by this type */
1967 {
1970 }
1978 }
1980 /* Handle an enum type. */
1982 static debug_type
1984 PTR dhandle;
1986 {
1995 /* FIXME: gdb checks os9k_stabs here. */
1997 /* The aix4 compiler emits an extra field before the enum members;
1998 my guess is it's a type of some sort. Just ignore it. */
2000 {
2004 }
2006 /* Read the value-names and their values.
2007 The input syntax is NAME:VALUE,NAME:VALUE, and so on.
2008 A semicolon or comma instead of a NAME means the end. */
2014 {
2017 bfd_signed_vma val;
2028 {
2031 }
2035 {
2041 }
2046 }
2055 }
2057 /* Read the description of a structure (or union type) and return an object
2058 describing the type.
2060 PP points to a character pointer that points to the next unconsumed token
2061 in the the stabs string. For example, given stabs "A:T4=s4a:1,0,32;;",
2062 *PP will point to "4a:1,0,32;;". */
2064 static debug_type
2066 PTR dhandle;
2070 boolean structp;
2072 {
2074 bfd_vma size;
2077 boolean statics;
2079 debug_type vptrbase;
2080 boolean ownvptr;
2084 /* Get the size. */
2087 /* Get the other information. */
2104 }
2106 /* The stabs for C++ derived classes contain baseclass information which
2107 is marked by a '!' character after the total size. This function is
2108 called when we encounter the baseclass marker, and slurps up all the
2109 baseclass information.
2111 Immediately following the '!' marker is the number of base classes that
2112 the class is derived from, followed by information for each base class.
2113 For each base class, there are two visibility specifiers, a bit offset
2114 to the base class information within the derived class, a reference to
2115 the type for the base class, and a terminating semicolon.
2117 A typical example, with two base classes, would be "!2,020,19;0264,21;".
2118 ^^ ^ ^ ^ ^ ^ ^
2119 Baseclass information marker __________________|| | | | | | |
2120 Number of baseclasses __________________________| | | | | | |
2121 Visibility specifiers (2) ________________________| | | | | |
2122 Offset in bits from start of class _________________| | | | |
2123 Type number for base class ___________________________| | | |
2124 Visibility specifiers (2) _______________________________| | |
2125 Offset in bits from start of class ________________________| |
2126 Type number of base class ____________________________________|
2128 Return true for success, false for failure. */
2130 static boolean
2132 PTR dhandle;
2136 {
2146 {
2147 /* No base classes. */
2149 }
2155 {
2158 }
2164 {
2167 bfd_vma bitpos;
2168 debug_type type;
2171 {
2182 }
2186 {
2200 }
2203 /* The remaining value is the bit offset of the portion of the
2204 object corresponding to this baseclass. Always zero in the
2205 absence of multiple inheritance. */
2208 {
2211 }
2220 visibility);
2227 }
2234 }
2236 /* Read struct or class data fields. They have the form:
2238 NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;
2240 At the end, we see a semicolon instead of a field.
2242 In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
2243 a static field.
2245 The optional VISIBILITY is one of:
2247 '/0' (VISIBILITY_PRIVATE)
2248 '/1' (VISIBILITY_PROTECTED)
2249 '/2' (VISIBILITY_PUBLIC)
2250 '/9' (VISIBILITY_IGNORE)
2252 or nothing, for C style fields with public visibility.
2254 Returns 1 for success, 0 for failure. */
2256 static boolean
2258 PTR dhandle;
2263 {
2279 {
2280 /* FIXME: gdb checks os9k_stabs here. */
2284 /* Add 1 to c to leave room for NULL pointer at end. */
2286 {
2290 }
2292 /* If it starts with CPLUS_MARKER it is a special abbreviation,
2293 unless the CPLUS_MARKER is followed by an underscore, in
2294 which case it is just the name of an anonymous type, which we
2295 should handle like any other type name. We accept either '$'
2296 or '.', because a field name can never contain one of these
2297 characters except as a CPLUS_MARKER. */
2300 {
2306 }
2308 /* Look for the ':' that separates the field name from the field
2309 values. Data members are delimited by a single ':', while member
2310 functions are delimited by a pair of ':'s. When we hit the member
2311 functions (if any), terminate scan loop and return. */
2315 {
2318 }
2324 staticsp))
2328 }
2335 }
2337 /* Special GNU C++ name. */
2339 static boolean
2341 PTR dhandle;
2345 {
2348 debug_type context;
2351 debug_type type;
2352 bfd_vma bitpos;
2359 {
2362 }
2368 /* At this point, *pp points to something like "22:23=*22...", where
2369 the type number before the ':' is the "context" and everything
2370 after is a regular type definition. Lookup the type, find it's
2371 name, and construct the field name. */
2379 {
2381 /* $vf -- a virtual function table pointer. */
2385 /* $vb -- a virtual bsomethingorother */
2388 {
2391 }
2398 }
2401 {
2404 }
2410 {
2413 }
2418 {
2421 }
2425 DEBUG_VISIBILITY_PRIVATE);
2430 }
2432 /* Parse a single field in a struct or union. */
2434 static boolean
2436 PTR dhandle;
2442 {
2446 debug_type type;
2447 bfd_vma bitpos;
2448 bfd_vma bitsize;
2452 /* FIXME: gdb checks ARM_DEMANGLING here. */
2460 else
2461 {
2464 {
2478 }
2480 }
2488 {
2491 /* This is a static class member. */
2495 {
2498 }
2505 visibility);
2509 }
2512 {
2515 }
2520 {
2523 }
2528 {
2531 }
2535 {
2536 /* This can happen in two cases: (1) at least for gcc 2.4.5 or
2537 so, it is a field which has been optimized out. The correct
2538 stab for this case is to use VISIBILITY_IGNORE, but that is a
2539 recent invention. (2) It is a 0-size array. For example
2540 union { int num; char str[0]; } foo. Printing "<no value>"
2541 for str in "p foo" is OK, since foo.str (and thus foo.str[3])
2542 will continue to work, and a 0-size array as a whole doesn't
2543 have any contents to print.
2545 I suspect this probably could also happen with gcc -gstabs
2546 (not -gstabs+) for static fields, and perhaps other C++
2547 extensions. Hopefully few people use -gstabs with gdb, since
2548 it is intended for dbx compatibility. */
2550 }
2552 /* FIXME: gdb does some stuff here to mark fields as unpacked. */
2557 }
2559 /* Read member function stabs info for C++ classes. The form of each member
2560 function data is:
2562 NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;
2564 An example with two member functions is:
2566 afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;
2568 For the case of overloaded operators, the format is op$::*.funcs, where
2569 $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
2570 name (such as `+=') and `.' marks the end of the operator name. */
2572 static boolean
2574 PTR dhandle;
2580 {
2595 {
2601 debug_type look_ahead_type;
2607 /* FIXME: Some systems use something other than '$' here. */
2609 {
2612 }
2613 else
2614 {
2615 /* This is a completely wierd case. In order to stuff in the
2616 names that might contain colons (the usual name delimiter),
2617 Mike Tiemann defined a different name format which is
2618 signalled if the identifier is "op$". In that case, the
2619 format is "op$::XXXX." where XXXX is the name. This is
2620 used for names like "+" or "=". YUUUUUUUK! FIXME! */
2623 ;
2625 {
2628 }
2631 }
2640 do
2641 {
2642 debug_type type;
2643 boolean stub;
2647 bfd_vma voffset;
2648 debug_type context;
2650 boolean varargs;
2653 {
2654 /* g++ version 1 kludge */
2657 }
2658 else
2659 {
2665 {
2668 }
2669 }
2674 {
2677 }
2688 {
2698 }
2704 {
2706 /* Normal function. */
2710 /* const member function. */
2715 /* volatile member function. */
2720 /* const volatile member function. */
2728 /* File compiled with g++ version 1; no information. */
2733 }
2737 {
2739 /* virtual member function, followed by index. The sign
2740 bit is supposedly set to distinguish
2741 pointers-to-methods from virtual function indicies. */
2745 {
2748 }
2753 {
2754 /* Must be g++ version 1. */
2756 }
2757 else
2758 {
2759 /* Figure out from whence this virtual function
2760 came. It may belong to virtual function table of
2761 one of its baseclasses. */
2764 pp,
2767 {
2768 /* g++ version 1 overloaded methods. */
2770 }
2771 else
2772 {
2776 {
2779 }
2781 }
2782 }
2786 /* static member function. */
2806 }
2808 /* If the type is not a stub, then the argtypes string is
2809 the physical name of the function. Otherwise the
2810 argtypes string is the mangled form of the argument
2811 types, and the full type and the physical name must be
2812 extracted from them. */
2815 else
2816 {
2824 {
2827 }
2833 }
2836 {
2841 }
2848 else
2850 physname,
2851 type,
2852 visibility,
2853 constp,
2854 volatilep);
2859 }
2868 {
2872 }
2877 }
2885 }
2887 /* Parse a string representing argument types for a method. Stabs
2888 tries to save space by packing argument types into a mangled
2889 string. This string should give us enough information to extract
2890 both argument types and the physical name of the function, given
2891 the tag name. */
2893 static debug_type
2896 PTR dhandle;
2898 debug_type class_type;
2901 debug_type return_type;
2903 boolean constp;
2904 boolean volatilep;
2906 {
2907 boolean is_full_physname_constructor;
2908 boolean is_constructor;
2909 boolean is_destructor;
2911 boolean varargs;
2913 /* Constructors are sometimes handled specially. */
2921 is_constructor = (is_full_physname_constructor
2931 else
2932 {
2947 {
2948 /* Template methods are fully mangled. */
2952 }
2953 else
2958 + len
2965 {
2970 {
2973 }
2978 }
2979 else
2980 {
2984 else
2986 }
2994 }
2997 {
3002 }
3009 varargs);
3010 }
3012 /* The tail end of stabs for C++ classes that contain a virtual function
3013 pointer contains a tilde, a %, and a type number.
3014 The type number refers to the base class (possibly this class itself) which
3015 contains the vtable pointer for the current class.
3017 This function is called when we have parsed all the method declarations,
3018 so we can look for the vptr base class info. */
3020 static boolean
3022 PTR dhandle;
3028 {
3038 /* If we are positioned at a ';', then skip it. */
3048 {
3049 /* Obsolete flags that used to indicate the presence of
3050 constructors and/or destructors. */
3052 }
3061 /* The next number is the type number of the base class (possibly
3062 our own class) which supplies the vtable for this class. */
3069 else
3070 {
3071 debug_type vtype;
3079 ;
3081 {
3084 }
3089 }
3092 }
3094 /* Read a definition of an array type. */
3096 static debug_type
3098 PTR dhandle;
3101 boolean stringp;
3102 {
3106 debug_type index_type;
3107 boolean adjustable;
3109 debug_type element_type;
3111 /* Format of an array type:
3112 "ar<index type>;lower;upper;<array_contents_type>".
3113 OS9000: "arlower,upper;<array_contents_type>".
3115 Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
3116 for these, produce a type like float[][]. */
3120 /* FIXME: gdb checks os9k_stabs here. */
3122 /* If the index type is type 0, we take it as int. */
3127 {
3130 {
3134 }
3136 }
3137 else
3138 {
3141 }
3144 {
3147 }
3153 {
3156 }
3160 {
3163 }
3167 {
3170 }
3174 {
3177 }
3186 {
3189 }
3193 }
3195 /* This struct holds information about files we have seen using
3196 N_BINCL. */
3198 struct bincl_file
3199 {
3200 /* The next N_BINCL file. */
3202 /* The next N_BINCL on the stack. */
3204 /* The file name. */
3206 /* The hash value. */
3207 bfd_vma hash;
3208 /* The file index. */
3210 /* The list of types defined in this file. */
3212 };
3214 /* Start a new N_BINCL file, pushing it onto the stack. */
3216 static void
3220 bfd_vma hash;
3221 {
3240 }
3242 /* Finish an N_BINCL file, at an N_EINCL, popping the name off the
3243 stack. */
3248 {
3261 }
3263 /* Handle an N_EXCL: get the types from the corresponding N_BINCL. */
3265 static boolean
3269 bfd_vma hash;
3270 {
3283 {
3287 }
3292 }
3294 /* Handle a variable definition. gcc emits variable definitions for a
3295 block before the N_LBRAC, so we must hold onto them until we see
3296 it. The SunPRO compiler emits variable definitions after the
3297 N_LBRAC, so we can call debug_record_variable immediately. */
3299 static boolean
3301 PTR dhandle;
3304 debug_type type;
3306 bfd_vma val;
3307 {
3326 }
3328 /* Emit pending variable definitions. This is called after we see the
3329 N_LBRAC that starts the block. */
3331 static boolean
3333 PTR dhandle;
3335 {
3340 {
3349 }
3354 }
3356 /* Find the slot for a type in the database. */
3362 {
3371 {
3374 }
3376 {
3379 }
3384 {
3386 {
3389 }
3392 }
3394 {
3397 }
3400 }
3402 /* Find a type given a type number. If the type has not been
3403 allocated yet, create an indirect type. */
3405 static debug_type
3407 PTR dhandle;
3410 {
3414 {
3415 /* A negative type number indicates an XCOFF builtin type. */
3417 }
3427 }
3429 /* Record that a given type number refers to a given type. */
3431 static boolean
3433 PTR dhandle ATTRIBUTE_UNUSED;
3436 debug_type type;
3437 {
3444 /* gdb appears to ignore type redefinitions, so we do as well. */
3449 }
3451 /* Return an XCOFF builtin type. */
3453 static debug_type
3455 PTR dhandle;
3458 {
3459 debug_type rettype;
3463 {
3466 }
3471 {
3473 /* The size of this and all the other types are fixed, defined
3474 by the debugging format. */
3518 /* IEEE single precision (32 bit). */
3523 /* IEEE double precision (64 bit). */
3528 /* This is an IEEE double on the RS/6000, and different machines
3529 with different sizes for "long double" should use different
3530 negative type numbers. See stabs.texinfo. */
3551 /* FIXME */
3556 /* FIXME */
3577 /* Complex type consisting of two IEEE single precision values. */
3582 /* Complex type consisting of two IEEE double precision values. */
3599 /* FIXME */
3621 }
3628 }
3630 /* Find or create a tagged type. */
3632 static debug_type
3634 PTR dhandle;
3639 {
3641 debug_type dtype;
3646 /* We pass DEBUG_KIND_ILLEGAL because we want all tags in the same
3647 namespace. This is right for C, and I don't know how to handle
3648 other languages. FIXME. */
3651 {
3654 }
3656 /* We need to allocate an entry on the undefined tag list. */
3658 {
3661 {
3666 }
3667 }
3669 {
3679 }
3682 }
3683 \f
3684 /* In order to get the correct argument types for a stubbed method, we
3685 need to extract the argument types from a C++ mangled string.
3686 Since the argument types can refer back to the return type, this
3687 means that we must demangle the entire physical name. In gdb this
3688 is done by calling cplus_demangle and running the results back
3689 through the C++ expression parser. Since we have no expression
3690 parser, we must duplicate much of the work of cplus_demangle here.
3692 We assume that GNU style demangling is used, since this is only
3693 done for method stubs, and only g++ should output that form of
3694 debugging information. */
3696 /* This structure is used to hold a pointer to type information which
3697 demangling a string. */
3699 struct stab_demangle_typestring
3700 {
3701 /* The start of the type. This is not null terminated. */
3703 /* The length of the type. */
3705 };
3707 /* This structure is used to hold information while demangling a
3708 string. */
3710 struct stab_demangle_info
3711 {
3712 /* The debugging information handle. */
3713 PTR dhandle;
3714 /* The stab information handle. */
3716 /* The array of arguments we are building. */
3718 /* Whether the method takes a variable number of arguments. */
3719 boolean varargs;
3720 /* The array of types we have remembered. */
3722 /* The number of typestrings. */
3724 /* The number of typestring slots we have allocated. */
3726 };
3730 static boolean stab_demangle_get_count
3732 static boolean stab_demangle_prefix
3734 static boolean stab_demangle_function_name
3736 static boolean stab_demangle_signature
3738 static boolean stab_demangle_qualified
3740 static boolean stab_demangle_template
3742 static boolean stab_demangle_class
3744 static boolean stab_demangle_args
3746 boolean *));
3747 static boolean stab_demangle_arg
3750 static boolean stab_demangle_type
3752 static boolean stab_demangle_fund_type
3754 static boolean stab_demangle_remember_type
3757 /* Warn about a bad demangling. */
3759 static void
3762 {
3764 }
3766 /* Get a count from a stab string. */
3768 static unsigned int
3771 {
3776 {
3780 }
3782 }
3784 /* Require a count in a string. The count may be multiple digits, in
3785 which case it must end in an underscore. */
3787 static boolean
3791 {
3798 {
3804 do
3805 {
3809 }
3812 {
3815 }
3816 }
3819 }
3821 /* This function demangles a physical name, returning a NULL
3822 terminated array of argument types. */
3826 PTR dhandle;
3830 {
3843 /* cplus_demangle checks for special GNU mangled forms, but we can't
3844 see any of them in mangled method argument types. */
3850 {
3853 }
3864 error_return:
3868 }
3870 /* Demangle the prefix of the mangled name. */
3872 static boolean
3876 {
3880 /* cplus_demangle checks for global constructors and destructors,
3881 but we can't see them in mangled argument types. */
3883 /* Look for `__'. */
3885 do
3886 {
3888 }
3892 {
3895 }
3899 /* We found `__'; move ahead to the last contiguous `__' pair. */
3908 {
3909 /* This is a GNU style constructor name. */
3912 }
3916 {
3917 /* Look for the `__' that separates the prefix from the
3918 signature. */
3923 {
3926 }
3929 }
3931 {
3932 /* The name doesn't start with `__', but it does contain `__'. */
3934 }
3935 else
3936 {
3939 }
3940 /*NOTREACHED*/
3941 }
3943 /* Demangle a function name prefix. The scan argument points to the
3944 double underscore which separates the function name from the
3945 signature. */
3947 static boolean
3952 {
3955 /* The string from *pp to scan is the name of the function. We
3956 don't care about the name, since we just looking for argument
3957 types. However, for conversion operators, the name may include a
3958 type which we must remember in order to handle backreferences. */
3966 {
3969 /* This is a type conversion operator. */
3973 }
3978 {
3981 /* This is a type conversion operator. */
3985 }
3988 }
3990 /* Demangle the signature. This is where the argument types are
3991 found. */
3993 static boolean
3997 {
4009 {
4011 {
4022 /* Static member function. FIXME: Can this happen? */
4029 /* Const member function. */
4047 /* Function. I don't know if this actually happens with g++
4048 output. */
4057 /* Template. */
4068 /* At the outermost level, we cannot have a return type
4069 specified, so if we run into another '_' at this point we
4070 are dealing with a mangled name that is either bogus, or
4071 has been mangled by some algorithm we don't know how to
4072 deal with. So just reject the entire demangling. */
4077 /* Assume we have stumbled onto the first outermost function
4078 argument token, and start processing args. */
4083 }
4086 {
4090 }
4091 }
4094 {
4095 /* With GNU style demangling, bar__3foo is 'foo::bar(void)', and
4096 bar__3fooi is 'foo::bar(int)'. We get here when we find the
4097 first case, and need to ensure that the '(void)' gets added
4098 to the current declp. */
4101 }
4104 }
4106 /* Demangle a qualified name, such as "Q25Outer5Inner" which is the
4107 mangled form of "Outer::Inner". */
4109 static boolean
4114 {
4118 debug_type context;
4123 {
4125 /* GNU mangled name with more than 9 classes. The count is
4126 preceded by an underscore (to distinguish it from the <= 9
4127 case) and followed by an underscore. */
4130 {
4133 }
4138 {
4141 }
4148 /* Skip an optional underscore after the count. */
4158 }
4162 /* Pick off the names. */
4164 {
4168 {
4176 {
4179 DEBUG_KIND_CLASS);
4183 }
4184 }
4185 else
4186 {
4191 {
4194 }
4197 {
4207 {
4210 /* Try to find the type by looking through the
4211 fields of context until we find a field with the
4212 same type. This ought to work for a class
4213 defined within a class, but it won't work for,
4214 e.g., an enum defined within a class. stabs does
4215 not give us enough information to figure out the
4216 latter case. */
4221 {
4222 debug_type ft;
4230 {
4233 }
4234 }
4237 }
4240 {
4241 /* We have to fall back on finding the type by name.
4242 If there are more types to come, then this must
4243 be a class. Otherwise, it could be anything. */
4246 {
4251 name);
4253 }
4256 {
4261 ? DEBUG_KIND_ILLEGAL
4265 }
4266 }
4267 }
4270 }
4271 }
4277 }
4279 /* Demangle a template. If PNAME is not NULL, this sets *PNAME to a
4280 string representation of the template. */
4282 static boolean
4287 {
4295 /* Skip the template name. */
4298 {
4301 }
4304 /* Get the size of the parameter list. */
4306 {
4309 }
4312 {
4314 {
4315 /* This is a type parameter. */
4319 }
4320 else
4321 {
4324 boolean done;
4334 /* This is a value parameter. */
4340 {
4342 {
4389 /* Assume it's a user defined integral type. */
4393 }
4394 }
4397 {
4402 }
4404 {
4411 {
4414 }
4415 }
4417 {
4422 {
4425 }
4426 }
4428 {
4434 {
4438 }
4440 {
4444 }
4445 }
4447 {
4451 {
4454 }
4456 }
4457 }
4458 }
4460 /* We can translate this to a string fairly easily by invoking the
4461 regular demangling routine. */
4463 {
4480 {
4485 }
4487 /* Eliminating all spaces, except those between > characters,
4488 makes it more likely that the demangled name will match the
4489 name which g++ used as the structure name. */
4498 }
4501 }
4503 /* Demangle a class name. */
4505 static boolean
4510 {
4518 {
4521 }
4529 }
4531 /* Demangle function arguments. If the pargs argument is not NULL, it
4532 is set to a NULL terminated array holding the arguments. */
4534 static boolean
4540 {
4548 {
4551 }
4555 {
4557 {
4566 else
4567 {
4569 {
4572 }
4573 }
4576 {
4579 }
4582 {
4585 }
4587 {
4593 }
4594 }
4595 else
4596 {
4599 }
4600 }
4606 {
4610 }
4613 }
4615 /* Demangle a single argument. */
4617 static boolean
4624 {
4626 debug_type type;
4635 {
4640 {
4644 }
4647 }
4650 }
4652 /* Demangle a type. If the ptype argument is not NULL, *ptype is set
4653 to the newly allocated type. */
4655 static boolean
4660 {
4666 {
4669 /* A pointer type. */
4678 /* A reference type. */
4687 /* An array. */
4688 {
4694 {
4696 {
4699 }
4703 }
4705 {
4708 }
4714 {
4715 debug_type int_type;
4722 }
4723 }
4727 /* A back reference to a remembered type. */
4728 {
4734 {
4737 }
4739 {
4742 }
4746 }
4750 /* A function. */
4751 {
4753 boolean varargs;
4765 {
4766 /* cplus_demangle will accept a function without a return
4767 type, but I don't know when that will happen, or what
4768 to do if it does. */
4771 }
4777 varargs);
4779 }
4784 {
4788 boolean varargs;
4800 {
4803 {
4806 }
4811 {
4815 DEBUG_KIND_CLASS);
4818 }
4819 }
4821 {
4827 }
4828 else
4829 {
4832 }
4835 {
4837 {
4840 }
4842 {
4845 }
4847 {
4850 }
4860 }
4863 {
4866 }
4873 {
4877 else
4878 {
4879 /* FIXME: We have no way to record constp or
4880 volatilep. */
4883 }
4884 }
4885 }
4903 {
4909 }
4916 }
4919 }
4921 /* Demangle a fundamental type. If the ptype argument is not NULL,
4922 *ptype is set to the newly allocated type. */
4924 static boolean
4929 {
4932 boolean done;
4943 {
4945 {
4969 }
4970 }
4973 {
4976 /* cplus_demangle permits this, but I don't know what it means. */
4982 {
4986 }
4992 {
4994 (unsignedp
4999 }
5005 {
5007 (unsignedp
5012 }
5018 {
5020 (unsignedp
5025 }
5031 {
5033 (unsignedp
5038 }
5044 {
5048 }
5054 {
5056 (unsignedp
5058 : (signedp
5063 }
5069 {
5073 }
5079 {
5083 }
5089 {
5093 }
5099 {
5103 }
5110 {
5113 }
5114 /* Fall through. */
5117 {
5123 {
5130 {
5131 /* FIXME: It is probably incorrect to assume that
5132 undefined types are tagged types. */
5135 DEBUG_KIND_ILLEGAL);
5138 }
5139 }
5140 }
5144 {
5151 {
5154 DEBUG_KIND_CLASS);
5158 }
5159 }
5165 }
5168 {
5173 }
5176 }
5178 /* Remember a type string in a demangled string. */
5180 static boolean
5185 {
5187 {
5193 }
5200 }