c438b3af2a
Revise comments re linetable sorting. * buildsym.c (compare_line_numbers): Sort by pc, not by line. * coffread.c: Tell end_symtab to sort the line table. * coffread.c: Re-work a lot of the coff-specific stuff to use stuff in buildsym.c. This includes coff_finish_block, coff_context_stack, coff_local_symbols, coff_file_symbols, coff_global_symbols, coff_end_symtab and coff_add_symbol_to_list. (read_enum_type): Deal with it now that we have a "struct pending" not a "struct coff_pending". * buildsym.c (end_symtab): Don't realloc subfile->linetable.
1120 lines
35 KiB
C++
1120 lines
35 KiB
C++
/* Symbol table definitions for GDB.
|
||
Copyright (C) 1986, 1989, 1991, 1992 Free Software Foundation, Inc.
|
||
|
||
This file is part of GDB.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 2 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program; if not, write to the Free Software
|
||
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
||
|
||
#if !defined (SYMTAB_H)
|
||
#define SYMTAB_H 1
|
||
|
||
/* Some definitions and declarations to go with use of obstacks. */
|
||
|
||
#include "obstack.h"
|
||
#define obstack_chunk_alloc xmalloc
|
||
#define obstack_chunk_free free
|
||
|
||
/* Define a structure for the information that is common to all symbol types,
|
||
including minimal symbols, partial symbols, and full symbols. In a
|
||
multilanguage environment, some language specific information may need to
|
||
be recorded along with each symbol. */
|
||
|
||
struct general_symbol_info
|
||
{
|
||
/* Name of the symbol. This is a required field. Storage for the name is
|
||
allocated on the psymbol_obstack or symbol_obstack for the associated
|
||
objfile. */
|
||
|
||
char *name;
|
||
|
||
/* Value of the symbol. Which member of this union to use, and what
|
||
it means, depends on what kind of symbol this is and its
|
||
SYMBOL_CLASS. See comments there for more details. All of these
|
||
are in host byte order (though what they point to might be in
|
||
target byte order, e.g. LOC_CONST_BYTES). */
|
||
|
||
union
|
||
{
|
||
long value;
|
||
|
||
struct block *block;
|
||
|
||
char *bytes;
|
||
|
||
CORE_ADDR address;
|
||
|
||
/* for opaque typedef struct chain */
|
||
|
||
struct symbol *chain;
|
||
}
|
||
value;
|
||
|
||
/* Record the source code language that applies to this symbol.
|
||
This is used to select one of the fields from the language specific
|
||
union below. */
|
||
|
||
enum language language;
|
||
|
||
/* Since one and only one language can apply, wrap the language specific
|
||
information inside a union. */
|
||
|
||
union
|
||
{
|
||
struct cplus_specific /* For C++ */
|
||
{
|
||
char *demangled_name;
|
||
} cplus_specific;
|
||
struct chill_specific /* For Chill */
|
||
{
|
||
char *demangled_name;
|
||
} chill_specific;
|
||
} language_specific;
|
||
|
||
/* Which section is this symbol in? This is an index into
|
||
section_offsets for this objfile. Negative means that the symbol
|
||
does not get relocated relative to a section.
|
||
Disclaimer: currently this is just used for xcoff, so don't expect
|
||
all symbol-reading code to set it correctly. */
|
||
|
||
int section;
|
||
};
|
||
|
||
#define SYMBOL_NAME(symbol) (symbol)->ginfo.name
|
||
#define SYMBOL_VALUE(symbol) (symbol)->ginfo.value.value
|
||
#define SYMBOL_VALUE_ADDRESS(symbol) (symbol)->ginfo.value.address
|
||
#define SYMBOL_VALUE_BYTES(symbol) (symbol)->ginfo.value.bytes
|
||
#define SYMBOL_BLOCK_VALUE(symbol) (symbol)->ginfo.value.block
|
||
#define SYMBOL_VALUE_CHAIN(symbol) (symbol)->ginfo.value.chain
|
||
#define SYMBOL_LANGUAGE(symbol) (symbol)->ginfo.language
|
||
#define SYMBOL_SECTION(symbol) (symbol)->ginfo.section
|
||
|
||
#define SYMBOL_CPLUS_DEMANGLED_NAME(symbol) \
|
||
(symbol)->ginfo.language_specific.cplus_specific.demangled_name
|
||
|
||
|
||
extern int demangle; /* We reference it, so go ahead and declare it. */
|
||
|
||
/* Macro that initializes the language dependent portion of a symbol
|
||
depending upon the language for the symbol. */
|
||
|
||
#define SYMBOL_INIT_LANGUAGE_SPECIFIC(symbol,language) \
|
||
do { \
|
||
SYMBOL_LANGUAGE (symbol) = language; \
|
||
if (SYMBOL_LANGUAGE (symbol) == language_cplus) \
|
||
{ \
|
||
SYMBOL_CPLUS_DEMANGLED_NAME (symbol) = NULL; \
|
||
} \
|
||
else if (SYMBOL_LANGUAGE (symbol) == language_chill) \
|
||
{ \
|
||
SYMBOL_CHILL_DEMANGLED_NAME (symbol) = NULL; \
|
||
} \
|
||
else \
|
||
{ \
|
||
memset (&(symbol)->ginfo.language_specific, 0, \
|
||
sizeof ((symbol)->ginfo.language_specific)); \
|
||
} \
|
||
} while (0)
|
||
|
||
/* Macro that attempts to initialize the demangled name for a symbol,
|
||
based on the language of that symbol. If the language is set to
|
||
language_auto, it will attempt to find any demangling algorithm
|
||
that works and then set the language appropriately. If no demangling
|
||
of any kind is found, the language is set back to language_unknown,
|
||
so we can avoid doing this work again the next time we encounter
|
||
the symbol. Any required space to store the name is obtained from the
|
||
specified obstack. */
|
||
|
||
#define SYMBOL_INIT_DEMANGLED_NAME(symbol,obstack) \
|
||
do { \
|
||
char *demangled = NULL; \
|
||
if (SYMBOL_LANGUAGE (symbol) == language_cplus \
|
||
|| SYMBOL_LANGUAGE (symbol) == language_auto) \
|
||
{ \
|
||
demangled = \
|
||
cplus_demangle (SYMBOL_NAME (symbol), DMGL_PARAMS | DMGL_ANSI);\
|
||
if (demangled != NULL) \
|
||
{ \
|
||
SYMBOL_LANGUAGE (symbol) = language_cplus; \
|
||
SYMBOL_CPLUS_DEMANGLED_NAME (symbol) = \
|
||
obsavestring (demangled, strlen (demangled), (obstack)); \
|
||
free (demangled); \
|
||
} \
|
||
else \
|
||
{ \
|
||
SYMBOL_CPLUS_DEMANGLED_NAME (symbol) = NULL; \
|
||
} \
|
||
} \
|
||
if (demangled == NULL \
|
||
&& (SYMBOL_LANGUAGE (symbol) == language_chill \
|
||
|| SYMBOL_LANGUAGE (symbol) == language_auto)) \
|
||
{ \
|
||
demangled = \
|
||
chill_demangle (SYMBOL_NAME (symbol)); \
|
||
if (demangled != NULL) \
|
||
{ \
|
||
SYMBOL_LANGUAGE (symbol) = language_chill; \
|
||
SYMBOL_CHILL_DEMANGLED_NAME (symbol) = \
|
||
obsavestring (demangled, strlen (demangled), (obstack)); \
|
||
free (demangled); \
|
||
} \
|
||
else \
|
||
{ \
|
||
SYMBOL_CHILL_DEMANGLED_NAME (symbol) = NULL; \
|
||
} \
|
||
} \
|
||
if (SYMBOL_LANGUAGE (symbol) == language_auto) \
|
||
{ \
|
||
SYMBOL_LANGUAGE (symbol) = language_unknown; \
|
||
} \
|
||
} while (0)
|
||
|
||
/* Macro that returns the demangled name for a symbol based on the language
|
||
for that symbol. If no demangled name exists, returns NULL. */
|
||
|
||
#define SYMBOL_DEMANGLED_NAME(symbol) \
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(SYMBOL_LANGUAGE (symbol) == language_cplus \
|
||
? SYMBOL_CPLUS_DEMANGLED_NAME (symbol) \
|
||
: (SYMBOL_LANGUAGE (symbol) == language_chill \
|
||
? SYMBOL_CHILL_DEMANGLED_NAME (symbol) \
|
||
: NULL))
|
||
|
||
#define SYMBOL_CHILL_DEMANGLED_NAME(symbol) \
|
||
(symbol)->ginfo.language_specific.chill_specific.demangled_name
|
||
|
||
/* Macro that returns the "natural source name" of a symbol. In C++ this is
|
||
the "demangled" form of the name if demangle is on and the "mangled" form
|
||
of the name if demangle is off. In other languages this is just the
|
||
symbol name. The result should never be NULL. */
|
||
|
||
#define SYMBOL_SOURCE_NAME(symbol) \
|
||
(demangle && SYMBOL_DEMANGLED_NAME (symbol) != NULL \
|
||
? SYMBOL_DEMANGLED_NAME (symbol) \
|
||
: SYMBOL_NAME (symbol))
|
||
|
||
/* Macro that returns the "natural assembly name" of a symbol. In C++ this is
|
||
the "mangled" form of the name if demangle is off, or if demangle is on and
|
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asm_demangle is off. Otherwise if asm_demangle is on it is the "demangled"
|
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form. In other languages this is just the symbol name. The result should
|
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never be NULL. */
|
||
|
||
#define SYMBOL_LINKAGE_NAME(symbol) \
|
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(demangle && asm_demangle && SYMBOL_DEMANGLED_NAME (symbol) != NULL \
|
||
? SYMBOL_DEMANGLED_NAME (symbol) \
|
||
: SYMBOL_NAME (symbol))
|
||
|
||
/* From utils.c. */
|
||
extern int demangle;
|
||
extern int asm_demangle;
|
||
|
||
/* Macro that tests a symbol for a match against a specified name string.
|
||
First test the unencoded name, then looks for and test a C++ encoded
|
||
name if it exists. Note that whitespace is ignored while attempting to
|
||
match a C++ encoded name, so that "foo::bar(int,long)" is the same as
|
||
"foo :: bar (int, long)".
|
||
Evaluates to zero if the match fails, or nonzero if it succeeds. */
|
||
|
||
#define SYMBOL_MATCHES_NAME(symbol, name) \
|
||
(STREQ (SYMBOL_NAME (symbol), (name)) \
|
||
|| (SYMBOL_DEMANGLED_NAME (symbol) != NULL \
|
||
&& strcmp_iw (SYMBOL_DEMANGLED_NAME (symbol), (name)) == 0))
|
||
|
||
/* Macro that tests a symbol for an re-match against the last compiled regular
|
||
expression. First test the unencoded name, then look for and test a C++
|
||
encoded name if it exists.
|
||
Evaluates to zero if the match fails, or nonzero if it succeeds. */
|
||
|
||
#define SYMBOL_MATCHES_REGEXP(symbol) \
|
||
(re_exec (SYMBOL_NAME (symbol)) != 0 \
|
||
|| (SYMBOL_DEMANGLED_NAME (symbol) != NULL \
|
||
&& re_exec (SYMBOL_DEMANGLED_NAME (symbol)) != 0))
|
||
|
||
/* Define a simple structure used to hold some very basic information about
|
||
all defined global symbols (text, data, bss, abs, etc). The only required
|
||
information is the general_symbol_info.
|
||
|
||
In many cases, even if a file was compiled with no special options for
|
||
debugging at all, as long as was not stripped it will contain sufficient
|
||
information to build a useful minimal symbol table using this structure.
|
||
Even when a file contains enough debugging information to build a full
|
||
symbol table, these minimal symbols are still useful for quickly mapping
|
||
between names and addresses, and vice versa. They are also sometimes
|
||
used to figure out what full symbol table entries need to be read in. */
|
||
|
||
struct minimal_symbol
|
||
{
|
||
|
||
/* The general symbol info required for all types of symbols.
|
||
|
||
The SYMBOL_VALUE_ADDRESS contains the address that this symbol
|
||
corresponds to. */
|
||
|
||
struct general_symbol_info ginfo;
|
||
|
||
/* The info field is available for caching machine-specific information that
|
||
The AMD 29000 tdep.c uses it to remember things it has decoded from the
|
||
instructions in the function header, so it doesn't have to rederive the
|
||
info constantly (over a serial line). It is initialized to zero and
|
||
stays that way until target-dependent code sets it. Storage for any data
|
||
pointed to by this field should be allocated on the symbol_obstack for
|
||
the associated objfile. The type would be "void *" except for reasons
|
||
of compatibility with older compilers. This field is optional. */
|
||
|
||
char *info;
|
||
|
||
/* Classification types for this symbol. These should be taken as "advisory
|
||
only", since if gdb can't easily figure out a classification it simply
|
||
selects mst_unknown. It may also have to guess when it can't figure out
|
||
which is a better match between two types (mst_data versus mst_bss) for
|
||
example. Since the minimal symbol info is sometimes derived from the
|
||
BFD library's view of a file, we need to live with what information bfd
|
||
supplies. */
|
||
|
||
enum minimal_symbol_type
|
||
{
|
||
mst_unknown = 0, /* Unknown type, the default */
|
||
mst_text, /* Generally executable instructions */
|
||
mst_data, /* Generally initialized data */
|
||
mst_bss, /* Generally uninitialized data */
|
||
mst_abs, /* Generally absolute (nonrelocatable) */
|
||
/* For the mst_file* types, the names are only guaranteed to be unique
|
||
within a given .o file. */
|
||
mst_file_text, /* Static version of mst_text */
|
||
mst_file_data, /* Static version of mst_data */
|
||
mst_file_bss /* Static version of mst_bss */
|
||
} type;
|
||
|
||
};
|
||
|
||
#define MSYMBOL_INFO(msymbol) (msymbol)->info
|
||
#define MSYMBOL_TYPE(msymbol) (msymbol)->type
|
||
|
||
|
||
/* All of the name-scope contours of the program
|
||
are represented by `struct block' objects.
|
||
All of these objects are pointed to by the blockvector.
|
||
|
||
Each block represents one name scope.
|
||
Each lexical context has its own block.
|
||
|
||
The blockvector begins with some special blocks.
|
||
The GLOBAL_BLOCK contains all the symbols defined in this compilation
|
||
whose scope is the entire program linked together.
|
||
The STATIC_BLOCK contains all the symbols whose scope is the
|
||
entire compilation excluding other separate compilations.
|
||
Blocks starting with the FIRST_LOCAL_BLOCK are not special.
|
||
|
||
Each block records a range of core addresses for the code that
|
||
is in the scope of the block. The STATIC_BLOCK and GLOBAL_BLOCK
|
||
give, for the range of code, the entire range of code produced
|
||
by the compilation that the symbol segment belongs to.
|
||
|
||
The blocks appear in the blockvector
|
||
in order of increasing starting-address,
|
||
and, within that, in order of decreasing ending-address.
|
||
|
||
This implies that within the body of one function
|
||
the blocks appear in the order of a depth-first tree walk. */
|
||
|
||
struct blockvector
|
||
{
|
||
/* Number of blocks in the list. */
|
||
int nblocks;
|
||
/* The blocks themselves. */
|
||
struct block *block[1];
|
||
};
|
||
|
||
#define BLOCKVECTOR_NBLOCKS(blocklist) (blocklist)->nblocks
|
||
#define BLOCKVECTOR_BLOCK(blocklist,n) (blocklist)->block[n]
|
||
|
||
/* Special block numbers */
|
||
|
||
#define GLOBAL_BLOCK 0
|
||
#define STATIC_BLOCK 1
|
||
#define FIRST_LOCAL_BLOCK 2
|
||
|
||
struct block
|
||
{
|
||
|
||
/* Addresses in the executable code that are in this block. */
|
||
|
||
CORE_ADDR startaddr;
|
||
CORE_ADDR endaddr;
|
||
|
||
/* The symbol that names this block, if the block is the body of a
|
||
function; otherwise, zero. */
|
||
|
||
struct symbol *function;
|
||
|
||
/* The `struct block' for the containing block, or 0 if none.
|
||
|
||
The superblock of a top-level local block (i.e. a function in the
|
||
case of C) is the STATIC_BLOCK. The superblock of the
|
||
STATIC_BLOCK is the GLOBAL_BLOCK. */
|
||
|
||
struct block *superblock;
|
||
|
||
/* Version of GCC used to compile the function corresponding
|
||
to this block, or 0 if not compiled with GCC. When possible,
|
||
GCC should be compatible with the native compiler, or if that
|
||
is not feasible, the differences should be fixed during symbol
|
||
reading. As of 16 Apr 93, this flag is never used to distinguish
|
||
between gcc2 and the native compiler.
|
||
|
||
If there is no function corresponding to this block, this meaning
|
||
of this flag is undefined. */
|
||
|
||
unsigned char gcc_compile_flag;
|
||
|
||
/* Number of local symbols. */
|
||
|
||
int nsyms;
|
||
|
||
/* The symbols. If some of them are arguments, then they must be
|
||
in the order in which we would like to print them. */
|
||
|
||
struct symbol *sym[1];
|
||
};
|
||
|
||
#define BLOCK_START(bl) (bl)->startaddr
|
||
#define BLOCK_END(bl) (bl)->endaddr
|
||
#define BLOCK_NSYMS(bl) (bl)->nsyms
|
||
#define BLOCK_SYM(bl, n) (bl)->sym[n]
|
||
#define BLOCK_FUNCTION(bl) (bl)->function
|
||
#define BLOCK_SUPERBLOCK(bl) (bl)->superblock
|
||
#define BLOCK_GCC_COMPILED(bl) (bl)->gcc_compile_flag
|
||
|
||
/* Nonzero if symbols of block BL should be sorted alphabetically.
|
||
Don't sort a block which corresponds to a function. If we did the
|
||
sorting would have to preserve the order of the symbols for the
|
||
arguments. */
|
||
|
||
#define BLOCK_SHOULD_SORT(bl) ((bl)->nsyms >= 40 && BLOCK_FUNCTION (bl) == NULL)
|
||
|
||
|
||
/* Represent one symbol name; a variable, constant, function or typedef. */
|
||
|
||
/* Different name spaces for symbols. Looking up a symbol specifies a
|
||
namespace and ignores symbol definitions in other name spaces. */
|
||
|
||
enum namespace
|
||
{
|
||
/* UNDEF_NAMESPACE is used when a namespace has not been discovered or
|
||
none of the following apply. This usually indicates an error either
|
||
in the symbol information or in gdb's handling of symbols. */
|
||
|
||
UNDEF_NAMESPACE,
|
||
|
||
/* VAR_NAMESPACE is the usual namespace. In C, this contains variables,
|
||
function names, typedef names and enum type values. */
|
||
|
||
VAR_NAMESPACE,
|
||
|
||
/* STRUCT_NAMESPACE is used in C to hold struct, union and enum type names.
|
||
Thus, if `struct foo' is used in a C program, it produces a symbol named
|
||
`foo' in the STRUCT_NAMESPACE. */
|
||
|
||
STRUCT_NAMESPACE,
|
||
|
||
/* LABEL_NAMESPACE may be used for names of labels (for gotos);
|
||
currently it is not used and labels are not recorded at all. */
|
||
|
||
LABEL_NAMESPACE
|
||
};
|
||
|
||
/* An address-class says where to find the value of a symbol. */
|
||
|
||
enum address_class
|
||
{
|
||
/* Not used; catches errors */
|
||
|
||
LOC_UNDEF,
|
||
|
||
/* Value is constant int SYMBOL_VALUE, host byteorder */
|
||
|
||
LOC_CONST,
|
||
|
||
/* Value is at fixed address SYMBOL_VALUE_ADDRESS */
|
||
|
||
LOC_STATIC,
|
||
|
||
/* Value is in register. SYMBOL_VALUE is the register number. */
|
||
|
||
LOC_REGISTER,
|
||
|
||
/* It's an argument; the value is at SYMBOL_VALUE offset in arglist. */
|
||
|
||
LOC_ARG,
|
||
|
||
/* Value address is at SYMBOL_VALUE offset in arglist. */
|
||
|
||
LOC_REF_ARG,
|
||
|
||
/* Value is in register number SYMBOL_VALUE. Just like LOC_REGISTER
|
||
except this is an argument. Probably the cleaner way to handle
|
||
this would be to separate address_class (which would include
|
||
separate ARG and LOCAL to deal with FRAME_ARGS_ADDRESS versus
|
||
FRAME_LOCALS_ADDRESS), and an is_argument flag.
|
||
|
||
For some symbol formats (stabs, for some compilers at least),
|
||
the compiler generates two symbols, an argument and a register.
|
||
In some cases we combine them to a single LOC_REGPARM in symbol
|
||
reading, but currently not for all cases (e.g. it's passed on the
|
||
stack and then loaded into a register). */
|
||
|
||
LOC_REGPARM,
|
||
|
||
/* Value is in specified register. Just like LOC_REGPARM except the
|
||
register holds the address of the argument instead of the argument
|
||
itself. This is currently used for the passing of structs and unions
|
||
on sparc and hppa. It is also used for call by reference where the
|
||
address is in a register, at least by mipsread.c. */
|
||
|
||
LOC_REGPARM_ADDR,
|
||
|
||
/* Value is a local variable at SYMBOL_VALUE offset in stack frame. */
|
||
|
||
LOC_LOCAL,
|
||
|
||
/* Value not used; definition in SYMBOL_TYPE. Symbols in the namespace
|
||
STRUCT_NAMESPACE all have this class. */
|
||
|
||
LOC_TYPEDEF,
|
||
|
||
/* Value is address SYMBOL_VALUE_ADDRESS in the code */
|
||
|
||
LOC_LABEL,
|
||
|
||
/* In a symbol table, value is SYMBOL_BLOCK_VALUE of a `struct block'.
|
||
In a partial symbol table, SYMBOL_VALUE_ADDRESS is the start address
|
||
of the block. Function names have this class. */
|
||
|
||
LOC_BLOCK,
|
||
|
||
/* Value is a constant byte-sequence pointed to by SYMBOL_VALUE_BYTES, in
|
||
target byte order. */
|
||
|
||
LOC_CONST_BYTES,
|
||
|
||
/* Value is arg at SYMBOL_VALUE offset in stack frame. Differs from
|
||
LOC_LOCAL in that symbol is an argument; differs from LOC_ARG in
|
||
that we find it in the frame (FRAME_LOCALS_ADDRESS), not in the
|
||
arglist (FRAME_ARGS_ADDRESS). Added for i960, which passes args
|
||
in regs then copies to frame. */
|
||
|
||
LOC_LOCAL_ARG,
|
||
|
||
/* Value is at SYMBOL_VALUE offset from the current value of
|
||
register number SYMBOL_BASEREG. This exists mainly for the same
|
||
things that LOC_LOCAL and LOC_ARG do; but we need to do this
|
||
instead because on 88k DWARF gives us the offset from the
|
||
frame/stack pointer, rather than the offset from the "canonical
|
||
frame address" used by COFF, stabs, etc., and we don't know how
|
||
to convert between these until we start examining prologues.
|
||
|
||
Note that LOC_BASEREG is much less general than a DWARF expression.
|
||
We don't need the generality (at least not yet), and storing a general
|
||
DWARF expression would presumably take up more space than the existing
|
||
scheme. */
|
||
|
||
LOC_BASEREG,
|
||
|
||
/* Same as LOC_BASEREG but it is an argument. */
|
||
|
||
LOC_BASEREG_ARG,
|
||
|
||
/* The variable does not actually exist in the program.
|
||
The value is ignored. */
|
||
|
||
LOC_OPTIMIZED_OUT
|
||
};
|
||
|
||
struct symbol
|
||
{
|
||
|
||
/* The general symbol info required for all types of symbols. */
|
||
|
||
struct general_symbol_info ginfo;
|
||
|
||
/* Name space code. */
|
||
|
||
enum namespace namespace;
|
||
|
||
/* Address class */
|
||
|
||
enum address_class class;
|
||
|
||
/* Data type of value */
|
||
|
||
struct type *type;
|
||
|
||
/* Line number of definition. FIXME: Should we really make the assumption
|
||
that nobody will try to debug files longer than 64K lines? What about
|
||
machine generated programs? */
|
||
|
||
unsigned short line;
|
||
|
||
/* Some symbols require an additional value to be recorded on a per-
|
||
symbol basis. Stash those values here. */
|
||
|
||
union
|
||
{
|
||
/* Used by LOC_BASEREG and LOC_BASEREG_ARG. */
|
||
short basereg;
|
||
}
|
||
aux_value;
|
||
|
||
};
|
||
|
||
#define SYMBOL_NAMESPACE(symbol) (symbol)->namespace
|
||
#define SYMBOL_CLASS(symbol) (symbol)->class
|
||
#define SYMBOL_TYPE(symbol) (symbol)->type
|
||
#define SYMBOL_LINE(symbol) (symbol)->line
|
||
#define SYMBOL_BASEREG(symbol) (symbol)->aux_value.basereg
|
||
|
||
/* A partial_symbol records the name, namespace, and address class of
|
||
symbols whose types we have not parsed yet. For functions, it also
|
||
contains their memory address, so we can find them from a PC value.
|
||
Each partial_symbol sits in a partial_symtab, all of which are chained
|
||
on a partial symtab list and which points to the corresponding
|
||
normal symtab once the partial_symtab has been referenced. */
|
||
|
||
struct partial_symbol
|
||
{
|
||
|
||
/* The general symbol info required for all types of symbols. */
|
||
|
||
struct general_symbol_info ginfo;
|
||
|
||
/* Name space code. */
|
||
|
||
enum namespace namespace;
|
||
|
||
/* Address class (for info_symbols) */
|
||
|
||
enum address_class class;
|
||
|
||
};
|
||
|
||
#define PSYMBOL_NAMESPACE(psymbol) (psymbol)->namespace
|
||
#define PSYMBOL_CLASS(psymbol) (psymbol)->class
|
||
|
||
|
||
/* Source-file information. This describes the relation between source files,
|
||
ine numbers and addresses in the program text. */
|
||
|
||
struct sourcevector
|
||
{
|
||
int length; /* Number of source files described */
|
||
struct source *source[1]; /* Descriptions of the files */
|
||
};
|
||
|
||
/* Each item represents a line-->pc (or the reverse) mapping. This is
|
||
somewhat more wasteful of space than one might wish, but since only
|
||
the files which are actually debugged are read in to core, we don't
|
||
waste much space. */
|
||
|
||
struct linetable_entry
|
||
{
|
||
int line;
|
||
CORE_ADDR pc;
|
||
};
|
||
|
||
/* The order of entries in the linetable is significant. They should
|
||
be sorted by increasing values of the pc field. If there is more than
|
||
one entry for a given pc, then I'm not sure what should happen (and
|
||
I not sure whether we currently handle it the best way).
|
||
|
||
Example: a C for statement generally looks like this
|
||
|
||
10 0x100 - for the init/test part of a for stmt.
|
||
20 0x200
|
||
30 0x300
|
||
10 0x400 - for the increment part of a for stmt.
|
||
|
||
*/
|
||
|
||
struct linetable
|
||
{
|
||
int nitems;
|
||
|
||
/* Actually NITEMS elements. If you don't like this use of the
|
||
`struct hack', you can shove it up your ANSI (seriously, if the
|
||
committee tells us how to do it, we can probably go along). */
|
||
struct linetable_entry item[1];
|
||
};
|
||
|
||
/* All the information on one source file. */
|
||
|
||
struct source
|
||
{
|
||
char *name; /* Name of file */
|
||
struct linetable contents;
|
||
};
|
||
|
||
/* How to relocate the symbols from each section in a symbol file.
|
||
Each struct contains an array of offsets.
|
||
The ordering and meaning of the offsets is file-type-dependent;
|
||
typically it is indexed by section numbers or symbol types or
|
||
something like that.
|
||
|
||
To give us flexibility in changing the internal representation
|
||
of these offsets, the ANOFFSET macro must be used to insert and
|
||
extract offset values in the struct. */
|
||
|
||
struct section_offsets
|
||
{
|
||
CORE_ADDR offsets[1]; /* As many as needed. */
|
||
};
|
||
|
||
#define ANOFFSET(secoff, whichone) (secoff->offsets[whichone])
|
||
|
||
/* Each source file is represented by a struct symtab.
|
||
These objects are chained through the `next' field. */
|
||
|
||
struct symtab
|
||
{
|
||
|
||
/* Chain of all existing symtabs. */
|
||
|
||
struct symtab *next;
|
||
|
||
/* List of all symbol scope blocks for this symtab. */
|
||
|
||
struct blockvector *blockvector;
|
||
|
||
/* Table mapping core addresses to line numbers for this file.
|
||
Can be NULL if none. */
|
||
|
||
struct linetable *linetable;
|
||
|
||
/* Section in objfile->section_offsets for the blockvector and
|
||
the linetable. */
|
||
|
||
int block_line_section;
|
||
|
||
/* If several symtabs share a blockvector, exactly one of them
|
||
should be designed the primary, so that the blockvector
|
||
is relocated exactly once by objfile_relocate. */
|
||
|
||
int primary;
|
||
|
||
/* Name of this source file. */
|
||
|
||
char *filename;
|
||
|
||
/* Directory in which it was compiled, or NULL if we don't know. */
|
||
|
||
char *dirname;
|
||
|
||
/* This component says how to free the data we point to:
|
||
free_contents => do a tree walk and free each object.
|
||
free_nothing => do nothing; some other symtab will free
|
||
the data this one uses.
|
||
free_linetable => free just the linetable. */
|
||
|
||
enum free_code
|
||
{
|
||
free_nothing, free_contents, free_linetable
|
||
}
|
||
free_code;
|
||
|
||
/* Pointer to one block of storage to be freed, if nonzero. */
|
||
/* This is IN ADDITION to the action indicated by free_code. */
|
||
|
||
char *free_ptr;
|
||
|
||
/* Total number of lines found in source file. */
|
||
|
||
int nlines;
|
||
|
||
/* line_charpos[N] is the position of the (N-1)th line of the
|
||
source file. "position" means something we can lseek() to; it
|
||
is not guaranteed to be useful any other way. */
|
||
|
||
int *line_charpos;
|
||
|
||
/* Language of this source file. */
|
||
|
||
enum language language;
|
||
|
||
/* String of version information. May be zero. */
|
||
|
||
char *version;
|
||
|
||
/* Full name of file as found by searching the source path.
|
||
NULL if not yet known. */
|
||
|
||
char *fullname;
|
||
|
||
/* Object file from which this symbol information was read. */
|
||
|
||
struct objfile *objfile;
|
||
|
||
/* Anything extra for this symtab. This is for target machines
|
||
with special debugging info of some sort (which cannot just
|
||
be represented in a normal symtab). */
|
||
|
||
#if defined (EXTRA_SYMTAB_INFO)
|
||
EXTRA_SYMTAB_INFO
|
||
#endif
|
||
|
||
};
|
||
|
||
#define BLOCKVECTOR(symtab) (symtab)->blockvector
|
||
#define LINETABLE(symtab) (symtab)->linetable
|
||
|
||
|
||
/* Each source file that has not been fully read in is represented by
|
||
a partial_symtab. This contains the information on where in the
|
||
executable the debugging symbols for a specific file are, and a
|
||
list of names of global symbols which are located in this file.
|
||
They are all chained on partial symtab lists.
|
||
|
||
Even after the source file has been read into a symtab, the
|
||
partial_symtab remains around. They are allocated on an obstack,
|
||
psymbol_obstack. FIXME, this is bad for dynamic linking or VxWorks-
|
||
style execution of a bunch of .o's. */
|
||
|
||
struct partial_symtab
|
||
{
|
||
|
||
/* Chain of all existing partial symtabs. */
|
||
|
||
struct partial_symtab *next;
|
||
|
||
/* Name of the source file which this partial_symtab defines */
|
||
|
||
char *filename;
|
||
|
||
/* Information about the object file from which symbols should be read. */
|
||
|
||
struct objfile *objfile;
|
||
|
||
/* Set of relocation offsets to apply to each section. */
|
||
|
||
struct section_offsets *section_offsets;
|
||
|
||
/* Range of text addresses covered by this file; texthigh is the
|
||
beginning of the next section. */
|
||
|
||
CORE_ADDR textlow;
|
||
CORE_ADDR texthigh;
|
||
|
||
/* Array of pointers to all of the partial_symtab's which this one
|
||
depends on. Since this array can only be set to previous or
|
||
the current (?) psymtab, this dependency tree is guaranteed not
|
||
to have any loops. "depends on" means that symbols must be read
|
||
for the dependencies before being read for this psymtab; this is
|
||
for type references in stabs, where if foo.c includes foo.h, declarations
|
||
in foo.h may use type numbers defined in foo.c. For other debugging
|
||
formats there may be no need to use dependencies. */
|
||
|
||
struct partial_symtab **dependencies;
|
||
|
||
int number_of_dependencies;
|
||
|
||
/* Global symbol list. This list will be sorted after readin to
|
||
improve access. Binary search will be the usual method of
|
||
finding a symbol within it. globals_offset is an integer offset
|
||
within global_psymbols[]. */
|
||
|
||
int globals_offset;
|
||
int n_global_syms;
|
||
|
||
/* Static symbol list. This list will *not* be sorted after readin;
|
||
to find a symbol in it, exhaustive search must be used. This is
|
||
reasonable because searches through this list will eventually
|
||
lead to either the read in of a files symbols for real (assumed
|
||
to take a *lot* of time; check) or an error (and we don't care
|
||
how long errors take). This is an offset and size within
|
||
static_psymbols[]. */
|
||
|
||
int statics_offset;
|
||
int n_static_syms;
|
||
|
||
/* Pointer to symtab eventually allocated for this source file, 0 if
|
||
!readin or if we haven't looked for the symtab after it was readin. */
|
||
|
||
struct symtab *symtab;
|
||
|
||
/* Pointer to function which will read in the symtab corresponding to
|
||
this psymtab. */
|
||
|
||
void (*read_symtab) PARAMS ((struct partial_symtab *));
|
||
|
||
/* Information that lets read_symtab() locate the part of the symbol table
|
||
that this psymtab corresponds to. This information is private to the
|
||
format-dependent symbol reading routines. For further detail examine
|
||
the various symbol reading modules. Should really be (void *) but is
|
||
(char *) as with other such gdb variables. (FIXME) */
|
||
|
||
char *read_symtab_private;
|
||
|
||
/* Non-zero if the symtab corresponding to this psymtab has been readin */
|
||
|
||
unsigned char readin;
|
||
};
|
||
|
||
/* A fast way to get from a psymtab to its symtab (after the first time). */
|
||
#define PSYMTAB_TO_SYMTAB(pst) \
|
||
((pst) -> symtab != NULL ? (pst) -> symtab : psymtab_to_symtab (pst))
|
||
|
||
|
||
/* The virtual function table is now an array of structures which have the
|
||
form { int16 offset, delta; void *pfn; }.
|
||
|
||
In normal virtual function tables, OFFSET is unused.
|
||
DELTA is the amount which is added to the apparent object's base
|
||
address in order to point to the actual object to which the
|
||
virtual function should be applied.
|
||
PFN is a pointer to the virtual function.
|
||
|
||
Note that this macro is g++ specific (FIXME). */
|
||
|
||
#define VTBL_FNADDR_OFFSET 2
|
||
|
||
/* Macro that yields non-zero value iff NAME is the prefix for C++ operator
|
||
names. If you leave out the parenthesis here you will lose!
|
||
Currently 'o' 'p' CPLUS_MARKER is used for both the symbol in the
|
||
symbol-file and the names in gdb's symbol table.
|
||
Note that this macro is g++ specific (FIXME). */
|
||
|
||
#define OPNAME_PREFIX_P(NAME) \
|
||
((NAME)[0] == 'o' && (NAME)[1] == 'p' && (NAME)[2] == CPLUS_MARKER)
|
||
|
||
/* Macro that yields non-zero value iff NAME is the prefix for C++ vtbl
|
||
names. Note that this macro is g++ specific (FIXME). */
|
||
|
||
#define VTBL_PREFIX_P(NAME) \
|
||
((NAME)[3] == CPLUS_MARKER && !strncmp ((NAME), "_vt", 3))
|
||
|
||
/* Macro that yields non-zero value iff NAME is the prefix for C++ destructor
|
||
names. Note that this macro is g++ specific (FIXME). */
|
||
|
||
#define DESTRUCTOR_PREFIX_P(NAME) \
|
||
((NAME)[0] == '_' && (NAME)[1] == CPLUS_MARKER && (NAME)[2] == '_')
|
||
|
||
|
||
/* External variables and functions for the objects described above. */
|
||
|
||
/* This symtab variable specifies the current file for printing source lines */
|
||
|
||
extern struct symtab *current_source_symtab;
|
||
|
||
/* This is the next line to print for listing source lines. */
|
||
|
||
extern int current_source_line;
|
||
|
||
/* See the comment in symfile.c about how current_objfile is used. */
|
||
|
||
extern struct objfile *current_objfile;
|
||
|
||
extern struct symtab *
|
||
lookup_symtab PARAMS ((char *));
|
||
|
||
extern struct symbol *
|
||
lookup_symbol PARAMS ((const char *, const struct block *,
|
||
const enum namespace, int *, struct symtab **));
|
||
|
||
extern struct symbol *
|
||
lookup_block_symbol PARAMS ((const struct block *, const char *,
|
||
const enum namespace));
|
||
|
||
extern struct type *
|
||
lookup_struct PARAMS ((char *, struct block *));
|
||
|
||
extern struct type *
|
||
lookup_union PARAMS ((char *, struct block *));
|
||
|
||
extern struct type *
|
||
lookup_enum PARAMS ((char *, struct block *));
|
||
|
||
extern struct symbol *
|
||
block_function PARAMS ((struct block *));
|
||
|
||
extern struct symbol *
|
||
find_pc_function PARAMS ((CORE_ADDR));
|
||
|
||
extern int find_pc_partial_function
|
||
PARAMS ((CORE_ADDR, char **, CORE_ADDR *, CORE_ADDR *));
|
||
|
||
extern void
|
||
clear_pc_function_cache PARAMS ((void));
|
||
|
||
extern struct partial_symtab *
|
||
lookup_partial_symtab PARAMS ((char *));
|
||
|
||
extern struct partial_symtab *
|
||
find_pc_psymtab PARAMS ((CORE_ADDR));
|
||
|
||
extern struct symtab *
|
||
find_pc_symtab PARAMS ((CORE_ADDR));
|
||
|
||
extern struct partial_symbol *
|
||
find_pc_psymbol PARAMS ((struct partial_symtab *, CORE_ADDR));
|
||
|
||
extern int
|
||
find_pc_line_pc_range PARAMS ((CORE_ADDR, CORE_ADDR *, CORE_ADDR *));
|
||
|
||
extern int
|
||
contained_in PARAMS ((struct block *, struct block *));
|
||
|
||
extern void
|
||
reread_symbols PARAMS ((void));
|
||
|
||
/* Functions for dealing with the minimal symbol table, really a misc
|
||
address<->symbol mapping for things we don't have debug symbols for. */
|
||
|
||
extern void
|
||
prim_record_minimal_symbol PARAMS ((const char *, CORE_ADDR,
|
||
enum minimal_symbol_type));
|
||
|
||
extern void
|
||
prim_record_minimal_symbol_and_info PARAMS ((const char *, CORE_ADDR,
|
||
enum minimal_symbol_type,
|
||
char *info, int section));
|
||
|
||
extern struct minimal_symbol *
|
||
lookup_minimal_symbol PARAMS ((const char *, struct objfile *));
|
||
|
||
extern struct minimal_symbol *
|
||
lookup_minimal_symbol_by_pc PARAMS ((CORE_ADDR));
|
||
|
||
extern void
|
||
init_minimal_symbol_collection PARAMS ((void));
|
||
|
||
extern void
|
||
discard_minimal_symbols PARAMS ((int));
|
||
|
||
extern void
|
||
install_minimal_symbols PARAMS ((struct objfile *));
|
||
|
||
struct symtab_and_line
|
||
{
|
||
struct symtab *symtab;
|
||
|
||
/* Line number. Line numbers start at 1 and proceed through symtab->nlines.
|
||
0 is never a valid line number; it is used to indicate that line number
|
||
information is not available. */
|
||
int line;
|
||
|
||
CORE_ADDR pc;
|
||
CORE_ADDR end;
|
||
};
|
||
|
||
struct symtabs_and_lines
|
||
{
|
||
struct symtab_and_line *sals;
|
||
int nelts;
|
||
};
|
||
|
||
/* Given a pc value, return line number it is in. Second arg nonzero means
|
||
if pc is on the boundary use the previous statement's line number. */
|
||
|
||
extern struct symtab_and_line
|
||
find_pc_line PARAMS ((CORE_ADDR, int));
|
||
|
||
/* Given a symtab and line number, return the pc there. */
|
||
|
||
extern CORE_ADDR
|
||
find_line_pc PARAMS ((struct symtab *, int));
|
||
|
||
extern int
|
||
find_line_pc_range PARAMS ((struct symtab *, int, CORE_ADDR *, CORE_ADDR *));
|
||
|
||
extern void
|
||
resolve_sal_pc PARAMS ((struct symtab_and_line *));
|
||
|
||
/* Given a string, return the line specified by it. For commands like "list"
|
||
and "breakpoint". */
|
||
|
||
extern struct symtabs_and_lines
|
||
decode_line_spec PARAMS ((char *, int));
|
||
|
||
extern struct symtabs_and_lines
|
||
decode_line_spec_1 PARAMS ((char *, int));
|
||
|
||
extern struct symtabs_and_lines
|
||
decode_line_1 PARAMS ((char **, int, struct symtab *, int, char ***));
|
||
|
||
/* Symmisc.c */
|
||
|
||
#if MAINTENANCE_CMDS
|
||
|
||
void
|
||
maintenance_print_symbols PARAMS ((char *, int));
|
||
|
||
void
|
||
maintenance_print_psymbols PARAMS ((char *, int));
|
||
|
||
void
|
||
maintenance_print_msymbols PARAMS ((char *, int));
|
||
|
||
void
|
||
maintenance_print_objfiles PARAMS ((char *, int));
|
||
|
||
#endif
|
||
|
||
extern void
|
||
free_symtab PARAMS ((struct symtab *));
|
||
|
||
/* Symbol-reading stuff in symfile.c and solib.c. */
|
||
|
||
extern struct symtab *
|
||
psymtab_to_symtab PARAMS ((struct partial_symtab *));
|
||
|
||
extern void
|
||
clear_solib PARAMS ((void));
|
||
|
||
extern struct objfile *
|
||
symbol_file_add PARAMS ((char *, int, CORE_ADDR, int, int, int));
|
||
|
||
/* source.c */
|
||
|
||
extern int frame_file_full_name; /* in stack.c */
|
||
|
||
extern int
|
||
identify_source_line PARAMS ((struct symtab *, int, int, CORE_ADDR));
|
||
|
||
extern void
|
||
print_source_lines PARAMS ((struct symtab *, int, int, int));
|
||
|
||
extern void
|
||
forget_cached_source_info PARAMS ((void));
|
||
|
||
extern void
|
||
select_source_symtab PARAMS ((struct symtab *));
|
||
|
||
extern char **make_symbol_completion_list PARAMS ((char *, char *));
|
||
|
||
/* symtab.c */
|
||
|
||
extern struct partial_symtab *
|
||
find_main_psymtab PARAMS ((void));
|
||
|
||
/* blockframe.c */
|
||
|
||
extern struct blockvector *
|
||
blockvector_for_pc PARAMS ((CORE_ADDR, int *));
|
||
|
||
/* symfile.c */
|
||
|
||
extern void
|
||
clear_symtab_users PARAMS ((void));
|
||
|
||
extern enum language
|
||
deduce_language_from_filename PARAMS ((char *));
|
||
|
||
#endif /* !defined(SYMTAB_H) */
|