/* Definitions for symbol file management in GDB.
- Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
- 2002, 2003, 2004, 2007, 2008, 2009 Free Software Foundation, Inc.
+ Copyright (C) 1992-2018 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 "objfile-flags.h"
+#include "symfile.h"
+#include "progspace.h"
+#include "registry.h"
+#include "gdb_bfd.h"
+#include <vector>
struct bcache;
struct htab;
-struct symtab;
struct objfile_data;
+struct partial_symbol;
/* This structure maintains information on a per-objfile basis about the
"entry point" of the objfile, and the scope within which the entry point
the debugging information, where these values are the starting
address (inclusive) and ending address (exclusive) of the
instruction space in the executable which correspond to the
- "startup file", I.E. crt0.o in most cases. This file is assumed to
+ "startup file", i.e. crt0.o in most cases. This file is assumed to
be a startup file and frames with pc's inside it are treated as
nonexistent. Setting these variables is necessary so that
backtraces do not fly off the bottom of the stack.
NOTE: cagney/2003-09-09: It turns out that this "traditional"
method doesn't work. Corinna writes: ``It turns out that the call
to test for "inside entry file" destroys a meaningful backtrace
- under some conditions. E. g. the backtrace tests in the asm-source
+ under some conditions. E.g. the backtrace tests in the asm-source
testcase are broken for some targets. In this test the functions
are all implemented as part of one file and the testcase is not
necessarily linked with a start file (depending on the target).
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 value we should use for this objects entry point.
- The illegal/unknown value needs to be something other than 0, ~0
- for instance, which is much less likely than 0. */
+ /* The index of the section in which the entry point appears. */
+ int the_bfd_section_index;
- CORE_ADDR entry_point;
+ /* Set to 1 iff ENTRY_POINT contains a valid value. */
+ unsigned entry_point_p : 1;
-#define INVALID_ENTRY_POINT (~0) /* ~0 will not be in any file, we hope. */
-
- };
+ /* 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) \
- (((s)->objfile->section_offsets)->offsets[(s)->the_bfd_section->index])
+ (((s)->objfile->section_offsets)->offsets[gdb_bfd_section_index ((s)->objfile->obfd, (s)->the_bfd_section)])
/* The memory address of section S (vma + offset). */
#define obj_section_addr(s) \
- (bfd_get_section_vma ((s)->objfile->abfd, s->the_bfd_section) \
+ (bfd_get_section_vma ((s)->objfile->obfd, s->the_bfd_section) \
+ obj_section_offset (s))
/* The one-passed-the-end memory address of section S
(vma + size + offset). */
#define obj_section_endaddr(s) \
- (bfd_get_section_vma ((s)->objfile->abfd, s->the_bfd_section) \
+ (bfd_get_section_vma ((s)->objfile->obfd, s->the_bfd_section) \
+ bfd_get_section_size ((s)->the_bfd_section) \
+ obj_section_offset (s))
/* The "objstats" structure provides a place for gdb to record some
interesting information about its internal state at runtime, on a
per objfile basis, such as information about the number of symbols
- read, size of string table (if any), etc. */
+ read, size of string table (if any), etc. */
struct objstats
- {
- int n_minsyms; /* Number of minimal symbols read */
- 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 = 0;
+
+ /* Number of full symbols read. */
+ int n_syms = 0;
+
+ /* Number of ".stabs" read (if applicable). */
+ int n_stabs = 0;
+
+ /* Number of types. */
+ int n_types = 0;
+
+ /* Size of stringtable, (if applicable). */
+ int sz_strtab = 0;
+};
#define OBJSTAT(objfile, expr) (objfile -> stats.expr)
#define OBJSTATS struct objstats stats
/* Number of entries in the minimal symbol hash table. */
#define MINIMAL_SYMBOL_HASH_SIZE 2039
-/* Master structure for keeping track of each file from which
- gdb reads symbols. There are several ways these get allocated: 1.
- The main symbol file, symfile_objfile, set by the symbol-file command,
- 2. Additional symbol files added by the add-symbol-file command,
- 3. Shared library objfiles, added by ADD_SOLIB, 4. symbol files
- for modules that were loaded when GDB attached to a remote system
- (see remote-vx.c). */
+/* Some objfile data is hung off the BFD. This enables sharing of the
+ data across all objfiles using the BFD. The data is stored in an
+ instance of this structure, and associated with the BFD using the
+ registry system. */
-struct objfile
- {
+struct objfile_per_bfd_storage
+{
+ objfile_per_bfd_storage ()
+ : minsyms_read (false)
+ {}
+
+ /* The storage has an obstack of its own. */
+
+ auto_obstack storage_obstack;
+
+ /* Byte cache for file names. */
+
+ bcache *filename_cache = NULL;
- /* All struct objfile's are chained together by their next pointers.
- The global variable "object_files" points to the first link in this
- chain.
+ /* Byte cache for macros. */
- FIXME: There is a problem here if the objfile is reusable, and if
- multiple users are to be supported. The problem is that the objfile
- list is linked through a member of the objfile struct itself, which
- is only valid for one gdb process. The list implementation needs to
- be changed to something like:
+ bcache *macro_cache = NULL;
- struct list {struct list *next; struct objfile *objfile};
+ /* The gdbarch associated with the BFD. Note that this gdbarch is
+ determined solely from BFD information, without looking at target
+ information. The gdbarch determined from a running target may
+ differ from this e.g. with respect to register types and names. */
- where the list structure is completely maintained separately within
- each gdb process. */
+ struct gdbarch *gdbarch = NULL;
- struct objfile *next;
+ /* Hash table for mapping symbol names to demangled names. Each
+ entry in the hash table is actually two consecutive strings,
+ 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. */
- /* The object file's name, tilde-expanded and absolute.
- Malloc'd; free it if you free this struct. */
+ htab *demangled_names_hash = NULL;
- char *name;
+ /* The per-objfile information about the entry point, the scope (file/func)
+ containing the entry point, and the scope of the user's main() func. */
- /* Some flag bits for this objfile. */
+ entry_info ei {};
- unsigned short flags;
+ /* The name and language of any "main" found in this objfile. The
+ name can be NULL, which means that the information was not
+ recorded. */
- /* Each objfile points to a linked list of symtabs derived from this file,
- one symtab structure for each compilation unit (source file). Each link
- in the symtab list contains a backpointer to this objfile. */
+ const char *name_of_main = NULL;
+ enum language language_of_main = language_unknown;
- struct symtab *symtabs;
+ /* Each file contains a pointer to an array of minimal symbols for all
+ global symbols that are defined within the file. The array is
+ terminated by a "null symbol", one that has a NULL pointer for the
+ name and a zero value for the address. This makes it easy to walk
+ through the array when passed a pointer to somewhere in the middle
+ of it. There is also a count of the number of symbols, which does
+ not include the terminating null symbol. The array itself, as well
+ as all the data that it points to, should be allocated on the
+ objfile_obstack for this file. */
- /* Each objfile points to a linked list of partial symtabs derived from
- this file, one partial symtab structure for each compilation unit
- (source file). */
+ minimal_symbol *msymbols = NULL;
+ int minimal_symbol_count = 0;
- struct partial_symtab *psymtabs;
+ /* The number of minimal symbols read, before any minimal symbol
+ 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. */
- /* 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. */
+ int n_minsyms = 0;
- struct addrmap *psymtabs_addrmap;
+ /* This is true if minimal symbols have already been read. Symbol
+ readers can use this to bypass minimal symbol reading. Also, the
+ minimal symbol table management code in minsyms.c uses this to
+ suppress new minimal symbols. You might think that MSYMBOLS or
+ MINIMAL_SYMBOL_COUNT could be used for this, but it is possible
+ for multiple readers to install minimal symbols into a given
+ per-BFD. */
- /* List of freed partial symtabs, available for re-use */
+ bool minsyms_read : 1;
- struct partial_symtab *free_psymtabs;
+ /* This is a hash table used to index the minimal symbols by name. */
- /* The object file's BFD. Can be null if the objfile contains only
- minimal symbols, e.g. the run time common symbols for SunOS4. */
+ minimal_symbol *msymbol_hash[MINIMAL_SYMBOL_HASH_SIZE] {};
- bfd *obfd;
+ /* This hash table is used to index the minimal symbols by their
+ demangled names. */
- /* The gdbarch associated with the BFD. Note that this gdbarch is
- determined solely from BFD information, without looking at target
- information. The gdbarch determined from a running target may
- differ from this e.g. with respect to register types and names. */
+ minimal_symbol *msymbol_demangled_hash[MINIMAL_SYMBOL_HASH_SIZE] {};
- struct gdbarch *gdbarch;
+ /* All the different languages of symbols found in the demangled
+ hash table. A flat/vector-based map is more efficient than a map
+ or hash table here, since this will only usually contain zero or
+ one entries. */
+ std::vector<enum language> demangled_hash_languages;
+};
- /* The modification timestamp of the object file, as of the last time
- we read its symbols. */
+/* Master structure for keeping track of each file from which
+ gdb reads symbols. There are several ways these get allocated: 1.
+ The main symbol file, symfile_objfile, set by the symbol-file command,
+ 2. Additional symbol files added by the add-symbol-file command,
+ 3. Shared library objfiles, added by ADD_SOLIB, 4. symbol files
+ for modules that were loaded when GDB attached to a remote system
+ (see remote-vx.c). */
- long mtime;
+struct objfile
+{
+ objfile (bfd *, const char *, objfile_flags);
+ ~objfile ();
- /* Obstack to hold objects that should be freed when we load a new symbol
- table from this object file. */
+ DISABLE_COPY_AND_ASSIGN (objfile);
- struct obstack objfile_obstack;
+ /* 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. */
- /* A byte cache where we can stash arbitrary "chunks" of bytes that
- will not change. */
+ struct objfile *next = nullptr;
- struct bcache *psymbol_cache; /* Byte cache for partial syms */
- struct bcache *macro_cache; /* Byte cache for macros */
+ /* 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. */
- /* Hash table for mapping symbol names to demangled names. Each
- entry in the hash table is actually two consecutive strings,
- 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;
+ char *original_name = nullptr;
- /* Vectors of all partial symbols read in from file. The actual data
- is stored in the objfile_obstack. */
+ CORE_ADDR addr_low = 0;
- struct psymbol_allocation_list global_psymbols;
- struct psymbol_allocation_list static_psymbols;
+ /* Some flag bits for this objfile. */
- /* Each file contains a pointer to an array of minimal symbols for all
- global symbols that are defined within the file. The array is terminated
- by a "null symbol", one that has a NULL pointer for the name and a zero
- value for the address. This makes it easy to walk through the array
- when passed a pointer to somewhere in the middle of it. There is also
- a count of the number of symbols, which does not include the terminating
- null symbol. The array itself, as well as all the data that it points
- to, should be allocated on the objfile_obstack for this file. */
+ objfile_flags flags;
- struct minimal_symbol *msymbols;
- int minimal_symbol_count;
+ /* The program space associated with this objfile. */
- /* This is a hash table used to index the minimal symbols by name. */
+ struct program_space *pspace;
- struct minimal_symbol *msymbol_hash[MINIMAL_SYMBOL_HASH_SIZE];
+ /* List of compunits.
+ These are used to do symbol lookups and file/line-number lookups. */
- /* This hash table is used to index the minimal symbols by their
- demangled names. */
+ struct compunit_symtab *compunit_symtabs = nullptr;
- struct minimal_symbol *msymbol_demangled_hash[MINIMAL_SYMBOL_HASH_SIZE];
+ /* Each objfile points to a linked list of partial symtabs derived from
+ this file, one partial symtab structure for each compilation unit
+ (source file). */
- /* 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. */
+ struct partial_symtab *psymtabs = nullptr;
- struct sym_fns *sf;
+ /* 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 per-objfile information about the entry point, the scope (file/func)
- containing the entry point, and the scope of the user's main() func. */
+ struct addrmap *psymtabs_addrmap = nullptr;
- struct entry_info ei;
+ /* List of freed partial symtabs, available for re-use. */
- /* Information about stabs. Will be filled in with a dbx_symfile_info
- struct by those readers that need it. */
- /* NOTE: cagney/2004-10-23: This has been replaced by per-objfile
- data points implemented using "data" and "num_data" below. For
- an example of how to use this replacement, see "objfile_data"
- in "mips-tdep.c". */
+ struct partial_symtab *free_psymtabs = nullptr;
- struct dbx_symfile_info *deprecated_sym_stab_info;
+ /* The object file's BFD. Can be null if the objfile contains only
+ minimal symbols, e.g. the run time common symbols for SunOS4. */
- /* Hook for information for use by the symbol reader (currently used
- for information shared by sym_init and sym_read). It is
- typically a pointer to malloc'd memory. The symbol reader's finish
- function is responsible for freeing the memory thusly allocated. */
- /* NOTE: cagney/2004-10-23: This has been replaced by per-objfile
- data points implemented using "data" and "num_data" below. For
- an example of how to use this replacement, see "objfile_data"
- in "mips-tdep.c". */
+ bfd *obfd;
- void *deprecated_sym_private;
+ /* The per-BFD data. Note that this is treated specially if OBFD
+ is NULL. */
- /* Per objfile data-pointers required by other GDB modules. */
- /* FIXME: kettenis/20030711: This mechanism could replace
- deprecated_sym_stab_info and deprecated_sym_private
- entirely. */
+ struct objfile_per_bfd_storage *per_bfd = nullptr;
- void **data;
- unsigned num_data;
+ /* The modification timestamp of the object file, as of the last time
+ we read its symbols. */
- /* Set of relocation offsets to apply to each section.
- Currently on the objfile_obstack (which makes no sense, but I'm
- not sure it's harming anything).
+ long mtime = 0;
- 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. */
+ /* Obstack to hold objects that should be freed when we load a new symbol
+ table from this object file. */
- struct section_offsets *section_offsets;
- int num_sections;
+ struct obstack objfile_obstack {};
- /* 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. */
+ /* A byte cache where we can stash arbitrary "chunks" of bytes that
+ will not change. */
- int sect_index_text;
- int sect_index_data;
- int sect_index_bss;
- int sect_index_rodata;
+ struct psymbol_bcache *psymbol_cache;
- /* 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. Currently the table is stored on the
- objfile_obstack (which makes no sense, but I'm not sure it's
- harming anything). */
+ /* Map symbol addresses to the partial symtab that defines the
+ object at that address. */
- struct obj_section
- *sections, *sections_end;
+ std::vector<std::pair<CORE_ADDR, partial_symtab *>> psymbol_map;
- /* Link to objfile that contains the debug symbols for this one.
- One is loaded if this file has an debug link to an existing
- debug file with the right checksum */
- struct objfile *separate_debug_objfile;
+ /* Vectors of all partial symbols read in from file. The actual data
+ is stored in the objfile_obstack. */
- /* If this is a separate debug object, this is used as a link to the
- actual executable objfile. */
- struct objfile *separate_debug_objfile_backlink;
-
- /* Place to stash various statistics about this objfile */
- OBJSTATS;
+ std::vector<partial_symbol *> global_psymbols;
+ std::vector<partial_symbol *> static_psymbols;
- /* A symtab that the C++ code uses to stash special symbols
- associated to namespaces. */
+ /* 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. */
- /* FIXME/carlton-2003-06-27: Delete this in a few years once
- "possible namespace symbols" go away. */
- struct symtab *cp_namespace_symtab;
- };
+ const struct sym_fns *sf = nullptr;
-/* Defines for the objfile flag word. */
+ /* Per objfile data-pointers required by other GDB modules. */
-/* When an object file has its functions reordered (currently Irix-5.2
- shared libraries exhibit this behaviour), we will need an expensive
- algorithm to locate a partial symtab or symtab via an address.
- To avoid this penalty for normal object files, we use this flag,
- whose setting is determined upon symbol table read in. */
+ REGISTRY_FIELDS {};
-#define OBJF_REORDERED (1 << 0) /* Functions are reordered */
+ /* 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.
-/* Distinguish between an objfile for a shared library and a "vanilla"
- objfile. (If not set, the objfile may still actually be a solib.
- This can happen if the user created the objfile by using the
- add-symbol-file command. GDB doesn't in that situation actually
- check whether the file is a solib. Rather, the target's
- implementation of the solib interface is responsible for setting
- this flag when noticing solibs used by an inferior.) */
-
-#define OBJF_SHARED (1 << 1) /* From a shared library */
+ 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. */
-/* User requested that this objfile be read in it's entirety. */
+ struct section_offsets *section_offsets = nullptr;
+ int num_sections = 0;
-#define OBJF_READNOW (1 << 2) /* Immediate full read */
+ /* 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.
-/* This objfile was created because the user explicitly caused it
- (e.g., used the add-symbol-file command). This bit offers a way
- for run_command to remove old objfile entries which are no longer
- valid (i.e., are associated with an old inferior), but to preserve
- ones that the user explicitly loaded via the add-symbol-file
- command. */
+ These are initialized to -1 so that we can later detect if they
+ are used w/o being properly assigned to. */
-#define OBJF_USERLOADED (1 << 3) /* User loaded */
+ int sect_index_text = -1;
+ int sect_index_data = -1;
+ int sect_index_bss = -1;
+ int sect_index_rodata = -1;
-/* The bfd of this objfile is used outside of the objfile (e.g. by solib).
- Do not try to free it. */
+ /* 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). */
-#define OBJF_KEEPBFD (1 << 4) /* Do not delete bfd */
+ struct obj_section *sections = nullptr;
+ struct obj_section *sections_end = nullptr;
+ /* 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. */
-/* The object file that the main symbol table was loaded from (e.g. the
- argument to the "symbol-file" or "file" command). */
+ /* Link to the first separate debug object, if any. */
-extern struct objfile *symfile_objfile;
+ struct objfile *separate_debug_objfile = nullptr;
-/* The object file that contains the runtime common minimal symbols
- for SunOS4. Note that this objfile has no associated BFD. */
+ /* If this is a separate debug object, this is used as a link to the
+ actual executable objfile. */
-extern struct objfile *rt_common_objfile;
+ struct objfile *separate_debug_objfile_backlink = nullptr;
-/* When we need to allocate a new type, we need to know which objfile_obstack
- to allocate the type on, since there is one for each objfile. The places
- where types are allocated are deeply buried in function call hierarchies
- which know nothing about objfiles, so rather than trying to pass a
- particular objfile down to them, we just do an end run around them and
- set current_objfile to be whatever objfile we expect to be using at the
- time types are being allocated. For instance, when we start reading
- symbols for a particular objfile, we set current_objfile to point to that
- objfile, and when we are done, we set it back to NULL, to ensure that we
- never put a type someplace other than where we are expecting to put it.
- FIXME: Maybe we should review the entire type handling system and
- see if there is a better way to avoid this problem. */
+ /* If this is a separate debug object, this is a link to the next one
+ for the same executable objfile. */
-extern struct objfile *current_objfile;
+ struct objfile *separate_debug_objfile_link = nullptr;
-/* All known objfiles are kept in a linked list. This points to the
- root of this list. */
+ /* Place to stash various statistics about this objfile. */
-extern struct objfile *object_files;
+ OBJSTATS;
-/* Declarations for functions defined in objfiles.c */
+ /* 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. */
-extern struct objfile *allocate_objfile (bfd *, int);
+ struct symbol *template_symbols = nullptr;
-extern struct gdbarch *get_objfile_arch (struct objfile *);
+ /* Associate a static link (struct dynamic_prop *) to all blocks (struct
+ block *) that have one.
-extern void init_entry_point_info (struct objfile *);
+ 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 {};
+};
+
+/* Declarations for functions defined in objfiles.c */
+
+extern struct gdbarch *get_objfile_arch (const struct objfile *);
+
+extern int entry_point_address_query (CORE_ADDR *entry_p);
extern CORE_ADDR entry_point_address (void);
-extern int build_objfile_section_table (struct objfile *);
+extern void build_objfile_section_table (struct objfile *);
-extern void terminate_minimal_symbol_table (struct objfile *objfile);
+extern struct objfile *objfile_separate_debug_iterate (const struct objfile *,
+ const struct objfile *);
extern void put_objfile_before (struct objfile *, struct objfile *);
-extern void objfile_to_front (struct objfile *);
+extern void add_separate_debug_objfile (struct objfile *, struct objfile *);
extern void unlink_objfile (struct objfile *);
-extern void free_objfile (struct objfile *);
-
-extern struct cleanup *make_cleanup_free_objfile (struct objfile *);
+extern void free_objfile_separate_debug (struct objfile *);
extern void free_all_objfiles (void);
-extern void objfile_relocate (struct objfile *, struct section_offsets *);
+extern void objfile_relocate (struct objfile *, const struct section_offsets *);
+extern void objfile_rebase (struct objfile *, CORE_ADDR);
+
+extern int objfile_has_partial_symbols (struct objfile *objfile);
+
+extern int objfile_has_full_symbols (struct objfile *objfile);
+
+extern int objfile_has_symbols (struct objfile *objfile);
extern int have_partial_symbols (void);
extern int have_full_symbols (void);
+extern void objfile_set_sym_fns (struct objfile *objfile,
+ const struct sym_fns *sf);
+
+extern void objfiles_changed (void);
+
+extern int is_addr_in_objfile (CORE_ADDR addr, const struct objfile *objfile);
+
+/* Return true if ADDRESS maps into one of the sections of a
+ OBJF_SHARED objfile of PSPACE and false otherwise. */
+
+extern int shared_objfile_contains_address_p (struct program_space *pspace,
+ CORE_ADDR address);
+
/* This operation deletes all objfile entries that represent solibs that
weren't explicitly loaded by the user, via e.g., the add-symbol-file
- command.
- */
+ command. */
+
extern void objfile_purge_solibs (void);
/* Functions for dealing with the minimal symbol table, really a misc
extern struct obj_section *find_pc_section (CORE_ADDR pc);
-extern int in_plt_section (CORE_ADDR, char *);
+/* Return non-zero if PC is in a section called NAME. */
+extern int pc_in_section (CORE_ADDR, const char *);
+
+/* Return non-zero if PC is in a SVR4-style procedure linkage table
+ section. */
+
+static inline int
+in_plt_section (CORE_ADDR pc)
+{
+ return pc_in_section (pc, ".plt");
+}
/* Keep a registry of per-objfile data-pointers required by other GDB
modules. */
-
-extern const struct objfile_data *register_objfile_data (void);
-extern const struct objfile_data *register_objfile_data_with_cleanup
- (void (*cleanup) (struct objfile *, void *));
-extern void clear_objfile_data (struct objfile *objfile);
-extern void set_objfile_data (struct objfile *objfile,
- const struct objfile_data *data, void *value);
-extern void *objfile_data (struct objfile *objfile,
- const struct objfile_data *data);
+DECLARE_REGISTRY(objfile);
+
+/* In normal use, the section map will be rebuilt by find_pc_section
+ if objfiles have been added, removed or relocated since it was last
+ called. Calling inhibit_section_map_updates will inhibit this
+ behavior until the returned scoped_restore object is destroyed. If
+ you call inhibit_section_map_updates you must ensure that every
+ call to find_pc_section in the inhibited region relates to a
+ section that is already in the section map and has not since been
+ removed or relocated. */
+extern scoped_restore_tmpl<int> inhibit_section_map_updates
+ (struct program_space *pspace);
+
+extern void default_iterate_over_objfiles_in_search_order
+ (struct gdbarch *gdbarch,
+ iterate_over_objfiles_in_search_order_cb_ftype *cb,
+ void *cb_data, struct objfile *current_objfile);
\f
-/* Traverse all object files. ALL_OBJFILES_SAFE works even if you delete
- the objfile during the traversal. */
+/* Traverse all object files in the current program space.
+ ALL_OBJFILES_SAFE works even if you delete the objfile during the
+ traversal. */
+
+/* Traverse all object files in program space SS. */
-#define ALL_OBJFILES(obj) \
- for ((obj) = object_files; (obj) != NULL; (obj) = (obj)->next)
+#define ALL_PSPACE_OBJFILES(ss, obj) \
+ for ((obj) = ss->objfiles; (obj) != NULL; (obj) = (obj)->next)
-#define ALL_OBJFILES_SAFE(obj,nxt) \
- for ((obj) = object_files; \
+#define ALL_OBJFILES(obj) \
+ for ((obj) = current_program_space->objfiles; \
+ (obj) != NULL; \
+ (obj) = (obj)->next)
+
+#define ALL_OBJFILES_SAFE(obj,nxt) \
+ for ((obj) = current_program_space->objfiles; \
(obj) != NULL? ((nxt)=(obj)->next,1) :0; \
(obj) = (nxt))
/* Traverse all symtabs in one objfile. */
-#define ALL_OBJFILE_SYMTABS(objfile, s) \
- for ((s) = (objfile) -> symtabs; (s) != NULL; (s) = (s) -> next)
+#define ALL_OBJFILE_FILETABS(objfile, cu, s) \
+ ALL_OBJFILE_COMPUNITS (objfile, cu) \
+ ALL_COMPUNIT_FILETABS (cu, s)
-/* Traverse all psymtabs in one objfile. */
+/* Traverse all compunits in one objfile. */
-#define ALL_OBJFILE_PSYMTABS(objfile, p) \
- for ((p) = (objfile) -> psymtabs; (p) != NULL; (p) = (p) -> next)
+#define ALL_OBJFILE_COMPUNITS(objfile, cu) \
+ for ((cu) = (objfile) -> compunit_symtabs; (cu) != NULL; (cu) = (cu) -> next)
/* Traverse all minimal symbols in one objfile. */
-#define ALL_OBJFILE_MSYMBOLS(objfile, m) \
- for ((m) = (objfile) -> msymbols; SYMBOL_LINKAGE_NAME(m) != NULL; (m)++)
+#define ALL_OBJFILE_MSYMBOLS(objfile, m) \
+ for ((m) = (objfile)->per_bfd->msymbols; \
+ MSYMBOL_LINKAGE_NAME (m) != NULL; \
+ (m)++)
-/* Traverse all symtabs in all objfiles. */
+/* Traverse all symtabs in all objfiles in the current symbol
+ space. */
-#define ALL_SYMTABS(objfile, s) \
- ALL_OBJFILES (objfile) \
- ALL_OBJFILE_SYMTABS (objfile, s)
+#define ALL_FILETABS(objfile, ps, s) \
+ ALL_OBJFILES (objfile) \
+ ALL_OBJFILE_FILETABS (objfile, ps, s)
-/* Traverse all symtabs in all objfiles, skipping included files
- (which share a blockvector with their primary symtab). */
+/* Traverse all compunits in all objfiles in the current program space. */
-#define ALL_PRIMARY_SYMTABS(objfile, s) \
+#define ALL_COMPUNITS(objfile, cu) \
ALL_OBJFILES (objfile) \
- ALL_OBJFILE_SYMTABS (objfile, s) \
- if ((s)->primary)
-
-/* Traverse all psymtabs in all objfiles. */
-
-#define ALL_PSYMTABS(objfile, p) \
- ALL_OBJFILES (objfile) \
- ALL_OBJFILE_PSYMTABS (objfile, p)
+ ALL_OBJFILE_COMPUNITS (objfile, cu)
-/* Traverse all minimal symbols in all objfiles. */
+/* Traverse all minimal symbols in all objfiles in the current symbol
+ space. */
#define ALL_MSYMBOLS(objfile, m) \
ALL_OBJFILES (objfile) \
ALL_OBJFILE_MSYMBOLS (objfile, m)
#define ALL_OBJFILE_OSECTIONS(objfile, osect) \
- for (osect = objfile->sections; osect < objfile->sections_end; osect++)
-
-#define ALL_OBJSECTIONS(objfile, osect) \
- ALL_OBJFILES (objfile) \
+ for (osect = objfile->sections; osect < objfile->sections_end; osect++) \
+ if (osect->the_bfd_section == NULL) \
+ { \
+ /* Nothing. */ \
+ } \
+ else
+
+/* Traverse all obj_sections in all objfiles in the current program
+ space.
+
+ Note that this detects a "break" in the inner loop, and exits
+ immediately from the outer loop as well, thus, client code doesn't
+ need to know that this is implemented with a double for. The extra
+ hair is to make sure that a "break;" stops the outer loop iterating
+ as well, and both OBJFILE and OSECT are left unmodified:
+
+ - The outer loop learns about the inner loop's end condition, and
+ stops iterating if it detects the inner loop didn't reach its
+ end. In other words, the outer loop keeps going only if the
+ inner loop reached its end cleanly [(osect) ==
+ (objfile)->sections_end].
+
+ - OSECT is initialized in the outer loop initialization
+ expressions, such as if the inner loop has reached its end, so
+ the check mentioned above succeeds the first time.
+
+ - The trick to not clearing OBJFILE on a "break;" is, in the outer
+ loop's loop expression, advance OBJFILE, but iff the inner loop
+ reached its end. If not, there was a "break;", so leave OBJFILE
+ as is; the outer loop's conditional will break immediately as
+ well (as OSECT will be different from OBJFILE->sections_end). */
+
+#define ALL_OBJSECTIONS(objfile, osect) \
+ for ((objfile) = current_program_space->objfiles, \
+ (objfile) != NULL ? ((osect) = (objfile)->sections_end) : 0; \
+ (objfile) != NULL \
+ && (osect) == (objfile)->sections_end; \
+ ((osect) == (objfile)->sections_end \
+ ? ((objfile) = (objfile)->next, \
+ (objfile) != NULL ? (osect) = (objfile)->sections_end : 0) \
+ : 0)) \
ALL_OBJFILE_OSECTIONS (objfile, osect)
#define SECT_OFF_DATA(objfile) \
((objfile->sect_index_data == -1) \
- ? (internal_error (__FILE__, __LINE__, _("sect_index_data not initialized")), -1) \
+ ? (internal_error (__FILE__, __LINE__, \
+ _("sect_index_data not initialized")), -1) \
: objfile->sect_index_data)
#define SECT_OFF_RODATA(objfile) \
((objfile->sect_index_rodata == -1) \
- ? (internal_error (__FILE__, __LINE__, _("sect_index_rodata not initialized")), -1) \
+ ? (internal_error (__FILE__, __LINE__, \
+ _("sect_index_rodata not initialized")), -1) \
: objfile->sect_index_rodata)
#define SECT_OFF_TEXT(objfile) \
((objfile->sect_index_text == -1) \
- ? (internal_error (__FILE__, __LINE__, _("sect_index_text not initialized")), -1) \
+ ? (internal_error (__FILE__, __LINE__, \
+ _("sect_index_text not initialized")), -1) \
: objfile->sect_index_text)
/* Sometimes the .bss section is missing from the objfile, so we don't
- want to die here. Let the users of SECT_OFF_BSS deal with an
- uninitialized section index. */
+ want to die here. Let the users of SECT_OFF_BSS deal with an
+ uninitialized section index. */
#define SECT_OFF_BSS(objfile) (objfile)->sect_index_bss
/* Answer whether there is more than one object file loaded. */
#define MULTI_OBJFILE_P() (object_files && object_files->next)
+/* Reset the per-BFD storage area on OBJ. */
+
+void set_objfile_per_bfd (struct objfile *obj);
+
+/* Return canonical name for OBJFILE.
+ This is the real file name if the file has been opened.
+ Otherwise it is the original name supplied by the user. */
+
+const char *objfile_name (const struct objfile *objfile);
+
+/* Return the (real) file name of OBJFILE if the file has been opened,
+ otherwise return NULL. */
+
+const char *objfile_filename (const struct objfile *objfile);
+
+/* Return the name to print for OBJFILE in debugging messages. */
+
+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