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[/] [or1k/] [trunk/] [insight/] [sim/] [arm/] [armos.c] - Blame information for rev 1765

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/*  armos.c -- ARMulator OS interface:  ARM6 Instruction Emulator.
    Copyright (C) 1994 Advanced RISC Machines Ltd.
 
    This program 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 of the License, or
    (at your option) any later version.
 
    This program 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 contains a model of Demon, ARM Ltd's Debug Monitor,
   including all the SWI's required to support the C library. The code in
   it is not really for the faint-hearted (especially the abort handling
   code), but it is a complete example. Defining NOOS will disable all the
   fun, and definign VAILDATE will define SWI 1 to enter SVC mode, and SWI
   0x11 to halt the emulator.  */
 
#include "config.h"
#include "ansidecl.h"
 
#include <time.h>
#include <errno.h>
#include <string.h>
#include <fcntl.h>
 
#ifndef O_RDONLY
#define O_RDONLY 0
#endif
#ifndef O_WRONLY
#define O_WRONLY 1
#endif
#ifndef O_RDWR
#define O_RDWR   2
#endif
#ifndef O_BINARY
#define O_BINARY 0
#endif
 
#ifdef __STDC__
#define unlink(s) remove(s)
#endif
 
#ifdef HAVE_UNISTD_H
#include <unistd.h>             /* For SEEK_SET etc */
#endif
 
#ifdef __riscos
extern int _fisatty (FILE *);
#define isatty_(f) _fisatty(f)
#else
#ifdef __ZTC__
#include <io.h>
#define isatty_(f) isatty((f)->_file)
#else
#ifdef macintosh
#include <ioctl.h>
#define isatty_(f) (~ioctl ((f)->_file, FIOINTERACTIVE, NULL))
#else
#define isatty_(f) isatty (fileno (f))
#endif
#endif
#endif
 
#include "armdefs.h"
#include "armos.h"
#include "armemu.h"
 
#ifndef NOOS
#ifndef VALIDATE
/* #ifndef ASIM */
#include "armfpe.h"
/* #endif */
#endif
#endif
 
/* For RDIError_BreakpointReached.  */
#include "dbg_rdi.h"
 
extern unsigned ARMul_OSInit (ARMul_State * state);
extern void ARMul_OSExit (ARMul_State * state);
extern unsigned ARMul_OSHandleSWI (ARMul_State * state, ARMword number);
extern unsigned ARMul_OSException (ARMul_State * state, ARMword vector,
                                   ARMword pc);
extern ARMword ARMul_OSLastErrorP (ARMul_State * state);
extern ARMword ARMul_Debug (ARMul_State * state, ARMword pc, ARMword instr);
 
#define BUFFERSIZE 4096
#ifndef FOPEN_MAX
#define FOPEN_MAX 64
#endif
#define UNIQUETEMPS 256
 
/* OS private Information.  */
 
struct OSblock
{
  ARMword Time0;
  ARMword ErrorP;
  ARMword ErrorNo;
  FILE *FileTable[FOPEN_MAX];
  char FileFlags[FOPEN_MAX];
  char *tempnames[UNIQUETEMPS];
};
 
#define NOOP 0
#define BINARY 1
#define READOP 2
#define WRITEOP 4
 
#ifdef macintosh
#define FIXCRLF(t,c) ((t & BINARY) ? \
                      c : \
                      ((c == '\n' || c == '\r' ) ? (c ^ 7) : c) \
                     )
#else
#define FIXCRLF(t,c) c
#endif
 
static ARMword softvectorcode[] =
{
  /* Basic: swi tidyexception + event; mov pc, lr;
     ldmia r11,{r11,pc}; swi generateexception  + event.  */
  0xef000090, 0xe1a0e00f, 0xe89b8800, 0xef000080, /* Reset */
  0xef000091, 0xe1a0e00f, 0xe89b8800, 0xef000081, /* Undef */
  0xef000092, 0xe1a0e00f, 0xe89b8800, 0xef000082, /* SWI */
  0xef000093, 0xe1a0e00f, 0xe89b8800, 0xef000083, /* Prefetch abort */
  0xef000094, 0xe1a0e00f, 0xe89b8800, 0xef000084, /* Data abort */
  0xef000095, 0xe1a0e00f, 0xe89b8800, 0xef000085, /* Address exception */
  0xef000096, 0xe1a0e00f, 0xe89b8800, 0xef000086, /* IRQ */
  0xef000097, 0xe1a0e00f, 0xe89b8800, 0xef000087, /* FIQ */
  0xef000098, 0xe1a0e00f, 0xe89b8800, 0xef000088, /* Error */
  0xe1a0f00e                    /* Default handler */
};
 
/* Time for the Operating System to initialise itself.  */
 
unsigned
ARMul_OSInit (ARMul_State * state)
{
#ifndef NOOS
#ifndef VALIDATE
  ARMword instr, i, j;
  struct OSblock *OSptr = (struct OSblock *) state->OSptr;
 
  if (state->OSptr == NULL)
    {
      state->OSptr = (unsigned char *) malloc (sizeof (struct OSblock));
      if (state->OSptr == NULL)
        {
          perror ("OS Memory");
          exit (15);
        }
    }
 
  OSptr = (struct OSblock *) state->OSptr;
  OSptr->ErrorP = 0;
  state->Reg[13] = ADDRSUPERSTACK;      /* set up a stack for the current mode */
  ARMul_SetReg (state, SVC32MODE, 13, ADDRSUPERSTACK);  /* and for supervisor mode */
  ARMul_SetReg (state, ABORT32MODE, 13, ADDRSUPERSTACK);        /* and for abort 32 mode */
  ARMul_SetReg (state, UNDEF32MODE, 13, ADDRSUPERSTACK);        /* and for undef 32 mode */
  ARMul_SetReg (state, SYSTEMMODE, 13, ADDRSUPERSTACK); /* and for system mode */
  instr = 0xe59ff000 | (ADDRSOFTVECTORS - 8);   /* load pc from soft vector */
 
  for (i = ARMul_ResetV; i <= ARMFIQV; i += 4)
    ARMul_WriteWord (state, i, instr);  /* write hardware vectors */
 
  SWI_vector_installed = 0;
 
  for (i = ARMul_ResetV; i <= ARMFIQV + 4; i += 4)
    {
      ARMul_WriteWord (state, ADDRSOFTVECTORS + i, SOFTVECTORCODE + i * 4);
      ARMul_WriteWord (state, ADDRSOFHANDLERS + 2 * i + 4L,
                       SOFTVECTORCODE + sizeof (softvectorcode) - 4L);
    }
 
  for (i = 0; i < sizeof (softvectorcode); i += 4)
    ARMul_WriteWord (state, SOFTVECTORCODE + i, softvectorcode[i / 4]);
 
  for (i = 0; i < FOPEN_MAX; i++)
    OSptr->FileTable[i] = NULL;
 
  for (i = 0; i < UNIQUETEMPS; i++)
    OSptr->tempnames[i] = NULL;
 
  ARMul_ConsolePrint (state, ", Demon 1.01");
 
/* #ifndef ASIM */
 
  /* install fpe */
  for (i = 0; i < fpesize; i += 4)       /* copy the code */
    ARMul_WriteWord (state, FPESTART + i, fpecode[i >> 2]);
 
  for (i = FPESTART + fpesize;; i -= 4)
    {                           /* reverse the error strings */
      if ((j = ARMul_ReadWord (state, i)) == 0xffffffff)
        break;
      if (state->bigendSig && j < 0x80000000)
        {                       /* it's part of the string so swap it */
          j = ((j >> 0x18) & 0x000000ff) |
            ((j >> 0x08) & 0x0000ff00) |
            ((j << 0x08) & 0x00ff0000) | ((j << 0x18) & 0xff000000);
          ARMul_WriteWord (state, i, j);
        }
    }
 
  ARMul_WriteWord (state, FPEOLDVECT, ARMul_ReadWord (state, 4));       /* copy old illegal instr vector */
  ARMul_WriteWord (state, 4, FPENEWVECT (ARMul_ReadWord (state, i - 4)));       /* install new vector */
  ARMul_ConsolePrint (state, ", FPE");
 
/* #endif  ASIM */
#endif /* VALIDATE */
#endif /* NOOS */
 
  return TRUE;
}
 
void
ARMul_OSExit (ARMul_State * state)
{
  free ((char *) state->OSptr);
}
 
 
/* Return the last Operating System Error.  */
 
ARMword ARMul_OSLastErrorP (ARMul_State * state)
{
  return ((struct OSblock *) state->OSptr)->ErrorP;
}
 
static int translate_open_mode[] =
{
  O_RDONLY,                     /* "r"   */
  O_RDONLY + O_BINARY,          /* "rb"  */
  O_RDWR,                       /* "r+"  */
  O_RDWR + O_BINARY,            /* "r+b" */
  O_WRONLY + O_CREAT + O_TRUNC, /* "w"   */
  O_WRONLY + O_BINARY + O_CREAT + O_TRUNC,      /* "wb"  */
  O_RDWR + O_CREAT + O_TRUNC,   /* "w+"  */
  O_RDWR + O_BINARY + O_CREAT + O_TRUNC,        /* "w+b" */
  O_WRONLY + O_APPEND + O_CREAT,        /* "a"   */
  O_WRONLY + O_BINARY + O_APPEND + O_CREAT,     /* "ab"  */
  O_RDWR + O_APPEND + O_CREAT,  /* "a+"  */
  O_RDWR + O_BINARY + O_APPEND + O_CREAT        /* "a+b" */
};
 
static void
SWIWrite0 (ARMul_State * state, ARMword addr)
{
  ARMword temp;
  struct OSblock *OSptr = (struct OSblock *) state->OSptr;
 
  while ((temp = ARMul_SafeReadByte (state, addr++)) != 0)
    (void) fputc ((char) temp, stdout);
 
  OSptr->ErrorNo = errno;
}
 
static void
WriteCommandLineTo (ARMul_State * state, ARMword addr)
{
  ARMword temp;
  char *cptr = state->CommandLine;
 
  if (cptr == NULL)
    cptr = "\0";
  do
    {
      temp = (ARMword) * cptr++;
      ARMul_SafeWriteByte (state, addr++, temp);
    }
  while (temp != 0);
}
 
static void
SWIopen (ARMul_State * state, ARMword name, ARMword SWIflags)
{
  struct OSblock *OSptr = (struct OSblock *) state->OSptr;
  char dummy[2000];
  int flags;
  int i;
 
  for (i = 0; (dummy[i] = ARMul_SafeReadByte (state, name + i)); i++)
    ;
 
  /* Now we need to decode the Demon open mode.  */
  flags = translate_open_mode[SWIflags];
 
  /* Filename ":tt" is special: it denotes stdin/out.  */
  if (strcmp (dummy, ":tt") == 0)
    {
      if (flags == O_RDONLY)    /* opening tty "r" */
        state->Reg[0] = 0;        /* stdin */
      else
        state->Reg[0] = 1;       /* stdout */
    }
  else
    {
      state->Reg[0] = (int) open (dummy, flags, 0666);
      OSptr->ErrorNo = errno;
    }
}
 
static void
SWIread (ARMul_State * state, ARMword f, ARMword ptr, ARMword len)
{
  struct OSblock *OSptr = (struct OSblock *) state->OSptr;
  int res;
  int i;
  char *local = malloc (len);
 
  if (local == NULL)
    {
      fprintf (stderr, "sim: Unable to read 0x%ulx bytes - out of memory\n",
               len);
      return;
    }
 
  res = read (f, local, len);
  if (res > 0)
    for (i = 0; i < res; i++)
      ARMul_SafeWriteByte (state, ptr + i, local[i]);
 
  free (local);
  state->Reg[0] = res == -1 ? -1 : len - res;
  OSptr->ErrorNo = errno;
}
 
static void
SWIwrite (ARMul_State * state, ARMword f, ARMword ptr, ARMword len)
{
  struct OSblock *OSptr = (struct OSblock *) state->OSptr;
  int res;
  ARMword i;
  char *local = malloc (len);
 
  if (local == NULL)
    {
      fprintf (stderr, "sim: Unable to write 0x%lx bytes - out of memory\n",
               (long) len);
      return;
    }
 
  for (i = 0; i < len; i++)
    local[i] = ARMul_SafeReadByte (state, ptr + i);
 
  res = write (f, local, len);
  state->Reg[0] = res == -1 ? -1 : len - res;
  free (local);
 
  OSptr->ErrorNo = errno;
}
 
static void
SWIflen (ARMul_State * state, ARMword fh)
{
  struct OSblock *OSptr = (struct OSblock *) state->OSptr;
  ARMword addr;
 
  if (fh == 0 || fh > FOPEN_MAX)
    {
      OSptr->ErrorNo = EBADF;
      state->Reg[0] = -1L;
      return;
    }
 
  addr = lseek (fh, 0, SEEK_CUR);
 
  state->Reg[0] = lseek (fh, 0L, SEEK_END);
  (void) lseek (fh, addr, SEEK_SET);
 
  OSptr->ErrorNo = errno;
}
 
/* The emulator calls this routine when a SWI instruction is encuntered.
   The parameter passed is the SWI number (lower 24 bits of the instruction).  */
 
unsigned
ARMul_OSHandleSWI (ARMul_State * state, ARMword number)
{
  ARMword          addr;
  ARMword          temp;
  ARMword          saved_number = 0;
  struct OSblock * OSptr = (struct OSblock *) state->OSptr;
 
  /* Intel do not want DEMON SWI support.  */
  if (state->is_XScale)
    switch (number)
    {
    case SWI_Read:
    case SWI_Write:
    case SWI_Open:
    case SWI_Clock:
    case SWI_Time:
    case SWI_Close:
    case SWI_Flen:
    case SWI_Exit:
    case SWI_Seek:
    case SWI_WriteC:
    case SWI_Write0:
    case SWI_GetErrno:
    case SWI_GetEnv:
      saved_number = number;
      number = -1;
    default:
      break;
    }
 
  switch (number)
    {
    case SWI_Read:
      SWIread (state, state->Reg[0], state->Reg[1], state->Reg[2]);
      break;
 
    case SWI_Write:
      SWIwrite (state, state->Reg[0], state->Reg[1], state->Reg[2]);
      break;
 
    case SWI_Open:
      SWIopen (state, state->Reg[0], state->Reg[1]);
      break;
 
    case SWI_Clock:
      /* Return number of centi-seconds.  */
      state->Reg[0] =
#ifdef CLOCKS_PER_SEC
        (CLOCKS_PER_SEC >= 100)
        ? (ARMword) (clock () / (CLOCKS_PER_SEC / 100))
        : (ARMword) ((clock () * 100) / CLOCKS_PER_SEC);
#else
        /* Presume unix... clock() returns microseconds.  */
        (ARMword) (clock () / 10000);
#endif
      OSptr->ErrorNo = errno;
      break;
 
    case SWI_Time:
      state->Reg[0] = (ARMword) time (NULL);
      OSptr->ErrorNo = errno;
      break;
 
    case SWI_Close:
      state->Reg[0] = close (state->Reg[0]);
      OSptr->ErrorNo = errno;
      break;
 
    case SWI_Flen:
      SWIflen (state, state->Reg[0]);
      break;
 
    case SWI_Exit:
      state->Emulate = FALSE;
      break;
 
    case SWI_Seek:
      /* We must return non-zero for failure.  */
      state->Reg[0] = -1 >= lseek (state->Reg[0], state->Reg[1], SEEK_SET);
      OSptr->ErrorNo = errno;
      break;
 
    case SWI_WriteC:
      (void) fputc ((int) state->Reg[0], stdout);
      OSptr->ErrorNo = errno;
      break;
 
    case SWI_Write0:
      SWIWrite0 (state, state->Reg[0]);
      break;
 
    case SWI_GetErrno:
      state->Reg[0] = OSptr->ErrorNo;
      break;
 
    case SWI_GetEnv:
      state->Reg[0] = ADDRCMDLINE;
      if (state->MemSize)
        state->Reg[1] = state->MemSize;
      else
        state->Reg[1] = ADDRUSERSTACK;
 
      WriteCommandLineTo (state, state->Reg[0]);
      break;
 
    case SWI_Breakpoint:
      state->EndCondition = RDIError_BreakpointReached;
      state->Emulate = FALSE;
      break;
 
      /* Handle Angel SWIs as well as Demon ones.  */
    case AngelSWI_ARM:
    case AngelSWI_Thumb:
      /* R1 is almost always a parameter block.  */
      addr = state->Reg[1];
      /* R0 is a reason code.  */
      switch (state->Reg[0])
        {
          /* Unimplemented reason codes.  */
        case AngelSWI_Reason_ReadC:
        case AngelSWI_Reason_IsTTY:
        case AngelSWI_Reason_TmpNam:
        case AngelSWI_Reason_Remove:
        case AngelSWI_Reason_Rename:
        case AngelSWI_Reason_System:
        case AngelSWI_Reason_EnterSVC:
        default:
          state->Emulate = FALSE;
          return FALSE;
 
        case AngelSWI_Reason_Clock:
          /* Return number of centi-seconds.  */
          state->Reg[0] =
#ifdef CLOCKS_PER_SEC
            (CLOCKS_PER_SEC >= 100)
            ? (ARMword) (clock () / (CLOCKS_PER_SEC / 100))
            : (ARMword) ((clock () * 100) / CLOCKS_PER_SEC);
#else
            /* Presume unix... clock() returns microseconds.  */
            (ARMword) (clock () / 10000);
#endif
          OSptr->ErrorNo = errno;
          break;
 
        case AngelSWI_Reason_Time:
          state->Reg[0] = (ARMword) time (NULL);
          OSptr->ErrorNo = errno;
          break;
 
        case AngelSWI_Reason_WriteC:
          (void) fputc ((int) ARMul_SafeReadByte (state, addr), stdout);
          OSptr->ErrorNo = errno;
          /* Fall thgrough.  */
 
        case AngelSWI_Reason_Write0:
          SWIWrite0 (state, addr);
          break;
 
        case AngelSWI_Reason_Close:
          state->Reg[0] = close (ARMul_ReadWord (state, addr));
          OSptr->ErrorNo = errno;
          break;
 
        case AngelSWI_Reason_Seek:
          state->Reg[0] = -1 >= lseek (ARMul_ReadWord (state, addr),
                                       ARMul_ReadWord (state, addr + 4),
                                       SEEK_SET);
          OSptr->ErrorNo = errno;
          break;
 
        case AngelSWI_Reason_FLen:
          SWIflen (state, ARMul_ReadWord (state, addr));
          break;
 
        case AngelSWI_Reason_GetCmdLine:
          WriteCommandLineTo (state, ARMul_ReadWord (state, addr));
          break;
 
        case AngelSWI_Reason_HeapInfo:
          /* R1 is a pointer to a pointer.  */
          addr = ARMul_ReadWord (state, addr);
 
          /* Pick up the right memory limit.  */
          if (state->MemSize)
            temp = state->MemSize;
          else
            temp = ADDRUSERSTACK;
 
          ARMul_WriteWord (state, addr, 0);      /* Heap base */
          ARMul_WriteWord (state, addr + 4, temp);      /* Heap limit */
          ARMul_WriteWord (state, addr + 8, temp);      /* Stack base */
          ARMul_WriteWord (state, addr + 12, temp);     /* Stack limit */
          break;
 
        case AngelSWI_Reason_ReportException:
          if (state->Reg[1] == ADP_Stopped_ApplicationExit)
            state->Reg[0] = 0;
          else
            state->Reg[0] = -1;
          state->Emulate = FALSE;
          break;
 
        case ADP_Stopped_ApplicationExit:
          state->Reg[0] = 0;
          state->Emulate = FALSE;
          break;
 
        case ADP_Stopped_RunTimeError:
          state->Reg[0] = -1;
          state->Emulate = FALSE;
          break;
 
        case AngelSWI_Reason_Errno:
          state->Reg[0] = OSptr->ErrorNo;
          break;
 
        case AngelSWI_Reason_Open:
          SWIopen (state,
                   ARMul_ReadWord (state, addr),
                   ARMul_ReadWord (state, addr + 4));
          break;
 
        case AngelSWI_Reason_Read:
          SWIread (state,
                   ARMul_ReadWord (state, addr),
                   ARMul_ReadWord (state, addr + 4),
                   ARMul_ReadWord (state, addr + 8));
          break;
 
        case AngelSWI_Reason_Write:
          SWIwrite (state,
                    ARMul_ReadWord (state, addr),
                    ARMul_ReadWord (state, addr + 4),
                    ARMul_ReadWord (state, addr + 8));
          break;
        }
 
    case 0x90:
    case 0x91:
    case 0x92:
      /* These are used by the FPE code.  */
      break;
 
    default:
      /* If there is a SWI vector installed use it.  */
      if (state->is_XScale && saved_number != -1)
        number = saved_number;
 
      if (SWI_vector_installed && number != SWI_Breakpoint)
        {
          ARMword cpsr;
          ARMword i_size;
 
          cpsr = ARMul_GetCPSR (state);
          i_size = INSN_SIZE;
 
          ARMul_SetSPSR (state, SVC32MODE, cpsr);
 
          cpsr &= ~0xbf;
          cpsr |= SVC32MODE | 0x80;
          ARMul_SetCPSR (state, cpsr);
 
          state->RegBank[SVCBANK][14] = state->Reg[14] = state->Reg[15] - i_size;
          state->NextInstr            = RESUME;
          state->Reg[15]              = state->pc = ARMSWIV;
          FLUSHPIPE;
        }
      else
        {
          fprintf (stderr, "unknown SWI encountered - %x - ignoring\n", number);
          return FALSE;
        }
    }
 
  return TRUE;
}
 
#ifndef NOOS
#ifndef ASIM
 
/* The emulator calls this routine when an Exception occurs.  The second
   parameter is the address of the relevant exception vector.  Returning
   FALSE from this routine causes the trap to be taken, TRUE causes it to
   be ignored (so set state->Emulate to FALSE!).  */
 
unsigned
ARMul_OSException (ARMul_State * state  ATTRIBUTE_UNUSED,
                   ARMword       vector ATTRIBUTE_UNUSED,
                   ARMword       pc     ATTRIBUTE_UNUSED)
{
  return FALSE;
}
 
#endif
#endif /* NOOS */

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[/] [or1k/] [trunk/] [insight/] [sim/] [arm/] [armos.c] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	578	markom	`/* armos.c -- ARMulator OS interface: ARM6 Instruction Emulator.`
2			`Copyright (C) 1994 Advanced RISC Machines Ltd.`
3
4			`This program is free software; you can redistribute it and/or modify`
5			`it under the terms of the GNU General Public License as published by`
6			`the Free Software Foundation; either version 2 of the License, or`
7			`(at your option) any later version.`
8
9			`This program is distributed in the hope that it will be useful,`
10			`but WITHOUT ANY WARRANTY; without even the implied warranty of`
11			`MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the`
12			`GNU General Public License for more details.`
13
14			`You should have received a copy of the GNU General Public License`
15			`along with this program; if not, write to the Free Software`
16			`Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */`
17
18			`/* This file contains a model of Demon, ARM Ltd's Debug Monitor,`
19			`including all the SWI's required to support the C library. The code in`
20			`it is not really for the faint-hearted (especially the abort handling`
21			`code), but it is a complete example. Defining NOOS will disable all the`
22			`fun, and definign VAILDATE will define SWI 1 to enter SVC mode, and SWI`
23			`0x11 to halt the emulator. */`
24
25			`#include "config.h"`
26			`#include "ansidecl.h"`
27
28			`#include <time.h>`
29			`#include <errno.h>`
30			`#include <string.h>`
31			`#include <fcntl.h>`
32
33			`#ifndef O_RDONLY`
34			`#define O_RDONLY 0`
35			`#endif`
36			`#ifndef O_WRONLY`
37			`#define O_WRONLY 1`
38			`#endif`
39			`#ifndef O_RDWR`
40			`#define O_RDWR 2`
41			`#endif`
42			`#ifndef O_BINARY`
43			`#define O_BINARY 0`
44			`#endif`
45
46			`#ifdef __STDC__`
47			`#define unlink(s) remove(s)`
48			`#endif`
49
50			`#ifdef HAVE_UNISTD_H`
51			`#include <unistd.h> /* For SEEK_SET etc */`
52			`#endif`
53
54			`#ifdef __riscos`
55			`extern int _fisatty (FILE *);`
56			`#define isatty_(f) _fisatty(f)`
57			`#else`
58			`#ifdef __ZTC__`
59			`#include <io.h>`
60			`#define isatty_(f) isatty((f)->_file)`
61			`#else`
62			`#ifdef macintosh`
63			`#include <ioctl.h>`
64			`#define isatty_(f) (~ioctl ((f)->_file, FIOINTERACTIVE, NULL))`
65			`#else`
66			`#define isatty_(f) isatty (fileno (f))`
67			`#endif`
68			`#endif`
69			`#endif`
70
71			`#include "armdefs.h"`
72			`#include "armos.h"`
73			`#include "armemu.h"`
74
75			`#ifndef NOOS`
76			`#ifndef VALIDATE`
77			`/* #ifndef ASIM */`
78			`#include "armfpe.h"`
79			`/* #endif */`
80			`#endif`
81			`#endif`
82
83			`/* For RDIError_BreakpointReached. */`
84			`#include "dbg_rdi.h"`
85
86			`extern unsigned ARMul_OSInit (ARMul_State * state);`
87			`extern void ARMul_OSExit (ARMul_State * state);`
88			`extern unsigned ARMul_OSHandleSWI (ARMul_State * state, ARMword number);`
89			`extern unsigned ARMul_OSException (ARMul_State * state, ARMword vector,`
90			`ARMword pc);`
91			`extern ARMword ARMul_OSLastErrorP (ARMul_State * state);`
92			`extern ARMword ARMul_Debug (ARMul_State * state, ARMword pc, ARMword instr);`
93
94			`#define BUFFERSIZE 4096`
95			`#ifndef FOPEN_MAX`
96			`#define FOPEN_MAX 64`
97			`#endif`
98			`#define UNIQUETEMPS 256`
99
100			`/* OS private Information. */`
101
102			`struct OSblock`
103			`{`
104			`ARMword Time0;`
105			`ARMword ErrorP;`
106			`ARMword ErrorNo;`
107			`FILE *FileTable[FOPEN_MAX];`
108			`char FileFlags[FOPEN_MAX];`
109			`char *tempnames[UNIQUETEMPS];`
110			`};`
111
112			`#define NOOP 0`
113			`#define BINARY 1`
114			`#define READOP 2`
115			`#define WRITEOP 4`
116
117			`#ifdef macintosh`
118			`#define FIXCRLF(t,c) ((t & BINARY) ? \`
119			`c : \`
120			`((c == '\n' \|\| c == '\r' ) ? (c ^ 7) : c) \`
121			`)`
122			`#else`
123			`#define FIXCRLF(t,c) c`
124			`#endif`
125
126			`static ARMword softvectorcode[] =`
127			`{`
128			`/* Basic: swi tidyexception + event; mov pc, lr;`
129			`ldmia r11,{r11,pc}; swi generateexception + event. */`
130			`0xef000090, 0xe1a0e00f, 0xe89b8800, 0xef000080, /* Reset */`
131			`0xef000091, 0xe1a0e00f, 0xe89b8800, 0xef000081, /* Undef */`
132			`0xef000092, 0xe1a0e00f, 0xe89b8800, 0xef000082, /* SWI */`
133			`0xef000093, 0xe1a0e00f, 0xe89b8800, 0xef000083, /* Prefetch abort */`
134			`0xef000094, 0xe1a0e00f, 0xe89b8800, 0xef000084, /* Data abort */`
135			`0xef000095, 0xe1a0e00f, 0xe89b8800, 0xef000085, /* Address exception */`
136			`0xef000096, 0xe1a0e00f, 0xe89b8800, 0xef000086, /* IRQ */`
137			`0xef000097, 0xe1a0e00f, 0xe89b8800, 0xef000087, /* FIQ */`
138			`0xef000098, 0xe1a0e00f, 0xe89b8800, 0xef000088, /* Error */`
139			`0xe1a0f00e /* Default handler */`
140			`};`
141
142			`/* Time for the Operating System to initialise itself. */`
143
144			`unsigned`
145			`ARMul_OSInit (ARMul_State * state)`
146			`{`
147			`#ifndef NOOS`
148			`#ifndef VALIDATE`
149			`ARMword instr, i, j;`
150			`struct OSblock OSptr = (struct OSblock ) state->OSptr;`
151
152			`if (state->OSptr == NULL)`
153			`{`
154			`state->OSptr = (unsigned char *) malloc (sizeof (struct OSblock));`
155			`if (state->OSptr == NULL)`
156			`{`
157			`perror ("OS Memory");`
158			`exit (15);`
159			`}`
160			`}`
161
162			`OSptr = (struct OSblock *) state->OSptr;`
163			`OSptr->ErrorP = 0;`
164			`state->Reg[13] = ADDRSUPERSTACK; /* set up a stack for the current mode */`
165			`ARMul_SetReg (state, SVC32MODE, 13, ADDRSUPERSTACK); /* and for supervisor mode */`
166			`ARMul_SetReg (state, ABORT32MODE, 13, ADDRSUPERSTACK); /* and for abort 32 mode */`
167			`ARMul_SetReg (state, UNDEF32MODE, 13, ADDRSUPERSTACK); /* and for undef 32 mode */`
168			`ARMul_SetReg (state, SYSTEMMODE, 13, ADDRSUPERSTACK); /* and for system mode */`
169			`instr = 0xe59ff000 \| (ADDRSOFTVECTORS - 8); /* load pc from soft vector */`
170
171			`for (i = ARMul_ResetV; i <= ARMFIQV; i += 4)`
172			`ARMul_WriteWord (state, i, instr); /* write hardware vectors */`
173
174			`SWI_vector_installed = 0;`
175
176			`for (i = ARMul_ResetV; i <= ARMFIQV + 4; i += 4)`
177			`{`
178			`ARMul_WriteWord (state, ADDRSOFTVECTORS + i, SOFTVECTORCODE + i * 4);`
179			`ARMul_WriteWord (state, ADDRSOFHANDLERS + 2 * i + 4L,`
180			`SOFTVECTORCODE + sizeof (softvectorcode) - 4L);`
181			`}`
182
183			`for (i = 0; i < sizeof (softvectorcode); i += 4)`
184			`ARMul_WriteWord (state, SOFTVECTORCODE + i, softvectorcode[i / 4]);`
185
186			`for (i = 0; i < FOPEN_MAX; i++)`
187			`OSptr->FileTable[i] = NULL;`
188
189			`for (i = 0; i < UNIQUETEMPS; i++)`
190			`OSptr->tempnames[i] = NULL;`
191
192			`ARMul_ConsolePrint (state, ", Demon 1.01");`
193
194			`/* #ifndef ASIM */`
195
196			`/* install fpe */`
197			`for (i = 0; i < fpesize; i += 4) /* copy the code */`
198			`ARMul_WriteWord (state, FPESTART + i, fpecode[i >> 2]);`
199
200			`for (i = FPESTART + fpesize;; i -= 4)`
201			`{ /* reverse the error strings */`
202			`if ((j = ARMul_ReadWord (state, i)) == 0xffffffff)`
203			`break;`
204			`if (state->bigendSig && j < 0x80000000)`
205			`{ /* it's part of the string so swap it */`
206			`j = ((j >> 0x18) & 0x000000ff) \|`
207			`((j >> 0x08) & 0x0000ff00) \|`
208			`((j << 0x08) & 0x00ff0000) \| ((j << 0x18) & 0xff000000);`
209			`ARMul_WriteWord (state, i, j);`
210			`}`
211			`}`
212
213			`ARMul_WriteWord (state, FPEOLDVECT, ARMul_ReadWord (state, 4)); /* copy old illegal instr vector */`
214			`ARMul_WriteWord (state, 4, FPENEWVECT (ARMul_ReadWord (state, i - 4))); /* install new vector */`
215			`ARMul_ConsolePrint (state, ", FPE");`
216
217			`/* #endif ASIM */`
218			`#endif /* VALIDATE */`
219			`#endif /* NOOS */`
220
221			`return TRUE;`
222			`}`
223
224			`void`
225			`ARMul_OSExit (ARMul_State * state)`
226			`{`
227			`free ((char *) state->OSptr);`
228			`}`
229
230
231			`/* Return the last Operating System Error. */`
232
233			`ARMword ARMul_OSLastErrorP (ARMul_State * state)`
234			`{`
235			`return ((struct OSblock *) state->OSptr)->ErrorP;`
236			`}`
237
238			`static int translate_open_mode[] =`
239			`{`
240			`O_RDONLY, /* "r" */`
241			`O_RDONLY + O_BINARY, /* "rb" */`
242			`O_RDWR, /* "r+" */`
243			`O_RDWR + O_BINARY, /* "r+b" */`
244			`O_WRONLY + O_CREAT + O_TRUNC, /* "w" */`
245			`O_WRONLY + O_BINARY + O_CREAT + O_TRUNC, /* "wb" */`
246			`O_RDWR + O_CREAT + O_TRUNC, /* "w+" */`
247			`O_RDWR + O_BINARY + O_CREAT + O_TRUNC, /* "w+b" */`
248			`O_WRONLY + O_APPEND + O_CREAT, /* "a" */`
249			`O_WRONLY + O_BINARY + O_APPEND + O_CREAT, /* "ab" */`
250			`O_RDWR + O_APPEND + O_CREAT, /* "a+" */`
251			`O_RDWR + O_BINARY + O_APPEND + O_CREAT /* "a+b" */`
252			`};`
253
254			`static void`
255			`SWIWrite0 (ARMul_State * state, ARMword addr)`
256			`{`
257			`ARMword temp;`
258			`struct OSblock OSptr = (struct OSblock ) state->OSptr;`
259
260			`while ((temp = ARMul_SafeReadByte (state, addr++)) != 0)`
261			`(void) fputc ((char) temp, stdout);`
262
263			`OSptr->ErrorNo = errno;`
264			`}`
265
266			`static void`
267			`WriteCommandLineTo (ARMul_State * state, ARMword addr)`
268			`{`
269			`ARMword temp;`
270			`char *cptr = state->CommandLine;`
271
272			`if (cptr == NULL)`
273			`cptr = "\0";`
274			`do`
275			`{`
276			`temp = (ARMword) * cptr++;`
277			`ARMul_SafeWriteByte (state, addr++, temp);`
278			`}`
279			`while (temp != 0);`
280			`}`
281
282			`static void`
283			`SWIopen (ARMul_State * state, ARMword name, ARMword SWIflags)`
284			`{`
285			`struct OSblock OSptr = (struct OSblock ) state->OSptr;`
286			`char dummy[2000];`
287			`int flags;`
288			`int i;`
289
290			`for (i = 0; (dummy[i] = ARMul_SafeReadByte (state, name + i)); i++)`
291			`;`
292
293			`/* Now we need to decode the Demon open mode. */`
294			`flags = translate_open_mode[SWIflags];`
295
296			`/* Filename ":tt" is special: it denotes stdin/out. */`
297			`if (strcmp (dummy, ":tt") == 0)`
298			`{`
299			`if (flags == O_RDONLY) /* opening tty "r" */`
300			`state->Reg[0] = 0; /* stdin */`
301			`else`
302			`state->Reg[0] = 1; /* stdout */`
303			`}`
304			`else`
305			`{`
306			`state->Reg[0] = (int) open (dummy, flags, 0666);`
307			`OSptr->ErrorNo = errno;`
308			`}`
309			`}`
310
311			`static void`
312			`SWIread (ARMul_State * state, ARMword f, ARMword ptr, ARMword len)`
313			`{`
314			`struct OSblock OSptr = (struct OSblock ) state->OSptr;`
315			`int res;`
316			`int i;`
317			`char *local = malloc (len);`
318
319			`if (local == NULL)`
320			`{`
321			`fprintf (stderr, "sim: Unable to read 0x%ulx bytes - out of memory\n",`
322			`len);`
323			`return;`
324			`}`
325
326			`res = read (f, local, len);`
327			`if (res > 0)`
328			`for (i = 0; i < res; i++)`
329			`ARMul_SafeWriteByte (state, ptr + i, local[i]);`
330
331			`free (local);`
332			`state->Reg[0] = res == -1 ? -1 : len - res;`
333			`OSptr->ErrorNo = errno;`
334			`}`
335
336			`static void`
337			`SWIwrite (ARMul_State * state, ARMword f, ARMword ptr, ARMword len)`
338			`{`
339			`struct OSblock OSptr = (struct OSblock ) state->OSptr;`
340			`int res;`
341			`ARMword i;`
342			`char *local = malloc (len);`
343
344			`if (local == NULL)`
345			`{`
346			`fprintf (stderr, "sim: Unable to write 0x%lx bytes - out of memory\n",`
347			`(long) len);`
348			`return;`
349			`}`
350
351			`for (i = 0; i < len; i++)`
352			`local[i] = ARMul_SafeReadByte (state, ptr + i);`
353
354			`res = write (f, local, len);`
355			`state->Reg[0] = res == -1 ? -1 : len - res;`
356			`free (local);`
357
358			`OSptr->ErrorNo = errno;`
359			`}`
360
361			`static void`
362			`SWIflen (ARMul_State * state, ARMword fh)`
363			`{`
364			`struct OSblock OSptr = (struct OSblock ) state->OSptr;`
365			`ARMword addr;`
366
367			`if (fh == 0 \|\| fh > FOPEN_MAX)`
368			`{`
369			`OSptr->ErrorNo = EBADF;`
370			`state->Reg[0] = -1L;`
371			`return;`
372			`}`
373
374			`addr = lseek (fh, 0, SEEK_CUR);`
375
376			`state->Reg[0] = lseek (fh, 0L, SEEK_END);`
377			`(void) lseek (fh, addr, SEEK_SET);`
378
379			`OSptr->ErrorNo = errno;`
380			`}`
381
382			`/* The emulator calls this routine when a SWI instruction is encuntered.`
383			`The parameter passed is the SWI number (lower 24 bits of the instruction). */`
384
385			`unsigned`
386			`ARMul_OSHandleSWI (ARMul_State * state, ARMword number)`
387			`{`
388			`ARMword addr;`
389			`ARMword temp;`
390			`ARMword saved_number = 0;`
391			`struct OSblock * OSptr = (struct OSblock *) state->OSptr;`
392
393			`/* Intel do not want DEMON SWI support. */`
394			`if (state->is_XScale)`
395			`switch (number)`
396			`{`
397			`case SWI_Read:`
398			`case SWI_Write:`
399			`case SWI_Open:`
400			`case SWI_Clock:`
401			`case SWI_Time:`
402			`case SWI_Close:`
403			`case SWI_Flen:`
404			`case SWI_Exit:`
405			`case SWI_Seek:`
406			`case SWI_WriteC:`
407			`case SWI_Write0:`
408			`case SWI_GetErrno:`
409			`case SWI_GetEnv:`
410			`saved_number = number;`
411			`number = -1;`
412			`default:`
413			`break;`
414			`}`
415
416			`switch (number)`
417			`{`
418			`case SWI_Read:`
419			`SWIread (state, state->Reg[0], state->Reg[1], state->Reg[2]);`
420			`break;`
421
422			`case SWI_Write:`
423			`SWIwrite (state, state->Reg[0], state->Reg[1], state->Reg[2]);`
424			`break;`
425
426			`case SWI_Open:`
427			`SWIopen (state, state->Reg[0], state->Reg[1]);`
428			`break;`
429
430			`case SWI_Clock:`
431			`/* Return number of centi-seconds. */`
432			`state->Reg[0] =`
433			`#ifdef CLOCKS_PER_SEC`
434			`(CLOCKS_PER_SEC >= 100)`
435			`? (ARMword) (clock () / (CLOCKS_PER_SEC / 100))`
436			`: (ARMword) ((clock () * 100) / CLOCKS_PER_SEC);`
437			`#else`
438			`/* Presume unix... clock() returns microseconds. */`
439			`(ARMword) (clock () / 10000);`
440			`#endif`
441			`OSptr->ErrorNo = errno;`
442			`break;`
443
444			`case SWI_Time:`
445			`state->Reg[0] = (ARMword) time (NULL);`
446			`OSptr->ErrorNo = errno;`
447			`break;`
448
449			`case SWI_Close:`
450			`state->Reg[0] = close (state->Reg[0]);`
451			`OSptr->ErrorNo = errno;`
452			`break;`
453
454			`case SWI_Flen:`
455			`SWIflen (state, state->Reg[0]);`
456			`break;`
457
458			`case SWI_Exit:`
459			`state->Emulate = FALSE;`
460			`break;`
461
462			`case SWI_Seek:`
463			`/* We must return non-zero for failure. */`
464			`state->Reg[0] = -1 >= lseek (state->Reg[0], state->Reg[1], SEEK_SET);`
465			`OSptr->ErrorNo = errno;`
466			`break;`
467
468			`case SWI_WriteC:`
469			`(void) fputc ((int) state->Reg[0], stdout);`
470			`OSptr->ErrorNo = errno;`
471			`break;`
472
473			`case SWI_Write0:`
474			`SWIWrite0 (state, state->Reg[0]);`
475			`break;`
476
477			`case SWI_GetErrno:`
478			`state->Reg[0] = OSptr->ErrorNo;`
479			`break;`
480
481			`case SWI_GetEnv:`
482			`state->Reg[0] = ADDRCMDLINE;`
483			`if (state->MemSize)`
484			`state->Reg[1] = state->MemSize;`
485			`else`
486			`state->Reg[1] = ADDRUSERSTACK;`
487
488			`WriteCommandLineTo (state, state->Reg[0]);`
489			`break;`
490
491			`case SWI_Breakpoint:`
492			`state->EndCondition = RDIError_BreakpointReached;`
493			`state->Emulate = FALSE;`
494			`break;`
495
496			`/* Handle Angel SWIs as well as Demon ones. */`
497			`case AngelSWI_ARM:`
498			`case AngelSWI_Thumb:`
499			`/* R1 is almost always a parameter block. */`
500			`addr = state->Reg[1];`
501			`/* R0 is a reason code. */`
502			`switch (state->Reg[0])`
503			`{`
504			`/* Unimplemented reason codes. */`
505			`case AngelSWI_Reason_ReadC:`
506			`case AngelSWI_Reason_IsTTY:`
507			`case AngelSWI_Reason_TmpNam:`
508			`case AngelSWI_Reason_Remove:`
509			`case AngelSWI_Reason_Rename:`
510			`case AngelSWI_Reason_System:`
511			`case AngelSWI_Reason_EnterSVC:`
512			`default:`
513			`state->Emulate = FALSE;`
514			`return FALSE;`
515
516			`case AngelSWI_Reason_Clock:`
517			`/* Return number of centi-seconds. */`
518			`state->Reg[0] =`
519			`#ifdef CLOCKS_PER_SEC`
520			`(CLOCKS_PER_SEC >= 100)`
521			`? (ARMword) (clock () / (CLOCKS_PER_SEC / 100))`
522			`: (ARMword) ((clock () * 100) / CLOCKS_PER_SEC);`
523			`#else`
524			`/* Presume unix... clock() returns microseconds. */`
525			`(ARMword) (clock () / 10000);`
526			`#endif`
527			`OSptr->ErrorNo = errno;`
528			`break;`
529
530			`case AngelSWI_Reason_Time:`
531			`state->Reg[0] = (ARMword) time (NULL);`
532			`OSptr->ErrorNo = errno;`
533			`break;`
534
535			`case AngelSWI_Reason_WriteC:`
536			`(void) fputc ((int) ARMul_SafeReadByte (state, addr), stdout);`
537			`OSptr->ErrorNo = errno;`
538			`/* Fall thgrough. */`
539
540			`case AngelSWI_Reason_Write0:`
541			`SWIWrite0 (state, addr);`
542			`break;`
543
544			`case AngelSWI_Reason_Close:`
545			`state->Reg[0] = close (ARMul_ReadWord (state, addr));`
546			`OSptr->ErrorNo = errno;`
547			`break;`
548
549			`case AngelSWI_Reason_Seek:`
550			`state->Reg[0] = -1 >= lseek (ARMul_ReadWord (state, addr),`
551			`ARMul_ReadWord (state, addr + 4),`
552			`SEEK_SET);`
553			`OSptr->ErrorNo = errno;`
554			`break;`
555
556			`case AngelSWI_Reason_FLen:`
557			`SWIflen (state, ARMul_ReadWord (state, addr));`
558			`break;`
559
560			`case AngelSWI_Reason_GetCmdLine:`
561			`WriteCommandLineTo (state, ARMul_ReadWord (state, addr));`
562			`break;`
563
564			`case AngelSWI_Reason_HeapInfo:`
565			`/* R1 is a pointer to a pointer. */`
566			`addr = ARMul_ReadWord (state, addr);`
567
568			`/* Pick up the right memory limit. */`
569			`if (state->MemSize)`
570			`temp = state->MemSize;`
571			`else`
572			`temp = ADDRUSERSTACK;`
573
574			`ARMul_WriteWord (state, addr, 0); /* Heap base */`
575			`ARMul_WriteWord (state, addr + 4, temp); /* Heap limit */`
576			`ARMul_WriteWord (state, addr + 8, temp); /* Stack base */`
577			`ARMul_WriteWord (state, addr + 12, temp); /* Stack limit */`
578			`break;`
579
580			`case AngelSWI_Reason_ReportException:`
581			`if (state->Reg[1] == ADP_Stopped_ApplicationExit)`
582			`state->Reg[0] = 0;`
583			`else`
584			`state->Reg[0] = -1;`
585			`state->Emulate = FALSE;`
586			`break;`
587
588			`case ADP_Stopped_ApplicationExit:`
589			`state->Reg[0] = 0;`
590			`state->Emulate = FALSE;`
591			`break;`
592
593			`case ADP_Stopped_RunTimeError:`
594			`state->Reg[0] = -1;`
595			`state->Emulate = FALSE;`
596			`break;`
597
598			`case AngelSWI_Reason_Errno:`
599			`state->Reg[0] = OSptr->ErrorNo;`
600			`break;`
601
602			`case AngelSWI_Reason_Open:`
603			`SWIopen (state,`
604			`ARMul_ReadWord (state, addr),`
605			`ARMul_ReadWord (state, addr + 4));`
606			`break;`
607
608			`case AngelSWI_Reason_Read:`
609			`SWIread (state,`
610			`ARMul_ReadWord (state, addr),`
611			`ARMul_ReadWord (state, addr + 4),`
612			`ARMul_ReadWord (state, addr + 8));`
613			`break;`
614
615			`case AngelSWI_Reason_Write:`
616			`SWIwrite (state,`
617			`ARMul_ReadWord (state, addr),`
618			`ARMul_ReadWord (state, addr + 4),`
619			`ARMul_ReadWord (state, addr + 8));`
620			`break;`
621			`}`
622
623			`case 0x90:`
624			`case 0x91:`
625			`case 0x92:`
626			`/* These are used by the FPE code. */`
627			`break;`
628
629			`default:`
630			`/* If there is a SWI vector installed use it. */`
631			`if (state->is_XScale && saved_number != -1)`
632			`number = saved_number;`
633
634			`if (SWI_vector_installed && number != SWI_Breakpoint)`
635			`{`
636			`ARMword cpsr;`
637			`ARMword i_size;`
638
639			`cpsr = ARMul_GetCPSR (state);`
640			`i_size = INSN_SIZE;`
641
642			`ARMul_SetSPSR (state, SVC32MODE, cpsr);`
643
644			`cpsr &= ~0xbf;`
645			`cpsr \|= SVC32MODE \| 0x80;`
646			`ARMul_SetCPSR (state, cpsr);`
647
648			`state->RegBank[SVCBANK][14] = state->Reg[14] = state->Reg[15] - i_size;`
649			`state->NextInstr = RESUME;`
650			`state->Reg[15] = state->pc = ARMSWIV;`
651			`FLUSHPIPE;`
652			`}`
653			`else`
654			`{`
655			`fprintf (stderr, "unknown SWI encountered - %x - ignoring\n", number);`
656			`return FALSE;`
657			`}`
658			`}`
659
660			`return TRUE;`
661			`}`
662
663			`#ifndef NOOS`
664			`#ifndef ASIM`
665
666			`/* The emulator calls this routine when an Exception occurs. The second`
667			`parameter is the address of the relevant exception vector. Returning`
668			`FALSE from this routine causes the trap to be taken, TRUE causes it to`
669			`be ignored (so set state->Emulate to FALSE!). */`
670
671			`unsigned`
672			`ARMul_OSException (ARMul_State * state ATTRIBUTE_UNUSED,`
673			`ARMword vector ATTRIBUTE_UNUSED,`
674			`ARMword pc ATTRIBUTE_UNUSED)`
675			`{`
676			`return FALSE;`
677			`}`
678
679			`#endif`
680			`#endif /* NOOS */`