old-cross-binutils/sim/v850/interp.c

509 lines
8.3 KiB
C
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#include <signal.h>
#include "sysdep.h"
#include "bfd.h"
#include "remote-sim.h"
#include "callback.h"
#include "v850_sim.h"
#ifndef INLINE
#ifdef __GNUC__
#define INLINE inline
#else
#define INLINE
#endif
#endif
#define MEM_SIZE 18 /* V850 memory size is 18 bits XXX */
host_callback *v850_callback;
int v850_debug;
uint32 OP[4];
static struct hash_entry *lookup_hash PARAMS ((uint32 ins));
static long hash PARAMS ((long));
static void do_format_1_2 PARAMS ((uint32));
static void do_format_3 PARAMS ((uint32));
static void do_format_4 PARAMS ((uint32));
static void do_format_5 PARAMS ((uint32));
static void do_format_6 PARAMS ((uint32));
static void do_format_7 PARAMS ((uint32));
static void do_format_8 PARAMS ((uint32));
static void do_format_9_10 PARAMS ((uint32));
static void init_system PARAMS ((void));
#define MAX_HASH 63
struct hash_entry
{
struct hash_entry *next;
long opcode;
long mask;
struct simops *ops;
};
struct hash_entry hash_table[MAX_HASH+1];
static INLINE long
hash(insn)
long insn;
{
if ((insn & 0x0600) == 0
|| (insn & 0x0700) == 0x0200
|| (insn & 0x0700) == 0x0600
|| (insn & 0x0780) == 0x0700)
return (insn & 0x07e0) >> 5;
if ((insn & 0x0700) == 0x0300
|| (insn & 0x0700) == 0x0400
|| (insn & 0x0700) == 0x0500)
return (insn & 0x0780) >> 7;
if ((insn & 0x07c0) == 0x0780)
return (insn & 0x07c0) >> 6;
return (insn & 0x07e0) >> 5;
}
static struct hash_entry *
lookup_hash (ins)
uint32 ins;
{
struct hash_entry *h;
h = &hash_table[hash(ins)];
while ((ins & h->mask) != h->opcode)
{
if (h->next == NULL)
{
(*v850_callback->printf_filtered) (v850_callback, "ERROR looking up hash for %x\n", ins);
exit(1);
}
h = h->next;
}
return (h);
}
uint8
get_byte (x)
uint8 *x;
{
return *x;
}
uint16
get_half (x)
uint8 *x;
{
uint8 *a = x;
return (a[1] << 8) + (a[0]);
}
uint32
get_word (x)
uint8 *x;
{
uint8 *a = x;
return (a[3]<<24) + (a[2]<<16) + (a[1]<<8) + (a[0]);
}
void
put_byte (addr, data)
uint8 *addr;
uint8 data;
{
uint8 *a = addr;
a[0] = data;
}
void
put_half (addr, data)
uint8 *addr;
uint16 data;
{
uint8 *a = addr;
a[0] = data & 0xff;
a[1] = (data >> 8) & 0xff;
}
void
put_word (addr, data)
uint8 *addr;
uint32 data;
{
uint8 *a = addr;
a[0] = data & 0xff;
a[1] = (data >> 8) & 0xff;
a[2] = (data >> 16) & 0xff;
a[3] = (data >> 24) & 0xff;
}
static void
do_format_1_2 (insn)
uint32 insn;
{
struct hash_entry *h;
h = lookup_hash (insn);
OP[0] = insn & 0x1f;
OP[1] = (insn >> 11) & 0x1f;
(h->ops->func) ();
}
static void
do_format_3 (insn)
uint32 insn;
{
struct hash_entry *h;
h = lookup_hash (insn);
OP[0] = (((insn & 0x70) >> 4) | ((insn & 0xf800) >> 8)) << 1;
(h->ops->func) ();
}
static void
do_format_4 (insn)
uint32 insn;
{
struct hash_entry *h;
h = lookup_hash (insn);
OP[0] = (insn >> 11) & 0x1f;
OP[1] = (insn & 0x7f);
(h->ops->func) ();
}
static void
do_format_5 (insn)
uint32 insn;
{
struct hash_entry *h;
h = lookup_hash (insn);
OP[0] = (((insn & 0x3f) << 15) | ((insn >> 17) & 0x7fff)) << 1;
OP[1] = (insn >> 11) & 0x1f;
(h->ops->func) ();
}
static void
do_format_6 (insn)
uint32 insn;
{
struct hash_entry *h;
h = lookup_hash (insn);
OP[0] = (insn >> 16) & 0xffff;
OP[1] = insn & 0x1f;
OP[2] = (insn >> 11) & 0x1f;
(h->ops->func) ();
}
static void
do_format_7 (insn)
uint32 insn;
{
struct hash_entry *h;
h = lookup_hash (insn);
OP[0] = insn & 0x1f;
OP[1] = (insn >> 11) & 0x1f;
OP[2] = (insn >> 16) & 0xffff;
(h->ops->func) ();
}
static void
do_format_8 (insn)
uint32 insn;
{
struct hash_entry *h;
h = lookup_hash (insn);
OP[0] = insn & 0x1f;
OP[1] = (insn >> 11) & 0x7;
OP[2] = (insn >> 16) & 0xffff;
(h->ops->func) ();
}
static void
do_format_9_10 (insn)
uint32 insn;
{
struct hash_entry *h;
h = lookup_hash (insn);
OP[0] = insn & 0x1f;
OP[1] = (insn >> 11) & 0x1f;
(h->ops->func) ();
}
void
sim_size (power)
int power;
{
if (State.mem)
{
free (State.mem);
}
State.mem = (uint8 *)calloc(1,1<<MEM_SIZE);
if (!State.mem)
{
(*v850_callback->printf_filtered) (v850_callback, "Memory allocation failed.\n");
exit(1);
}
}
static void
init_system ()
{
if (!State.mem)
sim_size(1);
}
int
sim_write (addr, buffer, size)
SIM_ADDR addr;
unsigned char *buffer;
int size;
{
int i;
init_system ();
for (i = 0; i < size; i++)
{
State.mem[i+addr] = buffer[i];
}
return size;
}
void
sim_open (args)
char *args;
{
struct simops *s;
struct hash_entry *h;
if (args != NULL)
{
#ifdef DEBUG
if (strcmp (args, "-t") == 0)
v850_debug = DEBUG;
else
#endif
(*v850_callback->printf_filtered) (v850_callback, "ERROR: unsupported option(s): %s\n",args);
}
/* put all the opcodes in the hash table */
for (s = Simops; s->func; s++)
{
h = &hash_table[hash(s->opcode)];
/* go to the last entry in the chain */
while (h->next)
h = h->next;
if (h->ops)
{
h->next = calloc(1,sizeof(struct hash_entry));
h = h->next;
}
h->ops = s;
h->mask = s->mask;
h->opcode = s->opcode;
}
}
void
sim_close (quitting)
int quitting;
{
/* nothing to do */
}
void
sim_set_profile (n)
int n;
{
(*v850_callback->printf_filtered) (v850_callback, "sim_set_profile %d\n", n);
}
void
sim_set_profile_size (n)
int n;
{
(*v850_callback->printf_filtered) (v850_callback, "sim_set_profile_size %d\n", n);
}
void
sim_resume (step, siggnal)
int step, siggnal;
{
uint32 inst, opcode;
reg_t oldpc;
PC = State.sregs[0];
if (step)
State.exception = SIGTRAP;
else
State.exception = 0;
do
{
inst = RLW (PC);
oldpc = PC;
opcode = (inst & 0x07e0) >> 5;
if ((opcode & 0x30) == 0
|| (opcode & 0x38) == 0x10)
{
do_format_1_2 (inst & 0xffff);
PC += 2;
}
else if ((opcode & 0x3C) == 0x18
|| (opcode & 0x3C) == 0x1C
|| (opcode & 0x3C) == 0x20
|| (opcode & 0x3C) == 0x24
|| (opcode & 0x3C) == 0x28)
{
do_format_4 (inst & 0xffff);
PC += 2;
}
else if ((opcode & 0x3C) == 0x2C)
{
do_format_3 (inst & 0xffff);
/* No PC update, it's done in the instruction. */
}
else if ((opcode & 0x38) == 0x30)
{
do_format_6 (inst);
PC += 4;
}
else if ((opcode & 0x3C) == 0x38)
{
do_format_7 (inst);
PC += 4;
}
else if ((opcode & 0x3E) == 0x3C)
{
do_format_5 (inst);
/* No PC update, it's done in the instruction. */
}
else if ((opcode & 0x3F) == 0x3E)
{
do_format_8 (inst);
PC += 4;
}
else
{
do_format_9_10 (inst);
PC += 4;
}
}
while (!State.exception);
State.sregs[0] = PC;
}
int
sim_trace ()
{
#ifdef DEBUG
v850_debug = DEBUG;
#endif
sim_resume (0, 0);
return 1;
}
void
sim_info (verbose)
int verbose;
{
(*v850_callback->printf_filtered) (v850_callback, "sim_info\n");
}
void
sim_create_inferior (start_address, argv, env)
SIM_ADDR start_address;
char **argv;
char **env;
{
PC = start_address;
}
void
sim_kill ()
{
/* nothing to do */
}
void
sim_set_callbacks(p)
host_callback *p;
{
v850_callback = p;
}
1996-09-03 17:15:16 +00:00
/* All the code for exiting, signals, etc needs to be revamped.
This is enough to get c-torture limping though. */
void
sim_stop_reason (reason, sigrc)
enum sim_stop *reason;
int *sigrc;
{
*reason = sim_stopped;
if (State.exception == SIGQUIT)
*sigrc = 0;
else
*sigrc = State.exception;
}
void
sim_fetch_register (rn, memory)
int rn;
unsigned char *memory;
{
put_word (memory, State.regs[rn]);
}
void
sim_store_register (rn, memory)
int rn;
unsigned char *memory;
{
State.regs[rn] = get_word (memory);
}
int
sim_read (addr, buffer, size)
SIM_ADDR addr;
unsigned char *buffer;
int size;
{
int i;
for (i = 0; i < size; i++)
{
buffer[i] = State.mem[addr + i];
}
return size;
}
void
sim_do_command (cmd)
char *cmd;
{
(*v850_callback->printf_filtered) (v850_callback, "sim_do_command: %s\n", cmd);
}
int
sim_load (prog, from_tty)
char *prog;
int from_tty;
{
/* Return nonzero so GDB will handle it. */
return 1;
}