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Diffstat (limited to 'include/hp-symtab.h')
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diff --git a/include/hp-symtab.h b/include/hp-symtab.h new file mode 100644 index 000000000..6267d5572 --- /dev/null +++ b/include/hp-symtab.h @@ -0,0 +1,1866 @@ +/* Definitions and structures for reading debug symbols from the + native HP C compiler. + + Written by the Center for Software Science at the University of Utah + and by Cygnus Support. + + Copyright 1994, 1995, 1998, 1999, 2003 Free Software Foundation, Inc. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +#ifndef HP_SYMTAB_INCLUDED +#define HP_SYMTAB_INCLUDED + +/* General information: + + This header file defines and describes only the data structures + necessary to read debug symbols produced by the HP C compiler, + HP ANSI C++ compiler, and HP FORTRAN 90 compiler using the + SOM object file format. + (For a full description of the debug format, ftp hpux-symtab.h from + jaguar.cs.utah.edu:/dist). + + Additional notes (Rich Title) + This file is a reverse-engineered version of a file called + "symtab.h" which exists internal to HP's Computer Languages Organization + in /CLO/Components/DDE/obj/som/symtab.h. Because HP's version of + the file is copyrighted and not distributed, it is necessary for + GDB to use the reverse-engineered version that follows. + Work was done by Cygnus to reverse-engineer the C subset of symtab.h. + The WDB project has extended this to also contain the C++ + symbol definitions, the F90 symbol definitions, + and the DOC (debugging-optimized-code) symbol definitions. + In some cases (the C++ symbol definitions) + I have added internal documentation here that + goes beyond what is supplied in HP's symtab.h. If we someday + unify these files again, the extra comments should be merged back + into HP's symtab.h. + + ------------------------------------------------------------------- + + Debug symbols are contained entirely within an unloadable space called + $DEBUG$. $DEBUG$ contains several subspaces which group related + debug symbols. + + $GNTT$ contains information for global variables, types and contants. + + $LNTT$ contains information for procedures (including nesting), scoping + information, local variables, types, and constants. + + $SLT$ contains source line information so that code addresses may be + mapped to source lines. + + $VT$ contains various strings and constants for named objects (variables, + typedefs, functions, etc). Strings are stored as null-terminated character + lists. Constants always begin on word boundaries. The first byte of + the VT must be zero (a null string). + + $XT$ is not currently used by GDB. + + Many structures within the subspaces point to other structures within + the same subspace, or to structures within a different subspace. These + pointers are represented as a structure index from the beginning of + the appropriate subspace. */ + +/* Used to describe where a constant is stored. */ +enum location_type +{ + LOCATION_IMMEDIATE, + LOCATION_PTR, + LOCATION_VT, +}; + +/* Languages supported by this debug format. Within the data structures + this type is limited to 4 bits for a maximum of 16 languages. */ +enum hp_language +{ + HP_LANGUAGE_UNKNOWN, + HP_LANGUAGE_C, + HP_LANGUAGE_FORTRAN, + HP_LANGUAGE_F77 = HP_LANGUAGE_FORTRAN, + HP_LANGUAGE_PASCAL, + HP_LANGUAGE_MODCAL, + HP_LANGUAGE_COBOL, + HP_LANGUAGE_BASIC, + HP_LANGUAGE_ADA, + HP_LANGUAGE_CPLUSPLUS, + HP_LANGUAGE_DMPASCAL +}; + + +/* Basic data types available in this debug format. Within the data + structures this type is limited to 5 bits for a maximum of 32 basic + data types. */ +enum hp_type +{ + HP_TYPE_UNDEFINED, /* 0 */ + HP_TYPE_BOOLEAN, /* 1 */ + HP_TYPE_CHAR, /* 2 */ + HP_TYPE_INT, /* 3 */ + HP_TYPE_UNSIGNED_INT, /* 4 */ + HP_TYPE_REAL, /* 5 */ + HP_TYPE_COMPLEX, /* 6 */ + HP_TYPE_STRING200, /* 7 */ + HP_TYPE_LONGSTRING200, /* 8 */ + HP_TYPE_TEXT, /* 9 */ + HP_TYPE_FLABEL, /* 10 */ + HP_TYPE_FTN_STRING_SPEC, /* 11 */ + HP_TYPE_MOD_STRING_SPEC, /* 12 */ + HP_TYPE_PACKED_DECIMAL, /* 13 */ + HP_TYPE_REAL_3000, /* 14 */ + HP_TYPE_MOD_STRING_3000, /* 15 */ + HP_TYPE_ANYPOINTER, /* 16 */ + HP_TYPE_GLOBAL_ANYPOINTER, /* 17 */ + HP_TYPE_LOCAL_ANYPOINTER, /* 18 */ + HP_TYPE_COMPLEXS3000, /* 19 */ + HP_TYPE_FTN_STRING_S300_COMPAT, /* 20 */ + HP_TYPE_FTN_STRING_VAX_COMPAT, /* 21 */ + HP_TYPE_BOOLEAN_S300_COMPAT, /* 22 */ + HP_TYPE_BOOLEAN_VAX_COMPAT, /* 23 */ + HP_TYPE_WIDE_CHAR, /* 24 */ + HP_TYPE_LONG, /* 25 */ + HP_TYPE_UNSIGNED_LONG, /* 26 */ + HP_TYPE_DOUBLE, /* 27 */ + HP_TYPE_TEMPLATE_ARG, /* 28 */ + HP_TYPE_VOID /* 29 */ +}; + +/* An immediate name and type table entry. + + extension and immediate will always be one. + global will always be zero. + hp_type is the basic type this entry describes. + bitlength is the length in bits for the basic type. */ +struct dnttp_immediate +{ + unsigned int extension: 1; + unsigned int immediate: 1; + unsigned int global: 1; + unsigned int type: 5; + unsigned int bitlength: 24; +}; + +/* A nonimmediate name and type table entry. + + extension will always be one. + immediate will always be zero. + if global is zero, this entry points into the LNTT + if global is one, this entry points into the GNTT + index is the index within the GNTT or LNTT for this entry. */ +struct dnttp_nonimmediate +{ + unsigned int extension: 1; + unsigned int immediate: 1; + unsigned int global: 1; + unsigned int index: 29; +}; + +/* A pointer to an entry in the GNTT and LNTT tables. It has two + forms depending on the type being described. + + The immediate form is used for simple entries and is one + word. + + The nonimmediate form is used for complex entries and contains + an index into the LNTT or GNTT which describes the entire type. + + If a dnttpointer is -1, then it is a NIL entry. */ + +#define DNTTNIL (-1) +typedef union dnttpointer +{ + struct dnttp_immediate dntti; + struct dnttp_nonimmediate dnttp; + int word; +} dnttpointer; + +/* An index into the source line table. As with dnttpointers, a sltpointer + of -1 indicates a NIL entry. */ +#define SLTNIL (-1) +typedef int sltpointer; + +/* Index into DOC (= "Debugging Optimized Code") line table. */ +#define LTNIL (-1) +typedef int ltpointer; + +/* Index into context table. */ +#define CTXTNIL (-1) +typedef int ctxtpointer; + +/* Unsigned byte offset into the VT. */ +typedef unsigned int vtpointer; + +/* A DNTT entry (used within the GNTT and LNTT). + + DNTT entries are variable sized objects, but are always a multiple + of 3 words (we call each group of 3 words a "block"). + + The first bit in each block is an extension bit. This bit is zero + for the first block of a DNTT entry. If the entry requires more + than one block, then this bit is set to one in all blocks after + the first one. */ + +/* Each DNTT entry describes a particular debug symbol (beginning of + a source file, a function, variables, structures, etc. + + The type of the DNTT entry is stored in the "kind" field within the + DNTT entry itself. */ + +enum dntt_entry_type +{ + DNTT_TYPE_NIL = -1, + DNTT_TYPE_SRCFILE, + DNTT_TYPE_MODULE, + DNTT_TYPE_FUNCTION, + DNTT_TYPE_ENTRY, + DNTT_TYPE_BEGIN, + DNTT_TYPE_END, + DNTT_TYPE_IMPORT, + DNTT_TYPE_LABEL, + DNTT_TYPE_FPARAM, + DNTT_TYPE_SVAR, + DNTT_TYPE_DVAR, + DNTT_TYPE_HOLE1, + DNTT_TYPE_CONST, + DNTT_TYPE_TYPEDEF, + DNTT_TYPE_TAGDEF, + DNTT_TYPE_POINTER, + DNTT_TYPE_ENUM, + DNTT_TYPE_MEMENUM, + DNTT_TYPE_SET, + DNTT_TYPE_SUBRANGE, + DNTT_TYPE_ARRAY, + DNTT_TYPE_STRUCT, + DNTT_TYPE_UNION, + DNTT_TYPE_FIELD, + DNTT_TYPE_VARIANT, + DNTT_TYPE_FILE, + DNTT_TYPE_FUNCTYPE, + DNTT_TYPE_WITH, + DNTT_TYPE_COMMON, + DNTT_TYPE_COBSTRUCT, + DNTT_TYPE_XREF, + DNTT_TYPE_SA, + DNTT_TYPE_MACRO, + DNTT_TYPE_BLOCKDATA, + DNTT_TYPE_CLASS_SCOPE, + DNTT_TYPE_REFERENCE, + DNTT_TYPE_PTRMEM, + DNTT_TYPE_PTRMEMFUNC, + DNTT_TYPE_CLASS, + DNTT_TYPE_GENFIELD, + DNTT_TYPE_VFUNC, + DNTT_TYPE_MEMACCESS, + DNTT_TYPE_INHERITANCE, + DNTT_TYPE_FRIEND_CLASS, + DNTT_TYPE_FRIEND_FUNC, + DNTT_TYPE_MODIFIER, + DNTT_TYPE_OBJECT_ID, + DNTT_TYPE_MEMFUNC, + DNTT_TYPE_TEMPLATE, + DNTT_TYPE_TEMPLATE_ARG, + DNTT_TYPE_FUNC_TEMPLATE, + DNTT_TYPE_LINK, + DNTT_TYPE_DYN_ARRAY_DESC, + DNTT_TYPE_DESC_SUBRANGE, + DNTT_TYPE_BEGIN_EXT, + DNTT_TYPE_INLN, + DNTT_TYPE_INLN_LIST, + DNTT_TYPE_ALIAS, + DNTT_TYPE_DOC_FUNCTION, + DNTT_TYPE_DOC_MEMFUNC, + DNTT_TYPE_MAX +}; + +/* DNTT_TYPE_SRCFILE: + + One DNTT_TYPE_SRCFILE symbol is output for the start of each source + file and at the begin and end of an included file. A DNTT_TYPE_SRCFILE + entry is also output before each DNTT_TYPE_FUNC symbol so that debuggers + can determine what file a function was defined in. + + LANGUAGE describes the source file's language. + + NAME points to an VT entry providing the source file's name. + + Note the name used for DNTT_TYPE_SRCFILE entries are exactly as seen + by the compiler (ie they may be relative or absolute). C include files + via <> inclusion must use absolute paths. + + ADDRESS points to an SLT entry from which line number and code locations + may be determined. */ + +struct dntt_type_srcfile +{ + unsigned int extension: 1; + unsigned int kind: 10; /* DNTT_TYPE_SRCFILE */ + unsigned int language: 4; + unsigned int unused: 17; + vtpointer name; + sltpointer address; +}; + +/* DNTT_TYPE_MODULE: + + A DNTT_TYPE_MODULE symbol is emitted for the start of a pascal + module or C source file. A module indicates a compilation unit + for name-scoping purposes; in that regard there should be + a 1-1 correspondence between GDB "symtab"'s and MODULE symbol records. + + Each DNTT_TYPE_MODULE must have an associated DNTT_TYPE_END symbol. + + NAME points to a VT entry providing the module's name. Note C + source files are considered nameless modules. + + ALIAS point to a VT entry providing a secondary name. + + ADDRESS points to an SLT entry from which line number and code locations + may be determined. */ + +struct dntt_type_module +{ + unsigned int extension: 1; + unsigned int kind: 10; /* DNTT_TYPE_MODULE */ + unsigned int unused: 21; + vtpointer name; + vtpointer alias; + dnttpointer unused2; + sltpointer address; +}; + +/* DNTT_TYPE_FUNCTION, + DNTT_TYPE_ENTRY, + DNTT_TYPE_BLOCKDATA, + DNTT_TYPE_MEMFUNC: + + A DNTT_TYPE_FUNCTION symbol is emitted for each function definition; + a DNTT_TYPE_ENTRY symbols is used for secondary entry points. Both + symbols used the dntt_type_function structure. + A DNTT_TYPE_BLOCKDATA symbol is emitted ...? + A DNTT_TYPE_MEMFUNC symbol is emitted for inlined member functions (C++). + + Each of DNTT_TYPE_FUNCTION must have a matching DNTT_TYPE_END. + + GLOBAL is nonzero if the function has global scope. + + LANGUAGE describes the function's source language. + + OPT_LEVEL describes the optimization level the function was compiled + with. + + VARARGS is nonzero if the function uses varargs. + + NAME points to a VT entry providing the function's name. + + ALIAS points to a VT entry providing a secondary name for the function. + + FIRSTPARAM points to a LNTT entry which describes the parameter list. + + ADDRESS points to an SLT entry from which line number and code locations + may be determined. + + ENTRYADDR is the memory address corresponding the function's entry point + + RETVAL points to a LNTT entry describing the function's return value. + + LOWADDR is the lowest memory address associated with this function. + + HIADDR is the highest memory address associated with this function. */ + +struct dntt_type_function +{ + unsigned int extension: 1; + unsigned int kind: 10; /* DNTT_TYPE_FUNCTION, + DNTT_TYPE_ENTRY, + DNTT_TYPE_BLOCKDATA + or DNTT_TYPE_MEMFUNC */ + unsigned int global: 1; + unsigned int language: 4; + unsigned int nest_level: 5; + unsigned int opt_level: 2; + unsigned int varargs: 1; + unsigned int lang_info: 4; + unsigned int inlined: 1; + unsigned int localalloc: 1; + unsigned int expansion: 1; + unsigned int unused: 1; + vtpointer name; + vtpointer alias; + dnttpointer firstparam; + sltpointer address; + CORE_ADDR entryaddr; + dnttpointer retval; + CORE_ADDR lowaddr; + CORE_ADDR hiaddr; +}; + +/* DNTT_TYPE_BEGIN: + + A DNTT_TYPE_BEGIN symbol is emitted to begin a new nested scope. + Every DNTT_TYPE_BEGIN symbol must have a matching DNTT_TYPE_END symbol. + + CLASSFLAG is nonzero if this is the beginning of a c++ class definition. + + ADDRESS points to an SLT entry from which line number and code locations + may be determined. */ + +struct dntt_type_begin +{ + unsigned int extension: 1; + unsigned int kind: 10; + unsigned int classflag: 1; + unsigned int unused: 20; + sltpointer address; +}; + +/* DNTT_TYPE_END: + + A DNTT_TYPE_END symbol is emitted when closing a scope started by + a DNTT_TYPE_MODULE, DNTT_TYPE_FUNCTION, DNTT_TYPE_WITH, + DNTT_TYPE_COMMON, DNTT_TYPE_BEGIN, and DNTT_TYPE_CLASS_SCOPE symbols. + + ENDKIND describes what type of scope the DNTT_TYPE_END is closing + (one of the above 6 kinds). + + CLASSFLAG is nonzero if this is the end of a c++ class definition. + + ADDRESS points to an SLT entry from which line number and code locations + may be determined. + + BEGINSCOPE points to the LNTT entry which opened the scope. */ + +struct dntt_type_end +{ + unsigned int extension: 1; + unsigned int kind: 10; + unsigned int endkind: 10; + unsigned int classflag: 1; + unsigned int unused: 10; + sltpointer address; + dnttpointer beginscope; +}; + +/* DNTT_TYPE_IMPORT is unused by GDB. */ +/* DNTT_TYPE_LABEL is unused by GDB. */ + +/* DNTT_TYPE_FPARAM: + + A DNTT_TYPE_FPARAM symbol is emitted for a function argument. When + chained together the symbols represent an argument list for a function. + + REGPARAM is nonzero if this parameter was passed in a register. + + INDIRECT is nonzero if this parameter is a pointer to the parameter + (pass by reference or pass by value for large items). + + LONGADDR is nonzero if the parameter is a 64bit pointer. + + NAME is a pointer into the VT for the parameter's name. + + LOCATION describes where the parameter is stored. Depending on the + parameter type LOCATION could be a register number, or an offset + from the stack pointer. + + TYPE points to a NTT entry describing the type of this parameter. + + NEXTPARAM points to the LNTT entry describing the next parameter. */ + +struct dntt_type_fparam +{ + unsigned int extension: 1; + unsigned int kind: 10; + unsigned int regparam: 1; + unsigned int indirect: 1; + unsigned int longaddr: 1; + unsigned int copyparam: 1; + unsigned int dflt: 1; + unsigned int doc_ranges: 1; + unsigned int misc_kind: 1; + unsigned int unused: 14; + vtpointer name; + CORE_ADDR location; + dnttpointer type; + dnttpointer nextparam; + int misc; +}; + +/* DNTT_TYPE_SVAR: + + A DNTT_TYPE_SVAR is emitted to describe a variable in static storage. + + GLOBAL is nonzero if the variable has global scope. + + INDIRECT is nonzero if the variable is a pointer to an object. + + LONGADDR is nonzero if the variable is in long pointer space. + + STATICMEM is nonzero if the variable is a member of a class. + + A_UNION is nonzero if the variable is an anonymous union member. + + NAME is a pointer into the VT for the variable's name. + + LOCATION provides the memory address for the variable. + + TYPE is a pointer into either the GNTT or LNTT which describes + the type of this variable. */ + +struct dntt_type_svar +{ + unsigned int extension: 1; + unsigned int kind: 10; + unsigned int global: 1; + unsigned int indirect: 1; + unsigned int longaddr: 1; + unsigned int staticmem: 1; + unsigned int a_union: 1; + unsigned int unused1: 1; + unsigned int thread_specific: 1; + unsigned int unused2: 14; + vtpointer name; + CORE_ADDR location; + dnttpointer type; + unsigned int offset; + unsigned int displacement; +}; + +/* DNTT_TYPE_DVAR: + + A DNTT_TYPE_DVAR is emitted to describe automatic variables and variables + held in registers. + + GLOBAL is nonzero if the variable has global scope. + + INDIRECT is nonzero if the variable is a pointer to an object. + + REGVAR is nonzero if the variable is in a register. + + A_UNION is nonzero if the variable is an anonymous union member. + + NAME is a pointer into the VT for the variable's name. + + LOCATION provides the memory address or register number for the variable. + + TYPE is a pointer into either the GNTT or LNTT which describes + the type of this variable. */ + +struct dntt_type_dvar +{ + unsigned int extension: 1; + unsigned int kind: 10; + unsigned int global: 1; + unsigned int indirect: 1; + unsigned int regvar: 1; + unsigned int a_union: 1; + unsigned int unused: 17; + vtpointer name; + int location; + dnttpointer type; + unsigned int offset; +}; + +/* DNTT_TYPE_CONST: + + A DNTT_TYPE_CONST symbol is emitted for program constants. + + GLOBAL is nonzero if the constant has global scope. + + INDIRECT is nonzero if the constant is a pointer to an object. + + LOCATION_TYPE describes where to find the constant's value + (in the VT, memory, or embedded in an instruction). + + CLASSMEM is nonzero if the constant is a member of a class. + + NAME is a pointer into the VT for the constant's name. + + LOCATION provides the memory address, register number or pointer + into the VT for the constant's value. + + TYPE is a pointer into either the GNTT or LNTT which describes + the type of this variable. */ + +struct dntt_type_const +{ + unsigned int extension: 1; + unsigned int kind: 10; + unsigned int global: 1; + unsigned int indirect: 1; + unsigned int location_type: 3; + unsigned int classmem: 1; + unsigned int unused: 15; + vtpointer name; + CORE_ADDR location; + dnttpointer type; + unsigned int offset; + unsigned int displacement; +}; + +/* DNTT_TYPE_TYPEDEF and DNTT_TYPE_TAGDEF: + + The same structure is used to describe typedefs and tagdefs. + + DNTT_TYPE_TYPEDEFS are associated with C "typedefs". + + DNTT_TYPE_TAGDEFs are associated with C "struct", "union", and "enum" + tags, which may have the same name as a typedef in the same scope. + Also they are associated with C++ "class" tags, which implicitly have + the same name as the class type. + + GLOBAL is nonzero if the typedef/tagdef has global scope. + + TYPEINFO is used to determine if full type information is available + for a tag. (usually 1, but can be zero for opaque types in C). + + NAME is a pointer into the VT for the constant's name. + + TYPE points to the underlying type for the typedef/tagdef in the + GNTT or LNTT. */ + +struct dntt_type_type +{ + unsigned int extension: 1; + unsigned int kind: 10; /* DNTT_TYPE_TYPEDEF or + DNTT_TYPE_TAGDEF. */ + unsigned int global: 1; + unsigned int typeinfo: 1; + unsigned int unused: 19; + vtpointer name; + dnttpointer type; /* Underlying type, which for TAGDEF's may be + DNTT_TYPE_STRUCT, DNTT_TYPE_UNION, + DNTT_TYPE_ENUM, or DNTT_TYPE_CLASS. + For TYPEDEF's other underlying types + are also possible. */ +}; + +/* DNTT_TYPE_POINTER: + + Used to describe a pointer to an underlying type. + + POINTSTO is a pointer into the GNTT or LNTT for the type which this + pointer points to. + + BITLENGTH is the length of the pointer (not the underlying type). */ + +struct dntt_type_pointer +{ + unsigned int extension: 1; + unsigned int kind: 10; + unsigned int unused: 21; + dnttpointer pointsto; + unsigned int bitlength; +}; + + +/* DNTT_TYPE_ENUM: + + Used to describe enumerated types. + + FIRSTMEM is a pointer to a DNTT_TYPE_MEMENUM in the GNTT/LNTT which + describes the first member (and contains a pointer to the chain of + members). + + BITLENGTH is the number of bits used to hold the values of the enum's + members. */ + +struct dntt_type_enum +{ + unsigned int extension: 1; + unsigned int kind: 10; + unsigned int unused: 21; + dnttpointer firstmem; + unsigned int bitlength; +}; + +/* DNTT_TYPE_MEMENUM + + Used to describe members of an enumerated type. + + CLASSMEM is nonzero if this member is part of a class. + + NAME points into the VT for the name of this member. + + VALUE is the value of this enumeration member. + + NEXTMEM points to the next DNTT_TYPE_MEMENUM in the chain. */ + +struct dntt_type_memenum +{ + unsigned int extension: 1; + unsigned int kind: 10; + unsigned int classmem: 1; + unsigned int unused: 20; + vtpointer name; + unsigned int value; + dnttpointer nextmem; +}; + +/* DNTT_TYPE_SET + + Used to describe PASCAL "set" type. + + DECLARATION describes the bitpacking of the set. + + SUBTYPE points to a DNTT entry describing the type of the members. + + BITLENGTH is the size of the set. */ + +struct dntt_type_set +{ + unsigned int extension: 1; + unsigned int kind: 10; + unsigned int declaration: 2; + unsigned int unused: 19; + dnttpointer subtype; + unsigned int bitlength; +}; + +/* DNTT_TYPE_SUBRANGE + + Used to describe subrange type. + + DYN_LOW describes the lower bound of the subrange: + + 00 for a constant lower bound (found in LOWBOUND). + + 01 for a dynamic lower bound with the lower bound found in the + memory address pointed to by LOWBOUND. + + 10 for a dynamic lower bound described by an variable found in the + DNTT/LNTT (LOWBOUND would be a pointer into the DNTT/LNTT). + + DYN_HIGH is similar to DYN_LOW, except it describes the upper bound. + + SUBTYPE points to the type of the subrange. + + BITLENGTH is the length in bits needed to describe the subrange's + values. */ + +struct dntt_type_subrange +{ + unsigned int extension: 1; + unsigned int kind: 10; + unsigned int dyn_low: 2; + unsigned int dyn_high: 2; + unsigned int unused: 17; + int lowbound; + int highbound; + dnttpointer subtype; + unsigned int bitlength; +}; + +/* DNTT_TYPE_ARRAY + + Used to describe an array type. + + DECLARATION describes the bit packing used in the array. + + ARRAYISBYTES is nonzero if the field in arraylength describes the + length in bytes rather than in bits. A value of zero is used to + describe an array with size 2**32. + + ELEMISBYTES is nonzero if the length if each element in the array + is describes in bytes rather than bits. A value of zero is used + to an element with size 2**32. + + ELEMORDER is nonzero if the elements are indexed in increasing order. + + JUSTIFIED if the elements are left justified to index zero. + + ARRAYLENGTH is the length of the array. + + INDEXTYPE is a DNTT pointer to the type used to index the array. + + ELEMTYPE is a DNTT pointer to the type for the array elements. + + ELEMLENGTH is the length of each element in the array (including + any padding). + + Multi-dimensional arrays are represented by ELEMTYPE pointing to + another DNTT_TYPE_ARRAY. */ + +struct dntt_type_array +{ + unsigned int extension: 1; + unsigned int kind: 10; + unsigned int declaration: 2; + unsigned int dyn_low: 2; + unsigned int dyn_high: 2; + unsigned int arrayisbytes: 1; + unsigned int elemisbytes: 1; + unsigned int elemorder: 1; + unsigned int justified: 1; + unsigned int unused: 11; + unsigned int arraylength; + dnttpointer indextype; + dnttpointer elemtype; + unsigned int elemlength; +}; + +/* DNTT_TYPE_STRUCT + + DNTT_TYPE_STRUCT is used to describe a C structure. + + DECLARATION describes the bitpacking used. + + FIRSTFIELD is a DNTT pointer to the first field of the structure + (each field contains a pointer to the next field, walk the list + to access all fields of the structure). + + VARTAGFIELD and VARLIST are used for Pascal variant records. + + BITLENGTH is the size of the structure in bits. */ + +struct dntt_type_struct +{ + unsigned int extension: 1; + unsigned int kind: 10; + unsigned int declaration: 2; + unsigned int unused: 19; + dnttpointer firstfield; + dnttpointer vartagfield; + dnttpointer varlist; + unsigned int bitlength; +}; + +/* DNTT_TYPE_UNION + + DNTT_TYPE_UNION is used to describe a C union. + + FIRSTFIELD is a DNTT pointer to the beginning of the field chain. + + BITLENGTH is the size of the union in bits. */ + +struct dntt_type_union +{ + unsigned int extension: 1; + unsigned int kind: 10; + unsigned int unused: 21; + dnttpointer firstfield; + unsigned int bitlength; +}; + +/* DNTT_TYPE_FIELD + + DNTT_TYPE_FIELD describes one field in a structure or union + or C++ class. + + VISIBILITY is used to describe the visibility of the field + (for c++. public = 0, protected = 1, private = 2). + + A_UNION is nonzero if this field is a member of an anonymous union. + + STATICMEM is nonzero if this field is a static member of a template. + + NAME is a pointer into the VT for the name of the field. + + BITOFFSET gives the offset of this field in bits from the beginning + of the structure or union this field is a member of. + + TYPE is a DNTT pointer to the type describing this field. + + BITLENGTH is the size of the entry in bits. + + NEXTFIELD is a DNTT pointer to the next field in the chain. */ + +struct dntt_type_field +{ + unsigned int extension: 1; + unsigned int kind: 10; + unsigned int visibility: 2; + unsigned int a_union: 1; + unsigned int staticmem: 1; + unsigned int unused: 17; + vtpointer name; + unsigned int bitoffset; + dnttpointer type; + unsigned int bitlength; + dnttpointer nextfield; +}; + +/* DNTT_TYPE_VARIANT is unused by GDB. */ +/* DNTT_TYPE_FILE is unused by GDB. */ + +/* DNTT_TYPE_FUNCTYPE + + I think this is used to describe a function type (e.g., would + be emitted as part of a function-pointer description). + + VARARGS is nonzero if this function uses varargs. + + FIRSTPARAM is a DNTT pointer to the first entry in the parameter + chain. + + RETVAL is a DNTT pointer to the type of the return value. */ + +struct dntt_type_functype +{ + unsigned int extension: 1; + unsigned int kind: 10; + unsigned int varargs: 1; + unsigned int info: 4; + unsigned int unused: 16; + unsigned int bitlength; + dnttpointer firstparam; + dnttpointer retval; +}; + +/* DNTT_TYPE_WITH is emitted by C++ to indicate "with" scoping semantics. + (Probably also emitted by PASCAL to support "with"...). + + C++ example: Say "memfunc" is a method of class "c", and say + "m" is a data member of class "c". Then from within "memfunc", + it is legal to reference "m" directly (e.g. you don't have to + say "this->m". The symbol table indicates + this by emitting a DNTT_TYPE_WITH symbol within the function "memfunc", + pointing to the type symbol for class "c". + + In GDB, this symbol record is unnecessary, + because GDB's symbol lookup algorithm + infers the "with" semantics when it sees a "this" argument to the member + function. So GDB can safely ignore the DNTT_TYPE_WITH record. + + A DNTT_TYPE_WITH has a matching DNTT_TYPE_END symbol. */ + +struct dntt_type_with +{ + unsigned int extension: 1; /* always zero */ + unsigned int kind: 10; /* always DNTT_TYPE_WITH */ + unsigned int addrtype: 2; /* 0 => STATTYPE */ + /* 1 => DYNTYPE */ + /* 2 => REGTYPE */ + unsigned int indirect: 1; /* 1 => pointer to object */ + unsigned int longaddr: 1; /* 1 => in long pointer space */ + unsigned int nestlevel: 6; /* # of nesting levels back */ + unsigned int doc_ranges: 1; /* 1 => location is range list */ + unsigned int unused: 10; + long location; /* where stored (allocated) */ + sltpointer address; + dnttpointer type; /* type of with expression */ + vtpointer name; /* name of with expression */ + unsigned long offset; /* byte offset from location */ +}; + +/* DNTT_TYPE_COMMON is unsupported by GDB. */ +/* A DNTT_TYPE_COMMON symbol must have a matching DNTT_TYPE_END symbol */ + +/* DNTT_TYPE_COBSTRUCT is unsupported by GDB. */ +/* DNTT_TYPE_XREF is unsupported by GDB. */ +/* DNTT_TYPE_SA is unsupported by GDB. */ +/* DNTT_TYPE_MACRO is unsupported by GDB */ + +/* DNTT_TYPE_BLOCKDATA has the same structure as DNTT_TYPE_FUNCTION */ + +/* The following are the C++ specific SOM records */ + +/* The purpose of the DNTT_TYPE_CLASS_SCOPE is to bracket C++ methods + and indicate the method name belongs in the "class scope" rather + than in the module they are being defined in. For example: + + class c { + ... + void memfunc(); // member function + }; + + void c::memfunc() // definition of class c's "memfunc" + { + ... + } + + main() + { + ... + } + + In the above, the name "memfunc" is not directly visible from "main". + I.e., you have to say "break c::memfunc". + If it were a normal function (not a method), it would be visible + via the simple "break memfunc". Since "memfunc" otherwise looks + like a normal FUNCTION in the symbol table, the bracketing + CLASS_SCOPE is what is used to indicate it is really a method. + + + A DNTT_TYPE_CLASS_SCOPE symbol must have a matching DNTT_TYPE_END symbol. */ + +struct dntt_type_class_scope +{ + unsigned int extension: 1; /* Always zero. */ + unsigned int kind: 10; /* Always DNTT_TYPE_CLASS_SCOPE. */ + unsigned int unused: 21; + sltpointer address ; /* Pointer to SLT entry. */ + dnttpointer type ; /* Pointer to class type DNTT. */ +}; + +/* C++ reference parameter. + The structure of this record is the same as DNTT_TYPE_POINTER - + refer to struct dntt_type_pointer. */ + +/* The next two describe C++ pointer-to-data-member type, and + pointer-to-member-function type, respectively. + DNTT_TYPE_PTRMEM and DNTT_TYPE_PTRMEMFUNC have the same structure. */ + +struct dntt_type_ptrmem +{ + unsigned int extension: 1; /* Always zero. */ + unsigned int kind: 10; /* Always DNTT_TYPE_PTRMEM. */ + unsigned int unused: 21; + dnttpointer pointsto ; /* Pointer to class DNTT. */ + dnttpointer memtype ; /* Type of member. */ +}; + +struct dntt_type_ptrmemfunc +{ + unsigned int extension: 1; /* Always zero. */ + unsigned int kind: 10; /* Always DNTT_TYPE_PTRMEMFUNC. */ + unsigned int unused: 21; + dnttpointer pointsto ; /* Pointer to class DNTT. */ + dnttpointer memtype ; /* Type of member. */ +}; + +/* The DNTT_TYPE_CLASS symbol is emitted to describe a class type. + "memberlist" points to a chained list of FIELD or GENFIELD records + indicating the class members. "parentlist" points to a chained list + of INHERITANCE records indicating classes from which we inherit + fields. */ + +struct dntt_type_class +{ + unsigned int extension: 1; /* Always zero. */ + unsigned int kind: 10; /* Always DNTT_TYPE_CLASS. */ + unsigned int abstract: 1; /* Is this an abstract class? */ + unsigned int class_decl: 2; /* 0=class,1=union,2=struct. */ + unsigned int expansion: 1; /* 1=template expansion. */ + unsigned int unused: 17; + dnttpointer memberlist ; /* Ptr to chain of [GEN]FIELDs. */ + unsigned long vtbl_loc ; /* Offset in obj of ptr to vtbl. */ + dnttpointer parentlist ; /* Ptr to K_INHERITANCE list. */ + unsigned long bitlength ; /* Total at this level. */ + dnttpointer identlist ; /* Ptr to chain of class ident's. */ + dnttpointer friendlist ; /* Ptr to K_FRIEND list. */ + dnttpointer templateptr ; /* Ptr to template. */ + dnttpointer nextexp ; /* Ptr to next expansion. */ +}; + +/* Class members are indicated via either the FIELD record (for + data members, same as for C struct fields), or by the GENFIELD record + (for member functions). */ + +struct dntt_type_genfield +{ + unsigned int extension: 1; /* Always zero. */ + unsigned int kind: 10; /* Always DNTT_TYPE_GENFIELD. */ + unsigned int visibility: 2; /* Pub = 0, prot = 1, priv = 2. */ + unsigned int a_union: 1; /* 1 => anonymous union member. */ + unsigned int unused: 18; + dnttpointer field ; /* Pointer to field or qualifier. */ + dnttpointer nextfield ; /* Pointer to next field. */ +}; + +/* C++ virtual functions. */ + +struct dntt_type_vfunc +{ + unsigned int extension: 1; /* always zero */ + unsigned int kind: 10; /* always DNTT_TYPE_VFUNC */ + unsigned int pure: 1; /* pure virtual function ? */ + unsigned int unused: 20; + dnttpointer funcptr ; /* points to FUNCTION symbol */ + unsigned long vtbl_offset ; /* offset into vtbl for virtual */ +}; + +/* Not precisely sure what this is intended for - DDE ignores it. */ + +struct dntt_type_memaccess +{ + unsigned int extension: 1; /* always zero */ + unsigned int kind: 10; /* always DNTT_TYPE_MEMACCESS */ + unsigned int unused: 21; + dnttpointer classptr ; /* pointer to base class */ + dnttpointer field ; /* pointer field */ +}; + +/* The DNTT_TYPE_INHERITANCE record describes derived classes. + In particular, the "parentlist" field of the CLASS record points + to a list of INHERITANCE records for classes from which we + inherit members. */ + +struct dntt_type_inheritance +{ + unsigned int extension: 1; /* always zero */ + unsigned int kind: 10; /* always DNTT_TYPE_INHERITANCE */ + unsigned int Virtual: 1; /* virtual base class ? */ + unsigned int visibility: 2; /* pub = 0, prot = 1, priv = 2 */ + unsigned int unused: 18; + dnttpointer classname ; /* first parent class, if any */ + unsigned long offset ; /* offset to start of base class */ + dnttpointer next ; /* pointer to next K_INHERITANCE */ + unsigned long future[2] ; /* padding to 3-word block end */ +}; + +/* C++ "friend" classes ... */ + +struct dntt_type_friend_class +{ + unsigned int extension: 1; /* always zero */ + unsigned int kind: 10; /* always DNTT_TYPE_FRIEND_CLASS */ + unsigned int unused: 21; + dnttpointer classptr ; /* pointer to class DNTT */ + dnttpointer next ; /* next DNTT_FRIEND */ +}; + +struct dntt_type_friend_func +{ + unsigned int extension: 1; /* always zero */ + unsigned int kind: 10; /* always DNTT_TYPE_FRIEND_FUNC */ + unsigned int unused: 21; + dnttpointer funcptr ; /* pointer to function */ + dnttpointer classptr ; /* pointer to class DNTT */ + dnttpointer next ; /* next DNTT_FRIEND */ + unsigned long future[2] ; /* padding to 3-word block end */ +}; + +/* DDE appears to ignore the DNTT_TYPE_MODIFIER record. + It could perhaps be used to give better "ptype" output in GDB; + otherwise it is probably safe for GDB to ignore it also. */ + +struct dntt_type_modifier +{ + unsigned int extension: 1; /* always zero */ + unsigned int kind: 10; /* always DNTT_TYPE_MODIFIER */ + unsigned int m_const: 1; /* const */ + unsigned int m_static: 1; /* static */ + unsigned int m_void: 1; /* void */ + unsigned int m_volatile: 1; /* volatile */ + unsigned int m_duplicate: 1; /* duplicate */ + unsigned int unused: 16; + dnttpointer type ; /* subtype */ + unsigned long future ; /* padding to 3-word block end */ +}; + +/* I'm not sure what this was intended for - DDE ignores it. */ + +struct dntt_type_object_id +{ + unsigned int extension: 1; /* always zero */ + unsigned int kind: 10; /* always DNTT_TYPE_OBJECT_ID */ + unsigned int indirect: 1; /* Is object_ident addr of addr? */ + unsigned int unused: 20; + unsigned long object_ident ; /* object identifier */ + unsigned long offset ; /* offset to start of base class */ + dnttpointer next ; /* pointer to next K_OBJECT_ID */ + unsigned long segoffset ; /* for linker fixup */ + unsigned long future ; /* padding to 3-word block end */ +}; + +/* No separate dntt_type_memfunc; same as dntt_type_func */ + +/* Symbol records to support templates. These only get used + in DDE's "describe" output (like GDB's "ptype"). */ + +/* The TEMPLATE record is the header for a template-class. + Like the CLASS record, a TEMPLATE record has a memberlist that + points to a list of template members. It also has an arglist + pointing to a list of TEMPLATE_ARG records. */ + +struct dntt_type_template +{ + unsigned int extension: 1; /* always zero */ + unsigned int kind: 10; /* always DNTT_TYPE_TEMPLATE */ + unsigned int abstract: 1; /* is this an abstract class? */ + unsigned int class_decl: 2; /* 0=class,1=union,2=struct */ + unsigned int unused: 18; + dnttpointer memberlist ; /* ptr to chain of K_[GEN]FIELDs */ + long unused2 ; /* offset in obj of ptr to vtbl */ + dnttpointer parentlist ; /* ptr to K_INHERITANCE list */ + unsigned long bitlength ; /* total at this level */ + dnttpointer identlist ; /* ptr to chain of class ident's */ + dnttpointer friendlist ; /* ptr to K_FRIEND list */ + dnttpointer arglist ; /* ptr to argument list */ + dnttpointer expansions ; /* ptr to expansion list */ +}; + +/* Template-class arguments are a list of TEMPL_ARG records + chained together. The "name" field is the name of the formal. + E.g.: + + template <class T> class q { ... }; + + Then "T" is the name of the formal argument. */ + +struct dntt_type_templ_arg +{ + unsigned int extension: 1; /* always zero */ + unsigned int kind: 10; /* always DNTT_TYPE_TEMPL_ARG */ + unsigned int usagetype: 1; /* 0 type-name 1 expression */ + unsigned int unused: 20; + vtpointer name ; /* name of argument */ + dnttpointer type ; /* for non type arguments */ + dnttpointer nextarg ; /* Next argument if any */ + long future[2] ; /* padding to 3-word block end */ +}; + +/* FUNC_TEMPLATE records are sort of like FUNCTION, but are emitted + for template member functions. E.g., + + template <class T> class q + { + ... + void f(); + ... + }; + + Within the list of FIELDs/GENFIELDs defining the member list + of the template "q", "f" would appear as a FUNC_TEMPLATE. + We'll also see instances of FUNCTION "f" records for each + instantiation of the template. */ + +struct dntt_type_func_template +{ + unsigned int extension: 1; /* always zero */ + unsigned int kind: 10; /* always DNTT_TYPE_FUNC_TEMPLATE */ + unsigned int public: 1; /* 1 => globally visible */ + unsigned int language: 4; /* type of language */ + unsigned int level: 5; /* nesting level (top level = 0)*/ + unsigned int optimize: 2; /* level of optimization */ + unsigned int varargs: 1; /* ellipses. Pascal/800 later */ + unsigned int info: 4; /* lang-specific stuff; F_xxxx */ + unsigned int inlined: 1; + unsigned int localloc: 1; /* 0 at top, 1 at end of block */ + unsigned int unused: 2; + vtpointer name ; /* name of function */ + vtpointer alias ; /* alternate name, if any */ + dnttpointer firstparam ; /* first FPARAM, if any */ + dnttpointer retval ; /* return type, if any */ + dnttpointer arglist ; /* ptr to argument list */ +}; + +/* LINK is apparently intended to link together function template + definitions with their instantiations. However, it is not clear + why this would be needed, except to provide the information on + a "ptype" command. And as far as I can tell, aCC does not + generate this record. */ + +struct dntt_type_link +{ + unsigned int extension: 1; /* always zero */ + unsigned int kind: 10; /* always DNTT_TYPE_LINK */ + unsigned int linkKind: 4; /* always LINK_UNKNOWN */ + unsigned int unused: 17; + long future1 ; /* expansion */ + dnttpointer ptr1 ; /* link from template */ + dnttpointer ptr2 ; /* to expansion */ + long future[2] ; /* padding to 3-word block end */ +}; + +/* end of C++ specific SOM's. */ + +/* DNTT_TYPE_DYN_ARRAY_DESC is unused by GDB */ +/* DNTT_TYPE_DESC_SUBRANGE is unused by GDB */ +/* DNTT_TYPE_BEGIN_EXT is unused by GDB */ +/* DNTT_TYPE_INLN is unused by GDB */ +/* DNTT_TYPE_INLN_LIST is unused by GDB */ +/* DNTT_TYPE_ALIAS is unused by GDB */ + +struct dntt_type_doc_function +{ + unsigned int extension: 1; /* always zero */ + unsigned int kind: 10; /* K_DOC_FUNCTION or */ + /* K_DOC_MEMFUNC */ + unsigned int global: 1; /* 1 => globally visible */ + unsigned int language: 4; /* type of language */ + unsigned int level: 5; /* nesting level (top level = 0)*/ + unsigned int optimize: 2; /* level of optimization */ + unsigned int varargs: 1; /* ellipses. Pascal/800 later */ + unsigned int info: 4; /* lang-specific stuff; F_xxxx */ + unsigned int inlined: 1; + unsigned int localloc: 1; /* 0 at top, 1 at end of block */ + unsigned int expansion: 1; /* 1 = function expansion */ + unsigned int doc_clone: 1; + vtpointer name; /* name of function */ + vtpointer alias; /* alternate name, if any */ + dnttpointer firstparam; /* first FPARAM, if any */ + sltpointer address; /* code and text locations */ + CORE_ADDR entryaddr; /* address of entry point */ + dnttpointer retval; /* return type, if any */ + CORE_ADDR lowaddr; /* lowest address of function */ + CORE_ADDR hiaddr; /* highest address of function */ + dnttpointer inline_list; /* pointer to first inline */ + ltpointer lt_offset; /* start of frag/cp line table */ + ctxtpointer ctxt_offset; /* start of context table for this routine */ +}; + +/* DNTT_TYPE_DOC_MEMFUNC is unused by GDB */ + +/* DNTT_TYPE_GENERIC and DNTT_TYPE_BLOCK are convience structures + so we can examine a DNTT entry in a generic fashion. */ +struct dntt_type_generic +{ + unsigned int word[9]; +}; + +struct dntt_type_block +{ + unsigned int extension: 1; + unsigned int kind: 10; + unsigned int unused: 21; + unsigned int word[2]; +}; + +/* One entry in a DNTT (either the LNTT or GNTT). + This is a union of the above 60 or so structure definitions. */ + +union dnttentry +{ + struct dntt_type_srcfile dsfile; + struct dntt_type_module dmodule; + struct dntt_type_function dfunc; + struct dntt_type_function dentry; + struct dntt_type_begin dbegin; + struct dntt_type_end dend; + struct dntt_type_fparam dfparam; + struct dntt_type_svar dsvar; + struct dntt_type_dvar ddvar; + struct dntt_type_const dconst; + struct dntt_type_type dtype; + struct dntt_type_type dtag; + struct dntt_type_pointer dptr; + struct dntt_type_enum denum; + struct dntt_type_memenum dmember; + struct dntt_type_set dset; + struct dntt_type_subrange dsubr; + struct dntt_type_array darray; + struct dntt_type_struct dstruct; + struct dntt_type_union dunion; + struct dntt_type_field dfield; + struct dntt_type_functype dfunctype; + struct dntt_type_with dwith; + struct dntt_type_function dblockdata; + struct dntt_type_class_scope dclass_scope; + struct dntt_type_pointer dreference; + struct dntt_type_ptrmem dptrmem; + struct dntt_type_ptrmemfunc dptrmemfunc; + struct dntt_type_class dclass; + struct dntt_type_genfield dgenfield; + struct dntt_type_vfunc dvfunc; + struct dntt_type_memaccess dmemaccess; + struct dntt_type_inheritance dinheritance; + struct dntt_type_friend_class dfriend_class; + struct dntt_type_friend_func dfriend_func; + struct dntt_type_modifier dmodifier; + struct dntt_type_object_id dobject_id; + struct dntt_type_template dtemplate; + struct dntt_type_templ_arg dtempl_arg; + struct dntt_type_func_template dfunc_template; + struct dntt_type_link dlink; + struct dntt_type_doc_function ddocfunc; + struct dntt_type_generic dgeneric; + struct dntt_type_block dblock; +}; + +/* Source line entry types. */ +enum slttype +{ + SLT_NORMAL, + SLT_SRCFILE, + SLT_MODULE, + SLT_FUNCTION, + SLT_ENTRY, + SLT_BEGIN, + SLT_END, + SLT_WITH, + SLT_EXIT, + SLT_ASSIST, + SLT_MARKER, + SLT_CLASS_SCOPE, + SLT_INLN, + SLT_NORMAL_OFFSET, +}; + +/* A normal source line entry. Simply provides a mapping of a source + line number to a code address. + + SLTDESC will always be SLT_NORMAL or SLT_EXIT. */ + +struct slt_normal +{ + unsigned int sltdesc: 4; + unsigned int line: 28; + CORE_ADDR address; +}; + +struct slt_normal_off +{ + unsigned int sltdesc: 4; + unsigned int offset: 6; + unsigned int line: 22; + CORE_ADDR address; +}; + +/* A special source line entry. Provides a mapping of a declaration + to a line number. These entries point back into the DNTT which + references them. */ + +struct slt_special +{ + unsigned int sltdesc: 4; + unsigned int line: 28; + dnttpointer backptr; +}; + +/* Used to describe nesting. + + For nested languages, an slt_assist entry must follow each SLT_FUNC + entry in the SLT. The address field will point forward to the + first slt_normal entry within the function's scope. */ + +struct slt_assist +{ + unsigned int sltdesc: 4; + unsigned int unused: 28; + sltpointer address; +}; + +struct slt_generic +{ + unsigned int word[2]; +}; + +union sltentry +{ + struct slt_normal snorm; + struct slt_normal_off snormoff; + struct slt_special sspec; + struct slt_assist sasst; + struct slt_generic sgeneric; +}; + +/* $LINES$ declarations + This is the line table used for optimized code, which is only present + in the new $PROGRAM_INFO$ debug space. */ + +#define DST_LN_ESCAPE_FLAG1 15 +#define DST_LN_ESCAPE_FLAG2 14 +#define DST_LN_CTX_SPEC1 13 +#define DST_LN_CTX_SPEC2 12 + +/* Escape function codes: */ + +typedef enum +{ + dst_ln_pad, /* pad byte */ + dst_ln_escape_1, /* reserved */ + dst_ln_dpc1_dln1, /* 1 byte line delta, 1 byte pc delta */ + dst_ln_dpc2_dln2, /* 2 bytes line delta, 2 bytes pc delta */ + dst_ln_pc4_ln4, /* 4 bytes ABSOLUTE line number, 4 bytes ABSOLUTE pc */ + dst_ln_dpc0_dln1, /* 1 byte line delta, pc delta = 0 */ + dst_ln_ln_off_1, /* statement escape, stmt # = 1 (2nd stmt on line) */ + dst_ln_ln_off, /* statement escape, stmt # = next byte */ + dst_ln_entry, /* entry escape, next byte is entry number */ + dst_ln_exit, /* exit escape */ + dst_ln_stmt_end, /* gap escape, 4 bytes pc delta */ + dst_ln_stmt_cp, /* current stmt is a critical point */ + dst_ln_escape_12, /* reserved */ + dst_ln_escape_13, /* this is an exception site record */ + dst_ln_nxt_byte, /* next byte contains the real escape code */ + dst_ln_end, /* end escape, final entry follows */ + dst_ln_escape1_END_OF_ENUM +} +dst_ln_escape1_t; + +typedef enum +{ + dst_ln_ctx_1, /* next byte describes context switch with 5-bit */ + /* index into the image table and 3-bit run length. */ + /* If run length is 0, end with another cxt specifier or ctx_end */ + dst_ln_ctx_2, /* next 2 bytes switch context: 13 bit index, 3 bit run length */ + dst_ln_ctx_4, /* next 4 bytes switch context: 29 bit index, 3 bit run length */ + dst_ln_ctx_end, /* end current context */ + dst_ln_col_run_1, /* next byte is column position of start of next statement, */ + /* following byte is length of statement */ + dst_ln_col_run_2, /* next 2 bytes is column position of start of next statement, */ + /* following 2 bytes is length of statement */ + dst_ln_init_base1, /* next 4 bytes are absolute PC, followed by 1 byte of line number */ + dst_ln_init_base2, /* next 4 bytes are absolute PC, followed by 2 bytes of line number */ + dst_ln_init_base3, /* next 4 bytes are absolute PC, followed by 3 bytes of line number */ + dst_ln_escape2_END_OF_ENUM +} +dst_ln_escape2_t; + +typedef union +{ + struct + { + unsigned int pc_delta : 4; /* 4 bit pc delta */ + int ln_delta : 4; /* 4 bit line number delta */ + } + delta; + + struct + { + unsigned int esc_flag : 4; /* alias for pc_delta */ + unsigned int esc_code : 4; /* escape function code (dst_ln_escape1_t, or ...2_t */ + } + esc; + + struct + { + unsigned int esc_flag : 4; /* dst_ln_ctx_spec1, or dst_ln_ctx_spec2 */ + unsigned int run_length : 2; + unsigned int ctx_index : 2; /* ...spec2 contains index; ...spec1, index - 4 */ + } + ctx_spec; + + char sdata; /* signed data byte */ + unsigned char udata; /* unsigned data byte */ +} +dst_ln_entry_t, + * dst_ln_entry_ptr_t; + +/* Warning: although the above union occupies only 1 byte the compiler treats + it as having size 2 (the minimum size of a struct). Therefore a sequence of + dst_ln_entry_t's cannot be described as an array, and walking through such a + sequence requires convoluted code such as + ln_ptr = (dst_ln_entry_ptr_t) (char*) ln_ptr + 1 + We regret the inconvenience. */ + +/* Structure for interpreting the byte following a dst_ln_ctx1 entry. */ +typedef struct +{ + unsigned int ctx1_index : 5; /* 5 bit index into context table */ + unsigned int ctx1_run_length : 3; /* 3 bit run length */ +} dst_ln_ctx1_t, + *dst_ln_ctx1_ptr_t; + +/* Structure for interpreting the bytes following a dst_ln_ctx2 entry. */ +typedef struct +{ + unsigned int ctx2_index : 13; /* 13 bit index into context table */ + unsigned int ctx2_run_length : 3; /* 3 bit run length */ +} dst_ln_ctx2_t, + *dst_ln_ctx2_ptr_t; + +/* Structure for interpreting the bytes following a dst_ln_ctx4 entry. */ +typedef struct +{ + unsigned int ctx4_index : 29; /* 29 bit index into context table */ + unsigned int ctx4_run_length : 3; /* 3 bit run length */ +} dst_ln_ctx4_t, + *dst_ln_ctx4_ptr_t; + + +/* PXDB definitions. + + PXDB is a post-processor which takes the executable file + and massages the debug information so that the debugger may + start up and run more efficiently. Some of the tasks + performed by PXDB are: + + o Remove duplicate global type and variable information + from the GNTT, + + o Append the GNTT onto the end of the LNTT and place both + back in the LNTT section, + + o Build quick look-up tables (description follows) for + files, procedures, modules, and paragraphs (for Cobol), + placing these in the GNTT section, + + o Reconstruct the header appearing in the header section + to access this information. + + The "quick look-up" tables are in the $GNTT$ sub-space, in + the following order: + + Procedures -sorted by address + Source files -sorted by address (of the + generated code from routines) + Modules -sorted by address + Classes -<unsorted?> + Address Alias -sorted by index <?> + Object IDs -sorted by object identifier + + Most quick entries have (0-based) indices into the LNTT tables to + the full entries for the item it describes. + + The post-PXDB header is in the $HEADER$ sub-space. Alas, it + occurs in different forms, depending on the optimization level + in the compilation step and whether PXDB was run or not. The + worst part is the forms aren't self-describing, so we'll have + to grovel in the bits to figure out what kind we're looking at + (see hp_get_header in hp-psymtab-read.c). */ + +/* PXDB versions. */ + +#define PXDB_VERSION_CPLUSPLUS 1 +#define PXDB_VERSION_7_4 2 +#define PXDB_VERSION_CPP_30 3 +#define PXDB_VERSION_DDE_3_2A 4 +#define PXDB_VERSION_DDE_3_2 5 +#define PXDB_VERSION_DDE_4_0 6 + +#define PXDB_VERSION_2_1 1 + +/* Header version for the case that there is no DOC info + but the executable has been processed by pxdb (the easy + case, from "cc -g"). */ + +typedef struct PXDB_struct +{ + int pd_entries; /* # of entries in function look-up table */ + int fd_entries; /* # of entries in file look-up table */ + int md_entries; /* # of entries in module look-up table */ + unsigned int pxdbed : 1; /* 1 => file has been preprocessed */ + unsigned int bighdr : 1; /* 1 => this header contains 'time' word */ + unsigned int sa_header : 1;/* 1 => created by SA version of pxdb */ + /* used for version check in xdb */ + unsigned int inlined: 1; /* one or more functions have been inlined */ + unsigned int spare:12; + short version; /* pxdb header version */ + int globals; /* index into the DNTT where GNTT begins */ + unsigned int time; /* modify time of file before being pxdbed */ + int pg_entries; /* # of entries in label look-up table */ + int functions; /* actual number of functions */ + int files; /* actual number of files */ + int cd_entries; /* # of entries in class look-up table */ + int aa_entries; /* # of entries in addr alias look-up table */ + int oi_entries; /* # of entries in object id look-up table */ +} PXDB_header, *PXDB_header_ptr; + +/* Header version for the case that there is no DOC info and the + executable has NOT been processed by pxdb. */ + +typedef struct XDB_header_struct +{ + long gntt_length; + long lntt_length; + long slt_length; + long vt_length; + long xt_length; +} XDB_header; + +/* Header version for the case that there is DOC info and the + executable has been processed by pxdb. */ + +typedef struct DOC_info_PXDB_header_struct +{ + unsigned int xdb_header: 1; /* bit set if this is post-3.1 xdb */ + unsigned int doc_header: 1; /* bit set if this is doc-style header */ + unsigned int version: 8; /* version of pxdb see defines + PXDB_VERSION_* in this file. */ + unsigned int reserved_for_flags: 16;/* for future use; -- must be + set to zero. */ + unsigned int has_aux_pd_table: 1; /* $GNTT$ has aux PD table */ + unsigned int has_expr_table: 1; /* space has $EXPR$ */ + unsigned int has_range_table: 1; /* space has $RANGE$ */ + unsigned int has_context_table: 1; /* space has $SRC_CTXT$ */ + unsigned int has_lines_table: 1; /* space contains a $LINES$ + subspace for line tables. */ + unsigned int has_lt_offset_map: 1; /* space contains an lt_offset + subspace for line table mapping. */ + /* The following fields are the same as those in the PXDB_header in $DEBUG$ */ + int pd_entries; /* # of entries in function look-up table */ + int fd_entries; /* # of entries in file look-up table */ + int md_entries; /* # of entries in module look-up table */ + unsigned int pxdbed : 1; /* 1 => file has been preprocessed */ + unsigned int bighdr : 1; /* 1 => this header contains 'time' word */ + unsigned int sa_header : 1;/* 1 => created by SA version of pxdb */ + /* used for version check in xdb */ + unsigned int inlined: 1; /* one or more functions have been inlined */ + unsigned int spare : 28; + int globals; /* index into the DNTT where GNTT begins */ + unsigned int time; /* modify time of file before being pxdbed */ + int pg_entries; /* # of entries in label look-up table */ + int functions; /* actual number of functions */ + int files; /* actual number of files */ + int cd_entries; /* # of entries in class look-up table */ + int aa_entries; /* # of entries in addr alias look-up table */ + int oi_entries; /* # of entries in object id look-up table */ +} DOC_info_PXDB_header; + +/* Header version for the case that there is DOC info and the + executable has NOT been processed by pxdb. */ + +typedef struct DOC_info_header_struct +{ + unsigned int xdb_header: 1; /* bit set if this is post-3.1 xdb */ + unsigned int doc_header: 1; /* bit set if this is doc-style header*/ + unsigned int version: 8; /* version of debug/header + format. For 10.0 the value + will be 1. For "Davis" the value is 2. */ + unsigned int reserved_for_flags: 18; /* for future use; -- must be set to zero. */ + unsigned int has_range_table: 1; /* space contains a $RANGE$ subspace for variable ranges. */ + unsigned int has_context_table: 1; /* space contains a $CTXT$ subspace for context/inline table. */ + unsigned int has_lines_table: 1; /* space contains a $LINES$ subspace for line tables. */ + unsigned int has_lt_offset_map: 1; /* space contains an lt_offset subspace for line table mapping. */ + + long gntt_length; /* same as old header */ + long lntt_length; /* same as old header */ + long slt_length; /* same as old header */ + long vt_length; /* same as old header */ + long xt_length; /* same as old header */ + long ctxt_length; /* present only if version >= 2 */ + long range_length; /* present only if version >= 2 */ + long expr_length; /* present only if version >= 2 */ + +} DOC_info_header; + +typedef union GenericDebugHeader_union +{ + PXDB_header no_doc; + DOC_info_PXDB_header doc; + XDB_header no_pxdb_no_doc; + DOC_info_header no_pxdb_doc; +} GenericDebugHeader; + + +/* Procedure Descriptor: + An element of the procedure quick look-up table. */ + +typedef struct quick_procedure +{ + long isym; /* 0-based index of first symbol + for procedure in $LNTT$, + i.e. the procedure itself. */ + CORE_ADDR adrStart; /* memory adr of start of proc */ + CORE_ADDR adrEnd; /* memory adr of end of proc */ + char *sbAlias; /* alias name of procedure */ + char *sbProc; /* real name of procedure */ + CORE_ADDR adrBp; /* address of entry breakpoint */ + CORE_ADDR adrExitBp; /* address of exit breakpoint */ + int icd; /* member of this class (index) */ + unsigned int ipd; /* index of template for this */ + /* function (index) */ + unsigned int unused: 5; + unsigned int no_lt_offset: 1;/* no entry in lt_offset table */ + unsigned int fTemplate: 1; /* function template */ + unsigned int fExpansion: 1; /* function expansion */ + unsigned int linked : 1; /* linked with other expansions */ + unsigned int duplicate: 1; /* clone of another procedure */ + unsigned int overloaded:1; /* overloaded function */ + unsigned int member: 1; /* class member function */ + unsigned int constructor:1; /* constructor function */ + unsigned int destructor:1; /* destructor function */ + unsigned int Static: 1; /* static function */ + unsigned int Virtual: 1; /* virtual function */ + unsigned int constant: 1; /* constant function */ + unsigned int pure: 1; /* pure (virtual) function */ + unsigned int language: 4; /* procedure's language */ + unsigned int inlined: 1; /* function has been inlined */ + unsigned int Operator: 1; /* operator function */ + unsigned int stub: 1; /* bodyless function */ + unsigned int optimize: 2; /* optimization level */ + unsigned int level: 5; /* nesting level (top=0) */ +} quick_procedure_entry, *quick_procedure_entry_ptr; + +/* Source File Descriptor: + An element of the source file quick look-up table. */ + +typedef struct quick_source +{ + long isym; /* 0-based index in $LNTT$ of + first symbol for this file. */ + CORE_ADDR adrStart; /* mem adr of start of file's code */ + CORE_ADDR adrEnd; /* mem adr of end of file's code */ + char *sbFile; /* name of source file */ + unsigned int fHasDecl: 1; /* do we have a .d file? */ + unsigned int fWarned: 1; /* have warned about age problems? */ + unsigned int fSrcfile: 1; /* 0 => include 1=> source */ + unsigned short ilnMac; /* lines in file (0 if don't know) */ + int ipd; /* 0-based index of first procedure + in this file, in the quick + look-up table of procedures. */ + unsigned int *rgLn; /* line pointer array, if any */ +} quick_file_entry, *quick_file_entry_ptr; + +/* Module Descriptor: + An element of the module quick reference table. */ + +typedef struct quick_module +{ + long isym; /* 0-based index of first + symbol for module. */ + CORE_ADDR adrStart; /* adr of start of mod. */ + CORE_ADDR adrEnd; /* adr of end of mod. */ + char *sbAlias; /* alias name of module */ + char *sbMod; /* real name of module */ + unsigned int imports: 1; /* module have any imports? */ + unsigned int vars_in_front: 1; /* module globals in front? */ + unsigned int vars_in_gaps: 1; /* module globals in gaps? */ + unsigned int language: 4; /* type of language */ + unsigned int unused : 25; + unsigned int unused2; /* space for future stuff */ +} quick_module_entry, *quick_module_entry_ptr; + +/* Auxiliary Procedure Descriptor: + An element of the auxiliary procedure quick look-up table. */ + +typedef struct quick_aux_procedure +{ + long isym_inln; /* start on inline list for proc */ + long spare; +} quick_aux_procedure_entry, *quick_aux_procedure_entry_ptr; + +/* Paragraph Descriptor: + An element of the paragraph quick look-up table. */ + +typedef struct quick_paragraph +{ + long isym; /* first symbol for label (index) */ + CORE_ADDR adrStart; /* memory adr of start of label */ + CORE_ADDR adrEnd; /* memory adr of end of label */ + char *sbLab; /* name of label */ + unsigned int inst; /* Used in xdb to store inst @ bp */ + unsigned int sect: 1; /* true = section, false = parag. */ + unsigned int unused: 31; /* future use */ +} quick_paragraph_entry, *quick_paragraph_entry_ptr; + +/* Class Descriptor: + An element of the class quick look-up table. */ + +typedef struct quick_class +{ + char *sbClass; /* name of class */ + long isym; /* class symbol (tag) */ + unsigned int type : 2; /* 0=class, 1=union, 2=struct */ + unsigned int fTemplate : 1;/* class template */ + unsigned int expansion : 1;/* template expansion */ + unsigned int unused :28; + sltpointer lowscope; /* beginning of defined scope */ + sltpointer hiscope; /* end of defined scope */ +} quick_class_entry, *quick_class_entry_ptr; + +/* Address Alias Entry + An element of the address alias quick look-up table. */ + +typedef struct quick_alias +{ + CORE_ADDR low; + CORE_ADDR high; + int index; + unsigned int unused : 31; + unsigned int alternate : 1; /* alternate unnamed aliases? */ +} quick_alias_entry, *quick_alias_entry_ptr; + +/* Object Identification Entry + An element of the object identification quick look-up table. */ + +typedef struct quick_obj_ID +{ + CORE_ADDR obj_ident; /* class identifier */ + long isym; /* class symbol */ + long offset; /* offset to object start */ +} quick_obj_ID_entry, *quick_obj_ID_entry_ptr; + +#endif /* HP_SYMTAB_INCLUDED */ |