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[/] [openrisc/] [trunk/] [gnu-old/] [gdb-7.1/] [include/] [gdb/] [remote-sim.h] - Blame information for rev 834

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1 227 jeremybenn
/* This file defines the interface between the simulator and gdb.
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   Copyright 1993, 1994, 1996, 1997, 1998, 2000, 2002, 2007, 2008, 2009, 2010
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   Free Software Foundation, Inc.
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   This file is part of GDB.
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   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 3 of the License, or
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   (at your option) any later version.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
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#if !defined (REMOTE_SIM_H)
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#define REMOTE_SIM_H 1
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* This file is used when building stand-alone simulators, so isolate this
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   file from gdb.  */
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/* Pick up CORE_ADDR_TYPE if defined (from gdb), otherwise use same value as
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   gdb does (unsigned int - from defs.h).  */
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#ifndef CORE_ADDR_TYPE
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typedef unsigned int SIM_ADDR;
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#else
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typedef CORE_ADDR_TYPE SIM_ADDR;
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#endif
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/* Semi-opaque type used as result of sim_open and passed back to all
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   other routines.  "desc" is short for "descriptor".
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   It is up to each simulator to define `sim_state'.  */
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typedef struct sim_state *SIM_DESC;
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/* Values for `kind' arg to sim_open.  */
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typedef enum {
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  SIM_OPEN_STANDALONE, /* simulator used standalone (run.c) */
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  SIM_OPEN_DEBUG       /* simulator used by debugger (gdb) */
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} SIM_OPEN_KIND;
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/* Return codes from various functions.  */
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typedef enum {
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  SIM_RC_FAIL = 0,
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  SIM_RC_OK = 1
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} SIM_RC;
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/* The bfd struct, as an opaque type.  */
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struct bfd;
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/* Main simulator entry points.  */
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/* Create a fully initialized simulator instance.
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   (This function is called when the simulator is selected from the
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   gdb command line.)
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   KIND specifies how the simulator shall be used.  Currently there
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   are only two kinds: stand-alone and debug.
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   CALLBACK specifies a standard host callback (defined in callback.h).
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   ABFD, when non NULL, designates a target program.  The program is
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   not loaded.
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   ARGV is a standard ARGV pointer such as that passed from the
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   command line.  The syntax of the argument list is is assumed to be
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   ``SIM-PROG { SIM-OPTION } [ TARGET-PROGRAM { TARGET-OPTION } ]''.
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   The trailing TARGET-PROGRAM and args are only valid for a
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   stand-alone simulator.
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   On success, the result is a non NULL descriptor that shall be
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   passed to the other sim_foo functions.  While the simulator
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   configuration can be parameterized by (in decreasing precedence)
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   ARGV's SIM-OPTION, ARGV's TARGET-PROGRAM and the ABFD argument, the
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   successful creation of the simulator shall not dependent on the
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   presence of any of these arguments/options.
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   Hardware simulator: The created simulator shall be sufficiently
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   initialized to handle, with out restrictions any client requests
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   (including memory reads/writes, register fetch/stores and a
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   resume).
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   Process simulator: that process is not created until a call to
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   sim_create_inferior.  FIXME: What should the state of the simulator
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   be? */
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SIM_DESC sim_open PARAMS ((SIM_OPEN_KIND kind, struct host_callback_struct *callback, struct bfd *abfd, char **argv));
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/* Destory a simulator instance.
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   QUITTING is non-zero if we cannot hang on errors.
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   This may involve freeing target memory and closing any open files
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   and mmap'd areas.  You cannot assume sim_kill has already been
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   called. */
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void sim_close PARAMS ((SIM_DESC sd, int quitting));
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/* Load program PROG into the simulators memory.
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   If ABFD is non-NULL, the bfd for the file has already been opened.
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   The result is a return code indicating success.
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   Hardware simulator: Normally, each program section is written into
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   memory according to that sections LMA using physical (direct)
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   addressing.  The exception being systems, such as PPC/CHRP, which
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   support more complicated program loaders.  A call to this function
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   should not effect the state of the processor registers.  Multiple
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   calls to this function are permitted and have an accumulative
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   effect.
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   Process simulator: Calls to this function may be ignored.
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   FIXME: Most hardware simulators load the image at the VMA using
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   virtual addressing.
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   FIXME: For some hardware targets, before a loaded program can be
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   executed, it requires the manipulation of VM registers and tables.
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   Such manipulation should probably (?) occure in
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   sim_create_inferior. */
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SIM_RC sim_load PARAMS ((SIM_DESC sd, char *prog, struct bfd *abfd, int from_tty));
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/* Prepare to run the simulated program.
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   ABFD, if not NULL, provides initial processor state information.
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   ARGV and ENV, if non NULL, are NULL terminated lists of pointers.
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   Hardware simulator: This function shall initialize the processor
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   registers to a known value.  The program counter and possibly stack
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   pointer shall be set using information obtained from ABFD (or
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   hardware reset defaults).  ARGV and ENV, dependant on the target
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   ABI, may be written to memory.
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   Process simulator: After a call to this function, a new process
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   instance shall exist. The TEXT, DATA, BSS and stack regions shall
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   all be initialized, ARGV and ENV shall be written to process
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   address space (according to the applicable ABI) and the program
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   counter and stack pointer set accordingly. */
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SIM_RC sim_create_inferior PARAMS ((SIM_DESC sd, struct bfd *abfd, char **argv, char **env));
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/* Fetch LENGTH bytes of the simulated program's memory.  Start fetch
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   at virtual address MEM and store in BUF.  Result is number of bytes
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   read, or zero if error.  */
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int sim_read PARAMS ((SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length));
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/* Store LENGTH bytes from BUF into the simulated program's
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   memory. Store bytes starting at virtual address MEM. Result is
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   number of bytes write, or zero if error.  */
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int sim_write PARAMS ((SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length));
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/* Fetch register REGNO storing its raw (target endian) value in the
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   LENGTH byte buffer BUF.  Return the actual size of the register or
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   zero if REGNO is not applicable.
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   Legacy implementations ignore LENGTH and always return -1.
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   If LENGTH does not match the size of REGNO no data is transfered
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   (the actual register size is still returned). */
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int sim_fetch_register PARAMS ((SIM_DESC sd, int regno, unsigned char *buf, int length));
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/* Store register REGNO from the raw (target endian) value in BUF.
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   Return the actual size of the register or zero if REGNO is not
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   applicable.
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   Legacy implementations ignore LENGTH and always return -1.
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   If LENGTH does not match the size of REGNO no data is transfered
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   (the actual register size is still returned). */
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int sim_store_register PARAMS ((SIM_DESC sd, int regno, unsigned char *buf, int length));
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/* Print whatever statistics the simulator has collected.
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   VERBOSE is currently unused and must always be zero.  */
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void sim_info PARAMS ((SIM_DESC sd, int verbose));
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/* Run (or resume) the simulated program.
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   STEP, when non-zero indicates that only a single simulator cycle
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   should be emulated.
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   SIGGNAL, if non-zero is a (HOST) SIGRC value indicating the type of
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   event (hardware interrupt, signal) to be delivered to the simulated
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   program.
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   Hardware simulator: If the SIGRC value returned by
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   sim_stop_reason() is passed back to the simulator via SIGGNAL then
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   the hardware simulator shall correctly deliver the hardware event
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   indicated by that signal.  If a value of zero is passed in then the
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   simulation will continue as if there were no outstanding signal.
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   The effect of any other SIGGNAL value is is implementation
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   dependant.
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   Process simulator: If SIGRC is non-zero then the corresponding
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   signal is delivered to the simulated program and execution is then
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   continued.  A zero SIGRC value indicates that the program should
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   continue as normal. */
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void sim_resume PARAMS ((SIM_DESC sd, int step, int siggnal));
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/* Asynchronous request to stop the simulation.
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   A nonzero return indicates that the simulator is able to handle
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   the request */
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int sim_stop PARAMS ((SIM_DESC sd));
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/* Fetch the REASON why the program stopped.
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   SIM_EXITED: The program has terminated. SIGRC indicates the target
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   dependant exit status.
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   SIM_STOPPED: The program has stopped.  SIGRC uses the host's signal
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   numbering as a way of identifying the reaon: program interrupted by
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   user via a sim_stop request (SIGINT); a breakpoint instruction
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   (SIGTRAP); a completed single step (SIGTRAP); an internal error
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   condition (SIGABRT); an illegal instruction (SIGILL); Access to an
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   undefined memory region (SIGSEGV); Mis-aligned memory access
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   (SIGBUS).  For some signals information in addition to the signal
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   number may be retained by the simulator (e.g. offending address),
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   that information is not directly accessable via this interface.
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   SIM_SIGNALLED: The program has been terminated by a signal. The
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   simulator has encountered target code that causes the the program
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   to exit with signal SIGRC.
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   SIM_RUNNING, SIM_POLLING: The return of one of these values
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   indicates a problem internal to the simulator. */
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enum sim_stop { sim_running, sim_polling, sim_exited, sim_stopped, sim_signalled };
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void sim_stop_reason PARAMS ((SIM_DESC sd, enum sim_stop *reason, int *sigrc));
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/* Passthru for other commands that the simulator might support.
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   Simulators should be prepared to deal with any combination of NULL
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   or empty CMD. */
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void sim_do_command PARAMS ((SIM_DESC sd, char *cmd));
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#ifdef __cplusplus
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}
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#endif
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#endif /* !defined (REMOTE_SIM_H) */

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