1/* Standard language operator definitions for GDB, the GNU debugger. 2 3 Copyright (C) 1986, 1989, 1992, 1994, 2000, 2003, 2005, 2007, 2008, 2009, 4 2010, 2011 Free Software Foundation, Inc. 5 6 This file is part of GDB. 7 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 3 of the License, or 11 (at your option) any later version. 12 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. 17 18 You should have received a copy of the GNU General Public License 19 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 20 21/* Used when it's necessary to pass an opcode which will be ignored, 22 or to catch uninitialized values. */ 23OP (OP_NULL) 24 25/* BINOP_... operate on two values computed by following subexpressions, 26replacing them by one result value. They take no immediate arguments. */ 27 28OP (BINOP_ADD) /* + */ 29OP (BINOP_SUB) /* - */ 30OP (BINOP_MUL) /* * */ 31OP (BINOP_DIV) /* / */ 32OP (BINOP_REM) /* % */ 33OP (BINOP_MOD) /* mod (Knuth 1.2.4) */ 34OP (BINOP_LSH) /* << */ 35OP (BINOP_RSH) /* >> */ 36OP (BINOP_LOGICAL_AND) /* && */ 37OP (BINOP_LOGICAL_OR) /* || */ 38OP (BINOP_BITWISE_AND) /* & */ 39OP (BINOP_BITWISE_IOR) /* | */ 40OP (BINOP_BITWISE_XOR) /* ^ */ 41OP (BINOP_EQUAL) /* == */ 42OP (BINOP_NOTEQUAL) /* != */ 43OP (BINOP_LESS) /* < */ 44OP (BINOP_GTR) /* > */ 45OP (BINOP_LEQ) /* <= */ 46OP (BINOP_GEQ) /* >= */ 47OP (BINOP_REPEAT) /* @ */ 48OP (BINOP_ASSIGN) /* = */ 49OP (BINOP_COMMA) /* , */ 50OP (BINOP_SUBSCRIPT) /* x[y] */ 51OP (BINOP_EXP) /* Exponentiation */ 52 53/* C++. */ 54 55OP (BINOP_MIN) /* <? */ 56OP (BINOP_MAX) /* >? */ 57 58/* STRUCTOP_MEMBER is used for pointer-to-member constructs. 59 X . * Y translates into X STRUCTOP_MEMBER Y. */ 60OP (STRUCTOP_MEMBER) 61 62/* STRUCTOP_MPTR is used for pointer-to-member constructs 63 when X is a pointer instead of an aggregate. */ 64OP (STRUCTOP_MPTR) 65 66/* TYPE_INSTANCE is used when the user specifies a specific 67 type instantiation for overloaded methods/functions. 68 69 The format is: 70 TYPE_INSTANCE num_types type0 ... typeN num_types TYPE_INSTANCE. */ 71OP (TYPE_INSTANCE) 72 73/* end of C++. */ 74 75/* For Modula-2 integer division DIV. */ 76OP (BINOP_INTDIV) 77 78/* +=, -=, *=, and so on. The following exp_element is another opcode, 79 a BINOP_, saying how to modify. Then comes another BINOP_ASSIGN_MODIFY, 80 making three exp_elements in total. */ 81OP (BINOP_ASSIGN_MODIFY) 82 83/* Modula-2 standard (binary) procedures. */ 84OP (BINOP_VAL) 85 86/* Concatenate two operands, such as character strings or bitstrings. 87 If the first operand is a integer expression, then it means concatenate 88 the second operand with itself that many times. */ 89OP (BINOP_CONCAT) 90 91/* For (the deleted) Chill and Pascal. */ 92OP (BINOP_IN) /* Returns 1 iff ARG1 IN ARG2. */ 93 94/* This is the "colon operator" used various places in (the 95 deleted) Chill. */ 96OP (BINOP_RANGE) 97 98/* This must be the highest BINOP_ value, for expprint.c. */ 99OP (BINOP_END) 100 101/* Operates on three values computed by following subexpressions. */ 102OP (TERNOP_COND) /* ?: */ 103 104/* A sub-string/sub-array. (the deleted) Chill syntax: 105 OP1(OP2:OP3). Return elements OP2 through OP3 of OP1. */ 106OP (TERNOP_SLICE) 107 108/* A sub-string/sub-array. (The deleted) Chill syntax: OP1(OP2 UP 109 OP3). Return OP3 elements of OP1, starting with element 110 OP2. */ 111OP (TERNOP_SLICE_COUNT) 112 113/* Multidimensional subscript operator, such as Modula-2 x[a,b,...]. 114 The dimensionality is encoded in the operator, like the number of 115 function arguments in OP_FUNCALL, I.E. <OP><dimension><OP>. 116 The value of the first following subexpression is subscripted 117 by each of the next following subexpressions, one per dimension. */ 118OP (MULTI_SUBSCRIPT) 119 120/* The OP_... series take immediate following arguments. 121 After the arguments come another OP_... (the same one) 122 so that the grouping can be recognized from the end. */ 123 124/* OP_LONG is followed by a type pointer in the next exp_element 125 and the long constant value in the following exp_element. 126 Then comes another OP_LONG. 127 Thus, the operation occupies four exp_elements. */ 128OP (OP_LONG) 129 130/* OP_DOUBLE is similar but takes a DOUBLEST constant instead of a 131 long. */ 132OP (OP_DOUBLE) 133 134/* OP_VAR_VALUE takes one struct block * in the following element, 135 and one struct symbol * in the following exp_element, followed 136 by another OP_VAR_VALUE, making four exp_elements. If the 137 block is non-NULL, evaluate the symbol relative to the 138 innermost frame executing in that block; if the block is NULL 139 use the selected frame. */ 140OP (OP_VAR_VALUE) 141 142/* OP_LAST is followed by an integer in the next exp_element. 143 The integer is zero for the last value printed, 144 or it is the absolute number of a history element. 145 With another OP_LAST at the end, this makes three exp_elements. */ 146OP (OP_LAST) 147 148/* OP_REGISTER is followed by a string in the next exp_element. 149 This is the name of a register to fetch. */ 150OP (OP_REGISTER) 151 152/* OP_INTERNALVAR is followed by an internalvar ptr in the next 153 exp_element. With another OP_INTERNALVAR at the end, this 154 makes three exp_elements. */ 155OP (OP_INTERNALVAR) 156 157/* OP_FUNCALL is followed by an integer in the next exp_element. 158 The integer is the number of args to the function call. 159 That many plus one values from following subexpressions 160 are used, the first one being the function. 161 The integer is followed by a repeat of OP_FUNCALL, 162 making three exp_elements. */ 163OP (OP_FUNCALL) 164 165/* OP_OBJC_MSGCALL is followed by a string in the next exp_element 166 and then an integer. The string is the selector string. The 167 integer is the number of arguments to the message call. That 168 many plus one values are used, the first one being the object 169 pointer. This is an Objective C message. */ 170OP (OP_OBJC_MSGCALL) 171 172/* This is EXACTLY like OP_FUNCALL but is semantically different. 173 In F77, array subscript expressions, substring expressions and 174 function calls are all exactly the same syntactically. They 175 may only be disambiguated at runtime. Thus this operator, 176 which indicates that we have found something of the form 177 <name> ( <stuff> ). */ 178OP (OP_F77_UNDETERMINED_ARGLIST) 179 180/* OP_COMPLEX takes a type in the following element, followed by another 181 OP_COMPLEX, making three exp_elements. It is followed by two double 182 args, and converts them into a complex number of the given type. */ 183OP (OP_COMPLEX) 184 185/* OP_STRING represents a string constant. 186 Its format is the same as that of a STRUCTOP, but the string 187 data is just made into a string constant when the operation 188 is executed. */ 189OP (OP_STRING) 190 191/* OP_BITSTRING represents a packed bitstring constant. 192 Its format is the same as that of a STRUCTOP, but the bitstring 193 data is just made into a bitstring constant when the operation 194 is executed. */ 195OP (OP_BITSTRING) 196 197/* OP_ARRAY creates an array constant out of the following subexpressions. 198 It is followed by two exp_elements, the first containing an integer 199 that is the lower bound of the array and the second containing another 200 integer that is the upper bound of the array. The second integer is 201 followed by a repeat of OP_ARRAY, making four exp_elements total. 202 The bounds are used to compute the number of following subexpressions 203 to consume, as well as setting the bounds in the created array constant. 204 The type of the elements is taken from the type of the first subexp, 205 and they must all match. */ 206OP (OP_ARRAY) 207 208/* UNOP_CAST is followed by a type pointer in the next exp_element. 209 With another UNOP_CAST at the end, this makes three exp_elements. 210 It casts the value of the following subexpression. */ 211OP (UNOP_CAST) 212 213/* The C++ dynamic_cast operator. */ 214OP (UNOP_DYNAMIC_CAST) 215 216/* The C++ reinterpret_cast operator. */ 217OP (UNOP_REINTERPRET_CAST) 218 219/* UNOP_MEMVAL is followed by a type pointer in the next exp_element 220 With another UNOP_MEMVAL at the end, this makes three exp_elements. 221 It casts the contents of the word addressed by the value of the 222 following subexpression. */ 223OP (UNOP_MEMVAL) 224 225/* UNOP_MEMVAL_TLS is followed by a `struct objfile' pointer in the next 226 exp_element and a type pointer in the following exp_element. 227 With another UNOP_MEMVAL_TLS at the end, this makes four exp_elements. 228 It casts the contents of the word offsetted by the value of the 229 following subexpression from the TLS specified by `struct objfile'. */ 230OP (UNOP_MEMVAL_TLS) 231 232/* UNOP_... operate on one value from a following subexpression 233 and replace it with a result. They take no immediate arguments. */ 234 235OP (UNOP_NEG) /* Unary - */ 236OP (UNOP_LOGICAL_NOT) /* Unary ! */ 237OP (UNOP_COMPLEMENT) /* Unary ~ */ 238OP (UNOP_IND) /* Unary * */ 239OP (UNOP_ADDR) /* Unary & */ 240OP (UNOP_PREINCREMENT) /* ++ before an expression */ 241OP (UNOP_POSTINCREMENT) /* ++ after an expression */ 242OP (UNOP_PREDECREMENT) /* -- before an expression */ 243OP (UNOP_POSTDECREMENT) /* -- after an expression */ 244OP (UNOP_SIZEOF) /* Unary sizeof (followed by expression) */ 245 246OP (UNOP_PLUS) /* Unary plus */ 247 248OP (UNOP_CAP) /* Modula-2 standard (unary) procedures */ 249OP (UNOP_CHR) 250OP (UNOP_ORD) 251OP (UNOP_ABS) 252OP (UNOP_FLOAT) 253OP (UNOP_HIGH) 254OP (UNOP_MAX) 255OP (UNOP_MIN) 256OP (UNOP_ODD) 257OP (UNOP_TRUNC) 258 259OP (OP_BOOL) /* Modula-2 builtin BOOLEAN type */ 260OP (OP_M2_STRING) /* Modula-2 string constants */ 261 262/* STRUCTOP_... operate on a value from a following subexpression 263 by extracting a structure component specified by a string 264 that appears in the following exp_elements (as many as needed). 265 STRUCTOP_STRUCT is used for "." and STRUCTOP_PTR for "->". 266 They differ only in the error message given in case the value is 267 not suitable or the structure component specified is not found. 268 269 The length of the string follows the opcode, followed by 270 BYTES_TO_EXP_ELEM(length) elements containing the data of the 271 string, followed by the length again and the opcode again. */ 272 273OP (STRUCTOP_STRUCT) 274OP (STRUCTOP_PTR) 275 276/* C++: OP_THIS is just a placeholder for the class instance variable. 277 It just comes in a tight (OP_THIS, OP_THIS) pair. */ 278OP (OP_THIS) 279 280/* Objective-C: OP_OBJC_SELF is just a placeholder for the class 281 instance variable. It just comes in a tight (OP_OBJC_SELF, 282 OP_OBJC_SELF) pair. */ 283OP (OP_OBJC_SELF) 284 285/* Objective C: "@selector" pseudo-operator. */ 286OP (OP_OBJC_SELECTOR) 287 288/* OP_SCOPE surrounds a type name and a field name. The type 289 name is encoded as one element, but the field name stays as 290 a string, which, of course, is variable length. */ 291OP (OP_SCOPE) 292 293/* Used to represent named structure field values in brace 294 initializers (or tuples as they are called in (the deleted) 295 Chill). 296 297 The gcc C syntax is NAME:VALUE or .NAME=VALUE, the (the 298 deleted) Chill syntax is .NAME:VALUE. Multiple labels (as in 299 the (the deleted) Chill syntax .NAME1,.NAME2:VALUE) is 300 represented as if it were .NAME1:(.NAME2:VALUE) (though that is 301 not valid (the deleted) Chill syntax). 302 303 The NAME is represented as for STRUCTOP_STRUCT; VALUE follows. */ 304OP (OP_LABELED) 305 306/* OP_TYPE is for parsing types, and used with the "ptype" command 307 so we can look up types that are qualified by scope, either with 308 the GDB "::" operator, or the Modula-2 '.' operator. */ 309OP (OP_TYPE) 310 311/* An un-looked-up identifier. */ 312OP (OP_NAME) 313 314/* An Objective C Foundation Class NSString constant. */ 315OP (OP_OBJC_NSSTRING) 316 317/* A F90 array range operator (for "exp:exp", "exp:", ":exp" and ":"). */ 318OP (OP_F90_RANGE) 319 320/* OP_DECFLOAT is followed by a type pointer in the next exp_element 321 and a dec long constant value in the following exp_element. 322 Then comes another OP_DECFLOAT. */ 323OP (OP_DECFLOAT) 324 325/* OP_ADL_FUNC specifies that the function is to be looked up in an 326 Argument Dependent manner (Koenig lookup). */ 327OP (OP_ADL_FUNC) 328