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binutils-gdb/gdb/target.h
Pedro Alves 85ad3aaf40 gdb: Coalesce/aggregate (async) vCont packets/actions 
Currently, with "maint set target-non-stop on", that is, when gdb
connects with the non-stop/asynchronous variant of the remote
protocol, even with "set non-stop off", GDB always sends one vCont
packet per thread resumed.  This patch makes GDB aggregate and
coalesce vCont packets, so we send vCont packets like "vCont;s:p1.1;c"
in non-stop mode too.

Basically, this is done by:

  - Adding a new target method target_commit_resume that is called
    after calling target_resume one or more times.  When resuming a
    batch of threads, we'll only call target_commit_resume once after
    calling target_resume for all threads.

  - Making the remote target defer sending the actual vCont packet to
    target_commit_resume.

Special care must be taken to avoid sending a vCont action with a
"wildcard" thread-id (all threads of process / all threads) when that
would resume threads/processes that should not be resumed.  See
remote_commit_resume comments for details.

Unlike all-stop's remote_resume implementation, this handles the case
of too many actions resulting in a too-big vCont packet, by flushing
the vCont packet and starting a new one.

E.g., imagining that the "c" action in:

  vCont;s:1;c

overflows the packet buffer, we split the actions like:

  vCont;s:1
  vCont;c

Tested on x86_64 Fedora 20, with and without "maint set
target-non-stop on".

Also tested with a hack that makes remote_commit_resume flush the vCont
packet after every action appended (which caught a few bugs).

gdb/ChangeLog:
2016-10-26  Pedro Alves  <palves@redhat.com>

	* inferior.h (ALL_NON_EXITED_INFERIORS): New macro.
	* infrun.c (do_target_resume): Call target_commit_resume.
	(proceed): Defer target_commit_resume while looping over threads,
	resuming them.  Call target_commit_resume at the end.
	* record-btrace.c (record_btrace_commit_resume): New function.
	(init_record_btrace_ops): Install it as to_commit_resume method.
	* record-full.c (record_full_commit_resume): New function.
	(record_full_wait_1): Call the beneath target's to_commit_resume
	method.
	(init_record_full_ops): Install record_full_commit_resume as
	to_commit_resume method.
	* remote.c (struct private_thread_info) <last_resume_step,
	last_resume_sig, vcont_resumed>: New fields.
	(remote_add_thread): Set the new thread's vcont_resumed flag.
	(demand_private_info): Delete.
	(get_private_info_thread, get_private_info_ptid): New functions.
	(remote_update_thread_list): Adjust.
	(process_initial_stop_replies): Clear the thread's vcont_resumed
	flag.
	(remote_resume): If connected in non-stop mode, record the resume
	request and return early.
	(struct private_inferior): New.
	(struct vcont_builder): New.
	(vcont_builder_restart, vcont_builder_flush)
	(vcont_builder_push_action): New functions.
	(MAX_ACTION_SIZE): New macro.
	(remote_commit_resume): New function.
	(thread_pending_fork_status, is_pending_fork_parent_thread): New
	functions.
	(check_pending_event_prevents_wildcard_vcont_callback)
	(check_pending_events_prevent_wildcard_vcont): New functions.
	(process_stop_reply): Adjust.  Clear the thread's vcont_resumed
	flag.
	(init_remote_ops): Install remote_commit_resume.
	* target-delegates.c: Regenerate.
	* target.c (defer_target_commit_resume): New global.
	(target_commit_resume, make_cleanup_defer_target_commit_resume):
	New functions.
	* target.h (struct target_ops) <to_commit_resume>: New field.
	(target_resume): Update comments.
	(target_commit_resume): New declaration.
2016-10-26 16:22:50 +01:00

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/* Interface between GDB and target environments, including files and processes
Copyright (C) 1990-2016 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_location;
struct bp_target_info;
struct regcache;
struct target_section_table;
struct trace_state_variable;
struct trace_status;
struct uploaded_tsv;
struct uploaded_tp;
struct static_tracepoint_marker;
struct traceframe_info;
struct expression;
struct dcache_struct;
struct inferior;
#include "infrun.h" /* For enum exec_direction_kind. */
#include "breakpoint.h" /* For enum bptype. */
/* 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 "target/target.h"
#include "target/resume.h"
#include "target/wait.h"
#include "target/waitstatus.h"
#include "bfd.h"
#include "symtab.h"
#include "memattr.h"
#include "vec.h"
#include "gdb_signals.h"
#include "btrace.h"
#include "command.h"
#include "break-common.h" /* For enum target_hw_bp_type. */
enum strata
{
dummy_stratum, /* The lowest of the low */
file_stratum, /* Executable files, etc */
process_stratum, /* Executing processes or core dump files */
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. */
};
/* 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 *);
/* Return a pretty printed form of TARGET_OPTIONS.
Space for the result is malloc'd, caller must free. */
extern char *target_options_to_string (int target_options);
/* Possible types of events that the inferior handler will have to
deal with. */
enum inferior_event_type
{
/* Process a normal inferior event which will result in target_wait
being called. */
INF_REG_EVENT,
/* We are called to do stuff after the inferior stops. */
INF_EXEC_COMPLETE,
};
/* 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,
/* Memory known to be part of the target code. This is cached even
if it is not in a region marked as such. */
TARGET_OBJECT_CODE_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,
/* Currently loaded libraries specific for SVR4 systems, in XML format. */
TARGET_OBJECT_LIBRARIES_SVR4,
/* Currently loaded libraries specific to AIX systems, in XML format. */
TARGET_OBJECT_LIBRARIES_AIX,
/* Get OS specific data. The ANNEX specifies the type (running
processes, etc.). The data being transfered is expected to follow
the DTD specified in features/osdata.dtd. */
TARGET_OBJECT_OSDATA,
/* Extra signal info. Usually the contents of `siginfo_t' on unix
platforms. */
TARGET_OBJECT_SIGNAL_INFO,
/* The list of threads that are being debugged. */
TARGET_OBJECT_THREADS,
/* Collected static trace data. */
TARGET_OBJECT_STATIC_TRACE_DATA,
/* The HP-UX registers (those that can be obtained or modified by using
the TT_LWP_RUREGS/TT_LWP_WUREGS ttrace requests). */
TARGET_OBJECT_HPUX_UREGS,
/* The HP-UX shared library linkage pointer. ANNEX should be a string
image of the code address whose linkage pointer we are looking for.
The size of the data transfered is always 8 bytes (the size of an
address on ia64). */
TARGET_OBJECT_HPUX_SOLIB_GOT,
/* Traceframe info, in XML format. */
TARGET_OBJECT_TRACEFRAME_INFO,
/* Load maps for FDPIC systems. */
TARGET_OBJECT_FDPIC,
/* Darwin dynamic linker info data. */
TARGET_OBJECT_DARWIN_DYLD_INFO,
/* OpenVMS Unwind Information Block. */
TARGET_OBJECT_OPENVMS_UIB,
/* Branch trace data, in XML format. */
TARGET_OBJECT_BTRACE,
/* Branch trace configuration, in XML format. */
TARGET_OBJECT_BTRACE_CONF,
/* The pathname of the executable file that was run to create
a specified process. ANNEX should be a string representation
of the process ID of the process in question, in hexadecimal
format. */
TARGET_OBJECT_EXEC_FILE,
/* Possible future objects: TARGET_OBJECT_FILE, ... */
};
/* Possible values returned by target_xfer_partial, etc. */
enum target_xfer_status
{
/* Some bytes are transferred. */
TARGET_XFER_OK = 1,
/* No further transfer is possible. */
TARGET_XFER_EOF = 0,
/* The piece of the object requested is unavailable. */
TARGET_XFER_UNAVAILABLE = 2,
/* Generic I/O error. Note that it's important that this is '-1',
as we still have target_xfer-related code returning hardcoded
'-1' on error. */
TARGET_XFER_E_IO = -1,
/* Keep list in sync with target_xfer_status_to_string. */
};
/* Return the string form of STATUS. */
extern const char *
target_xfer_status_to_string (enum target_xfer_status status);
/* Enumeration of the kinds of traceframe searches that a target may
be able to perform. */
enum trace_find_type
{
tfind_number,
tfind_pc,
tfind_tp,
tfind_range,
tfind_outside,
};
typedef struct static_tracepoint_marker *static_tracepoint_marker_p;
DEF_VEC_P(static_tracepoint_marker_p);
typedef enum target_xfer_status
target_xfer_partial_ftype (struct target_ops *ops,
enum target_object object,
const char *annex,
gdb_byte *readbuf,
const gdb_byte *writebuf,
ULONGEST offset,
ULONGEST len,
ULONGEST *xfered_len);
enum target_xfer_status
raw_memory_xfer_partial (struct target_ops *ops, gdb_byte *readbuf,
const gdb_byte *writebuf, ULONGEST memaddr,
LONGEST len, ULONGEST *xfered_len);
/* Request that OPS transfer up to LEN addressable units of the target's
OBJECT. When reading from a memory object, the size of an addressable unit
is architecture dependent and can be found using
gdbarch_addressable_memory_unit_size. Otherwise, an addressable unit is 1
byte long. BUF should point to a buffer large enough to hold the read data,
taking into account the addressable unit size. 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 addressable units actually transferred, or a negative
error code (an 'enum target_xfer_error' value) 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);
struct memory_read_result
{
/* First address that was read. */
ULONGEST begin;
/* Past-the-end address. */
ULONGEST end;
/* The data. */
gdb_byte *data;
};
typedef struct memory_read_result memory_read_result_s;
DEF_VEC_O(memory_read_result_s);
extern void free_memory_read_result_vector (void *);
extern VEC(memory_read_result_s)* read_memory_robust (struct target_ops *ops,
const ULONGEST offset,
const LONGEST len);
/* Request that OPS transfer up to LEN addressable units from BUF to the
target's OBJECT. When writing to a memory object, the addressable unit
size is architecture dependent and can be found using
gdbarch_addressable_memory_unit_size. Otherwise, an addressable unit is 1
byte long. 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 addressable units actually transferred, or a negative
error code (an 'enum target_xfer_status' value) 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_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);
/* See target_ops->to_xfer_partial. */
extern target_xfer_partial_ftype target_xfer_partial;
/* 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: */
/* The type of the callback to the to_async method. */
typedef void async_callback_ftype (enum inferior_event_type event_type,
void *context);
/* Normally target debug printing is purely type-based. However,
sometimes it is necessary to override the debug printing on a
per-argument basis. This macro can be used, attribute-style, to
name the target debug printing function for a particular method
argument. FUNC is the name of the function. The macro's
definition is empty because it is only used by the
make-target-delegates script. */
#define TARGET_DEBUG_PRINTER(FUNC)
/* These defines are used to mark target_ops methods. The script
make-target-delegates scans these and auto-generates the base
method implementations. There are four macros that can be used:
1. TARGET_DEFAULT_IGNORE. There is no argument. The base method
does nothing. This is only valid if the method return type is
'void'.
2. TARGET_DEFAULT_NORETURN. The argument is a function call, like
'tcomplain ()'. The base method simply makes this call, which is
assumed not to return.
3. TARGET_DEFAULT_RETURN. The argument is a C expression. The
base method returns this expression's value.
4. TARGET_DEFAULT_FUNC. The argument is the name of a function.
make-target-delegates does not generate a base method in this case,
but instead uses the argument function as the base method. */
#define TARGET_DEFAULT_IGNORE()
#define TARGET_DEFAULT_NORETURN(ARG)
#define TARGET_DEFAULT_RETURN(ARG)
#define TARGET_DEFAULT_FUNC(ARG)
struct target_ops
{
struct target_ops *beneath; /* To the target under this one. */
const char *to_shortname; /* Name this target type */
const char *to_longname; /* Name for printing */
const 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) (const 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);
void (*to_close) (struct target_ops *);
/* 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 (*to_attach) (struct target_ops *ops, const char *, int);
void (*to_post_attach) (struct target_ops *, int)
TARGET_DEFAULT_IGNORE ();
void (*to_detach) (struct target_ops *ops, const char *, int)
TARGET_DEFAULT_IGNORE ();
void (*to_disconnect) (struct target_ops *, const char *, int)
TARGET_DEFAULT_NORETURN (tcomplain ());
void (*to_resume) (struct target_ops *, ptid_t,
int TARGET_DEBUG_PRINTER (target_debug_print_step),
enum gdb_signal)
TARGET_DEFAULT_NORETURN (noprocess ());
void (*to_commit_resume) (struct target_ops *)
TARGET_DEFAULT_IGNORE ();
ptid_t (*to_wait) (struct target_ops *,
ptid_t, struct target_waitstatus *,
int TARGET_DEBUG_PRINTER (target_debug_print_options))
TARGET_DEFAULT_FUNC (default_target_wait);
void (*to_fetch_registers) (struct target_ops *, struct regcache *, int)
TARGET_DEFAULT_IGNORE ();
void (*to_store_registers) (struct target_ops *, struct regcache *, int)
TARGET_DEFAULT_NORETURN (noprocess ());
void (*to_prepare_to_store) (struct target_ops *, struct regcache *)
TARGET_DEFAULT_NORETURN (noprocess ());
void (*to_files_info) (struct target_ops *)
TARGET_DEFAULT_IGNORE ();
int (*to_insert_breakpoint) (struct target_ops *, struct gdbarch *,
struct bp_target_info *)
TARGET_DEFAULT_FUNC (memory_insert_breakpoint);
int (*to_remove_breakpoint) (struct target_ops *, struct gdbarch *,
struct bp_target_info *,
enum remove_bp_reason)
TARGET_DEFAULT_FUNC (memory_remove_breakpoint);
/* Returns true if the target stopped because it executed a
software breakpoint. This is necessary for correct background
execution / non-stop mode operation, and for correct PC
adjustment on targets where the PC needs to be adjusted when a
software breakpoint triggers. In these modes, by the time GDB
processes a breakpoint event, the breakpoint may already be
done from the target, so GDB needs to be able to tell whether
it should ignore the event and whether it should adjust the PC.
See adjust_pc_after_break. */
int (*to_stopped_by_sw_breakpoint) (struct target_ops *)
TARGET_DEFAULT_RETURN (0);
/* Returns true if the above method is supported. */
int (*to_supports_stopped_by_sw_breakpoint) (struct target_ops *)
TARGET_DEFAULT_RETURN (0);
/* Returns true if the target stopped for a hardware breakpoint.
Likewise, if the target supports hardware breakpoints, this
method is necessary for correct background execution / non-stop
mode operation. Even though hardware breakpoints do not
require PC adjustment, GDB needs to be able to tell whether the
hardware breakpoint event is a delayed event for a breakpoint
that is already gone and should thus be ignored. */
int (*to_stopped_by_hw_breakpoint) (struct target_ops *)
TARGET_DEFAULT_RETURN (0);
/* Returns true if the above method is supported. */
int (*to_supports_stopped_by_hw_breakpoint) (struct target_ops *)
TARGET_DEFAULT_RETURN (0);
int (*to_can_use_hw_breakpoint) (struct target_ops *,
enum bptype, int, int)
TARGET_DEFAULT_RETURN (0);
int (*to_ranged_break_num_registers) (struct target_ops *)
TARGET_DEFAULT_RETURN (-1);
int (*to_insert_hw_breakpoint) (struct target_ops *,
struct gdbarch *, struct bp_target_info *)
TARGET_DEFAULT_RETURN (-1);
int (*to_remove_hw_breakpoint) (struct target_ops *,
struct gdbarch *, struct bp_target_info *)
TARGET_DEFAULT_RETURN (-1);
/* Documentation of what the two routines below are expected to do is
provided with the corresponding target_* macros. */
int (*to_remove_watchpoint) (struct target_ops *, CORE_ADDR, int,
enum target_hw_bp_type, struct expression *)
TARGET_DEFAULT_RETURN (-1);
int (*to_insert_watchpoint) (struct target_ops *, CORE_ADDR, int,
enum target_hw_bp_type, struct expression *)
TARGET_DEFAULT_RETURN (-1);
int (*to_insert_mask_watchpoint) (struct target_ops *,
CORE_ADDR, CORE_ADDR,
enum target_hw_bp_type)
TARGET_DEFAULT_RETURN (1);
int (*to_remove_mask_watchpoint) (struct target_ops *,
CORE_ADDR, CORE_ADDR,
enum target_hw_bp_type)
TARGET_DEFAULT_RETURN (1);
int (*to_stopped_by_watchpoint) (struct target_ops *)
TARGET_DEFAULT_RETURN (0);
int to_have_steppable_watchpoint;
int to_have_continuable_watchpoint;
int (*to_stopped_data_address) (struct target_ops *, CORE_ADDR *)
TARGET_DEFAULT_RETURN (0);
int (*to_watchpoint_addr_within_range) (struct target_ops *,
CORE_ADDR, CORE_ADDR, int)
TARGET_DEFAULT_FUNC (default_watchpoint_addr_within_range);
/* Documentation of this routine is provided with the corresponding
target_* macro. */
int (*to_region_ok_for_hw_watchpoint) (struct target_ops *,
CORE_ADDR, int)
TARGET_DEFAULT_FUNC (default_region_ok_for_hw_watchpoint);
int (*to_can_accel_watchpoint_condition) (struct target_ops *,
CORE_ADDR, int, int,
struct expression *)
TARGET_DEFAULT_RETURN (0);
int (*to_masked_watch_num_registers) (struct target_ops *,
CORE_ADDR, CORE_ADDR)
TARGET_DEFAULT_RETURN (-1);
/* Return 1 for sure target can do single step. Return -1 for
unknown. Return 0 for target can't do. */
int (*to_can_do_single_step) (struct target_ops *)
TARGET_DEFAULT_RETURN (-1);
void (*to_terminal_init) (struct target_ops *)
TARGET_DEFAULT_IGNORE ();
void (*to_terminal_inferior) (struct target_ops *)
TARGET_DEFAULT_IGNORE ();
void (*to_terminal_ours_for_output) (struct target_ops *)
TARGET_DEFAULT_IGNORE ();
void (*to_terminal_ours) (struct target_ops *)
TARGET_DEFAULT_IGNORE ();
void (*to_terminal_info) (struct target_ops *, const char *, int)
TARGET_DEFAULT_FUNC (default_terminal_info);
void (*to_kill) (struct target_ops *)
TARGET_DEFAULT_NORETURN (noprocess ());
void (*to_load) (struct target_ops *, const char *, int)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* 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 (*to_create_inferior) (struct target_ops *,
char *, char *, char **, int);
void (*to_post_startup_inferior) (struct target_ops *, ptid_t)
TARGET_DEFAULT_IGNORE ();
int (*to_insert_fork_catchpoint) (struct target_ops *, int)
TARGET_DEFAULT_RETURN (1);
int (*to_remove_fork_catchpoint) (struct target_ops *, int)
TARGET_DEFAULT_RETURN (1);
int (*to_insert_vfork_catchpoint) (struct target_ops *, int)
TARGET_DEFAULT_RETURN (1);
int (*to_remove_vfork_catchpoint) (struct target_ops *, int)
TARGET_DEFAULT_RETURN (1);
int (*to_follow_fork) (struct target_ops *, int, int)
TARGET_DEFAULT_FUNC (default_follow_fork);
int (*to_insert_exec_catchpoint) (struct target_ops *, int)
TARGET_DEFAULT_RETURN (1);
int (*to_remove_exec_catchpoint) (struct target_ops *, int)
TARGET_DEFAULT_RETURN (1);
void (*to_follow_exec) (struct target_ops *, struct inferior *, char *)
TARGET_DEFAULT_IGNORE ();
int (*to_set_syscall_catchpoint) (struct target_ops *,
int, int, int, int, int *)
TARGET_DEFAULT_RETURN (1);
int (*to_has_exited) (struct target_ops *, int, int, int *)
TARGET_DEFAULT_RETURN (0);
void (*to_mourn_inferior) (struct target_ops *)
TARGET_DEFAULT_FUNC (default_mourn_inferior);
/* Note that to_can_run is special and can be invoked on an
unpushed target. Targets defining this method must also define
to_can_async_p and to_supports_non_stop. */
int (*to_can_run) (struct target_ops *)
TARGET_DEFAULT_RETURN (0);
/* Documentation of this routine is provided with the corresponding
target_* macro. */
void (*to_pass_signals) (struct target_ops *, int,
unsigned char * TARGET_DEBUG_PRINTER (target_debug_print_signals))
TARGET_DEFAULT_IGNORE ();
/* Documentation of this routine is provided with the
corresponding target_* function. */
void (*to_program_signals) (struct target_ops *, int,
unsigned char * TARGET_DEBUG_PRINTER (target_debug_print_signals))
TARGET_DEFAULT_IGNORE ();
int (*to_thread_alive) (struct target_ops *, ptid_t ptid)
TARGET_DEFAULT_RETURN (0);
void (*to_update_thread_list) (struct target_ops *)
TARGET_DEFAULT_IGNORE ();
char *(*to_pid_to_str) (struct target_ops *, ptid_t)
TARGET_DEFAULT_FUNC (default_pid_to_str);
char *(*to_extra_thread_info) (struct target_ops *, struct thread_info *)
TARGET_DEFAULT_RETURN (NULL);
const char *(*to_thread_name) (struct target_ops *, struct thread_info *)
TARGET_DEFAULT_RETURN (NULL);
void (*to_stop) (struct target_ops *, ptid_t)
TARGET_DEFAULT_IGNORE ();
void (*to_interrupt) (struct target_ops *, ptid_t)
TARGET_DEFAULT_IGNORE ();
void (*to_pass_ctrlc) (struct target_ops *)
TARGET_DEFAULT_FUNC (default_target_pass_ctrlc);
void (*to_rcmd) (struct target_ops *,
const char *command, struct ui_file *output)
TARGET_DEFAULT_FUNC (default_rcmd);
char *(*to_pid_to_exec_file) (struct target_ops *, int pid)
TARGET_DEFAULT_RETURN (NULL);
void (*to_log_command) (struct target_ops *, const char *)
TARGET_DEFAULT_IGNORE ();
struct target_section_table *(*to_get_section_table) (struct target_ops *)
TARGET_DEFAULT_RETURN (NULL);
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 *, ptid_t);
int to_has_thread_control; /* control thread execution */
int to_attach_no_wait;
/* This method must be implemented in some situations. See the
comment on 'to_can_run'. */
int (*to_can_async_p) (struct target_ops *)
TARGET_DEFAULT_RETURN (0);
int (*to_is_async_p) (struct target_ops *)
TARGET_DEFAULT_RETURN (0);
void (*to_async) (struct target_ops *, int)
TARGET_DEFAULT_NORETURN (tcomplain ());
void (*to_thread_events) (struct target_ops *, int)
TARGET_DEFAULT_IGNORE ();
/* This method must be implemented in some situations. See the
comment on 'to_can_run'. */
int (*to_supports_non_stop) (struct target_ops *)
TARGET_DEFAULT_RETURN (0);
/* Return true if the target operates in non-stop mode even with
"set non-stop off". */
int (*to_always_non_stop_p) (struct target_ops *)
TARGET_DEFAULT_RETURN (0);
/* find_memory_regions support method for gcore */
int (*to_find_memory_regions) (struct target_ops *,
find_memory_region_ftype func, void *data)
TARGET_DEFAULT_FUNC (dummy_find_memory_regions);
/* make_corefile_notes support method for gcore */
char * (*to_make_corefile_notes) (struct target_ops *, bfd *, int *)
TARGET_DEFAULT_FUNC (dummy_make_corefile_notes);
/* get_bookmark support method for bookmarks */
gdb_byte * (*to_get_bookmark) (struct target_ops *, const char *, int)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* goto_bookmark support method for bookmarks */
void (*to_goto_bookmark) (struct target_ops *, const gdb_byte *, int)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* 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. LOAD_MODULE_ADDR may be zero for statically
linked multithreaded inferiors. */
CORE_ADDR (*to_get_thread_local_address) (struct target_ops *ops,
ptid_t ptid,
CORE_ADDR load_module_addr,
CORE_ADDR offset)
TARGET_DEFAULT_NORETURN (generic_tls_error ());
/* 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 transferred status, error or OK (an
'enum target_xfer_status' value). Save the number of bytes
actually transferred in *XFERED_LEN if transfer is successful
(TARGET_XFER_OK) or the number unavailable bytes if the requested
data is unavailable (TARGET_XFER_UNAVAILABLE). *XFERED_LEN
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. */
enum target_xfer_status (*to_xfer_partial) (struct target_ops *ops,
enum target_object object,
const char *annex,
gdb_byte *readbuf,
const gdb_byte *writebuf,
ULONGEST offset, ULONGEST len,
ULONGEST *xfered_len)
TARGET_DEFAULT_RETURN (TARGET_XFER_E_IO);
/* Return the limit on the size of any single memory transfer
for the target. */
ULONGEST (*to_get_memory_xfer_limit) (struct target_ops *)
TARGET_DEFAULT_RETURN (ULONGEST_MAX);
/* 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 *)
TARGET_DEFAULT_RETURN (NULL);
/* 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)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* 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 *)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Describe the architecture-specific features of this target. If
OPS doesn't have a description, this should delegate to the
"beneath" target. Returns the description found, or NULL if no
description was available. */
const struct target_desc *(*to_read_description) (struct target_ops *ops)
TARGET_DEFAULT_RETURN (NULL);
/* 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) (struct target_ops *,
long lwp, long thread)
TARGET_DEFAULT_FUNC (default_get_ada_task_ptid);
/* 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)
TARGET_DEFAULT_FUNC (default_auxv_parse);
/* 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)
TARGET_DEFAULT_FUNC (default_search_memory);
/* Can target execute in reverse? */
int (*to_can_execute_reverse) (struct target_ops *)
TARGET_DEFAULT_RETURN (0);
/* The direction the target is currently executing. Must be
implemented on targets that support reverse execution and async
mode. The default simply returns forward execution. */
enum exec_direction_kind (*to_execution_direction) (struct target_ops *)
TARGET_DEFAULT_FUNC (default_execution_direction);
/* Does this target support debugging multiple processes
simultaneously? */
int (*to_supports_multi_process) (struct target_ops *)
TARGET_DEFAULT_RETURN (0);
/* Does this target support enabling and disabling tracepoints while a trace
experiment is running? */
int (*to_supports_enable_disable_tracepoint) (struct target_ops *)
TARGET_DEFAULT_RETURN (0);
/* Does this target support disabling address space randomization? */
int (*to_supports_disable_randomization) (struct target_ops *);
/* Does this target support the tracenz bytecode for string collection? */
int (*to_supports_string_tracing) (struct target_ops *)
TARGET_DEFAULT_RETURN (0);
/* Does this target support evaluation of breakpoint conditions on its
end? */
int (*to_supports_evaluation_of_breakpoint_conditions) (struct target_ops *)
TARGET_DEFAULT_RETURN (0);
/* Does this target support evaluation of breakpoint commands on its
end? */
int (*to_can_run_breakpoint_commands) (struct target_ops *)
TARGET_DEFAULT_RETURN (0);
/* 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)
TARGET_DEFAULT_FUNC (default_thread_architecture);
/* 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)
TARGET_DEFAULT_FUNC (default_thread_address_space);
/* Target file operations. */
/* Return nonzero if the filesystem seen by the current inferior
is the local filesystem, zero otherwise. */
int (*to_filesystem_is_local) (struct target_ops *)
TARGET_DEFAULT_RETURN (1);
/* Open FILENAME on the target, in the filesystem as seen by INF,
using FLAGS and MODE. If INF is NULL, use the filesystem seen
by the debugger (GDB or, for remote targets, the remote stub).
If WARN_IF_SLOW is nonzero, print a warning message if the file
is being accessed over a link that may be slow. Return a
target file descriptor, or -1 if an error occurs (and set
*TARGET_ERRNO). */
int (*to_fileio_open) (struct target_ops *,
struct inferior *inf, const char *filename,
int flags, int mode, int warn_if_slow,
int *target_errno);
/* Write up to LEN bytes from WRITE_BUF to FD on the target.
Return the number of bytes written, or -1 if an error occurs
(and set *TARGET_ERRNO). */
int (*to_fileio_pwrite) (struct target_ops *,
int fd, const gdb_byte *write_buf, int len,
ULONGEST offset, int *target_errno);
/* Read up to LEN bytes FD on the target into READ_BUF.
Return the number of bytes read, or -1 if an error occurs
(and set *TARGET_ERRNO). */
int (*to_fileio_pread) (struct target_ops *,
int fd, gdb_byte *read_buf, int len,
ULONGEST offset, int *target_errno);
/* Get information about the file opened as FD and put it in
SB. Return 0 on success, or -1 if an error occurs (and set
*TARGET_ERRNO). */
int (*to_fileio_fstat) (struct target_ops *,
int fd, struct stat *sb, int *target_errno);
/* Close FD on the target. Return 0, or -1 if an error occurs
(and set *TARGET_ERRNO). */
int (*to_fileio_close) (struct target_ops *, int fd, int *target_errno);
/* Unlink FILENAME on the target, in the filesystem as seen by
INF. If INF is NULL, use the filesystem seen by the debugger
(GDB or, for remote targets, the remote stub). Return 0, or
-1 if an error occurs (and set *TARGET_ERRNO). */
int (*to_fileio_unlink) (struct target_ops *,
struct inferior *inf,
const char *filename,
int *target_errno);
/* Read value of symbolic link FILENAME on the target, in the
filesystem as seen by INF. If INF is NULL, use the filesystem
seen by the debugger (GDB or, for remote targets, the remote
stub). Return a null-terminated string allocated via xmalloc,
or NULL if an error occurs (and set *TARGET_ERRNO). */
char *(*to_fileio_readlink) (struct target_ops *,
struct inferior *inf,
const char *filename,
int *target_errno);
/* Implement the "info proc" command. */
void (*to_info_proc) (struct target_ops *, const char *,
enum info_proc_what);
/* Tracepoint-related operations. */
/* Prepare the target for a tracing run. */
void (*to_trace_init) (struct target_ops *)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Send full details of a tracepoint location to the target. */
void (*to_download_tracepoint) (struct target_ops *,
struct bp_location *location)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Is the target able to download tracepoint locations in current
state? */
int (*to_can_download_tracepoint) (struct target_ops *)
TARGET_DEFAULT_RETURN (0);
/* Send full details of a trace state variable to the target. */
void (*to_download_trace_state_variable) (struct target_ops *,
struct trace_state_variable *tsv)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Enable a tracepoint on the target. */
void (*to_enable_tracepoint) (struct target_ops *,
struct bp_location *location)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Disable a tracepoint on the target. */
void (*to_disable_tracepoint) (struct target_ops *,
struct bp_location *location)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Inform the target info of memory regions that are readonly
(such as text sections), and so it should return data from
those rather than look in the trace buffer. */
void (*to_trace_set_readonly_regions) (struct target_ops *)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Start a trace run. */
void (*to_trace_start) (struct target_ops *)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Get the current status of a tracing run. */
int (*to_get_trace_status) (struct target_ops *, struct trace_status *ts)
TARGET_DEFAULT_RETURN (-1);
void (*to_get_tracepoint_status) (struct target_ops *,
struct breakpoint *tp,
struct uploaded_tp *utp)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Stop a trace run. */
void (*to_trace_stop) (struct target_ops *)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Ask the target to find a trace frame of the given type TYPE,
using NUM, ADDR1, and ADDR2 as search parameters. Returns the
number of the trace frame, and also the tracepoint number at
TPP. If no trace frame matches, return -1. May throw if the
operation fails. */
int (*to_trace_find) (struct target_ops *,
enum trace_find_type type, int num,
CORE_ADDR addr1, CORE_ADDR addr2, int *tpp)
TARGET_DEFAULT_RETURN (-1);
/* Get the value of the trace state variable number TSV, returning
1 if the value is known and writing the value itself into the
location pointed to by VAL, else returning 0. */
int (*to_get_trace_state_variable_value) (struct target_ops *,
int tsv, LONGEST *val)
TARGET_DEFAULT_RETURN (0);
int (*to_save_trace_data) (struct target_ops *, const char *filename)
TARGET_DEFAULT_NORETURN (tcomplain ());
int (*to_upload_tracepoints) (struct target_ops *,
struct uploaded_tp **utpp)
TARGET_DEFAULT_RETURN (0);
int (*to_upload_trace_state_variables) (struct target_ops *,
struct uploaded_tsv **utsvp)
TARGET_DEFAULT_RETURN (0);
LONGEST (*to_get_raw_trace_data) (struct target_ops *, gdb_byte *buf,
ULONGEST offset, LONGEST len)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Get the minimum length of instruction on which a fast tracepoint
may be set on the target. If this operation is unsupported,
return -1. If for some reason the minimum length cannot be
determined, return 0. */
int (*to_get_min_fast_tracepoint_insn_len) (struct target_ops *)
TARGET_DEFAULT_RETURN (-1);
/* Set the target's tracing behavior in response to unexpected
disconnection - set VAL to 1 to keep tracing, 0 to stop. */
void (*to_set_disconnected_tracing) (struct target_ops *, int val)
TARGET_DEFAULT_IGNORE ();
void (*to_set_circular_trace_buffer) (struct target_ops *, int val)
TARGET_DEFAULT_IGNORE ();
/* Set the size of trace buffer in the target. */
void (*to_set_trace_buffer_size) (struct target_ops *, LONGEST val)
TARGET_DEFAULT_IGNORE ();
/* Add/change textual notes about the trace run, returning 1 if
successful, 0 otherwise. */
int (*to_set_trace_notes) (struct target_ops *,
const char *user, const char *notes,
const char *stopnotes)
TARGET_DEFAULT_RETURN (0);
/* Return the processor core that thread PTID was last seen on.
This information is updated only when:
- update_thread_list is called
- thread stops
If the core cannot be determined -- either for the specified
thread, or right now, or in this debug session, or for this
target -- return -1. */
int (*to_core_of_thread) (struct target_ops *, ptid_t ptid)
TARGET_DEFAULT_RETURN (-1);
/* Verify that the memory in the [MEMADDR, MEMADDR+SIZE) range
matches the contents of [DATA,DATA+SIZE). Returns 1 if there's
a match, 0 if there's a mismatch, and -1 if an error is
encountered while reading memory. */
int (*to_verify_memory) (struct target_ops *, const gdb_byte *data,
CORE_ADDR memaddr, ULONGEST size)
TARGET_DEFAULT_FUNC (default_verify_memory);
/* Return the address of the start of the Thread Information Block
a Windows OS specific feature. */
int (*to_get_tib_address) (struct target_ops *,
ptid_t ptid, CORE_ADDR *addr)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Send the new settings of write permission variables. */
void (*to_set_permissions) (struct target_ops *)
TARGET_DEFAULT_IGNORE ();
/* Look for a static tracepoint marker at ADDR, and fill in MARKER
with its details. Return 1 on success, 0 on failure. */
int (*to_static_tracepoint_marker_at) (struct target_ops *, CORE_ADDR,
struct static_tracepoint_marker *marker)
TARGET_DEFAULT_RETURN (0);
/* Return a vector of all tracepoints markers string id ID, or all
markers if ID is NULL. */
VEC(static_tracepoint_marker_p) *(*to_static_tracepoint_markers_by_strid) (struct target_ops *, const char *id)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Return a traceframe info object describing the current
traceframe's contents. This method should not cache data;
higher layers take care of caching, invalidating, and
re-fetching when necessary. */
struct traceframe_info *(*to_traceframe_info) (struct target_ops *)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Ask the target to use or not to use agent according to USE. Return 1
successful, 0 otherwise. */
int (*to_use_agent) (struct target_ops *, int use)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Is the target able to use agent in current state? */
int (*to_can_use_agent) (struct target_ops *)
TARGET_DEFAULT_RETURN (0);
/* Check whether the target supports branch tracing. */
int (*to_supports_btrace) (struct target_ops *, enum btrace_format)
TARGET_DEFAULT_RETURN (0);
/* Enable branch tracing for PTID using CONF configuration.
Return a branch trace target information struct for reading and for
disabling branch trace. */
struct btrace_target_info *(*to_enable_btrace) (struct target_ops *,
ptid_t ptid,
const struct btrace_config *conf)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Disable branch tracing and deallocate TINFO. */
void (*to_disable_btrace) (struct target_ops *,
struct btrace_target_info *tinfo)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Disable branch tracing and deallocate TINFO. This function is similar
to to_disable_btrace, except that it is called during teardown and is
only allowed to perform actions that are safe. A counter-example would
be attempting to talk to a remote target. */
void (*to_teardown_btrace) (struct target_ops *,
struct btrace_target_info *tinfo)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Read branch trace data for the thread indicated by BTINFO into DATA.
DATA is cleared before new trace is added. */
enum btrace_error (*to_read_btrace) (struct target_ops *self,
struct btrace_data *data,
struct btrace_target_info *btinfo,
enum btrace_read_type type)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Get the branch trace configuration. */
const struct btrace_config *(*to_btrace_conf) (struct target_ops *self,
const struct btrace_target_info *)
TARGET_DEFAULT_RETURN (NULL);
/* Stop trace recording. */
void (*to_stop_recording) (struct target_ops *)
TARGET_DEFAULT_IGNORE ();
/* Print information about the recording. */
void (*to_info_record) (struct target_ops *)
TARGET_DEFAULT_IGNORE ();
/* Save the recorded execution trace into a file. */
void (*to_save_record) (struct target_ops *, const char *filename)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Delete the recorded execution trace from the current position
onwards. */
void (*to_delete_record) (struct target_ops *)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Query if the record target is currently replaying PTID. */
int (*to_record_is_replaying) (struct target_ops *, ptid_t ptid)
TARGET_DEFAULT_RETURN (0);
/* Query if the record target will replay PTID if it were resumed in
execution direction DIR. */
int (*to_record_will_replay) (struct target_ops *, ptid_t ptid, int dir)
TARGET_DEFAULT_RETURN (0);
/* Stop replaying. */
void (*to_record_stop_replaying) (struct target_ops *)
TARGET_DEFAULT_IGNORE ();
/* Go to the begin of the execution trace. */
void (*to_goto_record_begin) (struct target_ops *)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Go to the end of the execution trace. */
void (*to_goto_record_end) (struct target_ops *)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Go to a specific location in the recorded execution trace. */
void (*to_goto_record) (struct target_ops *, ULONGEST insn)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Disassemble SIZE instructions in the recorded execution trace from
the current position.
If SIZE < 0, disassemble abs (SIZE) preceding instructions; otherwise,
disassemble SIZE succeeding instructions. */
void (*to_insn_history) (struct target_ops *, int size, int flags)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Disassemble SIZE instructions in the recorded execution trace around
FROM.
If SIZE < 0, disassemble abs (SIZE) instructions before FROM; otherwise,
disassemble SIZE instructions after FROM. */
void (*to_insn_history_from) (struct target_ops *,
ULONGEST from, int size, int flags)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Disassemble a section of the recorded execution trace from instruction
BEGIN (inclusive) to instruction END (inclusive). */
void (*to_insn_history_range) (struct target_ops *,
ULONGEST begin, ULONGEST end, int flags)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Print a function trace of the recorded execution trace.
If SIZE < 0, print abs (SIZE) preceding functions; otherwise, print SIZE
succeeding functions. */
void (*to_call_history) (struct target_ops *, int size, int flags)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Print a function trace of the recorded execution trace starting
at function FROM.
If SIZE < 0, print abs (SIZE) functions before FROM; otherwise, print
SIZE functions after FROM. */
void (*to_call_history_from) (struct target_ops *,
ULONGEST begin, int size, int flags)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Print a function trace of an execution trace section from function BEGIN
(inclusive) to function END (inclusive). */
void (*to_call_history_range) (struct target_ops *,
ULONGEST begin, ULONGEST end, int flags)
TARGET_DEFAULT_NORETURN (tcomplain ());
/* Nonzero if TARGET_OBJECT_LIBRARIES_SVR4 may be read with a
non-empty annex. */
int (*to_augmented_libraries_svr4_read) (struct target_ops *)
TARGET_DEFAULT_RETURN (0);
/* Those unwinders are tried before any other arch unwinders. If
SELF doesn't have unwinders, it should delegate to the
"beneath" target. */
const struct frame_unwind *(*to_get_unwinder) (struct target_ops *self)
TARGET_DEFAULT_RETURN (NULL);
const struct frame_unwind *(*to_get_tailcall_unwinder) (struct target_ops *self)
TARGET_DEFAULT_RETURN (NULL);
/* Prepare to generate a core file. */
void (*to_prepare_to_generate_core) (struct target_ops *)
TARGET_DEFAULT_IGNORE ();
/* Cleanup after generating a core file. */
void (*to_done_generating_core) (struct target_ops *)
TARGET_DEFAULT_IGNORE ();
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. This routine is automatically always
called after popping the target off the target stack - the target's
own methods are no longer available through the target vector.
Closing file descriptors and freeing all memory allocated memory are
typical things it should do. */
void target_close (struct target_ops *targ);
/* Find the correct target to use for "attach". If a target on the
current stack supports attaching, then it is returned. Otherwise,
the default run target is returned. */
extern struct target_ops *find_attach_target (void);
/* Find the correct target to use for "run". If a target on the
current stack supports creating a new inferior, then it is
returned. Otherwise, the default run target is returned. */
extern struct target_ops *find_run_target (void);
/* 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) (&current_target, pid)
/* Display a message indicating we're about to detach from the current
inferior process. */
extern void target_announce_detach (int from_tty);
/* 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 (const char *, int);
/* Disconnect from the current target without resuming it (leaving it
waiting for a debugger). */
extern void target_disconnect (const char *, int);
/* Resume execution (or prepare for execution) of a target thread,
process or all processes. STEP says whether to hardware
single-step or to run free; SIGGNAL is the signal to be given to
the target, or GDB_SIGNAL_0 for no signal. The caller may not pass
GDB_SIGNAL_DEFAULT. A specific PTID means `step/resume only this
process id'. A wildcard PTID (all threads, or all threads of
process) means `step/resume INFERIOR_PTID, and let other threads
(for which the wildcard PTID matches) resume with their
'thread->suspend.stop_signal' signal (usually GDB_SIGNAL_0) if it
is in "pass" state, or with no signal if in "no pass" state.
In order to efficiently handle batches of resumption requests,
targets may implement this method such that it records the
resumption request, but defers the actual resumption to the
target_commit_resume method implementation. See
target_commit_resume below. */
extern void target_resume (ptid_t ptid, int step, enum gdb_signal signal);
/* Commit a series of resumption requests previously prepared with
target_resume calls.
GDB always calls target_commit_resume after calling target_resume
one or more times. A target may thus use this method in
coordination with the target_resume method to batch target-side
resumption requests. In that case, the target doesn't actually
resume in its target_resume implementation. Instead, it prepares
the resumption in target_resume, and defers the actual resumption
to target_commit_resume. E.g., the remote target uses this to
coalesce multiple resumption requests in a single vCont packet. */
extern void target_commit_resume ();
/* Setup to defer target_commit_resume calls, and return a cleanup
that reactivates target_commit_resume, if it was previously
active. */
struct cleanup *make_cleanup_defer_target_commit_resume ();
/* For target_read_memory see target/target.h. */
/* The default target_ops::to_wait implementation. */
extern ptid_t default_target_wait (struct target_ops *ops,
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) (&current_target, regcache)
/* Determine current address space of thread PTID. */
struct address_space *target_thread_address_space (ptid_t);
/* Implement the "info proc" command. This returns one if the request
was handled, and zero otherwise. It can also throw an exception if
an error was encountered while attempting to handle the
request. */
int target_info_proc (const char *, enum info_proc_what);
/* Returns true if this target can disable address space randomization. */
int target_supports_disable_randomization (void);
/* Returns true if this target can enable and disable tracepoints
while a trace experiment is running. */
#define target_supports_enable_disable_tracepoint() \
(*current_target.to_supports_enable_disable_tracepoint) (&current_target)
#define target_supports_string_tracing() \
(*current_target.to_supports_string_tracing) (&current_target)
/* Returns true if this target can handle breakpoint conditions
on its end. */
#define target_supports_evaluation_of_breakpoint_conditions() \
(*current_target.to_supports_evaluation_of_breakpoint_conditions) (&current_target)
/* Returns true if this target can handle breakpoint commands
on its end. */
#define target_can_run_breakpoint_commands() \
(*current_target.to_can_run_breakpoint_commands) (&current_target)
extern int target_read_string (CORE_ADDR, char **, int, int *);
/* For target_read_memory see target/target.h. */
extern int target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr,
ssize_t len);
extern int target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len);
extern int target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len);
/* For target_write_memory see target/target.h. */
extern int target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr,
ssize_t 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 *));
/* 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. Returns 0 for success, and returns non-zero or
throws an error (with a detailed failure reason error code and
message) otherwise. */
extern int target_insert_breakpoint (struct gdbarch *gdbarch,
struct bp_target_info *bp_tgt);
/* Remove a breakpoint at address BP_TGT->placed_address in the target
machine. Result is 0 for success, non-zero for error. */
extern int target_remove_breakpoint (struct gdbarch *gdbarch,
struct bp_target_info *bp_tgt,
enum remove_bp_reason reason);
/* Returns true if the terminal settings of the inferior are in
effect. */
extern int target_terminal_is_inferior (void);
/* Returns true if our terminal settings are in effect. */
extern int target_terminal_is_ours (void);
/* Initialize the terminal settings we record for the inferior,
before we actually run the inferior. */
extern void target_terminal_init (void);
/* Put the inferior's terminal settings into effect. This is
preparation for starting or resuming the inferior. This is a no-op
unless called with the main UI as current UI. */
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. This is a no-op if terminal_ours
was most recently called. This is a no-op unless called with the main
UI as current UI. */
extern void target_terminal_ours_for_output (void);
/* Put our terminal settings into effect. First record the inferior's
terminal settings so they can be restored properly later. This is
a no-op unless called with the main UI as current UI. */
extern void target_terminal_ours (void);
/* Return true if the target stack has a non-default
"to_terminal_ours" method. */
extern int target_supports_terminal_ours (void);
/* Make a cleanup that restores the state of the terminal to the current
state. */
extern struct cleanup *make_cleanup_restore_target_terminal (void);
/* Print useful information about our terminal status, if such a thing
exists. */
#define target_terminal_info(arg, from_tty) \
(*current_target.to_terminal_info) (&current_target, 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 (const char *arg, 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) (&current_target, ptid)
/* 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. They return 0 for success, 1 if the
catchpoint type is not supported and -1 for failure. */
#define target_insert_fork_catchpoint(pid) \
(*current_target.to_insert_fork_catchpoint) (&current_target, pid)
#define target_remove_fork_catchpoint(pid) \
(*current_target.to_remove_fork_catchpoint) (&current_target, pid)
#define target_insert_vfork_catchpoint(pid) \
(*current_target.to_insert_vfork_catchpoint) (&current_target, pid)
#define target_remove_vfork_catchpoint(pid) \
(*current_target.to_remove_vfork_catchpoint) (&current_target, 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, int detach_fork);
/* Handle the target-specific bookkeeping required when the inferior
makes an exec call. INF is the exec'd inferior. */
void target_follow_exec (struct inferior *inf, char *execd_pathname);
/* On some targets, we can catch an inferior exec event when it
occurs. These functions insert/remove an already-created
catchpoint for such events. They return 0 for success, 1 if the
catchpoint type is not supported and -1 for failure. */
#define target_insert_exec_catchpoint(pid) \
(*current_target.to_insert_exec_catchpoint) (&current_target, pid)
#define target_remove_exec_catchpoint(pid) \
(*current_target.to_remove_exec_catchpoint) (&current_target, 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.
Return 0 for success, 1 if syscall catchpoints are not supported or -1
for failure. */
#define target_set_syscall_catchpoint(pid, needed, any_count, table_size, table) \
(*current_target.to_set_syscall_catchpoint) (&current_target, \
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) (&current_target, \
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. */
/* For target_mourn_inferior see target/target.h. */
/* Does target have enough data to do a run or attach command? */
#define target_can_run(t) \
((t)->to_can_run) (t)
/* Set list of signals to be handled in the target.
PASS_SIGNALS is an array of size NSIG, indexed by target signal number
(enum gdb_signal). For every signal whose entry in this array is
non-zero, the target is allowed -but not required- to skip reporting
arrival of the signal to the GDB core by returning from target_wait,
and to pass the signal directly to the inferior instead.
However, if the target is hardware single-stepping a thread that is
about to receive a signal, it needs to be reported in any case, even
if mentioned in a previous target_pass_signals call. */
extern void target_pass_signals (int nsig, unsigned char *pass_signals);
/* Set list of signals the target may pass to the inferior. This
directly maps to the "handle SIGNAL pass/nopass" setting.
PROGRAM_SIGNALS is an array of size NSIG, indexed by target signal
number (enum gdb_signal). For every signal whose entry in this
array is non-zero, the target is allowed to pass the signal to the
inferior. Signals not present in the array shall be silently
discarded. This does not influence whether to pass signals to the
inferior as a result of a target_resume call. This is useful in
scenarios where the target needs to decide whether to pass or not a
signal to the inferior without GDB core involvement, such as for
example, when detaching (as threads may have been suspended with
pending signals not reported to GDB). */
extern void target_program_signals (int nsig, unsigned char *program_signals);
/* Check to see if a thread is still alive. */
extern int target_thread_alive (ptid_t ptid);
/* Sync the target's threads with GDB's thread list. */
extern void target_update_thread_list (void);
/* Make target stop in a continuable fashion. (For instance, under
Unix, this should act like SIGSTOP). Note that this function is
asynchronous: it does not wait for the target to become stopped
before returning. If this is the behavior you want please use
target_stop_and_wait. */
extern void target_stop (ptid_t ptid);
/* Interrupt the target just like the user typed a ^C on the
inferior's controlling terminal. (For instance, under Unix, this
should act like SIGINT). This function is asynchronous. */
extern void target_interrupt (ptid_t ptid);
/* Pass a ^C, as determined to have been pressed by checking the quit
flag, to the target. Normally calls target_interrupt, but remote
targets may take the opportunity to detect the remote side is not
responding and offer to disconnect. */
extern void target_pass_ctrlc (void);
/* The default target_ops::to_pass_ctrlc implementation. Simply calls
target_interrupt. */
extern void default_target_pass_ctrlc (struct target_ops *ops);
/* 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) (&current_target, 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 to_create_inferior or
to_attach. */
extern int target_has_execution_1 (ptid_t);
/* Like target_has_execution_1, but always passes inferior_ptid. */
extern int target_has_execution_current (void);
#define target_has_execution target_has_execution_current ()
/* 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,
ptid_t the_ptid);
/* 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)
/* Controls whether async mode is permitted. */
extern int target_async_permitted;
/* Can the target support asynchronous execution? */
#define target_can_async_p() (current_target.to_can_async_p (&current_target))
/* Is the target in asynchronous execution mode? */
#define target_is_async_p() (current_target.to_is_async_p (&current_target))
/* Enables/disabled async target events. */
extern void target_async (int enable);
/* Enables/disables thread create and exit events. */
extern void target_thread_events (int enable);
/* Whether support for controlling the target backends always in
non-stop mode is enabled. */
extern enum auto_boolean target_non_stop_enabled;
/* Is the target in non-stop mode? Some targets control the inferior
in non-stop mode even with "set non-stop off". Always true if "set
non-stop" is on. */
extern int target_is_non_stop_p (void);
#define target_execution_direction() \
(current_target.to_execution_direction (&current_target))
/* 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 (&current_target, TP))
/* Return the thread's name, or NULL if the target is unable to determine it.
The returned value must not be freed by the caller. */
extern const char *target_thread_name (struct thread_info *);
/* 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) (&current_target, 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) (&current_target, FUNC, DATA)
/*
* Compose corefile .note section.
*/
#define target_make_corefile_notes(BFD, SIZE_P) \
(current_target.to_make_corefile_notes) (&current_target, BFD, SIZE_P)
/* Bookmark interfaces. */
#define target_get_bookmark(ARGS, FROM_TTY) \
(current_target.to_get_bookmark) (&current_target, ARGS, FROM_TTY)
#define target_goto_bookmark(ARG, FROM_TTY) \
(current_target.to_goto_bookmark) (&current_target, 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) (&current_target))
/* Returns non-zero if the target stopped because it executed a
software breakpoint instruction. */
#define target_stopped_by_sw_breakpoint() \
((*current_target.to_stopped_by_sw_breakpoint) (&current_target))
#define target_supports_stopped_by_sw_breakpoint() \
((*current_target.to_supports_stopped_by_sw_breakpoint) (&current_target))
#define target_stopped_by_hw_breakpoint() \
((*current_target.to_stopped_by_hw_breakpoint) (&current_target))
#define target_supports_stopped_by_hw_breakpoint() \
((*current_target.to_supports_stopped_by_hw_breakpoint) (&current_target))
/* 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 positive if we can set a hardware watchpoint of type TYPE.
Returns negative if the target doesn't have enough hardware debug
registers available. Return zero if hardware watchpoint of type
TYPE isn't supported. 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 the number of watchpoints of other types than
this one used so far. */
#define target_can_use_hardware_watchpoint(TYPE,CNT,OTHERTYPE) \
(*current_target.to_can_use_hw_breakpoint) (&current_target, \
TYPE, CNT, OTHERTYPE)
/* Returns the number of debug registers needed to watch the given
memory region, or zero if not supported. */
#define target_region_ok_for_hw_watchpoint(addr, len) \
(*current_target.to_region_ok_for_hw_watchpoint) (&current_target, \
addr, len)
#define target_can_do_single_step() \
(*current_target.to_can_do_single_step) (&current_target)
/* 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.
COND is the expression for its condition, or NULL if there's none.
Returns 0 for success, 1 if the watchpoint type is not supported,
-1 for failure. */
#define target_insert_watchpoint(addr, len, type, cond) \
(*current_target.to_insert_watchpoint) (&current_target, \
addr, len, type, cond)
#define target_remove_watchpoint(addr, len, type, cond) \
(*current_target.to_remove_watchpoint) (&current_target, \
addr, len, type, cond)
/* Insert a new masked watchpoint at ADDR using the mask MASK.
RW may be hw_read for a read watchpoint, hw_write for a write watchpoint
or hw_access for an access watchpoint. Returns 0 for success, 1 if
masked watchpoints are not supported, -1 for failure. */
extern int target_insert_mask_watchpoint (CORE_ADDR, CORE_ADDR,
enum target_hw_bp_type);
/* Remove a masked watchpoint at ADDR with the mask MASK.
RW may be hw_read for a read watchpoint, hw_write for a write watchpoint
or hw_access for an access watchpoint. Returns 0 for success, non-zero
for failure. */
extern int target_remove_mask_watchpoint (CORE_ADDR, CORE_ADDR,
enum target_hw_bp_type);
/* Insert a hardware breakpoint at address BP_TGT->placed_address in
the target machine. Returns 0 for success, and returns non-zero or
throws an error (with a detailed failure reason error code and
message) otherwise. */
#define target_insert_hw_breakpoint(gdbarch, bp_tgt) \
(*current_target.to_insert_hw_breakpoint) (&current_target, \
gdbarch, bp_tgt)
#define target_remove_hw_breakpoint(gdbarch, bp_tgt) \
(*current_target.to_remove_hw_breakpoint) (&current_target, \
gdbarch, bp_tgt)
/* Return number of debug registers needed for a ranged breakpoint,
or -1 if ranged breakpoints are not supported. */
extern int target_ranged_break_num_registers (void);
/* 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)
/* Return non-zero if ADDR is within the range of a watchpoint spanning
LENGTH bytes beginning at START. */
#define target_watchpoint_addr_within_range(target, addr, start, length) \
(*(target)->to_watchpoint_addr_within_range) (target, addr, start, length)
/* Return non-zero if the target is capable of using hardware to evaluate
the condition expression. In this case, if the condition is false when
the watched memory location changes, execution may continue without the
debugger being notified.
Due to limitations in the hardware implementation, it may be capable of
avoiding triggering the watchpoint in some cases where the condition
expression is false, but may report some false positives as well.
For this reason, GDB will still evaluate the condition expression when
the watchpoint triggers. */
#define target_can_accel_watchpoint_condition(addr, len, type, cond) \
(*current_target.to_can_accel_watchpoint_condition) (&current_target, \
addr, len, type, cond)
/* Return number of debug registers needed for a masked watchpoint,
-1 if masked watchpoints are not supported or -2 if the given address
and mask combination cannot be used. */
extern int target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask);
/* Target can execute in reverse? */
#define target_can_execute_reverse \
current_target.to_can_execute_reverse (&current_target)
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) (&current_target, 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);
/* Target file operations. */
/* Return nonzero if the filesystem seen by the current inferior
is the local filesystem, zero otherwise. */
#define target_filesystem_is_local() \
current_target.to_filesystem_is_local (&current_target)
/* Open FILENAME on the target, in the filesystem as seen by INF,
using FLAGS and MODE. If INF is NULL, use the filesystem seen
by the debugger (GDB or, for remote targets, the remote stub).
Return a target file descriptor, or -1 if an error occurs (and
set *TARGET_ERRNO). */
extern int target_fileio_open (struct inferior *inf,
const char *filename, int flags,
int mode, int *target_errno);
/* Like target_fileio_open, but print a warning message if the
file is being accessed over a link that may be slow. */
extern int target_fileio_open_warn_if_slow (struct inferior *inf,
const char *filename,
int flags,
int mode,
int *target_errno);
/* Write up to LEN bytes from WRITE_BUF to FD on the target.
Return the number of bytes written, or -1 if an error occurs
(and set *TARGET_ERRNO). */
extern int target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len,
ULONGEST offset, int *target_errno);
/* Read up to LEN bytes FD on the target into READ_BUF.
Return the number of bytes read, or -1 if an error occurs
(and set *TARGET_ERRNO). */
extern int target_fileio_pread (int fd, gdb_byte *read_buf, int len,
ULONGEST offset, int *target_errno);
/* Get information about the file opened as FD on the target
and put it in SB. Return 0 on success, or -1 if an error
occurs (and set *TARGET_ERRNO). */
extern int target_fileio_fstat (int fd, struct stat *sb,
int *target_errno);
/* Close FD on the target. Return 0, or -1 if an error occurs
(and set *TARGET_ERRNO). */
extern int target_fileio_close (int fd, int *target_errno);
/* Unlink FILENAME on the target, in the filesystem as seen by INF.
If INF is NULL, use the filesystem seen by the debugger (GDB or,
for remote targets, the remote stub). Return 0, or -1 if an error
occurs (and set *TARGET_ERRNO). */
extern int target_fileio_unlink (struct inferior *inf,
const char *filename,
int *target_errno);
/* Read value of symbolic link FILENAME on the target, in the
filesystem as seen by INF. If INF is NULL, use the filesystem seen
by the debugger (GDB or, for remote targets, the remote stub).
Return a null-terminated string allocated via xmalloc, or NULL if
an error occurs (and set *TARGET_ERRNO). */
extern char *target_fileio_readlink (struct inferior *inf,
const char *filename,
int *target_errno);
/* Read target file FILENAME, in the filesystem as seen by INF. If
INF is NULL, use the filesystem seen by the debugger (GDB or, for
remote targets, the remote stub). 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. */
extern LONGEST target_fileio_read_alloc (struct inferior *inf,
const char *filename,
gdb_byte **buf_p);
/* Read target file FILENAME, in the filesystem as seen by INF. If
INF is NULL, use the filesystem seen by the debugger (GDB or, for
remote targets, the remote stub). 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_fileio_read_stralloc (struct inferior *inf,
const char *filename);
/* Tracepoint-related operations. */
#define target_trace_init() \
(*current_target.to_trace_init) (&current_target)
#define target_download_tracepoint(t) \
(*current_target.to_download_tracepoint) (&current_target, t)
#define target_can_download_tracepoint() \
(*current_target.to_can_download_tracepoint) (&current_target)
#define target_download_trace_state_variable(tsv) \
(*current_target.to_download_trace_state_variable) (&current_target, tsv)
#define target_enable_tracepoint(loc) \
(*current_target.to_enable_tracepoint) (&current_target, loc)
#define target_disable_tracepoint(loc) \
(*current_target.to_disable_tracepoint) (&current_target, loc)
#define target_trace_start() \
(*current_target.to_trace_start) (&current_target)
#define target_trace_set_readonly_regions() \
(*current_target.to_trace_set_readonly_regions) (&current_target)
#define target_get_trace_status(ts) \
(*current_target.to_get_trace_status) (&current_target, ts)
#define target_get_tracepoint_status(tp,utp) \
(*current_target.to_get_tracepoint_status) (&current_target, tp, utp)
#define target_trace_stop() \
(*current_target.to_trace_stop) (&current_target)
#define target_trace_find(type,num,addr1,addr2,tpp) \
(*current_target.to_trace_find) (&current_target, \
(type), (num), (addr1), (addr2), (tpp))
#define target_get_trace_state_variable_value(tsv,val) \
(*current_target.to_get_trace_state_variable_value) (&current_target, \
(tsv), (val))
#define target_save_trace_data(filename) \
(*current_target.to_save_trace_data) (&current_target, filename)
#define target_upload_tracepoints(utpp) \
(*current_target.to_upload_tracepoints) (&current_target, utpp)
#define target_upload_trace_state_variables(utsvp) \
(*current_target.to_upload_trace_state_variables) (&current_target, utsvp)
#define target_get_raw_trace_data(buf,offset,len) \
(*current_target.to_get_raw_trace_data) (&current_target, \
(buf), (offset), (len))
#define target_get_min_fast_tracepoint_insn_len() \
(*current_target.to_get_min_fast_tracepoint_insn_len) (&current_target)
#define target_set_disconnected_tracing(val) \
(*current_target.to_set_disconnected_tracing) (&current_target, val)
#define target_set_circular_trace_buffer(val) \
(*current_target.to_set_circular_trace_buffer) (&current_target, val)
#define target_set_trace_buffer_size(val) \
(*current_target.to_set_trace_buffer_size) (&current_target, val)
#define target_set_trace_notes(user,notes,stopnotes) \
(*current_target.to_set_trace_notes) (&current_target, \
(user), (notes), (stopnotes))
#define target_get_tib_address(ptid, addr) \
(*current_target.to_get_tib_address) (&current_target, (ptid), (addr))
#define target_set_permissions() \
(*current_target.to_set_permissions) (&current_target)
#define target_static_tracepoint_marker_at(addr, marker) \
(*current_target.to_static_tracepoint_marker_at) (&current_target, \
addr, marker)
#define target_static_tracepoint_markers_by_strid(marker_id) \
(*current_target.to_static_tracepoint_markers_by_strid) (&current_target, \
marker_id)
#define target_traceframe_info() \
(*current_target.to_traceframe_info) (&current_target)
#define target_use_agent(use) \
(*current_target.to_use_agent) (&current_target, use)
#define target_can_use_agent() \
(*current_target.to_can_use_agent) (&current_target)
#define target_augmented_libraries_svr4_read() \
(*current_target.to_augmented_libraries_svr4_read) (&current_target)
/* Command logging facility. */
#define target_log_command(p) \
(*current_target.to_log_command) (&current_target, p)
extern int target_core_of_thread (ptid_t ptid);
/* See to_get_unwinder in struct target_ops. */
extern const struct frame_unwind *target_get_unwinder (void);
/* See to_get_tailcall_unwinder in struct target_ops. */
extern const struct frame_unwind *target_get_tailcall_unwinder (void);
/* This implements basic memory verification, reading target memory
and performing the comparison here (as opposed to accelerated
verification making use of the qCRC packet, for example). */
extern int simple_verify_memory (struct target_ops* ops,
const gdb_byte *data,
CORE_ADDR memaddr, ULONGEST size);
/* Verify that the memory in the [MEMADDR, MEMADDR+SIZE) range matches
the contents of [DATA,DATA+SIZE). Returns 1 if there's a match, 0
if there's a mismatch, and -1 if an error is encountered while
reading memory. Throws an error if the functionality is found not
to be supported by the current target. */
int target_verify_memory (const gdb_byte *data,
CORE_ADDR memaddr, ULONGEST size);
/* Routines for maintenance of the target structures...
complete_target_initialization: Finalize a target_ops by filling in
any fields needed by the target implementation. Unnecessary for
targets which are registered via add_target, as this part gets
taken care of then.
add_target: Add a target to the list of all possible targets.
This only makes sense for targets that should be activated using
the "target TARGET_NAME ..." command.
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. */
extern void add_target (struct target_ops *);
extern void add_target_with_completer (struct target_ops *t,
completer_ftype *completer);
extern void complete_target_initialization (struct target_ops *t);
/* Adds a command ALIAS for target T and marks it deprecated. This is useful
for maintaining backwards compatibility when renaming targets. */
extern void add_deprecated_target_alias (struct target_ops *t, char *alias);
extern void push_target (struct target_ops *);
extern int unpush_target (struct target_ops *);
extern void target_pre_inferior (int);
extern void target_preopen (int);
/* Does whatever cleanup is required to get rid of all pushed targets. */
extern void pop_all_targets (void);
/* Like pop_all_targets, but pops only targets whose stratum is at or
above STRATUM. */
extern void pop_all_targets_at_and_above (enum strata stratum);
/* 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);
extern int target_is_pushed (struct target_ops *t);
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;
/* The "owner" of the section.
It can be any unique value. It is set by add_target_sections
and used by remove_target_sections.
For example, for executables it is a pointer to exec_bfd and
for shlibs it is the so_list pointer. */
void *owner;
};
/* 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 target_ops *, struct gdbarch *,
struct bp_target_info *,
enum remove_bp_reason);
extern int memory_insert_breakpoint (struct target_ops *, struct gdbarch *,
struct bp_target_info *);
/* Check whether the memory at the breakpoint's placed address still
contains the expected breakpoint instruction. */
extern int memory_validate_breakpoint (struct gdbarch *gdbarch,
struct bp_target_info *bp_tgt);
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 void noprocess (void) ATTRIBUTE_NORETURN;
extern void target_require_runnable (void);
extern struct target_ops *find_target_beneath (struct target_ops *);
/* Find the target at STRATUM. If no target is at that stratum,
return NULL. */
struct target_ops *find_target_at (enum strata stratum);
/* 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;
/* Parity for serial port */
extern int serial_parity;
/* Timeout limit for response from target. */
extern int remote_timeout;
/* 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);
extern int may_write_registers;
extern int may_write_memory;
extern int may_insert_breakpoints;
extern int may_insert_tracepoints;
extern int may_insert_fast_tracepoints;
extern int may_stop;
extern void update_target_permissions (void);
/* Imported from machine dependent code. */
/* See to_supports_btrace in struct target_ops. */
extern int target_supports_btrace (enum btrace_format);
/* See to_enable_btrace in struct target_ops. */
extern struct btrace_target_info *
target_enable_btrace (ptid_t ptid, const struct btrace_config *);
/* See to_disable_btrace in struct target_ops. */
extern void target_disable_btrace (struct btrace_target_info *btinfo);
/* See to_teardown_btrace in struct target_ops. */
extern void target_teardown_btrace (struct btrace_target_info *btinfo);
/* See to_read_btrace in struct target_ops. */
extern enum btrace_error target_read_btrace (struct btrace_data *,
struct btrace_target_info *,
enum btrace_read_type);
/* See to_btrace_conf in struct target_ops. */
extern const struct btrace_config *
target_btrace_conf (const struct btrace_target_info *);
/* See to_stop_recording in struct target_ops. */
extern void target_stop_recording (void);
/* See to_save_record in struct target_ops. */
extern void target_save_record (const char *filename);
/* Query if the target supports deleting the execution log. */
extern int target_supports_delete_record (void);
/* See to_delete_record in struct target_ops. */
extern void target_delete_record (void);
/* See to_record_is_replaying in struct target_ops. */
extern int target_record_is_replaying (ptid_t ptid);
/* See to_record_will_replay in struct target_ops. */
extern int target_record_will_replay (ptid_t ptid, int dir);
/* See to_record_stop_replaying in struct target_ops. */
extern void target_record_stop_replaying (void);
/* See to_goto_record_begin in struct target_ops. */
extern void target_goto_record_begin (void);
/* See to_goto_record_end in struct target_ops. */
extern void target_goto_record_end (void);
/* See to_goto_record in struct target_ops. */
extern void target_goto_record (ULONGEST insn);
/* See to_insn_history. */
extern void target_insn_history (int size, int flags);
/* See to_insn_history_from. */
extern void target_insn_history_from (ULONGEST from, int size, int flags);
/* See to_insn_history_range. */
extern void target_insn_history_range (ULONGEST begin, ULONGEST end, int flags);
/* See to_call_history. */
extern void target_call_history (int size, int flags);
/* See to_call_history_from. */
extern void target_call_history_from (ULONGEST begin, int size, int flags);
/* See to_call_history_range. */
extern void target_call_history_range (ULONGEST begin, ULONGEST end, int flags);
/* See to_prepare_to_generate_core. */
extern void target_prepare_to_generate_core (void);
/* See to_done_generating_core. */
extern void target_done_generating_core (void);
#endif /* !defined (TARGET_H) */
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