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binutils-gdb/gdb/target.h
Michael Snyder 6b04bdb74a 2009-10-25 Michael Snyder <msnyder@vmware.com> 
* target.h (struct target_ops): New methods to_get_bookmark
        and to_goto_bookmark.
        (target_get_bookmark): New macro.
        (target_goto_bookmark): New macro.
        * target.c (dummy_get_bookmark): New function, default implementation.
        (dummy_goto_bookmark): New function, default implementation.
        (update_current_target): Inherit new methods.
        * record.c (record_get_bookmark): New function.
        (record_goto_bookmark): New function.
        (init_record_ops): Set to_get_bookmark and to_goto_bookmark methods.
        * reverse.c (struct bookmark): New type.
        (save_bookmark_command): New function (command).
        (delete_bookmark_command): New function (command).
        (goto_bookmark_command): New function (command).
        (bookmarks_info): New function (command).
        (_initialize_reverse): Add new bookmark commands.
	* command.h (enum command_class): Add class_bookmark.
	* NEWS: Mention bookmark commands.
2009-11-20 17:23:38 +00:00

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/* Interface between GDB and target environments, including files and processes
Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
Free Software Foundation, Inc.
Contributed by Cygnus Support. Written by John Gilmore.
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 3 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.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#if !defined (TARGET_H)
#define TARGET_H
struct objfile;
struct ui_file;
struct mem_attrib;
struct target_ops;
struct bp_target_info;
struct regcache;
struct target_section_table;
/* 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,
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
address. STRATA are artificial boundaries on the stack, within
which particular kinds of targets live. Strata exist so that
people don't get confused by pushing e.g. a process target and then
a file target, and wondering why they can't see the current values
of variables any more (the file target is handling them and they
never get to the process target). So when you push a file target,
it goes into the file stratum, which is always below the process
stratum. */
#include "bfd.h"
#include "symtab.h"
#include "memattr.h"
#include "vec.h"
#include "gdb_signals.h"
enum strata
{
dummy_stratum, /* The lowest of the low */
file_stratum, /* Executable files, etc */
core_stratum, /* Core dump files */
process_stratum, /* Executing processes */
thread_stratum, /* Executing threads */
record_stratum, /* Support record debugging */
arch_stratum /* Architecture overrides */
};
enum thread_control_capabilities
{
tc_none = 0, /* Default: can't control thread execution. */
tc_schedlock = 1, /* Can lock the thread scheduler. */
};
/* Stuff for target_wait. */
/* Generally, what has the program done? */
enum target_waitkind
{
/* The program has exited. The exit status is in value.integer. */
TARGET_WAITKIND_EXITED,
/* The program has stopped with a signal. Which signal is in
value.sig. */
TARGET_WAITKIND_STOPPED,
/* The program has terminated with a signal. Which signal is in
value.sig. */
TARGET_WAITKIND_SIGNALLED,
/* The program is letting us know that it dynamically loaded something
(e.g. it called load(2) on AIX). */
TARGET_WAITKIND_LOADED,
/* The program has forked. A "related" process' PTID is in
value.related_pid. I.e., if the child forks, value.related_pid
is the parent's ID. */
TARGET_WAITKIND_FORKED,
/* The program has vforked. A "related" process's PTID is in
value.related_pid. */
TARGET_WAITKIND_VFORKED,
/* The program has exec'ed a new executable file. The new file's
pathname is pointed to by value.execd_pathname. */
TARGET_WAITKIND_EXECD,
/* The program had previously vforked, and now the child is done
with the shared memory region, because it exec'ed or exited.
Note that the event is reported to the vfork parent. This is
only used if GDB did not stay attached to the vfork child,
otherwise, a TARGET_WAITKIND_EXECD or
TARGET_WAITKIND_EXIT|SIGNALLED event associated with the child
has the same effect. */
TARGET_WAITKIND_VFORK_DONE,
/* The program has entered or returned from a system call. On
HP-UX, this is used in the hardware watchpoint implementation.
The syscall's unique integer ID number is in value.syscall_id */
TARGET_WAITKIND_SYSCALL_ENTRY,
TARGET_WAITKIND_SYSCALL_RETURN,
/* Nothing happened, but we stopped anyway. This perhaps should be handled
within target_wait, but I'm not sure target_wait should be resuming the
inferior. */
TARGET_WAITKIND_SPURIOUS,
/* An event has occured, but we should wait again.
Remote_async_wait() returns this when there is an event
on the inferior, but the rest of the world is not interested in
it. The inferior has not stopped, but has just sent some output
to the console, for instance. In this case, we want to go back
to the event loop and wait there for another event from the
inferior, rather than being stuck in the remote_async_wait()
function. This way the event loop is responsive to other events,
like for instance the user typing. */
TARGET_WAITKIND_IGNORE,
/* The target has run out of history information,
and cannot run backward any further. */
TARGET_WAITKIND_NO_HISTORY
};
struct target_waitstatus
{
enum target_waitkind kind;
/* Forked child pid, execd pathname, exit status, signal number or
syscall number. */
union
{
int integer;
enum target_signal sig;
ptid_t related_pid;
char *execd_pathname;
int syscall_number;
}
value;
};
/* Options that can be passed to target_wait. */
/* Return immediately if there's no event already queued. If this
options is not requested, target_wait blocks waiting for an
event. */
#define TARGET_WNOHANG 1
/* The structure below stores information about a system call.
It is basically used in the "catch syscall" command, and in
every function that gives information about a system call.
It's also good to mention that its fields represent everything
that we currently know about a syscall in GDB. */
struct syscall
{
/* The syscall number. */
int number;
/* The syscall name. */
const char *name;
};
/* Return a pretty printed form of target_waitstatus.
Space for the result is malloc'd, caller must free. */
extern char *target_waitstatus_to_string (const struct target_waitstatus *);
/* Possible types of events that the inferior handler will have to
deal with. */
enum inferior_event_type
{
/* There is a request to quit the inferior, abandon it. */
INF_QUIT_REQ,
/* Process a normal inferior event which will result in target_wait
being called. */
INF_REG_EVENT,
/* Deal with an error on the inferior. */
INF_ERROR,
/* We are called because a timer went off. */
INF_TIMER,
/* We are called to do stuff after the inferior stops. */
INF_EXEC_COMPLETE,
/* We are called to do some stuff after the inferior stops, but we
are expected to reenter the proceed() and
handle_inferior_event() functions. This is used only in case of
'step n' like commands. */
INF_EXEC_CONTINUE
};
/* Target objects which can be transfered using target_read,
target_write, et cetera. */
enum target_object
{
/* AVR target specific transfer. See "avr-tdep.c" and "remote.c". */
TARGET_OBJECT_AVR,
/* SPU target specific transfer. See "spu-tdep.c". */
TARGET_OBJECT_SPU,
/* Transfer up-to LEN bytes of memory starting at OFFSET. */
TARGET_OBJECT_MEMORY,
/* Memory, avoiding GDB's data cache and trusting the executable.
Target implementations of to_xfer_partial never need to handle
this object, and most callers should not use it. */
TARGET_OBJECT_RAW_MEMORY,
/* Memory known to be part of the target's stack. This is cached even
if it is not in a region marked as such, since it is known to be
"normal" RAM. */
TARGET_OBJECT_STACK_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,
/* Target memory map in XML format. */
TARGET_OBJECT_MEMORY_MAP,
/* Flash memory. This object can be used to write contents to
a previously erased flash memory. Using it without erasing
flash can have unexpected results. Addresses are physical
address on target, and not relative to flash start. */
TARGET_OBJECT_FLASH,
/* Available target-specific features, e.g. registers and coprocessors.
See "target-descriptions.c". ANNEX should never be empty. */
TARGET_OBJECT_AVAILABLE_FEATURES,
/* Currently loaded libraries, in XML format. */
TARGET_OBJECT_LIBRARIES,
/* Get OS specific data. The ANNEX specifies the type (running
processes, etc.). */
TARGET_OBJECT_OSDATA,
/* Extra signal info. Usually the contents of `siginfo_t' on unix
platforms. */
TARGET_OBJECT_SIGNAL_INFO,
/* Possible future objects: TARGET_OBJECT_FILE, ... */
};
/* Request that OPS transfer 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, or -1 if the
transfer is not supported or otherwise fails. Return of a positive
value less than LEN indicates that no further transfer is possible.
Unlike the raw to_xfer_partial interface, callers of these
functions do not need to retry partial transfers. */
extern LONGEST target_read (struct target_ops *ops,
enum target_object object,
const char *annex, gdb_byte *buf,
ULONGEST offset, LONGEST len);
extern LONGEST target_read_until_error (struct target_ops *ops,
enum target_object object,
const char *annex, gdb_byte *buf,
ULONGEST offset, LONGEST len);
extern LONGEST target_write (struct target_ops *ops,
enum target_object object,
const char *annex, const gdb_byte *buf,
ULONGEST offset, LONGEST len);
/* Similar to target_write, except that it also calls PROGRESS with
the number of bytes written and the opaque BATON after every
successful partial write (and before the first write). This is
useful for progress reporting and user interaction while writing
data. To abort the transfer, the progress callback can throw an
exception. */
LONGEST target_write_with_progress (struct target_ops *ops,
enum target_object object,
const char *annex, const gdb_byte *buf,
ULONGEST offset, LONGEST len,
void (*progress) (ULONGEST, void *),
void *baton);
/* Wrapper to perform a full read of unknown size. OBJECT/ANNEX will
be read using OPS. The return value will be -1 if the transfer
fails or is not supported; 0 if the object is empty; or the length
of the object otherwise. If a positive value is returned, a
sufficiently large buffer will be allocated using xmalloc and
returned in *BUF_P containing the contents of the object.
This method should be used for objects sufficiently small to store
in a single xmalloc'd buffer, when no fixed bound on the object's
size is known in advance. Don't try to read TARGET_OBJECT_MEMORY
through this function. */
extern LONGEST target_read_alloc (struct target_ops *ops,
enum target_object object,
const char *annex, gdb_byte **buf_p);
/* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and
returned as a string, allocated using xmalloc. If an error occurs
or the transfer is unsupported, NULL is returned. Empty objects
are returned as allocated but empty strings. A warning is issued
if the result contains any embedded NUL bytes. */
extern char *target_read_stralloc (struct target_ops *ops,
enum target_object object,
const char *annex);
/* 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,
gdb_byte *buf, LONGEST len);
extern ULONGEST get_target_memory_unsigned (struct target_ops *ops,
CORE_ADDR addr, int len,
enum bfd_endian byte_order);
struct thread_info; /* fwd decl for parameter list below: */
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) (struct target_ops *ops, char *, int);
void (*to_post_attach) (int);
void (*to_detach) (struct target_ops *ops, char *, int);
void (*to_disconnect) (struct target_ops *, char *, int);
void (*to_resume) (struct target_ops *, ptid_t, int, enum target_signal);
ptid_t (*to_wait) (struct target_ops *,
ptid_t, struct target_waitstatus *, int);
void (*to_fetch_registers) (struct target_ops *, struct regcache *, int);
void (*to_store_registers) (struct target_ops *, struct regcache *, int);
void (*to_prepare_to_store) (struct regcache *);
/* Transfer LEN bytes of memory between GDB address MYADDR and
target address MEMADDR. If WRITE, transfer them to the target, else
transfer them from the target. TARGET is the target from which we
get this function.
Return value, N, is one of the following:
0 means that we can't handle this. If errno has been set, it is the
error which prevented us from doing it (FIXME: What about bfd_error?).
positive (call it N) means that we have transferred N bytes
starting at MEMADDR. We might be able to handle more bytes
beyond this length, but no promises.
negative (call its absolute value N) means that we cannot
transfer right at MEMADDR, but we could transfer at least
something at MEMADDR + N.
NOTE: cagney/2004-10-01: This has been entirely superseeded by
to_xfer_partial and inferior inheritance. */
int (*deprecated_xfer_memory) (CORE_ADDR memaddr, gdb_byte *myaddr,
int len, int write,
struct mem_attrib *attrib,
struct target_ops *target);
void (*to_files_info) (struct target_ops *);
int (*to_insert_breakpoint) (struct gdbarch *, struct bp_target_info *);
int (*to_remove_breakpoint) (struct gdbarch *, struct bp_target_info *);
int (*to_can_use_hw_breakpoint) (int, int, int);
int (*to_insert_hw_breakpoint) (struct gdbarch *, struct bp_target_info *);
int (*to_remove_hw_breakpoint) (struct gdbarch *, struct bp_target_info *);
int (*to_remove_watchpoint) (CORE_ADDR, int, int);
int (*to_insert_watchpoint) (CORE_ADDR, int, int);
int (*to_stopped_by_watchpoint) (void);
int to_have_steppable_watchpoint;
int to_have_continuable_watchpoint;
int (*to_stopped_data_address) (struct target_ops *, CORE_ADDR *);
int (*to_watchpoint_addr_within_range) (struct target_ops *,
CORE_ADDR, CORE_ADDR, int);
int (*to_region_ok_for_hw_watchpoint) (CORE_ADDR, int);
void (*to_terminal_init) (void);
void (*to_terminal_inferior) (void);
void (*to_terminal_ours_for_output) (void);
void (*to_terminal_ours) (void);
void (*to_terminal_save_ours) (void);
void (*to_terminal_info) (char *, int);
void (*to_kill) (struct target_ops *);
void (*to_load) (char *, int);
int (*to_lookup_symbol) (char *, CORE_ADDR *);
void (*to_create_inferior) (struct target_ops *,
char *, char *, char **, int);
void (*to_post_startup_inferior) (ptid_t);
void (*to_acknowledge_created_inferior) (int);
void (*to_insert_fork_catchpoint) (int);
int (*to_remove_fork_catchpoint) (int);
void (*to_insert_vfork_catchpoint) (int);
int (*to_remove_vfork_catchpoint) (int);
int (*to_follow_fork) (struct target_ops *, int);
void (*to_insert_exec_catchpoint) (int);
int (*to_remove_exec_catchpoint) (int);
int (*to_set_syscall_catchpoint) (int, int, int, int, int *);
int (*to_has_exited) (int, int, int *);
void (*to_mourn_inferior) (struct target_ops *);
int (*to_can_run) (void);
void (*to_notice_signals) (ptid_t ptid);
int (*to_thread_alive) (struct target_ops *, ptid_t ptid);
void (*to_find_new_threads) (struct target_ops *);
char *(*to_pid_to_str) (struct target_ops *, ptid_t);
char *(*to_extra_thread_info) (struct thread_info *);
void (*to_stop) (ptid_t);
void (*to_rcmd) (char *command, struct ui_file *output);
char *(*to_pid_to_exec_file) (int pid);
void (*to_log_command) (const char *);
struct target_section_table *(*to_get_section_table) (struct target_ops *);
enum strata to_stratum;
int (*to_has_all_memory) (struct target_ops *);
int (*to_has_memory) (struct target_ops *);
int (*to_has_stack) (struct target_ops *);
int (*to_has_registers) (struct target_ops *);
int (*to_has_execution) (struct target_ops *);
int to_has_thread_control; /* control thread execution */
int to_attach_no_wait;
/* ASYNC target controls */
int (*to_can_async_p) (void);
int (*to_is_async_p) (void);
void (*to_async) (void (*) (enum inferior_event_type, void *), void *);
int (*to_async_mask) (int);
int (*to_supports_non_stop) (void);
/* find_memory_regions support method for gcore */
int (*to_find_memory_regions) (int (*) (CORE_ADDR,
unsigned long,
int, int, int,
void *),
void *);
/* make_corefile_notes support method for gcore */
char * (*to_make_corefile_notes) (bfd *, int *);
/* get_bookmark support method for bookmarks */
gdb_byte * (*to_get_bookmark) (char *, int);
/* goto_bookmark support method for bookmarks */
void (*to_goto_bookmark) (gdb_byte *, int);
/* Return the thread-local address at OFFSET in the
thread-local storage for the thread PTID and the shared library
or executable file given by OBJFILE. If that block of
thread-local storage hasn't been allocated yet, this function
may return an error. */
CORE_ADDR (*to_get_thread_local_address) (struct target_ops *ops,
ptid_t ptid,
CORE_ADDR load_module_addr,
CORE_ADDR offset);
/* Request that OPS transfer 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. Return of a positive value smaller than LEN does
not indicate the end of the object, only the end of the
transfer; higher level code should continue transferring if
desired. This is handled in target.c.
The interface does not support a "retry" mechanism. Instead it
assumes that at least one byte will be transfered on each
successful 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.
See target_read and target_write for more information. 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,
gdb_byte *readbuf, const gdb_byte *writebuf,
ULONGEST offset, LONGEST len);
/* Returns the memory map for the target. A return value of NULL
means that no memory map is available. If a memory address
does not fall within any returned regions, it's assumed to be
RAM. The returned memory regions should not overlap.
The order of regions does not matter; target_memory_map will
sort regions by starting address. For that reason, this
function should not be called directly except via
target_memory_map.
This method should not cache data; if the memory map could
change unexpectedly, it should be invalidated, and higher
layers will re-fetch it. */
VEC(mem_region_s) *(*to_memory_map) (struct target_ops *);
/* Erases the region of flash memory starting at ADDRESS, of
length LENGTH.
Precondition: both ADDRESS and ADDRESS+LENGTH should be aligned
on flash block boundaries, as reported by 'to_memory_map'. */
void (*to_flash_erase) (struct target_ops *,
ULONGEST address, LONGEST length);
/* Finishes a flash memory write sequence. After this operation
all flash memory should be available for writing and the result
of reading from areas written by 'to_flash_write' should be
equal to what was written. */
void (*to_flash_done) (struct target_ops *);
/* Describe the architecture-specific features of this target.
Returns the description found, or NULL if no description
was available. */
const struct target_desc *(*to_read_description) (struct target_ops *ops);
/* Build the PTID of the thread on which a given task is running,
based on LWP and THREAD. These values are extracted from the
task Private_Data section of the Ada Task Control Block, and
their interpretation depends on the target. */
ptid_t (*to_get_ada_task_ptid) (long lwp, long thread);
/* Read one auxv entry from *READPTR, not reading locations >= ENDPTR.
Return 0 if *READPTR is already at the end of the buffer.
Return -1 if there is insufficient buffer for a whole entry.
Return 1 if an entry was read into *TYPEP and *VALP. */
int (*to_auxv_parse) (struct target_ops *ops, gdb_byte **readptr,
gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp);
/* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
sequence of bytes in PATTERN with length PATTERN_LEN.
The result is 1 if found, 0 if not found, and -1 if there was an error
requiring halting of the search (e.g. memory read error).
If the pattern is found the address is recorded in FOUND_ADDRP. */
int (*to_search_memory) (struct target_ops *ops,
CORE_ADDR start_addr, ULONGEST search_space_len,
const gdb_byte *pattern, ULONGEST pattern_len,
CORE_ADDR *found_addrp);
/* Can target execute in reverse? */
int (*to_can_execute_reverse) (void);
/* Does this target support debugging multiple processes
simultaneously? */
int (*to_supports_multi_process) (void);
/* Determine current architecture of thread PTID.
The target is supposed to determine the architecture of the code where
the target is currently stopped at (on Cell, if a target is in spu_run,
to_thread_architecture would return SPU, otherwise PPC32 or PPC64).
This is architecture used to perform decr_pc_after_break adjustment,
and also determines the frame architecture of the innermost frame.
ptrace operations need to operate according to target_gdbarch.
The default implementation always returns target_gdbarch. */
struct gdbarch *(*to_thread_architecture) (struct target_ops *, ptid_t);
/* Determine current address space of thread PTID.
The default implementation always returns the inferior's
address space. */
struct address_space *(*to_thread_address_space) (struct target_ops *,
ptid_t);
int to_magic;
/* Need sub-structure for target machine related rather than comm related?
*/
};
/* Magic number for checking ops size. If a struct doesn't end with this
number, somebody changed the declaration but didn't change all the
places that initialize one. */
#define OPS_MAGIC 3840
/* The ops structure for our "current" target process. This should
never be NULL. If there is no target, it points to the dummy_target. */
extern struct target_ops current_target;
/* 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)
/* 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. */
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.
Upon exit, the target should be ready for normal operations, and
should be ready to deliver the status of the process immediately
(without waiting) to an upcoming target_wait call. */
void target_attach (char *, int);
/* Some targets don't generate traps when attaching to the inferior,
or their target_attach implementation takes care of the waiting.
These targets must set to_attach_no_wait. */
#define target_attach_no_wait \
(current_target.to_attach_no_wait)
/* The target_attach operation places a process under debugger control,
and stops the process.
This operation provides a target-specific hook that allows the
necessary bookkeeping to be performed after an attach completes. */
#define target_post_attach(pid) \
(*current_target.to_post_attach) (pid)
/* Takes a program previously attached to and detaches it.
The program may resume execution (some targets do, some don't) and will
no longer stop on signals, etc. We better not have left any breakpoints
in the program or it'll die when it hits one. ARGS is arguments
typed by the user (e.g. a signal to send the process). FROM_TTY
says whether to be verbose or not. */
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
pass TARGET_SIGNAL_DEFAULT. */
extern void target_resume (ptid_t ptid, int step, enum target_signal signal);
/* Wait for process pid to do something. PTID = -1 to wait for any
pid to do something. Return pid of child, or -1 in case of error;
store status through argument pointer STATUS. Note that it is
_NOT_ OK to throw_exception() out of target_wait() without popping
the debugging target from the stack; GDB isn't prepared to get back
to the prompt with a debugging target but without the frame cache,
stop_pc, etc., set up. OPTIONS is a bitwise OR of TARGET_W*
options. */
extern ptid_t target_wait (ptid_t ptid, struct target_waitstatus *status,
int options);
/* Fetch at least register REGNO, or all regs if regno == -1. No result. */
extern void target_fetch_registers (struct regcache *regcache, int regno);
/* Store at least register REGNO, or all regs if REGNO == -1.
It can store as many registers as it wants to, so target_prepare_to_store
must have been previously called. Calls error() if there are problems. */
extern void target_store_registers (struct regcache *regcache, int regs);
/* Get ready to modify the registers array. On machines which store
individual registers, this doesn't need to do anything. On machines
which store all the registers in one fell swoop, this makes sure
that REGISTERS contains all the registers from the program being
debugged. */
#define target_prepare_to_store(regcache) \
(*current_target.to_prepare_to_store) (regcache)
/* Determine current address space of thread PTID. */
struct address_space *target_thread_address_space (ptid_t);
/* Returns true if this target can debug multiple processes
simultaneously. */
#define target_supports_multi_process() \
(*current_target.to_supports_multi_process) ()
/* Invalidate all target dcaches. */
extern void target_dcache_invalidate (void);
extern int target_read_string (CORE_ADDR, char **, int, int *);
extern int target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len);
extern int target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, int len);
extern int target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr,
int len);
/* Fetches the target's memory map. If one is found it is sorted
and returned, after some consistency checking. Otherwise, NULL
is returned. */
VEC(mem_region_s) *target_memory_map (void);
/* Erase the specified flash region. */
void target_flash_erase (ULONGEST address, LONGEST length);
/* Finish a sequence of flash operations. */
void target_flash_done (void);
/* Describes a request for a memory write operation. */
struct memory_write_request
{
/* Begining address that must be written. */
ULONGEST begin;
/* Past-the-end address. */
ULONGEST end;
/* The data to write. */
gdb_byte *data;
/* A callback baton for progress reporting for this request. */
void *baton;
};
typedef struct memory_write_request memory_write_request_s;
DEF_VEC_O(memory_write_request_s);
/* Enumeration specifying different flash preservation behaviour. */
enum flash_preserve_mode
{
flash_preserve,
flash_discard
};
/* Write several memory blocks at once. This version can be more
efficient than making several calls to target_write_memory, in
particular because it can optimize accesses to flash memory.
Moreover, this is currently the only memory access function in gdb
that supports writing to flash memory, and it should be used for
all cases where access to flash memory is desirable.
REQUESTS is the vector (see vec.h) of memory_write_request.
PRESERVE_FLASH_P indicates what to do with blocks which must be
erased, but not completely rewritten.
PROGRESS_CB is a function that will be periodically called to provide
feedback to user. It will be called with the baton corresponding
to the request currently being written. It may also be called
with a NULL baton, when preserved flash sectors are being rewritten.
The function returns 0 on success, and error otherwise. */
int target_write_memory_blocks (VEC(memory_write_request_s) *requests,
enum flash_preserve_mode preserve_flash_p,
void (*progress_cb) (ULONGEST, void *));
/* From infrun.c. */
extern int inferior_has_forked (ptid_t pid, ptid_t *child_pid);
extern int inferior_has_vforked (ptid_t pid, ptid_t *child_pid);
extern int inferior_has_execd (ptid_t pid, char **execd_pathname);
extern int inferior_has_called_syscall (ptid_t pid, int *syscall_number);
/* Print a line about the current target. */
#define target_files_info() \
(*current_target.to_files_info) (&current_target)
/* Insert a breakpoint at address BP_TGT->placed_address in the target
machine. Result is 0 for success, or an errno value. */
#define target_insert_breakpoint(gdbarch, bp_tgt) \
(*current_target.to_insert_breakpoint) (gdbarch, bp_tgt)
/* Remove a breakpoint at address BP_TGT->placed_address in the target
machine. Result is 0 for success, or an errno value. */
#define target_remove_breakpoint(gdbarch, bp_tgt) \
(*current_target.to_remove_breakpoint) (gdbarch, bp_tgt)
/* Initialize the terminal settings we record for the inferior,
before we actually run the inferior. */
#define target_terminal_init() \
(*current_target.to_terminal_init) ()
/* Put the inferior's terminal settings into effect.
This is preparation for starting or resuming the inferior. */
extern void target_terminal_inferior (void);
/* Put some of our terminal settings into effect,
enough to get proper results from our output,
but do not change into or out of RAW mode
so that no input is discarded.
After doing this, either terminal_ours or terminal_inferior
should be called to get back to a normal state of affairs. */
#define target_terminal_ours_for_output() \
(*current_target.to_terminal_ours_for_output) ()
/* Put our terminal settings into effect.
First record the inferior's terminal settings
so they can be restored properly later. */
#define target_terminal_ours() \
(*current_target.to_terminal_ours) ()
/* Save our terminal settings.
This is called from TUI after entering or leaving the curses
mode. Since curses modifies our terminal this call is here
to take this change into account. */
#define target_terminal_save_ours() \
(*current_target.to_terminal_save_ours) ()
/* Print useful information about our terminal status, if such a thing
exists. */
#define target_terminal_info(arg, from_tty) \
(*current_target.to_terminal_info) (arg, from_tty)
/* Kill the inferior process. Make it go away. */
extern void target_kill (void);
/* Load an executable file into the target process. This is expected
to not only bring new code into the target process, but also to
update GDB's symbol tables to match.
ARG contains command-line arguments, to be broken down with
buildargv (). The first non-switch argument is the filename to
load, FILE; the second is a number (as parsed by strtoul (..., ...,
0)), which is an offset to apply to the load addresses of FILE's
sections. The target may define switches, or other non-switch
arguments, as it pleases. */
extern void target_load (char *arg, int from_tty);
/* Look up a symbol in the target's symbol table. NAME is the symbol
name. ADDRP is a CORE_ADDR * pointing to where the value of the
symbol should be returned. The result is 0 if successful, nonzero
if the symbol does not exist in the target environment. This
function should not call error() if communication with the target
is interrupted, since it is called from symbol reading, but should
return nonzero, possibly doing a complain(). */
#define target_lookup_symbol(name, addrp) \
(*current_target.to_lookup_symbol) (name, addrp)
/* Start an inferior process and set inferior_ptid to its pid.
EXEC_FILE is the file to run.
ALLARGS is a string containing the arguments to the program.
ENV is the environment vector to pass. Errors reported with error().
On VxWorks and various standalone systems, we ignore exec_file. */
void target_create_inferior (char *exec_file, char *args,
char **env, int from_tty);
/* Some targets (such as ttrace-based HPUX) don't allow us to request
notification of inferior events such as fork and vork immediately
after the inferior is created. (This because of how gdb gets an
inferior created via invoking a shell to do it. In such a scenario,
if the shell init file has commands in it, the shell will fork and
exec for each of those commands, and we will see each such fork
event. Very bad.)
Such targets will supply an appropriate definition for this function. */
#define target_post_startup_inferior(ptid) \
(*current_target.to_post_startup_inferior) (ptid)
/* On some targets, the sequence of starting up an inferior requires
some synchronization between gdb and the new inferior process, PID. */
#define target_acknowledge_created_inferior(pid) \
(*current_target.to_acknowledge_created_inferior) (pid)
/* On some targets, we can catch an inferior fork or vfork event when
it occurs. These functions insert/remove an already-created
catchpoint for such events. */
#define target_insert_fork_catchpoint(pid) \
(*current_target.to_insert_fork_catchpoint) (pid)
#define target_remove_fork_catchpoint(pid) \
(*current_target.to_remove_fork_catchpoint) (pid)
#define target_insert_vfork_catchpoint(pid) \
(*current_target.to_insert_vfork_catchpoint) (pid)
#define target_remove_vfork_catchpoint(pid) \
(*current_target.to_remove_vfork_catchpoint) (pid)
/* If the inferior forks or vforks, this function will be called at
the next resume in order to perform any bookkeeping and fiddling
necessary to continue debugging either the parent or child, as
requested, and releasing the other. Information about the fork
or vfork event is available via get_last_target_status ().
This function returns 1 if the inferior should not be resumed
(i.e. there is another event pending). */
int target_follow_fork (int follow_child);
/* On some targets, we can catch an inferior exec event when it
occurs. These functions insert/remove an already-created
catchpoint for such events. */
#define target_insert_exec_catchpoint(pid) \
(*current_target.to_insert_exec_catchpoint) (pid)
#define target_remove_exec_catchpoint(pid) \
(*current_target.to_remove_exec_catchpoint) (pid)
/* Syscall catch.
NEEDED is nonzero if any syscall catch (of any kind) is requested.
If NEEDED is zero, it means the target can disable the mechanism to
catch system calls because there are no more catchpoints of this type.
ANY_COUNT is nonzero if a generic (filter-less) syscall catch is
being requested. In this case, both TABLE_SIZE and TABLE should
be ignored.
TABLE_SIZE is the number of elements in TABLE. It only matters if
ANY_COUNT is zero.
TABLE is an array of ints, indexed by syscall number. An element in
this array is nonzero if that syscall should be caught. This argument
only matters if ANY_COUNT is zero. */
#define target_set_syscall_catchpoint(pid, needed, any_count, table_size, table) \
(*current_target.to_set_syscall_catchpoint) (pid, needed, any_count, \
table_size, table)
/* Returns TRUE if PID has exited. And, also sets EXIT_STATUS to the
exit code of PID, if any. */
#define target_has_exited(pid,wait_status,exit_status) \
(*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
be defined by those targets that require the debugger to perform
cleanup or internal state changes in response to the process event. */
/* The inferior process has died. Do what is right. */
void target_mourn_inferior (void);
/* Does target have enough data to do a run or attach command? */
#define target_can_run(t) \
((t)->to_can_run) ()
/* post process changes to signal handling in the inferior. */
#define target_notice_signals(ptid) \
(*current_target.to_notice_signals) (ptid)
/* Check to see if a thread is still alive. */
extern int target_thread_alive (ptid_t ptid);
/* Query for new threads and add them to the thread list. */
extern void target_find_new_threads (void);
/* Make target stop in a continuable fashion. (For instance, under
Unix, this should act like SIGSTOP). This function is normally
used by GUIs to implement a stop button. */
#define target_stop(ptid) (*current_target.to_stop) (ptid)
/* Send the specified COMMAND to the target's monitor
(shell,interpreter) for execution. The result of the query is
placed in OUTBUF. */
#define target_rcmd(command, outbuf) \
(*current_target.to_rcmd) (command, outbuf)
/* Does the target include all of memory, or only part of it? This
determines whether we look up the target chain for other parts of
memory if this target can't satisfy a request. */
extern int target_has_all_memory_1 (void);
#define target_has_all_memory target_has_all_memory_1 ()
/* Does the target include memory? (Dummy targets don't.) */
extern int target_has_memory_1 (void);
#define target_has_memory target_has_memory_1 ()
/* Does the target have a stack? (Exec files don't, VxWorks doesn't, until
we start a process.) */
extern int target_has_stack_1 (void);
#define target_has_stack target_has_stack_1 ()
/* Does the target have registers? (Exec files don't.) */
extern int target_has_registers_1 (void);
#define target_has_registers target_has_registers_1 ()
/* Does the target have execution? Can we make it jump (through
hoops), or pop its stack a few times? This means that the current
target is currently executing; for some targets, that's the same as
whether or not the target is capable of execution, but there are
also targets which can be current while not executing. In that
case this will become true after target_create_inferior or
target_attach. */
extern int target_has_execution_1 (void);
#define target_has_execution target_has_execution_1 ()
/* Default implementations for process_stratum targets. Return true
if there's a selected inferior, false otherwise. */
extern int default_child_has_all_memory (struct target_ops *ops);
extern int default_child_has_memory (struct target_ops *ops);
extern int default_child_has_stack (struct target_ops *ops);
extern int default_child_has_registers (struct target_ops *ops);
extern int default_child_has_execution (struct target_ops *ops);
/* Can the target support the debugger control of thread execution?
Can it lock the thread scheduler? */
#define target_can_lock_scheduler \
(current_target.to_has_thread_control & tc_schedlock)
/* Should the target enable async mode if it is supported? Temporary
cludge until async mode is a strict superset of sync mode. */
extern int target_async_permitted;
/* Can the target support asynchronous execution? */
#define target_can_async_p() (current_target.to_can_async_p ())
/* Is the target in asynchronous execution mode? */
#define target_is_async_p() (current_target.to_is_async_p ())
int target_supports_non_stop (void);
/* Put the target in async mode with the specified callback function. */
#define target_async(CALLBACK,CONTEXT) \
(current_target.to_async ((CALLBACK), (CONTEXT)))
/* This is to be used ONLY within call_function_by_hand(). It provides
a workaround, to have inferior function calls done in sychronous
mode, even though the target is asynchronous. After
target_async_mask(0) is called, calls to target_can_async_p() will
return FALSE , so that target_resume() will not try to start the
target asynchronously. After the inferior stops, we IMMEDIATELY
restore the previous nature of the target, by calling
target_async_mask(1). After that, target_can_async_p() will return
TRUE. ANY OTHER USE OF THIS FEATURE IS DEPRECATED.
FIXME ezannoni 1999-12-13: we won't need this once we move
the turning async on and off to the single execution commands,
from where it is done currently, in remote_resume(). */
#define target_async_mask(MASK) \
(current_target.to_async_mask (MASK))
/* Converts a process id to a string. Usually, the string just contains
`process xyz', but on some systems it may contain
`process xyz thread abc'. */
extern char *target_pid_to_str (ptid_t ptid);
extern char *normal_pid_to_str (ptid_t ptid);
/* Return a short string describing extra information about PID,
e.g. "sleeping", "runnable", "running on LWP 3". Null return value
is okay. */
#define target_extra_thread_info(TP) \
(current_target.to_extra_thread_info (TP))
/* Attempts to find the pathname of the executable file
that was run to create a specified process.
The process PID must be stopped when this operation is used.
If the executable file cannot be determined, NULL is returned.
Else, a pointer to a character string containing the pathname
is returned. This string should be copied into a buffer by
the client if the string will not be immediately used, or if
it must persist. */
#define target_pid_to_exec_file(pid) \
(current_target.to_pid_to_exec_file) (pid)
/* See the to_thread_architecture description in struct target_ops. */
#define target_thread_architecture(ptid) \
(current_target.to_thread_architecture (&current_target, ptid))
/*
* 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.
*/
#define target_find_memory_regions(FUNC, DATA) \
(current_target.to_find_memory_regions) (FUNC, DATA)
/*
* Compose corefile .note section.
*/
#define target_make_corefile_notes(BFD, SIZE_P) \
(current_target.to_make_corefile_notes) (BFD, SIZE_P)
/* Bookmark interfaces. */
#define target_get_bookmark(ARGS, FROM_TTY) \
(current_target.to_get_bookmark) (ARGS, FROM_TTY)
#define target_goto_bookmark(ARG, FROM_TTY) \
(current_target.to_goto_bookmark) (ARG, FROM_TTY)
/* Hardware watchpoint interfaces. */
/* Returns non-zero if we were stopped by a hardware watchpoint (memory read or
write). Only the INFERIOR_PTID task is being queried. */
#define target_stopped_by_watchpoint \
(*current_target.to_stopped_by_watchpoint)
/* Non-zero if we have steppable watchpoints */
#define target_have_steppable_watchpoint \
(current_target.to_have_steppable_watchpoint)
/* Non-zero if we have continuable watchpoints */
#define target_have_continuable_watchpoint \
(current_target.to_have_continuable_watchpoint)
/* Provide defaults for hardware watchpoint functions. */
/* 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
one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, or
bp_hardware_breakpoint. CNT is the number of such watchpoints used so far
(including this one?). OTHERTYPE is who knows what... */
#define target_can_use_hardware_watchpoint(TYPE,CNT,OTHERTYPE) \
(*current_target.to_can_use_hw_breakpoint) (TYPE, CNT, OTHERTYPE);
#define target_region_ok_for_hw_watchpoint(addr, len) \
(*current_target.to_region_ok_for_hw_watchpoint) (addr, len)
/* Set/clear a hardware watchpoint starting at ADDR, for LEN bytes. TYPE is 0
for write, 1 for read, and 2 for read/write accesses. Returns 0 for
success, non-zero for failure. */
#define target_insert_watchpoint(addr, len, type) \
(*current_target.to_insert_watchpoint) (addr, len, type)
#define target_remove_watchpoint(addr, len, type) \
(*current_target.to_remove_watchpoint) (addr, len, type)
#define target_insert_hw_breakpoint(gdbarch, bp_tgt) \
(*current_target.to_insert_hw_breakpoint) (gdbarch, bp_tgt)
#define target_remove_hw_breakpoint(gdbarch, bp_tgt) \
(*current_target.to_remove_hw_breakpoint) (gdbarch, bp_tgt)
/* Return non-zero if target knows the data address which triggered this
target_stopped_by_watchpoint, in such case place it to *ADDR_P. Only the
INFERIOR_PTID task is being queried. */
#define target_stopped_data_address(target, addr_p) \
(*target.to_stopped_data_address) (target, addr_p)
#define target_watchpoint_addr_within_range(target, addr, start, length) \
(*target.to_watchpoint_addr_within_range) (target, addr, start, length)
/* Target can execute in reverse? */
#define target_can_execute_reverse \
(current_target.to_can_execute_reverse ? \
current_target.to_can_execute_reverse () : 0)
extern const struct target_desc *target_read_description (struct target_ops *);
#define target_get_ada_task_ptid(lwp, tid) \
(*current_target.to_get_ada_task_ptid) (lwp,tid)
/* Utility implementation of searching memory. */
extern int simple_search_memory (struct target_ops* ops,
CORE_ADDR start_addr,
ULONGEST search_space_len,
const gdb_byte *pattern,
ULONGEST pattern_len,
CORE_ADDR *found_addrp);
/* Main entry point for searching memory. */
extern int target_search_memory (CORE_ADDR start_addr,
ULONGEST search_space_len,
const gdb_byte *pattern,
ULONGEST pattern_len,
CORE_ADDR *found_addrp);
/* Command logging facility. */
#define target_log_command(p) \
do \
if (current_target.to_log_command) \
(*current_target.to_log_command) (p); \
while (0)
/* Routines for maintenance of the target structures...
add_target: Add a target to the list of all possible targets.
push_target: Make this target the top of the stack of currently used
targets, within its particular stratum of the stack. Result
is 0 if now atop the stack, nonzero if not on top (maybe
should warn user).
unpush_target: Remove this from the stack of currently used targets,
no matter where it is on the list. Returns 0 if no
change, 1 if removed from stack.
pop_target: Remove the top thing on the stack of current targets. */
extern void add_target (struct target_ops *);
extern int push_target (struct target_ops *);
extern int unpush_target (struct target_ops *);
extern void target_pre_inferior (int);
extern void target_preopen (int);
extern void pop_target (void);
/* Does whatever cleanup is required to get rid of all pushed targets.
QUITTING is propagated to target_close; it 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). */
extern void pop_all_targets (int quitting);
/* Like pop_all_targets, but pops only targets whose stratum is
strictly above ABOVE_STRATUM. */
extern void pop_all_targets_above (enum strata above_stratum, int quitting);
extern CORE_ADDR target_translate_tls_address (struct objfile *objfile,
CORE_ADDR offset);
/* Struct target_section maps address ranges to file sections. It is
mostly used with BFD files, but can be used without (e.g. for handling
raw disks, or files not in formats handled by BFD). */
struct target_section
{
CORE_ADDR addr; /* Lowest address in section */
CORE_ADDR endaddr; /* 1+highest address in section */
struct bfd_section *the_bfd_section;
bfd *bfd; /* BFD file pointer */
};
/* Holds an array of target sections. Defined by [SECTIONS..SECTIONS_END[. */
struct target_section_table
{
struct target_section *sections;
struct target_section *sections_end;
};
/* Return the "section" containing the specified address. */
struct target_section *target_section_by_addr (struct target_ops *target,
CORE_ADDR addr);
/* Return the target section table this target (or the targets
beneath) currently manipulate. */
extern struct target_section_table *target_get_section_table
(struct target_ops *target);
/* From mem-break.c */
extern int memory_remove_breakpoint (struct gdbarch *, struct bp_target_info *);
extern int memory_insert_breakpoint (struct gdbarch *, struct bp_target_info *);
extern int default_memory_remove_breakpoint (struct gdbarch *, struct bp_target_info *);
extern int default_memory_insert_breakpoint (struct gdbarch *, struct bp_target_info *);
/* From target.c */
extern void initialize_targets (void);
extern NORETURN void noprocess (void) ATTR_NORETURN;
extern void target_require_runnable (void);
extern void find_default_attach (struct target_ops *, char *, int);
extern void find_default_create_inferior (struct target_ops *,
char *, char *, char **, int);
extern struct target_ops *find_run_target (void);
extern struct target_ops *find_core_target (void);
extern struct target_ops *find_target_beneath (struct target_ops *);
/* Read OS data object of type TYPE from the target, and return it in
XML format. The result is NUL-terminated and returned as a string,
allocated using xmalloc. If an error occurs or the transfer is
unsupported, NULL is returned. Empty objects are returned as
allocated but empty strings. */
extern char *target_get_osdata (const char *type);
/* Stuff that should be shared among the various remote targets. */
/* Debugging level. 0 is off, and non-zero values mean to print some debug
information (higher values, more information). */
extern int remote_debug;
/* Speed in bits per second, or -1 which means don't mess with the speed. */
extern int baud_rate;
/* Timeout limit for response from target. */
extern int remote_timeout;
/* Functions for helping to write a native target. */
/* This is for native targets which use a unix/POSIX-style waitstatus. */
extern void store_waitstatus (struct target_waitstatus *, int);
/* These are in common/signals.c, but they're only used by gdb. */
extern enum target_signal default_target_signal_from_host (struct gdbarch *,
int);
extern int default_target_signal_to_host (struct gdbarch *,
enum target_signal);
/* Convert from a number used in a GDB command to an enum target_signal. */
extern enum target_signal target_signal_from_command (int);
/* End of files in common/signals.c. */
/* Set the show memory breakpoints mode to show, and installs a cleanup
to restore it back to the current value. */
extern struct cleanup *make_show_memory_breakpoints_cleanup (int show);
/* Imported from machine dependent code */
/* Blank target vector entries are initialized to target_ignore. */
void target_ignore (void);
extern struct target_ops deprecated_child_ops;
#endif /* !defined (TARGET_H) */
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