#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
-#include "wait.h"
#include "ansidecl.h"
#include "bfd.h"
#include "callback.h"
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
#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 = (N << 3) | (Z << 2) | (V<<1) | C;
+#define BUILDSR() cpu.ccr = (I << 7) | (UI << 6)| (H<<5) | (U<<4) | \
+ (N << 3) | (Z << 2) | (V<<1) | C;
#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;
#ifdef __CHAR_IS_SIGNED__
-#define SEXTCHAR(x) ((char)(x))
+#define SEXTCHAR(x) ((char) (x))
#endif
#ifndef SEXTCHAR
#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;
static int memory_size;
-
static int
get_now ()
{
-#ifndef WIN32
- return time (0);
-#endif
- return 0;
+ return time (0); /* WinXX HAS UNIX like 'time', so why not using it? */
}
static int
return 1;
}
-
static int
bitfrom (x)
{
}
}
-static
-unsigned int
+static unsigned int
lvalue (x, 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? */
}
}
int rd = 0;
int rdisp = 0;
int abs = 0;
- int plen = 0;
int bit = 0;
-
- struct h8_opcode *q = h8_opcodes;
+ int plen = 0;
+ 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)
{
plen = 8;
abs = h8300hmode ? ~0xff0000ff : ~0xffff00ff;
- abs |= data[len >> 1] & 0xff ;
+ abs |= data[len >> 1] & 0xff;
}
- else
+ else
{
abs = data[len >> 1] & 0xff;
}
{
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);
- }
+ p = &(dst->src);
- if (x & (L_3))
+ if (x & L_3)
{
p->type = X (OP_IMM, size);
p->literal = bit;
}
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);
}
}
- /*
- * 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 0xc4 is turned into a magic trap. */
if (dst->opcode == O (O_JSR, SB))
{
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)
{
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;
}
return t;
default:
- abort ();
+ abort (); /* ?? May be something more usefull? */
}
}
-static
-void
+static void
store (arg, n)
ea_type *arg;
int n;
littleendian;
-static
-void
+static void
init_pointers ()
{
static int init;
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 */
+ /* `msize' must be a power of two. */
if ((memory_size & (memory_size - 1)) != 0)
abort ();
cpu.mask = memory_size - 1;
lreg[8] = &cpu.regs[8];
- /* initialize the seg registers */
+ /* Initialize the seg registers. */
if (!cpu.cache)
sim_set_simcache_size (CSIZE);
}
#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)
{
SET_L_REG (code->dst.reg, result);
}
-/* return ((n==1) << 1) | (nz==1); */
-
+#if 0
+ return ((n == 1) << 1) | (nz == 1);
+#endif
}
#define ONOT(name, how) \
int ea;
int bit;
int pc;
- int c, nz, v, n;
+ int c, nz, v, n, u, h, ui, intMaskBit;
int oldmask;
init_pointers ();
#endif
- cycles += code->cycles;
- insts++;
+ if (code->opcode)
+ {
+ cycles += code->cycles;
+ insts++;
+ }
+
switch (code->opcode)
{
case 0:
cpu.exception = SIGILL;
goto end;
case O (O_SLEEP, SN):
- /* The format of r0 is defined by devo/include/wait.h. */
-#if 0 /* FIXME: Ugh. A breakpoint is the sleep insn. */
- if (WIFEXITED (cpu.regs[0]))
- {
- cpu.state = SIM_STATE_EXITED;
- cpu.exception = WEXITSTATUS (cpu.regs[0]);
- }
- else if (WIFSTOPPED (cpu.regs[0]))
- {
- cpu.state = SIM_STATE_STOPPED;
- cpu.exception = WSTOPSIG (cpu.regs[0]);
- }
- else
- {
- cpu.state = SIM_STATE_SIGNALLED;
- cpu.exception = WTERMSIG (cpu.regs[0]);
- }
-#else
/* FIXME: Doesn't this break for breakpoints when r0
contains just the right (er, wrong) value? */
cpu.state = SIM_STATE_STOPPED;
- if (! WIFEXITED (cpu.regs[0]) && WIFSIGNALED (cpu.regs[0]))
+ /* 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;
-#endif
goto end;
case O (O_BPT, SN):
cpu.state = SIM_STATE_STOPPED;
OBITOP (O_BXOR, 1, 0, c = (ea & m) != 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);
ea = GET_B_REG (code->src.reg);
if (ea)
{
- tmp = (unsigned)rd % ea;
- rd = (unsigned)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 = (unsigned)rd % ea;
- rd = (unsigned)rd / ea;
+ tmp = (unsigned) rd % ea;
+ rd = (unsigned) rd / ea;
}
SET_L_REG (code->dst.reg, (rd & 0xffff) | (tmp << 16));
goto next;
end:
;
- /* if (cpu.regs[8] ) abort(); */
+#if 0
+ if (cpu.regs[8])
+ abort ();
+#endif
if (--poll_count < 0)
{
- poll_count = 100;
+ poll_count = POLL_QUIT_INTERVAL;
if ((*sim_callback->poll_quit) != NULL
&& (*sim_callback->poll_quit) (sim_callback))
sim_stop (sd);
cpu.ticks += get_now () - tick_start;
cpu.cycles += cycles;
cpu.insts += insts;
-
+
cpu.pc = pc;
BUILDSR ();
cpu.mask = oldmask;
sim_trace (sd)
SIM_DESC sd;
{
- /* FIXME: unfinished */
+ /* FIXME: Unfinished. */
abort ();
}
#define SP_REGNUM R7_REGNUM /* Contains address of top of stack */
#define FP_REGNUM R6_REGNUM /* Contains address of executing
- * stack frame */
+ * stack frame */
#define CCR_REGNUM 8 /* Contains processor status */
#define PC_REGNUM 9 /* Contains program counter */
{
default:
abort ();
- case 8:
+ case CCR_REGNUM:
v = cpu.ccr;
break;
- case 9:
+ 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;
#endif
}
-/* Indicate whether the cpu is an h8/300 or h8/300h.
- FLAG is non-zero for the h8/300h. */
+/* Indicate whether the cpu is an H8/300 or H8/300H.
+ FLAG is non-zero for the H8/300H. */
void
set_h8300h (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 */
+ option. */
h8300hmode = flag;
}
struct _bfd *abfd;
char **argv;
{
- /* FIXME: Much of the code in sim_load can be moved here */
+ /* FIXME: Much of the code in sim_load can be moved here. */
sim_kind = kind;
myname = argv[0];
sim_callback = ptr;
- /* fudge our descriptor */
+ /* Fudge our descriptor. */
return (SIM_DESC) 1;
}
SIM_DESC sd;
int quitting;
{
- /* nothing to do */
+ /* Nothing to do. */
}
/* Called by gdb to load a program into memory. */
{
bfd *prog_bfd;
- /* FIXME: The code below that sets a specific variant of the h8/300
- being simulated should be moved to sim_open(). */
+ /* 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. */
+ /* 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)
{
/* 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))
+ if (bfd_check_format (prog_bfd, bfd_object))
{
unsigned long mach = bfd_get_mach (prog_bfd);
set_h8300h (mach == bfd_mach_h8300h
simulator memory.
The problem is when we do that, we don't know whether we're
- debugging an h8/300 or h8/300h program.
+ 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
+ switching between H8/300 and H8/300H programs without exiting
gdb. */
if (h8300hmode)
memory_size = H8300H_MSIZE;
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 */
+ /* `msize' must be a power of two. */
if ((memory_size & (memory_size - 1)) != 0)
abort ();
cpu.mask = memory_size - 1;
projects / deliverable / binutils-gdb.git / blobdiff