/* Interface between GDB and target environments, including files and processes
- Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- 2000, 2001, 2002 Free Software Foundation, Inc.
+
+ Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
+ 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+
Contributed by Cygnus Support. Written by John Gilmore.
This file is part of GDB.
struct objfile;
struct ui_file;
struct mem_attrib;
+struct target_ops;
/* This include file defines the interface between the main part
of the debugger, and the part which is target-specific, or
specific to the communications interface between us and the
target.
- A TARGET is an interface between the debugger and a particular
- kind of file or process. Targets can be STACKED in STRATA,
+ A TARGET is an interface between the debugger and a particular
+ kind of file or process. Targets can be STACKED in STRATA,
so that more than one target can potentially respond to a request.
In particular, memory accesses will walk down the stack of targets
until they find a target that is interested in handling that particular
INF_QUIT_REQ,
/* Process a normal inferior event which will result in target_wait
being called. */
- INF_REG_EVENT,
+ INF_REG_EVENT,
/* Deal with an error on the inferior. */
INF_ERROR,
/* We are called because a timer went off. */
/* Given a name (SIGHUP, etc.), return its signal. */
enum target_signal target_signal_from_name (char *);
\f
+/* Request the transfer of up to LEN 8-bit bytes of the target's
+ OBJECT. The OFFSET, for a seekable object, specifies the starting
+ point. The ANNEX can be used to provide additional data-specific
+ information to the target.
+
+ Return the number of bytes actually transfered, zero when no
+ further transfer is possible, and -1 when the transfer is not
+ supported.
+
+ NOTE: cagney/2003-10-17: The current interface does not support a
+ "retry" mechanism. Instead it assumes that at least one byte will
+ be transfered on each call.
+
+ NOTE: cagney/2003-10-17: The current interface can lead to
+ fragmented transfers. Lower target levels should not implement
+ hacks, such as enlarging the transfer, in an attempt to compensate
+ for this. Instead, the target stack should be extended so that it
+ implements supply/collect methods and a look-aside object cache.
+ With that available, the lowest target can safely and freely "push"
+ data up the stack.
+
+ NOTE: cagney/2003-10-17: Unlike the old query and the memory
+ transfer mechanisms, these methods are explicitly parameterized by
+ the target that it should be applied to.
+
+ NOTE: cagney/2003-10-17: Just like the old query and memory xfer
+ methods, these new methods perform partial transfers. The only
+ difference is that these new methods thought to include "partial"
+ in the name. The old code's failure to do this lead to much
+ confusion and duplication of effort as each target object attempted
+ to locally take responsibility for something it didn't have to
+ worry about.
+
+ NOTE: cagney/2003-10-17: With a TARGET_OBJECT_KOD object, for
+ backward compatibility with the "target_query" method that this
+ replaced, when OFFSET and LEN are both zero, return the "minimum"
+ buffer size. See "remote.c" for further information. */
+
+enum target_object
+{
+ /* Kernel Object Display transfer. See "kod.c" and "remote.c". */
+ TARGET_OBJECT_KOD,
+ /* AVR target specific transfer. See "avr-tdep.c" and "remote.c". */
+ TARGET_OBJECT_AVR,
+ /* Transfer up-to LEN bytes of memory starting at OFFSET. */
+ TARGET_OBJECT_MEMORY,
+ /* Kernel Unwind Table. See "ia64-tdep.c". */
+ TARGET_OBJECT_UNWIND_TABLE,
+ /* Transfer auxilliary vector. */
+ TARGET_OBJECT_AUXV,
+ /* StackGhost cookie. See "sparc-tdep.c". */
+ TARGET_OBJECT_WCOOKIE
+
+ /* Possible future objects: TARGET_OBJECT_FILE, TARGET_OBJECT_PROC, ... */
+};
+
+extern LONGEST target_read_partial (struct target_ops *ops,
+ enum target_object object,
+ const char *annex, void *buf,
+ ULONGEST offset, LONGEST len);
+
+extern LONGEST target_write_partial (struct target_ops *ops,
+ enum target_object object,
+ const char *annex, const void *buf,
+ ULONGEST offset, LONGEST len);
+
+/* Wrappers to perform the full transfer. */
+extern LONGEST target_read (struct target_ops *ops,
+ enum target_object object,
+ const char *annex, void *buf,
+ ULONGEST offset, LONGEST len);
+
+extern LONGEST target_write (struct target_ops *ops,
+ enum target_object object,
+ const char *annex, const void *buf,
+ ULONGEST offset, LONGEST len);
+
+/* Wrappers to target read/write that perform memory transfers. They
+ throw an error if the memory transfer fails.
+
+ NOTE: cagney/2003-10-23: The naming schema is lifted from
+ "frame.h". The parameter order is lifted from get_frame_memory,
+ which in turn lifted it from read_memory. */
+
+extern void get_target_memory (struct target_ops *ops, CORE_ADDR addr,
+ void *buf, LONGEST len);
+extern ULONGEST get_target_memory_unsigned (struct target_ops *ops,
+ CORE_ADDR addr, int len);
+\f
/* If certain kinds of activity happen, target_wait should perform
callbacks. */
struct target_ops
{
+ struct target_ops *beneath; /* To the target under this one. */
char *to_shortname; /* Name this target type */
char *to_longname; /* Name for printing */
char *to_doc; /* Documentation. Does not include trailing
newline, and starts with a one-line descrip-
tion (probably similar to to_longname). */
+ /* Per-target scratch pad. */
+ void *to_data;
+ /* The open routine takes the rest of the parameters from the
+ command, and (if successful) pushes a new target onto the
+ stack. Targets should supply this routine, if only to provide
+ an error message. */
void (*to_open) (char *, int);
+ /* Old targets with a static target vector provide "to_close".
+ New re-entrant targets provide "to_xclose" and that is expected
+ to xfree everything (including the "struct target_ops"). */
+ void (*to_xclose) (struct target_ops *targ, int quitting);
void (*to_close) (int);
void (*to_attach) (char *, int);
void (*to_post_attach) (int);
void (*to_detach) (char *, int);
+ void (*to_disconnect) (char *, int);
void (*to_resume) (ptid_t, int, enum target_signal);
ptid_t (*to_wait) (ptid_t, struct target_waitstatus *);
void (*to_post_wait) (ptid_t, int);
something at MEMADDR + N. */
int (*to_xfer_memory) (CORE_ADDR memaddr, char *myaddr,
- int len, int write,
+ int len, int write,
struct mem_attrib *attrib,
struct target_ops *target);
-#if 0
- /* Enable this after 4.12. */
-
- /* Search target memory. Start at STARTADDR and take LEN bytes of
- target memory, and them with MASK, and compare to DATA. If they
- match, set *ADDR_FOUND to the address we found it at, store the data
- we found at LEN bytes starting at DATA_FOUND, and return. If
- not, add INCREMENT to the search address and keep trying until
- the search address is outside of the range [LORANGE,HIRANGE).
-
- If we don't find anything, set *ADDR_FOUND to (CORE_ADDR)0 and
- return. */
-
- void (*to_search) (int len, char *data, char *mask,
- CORE_ADDR startaddr, int increment,
- CORE_ADDR lorange, CORE_ADDR hirange,
- CORE_ADDR * addr_found, char *data_found);
-
-#define target_search(len, data, mask, startaddr, increment, lorange, hirange, addr_found, data_found) \
- (*current_target.to_search) (len, data, mask, startaddr, increment, \
- lorange, hirange, addr_found, data_found)
-#endif /* 0 */
-
void (*to_files_info) (struct target_ops *);
int (*to_insert_breakpoint) (CORE_ADDR, char *);
int (*to_remove_breakpoint) (CORE_ADDR, char *);
void (*to_kill) (void);
void (*to_load) (char *, int);
int (*to_lookup_symbol) (char *, CORE_ADDR *);
- void (*to_create_inferior) (char *, char *, char **);
+ void (*to_create_inferior) (char *, char *, char **, int);
void (*to_post_startup_inferior) (ptid_t);
void (*to_acknowledge_created_inferior) (int);
int (*to_insert_fork_catchpoint) (int);
char *(*to_pid_to_str) (ptid_t);
char *(*to_extra_thread_info) (struct thread_info *);
void (*to_stop) (void);
- int (*to_query) (int /*char */ , char *, char *, int *);
void (*to_rcmd) (char *command, struct ui_file *output);
struct symtab_and_line *(*to_enable_exception_callback) (enum
exception_event_kind,
void (*to_async) (void (*cb) (enum inferior_event_type, void *context),
void *context);
int to_async_mask_value;
- int (*to_find_memory_regions) (int (*) (CORE_ADDR,
- unsigned long,
- int, int, int,
- void *),
+ int (*to_find_memory_regions) (int (*) (CORE_ADDR,
+ unsigned long,
+ int, int, int,
+ void *),
void *);
char * (*to_make_corefile_notes) (bfd *, int *);
struct objfile *objfile,
CORE_ADDR offset);
+ /* Perform partial transfers on OBJECT. See target_read_partial
+ and target_write_partial for details of each variant. One, and
+ only one, of readbuf or writebuf must be non-NULL. */
+ LONGEST (*to_xfer_partial) (struct target_ops *ops,
+ enum target_object object, const char *annex,
+ void *readbuf, const void *writebuf,
+ ULONGEST offset, LONGEST len);
+
int to_magic;
/* Need sub-structure for target machine related rather than comm related?
*/
extern struct target_ops current_target;
-/* An item on the target stack. */
-
-struct target_stack_item
- {
- struct target_stack_item *next;
- struct target_ops *target_ops;
- };
-
-/* The target stack. */
-
-extern struct target_stack_item *target_stack;
-
/* Define easy words for doing these operations on our current target. */
#define target_shortname (current_target.to_shortname)
#define target_longname (current_target.to_longname)
-/* The open routine takes the rest of the parameters from the command,
- and (if successful) pushes a new target onto the stack.
- Targets should supply this routine, if only to provide an error message. */
+/* Does whatever cleanup is required for a target that we are no
+ longer going to be calling. QUITTING indicates that GDB is exiting
+ and should not get hung on an error (otherwise it is important to
+ perform clean termination, even if it takes a while). This routine
+ is automatically always called when popping the target off the
+ target stack (to_beneath is undefined). Closing file descriptors
+ and freeing all memory allocated memory are typical things it
+ should do. */
-#define target_open(name, from_tty) \
- do { \
- dcache_invalidate (target_dcache); \
- (*current_target.to_open) (name, from_tty); \
- } while (0)
-
-/* Does whatever cleanup is required for a target that we are no longer
- going to be calling. Argument says whether we are quitting gdb and
- should not get hung in case of errors, or whether we want a clean
- termination even if it takes a while. This routine is automatically
- always called just before a routine is popped off the target stack.
- Closing file descriptors and freeing memory are typical things it should
- do. */
-
-#define target_close(quitting) \
- (*current_target.to_close) (quitting)
+void target_close (struct target_ops *targ, int quitting);
/* Attaches to a process on the target side. Arguments are as passed
to the `attach' command by the user. This routine can be called
when the target is not on the target-stack, if the target_can_run
- routine returns 1; in that case, it must push itself onto the stack.
+ routine returns 1; in that case, it must push itself onto the stack.
Upon exit, the target should be ready for normal operations, and
- should be ready to deliver the status of the process immediately
+ should be ready to deliver the status of the process immediately
(without waiting) to an upcoming target_wait call. */
#define target_attach(args, from_tty) \
extern void target_detach (char *, int);
+/* Disconnect from the current target without resuming it (leaving it
+ waiting for a debugger). */
+
+extern void target_disconnect (char *, int);
+
/* Resume execution of the target process PTID. STEP says whether to
single-step or to run free; SIGGNAL is the signal to be given to
the target, or TARGET_SIGNAL_0 for no signal. The caller may not
extern int target_write_memory (CORE_ADDR memaddr, char *myaddr, int len);
-extern int xfer_memory (CORE_ADDR, char *, int, int,
+extern int xfer_memory (CORE_ADDR, char *, int, int,
struct mem_attrib *, struct target_ops *);
-extern int child_xfer_memory (CORE_ADDR, char *, int, int,
+extern int child_xfer_memory (CORE_ADDR, char *, int, int,
struct mem_attrib *, struct target_ops *);
/* Make a single attempt at transfering LEN bytes. On a successful
#define target_files_info() \
(*current_target.to_files_info) (¤t_target)
-/* Insert a breakpoint at address ADDR in the target machine.
- SAVE is a pointer to memory allocated for saving the
- target contents. It is guaranteed by the caller to be long enough
- to save "sizeof BREAKPOINT" bytes. Result is 0 for success, or
- an errno value. */
+/* Insert a breakpoint at address ADDR in the target machine. SAVE is
+ a pointer to memory allocated for saving the target contents. It
+ is guaranteed by the caller to be long enough to save the number of
+ breakpoint bytes indicated by BREAKPOINT_FROM_PC. Result is 0 for
+ success, or an errno value. */
#define target_insert_breakpoint(addr, save) \
(*current_target.to_insert_breakpoint) (addr, save)
/* Remove a breakpoint at address ADDR in the target machine.
- SAVE is a pointer to the same save area
- that was previously passed to target_insert_breakpoint.
+ SAVE is a pointer to the same save area
+ that was previously passed to target_insert_breakpoint.
Result is 0 for success, or an errno value. */
#define target_remove_breakpoint(addr, save) \
ENV is the environment vector to pass. Errors reported with error().
On VxWorks and various standalone systems, we ignore exec_file. */
-#define target_create_inferior(exec_file, args, env) \
- (*current_target.to_create_inferior) (exec_file, args, env)
+#define target_create_inferior(exec_file, args, env, FROM_TTY) \
+ (*current_target.to_create_inferior) (exec_file, args, env, (FROM_TTY))
/* Some targets (such as ttrace-based HPUX) don't allow us to request
(*current_target.to_has_exited) (pid,wait_status,exit_status)
/* The debugger has completed a blocking wait() call. There is now
- some process event that must be processed. This function should
+ some process event that must be processed. This function should
be defined by those targets that require the debugger to perform
cleanup or internal state changes in response to the process event. */
#define target_stop current_target.to_stop
-/* Queries the target side for some information. The first argument is a
- letter specifying the type of the query, which is used to determine who
- should process it. The second argument is a string that specifies which
- information is desired and the third is a buffer that carries back the
- response from the target side. The fourth parameter is the size of the
- output buffer supplied. */
-
-#define target_query(query_type, query, resp_buffer, bufffer_size) \
- (*current_target.to_query) (query_type, query, resp_buffer, bufffer_size)
-
/* Send the specified COMMAND to the target's monitor
(shell,interpreter) for execution. The result of the query is
placed in OUTBUF. */
/* Get the symbol information for a breakpointable routine called when
- an exception event occurs.
+ an exception event occurs.
Intended mainly for C++, and for those
platforms/implementations where such a callback mechanism is available,
e.g. HP-UX with ANSI C++ (aCC). Some compilers (e.g. g++) support
#define target_async_mask_value \
(current_target.to_async_mask_value)
-extern int target_async_mask (int mask);
+extern int target_async_mask (int mask);
extern void target_link (char *, CORE_ADDR *);
* New Objfile Event Hook:
*
* Sometimes a GDB component wants to get notified whenever a new
- * objfile is loaded. Mainly this is used by thread-debugging
+ * objfile is loaded. Mainly this is used by thread-debugging
* implementations that need to know when symbols for the target
* thread implemenation are available.
*
* The old way of doing this is to define a macro 'target_new_objfile'
* that points to the function that you want to be called on every
* objfile/shlib load.
- *
- * The new way is to grab the function pointer, 'target_new_objfile_hook',
- * and point it to the function that you want to be called on every
- * objfile/shlib load.
- *
- * If multiple clients are willing to be cooperative, they can each
- * save a pointer to the previous value of target_new_objfile_hook
- * before modifying it, and arrange for their function to call the
- * previous function in the chain. In that way, multiple clients
- * can receive this notification (something like with signal handlers).
- */
-extern void (*target_new_objfile_hook) (struct objfile *);
+ The new way is to grab the function pointer,
+ 'deprecated_target_new_objfile_hook', and point it to the function
+ that you want to be called on every objfile/shlib load.
+
+ If multiple clients are willing to be cooperative, they can each
+ save a pointer to the previous value of
+ deprecated_target_new_objfile_hook before modifying it, and arrange
+ for their function to call the previous function in the chain. In
+ that way, multiple clients can receive this notification (something
+ like with signal handlers). */
+
+extern void (*deprecated_target_new_objfile_hook) (struct objfile *);
#ifndef target_pid_or_tid_to_str
#define target_pid_or_tid_to_str(ID) \
* Iterator function for target memory regions.
* Calls a callback function once for each memory region 'mapped'
* in the child process. Defined as a simple macro rather than
- * as a function macro so that it can be tested for nullity.
+ * as a function macro so that it can be tested for nullity.
*/
#define target_find_memory_regions(FUNC, DATA) \
#define target_get_thread_local_address_p() \
(target_get_thread_local_address != NULL)
-/* Hook to call target-dependent code after reading in a new symbol table. */
-
-#ifndef TARGET_SYMFILE_POSTREAD
-#define TARGET_SYMFILE_POSTREAD(OBJFILE)
-#endif
-
/* Hook to call target dependent code just after inferior target process has
started. */
/* Provide defaults for hardware watchpoint functions. */
-/* If the *_hw_beakpoint functions have not been defined
+/* If the *_hw_beakpoint functions have not been defined
elsewhere use the definitions in the target vector. */
/* Returns non-zero if we can set a hardware watchpoint of type TYPE. TYPE is
(*current_target.to_stopped_data_address) ()
#endif
-/* If defined, then we need to decr pc by this much after a hardware break-
- point. Presumably this overrides DECR_PC_AFTER_BREAK... */
-
-#ifndef DECR_PC_AFTER_HW_BREAK
-#define DECR_PC_AFTER_HW_BREAK 0
-#endif
-
-/* Sometimes gdb may pick up what appears to be a valid target address
- from a minimal symbol, but the value really means, essentially,
- "This is an index into a table which is populated when the inferior
- is run. Therefore, do not attempt to use this as a PC." */
-
-#if !defined(PC_REQUIRES_RUN_BEFORE_USE)
-#define PC_REQUIRES_RUN_BEFORE_USE(pc) (0)
-#endif
-
/* This will only be defined by a target that supports catching vfork events,
such as HP-UX.
CORE_ADDR addr; /* Lowest address in section */
CORE_ADDR endaddr; /* 1+highest address in section */
- sec_ptr the_bfd_section;
+ struct bfd_section *the_bfd_section;
bfd *bfd; /* BFD file pointer */
};
-/* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR.
- Returns 0 if OK, 1 on error. */
+/* Return the "section" containing the specified address. */
+struct section_table *target_section_by_addr (struct target_ops *target,
+ CORE_ADDR addr);
-extern int build_section_table (bfd *, struct section_table **,
- struct section_table **);
/* From mem-break.c */
extern int default_memory_insert_breakpoint (CORE_ADDR, char *);
-extern const unsigned char *memory_breakpoint_from_pc (CORE_ADDR *pcptr,
- int *lenptr);
-
/* From target.c */
extern void find_default_attach (char *, int);
-extern void find_default_create_inferior (char *, char *, char **);
+extern void find_default_create_inferior (char *, char *, char **, int);
extern struct target_ops *find_run_target (void);
projects / deliverable / binutils-gdb.git / blobdiff