* AND FITNESS FOR A PARTICULAR PURPOSE.
*/
+#include "config.h"
+
+#include <stdio.h>
#include <signal.h>
-#include <sys/times.h>
+#ifdef HAVE_TIME_H
+#include <time.h>
+#endif
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
+#endif
#include "ansidecl.h"
-#include "sysdep.h"
-#include "remote-sim.h"
+#include "bfd.h"
+#include "gdb/callback.h"
+#include "gdb/remote-sim.h"
+#include "gdb/sim-h8300.h"
+#include "sys/stat.h"
+#include "sys/types.h"
+
+#ifndef SIGTRAP
+# define SIGTRAP 5
+#endif
int debug;
+host_callback *sim_callback;
+
+static SIM_OPEN_KIND sim_kind;
+static char *myname;
+
+/* FIXME: Needs to live in header file.
+ This header should also include the things in remote-sim.h.
+ One could move this to remote-sim.h but this function isn't needed
+ by gdb. */
+void sim_set_simcache_size PARAMS ((int));
-#define X(op, size) op*4+size
+#define X(op, size) op * 4 + size
-#define SP (h8300hmode ? SL:SW)
+#define SP (h8300hmode ? SL : SW)
#define SB 0
#define SW 1
#define SL 2
#define OP_CCR 7
#define OP_IMM 8
#define OP_ABS 10
+#define OP_EXR 11
#define h8_opcodes ops
#define DEFINE_TABLE
#include "opcode/h8300.h"
#include "inst.h"
+/* The rate at which to call the host's poll_quit callback. */
+
+#define POLL_QUIT_INTERVAL 0x80000
+
#define LOW_BYTE(x) ((x) & 0xff)
-#define HIGH_BYTE(x) (((x)>>8) & 0xff)
-#define P(X,Y) ((X<<8) | Y)
+#define HIGH_BYTE(x) (((x) >> 8) & 0xff)
+#define P(X,Y) ((X << 8) | Y)
+
+#define BUILDSR() \
+ cpu.ccr = ((I << 7) | (UI << 6) | (H << 5) | (U << 4) \
+ | (N << 3) | (Z << 2) | (V << 1) | C);
-#define BUILDSR() cpu.ccr = (N << 3) | (Z << 2) | (V<<1) | C;
+#define BUILDEXR() \
+ if (h8300smode) cpu.exr = (trace<<7) | intMask;
#define GETSR() \
c = (cpu.ccr >> 0) & 1;\
v = (cpu.ccr >> 1) & 1;\
nz = !((cpu.ccr >> 2) & 1);\
- n = (cpu.ccr >> 3) & 1;
+ n = (cpu.ccr >> 3) & 1;\
+ u = (cpu.ccr >> 4) & 1;\
+ h = (cpu.ccr >> 5) & 1;\
+ ui = ((cpu.ccr >> 6) & 1);\
+ intMaskBit = (cpu.ccr >> 7) & 1;
+
+#define GETEXR() \
+ if (h8300smode) \
+ { \
+ trace = (cpu.exr >> 7) & 1; \
+ intMask = cpu.exr & 7; \
+ }
#ifdef __CHAR_IS_SIGNED__
-#define SEXTCHAR(x) ((char)(x))
+#define SEXTCHAR(x) ((char) (x))
#endif
#ifndef SEXTCHAR
-#define SEXTCHAR(x) ((x & 0x80) ? (x | ~0xff):x)
+#define SEXTCHAR(x) ((x & 0x80) ? (x | ~0xff) : x & 0xff)
#endif
#define UEXTCHAR(x) ((x) & 0xff)
#define UEXTSHORT(x) ((x) & 0xffff)
-#define SEXTSHORT(x) ((short)(x))
+#define SEXTSHORT(x) ((short) (x))
static cpu_state_type cpu;
int h8300hmode = 0;
+int h8300smode = 0;
+static int memory_size;
static int
-get_now ()
+get_now (void)
{
- struct tms b;
-
- return time (0);
-#if 0
- times (&b);
- return b.tms_utime + b.tms_stime;
-#endif
+ return time (0); /* WinXX HAS UNIX like 'time', so why not using it? */
}
static int
-now_persec ()
+now_persec (void)
{
return 1;
}
-
static int
-bitfrom (x)
+bitfrom (int x)
{
switch (x & SIZE)
{
}
}
-static
-unsigned int
-lvalue (x, rn)
+static unsigned int
+lvalue (int x, int rn)
{
switch (x / 4)
{
return X (OP_REG, SP);
case OP_MEM:
-
return X (OP_MEM, SP);
+
default:
- abort ();
+ abort (); /* ?? May be something more usefull? */
}
}
-static unsigned int
-decode (addr, data, dst)
- int addr;
- unsigned char *data;
- decoded_inst *dst;
+static int
+cmdline_location()
+{
+ if (h8300smode)
+ return 0xffff00L;
+ else if (h8300hmode)
+ return 0x2ff00L;
+ else
+ return 0xff00L;
+}
+static unsigned int
+decode (int addr, unsigned char *data, decoded_inst *dst)
{
int rs = 0;
int rd = 0;
int rdisp = 0;
int abs = 0;
+ int bit = 0;
int plen = 0;
-
- struct h8_opcode *q = h8_opcodes;
+ struct h8_opcode *q;
int size = 0;
+
dst->dst.type = -1;
dst->src.type = -1;
- /* Find the exact opcode/arg combo */
- while (q->name)
+
+ /* Find the exact opcode/arg combo. */
+ for (q = h8_opcodes; q->name; q++)
{
- op_type *nib;
+ op_type *nib = q->data.nib;
unsigned int len = 0;
- nib = q->data.nib;
-
while (1)
{
op_type looking_for = *nib;
{
if (!(((int) thisnib & 0x8) != 0))
goto fail;
- looking_for = (op_type) ((int) looking_for & ~(int)
- B31);
+
+ looking_for = (op_type) ((int) looking_for & ~(int) B31);
thisnib &= 0x7;
}
+
if ((int) looking_for & (int) B30)
{
if (!(((int) thisnib & 0x8) == 0))
goto fail;
+
looking_for = (op_type) ((int) looking_for & ~(int) B30);
}
+
if (looking_for & DBIT)
{
- if ((looking_for & 5) != (thisnib & 5))
+ /* Exclude adds/subs by looking at bit 0 and 2, and
+ make sure the operand size, either w or l,
+ matches by looking at bit 1. */
+ if ((looking_for & 7) != (thisnib & 7))
goto fail;
+
abs = (thisnib & 0x8) ? 2 : 1;
}
else if (looking_for & (REG | IND | INC | DEC))
{
if (looking_for & REG)
{
- /*
- * Can work out size from the
- * register
- */
+ /* Can work out size from the register. */
size = bitfrom (looking_for);
}
if (looking_for & SRC)
- {
- rs = thisnib;
- }
+ rs = thisnib;
else
- {
- rd = thisnib;
- }
+ rd = thisnib;
}
else if (looking_for & L_16)
{
}
else if (looking_for & ABSJMP)
{
- abs =
- (data[1] << 16)
- | (data[2] << 8)
- | (data[3]);
+ abs = (data[1] << 16) | (data[2] << 8) | (data[3]);
}
else if (looking_for & MEMIND)
{
else if (looking_for & L_32)
{
int i = len >> 1;
+
abs = (data[i] << 24)
| (data[i + 1] << 16)
| (data[i + 2] << 8)
else if (looking_for & L_24)
{
int i = len >> 1;
+
abs = (data[i] << 16) | (data[i + 1] << 8) | (data[i + 2]);
plen = 24;
}
else if (looking_for & IGNORE)
{
- /* nothing to do */
+ ;
}
else if (looking_for & DISPREG)
{
case 0:
abs = 1;
break;
+ default:
+ goto fail;
}
}
else if (looking_for & L_8)
{
abs = SEXTCHAR (data[len >> 1]);
}
+ else if (looking_for & ABS8MEM)
+ {
+ plen = 8;
+ abs = h8300hmode ? ~0xff0000ff : ~0xffff00ff;
+ abs |= data[len >> 1] & 0xff;
+ }
else
{
abs = data[len >> 1] & 0xff;
{
plen = 3;
- abs = thisnib;
+ bit = thisnib;
}
else if (looking_for == E)
{
dst->op = q;
- /* Fill in the args */
+ /* Fill in the args. */
{
op_type *args = q->args.nib;
int hadone = 0;
ea_type *p;
if (x & DST)
- {
- p = &(dst->dst);
- }
+ p = &(dst->dst);
else
+ p = &(dst->src);
+
+ if (x & L_3)
{
- p = &(dst->src);
+ p->type = X (OP_IMM, size);
+ p->literal = bit;
}
-
- if (x & (IMM | KBIT | DBIT))
+ else if (x & (IMM | KBIT | DBIT))
{
p->type = X (OP_IMM, size);
p->literal = abs;
}
else if (x & REG)
{
- /* Reset the size, some
- ops (like mul) have two sizes */
+ /* Reset the size.
+ Some ops (like mul) have two sizes. */
size = bitfrom (x);
p->type = X (OP_REG, size);
p->reg = rn & 0x7;
p->literal = 0;
}
- else if (x & (ABS | ABSJMP | ABSMOV))
+ else if (x & (ABS | ABSJMP | ABS8MEM))
{
p->type = X (OP_DISP, size);
p->literal = abs;
{
p->type = OP_CCR;
}
+ else if (x & EXR)
+ {
+ p->type = OP_EXR;
+ }
else
printf ("Hmmmm %x", x);
}
}
- /*
- * But a jmp or a jsr gets
- * automagically lvalued, since we
- * branch to their address not their
- * contents
- */
+ /* But a jmp or a jsr gets automagically lvalued,
+ since we branch to their address not their
+ contents. */
if (q->how == O (O_JSR, SB)
|| q->how == O (O_JMP, SB))
{
dst->opcode = q->how;
dst->cycles = q->time;
- /* And a jsr to 0xc4 is turned into a magic trap */
+ /* And a jsr to these locations are turned into magic
+ traps. */
if (dst->opcode == O (O_JSR, SB))
{
- if (dst->src.literal == 0xc4)
+ switch (dst->src.literal)
{
- dst->opcode = O (O_SYSCALL, SB);
+ case 0xc5:
+ dst->opcode = O (O_SYS_OPEN, SB);
+ break;
+ case 0xc6:
+ dst->opcode = O (O_SYS_READ, SB);
+ break;
+ case 0xc7:
+ dst->opcode = O (O_SYS_WRITE, SB);
+ break;
+ case 0xc8:
+ dst->opcode = O (O_SYS_LSEEK, SB);
+ break;
+ case 0xc9:
+ dst->opcode = O (O_SYS_CLOSE, SB);
+ break;
+ case 0xca:
+ dst->opcode = O (O_SYS_STAT, SB);
+ break;
+ case 0xcb:
+ dst->opcode = O (O_SYS_FSTAT, SB);
+ break;
+ case 0xcc:
+ dst->opcode = O (O_SYS_CMDLINE, SB);
+ break;
}
+ /* End of Processing for system calls. */
}
dst->next_pc = addr + len / 2;
return;
}
else
- {
- printf ("Dont understand %x \n", looking_for);
- }
+ printf ("Don't understand %x \n", looking_for);
}
len++;
}
fail:
- q++;
+ ;
}
+ /* Fell off the end. */
dst->opcode = O (O_ILL, SB);
}
-
static void
-compile (pc)
+compile (int pc)
{
int idx;
- /* find the next cache entry to use */
-
+ /* Find the next cache entry to use. */
idx = cpu.cache_top + 1;
cpu.compiles++;
if (idx >= cpu.csize)
}
cpu.cache_top = idx;
- /* Throw away its old meaning */
+ /* Throw away its old meaning. */
cpu.cache_idx[cpu.cache[idx].oldpc] = 0;
- /* set to new address */
+ /* Set to new address. */
cpu.cache[idx].oldpc = pc;
- /* fill in instruction info */
+ /* Fill in instruction info. */
decode (pc, cpu.memory + pc, cpu.cache + idx);
- /* point to new cache entry */
+ /* Point to new cache entry. */
cpu.cache_idx[pc] = idx;
}
#define SET_L_REG(x,y) (*(lreg[x])) = (y)
#define GET_MEMORY_L(x) \
- ((cpu.memory[x+0] << 24) | (cpu.memory[x+1] << 16) | (cpu.memory[x+2] << 8) | cpu.memory[x+3])
+ (x < memory_size \
+ ? ((cpu.memory[x+0] << 24) | (cpu.memory[x+1] << 16) \
+ | (cpu.memory[x+2] << 8) | cpu.memory[x+3]) \
+ : ((cpu.eightbit[(x+0) & 0xff] << 24) | (cpu.eightbit[(x+1) & 0xff] << 16) \
+ | (cpu.eightbit[(x+2) & 0xff] << 8) | cpu.eightbit[(x+3) & 0xff]))
#define GET_MEMORY_W(x) \
- ((cpu.memory[x+0] << 8) | (cpu.memory[x+1] << 0))
+ (x < memory_size \
+ ? ((cpu.memory[x+0] << 8) | (cpu.memory[x+1] << 0)) \
+ : ((cpu.eightbit[(x+0) & 0xff] << 8) | (cpu.eightbit[(x+1) & 0xff] << 0)))
-#define SET_MEMORY_B(x,y) \
- (cpu.memory[(x)] = y)
-
-#define SET_MEMORY_W(x,y) \
-{register unsigned char *_p = cpu.memory+x;\
- register int __y = y;\
- _p[0] = (__y)>>8;\
- _p[1] =(__y); }
+#define GET_MEMORY_B(x) \
+ (x < memory_size ? (cpu.memory[x]) : (cpu.eightbit[x & 0xff]))
#define SET_MEMORY_L(x,y) \
-{register unsigned char *_p = cpu.memory+x;register int __y = y;\
- _p[0] = (__y)>>24; _p[1] = (__y)>>16; _p[2] = (__y)>>8; _p[3] = (__y)>>0;}
+{ register unsigned char *_p; register int __y = y; \
+ _p = (x < memory_size ? cpu.memory+x : cpu.eightbit + (x & 0xff)); \
+ _p[0] = (__y)>>24; _p[1] = (__y)>>16; \
+ _p[2] = (__y)>>8; _p[3] = (__y)>>0;}
-#define GET_MEMORY_B(x) (cpu.memory[x])
+#define SET_MEMORY_W(x,y) \
+{ register unsigned char *_p; register int __y = y; \
+ _p = (x < memory_size ? cpu.memory+x : cpu.eightbit + (x & 0xff)); \
+ _p[0] = (__y)>>8; _p[1] =(__y);}
-int
-fetch (arg, n)
- ea_type *arg;
+#define SET_MEMORY_B(x,y) \
+ (x < memory_size ? (cpu.memory[(x)] = y) : (cpu.eightbit[x & 0xff] = y))
+
+static int
+fetch (ea_type *arg)
{
int rn = arg->reg;
int abs = arg->literal;
t &= cpu.mask;
return t;
+ case X (OP_MEM, SW):
+ t = GET_MEMORY_W (abs);
+ t &= cpu.mask;
+ return t;
+
default:
- abort ();
+ abort (); /* ?? May be something more usefull? */
}
}
-static
-void
-store (arg, n)
- ea_type *arg;
- int n;
+static void
+store (ea_type *arg, int n)
{
int rn = arg->reg;
int abs = arg->literal;
littleendian;
-static
-void
-init_pointers ()
+static void
+init_pointers (void)
{
static int init;
init = 1;
littleendian.i = 1;
- cpu.memory = (unsigned char *) calloc (sizeof (char), MSIZE);
- cpu.cache_idx = (unsigned short *) calloc (sizeof (short), MSIZE);
- cpu.mask = (1 << MPOWER) - 1;
+ if (h8300smode)
+ memory_size = H8300S_MSIZE;
+ else if (h8300hmode)
+ memory_size = H8300H_MSIZE;
+ else
+ memory_size = H8300_MSIZE;
+ cpu.memory = (unsigned char *) calloc (sizeof (char), memory_size);
+ cpu.cache_idx = (unsigned short *) calloc (sizeof (short), memory_size);
+ cpu.eightbit = (unsigned char *) calloc (sizeof (char), 256);
+
+ /* `msize' must be a power of two. */
+ if ((memory_size & (memory_size - 1)) != 0)
+ abort ();
+ cpu.mask = memory_size - 1;
for (i = 0; i < 9; i++)
{
}
p++;
}
+ wreg[i] = wreg[i + 8] = 0;
while (q < u)
{
if (*q == 0x2233)
}
q++;
}
+ if (wreg[i] == 0 || wreg[i + 8] == 0)
+ abort ();
cpu.regs[i] = 0;
lreg[i] = &cpu.regs[i];
}
lreg[8] = &cpu.regs[8];
- /* initialize the seg registers */
+ /* Initialize the seg registers. */
if (!cpu.cache)
- sim_csize (CSIZE);
+ sim_set_simcache_size (CSIZE);
}
}
static void
-control_c (sig, code, scp, addr)
- int sig;
- int code;
- char *scp;
- char *addr;
+control_c (int sig)
{
+ cpu.state = SIM_STATE_STOPPED;
cpu.exception = SIGINT;
}
#define Z (nz == 0)
#define V (v != 0)
#define N (n != 0)
+#define U (u != 0)
+#define H (h != 0)
+#define UI (ui != 0)
+#define I (intMaskBit != 0)
static int
-mop (code, bsize, sign)
- decoded_inst *code;
- int bsize;
- int sign;
+mop (decoded_inst *code, int bsize, int sign)
{
int multiplier;
int multiplicand;
{
SET_L_REG (code->dst.reg, result);
}
-/* return ((n==1) << 1) | (nz==1); */
-
+#if 0
+ return ((n == 1) << 1) | (nz == 1);
+#endif
}
-#define OSHIFTS(name, how) \
-case O(name, SB): \
+#define ONOT(name, how) \
+case O (name, SB): \
{ \
int t; \
int hm = 0x80; \
how; \
goto shift8; \
} \
-case O(name, SW): \
+case O (name, SW): \
{ \
int t; \
int hm = 0x8000; \
how; \
goto shift16; \
} \
-case O(name, SL): \
+case O (name, SL): \
{ \
int t; \
int hm = 0x80000000; \
goto shift32; \
}
+#define OSHIFTS(name, how1, how2) \
+case O (name, SB): \
+{ \
+ int t; \
+ int hm = 0x80; \
+ rd = GET_B_REG (code->src.reg); \
+ if ((GET_MEMORY_B (pc + 1) & 0x40) == 0) \
+ { \
+ how1; \
+ } \
+ else \
+ { \
+ how2; \
+ } \
+ goto shift8; \
+} \
+case O (name, SW): \
+{ \
+ int t; \
+ int hm = 0x8000; \
+ rd = GET_W_REG (code->src.reg); \
+ if ((GET_MEMORY_B (pc + 1) & 0x40) == 0) \
+ { \
+ how1; \
+ } \
+ else \
+ { \
+ how2; \
+ } \
+ goto shift16; \
+} \
+case O (name, SL): \
+{ \
+ int t; \
+ int hm = 0x80000000; \
+ rd = GET_L_REG (code->src.reg); \
+ if ((GET_MEMORY_B (pc + 1) & 0x40) == 0) \
+ { \
+ how1; \
+ } \
+ else \
+ { \
+ how2; \
+ } \
+ goto shift32; \
+}
+
#define OBITOP(name,f, s, op) \
-case O(name, SB): \
+case O (name, SB): \
{ \
int m; \
int b; \
if (f) ea = fetch (&code->dst); \
- m=1<< fetch(&code->src); \
+ m=1<< fetch (&code->src); \
op; \
- if(s) store (&code->dst,ea); goto next; \
+ if (s) store (&code->dst,ea); goto next; \
}
int
-sim_resume (step, siggnal)
+sim_stop (SIM_DESC sd)
+{
+ cpu.state = SIM_STATE_STOPPED;
+ cpu.exception = SIGINT;
+ return 1;
+}
+
+#define R0_REGNUM 0
+#define R1_REGNUM 1
+#define R2_REGNUM 2
+#define R3_REGNUM 3
+#define R4_REGNUM 4
+#define R5_REGNUM 5
+#define R6_REGNUM 6
+#define R7_REGNUM 7
+
+#define SP_REGNUM R7_REGNUM /* Contains address of top of stack */
+#define FP_REGNUM R6_REGNUM /* Contains address of executing
+ * stack frame */
+
+#define CCR_REGNUM 8 /* Contains processor status */
+#define PC_REGNUM 9 /* Contains program counter */
+
+#define CYCLE_REGNUM 10
+
+#define EXR_REGNUM 11
+#define INST_REGNUM 12
+#define TICK_REGNUM 13
+
+void
+sim_resume (SIM_DESC sd, int step, int siggnal)
{
static int init1;
int cycles = 0;
int ea;
int bit;
int pc;
- int c, nz, v, n;
-
+ int c, nz, v, n, u, h, ui, intMaskBit;
+ int trace, intMask;
+ int oldmask;
init_pointers ();
prev = signal (SIGINT, control_c);
if (step)
{
+ cpu.state = SIM_STATE_STOPPED;
cpu.exception = SIGTRAP;
}
else
{
+ cpu.state = SIM_STATE_RUNNING;
cpu.exception = 0;
}
pc = cpu.pc;
+ /* The PC should never be odd. */
+ if (pc & 0x1)
+ abort ();
+
GETSR ();
+ GETEXR ();
+ oldmask = cpu.mask;
+ if (!h8300hmode)
+ cpu.mask = 0xffff;
do
{
int cidx;
#define ALUOP(STORE, NAME, HOW) \
- case O(NAME,SB): HOW; if(STORE)goto alu8;else goto just_flags_alu8; \
- case O(NAME, SW): HOW; if(STORE)goto alu16;else goto just_flags_alu16; \
- case O(NAME,SL): HOW; if(STORE)goto alu32;else goto just_flags_alu32;
+ case O (NAME, SB): HOW; if (STORE) goto alu8; else goto just_flags_alu8; \
+ case O (NAME, SW): HOW; if (STORE) goto alu16; else goto just_flags_alu16; \
+ case O (NAME, SL): HOW; if (STORE) goto alu32; else goto just_flags_alu32;
-#define LOGOP(NAME, HOW) \
- case O(NAME,SB): HOW; goto log8;\
- case O(NAME, SW): HOW; goto log16;\
- case O(NAME,SL): HOW; goto log32;
+#define LOGOP(NAME, HOW) \
+ case O (NAME, SB): HOW; goto log8; \
+ case O (NAME, SW): HOW; goto log16; \
+ case O (NAME, SL): HOW; goto log32;
#endif
- cycles += code->cycles;
- insts++;
+ if (code->opcode)
+ {
+ cycles += code->cycles;
+ insts++;
+ }
+
switch (code->opcode)
{
case 0:
res = rd + ea;
goto alu8;
-#define EA ea = fetch(&code->src);
-#define RD_EA ea = fetch(&code->src); rd = fetch(&code->dst);
+#define EA ea = fetch (&code->src);
+#define RD_EA ea = fetch (&code->src); rd = fetch (&code->dst);
ALUOP (1, O_SUB, RD_EA;
ea = -ea;
SET_L_REG (code->dst.reg, res);
goto just_flags_log32;
+ case O (O_EEPMOV, SB):
+ case O (O_EEPMOV, SW):
+ if (h8300hmode || h8300smode)
+ {
+ register unsigned char *_src, *_dst;
+ unsigned int count = ((code->opcode == O (O_EEPMOV, SW))
+ ? cpu.regs[R4_REGNUM] & 0xffff
+ : cpu.regs[R4_REGNUM] & 0xff);
+
+ _src = (cpu.regs[R5_REGNUM] < memory_size
+ ? cpu.memory + cpu.regs[R5_REGNUM]
+ : cpu.eightbit + (cpu.regs[R5_REGNUM] & 0xff));
+ if ((_src + count) >= (cpu.memory + memory_size))
+ {
+ if ((_src + count) >= (cpu.eightbit + 0x100))
+ goto illegal;
+ }
+ _dst = (cpu.regs[R6_REGNUM] < memory_size
+ ? cpu.memory + cpu.regs[R6_REGNUM]
+ : cpu.eightbit + (cpu.regs[R6_REGNUM] & 0xff));
+ if ((_dst + count) >= (cpu.memory + memory_size))
+ {
+ if ((_dst + count) >= (cpu.eightbit + 0x100))
+ goto illegal;
+ }
+ memcpy (_dst, _src, count);
+
+ cpu.regs[R5_REGNUM] += count;
+ cpu.regs[R6_REGNUM] += count;
+ cpu.regs[R4_REGNUM] &= ((code->opcode == O (O_EEPMOV, SW))
+ ? (~0xffff) : (~0xff));
+ cycles += 2 * count;
+ goto next;
+ }
+ goto illegal;
case O (O_ADDS, SL):
SET_L_REG (code->dst.reg,
SET_L_REG (code->dst.reg, res);
goto just_flags_inc32;
-
#define GET_CCR(x) BUILDSR();x = cpu.ccr
+#define GET_EXR(x) BUILDEXR ();x = cpu.exr
+
+ case O (O_LDC, SB):
+ case O (O_LDC, SW):
+ res = fetch (&code->src);
+ goto setc;
+ case O (O_STC, SB):
+ case O (O_STC, SW):
+ if (code->src.type == OP_CCR)
+ {
+ GET_CCR (res);
+ }
+ else if (code->src.type == OP_EXR && h8300smode)
+ {
+ GET_EXR (res);
+ }
+ else
+ goto illegal;
+ store (&code->dst, res);
+ goto next;
case O (O_ANDC, SB):
- GET_CCR (rd);
+ if (code->dst.type == OP_CCR)
+ {
+ GET_CCR (rd);
+ }
+ else if (code->dst.type == OP_EXR && h8300smode)
+ {
+ GET_EXR (rd);
+ }
+ else
+ goto illegal;
ea = code->src.literal;
res = rd & ea;
goto setc;
case O (O_ORC, SB):
- GET_CCR (rd);
+ if (code->dst.type == OP_CCR)
+ {
+ GET_CCR (rd);
+ }
+ else if (code->dst.type == OP_EXR && h8300smode)
+ {
+ GET_EXR (rd);
+ }
+ else
+ goto illegal;
ea = code->src.literal;
res = rd | ea;
goto setc;
case O (O_XORC, SB):
- GET_CCR (rd);
+ if (code->dst.type == OP_CCR)
+ {
+ GET_CCR (rd);
+ }
+ else if (code->dst.type == OP_EXR && h8300smode)
+ {
+ GET_EXR (rd);
+ }
+ else
+ goto illegal;
ea = code->src.literal;
res = rd ^ ea;
goto setc;
goto condtrue;
goto next;
- case O (O_SYSCALL, SB):
- printf ("%c", cpu.regs[2]);
+ /* Trap for Command Line setup. */
+ case O (O_SYS_CMDLINE, SB):
+ {
+ int i = 0; /* Loop counter. */
+ int j = 0; /* Loop counter. */
+ int ind_arg_len = 0; /* Length of each argument. */
+ int no_of_args = 0; /* The no. or cmdline args. */
+ int current_location = 0; /* Location of string. */
+ int old_sp = 0; /* The Initial Stack Pointer. */
+ int no_of_slots = 0; /* No. of slots required on the stack
+ for storing cmdline args. */
+ int sp_move = 0; /* No. of locations by which the stack needs
+ to grow. */
+ int new_sp = 0; /* The final stack pointer location passed
+ back. */
+ int *argv_ptrs; /* Pointers of argv strings to be stored. */
+ int argv_ptrs_location = 0; /* Location of pointers to cmdline
+ args on the stack. */
+ int char_ptr_size = 0; /* Size of a character pointer on
+ target machine. */
+ int addr_cmdline = 0; /* Memory location where cmdline has
+ to be stored. */
+ int size_cmdline = 0; /* Size of cmdline. */
+
+ /* Set the address of 256 free locations where command line is
+ stored. */
+ addr_cmdline = cmdline_location();
+ cpu.regs[0] = addr_cmdline;
+
+ /* Counting the no. of commandline arguments. */
+ for (i = 0; ptr_command_line[i] != NULL; i++)
+ continue;
+
+ /* No. of arguments in the command line. */
+ no_of_args = i;
+
+ /* Current location is just a temporary variable,which we are
+ setting to the point to the start of our commandline string. */
+ current_location = addr_cmdline;
+
+ /* Allocating space for storing pointers of the command line
+ arguments. */
+ argv_ptrs = (int *) malloc (sizeof (int) * no_of_args);
+
+ /* Setting char_ptr_size to the sizeof (char *) on the different
+ architectures. */
+ if (h8300hmode || h8300smode)
+ {
+ char_ptr_size = 4;
+ }
+ else
+ {
+ char_ptr_size = 2;
+ }
+
+ for (i = 0; i < no_of_args; i++)
+ {
+ ind_arg_len = 0;
+
+ /* The size of the commandline argument. */
+ ind_arg_len = (strlen (ptr_command_line[i]) + 1);
+
+ /* The total size of the command line string. */
+ size_cmdline += ind_arg_len;
+
+ /* As we have only 256 bytes, we need to provide a graceful
+ exit. Anyways, a program using command line arguments
+ where we cannot store all the command line arguments
+ given may behave unpredictably. */
+ if (size_cmdline >= 256)
+ {
+ cpu.regs[0] = 0;
+ goto next;
+ }
+ else
+ {
+ /* current_location points to the memory where the next
+ commandline argument is stored. */
+ argv_ptrs[i] = current_location;
+ for (j = 0; j < ind_arg_len; j++)
+ {
+ SET_MEMORY_B ((current_location +
+ (sizeof (char) * j)),
+ *(ptr_command_line[i] +
+ sizeof (char) * j));
+ }
+
+ /* Setting current_location to the starting of next
+ argument. */
+ current_location += ind_arg_len;
+ }
+ }
+
+ /* This is the original position of the stack pointer. */
+ old_sp = cpu.regs[7];
+
+ /* We need space from the stack to store the pointers to argvs. */
+ /* As we will infringe on the stack, we need to shift the stack
+ pointer so that the data is not overwritten. We calculate how
+ much space is required. */
+ sp_move = (no_of_args) * (char_ptr_size);
+
+ /* The final position of stack pointer, we have thus taken some
+ space from the stack. */
+ new_sp = old_sp - sp_move;
+
+ /* Temporary variable holding value where the argv pointers need
+ to be stored. */
+ argv_ptrs_location = new_sp;
+
+ /* The argv pointers are stored at sequential locations. As per
+ the H8300 ABI. */
+ for (i = 0; i < no_of_args; i++)
+ {
+ /* Saving the argv pointer. */
+ if (h8300hmode || h8300smode)
+ {
+ SET_MEMORY_L (argv_ptrs_location, argv_ptrs[i]);
+ }
+ else
+ {
+ SET_MEMORY_W (argv_ptrs_location, argv_ptrs[i]);
+ }
+
+ /* The next location where the pointer to the next argv
+ string has to be stored. */
+ argv_ptrs_location += char_ptr_size;
+ }
+
+ /* Required by POSIX, Setting 0x0 at the end of the list of argv
+ pointers. */
+ if (h8300hmode || h8300smode)
+ {
+ SET_MEMORY_L (old_sp, 0x0);
+ }
+ else
+ {
+ SET_MEMORY_W (old_sp, 0x0);
+ }
+
+ /* Freeing allocated memory. */
+ free (argv_ptrs);
+ for (i = 0; i <= no_of_args; i++)
+ {
+ free (ptr_command_line[i]);
+ }
+ free (ptr_command_line);
+
+ /* The no. of argv arguments are returned in Reg 0. */
+ cpu.regs[0] = no_of_args;
+ /* The Pointer to argv in Register 1. */
+ cpu.regs[1] = new_sp;
+ /* Setting the stack pointer to the new value. */
+ cpu.regs[7] = new_sp;
+ }
+ goto next;
+
+ /* System call processing starts. */
+ case O (O_SYS_OPEN, SB):
+ {
+ int len = 0; /* Length of filename. */
+ char *filename; /* Filename would go here. */
+ char temp_char; /* Temporary character */
+ int mode = 0; /* Mode bits for the file. */
+ int open_return; /* Return value of open, file descriptor. */
+ int i; /* Loop counter */
+ int filename_ptr; /* Pointer to filename in cpu memory. */
+
+ /* Setting filename_ptr to first argument of open. */
+ filename_ptr = h8300hmode ? GET_L_REG (0) : GET_W_REG (0);
+
+ /* Trying to get mode. */
+ if (h8300hmode || h8300smode)
+ {
+ mode = GET_MEMORY_L (cpu.regs[7] + 4);
+ }
+ else
+ {
+ mode = GET_MEMORY_W (cpu.regs[7] + 2);
+ }
+
+ /* Trying to find the length of the filename. */
+ temp_char = GET_MEMORY_B (cpu.regs[0]);
+
+ len = 1;
+ while (temp_char != '\0')
+ {
+ temp_char = GET_MEMORY_B (filename_ptr + len);
+ len++;
+ }
+
+ /* Allocating space for the filename. */
+ filename = (char *) malloc (sizeof (char) * len);
+
+ /* String copying the filename from memory. */
+ for (i = 0; i < len; i++)
+ {
+ temp_char = GET_MEMORY_B (filename_ptr + i);
+ filename[i] = temp_char;
+ }
+
+ /* Callback to open and return the file descriptor. */
+ open_return = sim_callback->open (sim_callback, filename, mode);
+
+ /* Return value in register 0. */
+ cpu.regs[0] = open_return;
+
+ /* Freeing memory used for filename. */
+ free (filename);
+ }
+ goto next;
+
+ case O (O_SYS_READ, SB):
+ {
+ char *char_ptr; /* Where characters read would be stored. */
+ int fd; /* File descriptor */
+ int buf_size; /* BUF_SIZE parameter in read. */
+ int i = 0; /* Temporary Loop counter */
+ int read_return = 0; /* Return value from callback to
+ read. */
+
+ fd = h8300hmode ? GET_L_REG (0) : GET_W_REG (0);
+ buf_size = h8300hmode ? GET_L_REG (2) : GET_W_REG (2);
+
+ char_ptr = (char *) malloc (sizeof (char) * buf_size);
+
+ /* Callback to read and return the no. of characters read. */
+ read_return =
+ sim_callback->read (sim_callback, fd, char_ptr, buf_size);
+
+ /* The characters read are stored in cpu memory. */
+ for (i = 0; i < buf_size; i++)
+ {
+ SET_MEMORY_B ((cpu.regs[1] + (sizeof (char) * i)),
+ *(char_ptr + (sizeof (char) * i)));
+ }
+
+ /* Return value in Register 0. */
+ cpu.regs[0] = read_return;
+
+ /* Freeing memory used as buffer. */
+ free (char_ptr);
+ }
+ goto next;
+
+ case O (O_SYS_WRITE, SB):
+ {
+ int fd; /* File descriptor */
+ char temp_char; /* Temporary character */
+ int len; /* Length of write, Parameter II to write. */
+ int char_ptr; /* Character Pointer, Parameter I of write. */
+ char *ptr; /* Where characters to be written are stored.
+ */
+ int write_return; /* Return value from callback to write. */
+ int i = 0; /* Loop counter */
+
+ fd = h8300hmode ? GET_L_REG (0) : GET_W_REG (0);
+ char_ptr = h8300hmode ? GET_L_REG (1) : GET_W_REG (1);
+ len = h8300hmode ? GET_L_REG (2) : GET_W_REG (2);
+
+ /* Allocating space for the characters to be written. */
+ ptr = (char *) malloc (sizeof (char) * len);
+
+ /* Fetching the characters from cpu memory. */
+ for (i = 0; i < len; i++)
+ {
+ temp_char = GET_MEMORY_B (char_ptr + i);
+ ptr[i] = temp_char;
+ }
+
+ /* Callback write and return the no. of characters written. */
+ write_return = sim_callback->write (sim_callback, fd, ptr, len);
+
+ /* Return value in Register 0. */
+ cpu.regs[0] = write_return;
+
+ /* Freeing memory used as buffer. */
+ free (ptr);
+ }
+ goto next;
+
+ case O (O_SYS_LSEEK, SB):
+ {
+ int fd; /* File descriptor */
+ int offset; /* Offset */
+ int origin; /* Origin */
+ int lseek_return; /* Return value from callback to lseek. */
+
+ fd = h8300hmode ? GET_L_REG (0) : GET_W_REG (0);
+ offset = h8300hmode ? GET_L_REG (1) : GET_W_REG (1);
+ origin = h8300hmode ? GET_L_REG (2) : GET_W_REG (2);
+
+ /* Callback lseek and return offset. */
+ lseek_return =
+ sim_callback->lseek (sim_callback, fd, offset, origin);
+
+ /* Return value in register 0. */
+ cpu.regs[0] = lseek_return;
+ }
+ goto next;
+
+ case O (O_SYS_CLOSE, SB):
+ {
+ int fd; /* File descriptor */
+ int close_return; /* Return value from callback to close. */
+
+ fd = h8300hmode ? GET_L_REG (0) : GET_W_REG (0);
+
+ /* Callback close and return. */
+ close_return = sim_callback->close (sim_callback, fd);
+
+ /* Return value in register 0. */
+ cpu.regs[0] = close_return;
+ }
+ goto next;
+
+ case O (O_SYS_FSTAT, SB):
+ {
+ int fd; /* File descriptor */
+ struct stat stat_rec; /* Stat record */
+ int fstat_return; /* Return value from callback to stat. */
+ int stat_ptr; /* Pointer to stat record. */
+ char *temp_stat_ptr; /* Temporary stat_rec pointer. */
+
+ fd = h8300hmode ? GET_L_REG (0) : GET_W_REG (0);
+
+ /* Setting stat_ptr to second argument of stat. */
+ stat_ptr = h8300hmode ? GET_L_REG (1) : GET_W_REG (1);
+
+ /* Callback stat and return. */
+ fstat_return = sim_callback->fstat (sim_callback, fd, &stat_rec);
+
+ /* Have stat_ptr point to starting of stat_rec. */
+ temp_stat_ptr = (char *) (&stat_rec);
+
+ /* Setting up the stat structure returned. */
+ SET_MEMORY_W (stat_ptr, stat_rec.st_dev);
+ stat_ptr += 2;
+ SET_MEMORY_W (stat_ptr, stat_rec.st_ino);
+ stat_ptr += 2;
+ SET_MEMORY_L (stat_ptr, stat_rec.st_mode);
+ stat_ptr += 4;
+ SET_MEMORY_W (stat_ptr, stat_rec.st_nlink);
+ stat_ptr += 2;
+ SET_MEMORY_W (stat_ptr, stat_rec.st_uid);
+ stat_ptr += 2;
+ SET_MEMORY_W (stat_ptr, stat_rec.st_gid);
+ stat_ptr += 2;
+ SET_MEMORY_W (stat_ptr, stat_rec.st_rdev);
+ stat_ptr += 2;
+ SET_MEMORY_L (stat_ptr, stat_rec.st_size);
+ stat_ptr += 4;
+ SET_MEMORY_L (stat_ptr, stat_rec.st_atime);
+ stat_ptr += 8;
+ SET_MEMORY_L (stat_ptr, stat_rec.st_mtime);
+ stat_ptr += 8;
+ SET_MEMORY_L (stat_ptr, stat_rec.st_ctime);
+
+ /* Return value in register 0. */
+ cpu.regs[0] = fstat_return;
+ }
goto next;
- OSHIFTS (O_NOT, rd = ~rd);
- OSHIFTS (O_SHLL, c = rd & hm;
- rd <<= 1);
- OSHIFTS (O_SHLR, c = rd & 1;
- rd = (unsigned int) rd >> 1);
- OSHIFTS (O_SHAL, c = rd & hm;
- rd <<= 1);
- OSHIFTS (O_SHAR, t = rd & hm;
- c = rd & 1;
- rd >>= 1;
- rd |= t;
- );
- OSHIFTS (O_ROTL, c = rd & hm;
- rd <<= 1;
- rd |= C);
- OSHIFTS (O_ROTR, c = rd & 1;
- rd = (unsigned int) rd >> 1;
- if (c) rd |= hm;);
- OSHIFTS (O_ROTXL, t = rd & hm;
- rd <<= 1;
- rd |= C;
- c = t;
- );
- OSHIFTS (O_ROTXR, t = rd & 1;
- rd = (unsigned int) rd >> 1;
- if (C) rd |= hm; c = t;);
+ case O (O_SYS_STAT, SB):
+ {
+ int len = 0; /* Length of filename. */
+ char *filename; /* Filename would go here. */
+ char temp_char; /* Temporary character */
+ int filename_ptr; /* Pointer to filename in cpu memory. */
+ struct stat stat_rec; /* Stat record */
+ int stat_return; /* Return value from callback to stat */
+ int stat_ptr; /* Pointer to stat record. */
+ char *temp_stat_ptr; /* Temporary stat_rec pointer. */
+ int i = 0; /* Loop Counter */
+
+ /* Setting filename_ptr to first argument of open. */
+ filename_ptr = h8300hmode ? GET_L_REG (0) : GET_W_REG (0);
+
+ /* Trying to find the length of the filename. */
+ temp_char = GET_MEMORY_B (cpu.regs[0]);
+
+ len = 1;
+ while (temp_char != '\0')
+ {
+ temp_char = GET_MEMORY_B (filename_ptr + len);
+ len++;
+ }
+
+ /* Allocating space for the filename. */
+ filename = (char *) malloc (sizeof (char) * len);
+
+ /* String copying the filename from memory. */
+ for (i = 0; i < len; i++)
+ {
+ temp_char = GET_MEMORY_B (filename_ptr + i);
+ filename[i] = temp_char;
+ }
+
+ /* Setting stat_ptr to second argument of stat. */
+ /* stat_ptr = cpu.regs[1]; */
+ stat_ptr = h8300hmode ? GET_L_REG (1) : GET_W_REG (1);
+
+ /* Callback stat and return. */
+ stat_return =
+ sim_callback->stat (sim_callback, filename, &stat_rec);
+
+ /* Have stat_ptr point to starting of stat_rec. */
+ temp_stat_ptr = (char *) (&stat_rec);
+
+ /* Freeing memory used for filename. */
+ free (filename);
+
+ /* Setting up the stat structure returned. */
+ SET_MEMORY_W (stat_ptr, stat_rec.st_dev);
+ stat_ptr += 2;
+ SET_MEMORY_W (stat_ptr, stat_rec.st_ino);
+ stat_ptr += 2;
+ SET_MEMORY_L (stat_ptr, stat_rec.st_mode);
+ stat_ptr += 4;
+ SET_MEMORY_W (stat_ptr, stat_rec.st_nlink);
+ stat_ptr += 2;
+ SET_MEMORY_W (stat_ptr, stat_rec.st_uid);
+ stat_ptr += 2;
+ SET_MEMORY_W (stat_ptr, stat_rec.st_gid);
+ stat_ptr += 2;
+ SET_MEMORY_W (stat_ptr, stat_rec.st_rdev);
+ stat_ptr += 2;
+ SET_MEMORY_L (stat_ptr, stat_rec.st_size);
+ stat_ptr += 4;
+ SET_MEMORY_L (stat_ptr, stat_rec.st_atime);
+ stat_ptr += 8;
+ SET_MEMORY_L (stat_ptr, stat_rec.st_mtime);
+ stat_ptr += 8;
+ SET_MEMORY_L (stat_ptr, stat_rec.st_ctime);
+
+ /* Return value in register 0. */
+ cpu.regs[0] = stat_return;
+ }
+ goto next;
+ /* End of system call processing. */
+
+ ONOT (O_NOT, rd = ~rd; v = 0;);
+ OSHIFTS (O_SHLL,
+ c = rd & hm; v = 0; rd <<= 1,
+ c = rd & (hm >> 1); v = 0; rd <<= 2);
+ OSHIFTS (O_SHLR,
+ c = rd & 1; v = 0; rd = (unsigned int) rd >> 1,
+ c = rd & 2; v = 0; rd = (unsigned int) rd >> 2);
+ OSHIFTS (O_SHAL,
+ c = rd & hm; v = (rd & hm) != ((rd & (hm >> 1)) << 1); rd <<= 1,
+ c = rd & (hm >> 1); v = (rd & (hm >> 1)) != ((rd & (hm >> 2)) << 2); rd <<= 2);
+ OSHIFTS (O_SHAR,
+ t = rd & hm; c = rd & 1; v = 0; rd >>= 1; rd |= t,
+ t = rd & hm; c = rd & 2; v = 0; rd >>= 2; rd |= t | t >> 1);
+ OSHIFTS (O_ROTL,
+ c = rd & hm; v = 0; rd <<= 1; rd |= C,
+ c = rd & hm; v = 0; rd <<= 1; rd |= C; c = rd & hm; rd <<= 1; rd |= C);
+ OSHIFTS (O_ROTR,
+ c = rd & 1; v = 0; rd = (unsigned int) rd >> 1; if (c) rd |= hm,
+ c = rd & 1; v = 0; rd = (unsigned int) rd >> 1; if (c) rd |= hm; c = rd & 1; rd = (unsigned int) rd >> 1; if (c) rd |= hm);
+ OSHIFTS (O_ROTXL,
+ t = rd & hm; rd <<= 1; rd |= C; c = t; v = 0,
+ t = rd & hm; rd <<= 1; rd |= C; c = t; v = 0; t = rd & hm; rd <<= 1; rd |= C; c = t);
+ OSHIFTS (O_ROTXR,
+ t = rd & 1; rd = (unsigned int) rd >> 1; if (C) rd |= hm; c = t; v = 0,
+ t = rd & 1; rd = (unsigned int) rd >> 1; if (C) rd |= hm; c = t; v = 0; t = rd & 1; rd = (unsigned int) rd >> 1; if (C) rd |= hm; c = t);
case O (O_JMP, SB):
{
pc = code->src.literal;
goto call;
- case O (O_RTS, SB):
+ case O (O_RTS, SN):
{
int tmp;
}
case O (O_ILL, SB):
+ cpu.state = SIM_STATE_STOPPED;
cpu.exception = SIGILL;
goto end;
- case O (O_SLEEP, SB):
- case O (O_BPT, SB):
+ case O (O_SLEEP, SN):
+ /* FIXME: Doesn't this break for breakpoints when r0
+ contains just the right (er, wrong) value? */
+ cpu.state = SIM_STATE_STOPPED;
+ /* The format of r0 is defined by target newlib. Expand
+ the macros here instead of looking for .../sys/wait.h. */
+#define SIM_WIFEXITED(v) (((v) & 0xff) == 0)
+#define SIM_WIFSIGNALED(v) (((v) & 0x7f) > 0 && (((v) & 0x7f) < 0x7f))
+ if (! SIM_WIFEXITED (cpu.regs[0]) && SIM_WIFSIGNALED (cpu.regs[0]))
+ cpu.exception = SIGILL;
+ else
+ cpu.exception = SIGTRAP;
+ goto end;
+ case O (O_BPT, SN):
+ cpu.state = SIM_STATE_STOPPED;
cpu.exception = SIGTRAP;
goto end;
OBITOP (O_BNOT, 1, 1, ea ^= m);
OBITOP (O_BTST, 1, 0, nz = ea & m);
OBITOP (O_BCLR, 1, 1, ea &= ~m);
- OBITOP (O_BSET, 1, 1, ea |= m);
+ OBITOP (O_BSET, 1, 1, ea |= m);
OBITOP (O_BLD, 1, 0, c = ea & m);
OBITOP (O_BILD, 1, 0, c = !(ea & m));
OBITOP (O_BST, 1, 1, ea &= ~m;
OBITOP (O_BIAND, 1, 0, c = !(ea & m) && C);
OBITOP (O_BOR, 1, 0, c = (ea & m) || C);
OBITOP (O_BIOR, 1, 0, c = !(ea & m) || C);
- OBITOP (O_BXOR, 1, 0, c = (ea & m) != C);
+ OBITOP (O_BXOR, 1, 0, c = ((ea & m) != 0) != C);
OBITOP (O_BIXOR, 1, 0, c = !(ea & m) != C);
-
-#define MOP(bsize, signed) mop(code, bsize,signed); goto next;
+#define MOP(bsize, signed) \
+ mop (code, bsize, signed); \
+ goto next;
case O (O_MULS, SB):
MOP (1, 1);
MOP (0, 0);
break;
+ case O (O_TAS, SB):
+ if (!h8300smode || code->src.type != X (OP_REG, SL))
+ goto illegal;
+ switch (code->src.reg)
+ {
+ case R0_REGNUM:
+ case R1_REGNUM:
+ case R4_REGNUM:
+ case R5_REGNUM:
+ break;
+ default:
+ goto illegal;
+ }
+ res = fetch (&code->src);
+ store (&code->src, res | 0x80);
+ goto just_flags_log8;
case O (O_DIVU, SB):
{
ea = GET_B_REG (code->src.reg);
if (ea)
{
- tmp = rd % ea;
- rd = rd / ea;
+ tmp = (unsigned) rd % ea;
+ rd = (unsigned) rd / ea;
}
SET_W_REG (code->dst.reg, (rd & 0xff) | (tmp << 8));
n = ea & 0x80;
nz = ea & 0xffff;
if (ea)
{
- tmp = rd % ea;
- rd = rd / ea;
+ tmp = (unsigned) rd % ea;
+ rd = (unsigned) rd / ea;
}
SET_L_REG (code->dst.reg, (rd & 0xffff) | (tmp << 16));
goto next;
goto next;
}
case O (O_EXTS, SW):
- rd = GET_B_REG (code->src.reg + 8) & 0xff; /* Yes, src, not dst. */
+ rd = GET_W_REG (code->src.reg) & 0xff; /* Yes, src, not dst. */
ea = rd & 0x80 ? -256 : 0;
res = rd + ea;
goto log16;
res = rd + ea;
goto log32;
case O (O_EXTU, SW):
- rd = GET_B_REG (code->src.reg + 8) & 0xff;
+ rd = GET_W_REG (code->src.reg) & 0xff;
ea = 0;
res = rd + ea;
goto log16;
res = rd + ea;
goto log32;
- case O (O_NOP, SB):
+ case O (O_NOP, SN):
+ goto next;
+
+ case O (O_STM, SL):
+ {
+ int nregs, firstreg, i;
+
+ nregs = GET_MEMORY_B (pc + 1);
+ nregs >>= 4;
+ nregs &= 0xf;
+ firstreg = GET_MEMORY_B (pc + 3);
+ firstreg &= 0xf;
+ for (i = firstreg; i <= firstreg + nregs; i++)
+ {
+ cpu.regs[7] -= 4;
+ SET_MEMORY_L (cpu.regs[7], cpu.regs[i]);
+ }
+ }
+ goto next;
+
+ case O (O_LDM, SL):
+ {
+ int nregs, firstreg, i;
+
+ nregs = GET_MEMORY_B (pc + 1);
+ nregs >>= 4;
+ nregs &= 0xf;
+ firstreg = GET_MEMORY_B (pc + 3);
+ firstreg &= 0xf;
+ for (i = firstreg; i >= firstreg - nregs; i--)
+ {
+ cpu.regs[i] = GET_MEMORY_L (cpu.regs[7]);
+ cpu.regs[7] += 4;
+ }
+ }
goto next;
+ case O (O_DAA, SB):
+ /* Decimal Adjust Addition. This is for BCD arithmetic. */
+ res = GET_B_REG (code->src.reg);
+ if (!c && (0 <= (res >> 4) && (res >> 4) <= 9)
+ && !h && (0 <= (res & 0xf) && (res & 0xf) <= 9))
+ res = res; /* Value added == 0. */
+ else if (!c && (0 <= (res >> 4) && (res >> 4) <= 8)
+ && !h && (10 <= (res & 0xf) && (res & 0xf) <= 15))
+ res = res + 0x6; /* Value added == 6. */
+ else if (!c && (0 <= (res >> 4) && (res >> 4) <= 9)
+ && h && (0 <= (res & 0xf) && (res & 0xf) <= 3))
+ res = res + 0x6; /* Value added == 6. */
+ else if (!c && (10 <= (res >> 4) && (res >> 4) <= 15)
+ && !h && (0 <= (res & 0xf) && (res & 0xf) <= 9))
+ res = res + 0x60; /* Value added == 60. */
+ else if (!c && (9 <= (res >> 4) && (res >> 4) <= 15)
+ && !h && (10 <= (res & 0xf) && (res & 0xf) <= 15))
+ res = res + 0x66; /* Value added == 66. */
+ else if (!c && (10 <= (res >> 4) && (res >> 4) <= 15)
+ && h && (0 <= (res & 0xf) && (res & 0xf) <= 3))
+ res = res + 0x66; /* Value added == 66. */
+ else if (c && (1 <= (res >> 4) && (res >> 4) <= 2)
+ && !h && (0 <= (res & 0xf) && (res & 0xf) <= 9))
+ res = res + 0x160; /* Value added == 60, plus 'carry'. */
+ else if (c && (1 <= (res >> 4) && (res >> 4) <= 2)
+ && !h && (10 <= (res & 0xf) && (res & 0xf) <= 15))
+ res = res + 0x166; /* Value added == 66, plus 'carry'. */
+ else if (c && (1 <= (res >> 4) && (res >> 4) <= 3)
+ && h && (0 <= (res & 0xf) && (res & 0xf) <= 3))
+ res = res + 0x166; /* Value added == 66, plus 'carry'. */
+
+ goto alu8;
+
+ case O (O_DAS, SB):
+ /* Decimal Adjust Subtraction. This is for BCD arithmetic. */
+ res = GET_B_REG (code->src.reg); /* FIXME fetch, fetch2... */
+ if (!c && (0 <= (res >> 4) && (res >> 4) <= 9)
+ && !h && (0 <= (res & 0xf) && (res & 0xf) <= 9))
+ res = res; /* Value added == 0. */
+ else if (!c && (0 <= (res >> 4) && (res >> 4) <= 8)
+ && h && (6 <= (res & 0xf) && (res & 0xf) <= 15))
+ res = res + 0xfa; /* Value added == 0xfa. */
+ else if (c && (7 <= (res >> 4) && (res >> 4) <= 15)
+ && !h && (0 <= (res & 0xf) && (res & 0xf) <= 9))
+ res = res + 0xa0; /* Value added == 0xa0. */
+ else if (c && (6 <= (res >> 4) && (res >> 4) <= 15)
+ && h && (6 <= (res & 0xf) && (res & 0xf) <= 15))
+ res = res + 0x9a; /* Value added == 0x9a. */
+
+ goto alu8;
+
default:
- cpu.exception = 123;
+ illegal:
+ cpu.state = SIM_STATE_STOPPED;
+ cpu.exception = SIGILL;
goto end;
}
abort ();
setc:
- cpu.ccr = res;
- GETSR ();
+ if (code->dst.type == OP_CCR)
+ {
+ cpu.ccr = res;
+ GETSR ();
+ }
+ else if (code->dst.type == OP_EXR && h8300smode)
+ {
+ cpu.exr = res;
+ GETEXR ();
+ }
+ else
+ goto illegal;
+
goto next;
condtrue:
shift8:
- /* Set flags after an 8 bit shift op, carry set in insn */
+ /* Set flags after an 8 bit shift op, carry,overflow set in insn */
n = (rd & 0x80);
- v = 0;
nz = rd & 0xff;
SET_B_REG (code->src.reg, rd);
goto next;
-
shift16:
- /* Set flags after an 16 bit shift op, carry set in insn */
+ /* Set flags after an 16 bit shift op, carry,overflow set in insn */
n = (rd & 0x8000);
- v = 0;
nz = rd & 0xffff;
-
SET_W_REG (code->src.reg, rd);
goto next;
shift32:
- /* Set flags after an 32 bit shift op, carry set in insn */
+ /* Set flags after an 32 bit shift op, carry,overflow set in insn */
n = (rd & 0x80000000);
- v = 0;
nz = rd & 0xffffffff;
SET_L_REG (code->src.reg, rd);
goto next;
just_flags_alu8:
n = res & 0x80;
nz = res & 0xff;
- v = ((ea & 0x80) == (rd & 0x80)) && ((ea & 0x80) != (res & 0x80));
c = (res & 0x100);
+ switch (code->opcode / 4)
+ {
+ case O_ADD:
+ v = ((rd & 0x80) == (ea & 0x80)
+ && (rd & 0x80) != (res & 0x80));
+ break;
+ case O_SUB:
+ case O_CMP:
+ v = ((rd & 0x80) != (-ea & 0x80)
+ && (rd & 0x80) != (res & 0x80));
+ break;
+ case O_NEG:
+ v = (rd == 0x80);
+ break;
+ }
goto next;
alu16:
just_flags_alu16:
n = res & 0x8000;
nz = res & 0xffff;
- v = ((ea & 0x8000) == (rd & 0x8000)) && ((ea & 0x8000) != (res & 0x8000));
c = (res & 0x10000);
+ switch (code->opcode / 4)
+ {
+ case O_ADD:
+ v = ((rd & 0x8000) == (ea & 0x8000)
+ && (rd & 0x8000) != (res & 0x8000));
+ break;
+ case O_SUB:
+ case O_CMP:
+ v = ((rd & 0x8000) != (-ea & 0x8000)
+ && (rd & 0x8000) != (res & 0x8000));
+ break;
+ case O_NEG:
+ v = (rd == 0x8000);
+ break;
+ }
goto next;
alu32:
just_flags_alu32:
n = res & 0x80000000;
nz = res & 0xffffffff;
- v = ((ea & 0x80000000) == (rd & 0x80000000))
- && ((ea & 0x80000000) != (res & 0x80000000));
switch (code->opcode / 4)
{
case O_ADD:
+ v = ((rd & 0x80000000) == (ea & 0x80000000)
+ && (rd & 0x80000000) != (res & 0x80000000));
c = ((unsigned) res < (unsigned) rd) || ((unsigned) res < (unsigned) ea);
break;
case O_SUB:
case O_CMP:
+ v = ((rd & 0x80000000) != (-ea & 0x80000000)
+ && (rd & 0x80000000) != (res & 0x80000000));
c = (unsigned) rd < (unsigned) -ea;
break;
case O_NEG:
+ v = (rd == 0x80000000);
c = res != 0;
break;
}
end:
;
- /* if (cpu.regs[8] ) abort(); */
+#if 0
+ if (cpu.regs[8])
+ abort ();
+#endif
-#ifdef __GO32__
- /* Poll after every 100th insn, */
- if (poll_count++ > 100)
+ if (--poll_count < 0)
{
- poll_count = 0;
- if (kbhit ())
- {
- int c = getkey ();
- control_c ();
- }
+ poll_count = POLL_QUIT_INTERVAL;
+ if ((*sim_callback->poll_quit) != NULL
+ && (*sim_callback->poll_quit) (sim_callback))
+ sim_stop (sd);
}
-#endif
}
- while (!cpu.exception);
+ while (cpu.state == SIM_STATE_RUNNING);
cpu.ticks += get_now () - tick_start;
cpu.cycles += cycles;
cpu.insts += insts;
cpu.pc = pc;
BUILDSR ();
-
+ BUILDEXR ();
+ cpu.mask = oldmask;
signal (SIGINT, prev);
}
+int
+sim_trace (SIM_DESC sd)
+{
+ /* FIXME: Unfinished. */
+ abort ();
+}
int
-sim_write (addr, buffer, size)
- SIM_ADDR addr;
- unsigned char *buffer;
- int size;
+sim_write (SIM_DESC sd, SIM_ADDR addr, unsigned char *buffer, int size)
{
int i;
init_pointers ();
- if (addr < 0 || addr + size > MSIZE)
+ if (addr < 0)
return 0;
for (i = 0; i < size; i++)
{
- cpu.memory[addr + i] = buffer[i];
- cpu.cache_idx[addr + i] = 0;
+ if (addr < memory_size)
+ {
+ cpu.memory[addr + i] = buffer[i];
+ cpu.cache_idx[addr + i] = 0;
+ }
+ else
+ cpu.eightbit[(addr + i) & 0xff] = buffer[i];
}
return size;
}
int
-sim_read (addr, buffer, size)
- SIM_ADDR addr;
- unsigned char *buffer;
- int size;
+sim_read (SIM_DESC sd, SIM_ADDR addr, unsigned char *buffer, int size)
{
init_pointers ();
- if (addr < 0 || addr + size > MSIZE)
+ if (addr < 0)
return 0;
- memcpy (buffer, cpu.memory + addr, size);
+ if (addr < memory_size)
+ memcpy (buffer, cpu.memory + addr, size);
+ else
+ memcpy (buffer, cpu.eightbit + (addr & 0xff), size);
return size;
}
-#define R0_REGNUM 0
-#define R1_REGNUM 1
-#define R2_REGNUM 2
-#define R3_REGNUM 3
-#define R4_REGNUM 4
-#define R5_REGNUM 5
-#define R6_REGNUM 6
-#define R7_REGNUM 7
-
-#define SP_REGNUM R7_REGNUM /* Contains address of top of stack */
-#define FP_REGNUM R6_REGNUM /* Contains address of executing
- * stack frame */
-
-#define CCR_REGNUM 8 /* Contains processor status */
-#define PC_REGNUM 9 /* Contains program counter */
-
-#define CYCLE_REGNUM 10
-#define INST_REGNUM 11
-#define TICK_REGNUM 12
-
-
int
-sim_store_register (rn, value)
- int rn;
- unsigned char *value;
+sim_store_register (SIM_DESC sd, int rn, unsigned char *value, int length)
{
int longval;
int shortval;
case CCR_REGNUM:
cpu.ccr = intval;
break;
+ case EXR_REGNUM:
+ cpu.exr = intval;
+ break;
case CYCLE_REGNUM:
cpu.cycles = longval;
break;
cpu.ticks = longval;
break;
}
- return 0;
+ return -1;
}
int
-sim_fetch_register (rn, buf)
- int rn;
- unsigned char *buf;
+sim_fetch_register (SIM_DESC sd, int rn, unsigned char *buf, int length)
{
int v;
int longreg = 0;
init_pointers ();
+ if (!h8300smode && rn >= EXR_REGNUM)
+ rn++;
switch (rn)
{
default:
abort ();
- case 8:
+ case CCR_REGNUM:
v = cpu.ccr;
break;
- case 9:
+ case EXR_REGNUM:
+ v = cpu.exr;
+ break;
+ case PC_REGNUM:
v = cpu.pc;
break;
case R0_REGNUM:
case R7_REGNUM:
v = cpu.regs[rn];
break;
- case 10:
+ case CYCLE_REGNUM:
v = cpu.cycles;
longreg = 1;
break;
- case 11:
+ case TICK_REGNUM:
v = cpu.ticks;
longreg = 1;
break;
- case 12:
+ case INST_REGNUM:
v = cpu.insts;
longreg = 1;
break;
buf[0] = v >> 8;
buf[1] = v;
}
- return 0;
+ return -1;
}
-int
-sim_trace ()
-{
- return 0;
-}
-
-int
-sim_stop_reason (reason, sigrc)
- enum sim_stop *reason;
- int *sigrc;
+void
+sim_stop_reason (SIM_DESC sd, enum sim_stop *reason, int *sigrc)
{
+#if 0 /* FIXME: This should work but we can't use it.
+ grep for SLEEP above. */
+ switch (cpu.state)
+ {
+ case SIM_STATE_EXITED : *reason = sim_exited; break;
+ case SIM_STATE_SIGNALLED : *reason = sim_signalled; break;
+ case SIM_STATE_STOPPED : *reason = sim_stopped; break;
+ default : abort ();
+ }
+#else
*reason = sim_stopped;
+#endif
*sigrc = cpu.exception;
- return 0;
}
-int
-sim_set_pc (n)
- SIM_ADDR n;
+/* FIXME: Rename to sim_set_mem_size. */
+
+void
+sim_size (int n)
{
- cpu.pc = n;
- return 0;
+ /* Memory size is fixed. */
}
-
-sim_csize (n)
+void
+sim_set_simcache_size (int n)
{
if (cpu.cache)
free (cpu.cache);
}
-int
-sim_info (printf_fn, verbose)
- void (*printf_fn) ();
- int verbose;
-
+void
+sim_info (SIM_DESC sd, int verbose)
{
double timetaken = (double) cpu.ticks / (double) now_persec ();
double virttime = cpu.cycles / 10.0e6;
- printf ("\n\n#instructions executed %10d\n", cpu.insts);
- printf ("#cycles (v approximate) %10d\n", cpu.cycles);
- printf ("#real time taken %10.4f\n", timetaken);
- printf ("#virtual time taked %10.4f\n", virttime);
+ (*sim_callback->printf_filtered) (sim_callback,
+ "\n\n#instructions executed %10d\n",
+ cpu.insts);
+ (*sim_callback->printf_filtered) (sim_callback,
+ "#cycles (v approximate) %10d\n",
+ cpu.cycles);
+ (*sim_callback->printf_filtered) (sim_callback,
+ "#real time taken %10.4f\n",
+ timetaken);
+ (*sim_callback->printf_filtered) (sim_callback,
+ "#virtual time taked %10.4f\n",
+ virttime);
if (timetaken != 0.0)
- printf ("#simulation ratio %10.4f\n", virttime / timetaken);
- printf ("#compiles %10d\n", cpu.compiles);
- printf ("#cache size %10d\n", cpu.csize);
-
+ (*sim_callback->printf_filtered) (sim_callback,
+ "#simulation ratio %10.4f\n",
+ virttime / timetaken);
+ (*sim_callback->printf_filtered) (sim_callback,
+ "#compiles %10d\n",
+ cpu.compiles);
+ (*sim_callback->printf_filtered) (sim_callback,
+ "#cache size %10d\n",
+ cpu.csize);
#ifdef ADEBUG
- if (verbose)
+ /* This to be conditional on `what' (aka `verbose'),
+ however it was never passed as non-zero. */
+ if (1)
{
int i;
for (i = 0; i < O_LAST; i++)
{
if (cpu.stats[i])
- printf ("%d: %d\n", i, cpu.stats[i]);
+ (*sim_callback->printf_filtered) (sim_callback,
+ "%d: %d\n", i, cpu.stats[i]);
}
}
#endif
+}
- return 0;
+/* Indicate whether the cpu is an H8/300 or H8/300H.
+ FLAG is non-zero for the H8/300H. */
+
+void
+set_h8300h (int h_flag, int s_flag)
+{
+ /* FIXME: Much of the code in sim_load can be moved to sim_open.
+ This function being replaced by a sim_open:ARGV configuration
+ option. */
+ h8300hmode = h_flag;
+ h8300smode = s_flag;
+}
+
+SIM_DESC
+sim_open (SIM_OPEN_KIND kind,
+ struct host_callback_struct *ptr,
+ struct bfd *abfd,
+ char **argv)
+{
+ /* FIXME: Much of the code in sim_load can be moved here. */
+
+ sim_kind = kind;
+ myname = argv[0];
+ sim_callback = ptr;
+ /* Fudge our descriptor. */
+ return (SIM_DESC) 1;
}
void
-set_h8300h ()
+sim_close (SIM_DESC sd, int quitting)
{
- h8300hmode = 1;
+ /* Nothing to do. */
}
-int
-sim_kill ()
+/* Called by gdb to load a program into memory. */
+
+SIM_RC
+sim_load (SIM_DESC sd, char *prog, bfd *abfd, int from_tty)
{
- return 0;
+ bfd *prog_bfd;
+
+ /* FIXME: The code below that sets a specific variant of the H8/300
+ being simulated should be moved to sim_open(). */
+
+ /* See if the file is for the H8/300 or H8/300H. */
+ /* ??? This may not be the most efficient way. The z8k simulator
+ does this via a different mechanism (INIT_EXTRA_SYMTAB_INFO). */
+ if (abfd != NULL)
+ prog_bfd = abfd;
+ else
+ prog_bfd = bfd_openr (prog, "coff-h8300");
+ if (prog_bfd != NULL)
+ {
+ /* Set the cpu type. We ignore failure from bfd_check_format
+ and bfd_openr as sim_load_file checks too. */
+ if (bfd_check_format (prog_bfd, bfd_object))
+ {
+ unsigned long mach = bfd_get_mach (prog_bfd);
+ set_h8300h (mach == bfd_mach_h8300h || mach == bfd_mach_h8300s,
+ mach == bfd_mach_h8300s);
+ }
+ }
+
+ /* If we're using gdb attached to the simulator, then we have to
+ reallocate memory for the simulator.
+
+ When gdb first starts, it calls fetch_registers (among other
+ functions), which in turn calls init_pointers, which allocates
+ simulator memory.
+
+ The problem is when we do that, we don't know whether we're
+ debugging an H8/300 or H8/300H program.
+
+ This is the first point at which we can make that determination,
+ so we just reallocate memory now; this will also allow us to handle
+ switching between H8/300 and H8/300H programs without exiting
+ gdb. */
+
+ if (h8300smode)
+ memory_size = H8300S_MSIZE;
+ else if (h8300hmode)
+ memory_size = H8300H_MSIZE;
+ else
+ memory_size = H8300_MSIZE;
+
+ if (cpu.memory)
+ free (cpu.memory);
+ if (cpu.cache_idx)
+ free (cpu.cache_idx);
+ if (cpu.eightbit)
+ free (cpu.eightbit);
+
+ cpu.memory = (unsigned char *) calloc (sizeof (char), memory_size);
+ cpu.cache_idx = (unsigned short *) calloc (sizeof (short), memory_size);
+ cpu.eightbit = (unsigned char *) calloc (sizeof (char), 256);
+
+ /* `msize' must be a power of two. */
+ if ((memory_size & (memory_size - 1)) != 0)
+ abort ();
+ cpu.mask = memory_size - 1;
+
+ if (sim_load_file (sd, myname, sim_callback, prog, prog_bfd,
+ sim_kind == SIM_OPEN_DEBUG,
+ 0, sim_write)
+ == NULL)
+ {
+ /* Close the bfd if we opened it. */
+ if (abfd == NULL && prog_bfd != NULL)
+ bfd_close (prog_bfd);
+ return SIM_RC_FAIL;
+ }
+
+ /* Close the bfd if we opened it. */
+ if (abfd == NULL && prog_bfd != NULL)
+ bfd_close (prog_bfd);
+ return SIM_RC_OK;
}
-sim_open (name)
- char *name;
+SIM_RC
+sim_create_inferior (SIM_DESC sd, struct bfd *abfd, char **argv, char **env)
{
- return 0;
+ int i = 0;
+ int len_arg = 0;
+ int no_of_args = 0;
+
+ if (abfd != NULL)
+ cpu.pc = bfd_get_start_address (abfd);
+ else
+ cpu.pc = 0;
+
+ /* Command Line support. */
+ if (argv != NULL)
+ {
+ /* Counting the no. of commandline arguments. */
+ for (no_of_args = 0; argv[no_of_args] != NULL; no_of_args++)
+ continue;
+
+ /* Allocating memory for the argv pointers. */
+ ptr_command_line = (char **) malloc ((sizeof (char *))
+ * (no_of_args + 1));
+
+ for (i = 0; i < no_of_args; i++)
+ {
+ /* Calculating the length of argument for allocating memory. */
+ len_arg = strlen (argv[i] + 1);
+ ptr_command_line[i] = (char *) malloc (sizeof (char) * len_arg);
+ /* Copying the argument string. */
+ ptr_command_line[i] = (char *) strdup (argv[i]);
+ }
+ ptr_command_line[i] = NULL;
+ }
+
+ return SIM_RC_OK;
+}
+
+void
+sim_do_command (SIM_DESC sd, char *cmd)
+{
+ (*sim_callback->printf_filtered) (sim_callback,
+ "This simulator does not accept any commands.\n");
}
-sim_set_args (argv, env)
- char **argv;
- char **env;
+void
+sim_set_callbacks (struct host_callback_struct *ptr)
{
- return 0;
+ sim_callback = ptr;
}
projects / binutils-gdb.git / blobdiff