#if !defined (SYMTAB_H)
#define SYMTAB_H 1
-#include "obstack.h"
-
-/* See the comment in symfile.c about how current_objfile is used. */
-
-extern struct objfile *current_objfile;
/* Some definitions and declarations to go with use of obstacks. */
+
+#include "obstack.h"
#define obstack_chunk_alloc xmalloc
#define obstack_chunk_free free
-/* Some macros for char-based bitfields. */
-#define B_SET(a,x) (a[x>>3] |= (1 << (x&7)))
-#define B_CLR(a,x) (a[x>>3] &= ~(1 << (x&7)))
-#define B_TST(a,x) (a[x>>3] & (1 << (x&7)))
-#define B_TYPE unsigned char
-#define B_BYTES(x) ( 1 + ((x)>>3) )
-#define B_CLRALL(a,x) bzero (a, B_BYTES(x))
+/* 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) \
+ (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
+ asm_demangle is off. Otherwise if asm_demangle is on it is the "demangled"
+ form. In other languages this is just the symbol name. The result should
+ never be NULL. */
+
+#define SYMBOL_LINKAGE_NAME(symbol) \
+ (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 two
- required pieces of information are the symbol's name and the address
- associated with that symbol. 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. */
+ 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
{
- /* Name of the symbol. This is a required field. Storage for the name is
- allocated on the symbol_obstack for the associated objfile. */
-
- char *name;
+ /* The general symbol info required for all types of symbols.
- /* Address of the symbol. This is a required field. */
+ The SYMBOL_VALUE_ADDRESS contains the address that this symbol
+ corresponds to. */
- CORE_ADDR address;
+ 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
mst_text, /* Generally executable instructions */
mst_data, /* Generally initialized data */
mst_bss, /* Generally uninitialized data */
- mst_abs /* Generally absolute (nonrelocatable) */
+ 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
+
\f
/* All of the name-scope contours of the program
are represented by `struct block' objects.
Each block represents one name scope.
Each lexical context has its own block.
- The first two blocks in the blockvector are special.
- The first one contains all the symbols defined in this compilation
+ 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 second one contains all the symbols whose scope is the
+ The STATIC_BLOCK contains all the symbols whose scope is the
entire compilation excluding other separate compilations.
- In C, these correspond to global symbols and static symbols.
+ 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 first two special blocks
+ 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.
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 GLOBAL_BLOCK 0
+#define STATIC_BLOCK 1
#define FIRST_LOCAL_BLOCK 2
struct block
{
- /* Addresses in the executable code that are in this block.
- Note: in an unrelocated symbol segment in a file,
- these are always zero. They can be filled in from the
- N_LBRAC and N_RBRAC symbols in the loader symbol table. */
- CORE_ADDR startaddr, endaddr;
- /* The symbol that names this block,
- if the block is the body of a function;
- otherwise, zero.
- Note: In an unrelocated symbol segment in an object file,
- this field may be zero even when the block has a name.
- That is because the block is output before the name
- (since the name resides in a higher block).
- Since the symbol does point to the block (as its value),
- it is possible to find the block and set its name properly. */
+
+ /* 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. */
- /* Note that in an unrelocated symbol segment in an object file
- this pointer may be zero when the correct value should be
- the second special block (for symbols whose scope is one compilation).
- This is because the compiler ouptuts the special blocks at the
- very end, after the other blocks. */
+
+ /* 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;
- /* A flag indicating whether or not the fucntion corresponding
- to this block was compiled with gcc or not. If there is no
- function corresponding to this block, this meaning of this flag
- is undefined. (In practice it will be 1 if the block was created
- while processing a file compiled with gcc and 0 when not). */
+
+ /* 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. */
+
+ /* 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];
};
-\f
-/* 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.
+#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
- VAR_NAMESPACE is the usual namespace.
- In C, this contains variables, function names, typedef names
- and enum type values.
+/* 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. */
- 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.
+#define BLOCK_SHOULD_SORT(bl) ((bl)->nsyms >= 40 && BLOCK_FUNCTION (bl) == NULL)
- LABEL_NAMESPACE may be used for names of labels (for gotos);
- currently it is not used and labels are not recorded at all. */
+\f
+/* Represent one symbol name; a variable, constant, function or typedef. */
-/* For a non-global symbol allocated statically,
- the correct core address cannot be determined by the compiler.
- The compiler puts an index number into the symbol's value field.
- This index number can be matched with the "desc" field of
- an entry in the loader symbol table. */
+/* Different name spaces for symbols. Looking up a symbol specifies a
+ namespace and ignores symbol definitions in other name spaces. */
enum namespace
{
- UNDEF_NAMESPACE, VAR_NAMESPACE, STRUCT_NAMESPACE, LABEL_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
{
- LOC_UNDEF, /* Not used; catches errors */
- LOC_CONST, /* Value is constant int SYMBOL_VALUE, host byteorder */
- LOC_STATIC, /* Value is at fixed address SYMBOL_VALUE_ADDRESS */
- LOC_REGISTER, /* Value is in register */
- LOC_ARG, /* Value is at spec'd offset in arglist */
- LOC_REF_ARG, /* Value address is at spec'd offset in arglist. */
- LOC_REGPARM, /* Value is at spec'd offset in register window */
- LOC_LOCAL, /* Value is at spec'd offset in stack frame */
- LOC_TYPEDEF, /* Value not used; definition in SYMBOL_TYPE
- Symbols in the namespace STRUCT_NAMESPACE
- all have this class. */
- LOC_LABEL, /* Value is address SYMBOL_VALUE_ADDRESS in the code */
- LOC_BLOCK, /* Value is address SYMBOL_VALUE_BLOCK of a
- `struct block'. Function names have this class. */
- LOC_CONST_BYTES, /* Value is a constant byte-sequence pointed to by
- SYMBOL_VALUE_ADDRESS, in target byte order. */
- LOC_LOCAL_ARG /* Value is arg at spec'd 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. */
+ /* 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
{
- /* Symbol name */
- char *name;
+
+ /* 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. */
+ /* 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;
- /* constant value, or address if static, or register number,
- or offset in arguments, or offset in stack frame. All of
- these are in host byte order (though what they point to might
- be in target byte order, e.g. LOC_CONST_BYTES). */
+ /* Some symbols require an additional value to be recorded on a per-
+ symbol basis. Stash those values here. */
+
union
{
- long value; /* for LOC_CONST, LOC_REGISTER, LOC_ARG,
- LOC_REF_ARG, LOC_REGPARM, LOC_LOCAL */
- struct block *block; /* for LOC_BLOCK */
- char *bytes; /* for LOC_CONST_BYTES */
- CORE_ADDR address; /* for LOC_STATIC, LOC_LABEL */
- struct symbol *chain; /* for opaque typedef struct chain */
+ /* Used by LOC_BASEREG and LOC_BASEREG_ARG. */
+ short basereg;
}
- value;
-};
+ 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
+\f
/* 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.
struct partial_symbol
{
- /* Symbol name */
- char *name;
+
+ /* 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;
- /* Value (only used for static functions currently). Done this
- way so that we can use the struct symbol macros.
- Note that the address of a function is SYMBOL_VALUE_ADDRESS (pst)
- in a partial symbol table, but BLOCK_START (SYMBOL_BLOCK_VALUE (st))
- in a symbol table. */
- union
- {
- long value;
- CORE_ADDR address;
- }
- value;
+
};
+
+#define PSYMBOL_NAMESPACE(psymbol) (psymbol)->namespace
+#define PSYMBOL_CLASS(psymbol) (psymbol)->class
+
\f
-/* Source-file information.
- This describes the relation between source files and line numbers
- and addresses in the program text. */
+/* Source-file information. This describes the relation between source files,
+ ine numbers and addresses in the program text. */
struct sourcevector
{
/* 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.
-
- Each item used to be an int; either minus a line number, or a
- program counter. If it represents a line number, that is the line
- described by the next program counter value. If it is positive, it
- is the program counter at which the code for the next line starts. */
+ waste much space. */
struct linetable_entry
{
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];
};
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;
+ 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;
- /* Array mapping line number to character position. */
+
+ /* 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.
- 0 if not yet known. */
+ 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
+
+\f
/* 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
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;
- /* Address relative to which the symbols in this file are. Need to
- relocate by this amount when reading in symbols from the symbol
- file. */
- CORE_ADDR addr;
+ /* 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, texthigh;
+
+ 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. */
+ 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, n_global_syms;
+
+ 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
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, n_static_syms;
+
+ 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 */
+
+ /* 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? \
- (pst)->symtab: \
- psymtab_to_symtab (pst) )
+#define PSYMTAB_TO_SYMTAB(pst) \
+ ((pst) -> symtab != NULL ? (pst) -> symtab : psymtab_to_symtab (pst))
-/* This symtab variable specifies the current file for printing source lines */
-
-struct symtab *current_source_symtab;
-
-/* This is the next line to print for listing source lines. */
-
-int current_source_line;
-
-#define BLOCKVECTOR(symtab) (symtab)->blockvector
-
-#define LINETABLE(symtab) (symtab)->linetable
\f
-/* Macros normally used to access components of symbol table structures. */
-
-#define BLOCKVECTOR_NBLOCKS(blocklist) (blocklist)->nblocks
-#define BLOCKVECTOR_BLOCK(blocklist,n) (blocklist)->block[n]
-
-#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. */
-#define BLOCK_SHOULD_SORT(bl) ((bl)->nsyms >= 40)
-
-#define SYMBOL_NAME(symbol) (symbol)->name
-#define SYMBOL_NAMESPACE(symbol) (symbol)->namespace
-#define SYMBOL_CLASS(symbol) (symbol)->class
-#define SYMBOL_VALUE(symbol) (symbol)->value.value
-#define SYMBOL_VALUE_ADDRESS(symbol) (symbol)->value.address
-#define SYMBOL_VALUE_BYTES(symbol) (symbol)->value.bytes
-#define SYMBOL_BLOCK_VALUE(symbol) (symbol)->value.block
-#define SYMBOL_VALUE_CHAIN(symbol) (symbol)->value.chain
-#define SYMBOL_TYPE(symbol) (symbol)->type
-#define SYMBOL_LINE(symbol) (symbol)->line
-
-/* The virtual function table is now an array of structures
- which have the form { int16 offset, delta; void *pfn; }.
+/* 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. */
+ 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!
-
+/* 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. */
-#define OPNAME_PREFIX_P(NAME) ((NAME)[0] == 'o' && (NAME)[1] == 'p' \
- && (NAME)[2] == CPLUS_MARKER)
+ 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] == '_')
-#define VTBL_PREFIX_P(NAME) ((NAME)[3] == CPLUS_MARKER \
- && !strncmp ((NAME), "_vt", 3))
\f
-/* Functions that work on the objects described above */
+/* 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 *
find_pc_function PARAMS ((CORE_ADDR));
-extern int
-find_pc_partial_function PARAMS ((CORE_ADDR, char **, 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 void
reread_symbols PARAMS ((void));
-extern int
-have_partial_symbols PARAMS ((void));
-
-extern int
-have_full_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 int
-have_minimal_symbols PARAMS ((void));
-
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 PTR
-iterate_over_msymbols PARAMS ((PTR (*func) (struct objfile *,
- struct minimal_symbol *,
- PTR, PTR, PTR),
- PTR, PTR, PTR));
+extern struct minimal_symbol *lookup_next_minimal_symbol PARAMS ((CORE_ADDR));
extern void
init_minimal_symbol_collection PARAMS ((void));
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;
};
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. */
+/* 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));
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". */
+/* 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));
decode_line_spec_1 PARAMS ((char *, int));
extern struct symtabs_and_lines
-decode_line_1 PARAMS ((char **, int, struct symtab *, int));
+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 *));
/* source.c */
+extern int frame_file_full_name; /* in stack.c */
+
extern int
-identify_source_line PARAMS ((struct symtab *, int, int));
+identify_source_line PARAMS ((struct symtab *, int, int, CORE_ADDR));
extern void
print_source_lines PARAMS ((struct symtab *, int, int, int));
extern void
select_source_symtab PARAMS ((struct symtab *));
-extern char **
-make_symbol_completion_list PARAMS ((char *));
+extern char **make_symbol_completion_list PARAMS ((char *, char *));
/* symtab.c */
/* symfile.c */
+extern void
+clear_symtab_users PARAMS ((void));
+
extern enum language
deduce_language_from_filename PARAMS ((char *));