/* Definitions for symbol file management in GDB.
- Copyright (C) 1992-2015 Free Software Foundation, Inc.
+ Copyright (C) 1992-2016 Free Software Foundation, Inc.
This file is part of GDB.
#if !defined (OBJFILES_H)
#define OBJFILES_H
+#include "hashtab.h"
#include "gdb_obstack.h" /* For obstack internals. */
#include "symfile.h" /* For struct psymbol_allocation_list. */
#include "progspace.h"
process startup code. Since we have no guarantee that the linked
in startup modules have any debugging information that gdb can use,
we need to avoid following frame pointers back into frames that might
- have been built in the startup code, as we might get hopelessly
+ have been built in the startup code, as we might get hopelessly
confused. However, we almost always have debugging information
available for main().
from user code don't go wandering off into the startup code. */
struct entry_info
- {
- /* The unrelocated value we should use for this objfile entry point. */
- CORE_ADDR entry_point;
+{
+ /* The unrelocated value we should use for this objfile entry point. */
+ CORE_ADDR entry_point;
- /* The index of the section in which the entry point appears. */
- int the_bfd_section_index;
+ /* The index of the section in which the entry point appears. */
+ int the_bfd_section_index;
- /* Set to 1 iff ENTRY_POINT contains a valid value. */
- unsigned entry_point_p : 1;
+ /* Set to 1 iff ENTRY_POINT contains a valid value. */
+ unsigned entry_point_p : 1;
- /* Set to 1 iff this object was initialized. */
- unsigned initialized : 1;
- };
+ /* Set to 1 iff this object was initialized. */
+ unsigned initialized : 1;
+};
/* Sections in an objfile. The section offsets are stored in the
OBJFILE. */
struct obj_section
- {
- struct bfd_section *the_bfd_section; /* BFD section pointer */
+{
+ /* BFD section pointer */
+ struct bfd_section *the_bfd_section;
- /* Objfile this section is part of. */
- struct objfile *objfile;
+ /* Objfile this section is part of. */
+ struct objfile *objfile;
- /* True if this "overlay section" is mapped into an "overlay region". */
- int ovly_mapped;
- };
+ /* True if this "overlay section" is mapped into an "overlay region". */
+ int ovly_mapped;
+};
/* Relocation offset applied to S. */
#define obj_section_offset(s) \
read, size of string table (if any), etc. */
struct objstats
- {
- int n_psyms; /* Number of partial symbols read */
- int n_syms; /* Number of full symbols read */
- int n_stabs; /* Number of ".stabs" read (if applicable) */
- int n_types; /* Number of types */
- int sz_strtab; /* Size of stringtable, (if applicable) */
- };
+{
+ /* Number of partial symbols read. */
+ int n_psyms;
+
+ /* Number of full symbols read. */
+ int n_syms;
+
+ /* Number of ".stabs" read (if applicable). */
+ int n_stabs;
+
+ /* Number of types. */
+ int n_types;
+
+ /* Size of stringtable, (if applicable). */
+ int sz_strtab;
+};
#define OBJSTAT(objfile, expr) (objfile -> stats.expr)
#define OBJSTATS struct objstats stats
/* The storage has an obstack of its own. */
struct obstack storage_obstack;
-
+
/* Byte cache for file names. */
struct bcache *filename_cache;
/* Byte cache for macros. */
+
struct bcache *macro_cache;
/* The gdbarch associated with the BFD. Note that this gdbarch is
both null-terminated; the first one is a mangled or linkage
name, and the second is the demangled name or just a zero byte
if the name doesn't demangle. */
+
struct htab *demangled_names_hash;
/* The per-objfile information about the entry point, the scope (file/func)
de-duplication is applied. Note in particular that this has only
a passing relationship with the actual size of the table above;
use minimal_symbol_count if you need the true size. */
+
int n_minsyms;
/* This is true if minimal symbols have already been read. Symbol
(see remote-vx.c). */
struct objfile
- {
+{
+ /* All struct objfile's are chained together by their next pointers.
+ The program space field "objfiles" (frequently referenced via
+ the macro "object_files") points to the first link in this chain. */
+
+ struct objfile *next;
+
+ /* The object file's original name as specified by the user,
+ made absolute, and tilde-expanded. However, it is not canonicalized
+ (i.e., it has not been passed through gdb_realpath).
+ This pointer is never NULL. This does not have to be freed; it is
+ guaranteed to have a lifetime at least as long as the objfile. */
+
+ char *original_name;
+
+ CORE_ADDR addr_low;
+
+ /* Some flag bits for this objfile.
+ The values are defined by OBJF_*. */
+
+ unsigned short flags;
- /* All struct objfile's are chained together by their next pointers.
- The program space field "objfiles" (frequently referenced via
- the macro "object_files") points to the first link in this
- chain. */
+ /* The program space associated with this objfile. */
- struct objfile *next;
+ struct program_space *pspace;
- /* The object file's original name as specified by the user,
- made absolute, and tilde-expanded. However, it is not canonicalized
- (i.e., it has not been passed through gdb_realpath).
- This pointer is never NULL. This does not have to be freed; it is
- guaranteed to have a lifetime at least as long as the objfile. */
+ /* List of compunits.
+ These are used to do symbol lookups and file/line-number lookups. */
- char *original_name;
+ struct compunit_symtab *compunit_symtabs;
- CORE_ADDR addr_low;
+ /* Each objfile points to a linked list of partial symtabs derived from
+ this file, one partial symtab structure for each compilation unit
+ (source file). */
- /* Some flag bits for this objfile.
- The values are defined by OBJF_*. */
+ struct partial_symtab *psymtabs;
- unsigned short flags;
+ /* Map addresses to the entries of PSYMTABS. It would be more efficient to
+ have a map per the whole process but ADDRMAP cannot selectively remove
+ its items during FREE_OBJFILE. This mapping is already present even for
+ PARTIAL_SYMTABs which still have no corresponding full SYMTABs read. */
- /* The program space associated with this objfile. */
+ struct addrmap *psymtabs_addrmap;
- struct program_space *pspace;
+ /* List of freed partial symtabs, available for re-use. */
- /* List of compunits.
- These are used to do symbol lookups and file/line-number lookups. */
+ struct partial_symtab *free_psymtabs;
- struct compunit_symtab *compunit_symtabs;
+ /* The object file's BFD. Can be null if the objfile contains only
+ minimal symbols, e.g. the run time common symbols for SunOS4. */
- /* Each objfile points to a linked list of partial symtabs derived from
- this file, one partial symtab structure for each compilation unit
- (source file). */
+ bfd *obfd;
- struct partial_symtab *psymtabs;
+ /* The per-BFD data. Note that this is treated specially if OBFD
+ is NULL. */
- /* Map addresses to the entries of PSYMTABS. It would be more efficient to
- have a map per the whole process but ADDRMAP cannot selectively remove
- its items during FREE_OBJFILE. This mapping is already present even for
- PARTIAL_SYMTABs which still have no corresponding full SYMTABs read. */
+ struct objfile_per_bfd_storage *per_bfd;
- struct addrmap *psymtabs_addrmap;
+ /* The modification timestamp of the object file, as of the last time
+ we read its symbols. */
- /* List of freed partial symtabs, available for re-use. */
+ long mtime;
- struct partial_symtab *free_psymtabs;
+ /* Obstack to hold objects that should be freed when we load a new symbol
+ table from this object file. */
- /* The object file's BFD. Can be null if the objfile contains only
- minimal symbols, e.g. the run time common symbols for SunOS4. */
+ struct obstack objfile_obstack;
- bfd *obfd;
+ /* A byte cache where we can stash arbitrary "chunks" of bytes that
+ will not change. */
- /* The per-BFD data. Note that this is treated specially if OBFD
- is NULL. */
+ struct psymbol_bcache *psymbol_cache; /* Byte cache for partial syms. */
- struct objfile_per_bfd_storage *per_bfd;
+ /* Vectors of all partial symbols read in from file. The actual data
+ is stored in the objfile_obstack. */
- /* The modification timestamp of the object file, as of the last time
- we read its symbols. */
+ struct psymbol_allocation_list global_psymbols;
+ struct psymbol_allocation_list static_psymbols;
- long mtime;
+ /* Structure which keeps track of functions that manipulate objfile's
+ of the same type as this objfile. I.e. the function to read partial
+ symbols for example. Note that this structure is in statically
+ allocated memory, and is shared by all objfiles that use the
+ object module reader of this type. */
- /* Obstack to hold objects that should be freed when we load a new symbol
- table from this object file. */
+ const struct sym_fns *sf;
- struct obstack objfile_obstack;
+ /* Per objfile data-pointers required by other GDB modules. */
- /* A byte cache where we can stash arbitrary "chunks" of bytes that
- will not change. */
+ REGISTRY_FIELDS;
- struct psymbol_bcache *psymbol_cache; /* Byte cache for partial syms. */
+ /* Set of relocation offsets to apply to each section.
+ The table is indexed by the_bfd_section->index, thus it is generally
+ as large as the number of sections in the binary.
+ The table is stored on the objfile_obstack.
- /* Vectors of all partial symbols read in from file. The actual data
- is stored in the objfile_obstack. */
+ These offsets indicate that all symbols (including partial and
+ minimal symbols) which have been read have been relocated by this
+ much. Symbols which are yet to be read need to be relocated by it. */
- struct psymbol_allocation_list global_psymbols;
- struct psymbol_allocation_list static_psymbols;
+ struct section_offsets *section_offsets;
+ int num_sections;
- /* Structure which keeps track of functions that manipulate objfile's
- of the same type as this objfile. I.e. the function to read partial
- symbols for example. Note that this structure is in statically
- allocated memory, and is shared by all objfiles that use the
- object module reader of this type. */
+ /* Indexes in the section_offsets array. These are initialized by the
+ *_symfile_offsets() family of functions (som_symfile_offsets,
+ xcoff_symfile_offsets, default_symfile_offsets). In theory they
+ should correspond to the section indexes used by bfd for the
+ current objfile. The exception to this for the time being is the
+ SOM version. */
- const struct sym_fns *sf;
+ int sect_index_text;
+ int sect_index_data;
+ int sect_index_bss;
+ int sect_index_rodata;
- /* Per objfile data-pointers required by other GDB modules. */
+ /* These pointers are used to locate the section table, which
+ among other things, is used to map pc addresses into sections.
+ SECTIONS points to the first entry in the table, and
+ SECTIONS_END points to the first location past the last entry
+ in the table. The table is stored on the objfile_obstack. The
+ sections are indexed by the BFD section index; but the
+ structure data is only valid for certain sections
+ (e.g. non-empty, SEC_ALLOC). */
- REGISTRY_FIELDS;
+ struct obj_section *sections, *sections_end;
- /* Set of relocation offsets to apply to each section.
- The table is indexed by the_bfd_section->index, thus it is generally
- as large as the number of sections in the binary.
- The table is stored on the objfile_obstack.
+ /* GDB allows to have debug symbols in separate object files. This is
+ used by .gnu_debuglink, ELF build id note and Mach-O OSO.
+ Although this is a tree structure, GDB only support one level
+ (ie a separate debug for a separate debug is not supported). Note that
+ separate debug object are in the main chain and therefore will be
+ visited by ALL_OBJFILES & co iterators. Separate debug objfile always
+ has a non-nul separate_debug_objfile_backlink. */
- These offsets indicate that all symbols (including partial and
- minimal symbols) which have been read have been relocated by this
- much. Symbols which are yet to be read need to be relocated by it. */
+ /* Link to the first separate debug object, if any. */
- struct section_offsets *section_offsets;
- int num_sections;
+ struct objfile *separate_debug_objfile;
- /* Indexes in the section_offsets array. These are initialized by the
- *_symfile_offsets() family of functions (som_symfile_offsets,
- xcoff_symfile_offsets, default_symfile_offsets). In theory they
- should correspond to the section indexes used by bfd for the
- current objfile. The exception to this for the time being is the
- SOM version. */
+ /* If this is a separate debug object, this is used as a link to the
+ actual executable objfile. */
- int sect_index_text;
- int sect_index_data;
- int sect_index_bss;
- int sect_index_rodata;
+ struct objfile *separate_debug_objfile_backlink;
- /* These pointers are used to locate the section table, which
- among other things, is used to map pc addresses into sections.
- SECTIONS points to the first entry in the table, and
- SECTIONS_END points to the first location past the last entry
- in the table. The table is stored on the objfile_obstack. The
- sections are indexed by the BFD section index; but the
- structure data is only valid for certain sections
- (e.g. non-empty, SEC_ALLOC). */
+ /* If this is a separate debug object, this is a link to the next one
+ for the same executable objfile. */
- struct obj_section *sections, *sections_end;
+ struct objfile *separate_debug_objfile_link;
- /* GDB allows to have debug symbols in separate object files. This is
- used by .gnu_debuglink, ELF build id note and Mach-O OSO.
- Although this is a tree structure, GDB only support one level
- (ie a separate debug for a separate debug is not supported). Note that
- separate debug object are in the main chain and therefore will be
- visited by ALL_OBJFILES & co iterators. Separate debug objfile always
- has a non-nul separate_debug_objfile_backlink. */
+ /* Place to stash various statistics about this objfile. */
- /* Link to the first separate debug object, if any. */
- struct objfile *separate_debug_objfile;
+ OBJSTATS;
- /* If this is a separate debug object, this is used as a link to the
- actual executable objfile. */
- struct objfile *separate_debug_objfile_backlink;
+ /* A linked list of symbols created when reading template types or
+ function templates. These symbols are not stored in any symbol
+ table, so we have to keep them here to relocate them
+ properly. */
- /* If this is a separate debug object, this is a link to the next one
- for the same executable objfile. */
- struct objfile *separate_debug_objfile_link;
+ struct symbol *template_symbols;
- /* Place to stash various statistics about this objfile. */
- OBJSTATS;
+ /* Associate a static link (struct dynamic_prop *) to all blocks (struct
+ block *) that have one.
- /* A linked list of symbols created when reading template types or
- function templates. These symbols are not stored in any symbol
- table, so we have to keep them here to relocate them
- properly. */
- struct symbol *template_symbols;
- };
+ In the context of nested functions (available in Pascal, Ada and GNU C,
+ for instance), a static link (as in DWARF's DW_AT_static_link attribute)
+ for a function is a way to get the frame corresponding to the enclosing
+ function.
+
+ Very few blocks have a static link, so it's more memory efficient to
+ store these here rather than in struct block. Static links must be
+ allocated on the objfile's obstack. */
+ htab_t static_links;
+};
/* Defines for the objfile flag word. */
extern const char *objfile_debug_name (const struct objfile *objfile);
+/* Return the name of the file format of OBJFILE if the file has been opened,
+ otherwise return NULL. */
+
+const char *objfile_flavour_name (struct objfile *objfile);
+
/* Set the objfile's notion of the "main" name and language. */
extern void set_objfile_main_name (struct objfile *objfile,
const char *name, enum language lang);
+extern void objfile_register_static_link
+ (struct objfile *objfile,
+ const struct block *block,
+ const struct dynamic_prop *static_link);
+
+extern const struct dynamic_prop *objfile_lookup_static_link
+ (struct objfile *objfile, const struct block *block);
+
#endif /* !defined (OBJFILES_H) */
projects / deliverable / binutils-gdb.git / blobdiff