fafce69ab1
Add file sim-hload.c - generic load for hardware only simulators. Review each simulators sim_open, sim_load, sim_create_inferior so that they more closely match required behavour.
269 lines
8.7 KiB
C
269 lines
8.7 KiB
C
/* This file defines the interface between the simulator and gdb.
|
||
Copyright (C) 1993, 1994, 1996, 1997 Free Software Foundation, Inc.
|
||
|
||
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 2 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, write to the Free Software
|
||
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
||
|
||
#if !defined (REMOTE_SIM_H)
|
||
#define REMOTE_SIM_H 1
|
||
|
||
/* This file is used when building stand-alone simulators, so isolate this
|
||
file from gdb. */
|
||
|
||
/* Pick up CORE_ADDR_TYPE if defined (from gdb), otherwise use same value as
|
||
gdb does (unsigned int - from defs.h). */
|
||
|
||
#ifndef CORE_ADDR_TYPE
|
||
typedef unsigned int SIM_ADDR;
|
||
#else
|
||
typedef CORE_ADDR_TYPE SIM_ADDR;
|
||
#endif
|
||
|
||
|
||
/* Semi-opaque type used as result of sim_open and passed back to all
|
||
other routines. "desc" is short for "descriptor".
|
||
It is up to each simulator to define `sim_state'. */
|
||
|
||
typedef struct sim_state *SIM_DESC;
|
||
|
||
|
||
/* Values for `kind' arg to sim_open. */
|
||
|
||
typedef enum {
|
||
SIM_OPEN_STANDALONE, /* simulator used standalone (run.c) */
|
||
SIM_OPEN_DEBUG /* simulator used by debugger (gdb) */
|
||
} SIM_OPEN_KIND;
|
||
|
||
|
||
/* Return codes from various functions. */
|
||
|
||
typedef enum {
|
||
SIM_RC_FAIL = 0,
|
||
SIM_RC_OK = 1
|
||
} SIM_RC;
|
||
|
||
|
||
/* The bfd struct, as an opaque type. */
|
||
|
||
struct _bfd;
|
||
|
||
|
||
/* Main simulator entry points. */
|
||
|
||
|
||
/* Create a fully initialized simulator instance.
|
||
|
||
(This function is called when the simulator is selected from the
|
||
gdb command line.)
|
||
|
||
KIND specifies how the simulator shall be used. Currently there
|
||
are only two kinds: stand-alone and debug.
|
||
|
||
CALLBACK specifies a standard host callback (defined in callback.h).
|
||
|
||
ABFD, when non NULL, designates a target program. The program is
|
||
not loaded.
|
||
|
||
ARGV is a standard ARGV pointer such as that passed from the
|
||
command line. The syntax of the argument list is is assumed to be
|
||
``SIM-PROG { SIM-OPTION } [ TARGET-PROGRAM { TARGET-OPTION } ]''.
|
||
The trailing TARGET-PROGRAM and args are only valid for a
|
||
stand-alone simulator.
|
||
|
||
On success, the result is a non NULL descriptor that shall be
|
||
passed to the other sim_foo functions. While the simulator
|
||
configuration can be parameterized by (in decreasing precedence)
|
||
ARGV's SIM-OPTION, ARGV's TARGET-PROGRAM and the ABFD argument, the
|
||
successful creation of the simulator shall not dependent on the
|
||
presence of any of these arguments/options.
|
||
|
||
Hardware simulator: The created simulator shall be sufficiently
|
||
initialized to handle, with out restrictions any client requests
|
||
(including memory reads/writes, register fetch/stores and a
|
||
resume).
|
||
|
||
Process simulator: that process is not created until a call to
|
||
sim_create_inferior. FIXME: What should the state of the simulator
|
||
be? */
|
||
|
||
SIM_DESC sim_open PARAMS ((SIM_OPEN_KIND kind, struct host_callback_struct *callback, struct _bfd *abfd, char **argv));
|
||
|
||
|
||
/* Destory a simulator instance.
|
||
|
||
QUITTING is non-zero if we cannot hang on errors.
|
||
|
||
This may involve freeing target memory and closing any open files
|
||
and mmap'd areas. You cannot assume sim_kill has already been
|
||
called. */
|
||
|
||
void sim_close PARAMS ((SIM_DESC sd, int quitting));
|
||
|
||
|
||
/* Load program PROG into the simulators memory.
|
||
|
||
If ABFD is non-NULL, the bfd for the file has already been opened.
|
||
The result is a return code indicating success.
|
||
|
||
Hardware simulator: A call to this function should not effect the
|
||
state of the processor registers. Multiple calls to this function
|
||
are permitted and have an accumulative effect.
|
||
|
||
Process simulator: Calls to this function may be ignored.
|
||
|
||
FIXME: Some hardware targets, before a loaded program can be
|
||
executed, require the manipulation of VM registers and tables.
|
||
Such manipulation should probably (?) occure in
|
||
sim_create_inferior. */
|
||
|
||
SIM_RC sim_load PARAMS ((SIM_DESC sd, char *prog, struct _bfd *abfd, int from_tty));
|
||
|
||
|
||
/* Prepare to run the simulated program.
|
||
|
||
ABFD, if not NULL, provides initial processor state information.
|
||
ARGV and ENV, if non NULL, are NULL terminated lists of pointers.
|
||
|
||
Hardware simulator: This function shall initialize the processor
|
||
registers to a known value. The program counter and possibly stack
|
||
pointer shall be set using information obtained from ABFD (or
|
||
hardware reset defaults). ARGV and ENV, dependant on the target
|
||
ABI, may be written to memory.
|
||
|
||
Process simulator: After a call to this function, a new process
|
||
instance shall exist. The TEXT, DATA, BSS and stack regions shall
|
||
all be initialized, ARGV and ENV shall be written to process
|
||
address space (according to the applicable ABI) and the program
|
||
counter and stack pointer set accordingly. */
|
||
|
||
SIM_RC sim_create_inferior PARAMS ((SIM_DESC sd, struct _bfd *abfd, char **argv, char **env));
|
||
|
||
|
||
/* Read LENGTH bytes of the simulated program's memory and store in
|
||
BUF. Result is number of bytes read, or zero if error. */
|
||
|
||
int sim_read PARAMS ((SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length));
|
||
|
||
|
||
/* Store LENGTH bytes from BUF in the simulated program's memory.
|
||
Result is number of bytes write, or zero if error. */
|
||
|
||
int sim_write PARAMS ((SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length));
|
||
|
||
|
||
/* Fetch register REGNO and store the raw (target endian) value in
|
||
BUF. */
|
||
|
||
void sim_fetch_register PARAMS ((SIM_DESC sd, int regno, unsigned char *buf));
|
||
|
||
|
||
/* Store register REGNO from the raw (target endian) value in BUF. */
|
||
|
||
void sim_store_register PARAMS ((SIM_DESC sd, int regno, unsigned char *buf));
|
||
|
||
|
||
/* Print whatever statistics the simulator has collected.
|
||
|
||
VERBOSE is currently unused and must always be zero. */
|
||
|
||
void sim_info PARAMS ((SIM_DESC sd, int verbose));
|
||
|
||
|
||
/* Run (or resume) the simulated program. */
|
||
|
||
void sim_resume PARAMS ((SIM_DESC sd, int step, int siggnal));
|
||
|
||
|
||
/* Asynchronous request to stop the simulation.
|
||
A nonzero return indicates that the simulator is able to handle
|
||
the request */
|
||
|
||
int sim_stop PARAMS ((SIM_DESC sd));
|
||
|
||
|
||
/* Fetch the REASON why the program stopped.
|
||
|
||
SIM_EXITED: The program has terminated. SIGRC indicates the target
|
||
dependant exit status.
|
||
|
||
SIM_STOPPED: The program has stopped. SIGRC indicates the reason:
|
||
program interrupted by user via a sim_stop request (SIGINT); a
|
||
breakpoint instruction (SIGTRAP); a completed step (SIGTRAP); an
|
||
internal error condition (SIGABRT).
|
||
|
||
SIM_SIGNALLED: The simulator encountered target code that requires
|
||
the signal SIGRC to be delivered to the simulated program.
|
||
|
||
SIM_RUNNING, SIM_POLLING: The return of one of these values
|
||
indicates a problem internal to the simulator. */
|
||
|
||
enum sim_stop { sim_running, sim_polling, sim_exited, sim_stopped, sim_signalled };
|
||
|
||
void sim_stop_reason PARAMS ((SIM_DESC sd, enum sim_stop *reason, int *sigrc));
|
||
|
||
|
||
/* Passthru for other commands that the simulator might support.
|
||
Simulators should be prepared to deal with any combination of NULL
|
||
or empty CMD. */
|
||
|
||
void sim_do_command PARAMS ((SIM_DESC sd, char *cmd));
|
||
|
||
|
||
/* Provide simulator with a default (global) host_callback_struct.
|
||
THIS PROCEDURE IS DEPRECIATED.
|
||
GDB and NRUN do not use this interface.
|
||
This procedure does not take a SIM_DESC argument as it is
|
||
used before sim_open. */
|
||
|
||
void sim_set_callbacks PARAMS ((struct host_callback_struct *));
|
||
|
||
|
||
/* Set the size of the simulator memory array.
|
||
THIS PROCEDURE IS DEPRECIATED.
|
||
GDB and NRUN do not use this interface.
|
||
This procedure does not take a SIM_DESC argument as it is
|
||
used before sim_open. */
|
||
|
||
void sim_size PARAMS ((int i));
|
||
|
||
|
||
/* Run a simulation with tracing enabled.
|
||
THIS PROCEDURE IS DEPRECIATED.
|
||
GDB and NRUN do not use this interface.
|
||
This procedure does not take a SIM_DESC argument as it is
|
||
used before sim_open. */
|
||
|
||
int sim_trace PARAMS ((SIM_DESC sd));
|
||
|
||
|
||
/* Configure the size of the profile buffer.
|
||
THIS PROCEDURE IS DEPRECIATED.
|
||
GDB and NRUN do not use this interface.
|
||
This procedure does not take a SIM_DESC argument as it is
|
||
used before sim_open. */
|
||
|
||
void sim_set_profile_size PARAMS ((int n));
|
||
|
||
|
||
/* Kill the running program.
|
||
THIS PROCEDURE IS DEPRECIATED.
|
||
GDB and NRUN do not use this interface.
|
||
This procedure will be replaced as part of the introduction of
|
||
multi-cpu simulators. */
|
||
|
||
void sim_kill PARAMS ((SIM_DESC sd));
|
||
|
||
#endif /* !defined (REMOTE_SIM_H) */
|