/* Symbol table definitions for GDB.
- Copyright (C) 1986, 1989, 1991, 1992 Free Software Foundation, Inc.
+ Copyright 1986, 1989, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
This file is part of GDB.
#define obstack_chunk_alloc xmalloc
#define obstack_chunk_free free
+/* Don't do this; it means that if some .o's are compiled with GNU C
+ and some are not (easy to do accidentally the way we configure
+ things; also it is a pain to have to "make clean" every time you
+ want to switch compilers), then GDB dies a horrible death. */
+/* GNU C supports enums that are bitfields. Some compilers don't. */
+#if 0 && defined(__GNUC__) && !defined(BYTE_BITFIELD)
+#define BYTE_BITFIELD :8;
+#else
+#define BYTE_BITFIELD /*nothing*/
+#endif
+
/* Define a structure for the information that is common to all symbol types,
- including minimal symbols, partial symbols, and full symbols. */
+ 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.
+
+ These fields are ordered to encourage good packing, since we frequently
+ have tens or hundreds of thousands of these. */
struct general_symbol_info
{
char *name;
- /* 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).
-
- 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. */
+ /* 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
{
- /* for LOC_CONST, LOC_REGISTER, LOC_ARG, LOC_REF_ARG, LOC_REGPARM,
- LOC_LOCAL */
-
- long value;
-
- /* for LOC_BLOCK */
+ /* The fact that this is a long not a LONGEST mainly limits the
+ range of a LOC_CONST. Since LOC_CONST_BYTES exists, I'm not
+ sure that is a big deal. */
+ long ivalue;
struct block *block;
- /* for LOC_CONST_BYTES */
-
char *bytes;
- /* for LOC_STATIC, LOC_LABEL */
-
CORE_ADDR address;
/* for opaque typedef struct chain */
}
value;
- /* In a multilanguage environment, some language specific information may
- need to be recorded along with each symbol. */
+ /* Since one and only one language can apply, wrap the language specific
+ information inside a union. */
- struct language_dependent_info
+ union
{
+ struct cplus_specific /* For C++ */
+ {
+ char *demangled_name;
+ } cplus_specific;
+ struct chill_specific /* For Chill */
+ {
+ char *demangled_name;
+ } chill_specific;
+ } language_specific;
- /* Record the language that this information applies to. */
+ /* Record the source code language that applies to this symbol.
+ This is used to select one of the fields from the language specific
+ union above. */
- enum language language;
+ enum language language BYTE_BITFIELD;
- /* Since one and only one language can apply, wrap the information inside
- a union. */
+ /* 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 (the ELF code
+ also tries to set it correctly). */
- union
- {
- /* For C++ */
- struct
- {
- char *demangled_name;
- } cplus_specific;
- } lang_u;
- } lang_specific;
+ short section;
};
#define SYMBOL_NAME(symbol) (symbol)->ginfo.name
-#define SYMBOL_VALUE(symbol) (symbol)->ginfo.value.value
+#define SYMBOL_VALUE(symbol) (symbol)->ginfo.value.ivalue
#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.lang_specific.language
-#define SYMBOL_DEMANGLED_NAME(symbol) \
- (symbol)->ginfo.lang_specific.lang_u.cplus_specific.demangled_name
+#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. */
+ symbol name. The result should never be NULL. */
-#define SYMBOL_SOURCE_NAME(symbol) \
- ((demangle && (SYMBOL_LANGUAGE(symbol) == language_cplus) && \
- (SYMBOL_DEMANGLED_NAME(symbol) != NULL)) ? \
- SYMBOL_DEMANGLED_NAME (symbol) : SYMBOL_NAME (symbol))
+#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. */
+ 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_LANGUAGE(symbol) == language_cplus) &&\
- (SYMBOL_DEMANGLED_NAME(symbol) != NULL)) ? \
- SYMBOL_DEMANGLED_NAME (symbol) : SYMBOL_NAME (symbol))
+#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
"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_LANGUAGE (symbol) == language_cplus && \
- SYMBOL_DEMANGLED_NAME (symbol) != NULL && \
- strcmp_iw (SYMBOL_DEMANGLED_NAME (symbol), (name)) == 0))
+#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_LANGUAGE (symbol) == language_cplus && \
- SYMBOL_DEMANGLED_NAME (symbol) != NULL && \
- re_exec (SYMBOL_DEMANGLED_NAME (symbol)) != 0))
+#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
struct minimal_symbol
{
- /* The general symbol info required for all types of symbols. */
+ /* 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;
mst_text, /* Generally executable instructions */
mst_data, /* Generally initialized data */
mst_bss, /* Generally uninitialized data */
- mst_abs /* Generally absolute (nonrelocatable) */
- } type;
+ mst_abs, /* Generally absolute (nonrelocatable) */
+ /* GDB uses mst_solib_trampoline for the start address of a shared
+ library trampoline entry. Breakpoints for shared library functions
+ are put there if the shared library is not yet loaded.
+ After the shared library is loaded, lookup_minimal_symbol will
+ prefer the minimal symbol from the shared library (usually
+ a mst_text symbol) over the mst_solib_trampoline symbol, and the
+ breakpoints will be moved to their true address in the shared
+ library via breakpoint_re_set. */
+ mst_solib_trampoline, /* Shared library trampoline code */
+ /* 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 BYTE_BITFIELD;
};
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
{
- /* 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. */
+ /* 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.
- 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. */
+ /* 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 outputs the special blocks at the
- very end, after the other blocks. */
+
+ 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 function 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;
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];
};
#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. */
+/* 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)
+#define BLOCK_SHOULD_SORT(bl) ((bl)->nsyms >= 40 && BLOCK_FUNCTION (bl) == NULL)
\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. */
LOC_STATIC,
- /* Value is in register */
+ /* Value is in register. SYMBOL_VALUE is the register number. */
LOC_REGISTER,
- /* Value is at spec'd offset in arglist */
+ /* It's an argument; the value is at SYMBOL_VALUE offset in arglist. */
LOC_ARG,
- /* Value address is at spec'd offset in arglist. */
+ /* Value address is at SYMBOL_VALUE offset in arglist. */
LOC_REF_ARG,
- /* Value is at spec'd offset in register window */
+ /* 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 at spec'd offset in stack frame */
+ /* 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,
LOC_LABEL,
- /* Value is address SYMBOL_VALUE_BLOCK of a `struct block'. Function names
- have this class. */
+ /* 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_ADDRESS, in
+ /* Value is a constant byte-sequence pointed to by SYMBOL_VALUE_BYTES, in
target byte order. */
LOC_CONST_BYTES,
- /* 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. */
+ /* 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.
- LOC_LOCAL_ARG
+ 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
struct general_symbol_info ginfo;
- /* Name space code. */
+ /* Data type of value */
- enum namespace namespace;
+ struct type *type;
- /* Address class */
+ /* Name space code. */
- enum address_class class;
+ enum namespace namespace BYTE_BITFIELD;
- /* Data type of value */
+ /* Address class */
- struct type *type;
+ enum address_class class BYTE_BITFIELD;
/* Line number of definition. FIXME: Should we really make the assumption
that nobody will try to debug files longer than 64K lines? What about
union
{
- /* for OP_BASEREG in DWARF location specs */
- struct
- {
- short regno_valid; /* 0 == regno invalid; !0 == regno valid */
- short regno; /* base register number {0, 1, 2, ...} */
- } basereg;
+ /* 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.regno
-
-/* This currently fails because some symbols are not being initialized
- to zero on allocation, and no code is currently setting this value.
- Basereg handling will probably change significantly in the next release.
- FIXME -fnf */
-
-#if 0
-#define SYMBOL_BASEREG_VALID(symbol) (symbol)->aux_value.basereg.regno_valid
-#else
-#define SYMBOL_BASEREG_VALID(symbol) 0
-#endif
-
+#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
/* Name space code. */
- enum namespace namespace;
+ enum namespace namespace BYTE_BITFIELD;
/* Address class (for info_symbols) */
- enum address_class class;
+ enum address_class class BYTE_BITFIELD;
};
/* 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];
};
#define ANOFFSET(secoff, whichone) (secoff->offsets[whichone])
-/* Each source file is represented by a struct symtab.
+/* Each source file or header is represented by a struct symtab.
These objects are chained through the `next' field. */
struct symtab
struct symtab *next;
- /* List of all symbol scope blocks for this symtab. */
+ /* List of all symbol scope blocks for this symtab. May be shared
+ between different symtabs (and normally is for all the symtabs
+ in a given compilation unit). */
struct blockvector *blockvector;
/* Table mapping core addresses to line numbers for this file.
- Can be NULL if none. */
+ Can be NULL if none. Never shared between different symtabs. */
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;
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. */
+ free_linetable => free just the linetable. FIXME: Is this redundant
+ with the primary field? */
enum free_code
{
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;
/* 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;
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!
Currently 'o' 'p' CPLUS_MARKER is used for both the symbol in the
- symbol-file and the names in gdb's symbol table. */
+ 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] == '_')
+
\f
/* External variables and functions for the objects described above. */
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));
+/* Macro for name of symbol to indicate a file compiled with gcc. */
+#ifndef GCC_COMPILED_FLAG_SYMBOL
+#define GCC_COMPILED_FLAG_SYMBOL "gcc_compiled."
+#endif
+
+/* Macro for name of symbol to indicate a file compiled with gcc2. */
+#ifndef GCC2_COMPILED_FLAG_SYMBOL
+#define GCC2_COMPILED_FLAG_SYMBOL "gcc2_compiled."
+#endif
+
/* 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 PARAMS ((const char *, CORE_ADDR,
+ enum minimal_symbol_type,
+ struct objfile *));
-extern void
-prim_record_minimal_symbol_and_info PARAMS ((const char *, CORE_ADDR,
- enum minimal_symbol_type,
- char *info));
+extern void prim_record_minimal_symbol_and_info
+ PARAMS ((const char *, CORE_ADDR,
+ enum minimal_symbol_type,
+ char *info, int section,
+ struct objfile *));
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 struct minimal_symbol *
+lookup_solib_trampoline_symbol_by_pc PARAMS ((CORE_ADDR));
+
+extern CORE_ADDR
+find_solib_trampoline_target 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;
};
extern struct symtab_and_line
find_pc_line PARAMS ((CORE_ADDR, int));
+/* Given an address, return the nearest symbol at or below it in memory.
+ Optionally return the symtab it's from through 2nd arg, and the
+ address in inferior memory of the symbol through 3rd arg. */
+
+extern struct symbol *
+find_addr_symbol PARAMS ((CORE_ADDR, struct symtab **, CORE_ADDR *));
+
/* 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 *));
+find_line_pc_range PARAMS ((struct symtab_and_line,
+ CORE_ADDR *, CORE_ADDR *));
extern void
resolve_sal_pc PARAMS ((struct symtab_and_line *));
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 */
void
maintenance_print_objfiles PARAMS ((char *, int));
+void
+maintenance_check_symtabs PARAMS ((char *, int));
+
#endif
extern void
/* 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 */
-extern void
-clear_symtab_users_once PARAMS ((void));
-
extern struct partial_symtab *
find_main_psymtab PARAMS ((void));
/* symfile.c */
+extern void
+clear_symtab_users PARAMS ((void));
+
extern enum language
deduce_language_from_filename PARAMS ((char *));
projects / deliverable / binutils-gdb.git / blobdiff