/* DWARF debugging format support for GDB.
- Copyright (C) 1991 Free Software Foundation, Inc.
- Written by Fred Fish at Cygnus Support, portions based on dbxread.c,
+ Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1998
+ Free Software Foundation, Inc.
+ Written by Fred Fish at Cygnus Support. Portions based on dbxread.c,
mipsread.c, coffread.c, and dwarfread.c from a Data General SVR4 gdb port.
-This file is part of GDB.
+ 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 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.
+ 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. */
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/*
-FIXME: Figure out how to get the frame pointer register number in the
-execution environment of the target. Remove R_FP kludge
-
-FIXME: Add generation of dependencies list to partial symtab code.
-
-FIXME: Currently we ignore host/target byte ordering and integer size
-differences. Should remap data from external form to an internal form
-before trying to use it.
-
-FIXME: Resolve minor differences between what information we put in the
-partial symbol table and what dbxread puts in. For example, we don't yet
-put enum constants there. And dbxread seems to invent a lot of typedefs
-we never see. Use the new printpsym command to see the partial symbol table
-contents.
-
-FIXME: Change forward declarations of static functions to allow for compilers
-without prototypes.
-
-FIXME: Figure out a better way to tell gdb (all the debug reading routines)
-the names of the gccX_compiled flags.
-
-FIXME: Figure out a better way to tell gdb about the name of the function
-contain the user's entry point (I.E. main())
-
-FIXME: The current DWARF specification has a very strong bias towards
-machines with 32-bit integers, as it assumes that many attributes of the
-program (such as an address) will fit in such an integer. There are many
-references in the spec to things that are 2, 4, or 8 bytes long. Given that
-we will probably run into problems on machines where some of these assumptions
-are invalid (64-bit ints for example), we don't bother at this time to try to
-make this code more flexible and just use shorts, ints, and longs (and their
-sizes) where it seems appropriate. I.E. we use a short int to hold DWARF
-tags, and assume that the tag size in the file is the same as sizeof(short).
-
-FIXME: Figure out how to get the name of the symbol indicating that a module
-has been compiled with gcc (gcc_compiledXX) in a more portable way than
-hardcoding it into the object file readers.
-
-FIXME: See other FIXME's and "ifdef 0" scattered throughout the code for
-other things to work on, if you get bored. :-)
-
-*/
-#include <stdio.h>
-#ifdef __STDC__
-#include <stdarg.h>
-#else
-#include <varargs.h>
-#endif
-#include <fcntl.h>
+ FIXME: Do we need to generate dependencies in partial symtabs?
+ (Perhaps we don't need to).
+
+ FIXME: Resolve minor differences between what information we put in the
+ partial symbol table and what dbxread puts in. For example, we don't yet
+ put enum constants there. And dbxread seems to invent a lot of typedefs
+ we never see. Use the new printpsym command to see the partial symbol table
+ contents.
+
+ FIXME: Figure out a better way to tell gdb about the name of the function
+ contain the user's entry point (I.E. main())
+
+ FIXME: See other FIXME's and "ifdef 0" scattered throughout the code for
+ other things to work on, if you get bored. :-)
+
+ */
#include "defs.h"
-#include "bfd.h"
#include "symtab.h"
+#include "gdbtypes.h"
#include "symfile.h"
+#include "objfiles.h"
#include "elf/dwarf.h"
-#include "ansidecl.h"
+#include "buildsym.h"
+#include "demangle.h"
+#include "expression.h" /* Needed for enum exp_opcode in language.h, sigh... */
+#include "language.h"
+#include "complaints.h"
+
+#include <fcntl.h>
+#include "gdb_string.h"
+
+/* Some macros to provide DIE info for complaints. */
+
+#define DIE_ID (curdie!=NULL ? curdie->die_ref : 0)
+#define DIE_NAME (curdie!=NULL && curdie->at_name!=NULL) ? curdie->at_name : ""
+
+/* Complaints that can be issued during DWARF debug info reading. */
+
+struct complaint no_bfd_get_N =
+{
+ "DIE @ 0x%x \"%s\", no bfd support for %d byte data object", 0, 0
+};
+
+struct complaint malformed_die =
+{
+ "DIE @ 0x%x \"%s\", malformed DIE, bad length (%d bytes)", 0, 0
+};
+
+struct complaint bad_die_ref =
+{
+ "DIE @ 0x%x \"%s\", reference to DIE (0x%x) outside compilation unit", 0, 0
+};
+
+struct complaint unknown_attribute_form =
+{
+ "DIE @ 0x%x \"%s\", unknown attribute form (0x%x)", 0, 0
+};
+
+struct complaint unknown_attribute_length =
+{
+ "DIE @ 0x%x \"%s\", unknown attribute length, skipped remaining attributes", 0, 0
+};
+
+struct complaint unexpected_fund_type =
+{
+ "DIE @ 0x%x \"%s\", unexpected fundamental type 0x%x", 0, 0
+};
+
+struct complaint unknown_type_modifier =
+{
+ "DIE @ 0x%x \"%s\", unknown type modifier %u", 0, 0
+};
+
+struct complaint volatile_ignored =
+{
+ "DIE @ 0x%x \"%s\", type modifier 'volatile' ignored", 0, 0
+};
+
+struct complaint const_ignored =
+{
+ "DIE @ 0x%x \"%s\", type modifier 'const' ignored", 0, 0
+};
+
+struct complaint botched_modified_type =
+{
+ "DIE @ 0x%x \"%s\", botched modified type decoding (mtype 0x%x)", 0, 0
+};
+
+struct complaint op_deref2 =
+{
+ "DIE @ 0x%x \"%s\", OP_DEREF2 address 0x%x not handled", 0, 0
+};
+
+struct complaint op_deref4 =
+{
+ "DIE @ 0x%x \"%s\", OP_DEREF4 address 0x%x not handled", 0, 0
+};
+
+struct complaint basereg_not_handled =
+{
+ "DIE @ 0x%x \"%s\", BASEREG %d not handled", 0, 0
+};
+
+struct complaint dup_user_type_allocation =
+{
+ "DIE @ 0x%x \"%s\", internal error: duplicate user type allocation", 0, 0
+};
+
+struct complaint dup_user_type_definition =
+{
+ "DIE @ 0x%x \"%s\", internal error: duplicate user type definition", 0, 0
+};
+
+struct complaint missing_tag =
+{
+ "DIE @ 0x%x \"%s\", missing class, structure, or union tag", 0, 0
+};
+
+struct complaint bad_array_element_type =
+{
+ "DIE @ 0x%x \"%s\", bad array element type attribute 0x%x", 0, 0
+};
+
+struct complaint subscript_data_items =
+{
+ "DIE @ 0x%x \"%s\", can't decode subscript data items", 0, 0
+};
+
+struct complaint unhandled_array_subscript_format =
+{
+ "DIE @ 0x%x \"%s\", array subscript format 0x%x not handled yet", 0, 0
+};
+
+struct complaint unknown_array_subscript_format =
+{
+ "DIE @ 0x%x \"%s\", unknown array subscript format %x", 0, 0
+};
+
+struct complaint not_row_major =
+{
+ "DIE @ 0x%x \"%s\", array not row major; not handled correctly", 0, 0
+};
+
+struct complaint missing_at_name =
+{
+ "DIE @ 0x%x, AT_name tag missing", 0, 0
+};
+
+typedef unsigned int DIE_REF; /* Reference to a DIE */
+
+#ifndef GCC_PRODUCER
+#define GCC_PRODUCER "GNU C "
+#endif
-#ifdef MAINTENANCE /* Define to 1 to compile in some maintenance stuff */
-#define SQUAWK(stuff) dwarfwarn stuff
-#else
-#define SQUAWK(stuff)
+#ifndef GPLUS_PRODUCER
+#define GPLUS_PRODUCER "GNU C++ "
#endif
-#ifndef R_FP /* FIXME */
-#define R_FP 14 /* Kludge to get frame pointer register number */
+#ifndef LCC_PRODUCER
+#define LCC_PRODUCER "NCR C/C++"
#endif
-typedef unsigned int DIEREF; /* Reference to a DIE */
+#ifndef CHILL_PRODUCER
+#define CHILL_PRODUCER "GNU Chill "
+#endif
-#define GCC_COMPILED_FLAG_SYMBOL "gcc_compiled%" /* FIXME */
-#define GCC2_COMPILED_FLAG_SYMBOL "gcc2_compiled%" /* FIXME */
+/* Provide a default mapping from a DWARF register number to a gdb REGNUM. */
+#ifndef DWARF_REG_TO_REGNUM
+#define DWARF_REG_TO_REGNUM(num) (num)
+#endif
-#define STREQ(a,b) (strcmp(a,b)==0)
+/* Flags to target_to_host() that tell whether or not the data object is
+ expected to be signed. Used, for example, when fetching a signed
+ integer in the target environment which is used as a signed integer
+ in the host environment, and the two environments have different sized
+ ints. In this case, *somebody* has to sign extend the smaller sized
+ int. */
+
+#define GET_UNSIGNED 0 /* No sign extension required */
+#define GET_SIGNED 1 /* Sign extension required */
+
+/* Defines for things which are specified in the document "DWARF Debugging
+ Information Format" published by UNIX International, Programming Languages
+ SIG. These defines are based on revision 1.0.0, Jan 20, 1992. */
+
+#define SIZEOF_DIE_LENGTH 4
+#define SIZEOF_DIE_TAG 2
+#define SIZEOF_ATTRIBUTE 2
+#define SIZEOF_FORMAT_SPECIFIER 1
+#define SIZEOF_FMT_FT 2
+#define SIZEOF_LINETBL_LENGTH 4
+#define SIZEOF_LINETBL_LINENO 4
+#define SIZEOF_LINETBL_STMT 2
+#define SIZEOF_LINETBL_DELTA 4
+#define SIZEOF_LOC_ATOM_CODE 1
+
+#define FORM_FROM_ATTR(attr) ((attr) & 0xF) /* Implicitly specified */
+
+/* Macros that return the sizes of various types of data in the target
+ environment.
+
+ FIXME: Currently these are just compile time constants (as they are in
+ other parts of gdb as well). They need to be able to get the right size
+ either from the bfd or possibly from the DWARF info. It would be nice if
+ the DWARF producer inserted DIES that describe the fundamental types in
+ the target environment into the DWARF info, similar to the way dbx stabs
+ producers produce information about their fundamental types. */
+
+#define TARGET_FT_POINTER_SIZE(objfile) (TARGET_PTR_BIT / TARGET_CHAR_BIT)
+#define TARGET_FT_LONG_SIZE(objfile) (TARGET_LONG_BIT / TARGET_CHAR_BIT)
/* The Amiga SVR4 header file <dwarf.h> defines AT_element_list as a
FORM_BLOCK2, and this is the value emitted by the AT&T compiler.
/* External variables referenced. */
-extern CORE_ADDR startup_file_start; /* From blockframe.c */
-extern CORE_ADDR startup_file_end; /* From blockframe.c */
-extern CORE_ADDR entry_scope_lowpc; /* From blockframe.c */
-extern CORE_ADDR entry_scope_highpc; /* From blockframc.c */
-extern CORE_ADDR main_scope_lowpc; /* From blockframe.c */
-extern CORE_ADDR main_scope_highpc; /* From blockframc.c */
-extern int info_verbose; /* From main.c; nonzero => verbose */
-
+extern int info_verbose; /* From main.c; nonzero => verbose */
+extern char *warning_pre_print; /* From utils.c */
/* The DWARF debugging information consists of two major pieces,
one is a block of DWARF Information Entries (DIE's) and the other
the information for a single DIE, the one currently being processed.
In order to make it easier to randomly access the attribute fields
- of the current DIE, which are specifically unordered within the DIE
+ of the current DIE, which are specifically unordered within the DIE,
each DIE is scanned and an instance of the "struct dieinfo"
structure is initialized.
we may want to test for the presence of some attributes in the DIE,
such as AT_low_pc, without restricting the values of the field,
we need someway to note that we found such an attribute.
-
+
*/
-
+
typedef char BLOCK;
-struct dieinfo {
- char * die; /* Pointer to the raw DIE data */
- long dielength; /* Length of the raw DIE data */
- DIEREF dieref; /* Offset of this DIE */
- short dietag; /* Tag for this DIE */
- long at_padding;
- long at_sibling;
- BLOCK * at_location;
- char * at_name;
- unsigned short at_fund_type;
- BLOCK * at_mod_fund_type;
- long at_user_def_type;
- BLOCK * at_mod_u_d_type;
- short at_ordering;
- BLOCK * at_subscr_data;
- long at_byte_size;
- short at_bit_offset;
- long at_bit_size;
- BLOCK * at_element_list;
- long at_stmt_list;
- long at_low_pc;
- long at_high_pc;
- long at_language;
- long at_member;
- long at_discr;
- BLOCK * at_discr_value;
- short at_visibility;
- long at_import;
- BLOCK * at_string_length;
- char * at_comp_dir;
- char * at_producer;
- long at_frame_base;
- long at_start_scope;
- long at_stride_size;
- long at_src_info;
- short at_prototyped;
- unsigned int has_at_low_pc:1;
- unsigned int has_at_stmt_list:1;
- unsigned int short_element_list:1;
-};
+struct dieinfo
+ {
+ char *die; /* Pointer to the raw DIE data */
+ unsigned long die_length; /* Length of the raw DIE data */
+ DIE_REF die_ref; /* Offset of this DIE */
+ unsigned short die_tag; /* Tag for this DIE */
+ unsigned long at_padding;
+ unsigned long at_sibling;
+ BLOCK *at_location;
+ char *at_name;
+ unsigned short at_fund_type;
+ BLOCK *at_mod_fund_type;
+ unsigned long at_user_def_type;
+ BLOCK *at_mod_u_d_type;
+ unsigned short at_ordering;
+ BLOCK *at_subscr_data;
+ unsigned long at_byte_size;
+ unsigned short at_bit_offset;
+ unsigned long at_bit_size;
+ BLOCK *at_element_list;
+ unsigned long at_stmt_list;
+ CORE_ADDR at_low_pc;
+ CORE_ADDR at_high_pc;
+ unsigned long at_language;
+ unsigned long at_member;
+ unsigned long at_discr;
+ BLOCK *at_discr_value;
+ BLOCK *at_string_length;
+ char *at_comp_dir;
+ char *at_producer;
+ unsigned long at_start_scope;
+ unsigned long at_stride_size;
+ unsigned long at_src_info;
+ char *at_prototyped;
+ unsigned int has_at_low_pc:1;
+ unsigned int has_at_stmt_list:1;
+ unsigned int has_at_byte_size:1;
+ unsigned int short_element_list:1;
+
+ /* Kludge to identify register variables */
+
+ unsigned int isreg;
+
+ /* Kludge to identify optimized out variables */
+
+ unsigned int optimized_out;
+
+ /* Kludge to identify basereg references.
+ Nonzero if we have an offset relative to a basereg. */
+
+ unsigned int offreg;
+
+ /* Kludge to identify which base register is it relative to. */
+
+ unsigned int basereg;
+ };
-static int diecount; /* Approximate count of dies for compilation unit */
+static int diecount; /* Approximate count of dies for compilation unit */
static struct dieinfo *curdie; /* For warnings and such */
-static char *dbbase; /* Base pointer to dwarf info */
-static int dbroff; /* Relative offset from start of .debug section */
-static char *lnbase; /* Base pointer to line section */
-static int isreg; /* Kludge to identify register variables */
+static char *dbbase; /* Base pointer to dwarf info */
+static int dbsize; /* Size of dwarf info in bytes */
+static int dbroff; /* Relative offset from start of .debug section */
+static char *lnbase; /* Base pointer to line section */
+/* This value is added to each symbol value. FIXME: Generalize to
+ the section_offsets structure used by dbxread (once this is done,
+ pass the appropriate section number to end_symtab). */
static CORE_ADDR baseaddr; /* Add to each symbol value */
-/* Each partial symbol table entry contains a pointer to private data for the
- read_symtab() function to use when expanding a partial symbol table entry
- to a full symbol table entry. For DWARF debugging info, this data is
- contained in the following structure and macros are provided for easy
- access to the members given a pointer to a partial symbol table entry.
-
- dbfoff Always the absolute file offset to the start of the ".debug"
- section for the file containing the DIE's being accessed.
-
- dbroff Relative offset from the start of the ".debug" access to the
- first DIE to be accessed. When building the partial symbol
- table, this value will be zero since we are accessing the
- entire ".debug" section. When expanding a partial symbol
- table entry, this value will be the offset to the first
- DIE for the compilation unit containing the symbol that
- triggers the expansion.
-
- dblength The size of the chunk of DIE's being examined, in bytes.
-
- lnfoff The absolute file offset to the line table fragment. Ignored
- when building partial symbol tables, but used when expanding
- them, and contains the absolute file offset to the fragment
- of the ".line" section containing the line numbers for the
- current compilation unit.
- */
-
-struct dwfinfo {
- int dbfoff; /* Absolute file offset to start of .debug section */
- int dbroff; /* Relative offset from start of .debug section */
- int dblength; /* Size of the chunk of DIE's being examined */
- int lnfoff; /* Absolute file offset to line table fragment */
-};
+/* The section offsets used in the current psymtab or symtab. FIXME,
+ only used to pass one value (baseaddr) at the moment. */
+static struct section_offsets *base_section_offsets;
+
+/* We put a pointer to this structure in the read_symtab_private field
+ of the psymtab. */
+
+struct dwfinfo
+ {
+ /* Always the absolute file offset to the start of the ".debug"
+ section for the file containing the DIE's being accessed. */
+ file_ptr dbfoff;
+ /* Relative offset from the start of the ".debug" section to the
+ first DIE to be accessed. When building the partial symbol
+ table, this value will be zero since we are accessing the
+ entire ".debug" section. When expanding a partial symbol
+ table entry, this value will be the offset to the first
+ DIE for the compilation unit containing the symbol that
+ triggers the expansion. */
+ int dbroff;
+ /* The size of the chunk of DIE's being examined, in bytes. */
+ int dblength;
+ /* The absolute file offset to the line table fragment. Ignored
+ when building partial symbol tables, but used when expanding
+ them, and contains the absolute file offset to the fragment
+ of the ".line" section containing the line numbers for the
+ current compilation unit. */
+ file_ptr lnfoff;
+ };
#define DBFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbfoff)
#define DBROFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbroff)
#define DBLENGTH(p) (((struct dwfinfo *)((p)->read_symtab_private))->dblength)
#define LNFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->lnfoff)
-/* Record the symbols defined for each context in a linked list. We don't
- create a struct block for the context until we know how long to make it.
- Global symbols for each file are maintained in the global_symbols list. */
+/* The generic symbol table building routines have separate lists for
+ file scope symbols and all all other scopes (local scopes). So
+ we need to select the right one to pass to add_symbol_to_list().
+ We do it by keeping a pointer to the correct list in list_in_scope.
-struct pending_symbol {
- struct pending_symbol *next; /* Next pending symbol */
- struct symbol *symbol; /* The actual symbol */
-};
-
-static struct pending_symbol *global_symbols; /* global funcs and vars */
-static struct block *global_symbol_block;
-
-/* Line number entries are read into a dynamically expandable vector before
- being added to the symbol table section. Once we know how many there are
- we can add them. */
-
-static struct linetable *line_vector; /* Vector of line numbers. */
-static int line_vector_index; /* Index of next entry. */
-static int line_vector_length; /* Current allocation limit */
-
-/* Scope information is kept in a scope tree, one node per scope. Each time
- a new scope is started, a child node is created under the current node
- and set to the current scope. Each time a scope is closed, the current
- scope moves back up the tree to the parent of the current scope.
-
- Each scope contains a pointer to the list of symbols defined in the scope,
- a pointer to the block vector for the scope, a pointer to the symbol
- that names the scope (if any), and the range of PC values that mark
- the start and end of the scope. */
-
-struct scopenode {
- struct scopenode *parent;
- struct scopenode *child;
- struct scopenode *sibling;
- struct pending_symbol *symbols;
- struct block *block;
- struct symbol *namesym;
- CORE_ADDR lowpc;
- CORE_ADDR highpc;
-};
+ FIXME: The original dwarf code just treated the file scope as the first
+ local scope, and all other local scopes as nested local scopes, and worked
+ fine. Check to see if we really need to distinguish these in buildsym.c */
-static struct scopenode *scopetree;
-static struct scopenode *scope;
+struct pending **list_in_scope = &file_symbols;
/* DIES which have user defined types or modified user defined types refer to
other DIES for the type information. Thus we need to associate the offset
we can divide any DIE offset by 4 to obtain a unique index into this fixed
size array. Since each element is a 4 byte pointer, it takes exactly as
much memory to hold this array as to hold the DWARF info for a given
- compilation unit. But it gets freed as soon as we are done with it. */
+ compilation unit. But it gets freed as soon as we are done with it.
+ This has worked well in practice, as a reasonable tradeoff between memory
+ consumption and speed, without having to resort to much more complicated
+ algorithms. */
static struct type **utypes; /* Pointer to array of user type pointers */
static int numutypes; /* Max number of user type pointers */
+/* Maintain an array of referenced fundamental types for the current
+ compilation unit being read. For DWARF version 1, we have to construct
+ the fundamental types on the fly, since no information about the
+ fundamental types is supplied. Each such fundamental type is created by
+ calling a language dependent routine to create the type, and then a
+ pointer to that type is then placed in the array at the index specified
+ by it's FT_<TYPENAME> value. The array has a fixed size set by the
+ FT_NUM_MEMBERS compile time constant, which is the number of predefined
+ fundamental types gdb knows how to construct. */
+
+static struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */
+
+/* Record the language for the compilation unit which is currently being
+ processed. We know it once we have seen the TAG_compile_unit DIE,
+ and we need it while processing the DIE's for that compilation unit.
+ It is eventually saved in the symtab structure, but we don't finalize
+ the symtab struct until we have processed all the DIE's for the
+ compilation unit. We also need to get and save a pointer to the
+ language struct for this language, so we can call the language
+ dependent routines for doing things such as creating fundamental
+ types. */
+
+static enum language cu_language;
+static const struct language_defn *cu_language_defn;
+
/* Forward declarations of static functions so we don't have to worry
- about ordering within this file. The EXFUN macro may be slightly
- misleading. Should probably be called DCLFUN instead, or something
- more intuitive, since it can be used for both static and external
- definitions. */
+ about ordering within this file. */
static void
-EXFUN (dwarfwarn, (char *fmt DOTS));
+free_utypes PARAMS ((PTR));
-static void
-EXFUN (scan_partial_symbols, (char *thisdie AND char *enddie));
+static int
+attribute_size PARAMS ((unsigned int));
+
+static CORE_ADDR
+ target_to_host PARAMS ((char *, int, int, struct objfile *));
static void
-EXFUN (scan_compilation_units,
- (char *filename AND CORE_ADDR addr AND char *thisdie AND char *enddie
- AND unsigned int dbfoff AND unsigned int lnoffset
- AND struct objfile *objfile));
-
-static struct partial_symtab *
-EXFUN(start_psymtab, (struct objfile *objfile AND CORE_ADDR addr
- AND char *filename AND CORE_ADDR textlow
- AND CORE_ADDR texthigh AND int dbfoff
- AND int curoff AND int culength AND int lnfoff
- AND struct partial_symbol *global_syms
- AND struct partial_symbol *static_syms));
-static void
-EXFUN(add_partial_symbol, (struct dieinfo *dip));
+add_enum_psymbol PARAMS ((struct dieinfo *, struct objfile *));
-#ifdef DEBUG
static void
-DEFUN(add_psymbol_to_list,
- (listp, name, space, class, value),
- struct psymbol_allocation_list *listp AND
- char *name AND
- enum namespace space AND
- enum address_class class AND
- CORE_ADDR value)
-{
- ADD_PSYMBOL_VT_TO_LIST(name, strlen(name), space, class,
- listp, value, SYMBOL_VALUE);
-}
-#else
-#define add_psymbol_to_list(listp, name, space, class, value) \
- ADD_PSYMBOL_VT_TO_LIST(name, strlen(name), space, class, \
- *(listp), value, SYMBOL_VALUE)
-#endif
+handle_producer PARAMS ((char *));
static void
-EXFUN(init_psymbol_list, (int total_symbols));
+read_file_scope PARAMS ((struct dieinfo *, char *, char *, struct objfile *));
static void
-EXFUN(basicdieinfo, (struct dieinfo *dip AND char *diep));
+read_func_scope PARAMS ((struct dieinfo *, char *, char *, struct objfile *));
static void
-EXFUN(completedieinfo, (struct dieinfo *dip));
+read_lexical_block_scope PARAMS ((struct dieinfo *, char *, char *,
+ struct objfile *));
static void
-EXFUN(dwarf_psymtab_to_symtab, (struct partial_symtab *pst));
+scan_partial_symbols PARAMS ((char *, char *, struct objfile *));
static void
-EXFUN(psymtab_to_symtab_1, (struct partial_symtab *pst));
+scan_compilation_units PARAMS ((char *, char *, file_ptr,
+ file_ptr, struct objfile *));
-static struct symtab *
-EXFUN(read_ofile_symtab, (struct partial_symtab *pst));
+static void
+add_partial_symbol PARAMS ((struct dieinfo *, struct objfile *));
static void
-EXFUN(process_dies,
- (char *thisdie AND char *enddie AND struct objfile *objfile));
+basicdieinfo PARAMS ((struct dieinfo *, char *, struct objfile *));
static void
-EXFUN(read_structure_scope,
- (struct dieinfo *dip AND char *thisdie AND char *enddie AND
- struct objfile *objfile));
+completedieinfo PARAMS ((struct dieinfo *, struct objfile *));
-static struct type *
-EXFUN(decode_array_element_type, (char *scan AND char *end));
+static void
+dwarf_psymtab_to_symtab PARAMS ((struct partial_symtab *));
-static struct type *
-EXFUN(decode_subscr_data, (char *scan AND char *end));
+static void
+psymtab_to_symtab_1 PARAMS ((struct partial_symtab *));
static void
-EXFUN(read_array_type, (struct dieinfo *dip));
+read_ofile_symtab PARAMS ((struct partial_symtab *));
static void
-EXFUN(read_subroutine_type,
- (struct dieinfo *dip AND char *thisdie AND char *enddie));
+process_dies PARAMS ((char *, char *, struct objfile *));
static void
-EXFUN(read_enumeration,
- (struct dieinfo *dip AND char *thisdie AND char *enddie));
+read_structure_scope PARAMS ((struct dieinfo *, char *, char *,
+ struct objfile *));
static struct type *
-EXFUN(struct_type,
- (struct dieinfo *dip AND char *thisdie AND char *enddie AND
- struct objfile *objfile));
+ decode_array_element_type PARAMS ((char *));
static struct type *
-EXFUN(enum_type, (struct dieinfo *dip));
+ decode_subscript_data_item PARAMS ((char *, char *));
static void
-EXFUN(start_symtab, (void));
+dwarf_read_array_type PARAMS ((struct dieinfo *));
static void
-EXFUN(end_symtab,
- (char *filename AND long language AND struct objfile *objfile));
-
-static int
-EXFUN(scopecount, (struct scopenode *node));
+read_tag_pointer_type PARAMS ((struct dieinfo * dip));
static void
-EXFUN(openscope,
- (struct symbol *namesym AND CORE_ADDR lowpc AND CORE_ADDR highpc));
+read_tag_string_type PARAMS ((struct dieinfo * dip));
static void
-EXFUN(freescope, (struct scopenode *node));
-
-static struct block *
-EXFUN(buildblock, (struct pending_symbol *syms));
+read_subroutine_type PARAMS ((struct dieinfo *, char *, char *));
static void
-EXFUN(closescope, (void));
+read_enumeration PARAMS ((struct dieinfo *, char *, char *, struct objfile *));
-static void
-EXFUN(record_line, (int line AND CORE_ADDR pc));
+static struct type *
+ struct_type PARAMS ((struct dieinfo *, char *, char *, struct objfile *));
+
+static struct type *
+ enum_type PARAMS ((struct dieinfo *, struct objfile *));
static void
-EXFUN(decode_line_numbers, (char *linetable));
+decode_line_numbers PARAMS ((char *));
static struct type *
-EXFUN(decode_die_type, (struct dieinfo *dip));
+ decode_die_type PARAMS ((struct dieinfo *));
static struct type *
-EXFUN(decode_mod_fund_type, (char *typedata));
+ decode_mod_fund_type PARAMS ((char *));
static struct type *
-EXFUN(decode_mod_u_d_type, (char *typedata));
+ decode_mod_u_d_type PARAMS ((char *));
static struct type *
-EXFUN(decode_modified_type,
- (unsigned char *modifiers AND unsigned short modcount AND int mtype));
+ decode_modified_type PARAMS ((char *, unsigned int, int));
static struct type *
-EXFUN(decode_fund_type, (unsigned short fundtype));
+ decode_fund_type PARAMS ((unsigned int));
static char *
-EXFUN(create_name, (char *name AND struct obstack *obstackp));
-
-static void
-EXFUN(add_symbol_to_list,
- (struct symbol *symbol AND struct pending_symbol **listhead));
-
-static struct block **
-EXFUN(gatherblocks, (struct block **dest AND struct scopenode *node));
-
-static struct blockvector *
-EXFUN(make_blockvector, (void));
+ create_name PARAMS ((char *, struct obstack *));
static struct type *
-EXFUN(lookup_utype, (DIEREF dieref));
+ lookup_utype PARAMS ((DIE_REF));
static struct type *
-EXFUN(alloc_utype, (DIEREF dieref AND struct type *usetype));
+ alloc_utype PARAMS ((DIE_REF, struct type *));
static struct symbol *
-EXFUN(new_symbol, (struct dieinfo *dip));
+ new_symbol PARAMS ((struct dieinfo *, struct objfile *));
+
+static void
+synthesize_typedef PARAMS ((struct dieinfo *, struct objfile *,
+ struct type *));
static int
-EXFUN(locval, (char *loc));
+locval PARAMS ((struct dieinfo *));
static void
-EXFUN(record_misc_function, (char *name AND CORE_ADDR address AND
- enum misc_function_type));
+set_cu_language PARAMS ((struct dieinfo *));
-static int
-EXFUN(compare_psymbols,
- (struct partial_symbol *s1 AND struct partial_symbol *s2));
+static struct type *
+ dwarf_fundamental_type PARAMS ((struct objfile *, int));
/*
-GLOBAL FUNCTION
+ LOCAL FUNCTION
- dwarf_build_psymtabs -- build partial symtabs from DWARF debug info
+ dwarf_fundamental_type -- lookup or create a fundamental type
-SYNOPSIS
+ SYNOPSIS
- void dwarf_build_psymtabs (int desc, char *filename, CORE_ADDR addr,
- int mainline, unsigned int dbfoff, unsigned int dbsize,
- unsigned int lnoffset, unsigned int lnsize,
- struct objfile *objfile)
+ struct type *
+ dwarf_fundamental_type (struct objfile *objfile, int typeid)
-DESCRIPTION
+ DESCRIPTION
- This function is called upon to build partial symtabs from files
- containing DIE's (Dwarf Information Entries) and DWARF line numbers.
+ DWARF version 1 doesn't supply any fundamental type information,
+ so gdb has to construct such types. It has a fixed number of
+ fundamental types that it knows how to construct, which is the
+ union of all types that it knows how to construct for all languages
+ that it knows about. These are enumerated in gdbtypes.h.
- It is passed a file descriptor for an open file containing the DIES
- and line number information, the corresponding filename for that
- file, a base address for relocating the symbols, a flag indicating
- whether or not this debugging information is from a "main symbol
- table" rather than a shared library or dynamically linked file,
- and file offset/size pairs for the DIE information and line number
- information.
+ As an example, assume we find a DIE that references a DWARF
+ fundamental type of FT_integer. We first look in the ftypes
+ array to see if we already have such a type, indexed by the
+ gdb internal value of FT_INTEGER. If so, we simply return a
+ pointer to that type. If not, then we ask an appropriate
+ language dependent routine to create a type FT_INTEGER, using
+ defaults reasonable for the current target machine, and install
+ that type in ftypes for future reference.
-RETURNS
+ RETURNS
- No return value.
+ Pointer to a fundamental type.
*/
-void
-DEFUN(dwarf_build_psymtabs,
- (desc, filename, addr, mainline, dbfoff, dbsize, lnoffset, lnsize,
- objfile),
- int desc AND
- char *filename AND
- CORE_ADDR addr AND
- int mainline AND
- unsigned int dbfoff AND
- unsigned int dbsize AND
- unsigned int lnoffset AND
- unsigned int lnsize AND
- struct objfile *objfile)
+static struct type *
+dwarf_fundamental_type (objfile, typeid)
+ struct objfile *objfile;
+ int typeid;
{
- struct cleanup *back_to;
-
- dbbase = xmalloc (dbsize);
- dbroff = 0;
- if ((lseek (desc, dbfoff, 0) != dbfoff) ||
- (read (desc, dbbase, dbsize) != dbsize))
+ if (typeid < 0 || typeid >= FT_NUM_MEMBERS)
{
- free (dbbase);
- error ("can't read DWARF data from '%s'", filename);
- }
- back_to = make_cleanup (free, dbbase);
-
- /* If we are reinitializing, or if we have never loaded syms yet, init.
- Since we have no idea how many DIES we are looking at, we just guess
- some arbitrary value. */
-
- if (mainline || global_psymbols.size == 0 || static_psymbols.size == 0)
- {
- init_psymbol_list (1024);
+ error ("internal error - invalid fundamental type id %d", typeid);
}
-
- /* From this point on, we don't need to pass mainline around, so zap
- addr to zero if we don't need relocation. */
- if (mainline)
+ /* Look for this particular type in the fundamental type vector. If one is
+ not found, create and install one appropriate for the current language
+ and the current target machine. */
+
+ if (ftypes[typeid] == NULL)
{
- addr = 0;
+ ftypes[typeid] = cu_language_defn->la_fund_type (objfile, typeid);
}
- /* Follow the compilation unit sibling chain, building a partial symbol
- table entry for each one. Save enough information about each compilation
- unit to locate the full DWARF information later. */
-
- scan_compilation_units (filename, addr, dbbase, dbbase + dbsize,
- dbfoff, lnoffset, objfile);
-
- do_cleanups (back_to);
+ return (ftypes[typeid]);
}
-
/*
-LOCAL FUNCTION
-
- record_misc_function -- add entry to miscellaneous function vector
-
-SYNOPSIS
+ LOCAL FUNCTION
- static void record_misc_function (char *name, CORE_ADDR address,
- enum misc_function_type mf_type)
+ set_cu_language -- set local copy of language for compilation unit
-DESCRIPTION
-
- Given a pointer to the name of a symbol that should be added to the
- miscellaneous function vector, and the address associated with that
- symbol, records this information for later use in building the
- miscellaneous function vector.
-
- */
-
-static void
-DEFUN(record_misc_function, (name, address, mf_type),
- char *name AND CORE_ADDR address AND enum misc_function_type mf_type)
-{
- prim_record_misc_function (obsavestring (name, strlen (name)), address,
- mf_type);
-}
+ SYNOPSIS
-/*
-
-LOCAL FUNCTION
-
- dwarfwarn -- issue a DWARF related warning
+ void
+ set_cu_language (struct dieinfo *dip)
-DESCRIPTION
-
- Issue warnings about DWARF related things that aren't serious enough
- to warrant aborting with an error, but should not be ignored either.
- This includes things like detectable corruption in DIE's, missing
- DIE's, unimplemented features, etc.
+ DESCRIPTION
- In general, running across tags or attributes that we don't recognize
- is not considered to be a problem and we should not issue warnings
- about such.
+ Decode the language attribute for a compilation unit DIE and
+ remember what the language was. We use this at various times
+ when processing DIE's for a given compilation unit.
-NOTES
+ RETURNS
- We mostly follow the example of the error() routine, but without
- returning to command level. It is arguable about whether warnings
- should be issued at all, and if so, where they should go (stdout or
- stderr).
+ No return value.
- We assume that curdie is valid and contains at least the basic
- information for the DIE where the problem was noticed.
-*/
+ */
-#ifdef __STDC__
static void
-DEFUN(dwarfwarn, (fmt), char *fmt DOTS)
+set_cu_language (dip)
+ struct dieinfo *dip;
{
- va_list ap;
-
- va_start (ap, fmt);
- warning_setup ();
- fprintf (stderr, "DWARF warning (ref 0x%x): ", curdie -> dieref);
- if (curdie -> at_name)
+ switch (dip->at_language)
{
- fprintf (stderr, "'%s': ", curdie -> at_name);
+ case LANG_C89:
+ case LANG_C:
+ cu_language = language_c;
+ break;
+ case LANG_C_PLUS_PLUS:
+ cu_language = language_cplus;
+ break;
+ case LANG_CHILL:
+ cu_language = language_chill;
+ break;
+ case LANG_MODULA2:
+ cu_language = language_m2;
+ break;
+ case LANG_FORTRAN77:
+ case LANG_FORTRAN90:
+ cu_language = language_fortran;
+ break;
+ case LANG_ADA83:
+ case LANG_COBOL74:
+ case LANG_COBOL85:
+ case LANG_PASCAL83:
+ /* We don't know anything special about these yet. */
+ cu_language = language_unknown;
+ break;
+ default:
+ /* If no at_language, try to deduce one from the filename */
+ cu_language = deduce_language_from_filename (dip->at_name);
+ break;
}
- vfprintf (stderr, fmt, ap);
- fprintf (stderr, "\n");
- fflush (stderr);
- va_end (ap);
+ cu_language_defn = language_def (cu_language);
}
-#else
-static void
-dwarfwarn (va_alist)
- va_dcl
-{
- va_list ap;
- char *fmt;
-
- va_start (ap);
- fmt = va_arg (ap, char *);
- warning_setup ();
- fprintf (stderr, "DWARF warning (ref 0x%x): ", curdie -> dieref);
- if (curdie -> at_name)
- {
- fprintf (stderr, "'%s': ", curdie -> at_name);
- }
- vfprintf (stderr, fmt, ap);
- fprintf (stderr, "\n");
- fflush (stderr);
- va_end (ap);
-}
-#endif
/*
-LOCAL FUNCTION
+ GLOBAL FUNCTION
- compare_psymbols -- compare two partial symbols by name
+ dwarf_build_psymtabs -- build partial symtabs from DWARF debug info
-DESCRIPTION
+ SYNOPSIS
- Given pointer to two partial symbol table entries, compare
- them by name and return -N, 0, or +N (ala strcmp). Typically
- used by sorting routines like qsort().
+ void dwarf_build_psymtabs (struct objfile *objfile,
+ struct section_offsets *section_offsets,
+ int mainline, file_ptr dbfoff, unsigned int dbfsize,
+ file_ptr lnoffset, unsigned int lnsize)
-NOTES
+ DESCRIPTION
+
+ This function is called upon to build partial symtabs from files
+ containing DIE's (Dwarf Information Entries) and DWARF line numbers.
+
+ It is passed a bfd* containing the DIES
+ and line number information, the corresponding filename for that
+ file, a base address for relocating the symbols, a flag indicating
+ whether or not this debugging information is from a "main symbol
+ table" rather than a shared library or dynamically linked file,
+ and file offset/size pairs for the DIE information and line number
+ information.
- This is a copy from dbxread.c. It should be moved to a generic
- gdb file and made available for all psymtab builders (FIXME).
+ RETURNS
- Does direct compare of first two characters before punting
- and passing to strcmp for longer compares. Note that the
- original version had a bug whereby two null strings or two
- identically named one character strings would return the
- comparison of memory following the null byte.
+ No return value.
*/
-static int
-DEFUN(compare_psymbols, (s1, s2),
- struct partial_symbol *s1 AND
- struct partial_symbol *s2)
+void
+dwarf_build_psymtabs (objfile, section_offsets, mainline, dbfoff, dbfsize,
+ lnoffset, lnsize)
+ struct objfile *objfile;
+ struct section_offsets *section_offsets;
+ int mainline;
+ file_ptr dbfoff;
+ unsigned int dbfsize;
+ file_ptr lnoffset;
+ unsigned int lnsize;
{
- register char *st1 = SYMBOL_NAME (s1);
- register char *st2 = SYMBOL_NAME (s2);
+ bfd *abfd = objfile->obfd;
+ struct cleanup *back_to;
- if ((st1[0] - st2[0]) || !st1[0])
- {
- return (st1[0] - st2[0]);
- }
- else if ((st1[1] - st2[1]) || !st1[1])
+ current_objfile = objfile;
+ dbsize = dbfsize;
+ dbbase = xmalloc (dbsize);
+ dbroff = 0;
+ if ((bfd_seek (abfd, dbfoff, SEEK_SET) != 0) ||
+ (bfd_read (dbbase, dbsize, 1, abfd) != dbsize))
{
- return (st1[1] - st2[1]);
+ free (dbbase);
+ error ("can't read DWARF data from '%s'", bfd_get_filename (abfd));
}
- else
+ back_to = make_cleanup (free, dbbase);
+
+ /* If we are reinitializing, or if we have never loaded syms yet, init.
+ Since we have no idea how many DIES we are looking at, we just guess
+ some arbitrary value. */
+
+ if (mainline || objfile->global_psymbols.size == 0 ||
+ objfile->static_psymbols.size == 0)
{
- return (strcmp (st1 + 2, st2 + 2));
+ init_psymbol_list (objfile, 1024);
}
+
+ /* Save the relocation factor where everybody can see it. */
+
+ base_section_offsets = section_offsets;
+ baseaddr = ANOFFSET (section_offsets, 0);
+
+ /* Follow the compilation unit sibling chain, building a partial symbol
+ table entry for each one. Save enough information about each compilation
+ unit to locate the full DWARF information later. */
+
+ scan_compilation_units (dbbase, dbbase + dbsize, dbfoff, lnoffset, objfile);
+
+ do_cleanups (back_to);
+ current_objfile = NULL;
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- read_lexical_block_scope -- process all dies in a lexical block
+ read_lexical_block_scope -- process all dies in a lexical block
-SYNOPSIS
+ SYNOPSIS
- static void read_lexical_block_scope (struct dieinfo *dip,
- char *thisdie, char *enddie)
+ static void read_lexical_block_scope (struct dieinfo *dip,
+ char *thisdie, char *enddie)
-DESCRIPTION
+ DESCRIPTION
- Process all the DIES contained within a lexical block scope.
- Start a new scope, process the dies, and then close the scope.
+ Process all the DIES contained within a lexical block scope.
+ Start a new scope, process the dies, and then close the scope.
*/
static void
-DEFUN(read_lexical_block_scope, (dip, thisdie, enddie, objfile),
- struct dieinfo *dip AND
- char *thisdie AND
- char *enddie AND
- struct objfile *objfile)
-{
- openscope (NULL, dip -> at_low_pc, dip -> at_high_pc);
- process_dies (thisdie + dip -> dielength, enddie, objfile);
- closescope ();
+read_lexical_block_scope (dip, thisdie, enddie, objfile)
+ struct dieinfo *dip;
+ char *thisdie;
+ char *enddie;
+ struct objfile *objfile;
+{
+ register struct context_stack *new;
+
+ push_context (0, dip->at_low_pc);
+ process_dies (thisdie + dip->die_length, enddie, objfile);
+ new = pop_context ();
+ if (local_symbols != NULL)
+ {
+ finish_block (0, &local_symbols, new->old_blocks, new->start_addr,
+ dip->at_high_pc, objfile);
+ }
+ local_symbols = new->locals;
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- lookup_utype -- look up a user defined type from die reference
+ lookup_utype -- look up a user defined type from die reference
-SYNOPSIS
+ SYNOPSIS
- static type *lookup_utype (DIEREF dieref)
+ static type *lookup_utype (DIE_REF die_ref)
-DESCRIPTION
+ DESCRIPTION
- Given a DIE reference, lookup the user defined type associated with
- that DIE, if it has been registered already. If not registered, then
- return NULL. Alloc_utype() can be called to register an empty
- type for this reference, which will be filled in later when the
- actual referenced DIE is processed.
+ Given a DIE reference, lookup the user defined type associated with
+ that DIE, if it has been registered already. If not registered, then
+ return NULL. Alloc_utype() can be called to register an empty
+ type for this reference, which will be filled in later when the
+ actual referenced DIE is processed.
*/
static struct type *
-DEFUN(lookup_utype, (dieref), DIEREF dieref)
+lookup_utype (die_ref)
+ DIE_REF die_ref;
{
struct type *type = NULL;
int utypeidx;
-
- utypeidx = (dieref - dbroff) / 4;
+
+ utypeidx = (die_ref - dbroff) / 4;
if ((utypeidx < 0) || (utypeidx >= numutypes))
{
- dwarfwarn ("reference to DIE (0x%x) outside compilation unit", dieref);
+ complain (&bad_die_ref, DIE_ID, DIE_NAME);
}
else
{
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- alloc_utype -- add a user defined type for die reference
+ alloc_utype -- add a user defined type for die reference
-SYNOPSIS
+ SYNOPSIS
- static type *alloc_utype (DIEREF dieref, struct type *utypep)
+ static type *alloc_utype (DIE_REF die_ref, struct type *utypep)
-DESCRIPTION
+ DESCRIPTION
- Given a die reference DIEREF, and a possible pointer to a user
- defined type UTYPEP, register that this reference has a user
- defined type and either use the specified type in UTYPEP or
- make a new empty type that will be filled in later.
+ Given a die reference DIE_REF, and a possible pointer to a user
+ defined type UTYPEP, register that this reference has a user
+ defined type and either use the specified type in UTYPEP or
+ make a new empty type that will be filled in later.
- We should only be called after calling lookup_utype() to verify that
- there is not currently a type registered for DIEREF.
+ We should only be called after calling lookup_utype() to verify that
+ there is not currently a type registered for DIE_REF.
*/
static struct type *
-DEFUN(alloc_utype, (dieref, utypep),
- DIEREF dieref AND
- struct type *utypep)
+alloc_utype (die_ref, utypep)
+ DIE_REF die_ref;
+ struct type *utypep;
{
struct type **typep;
int utypeidx;
-
- utypeidx = (dieref - dbroff) / 4;
+
+ utypeidx = (die_ref - dbroff) / 4;
typep = utypes + utypeidx;
if ((utypeidx < 0) || (utypeidx >= numutypes))
{
- utypep = builtin_type_int;
- dwarfwarn ("reference to DIE (0x%x) outside compilation unit", dieref);
+ utypep = dwarf_fundamental_type (current_objfile, FT_INTEGER);
+ complain (&bad_die_ref, DIE_ID, DIE_NAME);
}
else if (*typep != NULL)
{
utypep = *typep;
- SQUAWK (("internal error: dup user type allocation"));
+ complain (&dup_user_type_allocation, DIE_ID, DIE_NAME);
}
else
{
if (utypep == NULL)
{
- utypep = (struct type *)
- obstack_alloc (symbol_obstack, sizeof (struct type));
- (void) memset (utypep, 0, sizeof (struct type));
+ utypep = alloc_type (current_objfile);
}
*typep = utypep;
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- decode_die_type -- return a type for a specified die
+ free_utypes -- free the utypes array and reset pointer & count
-SYNOPSIS
+ SYNOPSIS
- static struct type *decode_die_type (struct dieinfo *dip)
+ static void free_utypes (PTR dummy)
-DESCRIPTION
+ DESCRIPTION
+
+ Called via do_cleanups to free the utypes array, reset the pointer to NULL,
+ and set numutypes back to zero. This ensures that the utypes does not get
+ referenced after being freed.
+ */
+
+static void
+free_utypes (dummy)
+ PTR dummy;
+{
+ free (utypes);
+ utypes = NULL;
+ numutypes = 0;
+}
+
+
+/*
+
+ LOCAL FUNCTION
+
+ decode_die_type -- return a type for a specified die
+
+ SYNOPSIS
- Given a pointer to a die information structure DIP, decode the
- type of the die and return a pointer to the decoded type. All
- dies without specific types default to type int.
+ static struct type *decode_die_type (struct dieinfo *dip)
+
+ DESCRIPTION
+
+ Given a pointer to a die information structure DIP, decode the
+ type of the die and return a pointer to the decoded type. All
+ dies without specific types default to type int.
*/
static struct type *
-DEFUN(decode_die_type, (dip), struct dieinfo *dip)
+decode_die_type (dip)
+ struct dieinfo *dip;
{
struct type *type = NULL;
-
- if (dip -> at_fund_type != 0)
+
+ if (dip->at_fund_type != 0)
{
- type = decode_fund_type (dip -> at_fund_type);
+ type = decode_fund_type (dip->at_fund_type);
}
- else if (dip -> at_mod_fund_type != NULL)
+ else if (dip->at_mod_fund_type != NULL)
{
- type = decode_mod_fund_type (dip -> at_mod_fund_type);
+ type = decode_mod_fund_type (dip->at_mod_fund_type);
}
- else if (dip -> at_user_def_type)
+ else if (dip->at_user_def_type)
{
- if ((type = lookup_utype (dip -> at_user_def_type)) == NULL)
+ if ((type = lookup_utype (dip->at_user_def_type)) == NULL)
{
- type = alloc_utype (dip -> at_user_def_type, NULL);
+ type = alloc_utype (dip->at_user_def_type, NULL);
}
}
- else if (dip -> at_mod_u_d_type)
+ else if (dip->at_mod_u_d_type)
{
- type = decode_mod_u_d_type (dip -> at_mod_u_d_type);
+ type = decode_mod_u_d_type (dip->at_mod_u_d_type);
}
else
{
- type = builtin_type_int;
+ type = dwarf_fundamental_type (current_objfile, FT_VOID);
}
return (type);
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- struct_type -- compute and return the type for a struct or union
+ struct_type -- compute and return the type for a struct or union
-SYNOPSIS
+ SYNOPSIS
- static struct type *struct_type (struct dieinfo *dip, char *thisdie,
- char *enddie, struct objfile *objfile)
+ static struct type *struct_type (struct dieinfo *dip, char *thisdie,
+ char *enddie, struct objfile *objfile)
-DESCRIPTION
+ DESCRIPTION
- Given pointer to a die information structure for a die which
- defines a union or structure (and MUST define one or the other),
- and pointers to the raw die data that define the range of dies which
- define the members, compute and return the user defined type for the
- structure or union.
+ Given pointer to a die information structure for a die which
+ defines a union or structure (and MUST define one or the other),
+ and pointers to the raw die data that define the range of dies which
+ define the members, compute and return the user defined type for the
+ structure or union.
*/
static struct type *
-DEFUN(struct_type, (dip, thisdie, enddie, objfile),
- struct dieinfo *dip AND
- char *thisdie AND
- char *enddie AND
- struct objfile *objfile)
+struct_type (dip, thisdie, enddie, objfile)
+ struct dieinfo *dip;
+ char *thisdie;
+ char *enddie;
+ struct objfile *objfile;
{
struct type *type;
- struct nextfield {
- struct nextfield *next;
- struct field field;
- };
+ struct nextfield
+ {
+ struct nextfield *next;
+ struct field field;
+ };
struct nextfield *list = NULL;
struct nextfield *new;
int nfields = 0;
int n;
- char *tpart1;
struct dieinfo mbr;
char *nextdie;
-
- if ((type = lookup_utype (dip -> dieref)) == NULL)
+ int anonymous_size;
+
+ if ((type = lookup_utype (dip->die_ref)) == NULL)
{
/* No forward references created an empty type, so install one now */
- type = alloc_utype (dip -> dieref, NULL);
+ type = alloc_utype (dip->die_ref, NULL);
}
- TYPE_CPLUS_SPECIFIC(type) = &cplus_struct_default;
- switch (dip -> dietag)
+ INIT_CPLUS_SPECIFIC (type);
+ switch (dip->die_tag)
{
- case TAG_structure_type:
- TYPE_CODE (type) = TYPE_CODE_STRUCT;
- tpart1 = "struct";
- break;
- case TAG_union_type:
- TYPE_CODE (type) = TYPE_CODE_UNION;
- tpart1 = "union";
- break;
- default:
- /* Should never happen */
- TYPE_CODE (type) = TYPE_CODE_UNDEF;
- tpart1 = "???";
- SQUAWK (("missing structure or union tag"));
- break;
+ case TAG_class_type:
+ TYPE_CODE (type) = TYPE_CODE_CLASS;
+ break;
+ case TAG_structure_type:
+ TYPE_CODE (type) = TYPE_CODE_STRUCT;
+ break;
+ case TAG_union_type:
+ TYPE_CODE (type) = TYPE_CODE_UNION;
+ break;
+ default:
+ /* Should never happen */
+ TYPE_CODE (type) = TYPE_CODE_UNDEF;
+ complain (&missing_tag, DIE_ID, DIE_NAME);
+ break;
}
/* Some compilers try to be helpful by inventing "fake" names for
anonymous enums, structures, and unions, like "~0fake" or ".0fake".
Thanks, but no thanks... */
- if (dip -> at_name != NULL
- && *dip -> at_name != '~'
- && *dip -> at_name != '.')
- {
- TYPE_NAME (type) = obconcat (tpart1, " ", dip -> at_name);
- }
- if (dip -> at_byte_size != 0)
- {
- TYPE_LENGTH (type) = dip -> at_byte_size;
- }
- thisdie += dip -> dielength;
+ if (dip->at_name != NULL
+ && *dip->at_name != '~'
+ && *dip->at_name != '.')
+ {
+ TYPE_TAG_NAME (type) = obconcat (&objfile->type_obstack,
+ "", "", dip->at_name);
+ }
+ /* Use whatever size is known. Zero is a valid size. We might however
+ wish to check has_at_byte_size to make sure that some byte size was
+ given explicitly, but DWARF doesn't specify that explicit sizes of
+ zero have to present, so complaining about missing sizes should
+ probably not be the default. */
+ TYPE_LENGTH (type) = dip->at_byte_size;
+ thisdie += dip->die_length;
while (thisdie < enddie)
{
- basicdieinfo (&mbr, thisdie);
- completedieinfo (&mbr);
- if (mbr.dielength <= sizeof (long))
+ basicdieinfo (&mbr, thisdie, objfile);
+ completedieinfo (&mbr, objfile);
+ if (mbr.die_length <= SIZEOF_DIE_LENGTH)
{
break;
}
}
else
{
- nextdie = thisdie + mbr.dielength;
+ nextdie = thisdie + mbr.die_length;
}
- switch (mbr.dietag)
+ switch (mbr.die_tag)
{
case TAG_member:
/* Get space to record the next field's data. */
new = (struct nextfield *) alloca (sizeof (struct nextfield));
- new -> next = list;
+ new->next = list;
list = new;
/* Save the data. */
- list -> field.name = savestring (mbr.at_name, strlen (mbr.at_name));
- list -> field.type = decode_die_type (&mbr);
- list -> field.bitpos = 8 * locval (mbr.at_location);
- list -> field.bitsize = 0;
- nfields++;
- break;
- default:
- process_dies (thisdie, nextdie, objfile);
- break;
- }
+ list->field.name =
+ obsavestring (mbr.at_name, strlen (mbr.at_name),
+ &objfile->type_obstack);
+ FIELD_TYPE (list->field) = decode_die_type (&mbr);
+ FIELD_BITPOS (list->field) = 8 * locval (&mbr);
+ /* Handle bit fields. */
+ FIELD_BITSIZE (list->field) = mbr.at_bit_size;
+ if (BITS_BIG_ENDIAN)
+ {
+ /* For big endian bits, the at_bit_offset gives the
+ additional bit offset from the MSB of the containing
+ anonymous object to the MSB of the field. We don't
+ have to do anything special since we don't need to
+ know the size of the anonymous object. */
+ FIELD_BITPOS (list->field) += mbr.at_bit_offset;
+ }
+ else
+ {
+ /* For little endian bits, we need to have a non-zero
+ at_bit_size, so that we know we are in fact dealing
+ with a bitfield. Compute the bit offset to the MSB
+ of the anonymous object, subtract off the number of
+ bits from the MSB of the field to the MSB of the
+ object, and then subtract off the number of bits of
+ the field itself. The result is the bit offset of
+ the LSB of the field. */
+ if (mbr.at_bit_size > 0)
+ {
+ if (mbr.has_at_byte_size)
+ {
+ /* The size of the anonymous object containing
+ the bit field is explicit, so use the
+ indicated size (in bytes). */
+ anonymous_size = mbr.at_byte_size;
+ }
+ else
+ {
+ /* The size of the anonymous object containing
+ the bit field matches the size of an object
+ of the bit field's type. DWARF allows
+ at_byte_size to be left out in such cases, as
+ a debug information size optimization. */
+ anonymous_size = TYPE_LENGTH (list->field.type);
+ }
+ FIELD_BITPOS (list->field) +=
+ anonymous_size * 8 - mbr.at_bit_offset - mbr.at_bit_size;
+ }
+ }
+ nfields++;
+ break;
+ default:
+ process_dies (thisdie, nextdie, objfile);
+ break;
+ }
thisdie = nextdie;
}
/* Now create the vector of fields, and record how big it is. We may
{
TYPE_NFIELDS (type) = nfields;
TYPE_FIELDS (type) = (struct field *)
- obstack_alloc (symbol_obstack, sizeof (struct field) * nfields);
+ TYPE_ALLOC (type, sizeof (struct field) * nfields);
/* Copy the saved-up fields into the field vector. */
- for (n = nfields; list; list = list -> next)
+ for (n = nfields; list; list = list->next)
{
- TYPE_FIELD (type, --n) = list -> field;
- }
+ TYPE_FIELD (type, --n) = list->field;
+ }
}
return (type);
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- read_structure_scope -- process all dies within struct or union
+ read_structure_scope -- process all dies within struct or union
-SYNOPSIS
+ SYNOPSIS
- static void read_structure_scope (struct dieinfo *dip,
- char *thisdie, char *enddie, struct objfile *objfile)
+ static void read_structure_scope (struct dieinfo *dip,
+ char *thisdie, char *enddie, struct objfile *objfile)
-DESCRIPTION
+ DESCRIPTION
- Called when we find the DIE that starts a structure or union
- scope (definition) to process all dies that define the members
- of the structure or union. DIP is a pointer to the die info
- struct for the DIE that names the structure or union.
+ Called when we find the DIE that starts a structure or union
+ scope (definition) to process all dies that define the members
+ of the structure or union. DIP is a pointer to the die info
+ struct for the DIE that names the structure or union.
-NOTES
+ NOTES
+
+ Note that we need to call struct_type regardless of whether or not
+ the DIE has an at_name attribute, since it might be an anonymous
+ structure or union. This gets the type entered into our set of
+ user defined types.
+
+ However, if the structure is incomplete (an opaque struct/union)
+ then suppress creating a symbol table entry for it since gdb only
+ wants to find the one with the complete definition. Note that if
+ it is complete, we just call new_symbol, which does it's own
+ checking about whether the struct/union is anonymous or not (and
+ suppresses creating a symbol table entry itself).
- Note that we need to call struct_type regardless of whether or not
- the DIE has an at_name attribute, since it might be an anonymous
- structure or union. This gets the type entered into our set of
- user defined types.
-
- However, if the structure is incomplete (an opaque struct/union)
- then suppress creating a symbol table entry for it since gdb only
- wants to find the one with the complete definition. Note that if
- it is complete, we just call new_symbol, which does it's own
- checking about whether the struct/union is anonymous or not (and
- suppresses creating a symbol table entry itself).
-
*/
static void
-DEFUN(read_structure_scope, (dip, thisdie, enddie, objfile),
- struct dieinfo *dip AND
- char *thisdie AND
- char *enddie AND
- struct objfile *objfile)
+read_structure_scope (dip, thisdie, enddie, objfile)
+ struct dieinfo *dip;
+ char *thisdie;
+ char *enddie;
+ struct objfile *objfile;
{
struct type *type;
struct symbol *sym;
-
+
type = struct_type (dip, thisdie, enddie, objfile);
if (!(TYPE_FLAGS (type) & TYPE_FLAG_STUB))
{
- if ((sym = new_symbol (dip)) != NULL)
+ sym = new_symbol (dip, objfile);
+ if (sym != NULL)
{
SYMBOL_TYPE (sym) = type;
+ if (cu_language == language_cplus)
+ {
+ synthesize_typedef (dip, objfile, type);
+ }
}
}
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- decode_array_element_type -- decode type of the array elements
+ decode_array_element_type -- decode type of the array elements
-SYNOPSIS
+ SYNOPSIS
- static struct type *decode_array_element_type (char *scan, char *end)
+ static struct type *decode_array_element_type (char *scan, char *end)
-DESCRIPTION
+ DESCRIPTION
- As the last step in decoding the array subscript information for an
- array DIE, we need to decode the type of the array elements. We are
- passed a pointer to this last part of the subscript information and
- must return the appropriate type. If the type attribute is not
- recognized, just warn about the problem and return type int.
+ As the last step in decoding the array subscript information for an
+ array DIE, we need to decode the type of the array elements. We are
+ passed a pointer to this last part of the subscript information and
+ must return the appropriate type. If the type attribute is not
+ recognized, just warn about the problem and return type int.
*/
static struct type *
-DEFUN(decode_array_element_type, (scan, end), char *scan AND char *end)
+decode_array_element_type (scan)
+ char *scan;
{
struct type *typep;
- short attribute;
- DIEREF dieref;
+ DIE_REF die_ref;
+ unsigned short attribute;
unsigned short fundtype;
-
- (void) memcpy (&attribute, scan, sizeof (short));
- scan += sizeof (short);
- switch (attribute)
- {
- case AT_fund_type:
- (void) memcpy (&fundtype, scan, sizeof (short));
- typep = decode_fund_type (fundtype);
- break;
- case AT_mod_fund_type:
- typep = decode_mod_fund_type (scan);
- break;
- case AT_user_def_type:
- (void) memcpy (&dieref, scan, sizeof (DIEREF));
- if ((typep = lookup_utype (dieref)) == NULL)
+ int nbytes;
+
+ attribute = target_to_host (scan, SIZEOF_ATTRIBUTE, GET_UNSIGNED,
+ current_objfile);
+ scan += SIZEOF_ATTRIBUTE;
+ if ((nbytes = attribute_size (attribute)) == -1)
+ {
+ complain (&bad_array_element_type, DIE_ID, DIE_NAME, attribute);
+ typep = dwarf_fundamental_type (current_objfile, FT_INTEGER);
+ }
+ else
+ {
+ switch (attribute)
{
- typep = alloc_utype (dieref, NULL);
+ case AT_fund_type:
+ fundtype = target_to_host (scan, nbytes, GET_UNSIGNED,
+ current_objfile);
+ typep = decode_fund_type (fundtype);
+ break;
+ case AT_mod_fund_type:
+ typep = decode_mod_fund_type (scan);
+ break;
+ case AT_user_def_type:
+ die_ref = target_to_host (scan, nbytes, GET_UNSIGNED,
+ current_objfile);
+ if ((typep = lookup_utype (die_ref)) == NULL)
+ {
+ typep = alloc_utype (die_ref, NULL);
+ }
+ break;
+ case AT_mod_u_d_type:
+ typep = decode_mod_u_d_type (scan);
+ break;
+ default:
+ complain (&bad_array_element_type, DIE_ID, DIE_NAME, attribute);
+ typep = dwarf_fundamental_type (current_objfile, FT_INTEGER);
+ break;
}
- break;
- case AT_mod_u_d_type:
- typep = decode_mod_u_d_type (scan);
- break;
- default:
- SQUAWK (("bad array element type attribute 0x%x", attribute));
- typep = builtin_type_int;
- break;
}
return (typep);
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- decode_subscr_data -- decode array subscript and element type data
+ decode_subscript_data_item -- decode array subscript item
-SYNOPSIS
+ SYNOPSIS
- static struct type *decode_subscr_data (char *scan, char *end)
+ static struct type *
+ decode_subscript_data_item (char *scan, char *end)
-DESCRIPTION
+ DESCRIPTION
+
+ The array subscripts and the data type of the elements of an
+ array are described by a list of data items, stored as a block
+ of contiguous bytes. There is a data item describing each array
+ dimension, and a final data item describing the element type.
+ The data items are ordered the same as their appearance in the
+ source (I.E. leftmost dimension first, next to leftmost second,
+ etc).
+
+ The data items describing each array dimension consist of four
+ parts: (1) a format specifier, (2) type type of the subscript
+ index, (3) a description of the low bound of the array dimension,
+ and (4) a description of the high bound of the array dimension.
+
+ The last data item is the description of the type of each of
+ the array elements.
- The array subscripts and the data type of the elements of an
- array are described by a list of data items, stored as a block
- of contiguous bytes. There is a data item describing each array
- dimension, and a final data item describing the element type.
- The data items are ordered the same as their appearance in the
- source (I.E. leftmost dimension first, next to leftmost second,
- etc).
+ We are passed a pointer to the start of the block of bytes
+ containing the remaining data items, and a pointer to the first
+ byte past the data. This function recursively decodes the
+ remaining data items and returns a type.
- We are passed a pointer to the start of the block of bytes
- containing the data items, and a pointer to the first byte past
- the data. This function decodes the data and returns a type.
+ If we somehow fail to decode some data, we complain about it
+ and return a type "array of int".
-BUGS
- FIXME: This code only implements the forms currently used
- by the AT&T and GNU C compilers.
+ BUGS
+ FIXME: This code only implements the forms currently used
+ by the AT&T and GNU C compilers.
- The end pointer is supplied for error checking, maybe we should
- use it for that...
+ The end pointer is supplied for error checking, maybe we should
+ use it for that...
*/
static struct type *
-DEFUN(decode_subscr_data, (scan, end), char *scan AND char *end)
+decode_subscript_data_item (scan, end)
+ char *scan;
+ char *end;
{
- struct type *typep = NULL;
- struct type *nexttype;
- int format;
- short fundtype;
- long lowbound;
- long highbound;
-
- format = *scan++;
+ struct type *typep = NULL; /* Array type we are building */
+ struct type *nexttype; /* Type of each element (may be array) */
+ struct type *indextype; /* Type of this index */
+ struct type *rangetype;
+ unsigned int format;
+ unsigned short fundtype;
+ unsigned long lowbound;
+ unsigned long highbound;
+ int nbytes;
+
+ format = target_to_host (scan, SIZEOF_FORMAT_SPECIFIER, GET_UNSIGNED,
+ current_objfile);
+ scan += SIZEOF_FORMAT_SPECIFIER;
switch (format)
{
case FMT_ET:
- typep = decode_array_element_type (scan, end);
+ typep = decode_array_element_type (scan);
break;
case FMT_FT_C_C:
- (void) memcpy (&fundtype, scan, sizeof (short));
- scan += sizeof (short);
- if (fundtype != FT_integer && fundtype != FT_signed_integer
- && fundtype != FT_unsigned_integer)
+ fundtype = target_to_host (scan, SIZEOF_FMT_FT, GET_UNSIGNED,
+ current_objfile);
+ indextype = decode_fund_type (fundtype);
+ scan += SIZEOF_FMT_FT;
+ nbytes = TARGET_FT_LONG_SIZE (current_objfile);
+ lowbound = target_to_host (scan, nbytes, GET_UNSIGNED, current_objfile);
+ scan += nbytes;
+ highbound = target_to_host (scan, nbytes, GET_UNSIGNED, current_objfile);
+ scan += nbytes;
+ nexttype = decode_subscript_data_item (scan, end);
+ if (nexttype == NULL)
{
- SQUAWK (("array subscripts must be integral types, not type 0x%x",
- fundtype));
- }
- else
- {
- (void) memcpy (&lowbound, scan, sizeof (long));
- scan += sizeof (long);
- (void) memcpy (&highbound, scan, sizeof (long));
- scan += sizeof (long);
- nexttype = decode_subscr_data (scan, end);
- if (nexttype != NULL)
- {
- typep = (struct type *)
- obstack_alloc (symbol_obstack, sizeof (struct type));
- (void) memset (typep, 0, sizeof (struct type));
- TYPE_CODE (typep) = TYPE_CODE_ARRAY;
- TYPE_LENGTH (typep) = TYPE_LENGTH (nexttype);
- TYPE_LENGTH (typep) *= lowbound + highbound + 1;
- TYPE_TARGET_TYPE (typep) = nexttype;
- }
+ /* Munged subscript data or other problem, fake it. */
+ complain (&subscript_data_items, DIE_ID, DIE_NAME);
+ nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER);
}
+ rangetype = create_range_type ((struct type *) NULL, indextype,
+ lowbound, highbound);
+ typep = create_array_type ((struct type *) NULL, nexttype, rangetype);
break;
case FMT_FT_C_X:
case FMT_FT_X_C:
case FMT_UT_C_X:
case FMT_UT_X_C:
case FMT_UT_X_X:
- SQUAWK (("array subscript format 0x%x not handled yet", format));
+ complain (&unhandled_array_subscript_format, DIE_ID, DIE_NAME, format);
+ nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER);
+ rangetype = create_range_type ((struct type *) NULL, nexttype, 0, 0);
+ typep = create_array_type ((struct type *) NULL, nexttype, rangetype);
break;
default:
- SQUAWK (("unknown array subscript format %x", format));
+ complain (&unknown_array_subscript_format, DIE_ID, DIE_NAME, format);
+ nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER);
+ rangetype = create_range_type ((struct type *) NULL, nexttype, 0, 0);
+ typep = create_array_type ((struct type *) NULL, nexttype, rangetype);
break;
}
return (typep);
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- read_array_type -- read TAG_array_type DIE
+ dwarf_read_array_type -- read TAG_array_type DIE
-SYNOPSIS
+ SYNOPSIS
- static void read_array_type (struct dieinfo *dip)
+ static void dwarf_read_array_type (struct dieinfo *dip)
-DESCRIPTION
+ DESCRIPTION
- Extract all information from a TAG_array_type DIE and add to
- the user defined type vector.
+ Extract all information from a TAG_array_type DIE and add to
+ the user defined type vector.
*/
static void
-DEFUN(read_array_type, (dip), struct dieinfo *dip)
+dwarf_read_array_type (dip)
+ struct dieinfo *dip;
{
struct type *type;
+ struct type *utype;
char *sub;
char *subend;
- short temp;
-
- if (dip -> at_ordering != ORD_row_major)
+ unsigned short blocksz;
+ int nbytes;
+
+ if (dip->at_ordering != ORD_row_major)
{
/* FIXME: Can gdb even handle column major arrays? */
- SQUAWK (("array not row major; not handled correctly"));
+ complain (¬_row_major, DIE_ID, DIE_NAME);
}
- if ((sub = dip -> at_subscr_data) != NULL)
+ if ((sub = dip->at_subscr_data) != NULL)
{
- (void) memcpy (&temp, sub, sizeof (short));
- subend = sub + sizeof (short) + temp;
- sub += sizeof (short);
- type = decode_subscr_data (sub, subend);
- if (type == NULL)
+ nbytes = attribute_size (AT_subscr_data);
+ blocksz = target_to_host (sub, nbytes, GET_UNSIGNED, current_objfile);
+ subend = sub + nbytes + blocksz;
+ sub += nbytes;
+ type = decode_subscript_data_item (sub, subend);
+ if ((utype = lookup_utype (dip->die_ref)) == NULL)
{
- type = alloc_utype (dip -> dieref, NULL);
- TYPE_CODE (type) = TYPE_CODE_ARRAY;
- TYPE_TARGET_TYPE (type) = builtin_type_int;
- TYPE_LENGTH (type) = 1 * TYPE_LENGTH (TYPE_TARGET_TYPE (type));
+ /* Install user defined type that has not been referenced yet. */
+ alloc_utype (dip->die_ref, type);
+ }
+ else if (TYPE_CODE (utype) == TYPE_CODE_UNDEF)
+ {
+ /* Ick! A forward ref has already generated a blank type in our
+ slot, and this type probably already has things pointing to it
+ (which is what caused it to be created in the first place).
+ If it's just a place holder we can plop our fully defined type
+ on top of it. We can't recover the space allocated for our
+ new type since it might be on an obstack, but we could reuse
+ it if we kept a list of them, but it might not be worth it
+ (FIXME). */
+ *utype = *type;
}
else
{
- type = alloc_utype (dip -> dieref, type);
+ /* Double ick! Not only is a type already in our slot, but
+ someone has decorated it. Complain and leave it alone. */
+ complain (&dup_user_type_definition, DIE_ID, DIE_NAME);
}
}
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- read_subroutine_type -- process TAG_subroutine_type dies
+ read_tag_pointer_type -- read TAG_pointer_type DIE
-SYNOPSIS
+ SYNOPSIS
- static void read_subroutine_type (struct dieinfo *dip, char thisdie,
- char *enddie)
+ static void read_tag_pointer_type (struct dieinfo *dip)
-DESCRIPTION
+ DESCRIPTION
+
+ Extract all information from a TAG_pointer_type DIE and add to
+ the user defined type vector.
+ */
+
+static void
+read_tag_pointer_type (dip)
+ struct dieinfo *dip;
+{
+ struct type *type;
+ struct type *utype;
+
+ type = decode_die_type (dip);
+ if ((utype = lookup_utype (dip->die_ref)) == NULL)
+ {
+ utype = lookup_pointer_type (type);
+ alloc_utype (dip->die_ref, utype);
+ }
+ else
+ {
+ TYPE_TARGET_TYPE (utype) = type;
+ TYPE_POINTER_TYPE (type) = utype;
- Handle DIES due to C code like:
+ /* We assume the machine has only one representation for pointers! */
+ /* FIXME: Possably a poor assumption */
+ TYPE_LENGTH (utype) = TARGET_PTR_BIT / TARGET_CHAR_BIT;
+ TYPE_CODE (utype) = TYPE_CODE_PTR;
+ }
+}
- struct foo {
- int (*funcp)(int a, long l); (Generates TAG_subroutine_type DIE)
- int b;
- };
+/*
-NOTES
+ LOCAL FUNCTION
+
+ read_tag_string_type -- read TAG_string_type DIE
+
+ SYNOPSIS
+
+ static void read_tag_string_type (struct dieinfo *dip)
+
+ DESCRIPTION
- The parameter DIES are currently ignored. See if gdb has a way to
- include this info in it's type system, and decode them if so. Is
- this what the type structure's "arg_types" field is for? (FIXME)
+ Extract all information from a TAG_string_type DIE and add to
+ the user defined type vector. It isn't really a user defined
+ type, but it behaves like one, with other DIE's using an
+ AT_user_def_type attribute to reference it.
*/
static void
-DEFUN(read_subroutine_type, (dip, thisdie, enddie),
- struct dieinfo *dip AND
- char *thisdie AND
- char *enddie)
+read_tag_string_type (dip)
+ struct dieinfo *dip;
{
- struct type *type;
-
+ struct type *utype;
+ struct type *indextype;
+ struct type *rangetype;
+ unsigned long lowbound = 0;
+ unsigned long highbound;
+
+ if (dip->has_at_byte_size)
+ {
+ /* A fixed bounds string */
+ highbound = dip->at_byte_size - 1;
+ }
+ else
+ {
+ /* A varying length string. Stub for now. (FIXME) */
+ highbound = 1;
+ }
+ indextype = dwarf_fundamental_type (current_objfile, FT_INTEGER);
+ rangetype = create_range_type ((struct type *) NULL, indextype, lowbound,
+ highbound);
+
+ utype = lookup_utype (dip->die_ref);
+ if (utype == NULL)
+ {
+ /* No type defined, go ahead and create a blank one to use. */
+ utype = alloc_utype (dip->die_ref, (struct type *) NULL);
+ }
+ else
+ {
+ /* Already a type in our slot due to a forward reference. Make sure it
+ is a blank one. If not, complain and leave it alone. */
+ if (TYPE_CODE (utype) != TYPE_CODE_UNDEF)
+ {
+ complain (&dup_user_type_definition, DIE_ID, DIE_NAME);
+ return;
+ }
+ }
+
+ /* Create the string type using the blank type we either found or created. */
+ utype = create_string_type (utype, rangetype);
+}
+
+/*
+
+ LOCAL FUNCTION
+
+ read_subroutine_type -- process TAG_subroutine_type dies
+
+ SYNOPSIS
+
+ static void read_subroutine_type (struct dieinfo *dip, char thisdie,
+ char *enddie)
+
+ DESCRIPTION
+
+ Handle DIES due to C code like:
+
+ struct foo {
+ int (*funcp)(int a, long l); (Generates TAG_subroutine_type DIE)
+ int b;
+ };
+
+ NOTES
+
+ The parameter DIES are currently ignored. See if gdb has a way to
+ include this info in it's type system, and decode them if so. Is
+ this what the type structure's "arg_types" field is for? (FIXME)
+ */
+
+static void
+read_subroutine_type (dip, thisdie, enddie)
+ struct dieinfo *dip;
+ char *thisdie;
+ char *enddie;
+{
+ struct type *type; /* Type that this function returns */
+ struct type *ftype; /* Function that returns above type */
+
+ /* Decode the type that this subroutine returns */
+
type = decode_die_type (dip);
- type = lookup_function_type (type);
- type = alloc_utype (dip -> dieref, type);
+
+ /* Check to see if we already have a partially constructed user
+ defined type for this DIE, from a forward reference. */
+
+ if ((ftype = lookup_utype (dip->die_ref)) == NULL)
+ {
+ /* This is the first reference to one of these types. Make
+ a new one and place it in the user defined types. */
+ ftype = lookup_function_type (type);
+ alloc_utype (dip->die_ref, ftype);
+ }
+ else if (TYPE_CODE (ftype) == TYPE_CODE_UNDEF)
+ {
+ /* We have an existing partially constructed type, so bash it
+ into the correct type. */
+ TYPE_TARGET_TYPE (ftype) = type;
+ TYPE_LENGTH (ftype) = 1;
+ TYPE_CODE (ftype) = TYPE_CODE_FUNC;
+ }
+ else
+ {
+ complain (&dup_user_type_definition, DIE_ID, DIE_NAME);
+ }
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- read_enumeration -- process dies which define an enumeration
+ read_enumeration -- process dies which define an enumeration
-SYNOPSIS
+ SYNOPSIS
- static void read_enumeration (struct dieinfo *dip, char *thisdie,
- char *enddie)
+ static void read_enumeration (struct dieinfo *dip, char *thisdie,
+ char *enddie, struct objfile *objfile)
-DESCRIPTION
+ DESCRIPTION
- Given a pointer to a die which begins an enumeration, process all
- the dies that define the members of the enumeration.
+ Given a pointer to a die which begins an enumeration, process all
+ the dies that define the members of the enumeration.
-NOTES
+ NOTES
- Note that we need to call enum_type regardless of whether or not we
- have a symbol, since we might have an enum without a tag name (thus
- no symbol for the tagname).
+ Note that we need to call enum_type regardless of whether or not we
+ have a symbol, since we might have an enum without a tag name (thus
+ no symbol for the tagname).
*/
static void
-DEFUN(read_enumeration, (dip, thisdie, enddie),
- struct dieinfo *dip AND
- char *thisdie AND
- char *enddie)
+read_enumeration (dip, thisdie, enddie, objfile)
+ struct dieinfo *dip;
+ char *thisdie;
+ char *enddie;
+ struct objfile *objfile;
{
struct type *type;
struct symbol *sym;
-
- type = enum_type (dip);
- if ((sym = new_symbol (dip)) != NULL)
+
+ type = enum_type (dip, objfile);
+ sym = new_symbol (dip, objfile);
+ if (sym != NULL)
{
SYMBOL_TYPE (sym) = type;
+ if (cu_language == language_cplus)
+ {
+ synthesize_typedef (dip, objfile, type);
+ }
}
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- enum_type -- decode and return a type for an enumeration
+ enum_type -- decode and return a type for an enumeration
-SYNOPSIS
+ SYNOPSIS
- static type *enum_type (struct dieinfo *dip)
+ static type *enum_type (struct dieinfo *dip, struct objfile *objfile)
-DESCRIPTION
+ DESCRIPTION
- Given a pointer to a die information structure for the die which
- starts an enumeration, process all the dies that define the members
- of the enumeration and return a type pointer for the enumeration.
+ Given a pointer to a die information structure for the die which
+ starts an enumeration, process all the dies that define the members
+ of the enumeration and return a type pointer for the enumeration.
- At the same time, for each member of the enumeration, create a
- symbol for it with namespace VAR_NAMESPACE and class LOC_CONST,
- and give it the type of the enumeration itself.
+ At the same time, for each member of the enumeration, create a
+ symbol for it with namespace VAR_NAMESPACE and class LOC_CONST,
+ and give it the type of the enumeration itself.
-NOTES
+ NOTES
- Note that the DWARF specification explicitly mandates that enum
- constants occur in reverse order from the source program order,
- for "consistency" and because this ordering is easier for many
- compilers to generate. (Draft 5, sec 3.9.5, Enumeration type
- Entries). Because gdb wants to see the enum members in program
- source order, we have to ensure that the order gets reversed while
- we are processing them.
+ Note that the DWARF specification explicitly mandates that enum
+ constants occur in reverse order from the source program order,
+ for "consistency" and because this ordering is easier for many
+ compilers to generate. (Draft 6, sec 3.8.5, Enumeration type
+ Entries). Because gdb wants to see the enum members in program
+ source order, we have to ensure that the order gets reversed while
+ we are processing them.
*/
static struct type *
-DEFUN(enum_type, (dip), struct dieinfo *dip)
+enum_type (dip, objfile)
+ struct dieinfo *dip;
+ struct objfile *objfile;
{
struct type *type;
- struct nextfield {
- struct nextfield *next;
- struct field field;
- };
+ struct nextfield
+ {
+ struct nextfield *next;
+ struct field field;
+ };
struct nextfield *list = NULL;
struct nextfield *new;
int nfields = 0;
int n;
char *scan;
char *listend;
- long ltemp;
- short stemp;
+ unsigned short blocksz;
struct symbol *sym;
-
- if ((type = lookup_utype (dip -> dieref)) == NULL)
+ int nbytes;
+ int unsigned_enum = 1;
+
+ if ((type = lookup_utype (dip->die_ref)) == NULL)
{
/* No forward references created an empty type, so install one now */
- type = alloc_utype (dip -> dieref, NULL);
+ type = alloc_utype (dip->die_ref, NULL);
}
TYPE_CODE (type) = TYPE_CODE_ENUM;
/* Some compilers try to be helpful by inventing "fake" names for
anonymous enums, structures, and unions, like "~0fake" or ".0fake".
Thanks, but no thanks... */
- if (dip -> at_name != NULL
- && *dip -> at_name != '~'
- && *dip -> at_name != '.')
+ if (dip->at_name != NULL
+ && *dip->at_name != '~'
+ && *dip->at_name != '.')
{
- TYPE_NAME (type) = obconcat ("enum", " ", dip -> at_name);
+ TYPE_TAG_NAME (type) = obconcat (&objfile->type_obstack,
+ "", "", dip->at_name);
}
- if (dip -> at_byte_size != 0)
+ if (dip->at_byte_size != 0)
{
- TYPE_LENGTH (type) = dip -> at_byte_size;
+ TYPE_LENGTH (type) = dip->at_byte_size;
}
- if ((scan = dip -> at_element_list) != NULL)
+ if ((scan = dip->at_element_list) != NULL)
{
- if (dip -> short_element_list)
+ if (dip->short_element_list)
{
- (void) memcpy (&stemp, scan, sizeof (stemp));
- listend = scan + stemp + sizeof (stemp);
- scan += sizeof (stemp);
+ nbytes = attribute_size (AT_short_element_list);
}
else
{
- (void) memcpy (<emp, scan, sizeof (ltemp));
- listend = scan + ltemp + sizeof (ltemp);
- scan += sizeof (ltemp);
+ nbytes = attribute_size (AT_element_list);
}
+ blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile);
+ listend = scan + nbytes + blocksz;
+ scan += nbytes;
while (scan < listend)
{
new = (struct nextfield *) alloca (sizeof (struct nextfield));
- new -> next = list;
+ new->next = list;
list = new;
- list -> field.type = NULL;
- list -> field.bitsize = 0;
- (void) memcpy (&list -> field.bitpos, scan, sizeof (long));
- scan += sizeof (long);
- list -> field.name = savestring (scan, strlen (scan));
+ FIELD_TYPE (list->field) = NULL;
+ FIELD_BITSIZE (list->field) = 0;
+ FIELD_BITPOS (list->field) =
+ target_to_host (scan, TARGET_FT_LONG_SIZE (objfile), GET_SIGNED,
+ objfile);
+ scan += TARGET_FT_LONG_SIZE (objfile);
+ list->field.name = obsavestring (scan, strlen (scan),
+ &objfile->type_obstack);
scan += strlen (scan) + 1;
nfields++;
/* Handcraft a new symbol for this enum member. */
- sym = (struct symbol *) obstack_alloc (symbol_obstack,
+ sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack,
sizeof (struct symbol));
- (void) memset (sym, 0, sizeof (struct symbol));
- SYMBOL_NAME (sym) = create_name (list -> field.name, symbol_obstack);
+ memset (sym, 0, sizeof (struct symbol));
+ SYMBOL_NAME (sym) = create_name (list->field.name,
+ &objfile->symbol_obstack);
+ SYMBOL_INIT_LANGUAGE_SPECIFIC (sym, cu_language);
SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
SYMBOL_CLASS (sym) = LOC_CONST;
SYMBOL_TYPE (sym) = type;
- SYMBOL_VALUE (sym) = list -> field.bitpos;
- add_symbol_to_list (sym, &scope -> symbols);
+ SYMBOL_VALUE (sym) = FIELD_BITPOS (list->field);
+ if (SYMBOL_VALUE (sym) < 0)
+ unsigned_enum = 0;
+ add_symbol_to_list (sym, list_in_scope);
}
/* Now create the vector of fields, and record how big it is. This is
- where we reverse the order, by pulling the members of the list in
- reverse order from how they were inserted. If we have no fields
- (this is apparently possible in C++) then skip building a field
- vector. */
+ where we reverse the order, by pulling the members off the list in
+ reverse order from how they were inserted. If we have no fields
+ (this is apparently possible in C++) then skip building a field
+ vector. */
if (nfields > 0)
{
+ if (unsigned_enum)
+ TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED;
TYPE_NFIELDS (type) = nfields;
TYPE_FIELDS (type) = (struct field *)
- obstack_alloc (symbol_obstack, sizeof (struct field) * nfields);
+ obstack_alloc (&objfile->symbol_obstack, sizeof (struct field) * nfields);
/* Copy the saved-up fields into the field vector. */
- for (n = 0; (n < nfields) && (list != NULL); list = list -> next)
+ for (n = 0; (n < nfields) && (list != NULL); list = list->next)
{
- TYPE_FIELD (type, n++) = list -> field;
- }
+ TYPE_FIELD (type, n++) = list->field;
+ }
}
}
return (type);
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- read_func_scope -- process all dies within a function scope
+ read_func_scope -- process all dies within a function scope
-DESCRIPTION
+ DESCRIPTION
- Process all dies within a given function scope. We are passed
- a die information structure pointer DIP for the die which
- starts the function scope, and pointers into the raw die data
- that define the dies within the function scope.
-
- For now, we ignore lexical block scopes within the function.
- The problem is that AT&T cc does not define a DWARF lexical
- block scope for the function itself, while gcc defines a
- lexical block scope for the function. We need to think about
- how to handle this difference, or if it is even a problem.
- (FIXME)
+ Process all dies within a given function scope. We are passed
+ a die information structure pointer DIP for the die which
+ starts the function scope, and pointers into the raw die data
+ that define the dies within the function scope.
+
+ For now, we ignore lexical block scopes within the function.
+ The problem is that AT&T cc does not define a DWARF lexical
+ block scope for the function itself, while gcc defines a
+ lexical block scope for the function. We need to think about
+ how to handle this difference, or if it is even a problem.
+ (FIXME)
*/
static void
-DEFUN(read_func_scope, (dip, thisdie, enddie, objfile),
- struct dieinfo *dip AND
- char *thisdie AND
- char *enddie AND
- struct objfile *objfile)
+read_func_scope (dip, thisdie, enddie, objfile)
+ struct dieinfo *dip;
+ char *thisdie;
+ char *enddie;
+ struct objfile *objfile;
{
- struct symbol *sym;
-
- if (entry_point >= dip -> at_low_pc && entry_point < dip -> at_high_pc)
+ register struct context_stack *new;
+
+ /* AT_name is absent if the function is described with an
+ AT_abstract_origin tag.
+ Ignore the function description for now to avoid GDB core dumps.
+ FIXME: Add code to handle AT_abstract_origin tags properly. */
+ if (dip->at_name == NULL)
+ {
+ complain (&missing_at_name, DIE_ID);
+ return;
+ }
+
+ if (objfile->ei.entry_point >= dip->at_low_pc &&
+ objfile->ei.entry_point < dip->at_high_pc)
{
- entry_scope_lowpc = dip -> at_low_pc;
- entry_scope_highpc = dip -> at_high_pc;
+ objfile->ei.entry_func_lowpc = dip->at_low_pc;
+ objfile->ei.entry_func_highpc = dip->at_high_pc;
}
- if (strcmp (dip -> at_name, "main") == 0) /* FIXME: hardwired name */
+ if (STREQ (dip->at_name, "main")) /* FIXME: hardwired name */
{
- main_scope_lowpc = dip -> at_low_pc;
- main_scope_highpc = dip -> at_high_pc;
+ objfile->ei.main_func_lowpc = dip->at_low_pc;
+ objfile->ei.main_func_highpc = dip->at_high_pc;
}
- sym = new_symbol (dip);
- openscope (sym, dip -> at_low_pc, dip -> at_high_pc);
- process_dies (thisdie + dip -> dielength, enddie, objfile);
- closescope ();
+ new = push_context (0, dip->at_low_pc);
+ new->name = new_symbol (dip, objfile);
+ list_in_scope = &local_symbols;
+ process_dies (thisdie + dip->die_length, enddie, objfile);
+ new = pop_context ();
+ /* Make a block for the local symbols within. */
+ finish_block (new->name, &local_symbols, new->old_blocks,
+ new->start_addr, dip->at_high_pc, objfile);
+ list_in_scope = &file_symbols;
}
+
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- read_file_scope -- process all dies within a file scope
+ handle_producer -- process the AT_producer attribute
-DESCRIPTION
+ DESCRIPTION
+
+ Perform any operations that depend on finding a particular
+ AT_producer attribute.
- Process all dies within a given file scope. We are passed a
- pointer to the die information structure for the die which
- starts the file scope, and pointers into the raw die data which
- mark the range of dies within the file scope.
-
- When the partial symbol table is built, the file offset for the line
- number table for each compilation unit is saved in the partial symbol
- table entry for that compilation unit. As the symbols for each
- compilation unit are read, the line number table is read into memory
- and the variable lnbase is set to point to it. Thus all we have to
- do is use lnbase to access the line number table for the current
- compilation unit.
*/
static void
-DEFUN(read_file_scope, (dip, thisdie, enddie, objfile),
- struct dieinfo *dip AND
- char *thisdie AND
- char *enddie AND
- struct objfile *objfile)
+handle_producer (producer)
+ char *producer;
{
- struct cleanup *back_to;
-
- if (entry_point >= dip -> at_low_pc && entry_point < dip -> at_high_pc)
+
+ /* If this compilation unit was compiled with g++ or gcc, then set the
+ processing_gcc_compilation flag. */
+
+ if (STREQN (producer, GCC_PRODUCER, strlen (GCC_PRODUCER)))
{
- startup_file_start = dip -> at_low_pc;
- startup_file_end = dip -> at_high_pc;
+ char version = producer[strlen (GCC_PRODUCER)];
+ processing_gcc_compilation = (version == '2' ? 2 : 1);
+ }
+ else
+ {
+ processing_gcc_compilation =
+ STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER))
+ || STREQN (producer, CHILL_PRODUCER, strlen (CHILL_PRODUCER));
}
- numutypes = (enddie - thisdie) / 4;
- utypes = (struct type **) xmalloc (numutypes * sizeof (struct type *));
- back_to = make_cleanup (free, utypes);
- (void) memset (utypes, 0, numutypes * sizeof (struct type *));
- start_symtab ();
- openscope (NULL, dip -> at_low_pc, dip -> at_high_pc);
- decode_line_numbers (lnbase);
- process_dies (thisdie + dip -> dielength, enddie, objfile);
- closescope ();
- end_symtab (dip -> at_name, dip -> at_language, objfile);
- do_cleanups (back_to);
- utypes = NULL;
- numutypes = 0;
-}
-/*
+ /* Select a demangling style if we can identify the producer and if
+ the current style is auto. We leave the current style alone if it
+ is not auto. We also leave the demangling style alone if we find a
+ gcc (cc1) producer, as opposed to a g++ (cc1plus) producer. */
+
+ if (AUTO_DEMANGLING)
+ {
+ if (STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER)))
+ {
+ set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
+ }
+ else if (STREQN (producer, LCC_PRODUCER, strlen (LCC_PRODUCER)))
+ {
+ set_demangling_style (LUCID_DEMANGLING_STYLE_STRING);
+ }
+ }
+}
-LOCAL FUNCTION
- start_symtab -- do initialization for starting new symbol table
+/*
-SYNOPSIS
+ LOCAL FUNCTION
- static void start_symtab (void)
+ read_file_scope -- process all dies within a file scope
-DESCRIPTION
+ DESCRIPTION
- Called whenever we are starting to process dies for a new
- compilation unit, to perform initializations. Right now
- the only thing we really have to do is initialize storage
- space for the line number vector.
+ Process all dies within a given file scope. We are passed a
+ pointer to the die information structure for the die which
+ starts the file scope, and pointers into the raw die data which
+ mark the range of dies within the file scope.
+ When the partial symbol table is built, the file offset for the line
+ number table for each compilation unit is saved in the partial symbol
+ table entry for that compilation unit. As the symbols for each
+ compilation unit are read, the line number table is read into memory
+ and the variable lnbase is set to point to it. Thus all we have to
+ do is use lnbase to access the line number table for the current
+ compilation unit.
*/
static void
-DEFUN_VOID (start_symtab)
+read_file_scope (dip, thisdie, enddie, objfile)
+ struct dieinfo *dip;
+ char *thisdie;
+ char *enddie;
+ struct objfile *objfile;
{
- int nbytes;
+ struct cleanup *back_to;
+ struct symtab *symtab;
+
+ if (objfile->ei.entry_point >= dip->at_low_pc &&
+ objfile->ei.entry_point < dip->at_high_pc)
+ {
+ objfile->ei.entry_file_lowpc = dip->at_low_pc;
+ objfile->ei.entry_file_highpc = dip->at_high_pc;
+ }
+ set_cu_language (dip);
+ if (dip->at_producer != NULL)
+ {
+ handle_producer (dip->at_producer);
+ }
+ numutypes = (enddie - thisdie) / 4;
+ utypes = (struct type **) xmalloc (numutypes * sizeof (struct type *));
+ back_to = make_cleanup (free_utypes, NULL);
+ memset (utypes, 0, numutypes * sizeof (struct type *));
+ memset (ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *));
+ start_symtab (dip->at_name, dip->at_comp_dir, dip->at_low_pc);
+ record_debugformat ("DWARF 1");
+ decode_line_numbers (lnbase);
+ process_dies (thisdie + dip->die_length, enddie, objfile);
- line_vector_index = 0;
- line_vector_length = 1000;
- nbytes = sizeof (struct linetable);
- nbytes += line_vector_length * sizeof (struct linetable_entry);
- line_vector = (struct linetable *) xmalloc (nbytes);
+ symtab = end_symtab (dip->at_high_pc, objfile, 0);
+ if (symtab != NULL)
+ {
+ symtab->language = cu_language;
+ }
+ do_cleanups (back_to);
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- process_dies -- process a range of DWARF Information Entries
+ process_dies -- process a range of DWARF Information Entries
-SYNOPSIS
+ SYNOPSIS
- static void process_dies (char *thisdie, char *enddie,
- struct objfile *objfile)
+ static void process_dies (char *thisdie, char *enddie,
+ struct objfile *objfile)
-DESCRIPTION
+ DESCRIPTION
- Process all DIE's in a specified range. May be (and almost
- certainly will be) called recursively.
+ Process all DIE's in a specified range. May be (and almost
+ certainly will be) called recursively.
*/
static void
-DEFUN(process_dies, (thisdie, enddie, objfile),
- char *thisdie AND char *enddie AND struct objfile *objfile)
+process_dies (thisdie, enddie, objfile)
+ char *thisdie;
+ char *enddie;
+ struct objfile *objfile;
{
char *nextdie;
struct dieinfo di;
-
+
while (thisdie < enddie)
{
- basicdieinfo (&di, thisdie);
- if (di.dielength < sizeof (long))
+ basicdieinfo (&di, thisdie, objfile);
+ if (di.die_length < SIZEOF_DIE_LENGTH)
{
break;
}
- else if (di.dietag == TAG_padding)
+ else if (di.die_tag == TAG_padding)
{
- nextdie = thisdie + di.dielength;
+ nextdie = thisdie + di.die_length;
}
else
{
- completedieinfo (&di);
+ completedieinfo (&di, objfile);
if (di.at_sibling != 0)
{
nextdie = dbbase + di.at_sibling - dbroff;
}
else
{
- nextdie = thisdie + di.dielength;
+ nextdie = thisdie + di.die_length;
}
- switch (di.dietag)
+#ifdef SMASH_TEXT_ADDRESS
+ /* I think that these are always text, not data, addresses. */
+ SMASH_TEXT_ADDRESS (di.at_low_pc);
+ SMASH_TEXT_ADDRESS (di.at_high_pc);
+#endif
+ switch (di.die_tag)
{
case TAG_compile_unit:
- read_file_scope (&di, thisdie, nextdie, objfile);
+ /* Skip Tag_compile_unit if we are already inside a compilation
+ unit, we are unable to handle nested compilation units
+ properly (FIXME). */
+ if (current_subfile == NULL)
+ read_file_scope (&di, thisdie, nextdie, objfile);
+ else
+ nextdie = thisdie + di.die_length;
break;
case TAG_global_subroutine:
case TAG_subroutine:
case TAG_lexical_block:
read_lexical_block_scope (&di, thisdie, nextdie, objfile);
break;
+ case TAG_class_type:
case TAG_structure_type:
case TAG_union_type:
read_structure_scope (&di, thisdie, nextdie, objfile);
break;
case TAG_enumeration_type:
- read_enumeration (&di, thisdie, nextdie);
+ read_enumeration (&di, thisdie, nextdie, objfile);
break;
case TAG_subroutine_type:
read_subroutine_type (&di, thisdie, nextdie);
break;
case TAG_array_type:
- read_array_type (&di);
+ dwarf_read_array_type (&di);
+ break;
+ case TAG_pointer_type:
+ read_tag_pointer_type (&di);
+ break;
+ case TAG_string_type:
+ read_tag_string_type (&di);
break;
default:
- (void) new_symbol (&di);
+ new_symbol (&di, objfile);
break;
}
}
/*
-LOCAL FUNCTION
-
- end_symtab -- finish processing for a compilation unit
-
-SYNOPSIS
+ LOCAL FUNCTION
- static void end_symtab (char *filename, long language)
+ decode_line_numbers -- decode a line number table fragment
-DESCRIPTION
+ SYNOPSIS
- Complete the symbol table entry for the current compilation
- unit. Make the struct symtab and put it on the list of all
- such symtabs.
+ static void decode_line_numbers (char *tblscan, char *tblend,
+ long length, long base, long line, long pc)
- */
+ DESCRIPTION
-static void
-DEFUN(end_symtab, (filename, language, objfile),
- char *filename AND long language AND struct objfile *objfile)
-{
- struct symtab *symtab;
- struct blockvector *blockvector;
- int nbytes;
-
- /* Ignore a file that has no functions with real debugging info. */
- if (global_symbols == NULL && scopetree -> block == NULL)
- {
- free (line_vector);
- line_vector = NULL;
- line_vector_length = -1;
- freescope (scopetree);
- scope = scopetree = NULL;
- }
-
- /* Create the blockvector that points to all the file's blocks. */
-
- blockvector = make_blockvector ();
-
- /* Now create the symtab object for this source file. */
-
- symtab = allocate_symtab (savestring (filename, strlen (filename)),
- objfile);
-
- symtab -> free_ptr = 0;
-
- /* Fill in its components. */
- symtab -> blockvector = blockvector;
- symtab -> free_code = free_linetable;
-
- /* Save the line number information. */
-
- line_vector -> nitems = line_vector_index;
- nbytes = sizeof (struct linetable);
- if (line_vector_index > 1)
- {
- nbytes += (line_vector_index - 1) * sizeof (struct linetable_entry);
- }
- symtab -> linetable = (struct linetable *) xrealloc (line_vector, nbytes);
-
- /* FIXME: The following may need to be expanded for other languages */
- switch (language)
- {
- case LANG_C89:
- case LANG_C:
- symtab -> language = language_c;
- break;
- case LANG_C_PLUS_PLUS:
- symtab -> language = language_cplus;
- break;
- default:
- ;
- }
-
- /* Link the new symtab into the list of such. */
- symtab -> next = symtab_list;
- symtab_list = symtab;
-
- /* Recursively free the scope tree */
- freescope (scopetree);
- scope = scopetree = NULL;
-
- /* Reinitialize for beginning of new file. */
- line_vector = 0;
- line_vector_length = -1;
-}
+ Translate the DWARF line number information to gdb form.
-/*
+ The ".line" section contains one or more line number tables, one for
+ each ".line" section from the objects that were linked.
-LOCAL FUNCTION
+ The AT_stmt_list attribute for each TAG_source_file entry in the
+ ".debug" section contains the offset into the ".line" section for the
+ start of the table for that file.
- scopecount -- count the number of enclosed scopes
+ The table itself has the following structure:
-SYNOPSIS
+ <table length><base address><source statement entry>
+ 4 bytes 4 bytes 10 bytes
- static int scopecount (struct scopenode *node)
+ The table length is the total size of the table, including the 4 bytes
+ for the length information.
-DESCRIPTION
+ The base address is the address of the first instruction generated
+ for the source file.
- Given pointer to a node, compute the size of the subtree which is
- rooted in this node, which also happens to be the number of scopes
- to the subtree.
- */
+ Each source statement entry has the following structure:
-static int
-DEFUN(scopecount, (node), struct scopenode *node)
-{
- int count = 0;
-
- if (node != NULL)
- {
- count += scopecount (node -> child);
- count += scopecount (node -> sibling);
- count++;
- }
- return (count);
-}
+ <line number><statement position><address delta>
+ 4 bytes 2 bytes 4 bytes
-/*
+ The line number is relative to the start of the file, starting with
+ line 1.
-LOCAL FUNCTION
+ The statement position either -1 (0xFFFF) or the number of characters
+ from the beginning of the line to the beginning of the statement.
- openscope -- start a new lexical block scope
+ The address delta is the difference between the base address and
+ the address of the first instruction for the statement.
-SYNOPSIS
+ Note that we must copy the bytes from the packed table to our local
+ variables before attempting to use them, to avoid alignment problems
+ on some machines, particularly RISC processors.
- static void openscope (struct symbol *namesym, CORE_ADDR lowpc,
- CORE_ADDR highpc)
+ BUGS
-DESCRIPTION
+ Does gdb expect the line numbers to be sorted? They are now by
+ chance/luck, but are not required to be. (FIXME)
- Start a new scope by allocating a new scopenode, adding it as the
- next child of the current scope (if any) or as the root of the
- scope tree, and then making the new node the current scope node.
+ The line with number 0 is unused, gdb apparently can discover the
+ span of the last line some other way. How? (FIXME)
*/
static void
-DEFUN(openscope, (namesym, lowpc, highpc),
- struct symbol *namesym AND
- CORE_ADDR lowpc AND
- CORE_ADDR highpc)
+decode_line_numbers (linetable)
+ char *linetable;
{
- struct scopenode *new;
- struct scopenode *child;
-
- new = (struct scopenode *) xmalloc (sizeof (*new));
- (void) memset (new, 0, sizeof (*new));
- new -> namesym = namesym;
- new -> lowpc = lowpc;
- new -> highpc = highpc;
- if (scope == NULL)
- {
- scopetree = new;
- }
- else if ((child = scope -> child) == NULL)
+ char *tblscan;
+ char *tblend;
+ unsigned long length;
+ unsigned long base;
+ unsigned long line;
+ unsigned long pc;
+
+ if (linetable != NULL)
{
- scope -> child = new;
- new -> parent = scope;
+ tblscan = tblend = linetable;
+ length = target_to_host (tblscan, SIZEOF_LINETBL_LENGTH, GET_UNSIGNED,
+ current_objfile);
+ tblscan += SIZEOF_LINETBL_LENGTH;
+ tblend += length;
+ base = target_to_host (tblscan, TARGET_FT_POINTER_SIZE (objfile),
+ GET_UNSIGNED, current_objfile);
+ tblscan += TARGET_FT_POINTER_SIZE (objfile);
+ base += baseaddr;
+ while (tblscan < tblend)
+ {
+ line = target_to_host (tblscan, SIZEOF_LINETBL_LINENO, GET_UNSIGNED,
+ current_objfile);
+ tblscan += SIZEOF_LINETBL_LINENO + SIZEOF_LINETBL_STMT;
+ pc = target_to_host (tblscan, SIZEOF_LINETBL_DELTA, GET_UNSIGNED,
+ current_objfile);
+ tblscan += SIZEOF_LINETBL_DELTA;
+ pc += base;
+ if (line != 0)
+ {
+ record_line (current_subfile, line, pc);
+ }
+ }
}
- else
- {
- while (child -> sibling != NULL)
- {
- child = child -> sibling;
- }
- child -> sibling = new;
- new -> parent = scope;
- }
- scope = new;
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- freescope -- free a scope tree rooted at the given node
+ locval -- compute the value of a location attribute
-SYNOPSIS
+ SYNOPSIS
- static void freescope (struct scopenode *node)
+ static int locval (struct dieinfo *dip)
-DESCRIPTION
-
- Given a pointer to a node in the scope tree, free the subtree
- rooted at that node. First free all the children and sibling
- nodes, and then the node itself. Used primarily for cleaning
- up after ourselves and returning memory to the system.
- */
-
-static void
-DEFUN(freescope, (node), struct scopenode *node)
-{
- if (node != NULL)
- {
- freescope (node -> child);
- freescope (node -> sibling);
- free (node);
- }
-}
-
-/*
-
-LOCAL FUNCTION
-
- buildblock -- build a new block from pending symbols list
-
-SYNOPSIS
-
- static struct block *buildblock (struct pending_symbol *syms)
-
-DESCRIPTION
+ DESCRIPTION
- Given a pointer to a list of symbols, build a new block and free
- the symbol list structure. Also check each symbol to see if it
- is the special symbol that flags that this block was compiled by
- gcc, and if so, mark the block appropriately.
- */
-
-static struct block *
-DEFUN(buildblock, (syms), struct pending_symbol *syms)
-{
- struct pending_symbol *next, *next1;
- int i;
- struct block *newblock;
- int nbytes;
-
- for (next = syms, i = 0 ; next ; next = next -> next, i++) {;}
-
- /* Allocate a new block */
-
- nbytes = sizeof (struct block);
- if (i > 1)
- {
- nbytes += (i - 1) * sizeof (struct symbol *);
- }
- newblock = (struct block *) obstack_alloc (symbol_obstack, nbytes);
- (void) memset (newblock, 0, nbytes);
-
- /* Copy the symbols into the block. */
-
- BLOCK_NSYMS (newblock) = i;
- for (next = syms ; next ; next = next -> next)
- {
- BLOCK_SYM (newblock, --i) = next -> symbol;
- if (STREQ (GCC_COMPILED_FLAG_SYMBOL, SYMBOL_NAME (next -> symbol)) ||
- STREQ (GCC2_COMPILED_FLAG_SYMBOL, SYMBOL_NAME (next -> symbol)))
- {
- BLOCK_GCC_COMPILED (newblock) = 1;
- }
- }
-
- /* Now free the links of the list, and empty the list. */
-
- for (next = syms ; next ; next = next1)
- {
- next1 = next -> next;
- free (next);
- }
-
- return (newblock);
-}
-
-/*
-
-LOCAL FUNCTION
+ Given pointer to a string of bytes that define a location, compute
+ the location and return the value.
+ A location description containing no atoms indicates that the
+ object is optimized out. The optimized_out flag is set for those,
+ the return value is meaningless.
- closescope -- close a lexical block scope
+ When computing values involving the current value of the frame pointer,
+ the value zero is used, which results in a value relative to the frame
+ pointer, rather than the absolute value. This is what GDB wants
+ anyway.
-SYNOPSIS
+ When the result is a register number, the isreg flag is set, otherwise
+ it is cleared. This is a kludge until we figure out a better
+ way to handle the problem. Gdb's design does not mesh well with the
+ DWARF notion of a location computing interpreter, which is a shame
+ because the flexibility goes unused.
- static void closescope (void)
+ NOTES
-DESCRIPTION
-
- Close the current lexical block scope. Closing the current scope
- is as simple as moving the current scope pointer up to the parent
- of the current scope pointer. But we also take this opportunity
- to build the block for the current scope first, since we now have
- all of it's symbols.
- */
-
-static void
-DEFUN_VOID(closescope)
-{
- struct scopenode *child;
-
- if (scope == NULL)
- {
- error ("DWARF parse error, too many close scopes");
- }
- else
- {
- if (scope -> parent == NULL)
- {
- global_symbol_block = buildblock (global_symbols);
- global_symbols = NULL;
- BLOCK_START (global_symbol_block) = scope -> lowpc + baseaddr;
- BLOCK_END (global_symbol_block) = scope -> highpc + baseaddr;
- }
- scope -> block = buildblock (scope -> symbols);
- scope -> symbols = NULL;
- BLOCK_START (scope -> block) = scope -> lowpc + baseaddr;
- BLOCK_END (scope -> block) = scope -> highpc + baseaddr;
-
- /* Put the local block in as the value of the symbol that names it. */
-
- if (scope -> namesym)
- {
- SYMBOL_BLOCK_VALUE (scope -> namesym) = scope -> block;
- BLOCK_FUNCTION (scope -> block) = scope -> namesym;
- }
-
- /* Install this scope's local block as the superblock of all child
- scope blocks. */
-
- for (child = scope -> child ; child ; child = child -> sibling)
- {
- BLOCK_SUPERBLOCK (child -> block) = scope -> block;
- }
-
- scope = scope -> parent;
- }
-}
-
-/*
-
-LOCAL FUNCTION
-
- record_line -- record a line number entry in the line vector
-
-SYNOPSIS
-
- static void record_line (int line, CORE_ADDR pc)
-
-DESCRIPTION
-
- Given a line number and the corresponding pc value, record
- this pair in the line number vector, expanding the vector as
- necessary.
- */
-
-static void
-DEFUN(record_line, (line, pc), int line AND CORE_ADDR pc)
-{
- struct linetable_entry *e;
- int nbytes;
-
- /* Make sure line vector is big enough. */
-
- if (line_vector_index + 2 >= line_vector_length)
- {
- line_vector_length *= 2;
- nbytes = sizeof (struct linetable);
- nbytes += (line_vector_length * sizeof (struct linetable_entry));
- line_vector = (struct linetable *) xrealloc (line_vector, nbytes);
- }
- e = line_vector -> item + line_vector_index++;
- e -> line = line;
- e -> pc = pc;
-}
-
-/*
-
-LOCAL FUNCTION
-
- decode_line_numbers -- decode a line number table fragment
-
-SYNOPSIS
-
- static void decode_line_numbers (char *tblscan, char *tblend,
- long length, long base, long line, long pc)
-
-DESCRIPTION
-
- Translate the DWARF line number information to gdb form.
-
- The ".line" section contains one or more line number tables, one for
- each ".line" section from the objects that were linked.
-
- The AT_stmt_list attribute for each TAG_source_file entry in the
- ".debug" section contains the offset into the ".line" section for the
- start of the table for that file.
-
- The table itself has the following structure:
-
- <table length><base address><source statement entry>
- 4 bytes 4 bytes 10 bytes
-
- The table length is the total size of the table, including the 4 bytes
- for the length information.
-
- The base address is the address of the first instruction generated
- for the source file.
-
- Each source statement entry has the following structure:
-
- <line number><statement position><address delta>
- 4 bytes 2 bytes 4 bytes
-
- The line number is relative to the start of the file, starting with
- line 1.
-
- The statement position either -1 (0xFFFF) or the number of characters
- from the beginning of the line to the beginning of the statement.
-
- The address delta is the difference between the base address and
- the address of the first instruction for the statement.
-
- Note that we must copy the bytes from the packed table to our local
- variables before attempting to use them, to avoid alignment problems
- on some machines, particularly RISC processors.
-
-BUGS
-
- Does gdb expect the line numbers to be sorted? They are now by
- chance/luck, but are not required to be. (FIXME)
-
- The line with number 0 is unused, gdb apparently can discover the
- span of the last line some other way. How? (FIXME)
- */
-
-static void
-DEFUN(decode_line_numbers, (linetable), char *linetable)
-{
- char *tblscan;
- char *tblend;
- long length;
- long base;
- long line;
- long pc;
-
- if (linetable != NULL)
- {
- tblscan = tblend = linetable;
- (void) memcpy (&length, tblscan, sizeof (long));
- tblscan += sizeof (long);
- tblend += length;
- (void) memcpy (&base, tblscan, sizeof (long));
- base += baseaddr;
- tblscan += sizeof (long);
- while (tblscan < tblend)
- {
- (void) memcpy (&line, tblscan, sizeof (long));
- tblscan += sizeof (long) + sizeof (short);
- (void) memcpy (&pc, tblscan, sizeof (long));
- tblscan += sizeof (long);
- pc += base;
- if (line > 0)
- {
- record_line (line, pc);
- }
- }
- }
-}
-
-/*
-
-LOCAL FUNCTION
-
- add_symbol_to_list -- add a symbol to head of current symbol list
-
-SYNOPSIS
-
- static void add_symbol_to_list (struct symbol *symbol, struct
- pending_symbol **listhead)
-
-DESCRIPTION
-
- Given a pointer to a symbol and a pointer to a pointer to a
- list of symbols, add this symbol as the current head of the
- list. Typically used for example to add a symbol to the
- symbol list for the current scope.
-
- */
-
-static void
-DEFUN(add_symbol_to_list, (symbol, listhead),
- struct symbol *symbol AND struct pending_symbol **listhead)
-{
- struct pending_symbol *link;
-
- if (symbol != NULL)
- {
- link = (struct pending_symbol *) xmalloc (sizeof (*link));
- link -> next = *listhead;
- link -> symbol = symbol;
- *listhead = link;
- }
-}
-
-/*
-
-LOCAL FUNCTION
-
- gatherblocks -- walk a scope tree and build block vectors
-
-SYNOPSIS
-
- static struct block **gatherblocks (struct block **dest,
- struct scopenode *node)
-
-DESCRIPTION
-
- Recursively walk a scope tree rooted in the given node, adding blocks
- to the array pointed to by DEST, in preorder. I.E., first we add the
- block for the current scope, then all the blocks for child scopes,
- and finally all the blocks for sibling scopes.
- */
-
-static struct block **
-DEFUN(gatherblocks, (dest, node),
- struct block **dest AND struct scopenode *node)
-{
- if (node != NULL)
- {
- *dest++ = node -> block;
- dest = gatherblocks (dest, node -> child);
- dest = gatherblocks (dest, node -> sibling);
- }
- return (dest);
-}
-
-/*
-
-LOCAL FUNCTION
-
- make_blockvector -- make a block vector from current scope tree
-
-SYNOPSIS
-
- static struct blockvector *make_blockvector (void)
-
-DESCRIPTION
-
- Make a blockvector from all the blocks in the current scope tree.
- The first block is always the global symbol block, followed by the
- block for the root of the scope tree which is the local symbol block,
- followed by all the remaining blocks in the scope tree, which are all
- local scope blocks.
-
-NOTES
-
- Note that since the root node of the scope tree is created at the time
- each file scope is entered, there are always at least two blocks,
- neither of which may have any symbols, but always contribute a block
- to the block vector. So the test for number of blocks greater than 1
- below is unnecessary given bug free code.
-
- The resulting block structure varies slightly from that produced
- by dbxread.c, in that block 0 and block 1 are sibling blocks while
- with dbxread.c, block 1 is a child of block 0. This does not
- seem to cause any problems, but probably should be fixed. (FIXME)
- */
-
-static struct blockvector *
-DEFUN_VOID(make_blockvector)
-{
- struct blockvector *blockvector = NULL;
- int i;
- int nbytes;
-
- /* Recursively walk down the tree, counting the number of blocks.
- Then add one to account for the global's symbol block */
-
- i = scopecount (scopetree) + 1;
- nbytes = sizeof (struct blockvector);
- if (i > 1)
- {
- nbytes += (i - 1) * sizeof (struct block *);
- }
- blockvector = (struct blockvector *)
- obstack_alloc (symbol_obstack, nbytes);
-
- /* Copy the blocks into the blockvector. */
-
- BLOCKVECTOR_NBLOCKS (blockvector) = i;
- BLOCKVECTOR_BLOCK (blockvector, 0) = global_symbol_block;
- gatherblocks (&BLOCKVECTOR_BLOCK (blockvector, 1), scopetree);
-
- return (blockvector);
-}
-
-/*
-
-LOCAL FUNCTION
-
- locval -- compute the value of a location attribute
-
-SYNOPSIS
-
- static int locval (char *loc)
-
-DESCRIPTION
-
- Given pointer to a string of bytes that define a location, compute
- the location and return the value.
-
- When computing values involving the current value of the frame pointer,
- the value zero is used, which results in a value relative to the frame
- pointer, rather than the absolute value. This is what GDB wants
- anyway.
-
- When the result is a register number, the global isreg flag is set,
- otherwise it is cleared. This is a kludge until we figure out a better
- way to handle the problem. Gdb's design does not mesh well with the
- DWARF notion of a location computing interpreter, which is a shame
- because the flexibility goes unused.
-
-NOTES
-
- Note that stack[0] is unused except as a default error return.
- Note that stack overflow is not yet handled.
+ Note that stack[0] is unused except as a default error return.
+ Note that stack overflow is not yet handled.
*/
static int
-DEFUN(locval, (loc), char *loc)
+locval (dip)
+ struct dieinfo *dip;
{
unsigned short nbytes;
- auto int stack[64];
+ unsigned short locsize;
+ auto long stack[64];
int stacki;
+ char *loc;
char *end;
- long regno;
-
- (void) memcpy (&nbytes, loc, sizeof (short));
- end = loc + sizeof (short) + nbytes;
+ int loc_atom_code;
+ int loc_value_size;
+
+ loc = dip->at_location;
+ nbytes = attribute_size (AT_location);
+ locsize = target_to_host (loc, nbytes, GET_UNSIGNED, current_objfile);
+ loc += nbytes;
+ end = loc + locsize;
stacki = 0;
stack[stacki] = 0;
- isreg = 0;
- for (loc += sizeof (short); loc < end; loc += sizeof (long))
- {
- switch (*loc++) {
- case 0:
- /* error */
- loc = end;
- break;
- case OP_REG:
- /* push register (number) */
- (void) memcpy (&stack[++stacki], loc, sizeof (long));
- isreg = 1;
- break;
- case OP_BASEREG:
- /* push value of register (number) */
- /* Actually, we compute the value as if register has 0 */
- (void) memcpy (®no, loc, sizeof (long));
- if (regno == R_FP)
- {
- stack[++stacki] = 0;
- }
- else
- {
- stack[++stacki] = 0;
- SQUAWK (("BASEREG %d not handled!", regno));
- }
- break;
- case OP_ADDR:
- /* push address (relocated address) */
- (void) memcpy (&stack[++stacki], loc, sizeof (long));
- break;
- case OP_CONST:
- /* push constant (number) */
- (void) memcpy (&stack[++stacki], loc, sizeof (long));
- break;
- case OP_DEREF2:
- /* pop, deref and push 2 bytes (as a long) */
- SQUAWK (("OP_DEREF2 address %#x not handled", stack[stacki]));
- break;
- case OP_DEREF4: /* pop, deref and push 4 bytes (as a long) */
- SQUAWK (("OP_DEREF4 address %#x not handled", stack[stacki]));
- break;
- case OP_ADD: /* pop top 2 items, add, push result */
- stack[stacki - 1] += stack[stacki];
- stacki--;
- break;
- }
+ dip->isreg = 0;
+ dip->offreg = 0;
+ dip->optimized_out = 1;
+ loc_value_size = TARGET_FT_LONG_SIZE (current_objfile);
+ while (loc < end)
+ {
+ dip->optimized_out = 0;
+ loc_atom_code = target_to_host (loc, SIZEOF_LOC_ATOM_CODE, GET_UNSIGNED,
+ current_objfile);
+ loc += SIZEOF_LOC_ATOM_CODE;
+ switch (loc_atom_code)
+ {
+ case 0:
+ /* error */
+ loc = end;
+ break;
+ case OP_REG:
+ /* push register (number) */
+ stack[++stacki]
+ = DWARF_REG_TO_REGNUM (target_to_host (loc, loc_value_size,
+ GET_UNSIGNED,
+ current_objfile));
+ loc += loc_value_size;
+ dip->isreg = 1;
+ break;
+ case OP_BASEREG:
+ /* push value of register (number) */
+ /* Actually, we compute the value as if register has 0, so the
+ value ends up being the offset from that register. */
+ dip->offreg = 1;
+ dip->basereg = target_to_host (loc, loc_value_size, GET_UNSIGNED,
+ current_objfile);
+ loc += loc_value_size;
+ stack[++stacki] = 0;
+ break;
+ case OP_ADDR:
+ /* push address (relocated address) */
+ stack[++stacki] = target_to_host (loc, loc_value_size,
+ GET_UNSIGNED, current_objfile);
+ loc += loc_value_size;
+ break;
+ case OP_CONST:
+ /* push constant (number) FIXME: signed or unsigned! */
+ stack[++stacki] = target_to_host (loc, loc_value_size,
+ GET_SIGNED, current_objfile);
+ loc += loc_value_size;
+ break;
+ case OP_DEREF2:
+ /* pop, deref and push 2 bytes (as a long) */
+ complain (&op_deref2, DIE_ID, DIE_NAME, stack[stacki]);
+ break;
+ case OP_DEREF4: /* pop, deref and push 4 bytes (as a long) */
+ complain (&op_deref4, DIE_ID, DIE_NAME, stack[stacki]);
+ break;
+ case OP_ADD: /* pop top 2 items, add, push result */
+ stack[stacki - 1] += stack[stacki];
+ stacki--;
+ break;
+ }
}
return (stack[stacki]);
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- read_ofile_symtab -- build a full symtab entry from chunk of DIE's
+ read_ofile_symtab -- build a full symtab entry from chunk of DIE's
-SYNOPSIS
+ SYNOPSIS
- static struct symtab *read_ofile_symtab (struct partial_symtab *pst)
+ static void read_ofile_symtab (struct partial_symtab *pst)
-DESCRIPTION
+ DESCRIPTION
+ When expanding a partial symbol table entry to a full symbol table
+ entry, this is the function that gets called to read in the symbols
+ for the compilation unit. A pointer to the newly constructed symtab,
+ which is now the new first one on the objfile's symtab list, is
+ stashed in the partial symbol table entry.
*/
-static struct symtab *
-DEFUN(read_ofile_symtab, (pst),
- struct partial_symtab *pst)
+static void
+read_ofile_symtab (pst)
+ struct partial_symtab *pst;
{
struct cleanup *back_to;
- long lnsize;
- int foffset;
- bfd *abfd = pst->objfile->obfd;
-
+ unsigned long lnsize;
+ file_ptr foffset;
+ bfd *abfd;
+ char lnsizedata[SIZEOF_LINETBL_LENGTH];
+
+ abfd = pst->objfile->obfd;
+ current_objfile = pst->objfile;
+
/* Allocate a buffer for the entire chunk of DIE's for this compilation
unit, seek to the location in the file, and read in all the DIE's. */
diecount = 0;
- dbbase = xmalloc (DBLENGTH(pst));
- dbroff = DBROFF(pst);
- foffset = DBFOFF(pst) + dbroff;
- baseaddr = pst -> addr;
- if (bfd_seek (abfd, foffset, 0) ||
- (bfd_read (dbbase, DBLENGTH(pst), 1, abfd) != DBLENGTH(pst)))
+ dbsize = DBLENGTH (pst);
+ dbbase = xmalloc (dbsize);
+ dbroff = DBROFF (pst);
+ foffset = DBFOFF (pst) + dbroff;
+ base_section_offsets = pst->section_offsets;
+ baseaddr = ANOFFSET (pst->section_offsets, 0);
+ if (bfd_seek (abfd, foffset, SEEK_SET) ||
+ (bfd_read (dbbase, dbsize, 1, abfd) != dbsize))
{
free (dbbase);
error ("can't read DWARF data");
back_to = make_cleanup (free, dbbase);
/* If there is a line number table associated with this compilation unit
- then read the first long word from the line number table fragment, which
- contains the size of the fragment in bytes (including the long word
- itself). Allocate a buffer for the fragment and read it in for future
+ then read the size of this fragment in bytes, from the fragment itself.
+ Allocate a buffer for the fragment and read it in for future
processing. */
lnbase = NULL;
if (LNFOFF (pst))
{
- if (bfd_seek (abfd, LNFOFF (pst), 0) ||
- (bfd_read (&lnsize, sizeof(long), 1, abfd) != sizeof(long)))
+ if (bfd_seek (abfd, LNFOFF (pst), SEEK_SET) ||
+ (bfd_read ((PTR) lnsizedata, sizeof (lnsizedata), 1, abfd) !=
+ sizeof (lnsizedata)))
{
error ("can't read DWARF line number table size");
}
+ lnsize = target_to_host (lnsizedata, SIZEOF_LINETBL_LENGTH,
+ GET_UNSIGNED, pst->objfile);
lnbase = xmalloc (lnsize);
- if (bfd_seek (abfd, LNFOFF (pst), 0) ||
+ if (bfd_seek (abfd, LNFOFF (pst), SEEK_SET) ||
(bfd_read (lnbase, lnsize, 1, abfd) != lnsize))
{
free (lnbase);
make_cleanup (free, lnbase);
}
- process_dies (dbbase, dbbase + DBLENGTH(pst), pst -> objfile);
+ process_dies (dbbase, dbbase + dbsize, pst->objfile);
do_cleanups (back_to);
- return (symtab_list);
+ current_objfile = NULL;
+ pst->symtab = pst->objfile->symtabs;
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- psymtab_to_symtab_1 -- do grunt work for building a full symtab entry
+ psymtab_to_symtab_1 -- do grunt work for building a full symtab entry
-SYNOPSIS
+ SYNOPSIS
- static void psymtab_to_symtab_1 (struct partial_symtab *pst)
+ static void psymtab_to_symtab_1 (struct partial_symtab *pst)
-DESCRIPTION
+ DESCRIPTION
- Called once for each partial symbol table entry that needs to be
- expanded into a full symbol table entry.
+ Called once for each partial symbol table entry that needs to be
+ expanded into a full symbol table entry.
-*/
+ */
static void
-DEFUN(psymtab_to_symtab_1,
- (pst),
- struct partial_symtab *pst)
+psymtab_to_symtab_1 (pst)
+ struct partial_symtab *pst;
{
int i;
-
- if (!pst)
- {
- return;
- }
- if (pst->readin)
+ struct cleanup *old_chain;
+
+ if (pst != NULL)
{
- fprintf (stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
- pst -> filename);
- return;
- }
-
- /* Read in all partial symtabs on which this one is dependent */
- for (i = 0; i < pst -> number_of_dependencies; i++)
- if (!pst -> dependencies[i] -> readin)
- {
- /* Inform about additional files that need to be read in. */
- if (info_verbose)
- {
- fputs_filtered (" ", stdout);
- wrap_here ("");
- fputs_filtered ("and ", stdout);
- wrap_here ("");
- printf_filtered ("%s...", pst -> dependencies[i] -> filename);
- wrap_here (""); /* Flush output */
- fflush (stdout);
- }
- psymtab_to_symtab_1 (pst -> dependencies[i]);
- }
-
- if (DBLENGTH(pst)) /* Otherwise it's a dummy */
- {
- pst -> symtab = read_ofile_symtab (pst);
- if (info_verbose)
+ if (pst->readin)
+ {
+ warning ("psymtab for %s already read in. Shouldn't happen.",
+ pst->filename);
+ }
+ else
{
- printf_filtered ("%d DIE's, sorting...", diecount);
- fflush (stdout);
+ /* Read in all partial symtabs on which this one is dependent */
+ for (i = 0; i < pst->number_of_dependencies; i++)
+ {
+ if (!pst->dependencies[i]->readin)
+ {
+ /* Inform about additional files that need to be read in. */
+ if (info_verbose)
+ {
+ fputs_filtered (" ", gdb_stdout);
+ wrap_here ("");
+ fputs_filtered ("and ", gdb_stdout);
+ wrap_here ("");
+ printf_filtered ("%s...",
+ pst->dependencies[i]->filename);
+ wrap_here ("");
+ gdb_flush (gdb_stdout); /* Flush output */
+ }
+ psymtab_to_symtab_1 (pst->dependencies[i]);
+ }
+ }
+ if (DBLENGTH (pst)) /* Otherwise it's a dummy */
+ {
+ buildsym_init ();
+ old_chain = make_cleanup (really_free_pendings, 0);
+ read_ofile_symtab (pst);
+ if (info_verbose)
+ {
+ printf_filtered ("%d DIE's, sorting...", diecount);
+ wrap_here ("");
+ gdb_flush (gdb_stdout);
+ }
+ sort_symtab_syms (pst->symtab);
+ do_cleanups (old_chain);
+ }
+ pst->readin = 1;
}
- sort_symtab_syms (pst -> symtab);
}
- pst -> readin = 1;
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- dwarf_psymtab_to_symtab -- build a full symtab entry from partial one
+ dwarf_psymtab_to_symtab -- build a full symtab entry from partial one
-SYNOPSIS
+ SYNOPSIS
- static void dwarf_psymtab_to_symtab (struct partial_symtab *pst)
+ static void dwarf_psymtab_to_symtab (struct partial_symtab *pst)
-DESCRIPTION
+ DESCRIPTION
- This is the DWARF support entry point for building a full symbol
- table entry from a partial symbol table entry. We are passed a
- pointer to the partial symbol table entry that needs to be expanded.
+ This is the DWARF support entry point for building a full symbol
+ table entry from a partial symbol table entry. We are passed a
+ pointer to the partial symbol table entry that needs to be expanded.
-*/
+ */
static void
-DEFUN(dwarf_psymtab_to_symtab, (pst), struct partial_symtab *pst)
+dwarf_psymtab_to_symtab (pst)
+ struct partial_symtab *pst;
{
- if (!pst)
- {
- return;
- }
- if (pst -> readin)
+ if (pst != NULL)
{
- fprintf (stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
- pst -> filename);
- return;
- }
-
- if (DBLENGTH(pst) || pst -> number_of_dependencies)
- {
- /* Print the message now, before starting serious work, to avoid
- disconcerting pauses. */
- if (info_verbose)
+ if (pst->readin)
{
- printf_filtered ("Reading in symbols for %s...", pst -> filename);
- fflush (stdout);
+ warning ("psymtab for %s already read in. Shouldn't happen.",
+ pst->filename);
}
-
- psymtab_to_symtab_1 (pst);
-
-#if 0 /* FIXME: Check to see what dbxread is doing here and see if
- we need to do an equivalent or is this something peculiar to
- stabs/a.out format. */
- /* Match with global symbols. This only needs to be done once,
- after all of the symtabs and dependencies have been read in. */
- scan_file_globals ();
-#endif
-
- /* Finish up the debug error message. */
- if (info_verbose)
+ else
{
- printf_filtered ("done.\n");
- }
- }
-}
-
-/*
-
-LOCAL FUNCTION
-
- init_psymbol_list -- initialize storage for partial symbols
-
-SYNOPSIS
-
- static void init_psymbol_list (int total_symbols)
-
-DESCRIPTION
-
- Initializes storage for all of the partial symbols that will be
- created by dwarf_build_psymtabs and subsidiaries.
- */
-
-static void
-DEFUN(init_psymbol_list, (total_symbols), int total_symbols)
-{
- /* Free any previously allocated psymbol lists. */
-
- if (global_psymbols.list)
- {
- free (global_psymbols.list);
- }
- if (static_psymbols.list)
- {
- free (static_psymbols.list);
- }
-
- /* Current best guess is that there are approximately a twentieth
- of the total symbols (in a debugging file) are global or static
- oriented symbols */
-
- global_psymbols.size = total_symbols / 10;
- static_psymbols.size = total_symbols / 10;
- global_psymbols.next = global_psymbols.list = (struct partial_symbol *)
- xmalloc (global_psymbols.size * sizeof (struct partial_symbol));
- static_psymbols.next = static_psymbols.list = (struct partial_symbol *)
- xmalloc (static_psymbols.size * sizeof (struct partial_symbol));
-}
-
-/*
-
-LOCAL FUNCTION
-
- start_psymtab -- allocate and partially fill a partial symtab entry
-
-DESCRIPTION
-
- Allocate and partially fill a partial symtab. It will be completely
- filled at the end of the symbol list.
-
- SYMFILE_NAME is the name of the symbol-file we are reading from, and
- ADDR is the address relative to which its symbols are (incremental)
- or 0 (normal). FILENAME is the name of the compilation unit that
- these symbols were defined in, and they appear starting a address
- TEXTLOW. DBROFF is the absolute file offset in SYMFILE_NAME where
- the full symbols can be read for compilation unit FILENAME.
- GLOBAL_SYMS and STATIC_SYMS are pointers to the current end of the
- psymtab vector.
-
- */
-
-static struct partial_symtab *
-DEFUN(start_psymtab,
- (objfile, addr, filename, textlow, texthigh, dbfoff, curoff,
- culength, lnfoff, global_syms, static_syms),
- struct objfile *objfile AND
- CORE_ADDR addr AND
- char *filename AND
- CORE_ADDR textlow AND
- CORE_ADDR texthigh AND
- int dbfoff AND
- int curoff AND
- int culength AND
- int lnfoff AND
- struct partial_symbol *global_syms AND
- struct partial_symbol *static_syms)
-{
- struct partial_symtab *result;
-
- result = (struct partial_symtab *)
- obstack_alloc (psymbol_obstack, sizeof (struct partial_symtab));
- (void) memset (result, 0, sizeof (struct partial_symtab));
- result -> addr = addr;
- result -> objfile = objfile;
- result -> filename = create_name (filename, psymbol_obstack);
- result -> textlow = textlow;
- result -> texthigh = texthigh;
- result -> read_symtab_private = (char *) obstack_alloc (psymbol_obstack,
- sizeof (struct dwfinfo));
- DBFOFF (result) = dbfoff;
- DBROFF (result) = curoff;
- DBLENGTH (result) = culength;
- LNFOFF (result) = lnfoff;
- result -> readin = 0;
- result -> symtab = NULL;
- result -> read_symtab = dwarf_psymtab_to_symtab;
- result -> globals_offset = global_syms - global_psymbols.list;
- result -> statics_offset = static_syms - static_psymbols.list;
-
- result->n_global_syms = 0;
- result->n_static_syms = 0;
-
- return result;
-}
-
-#if 0
-/*
-
-LOCAL FUNCTION
-
- add_psymbol_to_list -- add a partial symbol to given list
-
-DESCRIPTION
+ if (DBLENGTH (pst) || pst->number_of_dependencies)
+ {
+ /* Print the message now, before starting serious work, to avoid
+ disconcerting pauses. */
+ if (info_verbose)
+ {
+ printf_filtered ("Reading in symbols for %s...",
+ pst->filename);
+ gdb_flush (gdb_stdout);
+ }
- Add a partial symbol to one of the partial symbol vectors (pointed to
- by listp). The vector is grown as necessary.
+ psymtab_to_symtab_1 (pst);
- */
+#if 0 /* FIXME: Check to see what dbxread is doing here and see if
+ we need to do an equivalent or is this something peculiar to
+ stabs/a.out format.
+ Match with global symbols. This only needs to be done once,
+ after all of the symtabs and dependencies have been read in.
+ */
+ scan_file_globals (pst->objfile);
+#endif
-static void
-DEFUN(add_psymbol_to_list,
- (listp, name, space, class, value),
- struct psymbol_allocation_list *listp AND
- char *name AND
- enum namespace space AND
- enum address_class class AND
- CORE_ADDR value)
-{
- struct partial_symbol *psym;
- int newsize;
-
- if (listp -> next >= listp -> list + listp -> size)
- {
- newsize = listp -> size * 2;
- listp -> list = (struct partial_symbol *)
- xrealloc (listp -> list, (newsize * sizeof (struct partial_symbol)));
- /* Next assumes we only went one over. Should be good if program works
- correctly */
- listp -> next = listp -> list + listp -> size;
- listp -> size = newsize;
- }
- psym = listp -> next++;
- SYMBOL_NAME (psym) = create_name (name, psymbol_obstack);
- SYMBOL_NAMESPACE (psym) = space;
- SYMBOL_CLASS (psym) = class;
- SYMBOL_VALUE (psym) = value;
+ /* Finish up the verbose info message. */
+ if (info_verbose)
+ {
+ printf_filtered ("done.\n");
+ gdb_flush (gdb_stdout);
+ }
+ }
+ }
+ }
}
-#endif
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- add_enum_psymbol -- add enumeration members to partial symbol table
+ add_enum_psymbol -- add enumeration members to partial symbol table
-DESCRIPTION
+ DESCRIPTION
- Given pointer to a DIE that is known to be for an enumeration,
- extract the symbolic names of the enumeration members and add
- partial symbols for them.
-*/
+ Given pointer to a DIE that is known to be for an enumeration,
+ extract the symbolic names of the enumeration members and add
+ partial symbols for them.
+ */
static void
-DEFUN(add_enum_psymbol, (dip), struct dieinfo *dip)
+add_enum_psymbol (dip, objfile)
+ struct dieinfo *dip;
+ struct objfile *objfile;
{
char *scan;
char *listend;
- long ltemp;
- short stemp;
-
- if ((scan = dip -> at_element_list) != NULL)
+ unsigned short blocksz;
+ int nbytes;
+
+ if ((scan = dip->at_element_list) != NULL)
{
- if (dip -> short_element_list)
+ if (dip->short_element_list)
{
- (void) memcpy (&stemp, scan, sizeof (stemp));
- listend = scan + stemp + sizeof (stemp);
- scan += sizeof (stemp);
+ nbytes = attribute_size (AT_short_element_list);
}
else
{
- (void) memcpy (<emp, scan, sizeof (ltemp));
- listend = scan + ltemp + sizeof (ltemp);
- scan += sizeof (ltemp);
+ nbytes = attribute_size (AT_element_list);
}
+ blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile);
+ scan += nbytes;
+ listend = scan + blocksz;
while (scan < listend)
{
- scan += sizeof (long);
- add_psymbol_to_list (&static_psymbols, scan, VAR_NAMESPACE,
- LOC_CONST, 0);
+ scan += TARGET_FT_LONG_SIZE (objfile);
+ add_psymbol_to_list (scan, strlen (scan), VAR_NAMESPACE, LOC_CONST,
+ &objfile->static_psymbols, 0, 0, cu_language,
+ objfile);
scan += strlen (scan) + 1;
}
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- add_partial_symbol -- add symbol to partial symbol table
+ add_partial_symbol -- add symbol to partial symbol table
-DESCRIPTION
+ DESCRIPTION
+
+ Given a DIE, if it is one of the types that we want to
+ add to a partial symbol table, finish filling in the die info
+ and then add a partial symbol table entry for it.
- Given a DIE, if it is one of the types that we want to
- add to a partial symbol table, finish filling in the die info
- and then add a partial symbol table entry for it.
+ NOTES
-*/
+ The caller must ensure that the DIE has a valid name attribute.
+ */
static void
-DEFUN(add_partial_symbol, (dip), struct dieinfo *dip)
+add_partial_symbol (dip, objfile)
+ struct dieinfo *dip;
+ struct objfile *objfile;
{
- switch (dip -> dietag)
+ switch (dip->die_tag)
{
case TAG_global_subroutine:
- record_misc_function (dip -> at_name, dip -> at_low_pc, mf_text);
- add_psymbol_to_list (&global_psymbols, dip -> at_name, VAR_NAMESPACE,
- LOC_BLOCK, dip -> at_low_pc);
+ add_psymbol_to_list (dip->at_name, strlen (dip->at_name),
+ VAR_NAMESPACE, LOC_BLOCK,
+ &objfile->global_psymbols,
+ 0, dip->at_low_pc, cu_language, objfile);
break;
case TAG_global_variable:
- record_misc_function (dip -> at_name, locval (dip -> at_location),
- mf_data);
- add_psymbol_to_list (&global_psymbols, dip -> at_name, VAR_NAMESPACE,
- LOC_STATIC, 0);
+ add_psymbol_to_list (dip->at_name, strlen (dip->at_name),
+ VAR_NAMESPACE, LOC_STATIC,
+ &objfile->global_psymbols,
+ 0, 0, cu_language, objfile);
break;
case TAG_subroutine:
- add_psymbol_to_list (&static_psymbols, dip -> at_name, VAR_NAMESPACE,
- LOC_BLOCK, dip -> at_low_pc);
+ add_psymbol_to_list (dip->at_name, strlen (dip->at_name),
+ VAR_NAMESPACE, LOC_BLOCK,
+ &objfile->static_psymbols,
+ 0, dip->at_low_pc, cu_language, objfile);
break;
case TAG_local_variable:
- add_psymbol_to_list (&static_psymbols, dip -> at_name, VAR_NAMESPACE,
- LOC_STATIC, 0);
+ add_psymbol_to_list (dip->at_name, strlen (dip->at_name),
+ VAR_NAMESPACE, LOC_STATIC,
+ &objfile->static_psymbols,
+ 0, 0, cu_language, objfile);
break;
case TAG_typedef:
- add_psymbol_to_list (&static_psymbols, dip -> at_name, VAR_NAMESPACE,
- LOC_TYPEDEF, 0);
+ add_psymbol_to_list (dip->at_name, strlen (dip->at_name),
+ VAR_NAMESPACE, LOC_TYPEDEF,
+ &objfile->static_psymbols,
+ 0, 0, cu_language, objfile);
break;
+ case TAG_class_type:
case TAG_structure_type:
case TAG_union_type:
- add_psymbol_to_list (&static_psymbols, dip -> at_name, STRUCT_NAMESPACE,
- LOC_TYPEDEF, 0);
- break;
case TAG_enumeration_type:
- if (dip -> at_name)
+ /* Do not add opaque aggregate definitions to the psymtab. */
+ if (!dip->has_at_byte_size)
+ break;
+ add_psymbol_to_list (dip->at_name, strlen (dip->at_name),
+ STRUCT_NAMESPACE, LOC_TYPEDEF,
+ &objfile->static_psymbols,
+ 0, 0, cu_language, objfile);
+ if (cu_language == language_cplus)
{
- add_psymbol_to_list (&static_psymbols, dip -> at_name,
- STRUCT_NAMESPACE, LOC_TYPEDEF, 0);
+ /* For C++, these implicitly act as typedefs as well. */
+ add_psymbol_to_list (dip->at_name, strlen (dip->at_name),
+ VAR_NAMESPACE, LOC_TYPEDEF,
+ &objfile->static_psymbols,
+ 0, 0, cu_language, objfile);
}
- add_enum_psymbol (dip);
break;
}
}
-
+/* *INDENT-OFF* */
/*
LOCAL FUNCTION
Process the DIE's within a single compilation unit, looking for
interesting DIE's that contribute to the partial symbol table entry
- for this compilation unit. Since we cannot follow any sibling
- chains without reading the complete DIE info for every DIE,
- it is probably faster to just sequentially check each one to
- see if it is one of the types we are interested in, and if so,
- then extract all the attributes info and generate a partial
- symbol table entry.
+ for this compilation unit.
NOTES
+ There are some DIE's that may appear both at file scope and within
+ the scope of a function. We are only interested in the ones at file
+ scope, and the only way to tell them apart is to keep track of the
+ scope. For example, consider the test case:
+
+ static int i;
+ main () { int j; }
+
+ for which the relevant DWARF segment has the structure:
+
+ 0x51:
+ 0x23 global subrtn sibling 0x9b
+ name main
+ fund_type FT_integer
+ low_pc 0x800004cc
+ high_pc 0x800004d4
+
+ 0x74:
+ 0x23 local var sibling 0x97
+ name j
+ fund_type FT_integer
+ location OP_BASEREG 0xe
+ OP_CONST 0xfffffffc
+ OP_ADD
+ 0x97:
+ 0x4
+
+ 0x9b:
+ 0x1d local var sibling 0xb8
+ name i
+ fund_type FT_integer
+ location OP_ADDR 0x800025dc
+
+ 0xb8:
+ 0x4
+
+ We want to include the symbol 'i' in the partial symbol table, but
+ not the symbol 'j'. In essence, we want to skip all the dies within
+ the scope of a TAG_global_subroutine DIE.
+
Don't attempt to add anonymous structures or unions since they have
no name. Anonymous enumerations however are processed, because we
want to extract their member names (the check for a tag name is
where the actual definition occurs, rather than just a reference
to an external.
*/
+/* *INDENT-ON* */
+
+
static void
-DEFUN(scan_partial_symbols, (thisdie, enddie), char *thisdie AND char *enddie)
+scan_partial_symbols (thisdie, enddie, objfile)
+ char *thisdie;
+ char *enddie;
+ struct objfile *objfile;
{
char *nextdie;
+ char *temp;
struct dieinfo di;
-
+
while (thisdie < enddie)
{
- basicdieinfo (&di, thisdie);
- if (di.dielength < sizeof (long))
+ basicdieinfo (&di, thisdie, objfile);
+ if (di.die_length < SIZEOF_DIE_LENGTH)
{
break;
}
else
{
- nextdie = thisdie + di.dielength;
+ nextdie = thisdie + di.die_length;
/* To avoid getting complete die information for every die, we
only do it (below) for the cases we are interested in. */
- switch (di.dietag)
+ switch (di.die_tag)
{
case TAG_global_subroutine:
case TAG_subroutine:
+ completedieinfo (&di, objfile);
+ if (di.at_name && (di.has_at_low_pc || di.at_location))
+ {
+ add_partial_symbol (&di, objfile);
+ /* If there is a sibling attribute, adjust the nextdie
+ pointer to skip the entire scope of the subroutine.
+ Apply some sanity checking to make sure we don't
+ overrun or underrun the range of remaining DIE's */
+ if (di.at_sibling != 0)
+ {
+ temp = dbbase + di.at_sibling - dbroff;
+ if ((temp < thisdie) || (temp >= enddie))
+ {
+ complain (&bad_die_ref, DIE_ID, DIE_NAME,
+ di.at_sibling);
+ }
+ else
+ {
+ nextdie = temp;
+ }
+ }
+ }
+ break;
case TAG_global_variable:
case TAG_local_variable:
- completedieinfo (&di);
+ completedieinfo (&di, objfile);
if (di.at_name && (di.has_at_low_pc || di.at_location))
{
- add_partial_symbol (&di);
+ add_partial_symbol (&di, objfile);
}
break;
case TAG_typedef:
+ case TAG_class_type:
case TAG_structure_type:
case TAG_union_type:
- completedieinfo (&di);
+ completedieinfo (&di, objfile);
if (di.at_name)
{
- add_partial_symbol (&di);
+ add_partial_symbol (&di, objfile);
}
break;
case TAG_enumeration_type:
- completedieinfo (&di);
- add_partial_symbol (&di);
+ completedieinfo (&di, objfile);
+ if (di.at_name)
+ {
+ add_partial_symbol (&di, objfile);
+ }
+ add_enum_psymbol (&di, objfile);
break;
}
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- scan_compilation_units -- build a psymtab entry for each compilation
+ scan_compilation_units -- build a psymtab entry for each compilation
-DESCRIPTION
+ DESCRIPTION
- This is the top level dwarf parsing routine for building partial
- symbol tables.
-
- It scans from the beginning of the DWARF table looking for the first
- TAG_compile_unit DIE, and then follows the sibling chain to locate
- each additional TAG_compile_unit DIE.
-
- For each TAG_compile_unit DIE it creates a partial symtab structure,
- calls a subordinate routine to collect all the compilation unit's
- global DIE's, file scope DIEs, typedef DIEs, etc, and then links the
- new partial symtab structure into the partial symbol table. It also
- records the appropriate information in the partial symbol table entry
- to allow the chunk of DIE's and line number table for this compilation
- unit to be located and re-read later, to generate a complete symbol
- table entry for the compilation unit.
-
- Thus it effectively partitions up a chunk of DIE's for multiple
- compilation units into smaller DIE chunks and line number tables,
- and associates them with a partial symbol table entry.
+ This is the top level dwarf parsing routine for building partial
+ symbol tables.
-NOTES
+ It scans from the beginning of the DWARF table looking for the first
+ TAG_compile_unit DIE, and then follows the sibling chain to locate
+ each additional TAG_compile_unit DIE.
+
+ For each TAG_compile_unit DIE it creates a partial symtab structure,
+ calls a subordinate routine to collect all the compilation unit's
+ global DIE's, file scope DIEs, typedef DIEs, etc, and then links the
+ new partial symtab structure into the partial symbol table. It also
+ records the appropriate information in the partial symbol table entry
+ to allow the chunk of DIE's and line number table for this compilation
+ unit to be located and re-read later, to generate a complete symbol
+ table entry for the compilation unit.
+
+ Thus it effectively partitions up a chunk of DIE's for multiple
+ compilation units into smaller DIE chunks and line number tables,
+ and associates them with a partial symbol table entry.
+
+ NOTES
- If any compilation unit has no line number table associated with
- it for some reason (a missing at_stmt_list attribute, rather than
- just one with a value of zero, which is valid) then we ensure that
- the recorded file offset is zero so that the routine which later
- reads line number table fragments knows that there is no fragment
- to read.
+ If any compilation unit has no line number table associated with
+ it for some reason (a missing at_stmt_list attribute, rather than
+ just one with a value of zero, which is valid) then we ensure that
+ the recorded file offset is zero so that the routine which later
+ reads line number table fragments knows that there is no fragment
+ to read.
-RETURNS
+ RETURNS
- Returns no value.
+ Returns no value.
*/
static void
-DEFUN(scan_compilation_units,
- (filename, addr, thisdie, enddie, dbfoff, lnoffset, objfile),
- char *filename AND
- CORE_ADDR addr AND
- char *thisdie AND
- char *enddie AND
- unsigned int dbfoff AND
- unsigned int lnoffset AND
- struct objfile *objfile)
+scan_compilation_units (thisdie, enddie, dbfoff, lnoffset, objfile)
+ char *thisdie;
+ char *enddie;
+ file_ptr dbfoff;
+ file_ptr lnoffset;
+ struct objfile *objfile;
{
char *nextdie;
struct dieinfo di;
struct partial_symtab *pst;
int culength;
int curoff;
- int curlnoffset;
+ file_ptr curlnoffset;
while (thisdie < enddie)
{
- basicdieinfo (&di, thisdie);
- if (di.dielength < sizeof (long))
+ basicdieinfo (&di, thisdie, objfile);
+ if (di.die_length < SIZEOF_DIE_LENGTH)
{
break;
}
- else if (di.dietag != TAG_compile_unit)
+ else if (di.die_tag != TAG_compile_unit)
{
- nextdie = thisdie + di.dielength;
+ nextdie = thisdie + di.die_length;
}
else
{
- completedieinfo (&di);
+ completedieinfo (&di, objfile);
+ set_cu_language (&di);
if (di.at_sibling != 0)
{
nextdie = dbbase + di.at_sibling - dbroff;
}
else
{
- nextdie = thisdie + di.dielength;
+ nextdie = thisdie + di.die_length;
}
curoff = thisdie - dbbase;
culength = nextdie - thisdie;
curlnoffset = di.has_at_stmt_list ? lnoffset + di.at_stmt_list : 0;
- pst = start_psymtab (objfile, addr, di.at_name,
- di.at_low_pc + addr,
- di.at_high_pc + addr,
- dbfoff, curoff, culength, curlnoffset,
- global_psymbols.next,
- static_psymbols.next);
- scan_partial_symbols (thisdie + di.dielength, nextdie);
- pst -> n_global_syms = global_psymbols.next -
- (global_psymbols.list + pst -> globals_offset);
- pst -> n_static_syms = static_psymbols.next -
- (static_psymbols.list + pst -> statics_offset);
- /* Sort the global list; don't sort the static list */
- qsort (global_psymbols.list + pst -> globals_offset,
- pst -> n_global_syms, sizeof (struct partial_symbol),
- compare_psymbols);
+
+ /* First allocate a new partial symbol table structure */
+
+ pst = start_psymtab_common (objfile, base_section_offsets,
+ di.at_name, di.at_low_pc,
+ objfile->global_psymbols.next,
+ objfile->static_psymbols.next);
+
+ pst->texthigh = di.at_high_pc;
+ pst->read_symtab_private = (char *)
+ obstack_alloc (&objfile->psymbol_obstack,
+ sizeof (struct dwfinfo));
+ DBFOFF (pst) = dbfoff;
+ DBROFF (pst) = curoff;
+ DBLENGTH (pst) = culength;
+ LNFOFF (pst) = curlnoffset;
+ pst->read_symtab = dwarf_psymtab_to_symtab;
+
+ /* Now look for partial symbols */
+
+ scan_partial_symbols (thisdie + di.die_length, nextdie, objfile);
+
+ pst->n_global_syms = objfile->global_psymbols.next -
+ (objfile->global_psymbols.list + pst->globals_offset);
+ pst->n_static_syms = objfile->static_psymbols.next -
+ (objfile->static_psymbols.list + pst->statics_offset);
+ sort_pst_symbols (pst);
/* If there is already a psymtab or symtab for a file of this name,
remove it. (If there is a symtab, more drastic things also
happen.) This happens in VxWorks. */
- free_named_symtabs (pst -> filename);
- /* Place the partial symtab on the partial symtab list */
- pst -> next = partial_symtab_list;
- partial_symtab_list = pst;
+ free_named_symtabs (pst->filename);
}
- thisdie = nextdie;
+ thisdie = nextdie;
}
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- new_symbol -- make a symbol table entry for a new symbol
+ new_symbol -- make a symbol table entry for a new symbol
-SYNOPSIS
+ SYNOPSIS
- static struct symbol *new_symbol (struct dieinfo *dip)
+ static struct symbol *new_symbol (struct dieinfo *dip,
+ struct objfile *objfile)
-DESCRIPTION
+ DESCRIPTION
- Given a pointer to a DWARF information entry, figure out if we need
- to make a symbol table entry for it, and if so, create a new entry
- and return a pointer to it.
+ Given a pointer to a DWARF information entry, figure out if we need
+ to make a symbol table entry for it, and if so, create a new entry
+ and return a pointer to it.
*/
static struct symbol *
-DEFUN(new_symbol, (dip), struct dieinfo *dip)
+new_symbol (dip, objfile)
+ struct dieinfo *dip;
+ struct objfile *objfile;
{
struct symbol *sym = NULL;
-
- if (dip -> at_name != NULL)
+
+ if (dip->at_name != NULL)
{
- sym = (struct symbol *) obstack_alloc (symbol_obstack,
+ sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack,
sizeof (struct symbol));
- (void) memset (sym, 0, sizeof (struct symbol));
- SYMBOL_NAME (sym) = create_name (dip -> at_name, symbol_obstack);
+ OBJSTAT (objfile, n_syms++);
+ memset (sym, 0, sizeof (struct symbol));
+ SYMBOL_NAME (sym) = create_name (dip->at_name,
+ &objfile->symbol_obstack);
/* default assumptions */
SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
SYMBOL_CLASS (sym) = LOC_STATIC;
SYMBOL_TYPE (sym) = decode_die_type (dip);
- switch (dip -> dietag)
+
+ /* If this symbol is from a C++ compilation, then attempt to cache the
+ demangled form for future reference. This is a typical time versus
+ space tradeoff, that was decided in favor of time because it sped up
+ C++ symbol lookups by a factor of about 20. */
+
+ SYMBOL_LANGUAGE (sym) = cu_language;
+ SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack);
+ switch (dip->die_tag)
{
case TAG_label:
- SYMBOL_VALUE (sym) = dip -> at_low_pc + baseaddr;
+ SYMBOL_VALUE_ADDRESS (sym) = dip->at_low_pc;
SYMBOL_CLASS (sym) = LOC_LABEL;
break;
case TAG_global_subroutine:
case TAG_subroutine:
- SYMBOL_VALUE (sym) = dip -> at_low_pc + baseaddr;
+ SYMBOL_VALUE_ADDRESS (sym) = dip->at_low_pc;
SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym));
+ if (dip->at_prototyped)
+ TYPE_FLAGS (SYMBOL_TYPE (sym)) |= TYPE_FLAG_PROTOTYPED;
SYMBOL_CLASS (sym) = LOC_BLOCK;
- if (dip -> dietag == TAG_global_subroutine)
+ if (dip->die_tag == TAG_global_subroutine)
{
add_symbol_to_list (sym, &global_symbols);
}
else
{
- add_symbol_to_list (sym, &scope -> symbols);
+ add_symbol_to_list (sym, list_in_scope);
}
break;
case TAG_global_variable:
- case TAG_local_variable:
- if (dip -> at_location != NULL)
- {
- SYMBOL_VALUE (sym) = locval (dip -> at_location);
- }
- if (dip -> dietag == TAG_global_variable)
+ if (dip->at_location != NULL)
{
+ SYMBOL_VALUE_ADDRESS (sym) = locval (dip);
add_symbol_to_list (sym, &global_symbols);
SYMBOL_CLASS (sym) = LOC_STATIC;
SYMBOL_VALUE (sym) += baseaddr;
}
- else
+ break;
+ case TAG_local_variable:
+ if (dip->at_location != NULL)
{
- add_symbol_to_list (sym, &scope -> symbols);
- if (scope -> parent != NULL)
+ int loc = locval (dip);
+ if (dip->optimized_out)
{
- if (isreg)
- {
- SYMBOL_CLASS (sym) = LOC_REGISTER;
- }
- else
- {
- SYMBOL_CLASS (sym) = LOC_LOCAL;
- }
+ SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT;
+ }
+ else if (dip->isreg)
+ {
+ SYMBOL_CLASS (sym) = LOC_REGISTER;
+ }
+ else if (dip->offreg)
+ {
+ SYMBOL_CLASS (sym) = LOC_BASEREG;
+ SYMBOL_BASEREG (sym) = dip->basereg;
}
else
{
SYMBOL_CLASS (sym) = LOC_STATIC;
SYMBOL_VALUE (sym) += baseaddr;
}
+ if (SYMBOL_CLASS (sym) == LOC_STATIC)
+ {
+ /* LOC_STATIC address class MUST use SYMBOL_VALUE_ADDRESS,
+ which may store to a bigger location than SYMBOL_VALUE. */
+ SYMBOL_VALUE_ADDRESS (sym) = loc;
+ }
+ else
+ {
+ SYMBOL_VALUE (sym) = loc;
+ }
+ add_symbol_to_list (sym, list_in_scope);
}
break;
case TAG_formal_parameter:
- if (dip -> at_location != NULL)
+ if (dip->at_location != NULL)
{
- SYMBOL_VALUE (sym) = locval (dip -> at_location);
+ SYMBOL_VALUE (sym) = locval (dip);
}
- add_symbol_to_list (sym, &scope -> symbols);
- if (isreg)
+ add_symbol_to_list (sym, list_in_scope);
+ if (dip->isreg)
{
SYMBOL_CLASS (sym) = LOC_REGPARM;
}
+ else if (dip->offreg)
+ {
+ SYMBOL_CLASS (sym) = LOC_BASEREG_ARG;
+ SYMBOL_BASEREG (sym) = dip->basereg;
+ }
else
{
SYMBOL_CLASS (sym) = LOC_ARG;
/* From varargs functions; gdb doesn't seem to have any interest in
this information, so just ignore it for now. (FIXME?) */
break;
+ case TAG_class_type:
case TAG_structure_type:
case TAG_union_type:
case TAG_enumeration_type:
SYMBOL_CLASS (sym) = LOC_TYPEDEF;
SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE;
- add_symbol_to_list (sym, &scope -> symbols);
+ add_symbol_to_list (sym, list_in_scope);
break;
case TAG_typedef:
SYMBOL_CLASS (sym) = LOC_TYPEDEF;
SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
- add_symbol_to_list (sym, &scope -> symbols);
+ add_symbol_to_list (sym, list_in_scope);
break;
default:
/* Not a tag we recognize. Hopefully we aren't processing trash
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- decode_mod_fund_type -- decode a modified fundamental type
+ synthesize_typedef -- make a symbol table entry for a "fake" typedef
-SYNOPSIS
+ SYNOPSIS
- static struct type *decode_mod_fund_type (char *typedata)
+ static void synthesize_typedef (struct dieinfo *dip,
+ struct objfile *objfile,
+ struct type *type);
-DESCRIPTION
+ DESCRIPTION
+
+ Given a pointer to a DWARF information entry, synthesize a typedef
+ for the name in the DIE, using the specified type.
+
+ This is used for C++ class, structs, unions, and enumerations to
+ set up the tag name as a type.
+
+ */
+
+static void
+synthesize_typedef (dip, objfile, type)
+ struct dieinfo *dip;
+ struct objfile *objfile;
+ struct type *type;
+{
+ struct symbol *sym = NULL;
+
+ if (dip->at_name != NULL)
+ {
+ sym = (struct symbol *)
+ obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol));
+ OBJSTAT (objfile, n_syms++);
+ memset (sym, 0, sizeof (struct symbol));
+ SYMBOL_NAME (sym) = create_name (dip->at_name,
+ &objfile->symbol_obstack);
+ SYMBOL_INIT_LANGUAGE_SPECIFIC (sym, cu_language);
+ SYMBOL_TYPE (sym) = type;
+ SYMBOL_CLASS (sym) = LOC_TYPEDEF;
+ SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
+ add_symbol_to_list (sym, list_in_scope);
+ }
+}
+
+/*
+
+ LOCAL FUNCTION
+
+ decode_mod_fund_type -- decode a modified fundamental type
+
+ SYNOPSIS
+
+ static struct type *decode_mod_fund_type (char *typedata)
- Decode a block of data containing a modified fundamental
- type specification. TYPEDATA is a pointer to the block,
- which consists of a two byte length, containing the size
- of the rest of the block. At the end of the block is a
- two byte value that gives the fundamental type. Everything
- in between are type modifiers.
+ DESCRIPTION
- We simply compute the number of modifiers and call the general
- function decode_modified_type to do the actual work.
-*/
+ Decode a block of data containing a modified fundamental
+ type specification. TYPEDATA is a pointer to the block,
+ which starts with a length containing the size of the rest
+ of the block. At the end of the block is a fundmental type
+ code value that gives the fundamental type. Everything
+ in between are type modifiers.
+
+ We simply compute the number of modifiers and call the general
+ function decode_modified_type to do the actual work.
+ */
static struct type *
-DEFUN(decode_mod_fund_type, (typedata), char *typedata)
+decode_mod_fund_type (typedata)
+ char *typedata;
{
struct type *typep = NULL;
unsigned short modcount;
- unsigned char *modifiers;
-
+ int nbytes;
+
/* Get the total size of the block, exclusive of the size itself */
- (void) memcpy (&modcount, typedata, sizeof (short));
+
+ nbytes = attribute_size (AT_mod_fund_type);
+ modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile);
+ typedata += nbytes;
+
/* Deduct the size of the fundamental type bytes at the end of the block. */
- modcount -= sizeof (short);
- /* Skip over the two size bytes at the beginning of the block. */
- modifiers = (unsigned char *) typedata + sizeof (short);
+
+ modcount -= attribute_size (AT_fund_type);
+
/* Now do the actual decoding */
- typep = decode_modified_type (modifiers, modcount, AT_mod_fund_type);
+
+ typep = decode_modified_type (typedata, modcount, AT_mod_fund_type);
return (typep);
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- decode_mod_u_d_type -- decode a modified user defined type
+ decode_mod_u_d_type -- decode a modified user defined type
-SYNOPSIS
+ SYNOPSIS
- static struct type *decode_mod_u_d_type (char *typedata)
+ static struct type *decode_mod_u_d_type (char *typedata)
-DESCRIPTION
+ DESCRIPTION
- Decode a block of data containing a modified user defined
- type specification. TYPEDATA is a pointer to the block,
- which consists of a two byte length, containing the size
- of the rest of the block. At the end of the block is a
- four byte value that gives a reference to a user defined type.
- Everything in between are type modifiers.
+ Decode a block of data containing a modified user defined
+ type specification. TYPEDATA is a pointer to the block,
+ which consists of a two byte length, containing the size
+ of the rest of the block. At the end of the block is a
+ four byte value that gives a reference to a user defined type.
+ Everything in between are type modifiers.
- We simply compute the number of modifiers and call the general
- function decode_modified_type to do the actual work.
-*/
+ We simply compute the number of modifiers and call the general
+ function decode_modified_type to do the actual work.
+ */
static struct type *
-DEFUN(decode_mod_u_d_type, (typedata), char *typedata)
+decode_mod_u_d_type (typedata)
+ char *typedata;
{
struct type *typep = NULL;
unsigned short modcount;
- unsigned char *modifiers;
-
+ int nbytes;
+
/* Get the total size of the block, exclusive of the size itself */
- (void) memcpy (&modcount, typedata, sizeof (short));
+
+ nbytes = attribute_size (AT_mod_u_d_type);
+ modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile);
+ typedata += nbytes;
+
/* Deduct the size of the reference type bytes at the end of the block. */
- modcount -= sizeof (long);
- /* Skip over the two size bytes at the beginning of the block. */
- modifiers = (unsigned char *) typedata + sizeof (short);
+
+ modcount -= attribute_size (AT_user_def_type);
+
/* Now do the actual decoding */
- typep = decode_modified_type (modifiers, modcount, AT_mod_u_d_type);
+
+ typep = decode_modified_type (typedata, modcount, AT_mod_u_d_type);
return (typep);
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- decode_modified_type -- decode modified user or fundamental type
+ decode_modified_type -- decode modified user or fundamental type
-SYNOPSIS
+ SYNOPSIS
- static struct type *decode_modified_type (unsigned char *modifiers,
- unsigned short modcount, int mtype)
+ static struct type *decode_modified_type (char *modifiers,
+ unsigned short modcount, int mtype)
-DESCRIPTION
+ DESCRIPTION
- Decode a modified type, either a modified fundamental type or
- a modified user defined type. MODIFIERS is a pointer to the
- block of bytes that define MODCOUNT modifiers. Immediately
- following the last modifier is a short containing the fundamental
- type or a long containing the reference to the user defined
- type. Which one is determined by MTYPE, which is either
- AT_mod_fund_type or AT_mod_u_d_type to indicate what modified
- type we are generating.
-
- We call ourself recursively to generate each modified type,`
- until MODCOUNT reaches zero, at which point we have consumed
- all the modifiers and generate either the fundamental type or
- user defined type. When the recursion unwinds, each modifier
- is applied in turn to generate the full modified type.
+ Decode a modified type, either a modified fundamental type or
+ a modified user defined type. MODIFIERS is a pointer to the
+ block of bytes that define MODCOUNT modifiers. Immediately
+ following the last modifier is a short containing the fundamental
+ type or a long containing the reference to the user defined
+ type. Which one is determined by MTYPE, which is either
+ AT_mod_fund_type or AT_mod_u_d_type to indicate what modified
+ type we are generating.
-NOTES
+ We call ourself recursively to generate each modified type,`
+ until MODCOUNT reaches zero, at which point we have consumed
+ all the modifiers and generate either the fundamental type or
+ user defined type. When the recursion unwinds, each modifier
+ is applied in turn to generate the full modified type.
- If we find a modifier that we don't recognize, and it is not one
- of those reserved for application specific use, then we issue a
- warning and simply ignore the modifier.
+ NOTES
-BUGS
+ If we find a modifier that we don't recognize, and it is not one
+ of those reserved for application specific use, then we issue a
+ warning and simply ignore the modifier.
- We currently ignore MOD_const and MOD_volatile. (FIXME)
+ BUGS
+
+ We currently ignore MOD_const and MOD_volatile. (FIXME)
*/
static struct type *
-DEFUN(decode_modified_type,
- (modifiers, modcount, mtype),
- unsigned char *modifiers AND unsigned short modcount AND int mtype)
+decode_modified_type (modifiers, modcount, mtype)
+ char *modifiers;
+ unsigned int modcount;
+ int mtype;
{
struct type *typep = NULL;
unsigned short fundtype;
- DIEREF dieref;
- unsigned char modifier;
-
+ DIE_REF die_ref;
+ char modifier;
+ int nbytes;
+
if (modcount == 0)
{
switch (mtype)
{
case AT_mod_fund_type:
- (void) memcpy (&fundtype, modifiers, sizeof (short));
+ nbytes = attribute_size (AT_fund_type);
+ fundtype = target_to_host (modifiers, nbytes, GET_UNSIGNED,
+ current_objfile);
typep = decode_fund_type (fundtype);
break;
case AT_mod_u_d_type:
- (void) memcpy (&dieref, modifiers, sizeof (DIEREF));
- if ((typep = lookup_utype (dieref)) == NULL)
+ nbytes = attribute_size (AT_user_def_type);
+ die_ref = target_to_host (modifiers, nbytes, GET_UNSIGNED,
+ current_objfile);
+ if ((typep = lookup_utype (die_ref)) == NULL)
{
- typep = alloc_utype (dieref, NULL);
+ typep = alloc_utype (die_ref, NULL);
}
break;
default:
- SQUAWK (("botched modified type decoding (mtype 0x%x)", mtype));
- typep = builtin_type_int;
+ complain (&botched_modified_type, DIE_ID, DIE_NAME, mtype);
+ typep = dwarf_fundamental_type (current_objfile, FT_INTEGER);
break;
}
}
typep = lookup_reference_type (typep);
break;
case MOD_const:
- SQUAWK (("type modifier 'const' ignored")); /* FIXME */
+ complain (&const_ignored, DIE_ID, DIE_NAME); /* FIXME */
break;
case MOD_volatile:
- SQUAWK (("type modifier 'volatile' ignored")); /* FIXME */
+ complain (&volatile_ignored, DIE_ID, DIE_NAME); /* FIXME */
break;
default:
- if (!(MOD_lo_user <= modifier && modifier <= MOD_hi_user))
+ if (!(MOD_lo_user <= (unsigned char) modifier
+ && (unsigned char) modifier <= MOD_hi_user))
{
- SQUAWK (("unknown type modifier %u", modifier));
+ complain (&unknown_type_modifier, DIE_ID, DIE_NAME, modifier);
}
break;
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- decode_fund_type -- translate basic DWARF type to gdb base type
+ decode_fund_type -- translate basic DWARF type to gdb base type
-DESCRIPTION
+ DESCRIPTION
- Given an integer that is one of the fundamental DWARF types,
- translate it to one of the basic internal gdb types and return
- a pointer to the appropriate gdb type (a "struct type *").
+ Given an integer that is one of the fundamental DWARF types,
+ translate it to one of the basic internal gdb types and return
+ a pointer to the appropriate gdb type (a "struct type *").
-NOTES
+ NOTES
- If we encounter a fundamental type that we are unprepared to
- deal with, and it is not in the range of those types defined
- as application specific types, then we issue a warning and
- treat the type as builtin_type_int.
-*/
+ For robustness, if we are asked to translate a fundamental
+ type that we are unprepared to deal with, we return int so
+ callers can always depend upon a valid type being returned,
+ and so gdb may at least do something reasonable by default.
+ If the type is not in the range of those types defined as
+ application specific types, we also issue a warning.
+ */
static struct type *
-DEFUN(decode_fund_type, (fundtype), unsigned short fundtype)
+decode_fund_type (fundtype)
+ unsigned int fundtype;
{
struct type *typep = NULL;
-
+
switch (fundtype)
{
case FT_void:
- typep = builtin_type_void;
+ typep = dwarf_fundamental_type (current_objfile, FT_VOID);
+ break;
+
+ case FT_boolean: /* Was FT_set in AT&T version */
+ typep = dwarf_fundamental_type (current_objfile, FT_BOOLEAN);
break;
-
+
case FT_pointer: /* (void *) */
- typep = lookup_pointer_type (builtin_type_void);
+ typep = dwarf_fundamental_type (current_objfile, FT_VOID);
+ typep = lookup_pointer_type (typep);
break;
-
+
case FT_char:
+ typep = dwarf_fundamental_type (current_objfile, FT_CHAR);
+ break;
+
case FT_signed_char:
- typep = builtin_type_char;
+ typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_CHAR);
+ break;
+
+ case FT_unsigned_char:
+ typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_CHAR);
break;
-
+
case FT_short:
+ typep = dwarf_fundamental_type (current_objfile, FT_SHORT);
+ break;
+
case FT_signed_short:
- typep = builtin_type_short;
+ typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_SHORT);
+ break;
+
+ case FT_unsigned_short:
+ typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_SHORT);
break;
-
+
case FT_integer:
+ typep = dwarf_fundamental_type (current_objfile, FT_INTEGER);
+ break;
+
case FT_signed_integer:
- case FT_boolean: /* Was FT_set in AT&T version */
- typep = builtin_type_int;
+ typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_INTEGER);
+ break;
+
+ case FT_unsigned_integer:
+ typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER);
break;
-
+
case FT_long:
+ typep = dwarf_fundamental_type (current_objfile, FT_LONG);
+ break;
+
case FT_signed_long:
- typep = builtin_type_long;
+ typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_LONG);
break;
-
- case FT_float:
- typep = builtin_type_float;
+
+ case FT_unsigned_long:
+ typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_LONG);
break;
-
- case FT_dbl_prec_float:
- typep = builtin_type_double;
+
+ case FT_long_long:
+ typep = dwarf_fundamental_type (current_objfile, FT_LONG_LONG);
break;
-
- case FT_unsigned_char:
- typep = builtin_type_unsigned_char;
+
+ case FT_signed_long_long:
+ typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_LONG_LONG);
break;
-
- case FT_unsigned_short:
- typep = builtin_type_unsigned_short;
+
+ case FT_unsigned_long_long:
+ typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_LONG_LONG);
break;
-
- case FT_unsigned_integer:
- typep = builtin_type_unsigned_int;
+
+ case FT_float:
+ typep = dwarf_fundamental_type (current_objfile, FT_FLOAT);
break;
-
- case FT_unsigned_long:
- typep = builtin_type_unsigned_long;
+
+ case FT_dbl_prec_float:
+ typep = dwarf_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT);
break;
-
+
case FT_ext_prec_float:
- typep = builtin_type_long_double;
+ typep = dwarf_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT);
break;
-
+
case FT_complex:
- typep = builtin_type_complex;
+ typep = dwarf_fundamental_type (current_objfile, FT_COMPLEX);
break;
-
+
case FT_dbl_prec_complex:
- typep = builtin_type_double_complex;
- break;
-
- case FT_long_long:
- case FT_signed_long_long:
- typep = builtin_type_long_long;
+ typep = dwarf_fundamental_type (current_objfile, FT_DBL_PREC_COMPLEX);
break;
- case FT_unsigned_long_long:
- typep = builtin_type_unsigned_long_long;
+ case FT_ext_prec_complex:
+ typep = dwarf_fundamental_type (current_objfile, FT_EXT_PREC_COMPLEX);
break;
}
- if ((typep == NULL) && !(FT_lo_user <= fundtype && fundtype <= FT_hi_user))
+ if (typep == NULL)
{
- SQUAWK (("unexpected fundamental type 0x%x", fundtype));
- typep = builtin_type_void;
+ typep = dwarf_fundamental_type (current_objfile, FT_INTEGER);
+ if (!(FT_lo_user <= fundtype && fundtype <= FT_hi_user))
+ {
+ complain (&unexpected_fund_type, DIE_ID, DIE_NAME, fundtype);
+ }
}
-
+
return (typep);
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- create_name -- allocate a fresh copy of a string on an obstack
+ create_name -- allocate a fresh copy of a string on an obstack
-DESCRIPTION
+ DESCRIPTION
- Given a pointer to a string and a pointer to an obstack, allocates
- a fresh copy of the string on the specified obstack.
+ Given a pointer to a string and a pointer to an obstack, allocates
+ a fresh copy of the string on the specified obstack.
-*/
+ */
static char *
-DEFUN(create_name, (name, obstackp), char *name AND struct obstack *obstackp)
+create_name (name, obstackp)
+ char *name;
+ struct obstack *obstackp;
{
int length;
char *newname;
length = strlen (name) + 1;
newname = (char *) obstack_alloc (obstackp, length);
- (void) strcpy (newname, name);
+ strcpy (newname, name);
return (newname);
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- basicdieinfo -- extract the minimal die info from raw die data
+ basicdieinfo -- extract the minimal die info from raw die data
-SYNOPSIS
+ SYNOPSIS
- void basicdieinfo (char *diep, struct dieinfo *dip)
+ void basicdieinfo (char *diep, struct dieinfo *dip,
+ struct objfile *objfile)
-DESCRIPTION
+ DESCRIPTION
- Given a pointer to raw DIE data, and a pointer to an instance of a
- die info structure, this function extracts the basic information
- from the DIE data required to continue processing this DIE, along
- with some bookkeeping information about the DIE.
+ Given a pointer to raw DIE data, and a pointer to an instance of a
+ die info structure, this function extracts the basic information
+ from the DIE data required to continue processing this DIE, along
+ with some bookkeeping information about the DIE.
- The information we absolutely must have includes the DIE tag,
- and the DIE length. If we need the sibling reference, then we
- will have to call completedieinfo() to process all the remaining
- DIE information.
+ The information we absolutely must have includes the DIE tag,
+ and the DIE length. If we need the sibling reference, then we
+ will have to call completedieinfo() to process all the remaining
+ DIE information.
- Note that since there is no guarantee that the data is properly
- aligned in memory for the type of access required (indirection
- through anything other than a char pointer), we use memcpy to
- shuffle data items larger than a char. Possibly inefficient, but
- quite portable.
+ Note that since there is no guarantee that the data is properly
+ aligned in memory for the type of access required (indirection
+ through anything other than a char pointer), and there is no
+ guarantee that it is in the same byte order as the gdb host,
+ we call a function which deals with both alignment and byte
+ swapping issues. Possibly inefficient, but quite portable.
- We also take care of some other basic things at this point, such
- as ensuring that the instance of the die info structure starts
- out completely zero'd and that curdie is initialized for use
- in error reporting if we have a problem with the current die.
+ We also take care of some other basic things at this point, such
+ as ensuring that the instance of the die info structure starts
+ out completely zero'd and that curdie is initialized for use
+ in error reporting if we have a problem with the current die.
-NOTES
+ NOTES
- All DIE's must have at least a valid length, thus the minimum
- DIE size is sizeof (long). In order to have a valid tag, the
- DIE size must be at least sizeof (short) larger, otherwise they
- are forced to be TAG_padding DIES.
+ All DIE's must have at least a valid length, thus the minimum
+ DIE size is SIZEOF_DIE_LENGTH. In order to have a valid tag, the
+ DIE size must be at least SIZEOF_DIE_TAG larger, otherwise they
+ are forced to be TAG_padding DIES.
- Padding DIES must be at least sizeof(long) in length, implying that
- if a padding DIE is used for alignment and the amount needed is less
- than sizeof(long) then the padding DIE has to be big enough to align
- to the next alignment boundry.
+ Padding DIES must be at least SIZEOF_DIE_LENGTH in length, implying
+ that if a padding DIE is used for alignment and the amount needed is
+ less than SIZEOF_DIE_LENGTH, then the padding DIE has to be big
+ enough to align to the next alignment boundry.
+
+ We do some basic sanity checking here, such as verifying that the
+ length of the die would not cause it to overrun the recorded end of
+ the buffer holding the DIE info. If we find a DIE that is either
+ too small or too large, we force it's length to zero which should
+ cause the caller to take appropriate action.
*/
static void
-DEFUN(basicdieinfo, (dip, diep), struct dieinfo *dip AND char *diep)
+basicdieinfo (dip, diep, objfile)
+ struct dieinfo *dip;
+ char *diep;
+ struct objfile *objfile;
{
curdie = dip;
- (void) memset (dip, 0, sizeof (struct dieinfo));
- dip -> die = diep;
- dip -> dieref = dbroff + (diep - dbbase);
- (void) memcpy (&dip -> dielength, diep, sizeof (long));
- if (dip -> dielength < sizeof (long))
+ memset (dip, 0, sizeof (struct dieinfo));
+ dip->die = diep;
+ dip->die_ref = dbroff + (diep - dbbase);
+ dip->die_length = target_to_host (diep, SIZEOF_DIE_LENGTH, GET_UNSIGNED,
+ objfile);
+ if ((dip->die_length < SIZEOF_DIE_LENGTH) ||
+ ((diep + dip->die_length) > (dbbase + dbsize)))
{
- dwarfwarn ("malformed DIE, bad length (%d bytes)", dip -> dielength);
+ complain (&malformed_die, DIE_ID, DIE_NAME, dip->die_length);
+ dip->die_length = 0;
}
- else if (dip -> dielength < (sizeof (long) + sizeof (short)))
+ else if (dip->die_length < (SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG))
{
- dip -> dietag = TAG_padding;
+ dip->die_tag = TAG_padding;
}
else
{
- (void) memcpy (&dip -> dietag, diep + sizeof (long), sizeof (short));
+ diep += SIZEOF_DIE_LENGTH;
+ dip->die_tag = target_to_host (diep, SIZEOF_DIE_TAG, GET_UNSIGNED,
+ objfile);
}
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- completedieinfo -- finish reading the information for a given DIE
+ completedieinfo -- finish reading the information for a given DIE
-SYNOPSIS
+ SYNOPSIS
- void completedieinfo (struct dieinfo *dip)
+ void completedieinfo (struct dieinfo *dip, struct objfile *objfile)
-DESCRIPTION
+ DESCRIPTION
- Given a pointer to an already partially initialized die info structure,
- scan the raw DIE data and finish filling in the die info structure
- from the various attributes found.
-
- Note that since there is no guarantee that the data is properly
- aligned in memory for the type of access required (indirection
- through anything other than a char pointer), we use memcpy to
- shuffle data items larger than a char. Possibly inefficient, but
- quite portable.
+ Given a pointer to an already partially initialized die info structure,
+ scan the raw DIE data and finish filling in the die info structure
+ from the various attributes found.
-NOTES
+ Note that since there is no guarantee that the data is properly
+ aligned in memory for the type of access required (indirection
+ through anything other than a char pointer), and there is no
+ guarantee that it is in the same byte order as the gdb host,
+ we call a function which deals with both alignment and byte
+ swapping issues. Possibly inefficient, but quite portable.
- Each time we are called, we increment the diecount variable, which
- keeps an approximate count of the number of dies processed for
- each compilation unit. This information is presented to the user
- if the info_verbose flag is set.
+ NOTES
+
+ Each time we are called, we increment the diecount variable, which
+ keeps an approximate count of the number of dies processed for
+ each compilation unit. This information is presented to the user
+ if the info_verbose flag is set.
*/
static void
-DEFUN(completedieinfo, (dip), struct dieinfo *dip)
+completedieinfo (dip, objfile)
+ struct dieinfo *dip;
+ struct objfile *objfile;
{
char *diep; /* Current pointer into raw DIE data */
char *end; /* Terminate DIE scan here */
unsigned short attr; /* Current attribute being scanned */
unsigned short form; /* Form of the attribute */
- short block2sz; /* Size of a block2 attribute field */
- long block4sz; /* Size of a block4 attribute field */
-
+ int nbytes; /* Size of next field to read */
+
diecount++;
- diep = dip -> die;
- end = diep + dip -> dielength;
- diep += sizeof (long) + sizeof (short);
+ diep = dip->die;
+ end = diep + dip->die_length;
+ diep += SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG;
while (diep < end)
{
- (void) memcpy (&attr, diep, sizeof (short));
- diep += sizeof (short);
+ attr = target_to_host (diep, SIZEOF_ATTRIBUTE, GET_UNSIGNED, objfile);
+ diep += SIZEOF_ATTRIBUTE;
+ if ((nbytes = attribute_size (attr)) == -1)
+ {
+ complain (&unknown_attribute_length, DIE_ID, DIE_NAME);
+ diep = end;
+ continue;
+ }
switch (attr)
{
case AT_fund_type:
- (void) memcpy (&dip -> at_fund_type, diep, sizeof (short));
+ dip->at_fund_type = target_to_host (diep, nbytes, GET_UNSIGNED,
+ objfile);
break;
case AT_ordering:
- (void) memcpy (&dip -> at_ordering, diep, sizeof (short));
+ dip->at_ordering = target_to_host (diep, nbytes, GET_UNSIGNED,
+ objfile);
break;
case AT_bit_offset:
- (void) memcpy (&dip -> at_bit_offset, diep, sizeof (short));
- break;
- case AT_visibility:
- (void) memcpy (&dip -> at_visibility, diep, sizeof (short));
+ dip->at_bit_offset = target_to_host (diep, nbytes, GET_UNSIGNED,
+ objfile);
break;
case AT_sibling:
- (void) memcpy (&dip -> at_sibling, diep, sizeof (long));
+ dip->at_sibling = target_to_host (diep, nbytes, GET_UNSIGNED,
+ objfile);
break;
case AT_stmt_list:
- (void) memcpy (&dip -> at_stmt_list, diep, sizeof (long));
- dip -> has_at_stmt_list = 1;
+ dip->at_stmt_list = target_to_host (diep, nbytes, GET_UNSIGNED,
+ objfile);
+ dip->has_at_stmt_list = 1;
break;
case AT_low_pc:
- (void) memcpy (&dip -> at_low_pc, diep, sizeof (long));
- dip -> has_at_low_pc = 1;
+ dip->at_low_pc = target_to_host (diep, nbytes, GET_UNSIGNED,
+ objfile);
+ dip->at_low_pc += baseaddr;
+ dip->has_at_low_pc = 1;
break;
case AT_high_pc:
- (void) memcpy (&dip -> at_high_pc, diep, sizeof (long));
+ dip->at_high_pc = target_to_host (diep, nbytes, GET_UNSIGNED,
+ objfile);
+ dip->at_high_pc += baseaddr;
break;
case AT_language:
- (void) memcpy (&dip -> at_language, diep, sizeof (long));
+ dip->at_language = target_to_host (diep, nbytes, GET_UNSIGNED,
+ objfile);
break;
case AT_user_def_type:
- (void) memcpy (&dip -> at_user_def_type, diep, sizeof (long));
+ dip->at_user_def_type = target_to_host (diep, nbytes,
+ GET_UNSIGNED, objfile);
break;
case AT_byte_size:
- (void) memcpy (&dip -> at_byte_size, diep, sizeof (long));
+ dip->at_byte_size = target_to_host (diep, nbytes, GET_UNSIGNED,
+ objfile);
+ dip->has_at_byte_size = 1;
break;
case AT_bit_size:
- (void) memcpy (&dip -> at_bit_size, diep, sizeof (long));
+ dip->at_bit_size = target_to_host (diep, nbytes, GET_UNSIGNED,
+ objfile);
break;
case AT_member:
- (void) memcpy (&dip -> at_member, diep, sizeof (long));
+ dip->at_member = target_to_host (diep, nbytes, GET_UNSIGNED,
+ objfile);
break;
case AT_discr:
- (void) memcpy (&dip -> at_discr, diep, sizeof (long));
- break;
- case AT_import:
- (void) memcpy (&dip -> at_import, diep, sizeof (long));
+ dip->at_discr = target_to_host (diep, nbytes, GET_UNSIGNED,
+ objfile);
break;
case AT_location:
- dip -> at_location = diep;
+ dip->at_location = diep;
break;
case AT_mod_fund_type:
- dip -> at_mod_fund_type = diep;
+ dip->at_mod_fund_type = diep;
break;
case AT_subscr_data:
- dip -> at_subscr_data = diep;
+ dip->at_subscr_data = diep;
break;
case AT_mod_u_d_type:
- dip -> at_mod_u_d_type = diep;
+ dip->at_mod_u_d_type = diep;
break;
case AT_element_list:
- dip -> at_element_list = diep;
- dip -> short_element_list = 0;
+ dip->at_element_list = diep;
+ dip->short_element_list = 0;
break;
case AT_short_element_list:
- dip -> at_element_list = diep;
- dip -> short_element_list = 1;
+ dip->at_element_list = diep;
+ dip->short_element_list = 1;
break;
case AT_discr_value:
- dip -> at_discr_value = diep;
+ dip->at_discr_value = diep;
break;
case AT_string_length:
- dip -> at_string_length = diep;
+ dip->at_string_length = diep;
break;
case AT_name:
- dip -> at_name = diep;
+ dip->at_name = diep;
break;
case AT_comp_dir:
- dip -> at_comp_dir = diep;
+ /* For now, ignore any "hostname:" portion, since gdb doesn't
+ know how to deal with it. (FIXME). */
+ dip->at_comp_dir = strrchr (diep, ':');
+ if (dip->at_comp_dir != NULL)
+ {
+ dip->at_comp_dir++;
+ }
+ else
+ {
+ dip->at_comp_dir = diep;
+ }
break;
case AT_producer:
- dip -> at_producer = diep;
- break;
- case AT_frame_base:
- (void) memcpy (&dip -> at_frame_base, diep, sizeof (long));
+ dip->at_producer = diep;
break;
case AT_start_scope:
- (void) memcpy (&dip -> at_start_scope, diep, sizeof (long));
+ dip->at_start_scope = target_to_host (diep, nbytes, GET_UNSIGNED,
+ objfile);
break;
case AT_stride_size:
- (void) memcpy (&dip -> at_stride_size, diep, sizeof (long));
+ dip->at_stride_size = target_to_host (diep, nbytes, GET_UNSIGNED,
+ objfile);
break;
case AT_src_info:
- (void) memcpy (&dip -> at_src_info, diep, sizeof (long));
+ dip->at_src_info = target_to_host (diep, nbytes, GET_UNSIGNED,
+ objfile);
break;
case AT_prototyped:
- (void) memcpy (&dip -> at_prototyped, diep, sizeof (short));
+ dip->at_prototyped = diep;
break;
default:
/* Found an attribute that we are unprepared to handle. However
we can just ignore the unknown attribute. */
break;
}
- form = attr & 0xF;
+ form = FORM_FROM_ATTR (attr);
switch (form)
{
case FORM_DATA2:
- diep += sizeof (short);
+ diep += 2;
break;
case FORM_DATA4:
- diep += sizeof (long);
+ case FORM_REF:
+ diep += 4;
break;
case FORM_DATA8:
- diep += 8 * sizeof (char); /* sizeof (long long) ? */
+ diep += 8;
break;
case FORM_ADDR:
- case FORM_REF:
- diep += sizeof (long);
+ diep += TARGET_FT_POINTER_SIZE (objfile);
break;
case FORM_BLOCK2:
- (void) memcpy (&block2sz, diep, sizeof (short));
- block2sz += sizeof (short);
- diep += block2sz;
+ diep += 2 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile);
break;
case FORM_BLOCK4:
- (void) memcpy (&block4sz, diep, sizeof (long));
- block4sz += sizeof (long);
- diep += block4sz;
+ diep += 4 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile);
break;
case FORM_STRING:
diep += strlen (diep) + 1;
break;
default:
- SQUAWK (("unknown attribute form (0x%x), skipped rest", form));
+ complain (&unknown_attribute_form, DIE_ID, DIE_NAME, form);
diep = end;
break;
}
}
}
+
+/*
+
+ LOCAL FUNCTION
+
+ target_to_host -- swap in target data to host
+
+ SYNOPSIS
+
+ target_to_host (char *from, int nbytes, int signextend,
+ struct objfile *objfile)
+
+ DESCRIPTION
+
+ Given pointer to data in target format in FROM, a byte count for
+ the size of the data in NBYTES, a flag indicating whether or not
+ the data is signed in SIGNEXTEND, and a pointer to the current
+ objfile in OBJFILE, convert the data to host format and return
+ the converted value.
+
+ NOTES
+
+ FIXME: If we read data that is known to be signed, and expect to
+ use it as signed data, then we need to explicitly sign extend the
+ result until the bfd library is able to do this for us.
+
+ FIXME: Would a 32 bit target ever need an 8 byte result?
+
+ */
+
+static CORE_ADDR
+target_to_host (from, nbytes, signextend, objfile)
+ char *from;
+ int nbytes;
+ int signextend; /* FIXME: Unused */
+ struct objfile *objfile;
+{
+ CORE_ADDR rtnval;
+
+ switch (nbytes)
+ {
+ case 8:
+ rtnval = bfd_get_64 (objfile->obfd, (bfd_byte *) from);
+ break;
+ case 4:
+ rtnval = bfd_get_32 (objfile->obfd, (bfd_byte *) from);
+ break;
+ case 2:
+ rtnval = bfd_get_16 (objfile->obfd, (bfd_byte *) from);
+ break;
+ case 1:
+ rtnval = bfd_get_8 (objfile->obfd, (bfd_byte *) from);
+ break;
+ default:
+ complain (&no_bfd_get_N, DIE_ID, DIE_NAME, nbytes);
+ rtnval = 0;
+ break;
+ }
+ return (rtnval);
+}
+
+/*
+
+ LOCAL FUNCTION
+
+ attribute_size -- compute size of data for a DWARF attribute
+
+ SYNOPSIS
+
+ static int attribute_size (unsigned int attr)
+
+ DESCRIPTION
+
+ Given a DWARF attribute in ATTR, compute the size of the first
+ piece of data associated with this attribute and return that
+ size.
+
+ Returns -1 for unrecognized attributes.
+
+ */
+
+static int
+attribute_size (attr)
+ unsigned int attr;
+{
+ int nbytes; /* Size of next data for this attribute */
+ unsigned short form; /* Form of the attribute */
+
+ form = FORM_FROM_ATTR (attr);
+ switch (form)
+ {
+ case FORM_STRING: /* A variable length field is next */
+ nbytes = 0;
+ break;
+ case FORM_DATA2: /* Next 2 byte field is the data itself */
+ case FORM_BLOCK2: /* Next 2 byte field is a block length */
+ nbytes = 2;
+ break;
+ case FORM_DATA4: /* Next 4 byte field is the data itself */
+ case FORM_BLOCK4: /* Next 4 byte field is a block length */
+ case FORM_REF: /* Next 4 byte field is a DIE offset */
+ nbytes = 4;
+ break;
+ case FORM_DATA8: /* Next 8 byte field is the data itself */
+ nbytes = 8;
+ break;
+ case FORM_ADDR: /* Next field size is target sizeof(void *) */
+ nbytes = TARGET_FT_POINTER_SIZE (objfile);
+ break;
+ default:
+ complain (&unknown_attribute_form, DIE_ID, DIE_NAME, form);
+ nbytes = -1;
+ break;
+ }
+ return (nbytes);
+}