unsigned char * p;
unsigned char * startaddr = (unsigned char *)addr;
unsigned char * endaddr = startaddr + len;
-
+
if (len > (int) sizeof (unsigned long))
printf ("That operation is not available on integers of more than %zu bytes.",
sizeof (unsigned long));
-
+
/* Start at the most significant end of the integer, and work towards
the least significant. */
retval = 0;
for (p = startaddr; p < endaddr;)
retval = (retval << 8) | * p ++;
}
-
+
return retval;
}
}
/* The machine state.
- This state is maintained in host byte order. The
+ This state is maintained in host byte order. The
fetch/store register functions must translate between host
- byte order and the target processor byte order.
+ byte order and the target processor byte order.
Keeping this data in target byte order simplifies the register
read/write functions. Keeping this data in native order improves
the performance of the simulator. Simulation speed is deemed more
int_sbrk (int inc_bytes)
{
long addr;
-
+
addr = heap_ptr;
-
+
heap_ptr += inc_bytes;
-
+
if (issue_messages && heap_ptr>cpu.gr[0])
fprintf (stderr, "Warning: heap_ptr overlaps stack!\n");
-
+
return addr;
}
{
if (issue_messages)
fprintf (stderr, "byte write to 0x%x outside memory range\n", x);
-
+
cpu.asregs.exception = SIGSEGV;
}
else
{
if (issue_messages)
fprintf (stderr, "word write to 0x%x outside memory range\n", x);
-
+
cpu.asregs.exception = SIGSEGV;
}
else
{
if (issue_messages)
fprintf (stderr, "word write to unaligned memory address: 0x%x\n", x);
-
+
cpu.asregs.exception = SIGBUS;
}
else if (! target_big_endian)
{
if (issue_messages)
fprintf (stderr, "short write to 0x%x outside memory range\n", x);
-
+
cpu.asregs.exception = SIGSEGV;
}
else
if (issue_messages)
fprintf (stderr, "short write to unaligned memory address: 0x%x\n",
x);
-
+
cpu.asregs.exception = SIGBUS;
}
else if (! target_big_endian)
{
if (issue_messages)
fprintf (stderr, "byte read from 0x%x outside memory range\n", x);
-
+
cpu.asregs.exception = SIGSEGV;
return 0;
}
{
if (issue_messages)
fprintf (stderr, "word read from 0x%x outside memory range\n", x);
-
+
cpu.asregs.exception = SIGSEGV;
return 0;
}
{
if (issue_messages)
fprintf (stderr, "word read from unaligned address: 0x%x\n", x);
-
+
cpu.asregs.exception = SIGBUS;
return 0;
}
{
if (issue_messages)
fprintf (stderr, "short read from 0x%x outside memory range\n", x);
-
+
cpu.asregs.exception = SIGSEGV;
return 0;
}
{
if (issue_messages)
fprintf (stderr, "short read from unaligned address: 0x%x\n", x);
-
+
cpu.asregs.exception = SIGBUS;
return 0;
}
int i;
long space;
unsigned long memsize;
-
+
init_pointers ();
/* Set up machine just out of reset. */
cpu.asregs.pc = 0;
cpu.sr = 0;
-
+
memsize = cpu.asregs.msize / (1024 * 1024);
if (issue_messages > 1)
cpu.asregs.gregs[i] = 0;
cpu.asregs.alt_gregs[i] = 0;
}
-
+
/* Make our register set point to the right place. */
if (SR_AF())
cpu.asregs.active_gregs = &cpu.asregs.alt_gregs[0];
else
cpu.asregs.active_gregs = &cpu.asregs.gregs[0];
-
+
/* ABI specifies initial values for these registers. */
cpu.gr[0] = cpu.asregs.msize - 4;
-
+
/* dac fix, the stack address must be 8-byte aligned! */
cpu.gr[0] = cpu.gr[0] - cpu.gr[0] % 8;
cpu.gr[PARM1] = 0;
{
if (fd < 0 || fd > NUM_ELEM (opened))
return;
-
+
opened[fd] = 1;
}
{
if (fd < 0 || fd > NUM_ELEM (opened))
return;
-
+
opened[fd] = 0;
}
a[2] = (unsigned long) (cpu.gr[PARM3]);
cpu.gr[RET1] = callback->read (callback, a[0], (char *) a[1], a[2]);
break;
-
+
case 4:
a[0] = (unsigned long) (cpu.gr[PARM1]);
a[1] = (unsigned long) (cpu.mem + cpu.gr[PARM2]);
a[2] = (unsigned long) (cpu.gr[PARM3]);
cpu.gr[RET1] = (int)callback->write (callback, a[0], (char *) a[1], a[2]);
break;
-
+
case 5:
a[0] = (unsigned long) (cpu.mem + cpu.gr[PARM1]);
a[1] = (unsigned long) (cpu.gr[PARM2]);
cpu.gr[RET1] = callback->open (callback, (char *) a[0], a[1]);
log_open (cpu.gr[RET1]);
break;
-
+
case 6:
a[0] = (unsigned long) (cpu.gr[PARM1]);
/* Watch out for debugger's files. */
cpu.gr[RET1] = (-1);
}
break;
-
+
case 9:
a[0] = (unsigned long) (cpu.mem + cpu.gr[PARM1]);
a[1] = (unsigned long) (cpu.mem + cpu.gr[PARM2]);
cpu.gr[RET1] = link ((char *) a[0], (char *) a[1]);
break;
-
+
case 10:
a[0] = (unsigned long) (cpu.mem + cpu.gr[PARM1]);
cpu.gr[RET1] = callback->unlink (callback, (char *) a[0]);
break;
-
+
case 13:
/* handle time(0) vs time(&var) */
a[0] = (unsigned long) (cpu.gr[PARM1]);
a[0] += (unsigned long) cpu.mem;
cpu.gr[RET1] = callback->time (callback, (time_t *) a[0]);
break;
-
+
case 19:
a[0] = (unsigned long) (cpu.gr[PARM1]);
a[1] = (unsigned long) (cpu.gr[PARM2]);
a[2] = (unsigned long) (cpu.gr[PARM3]);
cpu.gr[RET1] = callback->lseek (callback, a[0], a[1], a[2]);
break;
-
+
case 33:
a[0] = (unsigned long) (cpu.mem + cpu.gr[PARM1]);
a[1] = (unsigned long) (cpu.gr[PARM2]);
cpu.gr[RET1] = access ((char *) a[0], a[1]);
break;
-
+
case 43:
a[0] = (unsigned long) (cpu.mem + cpu.gr[PARM1]);
#if 0
t.tms_stime = cpu.asregs.insts;
t.tms_cutime = t.tms_utime;
t.tms_cstime = t.tms_stime;
-
+
memcpy ((struct tms *)(a[0]), &t, sizeof (t));
-
+
cpu.gr[RET1] = cpu.asregs.cycles;
}
#endif
break;
-
+
case 69:
a[0] = (unsigned long) (cpu.gr[PARM1]);
cpu.gr[RET1] = int_sbrk (a[0]);
break;
-
+
default:
if (issue_messages)
fprintf (stderr, "WARNING: sys call %d unimplemented\n",
cpu.gr [TRAPCODE] = what;
handle_trap1 ();
break;
-
+
default:
if (issue_messages)
fprintf (stderr, "Unhandled stub opcode: %d\n", what);
i++;
}
}
-
+
cpu.gr[RET1] = printf ((char *)a[0], a[1], a[2], a[3], a[4], a[5]);
}
break;
-
+
case 2: /* scanf */
if (issue_messages)
fprintf (stderr, "WARNING: scanf unimplemented\n");
break;
-
+
case 3: /* utime */
cpu.gr[RET1] = cpu.asregs.insts;
break;
case 0xFF:
process_stub (cpu.gr[1]);
break;
-
+
default:
if (issue_messages)
fprintf (stderr, "Unhandled util code: %x\n", what);
break;
}
-}
+}
/* For figuring out whether we carried; addc/subc use this. */
static int
iu_carry (unsigned long a, unsigned long b, int cin)
{
unsigned long x;
-
+
x = (a & 0xffff) + (b & 0xffff) + cin;
x = (x >> 16) + (a >> 16) + (b >> 16);
x >>= 16;
memops = 0;
bonus_cycles = 0;
insts = 0;
-
+
/* make our register set point to the right place */
if (SR_AF ())
cpu.asregs.active_gregs = & cpu.asregs.alt_gregs[0];
else
cpu.asregs.active_gregs = & cpu.asregs.gregs[0];
-
+
/* make a hash to speed exec loop, hope it's nonzero */
WLhash = 0xFFFFFFFF;
do
{
word oldpc;
-
+
insts ++;
-
+
if (pc & 02)
{
if (! target_big_endian)
#ifdef WATCHFUNCTIONS
/* now scan list of watch addresses, if match, count it and
note return address and count cycles until pc=return address */
-
+
if ((WLincyc == 1) && (pc == WLendpc))
{
cycs = (cpu.asregs.cycles + (insts + bonus_cycles +
(memops * memcycles)) - WLbcyc);
-
+
if (WLcnts[WLW] == 1)
{
WLmax[WLW] = cycs;
WLmin[WLW] = cycs;
WLcyc[WLW] = 0;
}
-
+
if (cycs > WLmax[WLW])
{
WLmax[WLW] = cycs;
}
-
+
if (cycs < WLmin[WLW])
{
WLmin[WLW] = cycs;
}
-
+
WLcyc[WLW] += cycs;
WLincyc = 0;
WLendpc = 0;
- }
+ }
/* Optimize with a hash to speed loop. */
if (WLincyc == 0)
if (pc == WL[w])
{
WLcnts[w]++;
- WLbcyc = cpu.asregs.cycles + insts
+ WLbcyc = cpu.asregs.cycles + insts
+ bonus_cycles + (memops * memcycles);
WLendpc = cpu.gr[15];
WLincyc = 1;
fprintf (stderr, "%.4x: inst = %.4x ", pc, inst);
oldpc = pc;
-
+
pc += 2;
-
+
switch (inst >> 8)
{
case 0x00:
cpu.asregs.exception = SIGTRAP;
pc -= 2;
break;
-
+
case 0x1: /* sync */
break;
-
+
case 0x2: /* rte */
pc = cpu.epc;
cpu.sr = cpu.esr;
needfetch = 1;
-
+
if (SR_AF ())
cpu.asregs.active_gregs = & cpu.asregs.alt_gregs[0];
else
else
cpu.asregs.active_gregs = &cpu.asregs.gregs[0];
break;
-
+
case 0x4: /* stop */
if (issue_messages)
fprintf (stderr, "WARNING: stop unimplemented\n");
break;
-
+
case 0x5: /* wait */
if (issue_messages)
fprintf (stderr, "WARNING: wait unimplemented\n");
break;
-
+
case 0x6: /* doze */
if (issue_messages)
fprintf (stderr, "WARNING: doze unimplemented\n");
break;
-
+
case 0x7:
cpu.asregs.exception = SIGILL; /* illegal */
break;
-
+
case 0x8: /* trap 0 */
case 0xA: /* trap 2 */
case 0xB: /* trap 3 */
cpu.asregs.exception = SIGTRAP;
break;
-
+
case 0xC: /* trap 4 */
case 0xD: /* trap 5 */
case 0xE: /* trap 6 */
cpu.asregs.exception = SIGILL; /* illegal */
break;
-
+
case 0xF: /* trap 7 */
cpu.asregs.exception = SIGTRAP; /* integer div-by-0 */
break;
-
+
case 0x9: /* trap 1 */
handle_trap1 ();
break;
}
break;
-
+
case 0x1:
cpu.asregs.exception = SIGILL; /* illegal */
break;
-
+
case 0x2: /* mvc */
cpu.gr[RD] = C_VALUE();
break;
{
word addr = cpu.gr[RD];
int regno = 4; /* always r4-r7 */
-
+
bonus_cycles++;
memops += 4;
do
{
word addr = cpu.gr[RD];
int regno = 4; /* always r4-r7 */
-
+
memops += 4;
bonus_cycles++;
do
{
word addr = cpu.gr[0];
int regno = RD;
-
+
/* bonus cycle is really only needed if
the next insn shifts the last reg loaded.
-
+
bonus_cycles++;
*/
memops += 16-regno;
{
word addr = cpu.gr[0];
int regno = RD;
-
+
/* this should be removed! */
/* bonus_cycles ++; */
case 0x01:
switch RS
{
- case 0x0: /* xtrb3 */
+ case 0x0: /* xtrb3 */
cpu.gr[1] = (cpu.gr[RD]) & 0xFF;
NEW_C (cpu.gr[RD] != 0);
break;
cpu.gr[RD] = tmp;
}
break;
- case 0x8: /* declt */
+ case 0x8: /* declt */
--cpu.gr[RD];
NEW_C ((long)cpu.gr[RD] < 0);
break;
(tmp & 0x00FF0000) != 0 && (tmp & 0x0000FF00) != 0 &&
(tmp & 0x000000FF) != 0);
}
- break;
+ break;
case 0xA: /* decgt */
--cpu.gr[RD];
NEW_C ((long)cpu.gr[RD] > 0);
{
unsigned int t = cpu.gr[RS];
int ticks;
- for (ticks = 0; t != 0 ; t >>= 2)
+ for (ticks = 0; t != 0 ; t >>= 2)
ticks++;
bonus_cycles += ticks;
}
}
--cpu.gr[RS]; /* not RD! */
NEW_C (((long)cpu.gr[RS]) > 0);
- break;
+ break;
case 0x05: /* subu */
cpu.gr[RD] -= cpu.gr[RS];
break;
cpu.gr[RD] = cpu.gr[RS];
break;
case 0x0B: /* lsr */
- {
+ {
unsigned long dst, src;
dst = cpu.gr[RD];
src = cpu.gr[RS];
}
break;
case 0x0C: /* cmphs */
- NEW_C ((unsigned long )cpu.gr[RD] >=
+ NEW_C ((unsigned long )cpu.gr[RD] >=
(unsigned long)cpu.gr[RS]);
break;
case 0x0D: /* cmplt */
cpu.cr[r] = cpu.gr[RD];
else
cpu.asregs.exception = SIGILL;
-
+
/* we might have changed register sets... */
if (SR_AF ())
cpu.asregs.active_gregs = & cpu.asregs.alt_gregs[0];
CLR_C();
}
break;
-
+
case 0x2C: case 0x2D: /* bmaski, divu */
{
unsigned imm = IMM5;
-
+
if (imm == 1)
{
int exe;
/* unsigned divide */
cpu.gr[RD] = (word) ((unsigned int) cpu.gr[RD] / (unsigned int)cpu.gr[1] );
-
+
/* compute bonus_cycles for divu */
for (r1nlz = 0; ((r1 & 0x80000000) == 0) && (r1nlz < 32); r1nlz ++)
r1 = r1 << 1;
int exe,sc;
int rxnlz, r1nlz;
signed int rx, r1;
-
+
/* compute bonus_cycles for divu */
rx = cpu.gr[RD];
r1 = cpu.gr[1];
exe = 0;
-
+
if (((rx < 0) && (r1 > 0)) || ((rx >= 0) && (r1 < 0)))
sc = 1;
else
sc = 0;
-
+
rx = abs (rx);
r1 = abs (r1);
-
+
/* signed divide, general registers are of type int, so / op is OK */
cpu.gr[RD] = cpu.gr[RD] / cpu.gr[1];
-
+
for (r1nlz = 0; ((r1 & 0x80000000) == 0) && (r1nlz < 32) ; r1nlz ++ )
r1 = r1 << 1;
-
+
for (rxnlz = 0; ((rx & 0x80000000) == 0) && (rxnlz < 32) ; rxnlz ++ )
rx = rx << 1;
-
+
if (r1nlz < rxnlz)
exe += 5;
else
exe += 6 + r1nlz - rxnlz + sc;
-
+
if (exe >= (2 * memcycles - 1))
{
bonus_cycles += exe - (2 * memcycles) + 1;
cpu.asregs.exception = SIGILL;
break;
case 0x50:
- util (inst & 0xFF);
+ util (inst & 0xFF);
break;
case 0x51: case 0x52: case 0x53:
case 0x54: case 0x55: case 0x56: case 0x57:
memops++;
break;
case 0xE8: case 0xE9: case 0xEA: case 0xEB:
- case 0xEC: case 0xED: case 0xEE: case 0xEF: /* bf */
+ case 0xEC: case 0xED: case 0xEE: case 0xEF: /* bf */
if (C_OFF())
{
int disp;
break;
case 0xF8: case 0xF9: case 0xFA: case 0xFB:
- case 0xFC: case 0xFD: case 0xFE: case 0xFF: /* bsr */
+ case 0xFC: case 0xFD: case 0xFE: case 0xFF: /* bsr */
cpu.gr[15] = pc;
case 0xF0: case 0xF1: case 0xF2: case 0xF3:
case 0xF4: case 0xF5: case 0xF6: case 0xF7: /* br */
if (tracing)
fprintf (stderr, "\n");
- if (needfetch)
+ if (needfetch)
{
/* Do not let him fetch from a bad address! */
if (((uword)pc) >= cpu.asregs.msize)
{
if (issue_messages)
fprintf (stderr, "PC loaded at 0x%x is outside of available memory! (0x%x)\n", oldpc, pc);
-
+
cpu.asregs.exception = SIGSEGV;
}
else
{
int i;
init_pointers ();
-
+
memcpy (& cpu.mem[addr], buffer, size);
-
+
return size;
}
{
int i;
init_pointers ();
-
+
memcpy (buffer, & cpu.mem[addr], size);
-
+
return size;
}
if (length == 4)
{
long ival;
-
+
/* misalignment safe */
ival = mcore_extract_unsigned_integer (memory, 4);
cpu.asints[rn] = ival;
sim_fetch_register (SIM_DESC sd, int rn, unsigned char *memory, int length)
{
init_pointers ();
-
+
if (rn < NUM_MCORE_REGS && rn >= 0)
{
if (length == 4)
/* misalignment-safe */
mcore_store_unsigned_integer (memory, 4, ival);
}
-
+
return 4;
}
else
sim_trace (SIM_DESC sd)
{
tracing = 1;
-
+
sim_resume (sd, 0, 0);
tracing = 0;
-
+
return 1;
}
ENDWL);
wcyc = 0;
-
+
for (w = 1; w <= ENDWL; w++)
{
callback->printf_filtered (callback, "WL = %s %8x\n",WLstr[w],WL[w]);
callback->printf_filtered (callback, " calls = %d, cycles = %d\n",
WLcnts[w],WLcyc[w]);
-
+
if (WLcnts[w] != 0)
callback->printf_filtered (callback,
" maxcpc = %d, mincpc = %d, avecpc = %d\n",
WLmax[w],WLmin[w],WLcyc[w]/WLcnts[w]);
wcyc += WLcyc[w];
}
-
+
callback->printf_filtered (callback,
"Total cycles for watched functions: %d\n",wcyc);
#endif
int osize = sim_memory_size;
myname = argv[0];
callback = cb;
-
+
if (kind == SIM_OPEN_STANDALONE)
issue_messages = 1;
-
+
/* Discard and reacquire memory -- start with a clean slate. */
sim_size (1); /* small */
sim_size (osize); /* and back again */
set_initial_gprs (); /* Reset the GPR registers. */
-
+
/* Fudge our descriptor for now. */
return (SIM_DESC) 1;
}
bfd * handle;
asection * s_bss;
handle = bfd_openr (prog, 0); /* could be "mcore" */
-
+
if (!handle)
{
printf("``%s'' could not be opened.\n", prog);
return SIM_RC_FAIL;
}
-
- /* Makes sure that we have an object file, also cleans gets the
+
+ /* Makes sure that we have an object file, also cleans gets the
section headers in place. */
if (!bfd_check_format (handle, bfd_object))
{
/* Look for that bss section. */
s_bss = bfd_get_section_by_name (handle, ".bss");
-
+
if (!s_bss)
{
printf("``%s'' has no bss section.\n", prog);
/* Clean up after ourselves. */
bfd_close (handle);
-
+
/* XXX: do we need to free the s_bss and handle structures? */
}
0, sim_write);
if (prog_bfd == NULL)
return SIM_RC_FAIL;
-
+
target_big_endian = bfd_big_endian (prog_bfd);
-
+
if (abfd == NULL)
bfd_close (prog_bfd);
issue_messages = 0;
set_initial_gprs ();
issue_messages = l;
-
+
hi_stack = cpu.asregs.msize - 4;
cpu.asregs.pc = bfd_get_start_address (prog_bfd);
pointers += 4;
strings += l+1;
}
-
+
/* A null to finish the list. */
wlat (pointers, 0);
pointers += 4;
{
cpu.gr[PARM3] = pointers;
avp = env;
-
+
while (avp && *avp)
{
/* Save where we're putting it. */
pointers += 4;
strings += l+1;
}
-
+
/* A null to finish the list. */
wlat (pointers, 0);
pointers += 4;
}
-
+
return SIM_RC_OK;
}
sim_do_command (SIM_DESC sd, const char *cmd)
{
/* Nothing there yet; it's all an error. */
-
+
if (cmd != NULL)
{
char ** simargv = buildargv (cmd);
-
+
if (strcmp (simargv[0], "watch") == 0)
{
if ((simargv[1] == NULL) || (simargv[2] == NULL))
freeargv (simargv);
return;
}
-
+
ENDWL++;
-
+
WL[ENDWL] = strtol (simargv[2], NULL, 0);
WLstr[ENDWL] = strdup (simargv[1]);
fprintf (stderr, "Added %s (%x) to watchlist, #%d\n",WLstr[ENDWL],
fprintf (stderr, "Error: missing argument to dumpmem cmd.\n");
fprintf (stderr, "Writing dumpfile %s...",simargv[1]);
-
+
dumpfile = fopen (simargv[1], "w");
p = cpu.mem;
fwrite (p, cpu.asregs.msize-1, 1, dumpfile);
fclose (dumpfile);
-
+
fprintf (stderr, "done.\n");
}
else if (strcmp (simargv[0], "clearstats") == 0)
void
sim_set_callbacks (host_callback *ptr)
{
- callback = ptr;
+ callback = ptr;
}
projects / binutils-gdb.git / commitdiff