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old-cross-binutils/sim/arm/wrapper.c

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/* run front end support for arm
Copyright (C) 1995, 1996, 1997, 2000 Free Software Foundation, Inc.
This file is part of ARM SIM.
GNU CC 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, or (at your option)
any later version.
GNU CC 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. */
/* This file provides the interface between the simulator and run.c and gdb
(when the simulator is linked with gdb).
All simulator interaction should go through this file. */
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <bfd.h>
#include <signal.h>
#include "callback.h"
#include "remote-sim.h"
#include "armdefs.h"
#include "armemu.h"
#include "dbg_rdi.h"
#include "ansidecl.h"
host_callback *sim_callback;
static struct ARMul_State *state;
/* Who is using the simulator. */
static SIM_OPEN_KIND sim_kind;
/* argv[0] */
static char *myname;
/* Memory size in bytes. */
static int mem_size = (1 << 21);
/* Non-zero to display start up banner, and maybe other things. */
static int verbosity;
/* Non-zero to set big endian mode. */
static int big_endian;
int stop_simulator;
static void
init ()
{
static int done;
if (!done)
{
ARMul_EmulateInit ();
state = ARMul_NewState ();
state->bigendSig = (big_endian ? HIGH : LOW);
ARMul_MemoryInit (state, mem_size);
ARMul_OSInit (state);
ARMul_CoProInit (state);
state->verbose = verbosity;
done = 1;
}
}
/* Set verbosity level of simulator.
This is not intended to produce detailed tracing or debugging information.
Just summaries. */
/* FIXME: common/run.c doesn't do this yet. */
void
sim_set_verbose (v)
int v;
{
verbosity = v;
}
/* Set the memory size to SIZE bytes.
Must be called before initializing simulator. */
/* FIXME: Rename to sim_set_mem_size. */
void
sim_size (size)
int size;
{
mem_size = size;
}
void
ARMul_ConsolePrint (ARMul_State * state, const char *format, ...)
{
va_list ap;
if (state->verbose)
{
va_start (ap, format);
vprintf (format, ap);
va_end (ap);
}
}
ARMword
ARMul_Debug (ARMul_State * state ATTRIBUTE_UNUSED, ARMword pc ATTRIBUTE_UNUSED, ARMword instr ATTRIBUTE_UNUSED)
{
return 0;
}
int SWI_vector_installed = FALSE;
int
sim_write (sd, addr, buffer, size)
SIM_DESC sd ATTRIBUTE_UNUSED;
SIM_ADDR addr;
unsigned char *buffer;
int size;
{
int i;
init ();
if ((addr <= 0x8) && ((addr + size) >= 0x8))
SWI_vector_installed = TRUE;
for (i = 0; i < size; i++)
ARMul_WriteByte (state, addr + i, buffer[i]);
return size;
}
int
sim_read (sd, addr, buffer, size)
SIM_DESC sd ATTRIBUTE_UNUSED;
SIM_ADDR addr;
unsigned char *buffer;
int size;
{
int i;
init ();
for (i = 0; i < size; i++)
{
buffer[i] = ARMul_ReadByte (state, addr + i);
}
return size;
}
int
sim_trace (sd)
SIM_DESC sd ATTRIBUTE_UNUSED;
{
(*sim_callback->printf_filtered) (sim_callback,
"This simulator does not support tracing\n");
return 1;
}
int
sim_stop (sd)
SIM_DESC sd ATTRIBUTE_UNUSED;
{
state->Emulate = STOP;
stop_simulator = 1;
return 1;
}
void
sim_resume (sd, step, siggnal)
SIM_DESC sd ATTRIBUTE_UNUSED;
int step;
int siggnal ATTRIBUTE_UNUSED;
{
state->EndCondition = 0;
stop_simulator = 0;
if (step)
{
state->Reg[15] = ARMul_DoInstr (state);
if (state->EndCondition == 0)
state->EndCondition = RDIError_BreakpointReached;
}
else
{
#if 1 /* JGS */
state->NextInstr = RESUME; /* treat as PC change */
#endif
state->Reg[15] = ARMul_DoProg (state);
}
FLUSHPIPE;
}
SIM_RC
sim_create_inferior (sd, abfd, argv, env)
SIM_DESC sd ATTRIBUTE_UNUSED;
struct _bfd *abfd;
char **argv;
char **env;
{
int argvlen = 0;
int mach;
char **arg;
if (abfd != NULL)
ARMul_SetPC (state, bfd_get_start_address (abfd));
else
ARMul_SetPC (state, 0); /* ??? */
mach = bfd_get_mach (abfd);
switch (mach)
{
default:
(*sim_callback->printf_filtered) (sim_callback,
"Unknown machine type; please update sim_create_inferior.\n");
/* fall through */
case 0:
/* We wouldn't set the machine type with earlier toolchains, so we
explicitly select a processor capable of supporting all ARMs in
32bit mode. */
case bfd_mach_arm_5:
case bfd_mach_arm_5T:
ARMul_SelectProcessor (state, ARM_v5_Prop);
break;
case bfd_mach_arm_5TE:
ARMul_SelectProcessor (state, ARM_v5_Prop | ARM_v5e_Prop);
break;
case bfd_mach_arm_XScale:
ARMul_SelectProcessor (state, ARM_v5_Prop | ARM_v5e_Prop | ARM_XScale_Prop);
break;
case bfd_mach_arm_4:
case bfd_mach_arm_4T:
ARMul_SelectProcessor (state, ARM_v4_Prop);
break;
case bfd_mach_arm_3:
case bfd_mach_arm_3M:
ARMul_SelectProcessor (state, ARM_Lock_Prop);
break;
case bfd_mach_arm_2:
case bfd_mach_arm_2a:
ARMul_SelectProcessor (state, ARM_Fix26_Prop);
break;
}
if (mach > 3)
{
/* Reset mode to ARM. A gdb user may rerun a program that had entered
THUMB mode from the start and cause the ARM-mode startup code to be
executed in THUMB mode. */
ARMul_SetCPSR (state, USER32MODE);
}
if (argv != NULL)
{
/*
** Set up the command line (by laboriously stringing together the
** environment carefully picked apart by our caller...)
*/
/* Free any old stuff */
if (state->CommandLine != NULL)
{
free (state->CommandLine);
state->CommandLine = NULL;
}
/* See how much we need */
for (arg = argv; *arg != NULL; arg++)
argvlen += strlen (*arg) + 1;
/* allocate it... */
state->CommandLine = malloc (argvlen + 1);
if (state->CommandLine != NULL)
{
arg = argv;
state->CommandLine[0] = '\0';
for (arg = argv; *arg != NULL; arg++)
{
strcat (state->CommandLine, *arg);
strcat (state->CommandLine, " ");
}
}
}
if (env != NULL)
{
/* Now see if there's a MEMSIZE spec in the environment */
while (*env)
{
if (strncmp (*env, "MEMSIZE=", sizeof ("MEMSIZE=") - 1) == 0)
{
char *end_of_num;
/* Set up memory limit */
state->MemSize =
strtoul (*env + sizeof ("MEMSIZE=") - 1, &end_of_num, 0);
}
env++;
}
}
return SIM_RC_OK;
}
void
sim_info (sd, verbose)
SIM_DESC sd ATTRIBUTE_UNUSED;
int verbose ATTRIBUTE_UNUSED;
{
}
static int
frommem (state, memory)
struct ARMul_State *state;
unsigned char *memory;
{
if (state->bigendSig == HIGH)
{
return (memory[0] << 24)
| (memory[1] << 16) | (memory[2] << 8) | (memory[3] << 0);
}
else
{
return (memory[3] << 24)
| (memory[2] << 16) | (memory[1] << 8) | (memory[0] << 0);
}
}
static void
tomem (state, memory, val)
struct ARMul_State *state;
unsigned char *memory;
int val;
{
if (state->bigendSig == HIGH)
{
memory[0] = val >> 24;
memory[1] = val >> 16;
memory[2] = val >> 8;
memory[3] = val >> 0;
}
else
{
memory[3] = val >> 24;
memory[2] = val >> 16;
memory[1] = val >> 8;
memory[0] = val >> 0;
}
}
int
sim_store_register (sd, rn, memory, length)
SIM_DESC sd ATTRIBUTE_UNUSED;
int rn;
unsigned char *memory;
int length ATTRIBUTE_UNUSED;
{
init ();
if (rn == 25)
{
state->Cpsr = frommem (state, memory);
ARMul_CPSRAltered (state);
}
else
ARMul_SetReg (state, state->Mode, rn, frommem (state, memory));
return -1;
}
int
sim_fetch_register (sd, rn, memory, length)
SIM_DESC sd ATTRIBUTE_UNUSED;
int rn;
unsigned char *memory;
int length ATTRIBUTE_UNUSED;
{
ARMword regval;
init ();
if (rn < 16)
regval = ARMul_GetReg (state, state->Mode, rn);
else if (rn == 25) /* FIXME: use PS_REGNUM from gdb/config/arm/tm-arm.h */
regval = ARMul_GetCPSR (state);
else
regval = 0; /* FIXME: should report an error */
tomem (state, memory, regval);
return -1;
}
SIM_DESC
sim_open (kind, ptr, abfd, argv)
SIM_OPEN_KIND kind;
host_callback *ptr;
struct _bfd *abfd;
char **argv;
{
sim_kind = kind;
if (myname) free (myname);
myname = (char *) xstrdup (argv[0]);
sim_callback = ptr;
/* Decide upon the endian-ness of the processor.
If we can, get the information from the bfd itself.
Otherwise look to see if we have been given a command
line switch that tells us. Otherwise default to little endian. */
if (abfd != NULL)
big_endian = bfd_big_endian (abfd);
else if (argv[1] != NULL)
{
int i;
/* Scan for endian-ness switch. */
for (i = 0; (argv[i] != NULL) && (argv[i][0] != 0); i++)
if (argv[i][0] == '-' && argv[i][1] == 'E')
{
char c;
if ((c = argv[i][2]) == 0)
{
++i;
c = argv[i][0];
}
switch (c)
{
case 0:
sim_callback->printf_filtered
(sim_callback, "No argument to -E option provided\n");
break;
case 'b':
case 'B':
big_endian = 1;
break;
case 'l':
case 'L':
big_endian = 0;
break;
default:
sim_callback->printf_filtered
(sim_callback, "Unrecognised argument to -E option\n");
break;
}
}
}
return (SIM_DESC) 1;
}
void
sim_close (sd, quitting)
SIM_DESC sd ATTRIBUTE_UNUSED;
int quitting ATTRIBUTE_UNUSED;
{
if (myname) free (myname);
myname = NULL;
}
SIM_RC
sim_load (sd, prog, abfd, from_tty)
SIM_DESC sd;
char *prog;
bfd *abfd;
int from_tty ATTRIBUTE_UNUSED;
{
extern bfd *sim_load_file (); /* ??? Don't know where this should live. */
bfd *prog_bfd;
prog_bfd = sim_load_file (sd, myname, sim_callback, prog, abfd,
sim_kind == SIM_OPEN_DEBUG, 0, sim_write);
if (prog_bfd == NULL)
return SIM_RC_FAIL;
ARMul_SetPC (state, bfd_get_start_address (prog_bfd));
if (abfd == NULL)
bfd_close (prog_bfd);
return SIM_RC_OK;
}
void
sim_stop_reason (sd, reason, sigrc)
SIM_DESC sd ATTRIBUTE_UNUSED;
enum sim_stop *reason;
int *sigrc;
{
if (stop_simulator)
{
*reason = sim_stopped;
*sigrc = SIGINT;
}
else if (state->EndCondition == 0)
{
*reason = sim_exited;
*sigrc = state->Reg[0] & 255;
}
else
{
*reason = sim_stopped;
if (state->EndCondition == RDIError_BreakpointReached)
*sigrc = SIGTRAP;
else
*sigrc = 0;
}
}
void
sim_do_command (sd, cmd)
SIM_DESC sd ATTRIBUTE_UNUSED;
char *cmd ATTRIBUTE_UNUSED;
{
(*sim_callback->printf_filtered) (sim_callback,
"This simulator does not accept any commands.\n");
}
void
sim_set_callbacks (ptr)
host_callback *ptr;
{
sim_callback = ptr;
}
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