547 lines
17 KiB
C
547 lines
17 KiB
C
/* Target operations for the remote server for GDB.
|
|
Copyright (C) 2002-2005, 2007-2012 Free Software Foundation, Inc.
|
|
|
|
Contributed by MontaVista Software.
|
|
|
|
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/>. */
|
|
|
|
#ifndef TARGET_H
|
|
#define TARGET_H
|
|
|
|
struct emit_ops;
|
|
|
|
/* Ways to "resume" a thread. */
|
|
|
|
enum resume_kind
|
|
{
|
|
/* Thread should continue. */
|
|
resume_continue,
|
|
|
|
/* Thread should single-step. */
|
|
resume_step,
|
|
|
|
/* Thread should be stopped. */
|
|
resume_stop
|
|
};
|
|
|
|
/* This structure describes how to resume a particular thread (or all
|
|
threads) based on the client's request. If thread is -1, then this
|
|
entry applies to all threads. These are passed around as an
|
|
array. */
|
|
|
|
struct thread_resume
|
|
{
|
|
ptid_t thread;
|
|
|
|
/* How to "resume". */
|
|
enum resume_kind kind;
|
|
|
|
/* If non-zero, send this signal when we resume, or to stop the
|
|
thread. If stopping a thread, and this is 0, the target should
|
|
stop the thread however it best decides to (e.g., SIGSTOP on
|
|
linux; SuspendThread on win32). This is a host signal value (not
|
|
enum target_signal). */
|
|
int sig;
|
|
};
|
|
|
|
/* Generally, what has the program done? */
|
|
enum target_waitkind
|
|
{
|
|
/* The program has exited. The exit status is in
|
|
value.integer. */
|
|
TARGET_WAITKIND_EXITED,
|
|
|
|
/* The program has stopped with a signal. Which signal is in
|
|
value.sig. */
|
|
TARGET_WAITKIND_STOPPED,
|
|
|
|
/* The program has terminated with a signal. Which signal is in
|
|
value.sig. */
|
|
TARGET_WAITKIND_SIGNALLED,
|
|
|
|
/* The program is letting us know that it dynamically loaded
|
|
something. */
|
|
TARGET_WAITKIND_LOADED,
|
|
|
|
/* The program has exec'ed a new executable file. The new file's
|
|
pathname is pointed to by value.execd_pathname. */
|
|
TARGET_WAITKIND_EXECD,
|
|
|
|
/* Nothing of interest to GDB happened, but we stopped anyway. */
|
|
TARGET_WAITKIND_SPURIOUS,
|
|
|
|
/* An event has occurred, but we should wait again. In this case,
|
|
we want to go back to the event loop and wait there for another
|
|
event from the inferior. */
|
|
TARGET_WAITKIND_IGNORE
|
|
};
|
|
|
|
struct target_waitstatus
|
|
{
|
|
enum target_waitkind kind;
|
|
|
|
/* Forked child pid, execd pathname, exit status or signal number. */
|
|
union
|
|
{
|
|
int integer;
|
|
enum target_signal sig;
|
|
ptid_t related_pid;
|
|
char *execd_pathname;
|
|
}
|
|
value;
|
|
};
|
|
|
|
/* Options that can be passed to target_ops->wait. */
|
|
|
|
#define TARGET_WNOHANG 1
|
|
|
|
struct target_ops
|
|
{
|
|
/* Start a new process.
|
|
|
|
PROGRAM is a path to the program to execute.
|
|
ARGS is a standard NULL-terminated array of arguments,
|
|
to be passed to the inferior as ``argv''.
|
|
|
|
Returns the new PID on success, -1 on failure. Registers the new
|
|
process with the process list. */
|
|
|
|
int (*create_inferior) (char *program, char **args);
|
|
|
|
/* Attach to a running process.
|
|
|
|
PID is the process ID to attach to, specified by the user
|
|
or a higher layer.
|
|
|
|
Returns -1 if attaching is unsupported, 0 on success, and calls
|
|
error() otherwise. */
|
|
|
|
int (*attach) (unsigned long pid);
|
|
|
|
/* Kill inferior PID. Return -1 on failure, and 0 on success. */
|
|
|
|
int (*kill) (int pid);
|
|
|
|
/* Detach from inferior PID. Return -1 on failure, and 0 on
|
|
success. */
|
|
|
|
int (*detach) (int pid);
|
|
|
|
/* The inferior process has died. Do what is right. */
|
|
|
|
void (*mourn) (struct process_info *proc);
|
|
|
|
/* Wait for inferior PID to exit. */
|
|
void (*join) (int pid);
|
|
|
|
/* Return 1 iff the thread with process ID PID is alive. */
|
|
|
|
int (*thread_alive) (ptid_t pid);
|
|
|
|
/* Resume the inferior process. */
|
|
|
|
void (*resume) (struct thread_resume *resume_info, size_t n);
|
|
|
|
/* Wait for the inferior process or thread to change state. Store
|
|
status through argument pointer STATUS.
|
|
|
|
PTID = -1 to wait for any pid to do something, PTID(pid,0,0) to
|
|
wait for any thread of process pid to do something. Return ptid
|
|
of child, or -1 in case of error; store status through argument
|
|
pointer STATUS. OPTIONS is a bit set of options defined as
|
|
TARGET_W* above. If options contains TARGET_WNOHANG and there's
|
|
no child stop to report, return is
|
|
null_ptid/TARGET_WAITKIND_IGNORE. */
|
|
|
|
ptid_t (*wait) (ptid_t ptid, struct target_waitstatus *status, int options);
|
|
|
|
/* Fetch registers from the inferior process.
|
|
|
|
If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO. */
|
|
|
|
void (*fetch_registers) (struct regcache *regcache, int regno);
|
|
|
|
/* Store registers to the inferior process.
|
|
|
|
If REGNO is -1, store all registers; otherwise, store at least REGNO. */
|
|
|
|
void (*store_registers) (struct regcache *regcache, int regno);
|
|
|
|
/* Prepare to read or write memory from the inferior process.
|
|
Targets use this to do what is necessary to get the state of the
|
|
inferior such that it is possible to access memory.
|
|
|
|
This should generally only be called from client facing routines,
|
|
such as gdb_read_memory/gdb_write_memory, or the insert_point
|
|
callbacks.
|
|
|
|
Like `read_memory' and `write_memory' below, returns 0 on success
|
|
and errno on failure. */
|
|
|
|
int (*prepare_to_access_memory) (void);
|
|
|
|
/* Undo the effects of prepare_to_access_memory. */
|
|
|
|
void (*done_accessing_memory) (void);
|
|
|
|
/* Read memory from the inferior process. This should generally be
|
|
called through read_inferior_memory, which handles breakpoint shadowing.
|
|
|
|
Read LEN bytes at MEMADDR into a buffer at MYADDR.
|
|
|
|
Returns 0 on success and errno on failure. */
|
|
|
|
int (*read_memory) (CORE_ADDR memaddr, unsigned char *myaddr, int len);
|
|
|
|
/* Write memory to the inferior process. This should generally be
|
|
called through write_inferior_memory, which handles breakpoint shadowing.
|
|
|
|
Write LEN bytes from the buffer at MYADDR to MEMADDR.
|
|
|
|
Returns 0 on success and errno on failure. */
|
|
|
|
int (*write_memory) (CORE_ADDR memaddr, const unsigned char *myaddr,
|
|
int len);
|
|
|
|
/* Query GDB for the values of any symbols we're interested in.
|
|
This function is called whenever we receive a "qSymbols::"
|
|
query, which corresponds to every time more symbols (might)
|
|
become available. NULL if we aren't interested in any
|
|
symbols. */
|
|
|
|
void (*look_up_symbols) (void);
|
|
|
|
/* Send an interrupt request to the inferior process,
|
|
however is appropriate. */
|
|
|
|
void (*request_interrupt) (void);
|
|
|
|
/* Read auxiliary vector data from the inferior process.
|
|
|
|
Read LEN bytes at OFFSET into a buffer at MYADDR. */
|
|
|
|
int (*read_auxv) (CORE_ADDR offset, unsigned char *myaddr,
|
|
unsigned int len);
|
|
|
|
/* Insert and remove a break or watchpoint.
|
|
Returns 0 on success, -1 on failure and 1 on unsupported.
|
|
The type is coded as follows:
|
|
'0' - software-breakpoint
|
|
'1' - hardware-breakpoint
|
|
'2' - write watchpoint
|
|
'3' - read watchpoint
|
|
'4' - access watchpoint */
|
|
|
|
int (*insert_point) (char type, CORE_ADDR addr, int len);
|
|
int (*remove_point) (char type, CORE_ADDR addr, int len);
|
|
|
|
/* Returns 1 if target was stopped due to a watchpoint hit, 0 otherwise. */
|
|
|
|
int (*stopped_by_watchpoint) (void);
|
|
|
|
/* Returns the address associated with the watchpoint that hit, if any;
|
|
returns 0 otherwise. */
|
|
|
|
CORE_ADDR (*stopped_data_address) (void);
|
|
|
|
/* Reports the text, data offsets of the executable. This is
|
|
needed for uclinux where the executable is relocated during load
|
|
time. */
|
|
|
|
int (*read_offsets) (CORE_ADDR *text, CORE_ADDR *data);
|
|
|
|
/* Fetch the address associated with a specific thread local storage
|
|
area, determined by the specified THREAD, OFFSET, and LOAD_MODULE.
|
|
Stores it in *ADDRESS and returns zero on success; otherwise returns
|
|
an error code. A return value of -1 means this system does not
|
|
support the operation. */
|
|
|
|
int (*get_tls_address) (struct thread_info *thread, CORE_ADDR offset,
|
|
CORE_ADDR load_module, CORE_ADDR *address);
|
|
|
|
/* Read/Write from/to spufs using qXfer packets. */
|
|
int (*qxfer_spu) (const char *annex, unsigned char *readbuf,
|
|
unsigned const char *writebuf, CORE_ADDR offset, int len);
|
|
|
|
/* Fill BUF with an hostio error packet representing the last hostio
|
|
error. */
|
|
void (*hostio_last_error) (char *buf);
|
|
|
|
/* Read/Write OS data using qXfer packets. */
|
|
int (*qxfer_osdata) (const char *annex, unsigned char *readbuf,
|
|
unsigned const char *writebuf, CORE_ADDR offset,
|
|
int len);
|
|
|
|
/* Read/Write extra signal info. */
|
|
int (*qxfer_siginfo) (const char *annex, unsigned char *readbuf,
|
|
unsigned const char *writebuf,
|
|
CORE_ADDR offset, int len);
|
|
|
|
int (*supports_non_stop) (void);
|
|
|
|
/* Enables async target events. Returns the previous enable
|
|
state. */
|
|
int (*async) (int enable);
|
|
|
|
/* Switch to non-stop (1) or all-stop (0) mode. Return 0 on
|
|
success, -1 otherwise. */
|
|
int (*start_non_stop) (int);
|
|
|
|
/* Returns true if the target supports multi-process debugging. */
|
|
int (*supports_multi_process) (void);
|
|
|
|
/* If not NULL, target-specific routine to process monitor command.
|
|
Returns 1 if handled, or 0 to perform default processing. */
|
|
int (*handle_monitor_command) (char *);
|
|
|
|
/* Returns the core given a thread, or -1 if not known. */
|
|
int (*core_of_thread) (ptid_t);
|
|
|
|
/* Read loadmaps. Read LEN bytes at OFFSET into a buffer at MYADDR. */
|
|
int (*read_loadmap) (const char *annex, CORE_ADDR offset,
|
|
unsigned char *myaddr, unsigned int len);
|
|
|
|
/* Target specific qSupported support. */
|
|
void (*process_qsupported) (const char *);
|
|
|
|
/* Return 1 if the target supports tracepoints, 0 (or leave the
|
|
callback NULL) otherwise. */
|
|
int (*supports_tracepoints) (void);
|
|
|
|
/* Read PC from REGCACHE. */
|
|
CORE_ADDR (*read_pc) (struct regcache *regcache);
|
|
|
|
/* Write PC to REGCACHE. */
|
|
void (*write_pc) (struct regcache *regcache, CORE_ADDR pc);
|
|
|
|
/* Return true if THREAD is known to be stopped now. */
|
|
int (*thread_stopped) (struct thread_info *thread);
|
|
|
|
/* Read Thread Information Block address. */
|
|
int (*get_tib_address) (ptid_t ptid, CORE_ADDR *address);
|
|
|
|
/* Pause all threads. If FREEZE, arrange for any resume attempt to
|
|
be ignored until an unpause_all call unfreezes threads again.
|
|
There can be nested calls to pause_all, so a freeze counter
|
|
should be maintained. */
|
|
void (*pause_all) (int freeze);
|
|
|
|
/* Unpause all threads. Threads that hadn't been resumed by the
|
|
client should be left stopped. Basically a pause/unpause call
|
|
pair should not end up resuming threads that were stopped before
|
|
the pause call. */
|
|
void (*unpause_all) (int unfreeze);
|
|
|
|
/* Cancel all pending breakpoints hits in all threads. */
|
|
void (*cancel_breakpoints) (void);
|
|
|
|
/* Stabilize all threads. That is, force them out of jump pads. */
|
|
void (*stabilize_threads) (void);
|
|
|
|
/* Install a fast tracepoint jump pad. TPOINT is the address of the
|
|
tracepoint internal object as used by the IPA agent. TPADDR is
|
|
the address of tracepoint. COLLECTOR is address of the function
|
|
the jump pad redirects to. LOCKADDR is the address of the jump
|
|
pad lock object. ORIG_SIZE is the size in bytes of the
|
|
instruction at TPADDR. JUMP_ENTRY points to the address of the
|
|
jump pad entry, and on return holds the address past the end of
|
|
the created jump pad. If a trampoline is created by the function,
|
|
then TRAMPOLINE and TRAMPOLINE_SIZE return the address and size of
|
|
the trampoline, else they remain unchanged. JJUMP_PAD_INSN is a
|
|
buffer containing a copy of the instruction at TPADDR.
|
|
ADJUST_INSN_ADDR and ADJUST_INSN_ADDR_END are output parameters that
|
|
return the address range where the instruction at TPADDR was relocated
|
|
to. If an error occurs, the ERR may be used to pass on an error
|
|
message. */
|
|
int (*install_fast_tracepoint_jump_pad) (CORE_ADDR tpoint, CORE_ADDR tpaddr,
|
|
CORE_ADDR collector,
|
|
CORE_ADDR lockaddr,
|
|
ULONGEST orig_size,
|
|
CORE_ADDR *jump_entry,
|
|
CORE_ADDR *trampoline,
|
|
ULONGEST *trampoline_size,
|
|
unsigned char *jjump_pad_insn,
|
|
ULONGEST *jjump_pad_insn_size,
|
|
CORE_ADDR *adjusted_insn_addr,
|
|
CORE_ADDR *adjusted_insn_addr_end,
|
|
char *err);
|
|
|
|
/* Return the bytecode operations vector for the current inferior.
|
|
Returns NULL if bytecode compilation is not supported. */
|
|
struct emit_ops *(*emit_ops) (void);
|
|
|
|
/* Returns true if the target supports disabling randomization. */
|
|
int (*supports_disable_randomization) (void);
|
|
|
|
/* Return the minimum length of an instruction that can be safely overwritten
|
|
for use as a fast tracepoint. */
|
|
int (*get_min_fast_tracepoint_insn_len) (void);
|
|
|
|
/* Read solib info on SVR4 platforms. */
|
|
int (*qxfer_libraries_svr4) (const char *annex, unsigned char *readbuf,
|
|
unsigned const char *writebuf,
|
|
CORE_ADDR offset, int len);
|
|
};
|
|
|
|
extern struct target_ops *the_target;
|
|
|
|
void set_target_ops (struct target_ops *);
|
|
|
|
#define create_inferior(program, args) \
|
|
(*the_target->create_inferior) (program, args)
|
|
|
|
#define myattach(pid) \
|
|
(*the_target->attach) (pid)
|
|
|
|
#define kill_inferior(pid) \
|
|
(*the_target->kill) (pid)
|
|
|
|
#define detach_inferior(pid) \
|
|
(*the_target->detach) (pid)
|
|
|
|
#define mourn_inferior(PROC) \
|
|
(*the_target->mourn) (PROC)
|
|
|
|
#define mythread_alive(pid) \
|
|
(*the_target->thread_alive) (pid)
|
|
|
|
#define fetch_inferior_registers(regcache, regno) \
|
|
(*the_target->fetch_registers) (regcache, regno)
|
|
|
|
#define store_inferior_registers(regcache, regno) \
|
|
(*the_target->store_registers) (regcache, regno)
|
|
|
|
#define join_inferior(pid) \
|
|
(*the_target->join) (pid)
|
|
|
|
#define target_supports_non_stop() \
|
|
(the_target->supports_non_stop ? (*the_target->supports_non_stop ) () : 0)
|
|
|
|
#define target_async(enable) \
|
|
(the_target->async ? (*the_target->async) (enable) : 0)
|
|
|
|
#define target_supports_multi_process() \
|
|
(the_target->supports_multi_process ? \
|
|
(*the_target->supports_multi_process) () : 0)
|
|
|
|
#define target_process_qsupported(query) \
|
|
do \
|
|
{ \
|
|
if (the_target->process_qsupported) \
|
|
the_target->process_qsupported (query); \
|
|
} while (0)
|
|
|
|
#define target_supports_tracepoints() \
|
|
(the_target->supports_tracepoints \
|
|
? (*the_target->supports_tracepoints) () : 0)
|
|
|
|
#define target_supports_fast_tracepoints() \
|
|
(the_target->install_fast_tracepoint_jump_pad != NULL)
|
|
|
|
#define target_get_min_fast_tracepoint_insn_len() \
|
|
(the_target->get_min_fast_tracepoint_insn_len \
|
|
? (*the_target->get_min_fast_tracepoint_insn_len) () : 0)
|
|
|
|
#define thread_stopped(thread) \
|
|
(*the_target->thread_stopped) (thread)
|
|
|
|
#define pause_all(freeze) \
|
|
do \
|
|
{ \
|
|
if (the_target->pause_all) \
|
|
(*the_target->pause_all) (freeze); \
|
|
} while (0)
|
|
|
|
#define unpause_all(unfreeze) \
|
|
do \
|
|
{ \
|
|
if (the_target->unpause_all) \
|
|
(*the_target->unpause_all) (unfreeze); \
|
|
} while (0)
|
|
|
|
#define cancel_breakpoints() \
|
|
do \
|
|
{ \
|
|
if (the_target->cancel_breakpoints) \
|
|
(*the_target->cancel_breakpoints) (); \
|
|
} while (0)
|
|
|
|
#define stabilize_threads() \
|
|
do \
|
|
{ \
|
|
if (the_target->stabilize_threads) \
|
|
(*the_target->stabilize_threads) (); \
|
|
} while (0)
|
|
|
|
#define install_fast_tracepoint_jump_pad(tpoint, tpaddr, \
|
|
collector, lockaddr, \
|
|
orig_size, \
|
|
jump_entry, \
|
|
trampoline, trampoline_size, \
|
|
jjump_pad_insn, \
|
|
jjump_pad_insn_size, \
|
|
adjusted_insn_addr, \
|
|
adjusted_insn_addr_end, \
|
|
err) \
|
|
(*the_target->install_fast_tracepoint_jump_pad) (tpoint, tpaddr, \
|
|
collector,lockaddr, \
|
|
orig_size, jump_entry, \
|
|
trampoline, \
|
|
trampoline_size, \
|
|
jjump_pad_insn, \
|
|
jjump_pad_insn_size, \
|
|
adjusted_insn_addr, \
|
|
adjusted_insn_addr_end, \
|
|
err)
|
|
|
|
#define target_emit_ops() \
|
|
(the_target->emit_ops ? (*the_target->emit_ops) () : NULL)
|
|
|
|
#define target_supports_disable_randomization() \
|
|
(the_target->supports_disable_randomization ? \
|
|
(*the_target->supports_disable_randomization) () : 0)
|
|
|
|
/* Start non-stop mode, returns 0 on success, -1 on failure. */
|
|
|
|
int start_non_stop (int nonstop);
|
|
|
|
ptid_t mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options,
|
|
int connected_wait);
|
|
|
|
#define prepare_to_access_memory() \
|
|
(the_target->prepare_to_access_memory \
|
|
? (*the_target->prepare_to_access_memory) () \
|
|
: 0)
|
|
|
|
#define done_accessing_memory() \
|
|
do \
|
|
{ \
|
|
if (the_target->done_accessing_memory) \
|
|
(*the_target->done_accessing_memory) (); \
|
|
} while (0)
|
|
|
|
int read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len);
|
|
|
|
int write_inferior_memory (CORE_ADDR memaddr, const unsigned char *myaddr,
|
|
int len);
|
|
|
|
void set_desired_inferior (int id);
|
|
|
|
const char *target_pid_to_str (ptid_t);
|
|
|
|
const char *target_waitstatus_to_string (const struct target_waitstatus *);
|
|
|
|
#endif /* TARGET_H */
|