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[/] [or1k/] [trunk/] [newlib/] [newlib/] [libc/] [sys/] [arm/] [syscalls.c] - Blame information for rev 1774

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/* Support files for GNU libc.  Files in the system namespace go here.
   Files in the C namespace (ie those that do not start with an
   underscore) go in .c.  */
 
#include <_ansi.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/fcntl.h>
#include <stdio.h>
#include <time.h>
#include <sys/time.h>
#include <sys/times.h>
#include <errno.h>
#include <reent.h>
#include "swi.h"
 
/* following is copied from libc/stdio/local.h to check std streams */
extern void   _EXFUN(__sinit,(struct _reent *));
#define CHECK_INIT(fp) \
  do                                    \
    {                                   \
      if ((fp)->_data == 0)             \
        (fp)->_data = _REENT;           \
      if (!(fp)->_data->__sdidinit)     \
        __sinit ((fp)->_data);          \
    }                                   \
  while (0)
 
/* Adjust our internal handles to stay away from std* handles */
#define FILE_HANDLE_OFFSET (0x20)
 
static int std_files_checked;
static int monitor_stdin;
static int monitor_stdout;
static int monitor_stderr;
 
/* Struct used to keep track of the file position, just so we
   can implement fseek(fh,x,SEEK_CUR).  */
typedef struct
{
  int handle;
  int pos;
}
poslog;
 
#define MAX_OPEN_FILES 20
static poslog openfiles [MAX_OPEN_FILES];
 
static int
findslot (int fh)
{
  int i;
  for (i = 0; i < MAX_OPEN_FILES; i ++)
    if (openfiles[i].handle == fh)
      break;
  return i;
}
 
#ifdef ARM_RDI_MONITOR
 
static inline int
do_AngelSWI (int reason, void * arg)
{
  int value;
  asm volatile ("mov r0, %1; mov r1, %2; swi %a3; mov %0, r0"
       : "=r" (value) /* Outputs */
       : "r" (reason), "r" (arg), "i" (AngelSWI) /* Inputs */
       : "r0", "r1", "lr"
                /* Clobbers r0 and r1, and lr if in supervisor mode */);
  return value;
}
#endif /* ARM_RDI_MONITOR */
 
/* Function to convert std(in|out|err) handles to internal versions */
static int
remap_handle (int fh)
{
  if (!std_files_checked)
    {
       CHECK_INIT(stdin);
       CHECK_INIT(stdout);
       CHECK_INIT(stderr);
       std_files_checked = 1;
    }
  if (fh == __sfileno (stdin))
    return monitor_stdin;
  if (fh == __sfileno (stdout))
    return monitor_stdout;
  if (fh == __sfileno (stderr))
    return monitor_stderr;
 
  return fh - FILE_HANDLE_OFFSET;
}
 
void
initialise_monitor_handles (void)
{
  int i;
 
#ifdef ARM_RDI_MONITOR
  int volatile block[3];
 
  block[0] = (int) ":tt";
  block[2] = 3;     /* length of filename */
  block[1] = 0;     /* mode "r" */
  monitor_stdin = do_AngelSWI (AngelSWI_Reason_Open, block);
 
  block[0] = (int) ":tt";
  block[2] = 3;     /* length of filename */
  block[1] = 4;     /* mode "w" */
  monitor_stdout = monitor_stderr = do_AngelSWI (AngelSWI_Reason_Open, block);
#else
  int fh;
  const char * name;
 
  name = ":tt";
  asm ("mov r0,%2; mov r1, #0; swi %a1; mov %0, r0"
       : "=r"(fh)
       : "i" (SWI_Open),"r"(name)
       : "r0","r1");
  monitor_stdin = fh;
 
  name = ":tt";
  asm ("mov r0,%2; mov r1, #4; swi %a1; mov %0, r0"
       : "=r"(fh)
       : "i" (SWI_Open),"r"(name)
       : "r0","r1");
  monitor_stdout = monitor_stderr = fh;
#endif
 
  for (i = 0; i < MAX_OPEN_FILES; i ++)
    openfiles[i].handle = -1;
 
  openfiles[0].handle = monitor_stdin;
  openfiles[0].pos = 0;
  openfiles[1].handle = monitor_stdout;
  openfiles[1].pos = 0;
}
 
static int
get_errno ()
{
#ifdef ARM_RDI_MONITOR
  return do_AngelSWI (AngelSWI_Reason_Errno, NULL);
#else
  asm ("swi %a0" :: "i" (SWI_GetErrno));
#endif
}
 
static int
error (int result)
{
  errno = get_errno ();
  return result;
}
 
static int
wrap (int result)
{
  if (result == -1)
    return error (-1);
  return result;
}
 
/* Returns # chars not! written */
 
int
_swiread (int file,
          char * ptr,
          int len)
{
  int fh = remap_handle (file);
#ifdef ARM_RDI_MONITOR
  int block[3];
 
  block[0] = fh;
  block[1] = (int) ptr;
  block[2] = len;
 
  return do_AngelSWI (AngelSWI_Reason_Read, block);
#else
  asm ("mov r0, %1; mov r1, %2;mov r2, %3; swi %a0"
       : /* No outputs */
       : "i"(SWI_Read), "r"(fh), "r"(ptr), "r"(len)
       : "r0","r1","r2");
#endif
}
 
int
_read (int file,
       char * ptr,
       int len)
{
  int slot = findslot (remap_handle (file));
  int x = _swiread (file, ptr, len);
 
  if (x < 0)
    return error (-1);
 
  if (slot != MAX_OPEN_FILES)
    openfiles [slot].pos += len - x;
 
  /* x == len is not an error, at least if we want feof() to work */
  return len - x;
}
 
int
_swilseek (int file,
        int ptr,
        int dir)
{
  int res;
  int fh = remap_handle (file);
  int slot = findslot (fh);
#ifdef ARM_RDI_MONITOR
  int block[2];
#endif
 
  if (dir == SEEK_CUR)
    {
      if (slot == MAX_OPEN_FILES)
        return -1;
      ptr = openfiles[slot].pos + ptr;
      dir = SEEK_SET;
    }
 
#ifdef ARM_RDI_MONITOR
  if (dir == SEEK_END)
    {
      block[0] = fh;
      ptr += do_AngelSWI (AngelSWI_Reason_FLen, block);
    }
 
  /* This code only does absolute seeks */
  block[0] = remap_handle (file);
  block[1] = ptr;
  res = do_AngelSWI (AngelSWI_Reason_Seek, block);
#else
  if (dir == SEEK_END)
    {
      asm ("mov r0, %2; swi %a1; mov %0, r0"
           : "=r" (res)
           : "i" (SWI_Flen), "r" (fh)
           : "r0");
      ptr += res;
    }
 
  /* This code only does absolute seeks */
  asm ("mov r0, %2; mov r1, %3; swi %a1; mov %0, r0"
       : "=r" (res)
       : "i" (SWI_Seek), "r" (fh), "r" (ptr)
       : "r0", "r1");
#endif
 
  if (slot != MAX_OPEN_FILES && res == 0)
    openfiles[slot].pos = ptr;
 
  /* This is expected to return the position in the file */
  return res == 0 ? ptr : -1;
}
 
int
_lseek (int file,
        int ptr,
        int dir)
{
  return wrap (_swilseek (file, ptr, dir));
}
 
/* Returns #chars not! written */
int
_swiwrite (
           int    file,
           char * ptr,
           int    len)
{
  int fh = remap_handle (file);
#ifdef ARM_RDI_MONITOR
  int block[3];
 
  block[0] = fh;
  block[1] = (int) ptr;
  block[2] = len;
 
  return do_AngelSWI (AngelSWI_Reason_Write, block);
#else
  asm ("mov r0, %1; mov r1, %2;mov r2, %3; swi %a0"
       : /* No outputs */
       : "i"(SWI_Write), "r"(fh), "r"(ptr), "r"(len)
       : "r0","r1","r2");
#endif
}
 
int
_write (int    file,
        char * ptr,
        int    len)
{
  int slot = findslot (remap_handle (file));
  int x = _swiwrite (file, ptr,len);
 
  if (x == -1 || x == len)
    return error (-1);
 
  if (slot != MAX_OPEN_FILES)
    openfiles[slot].pos += len - x;
 
  return len - x;
}
 
int
_swiopen (const char * path,
          int          flags)
{
  int aflags = 0, fh;
#ifdef ARM_RDI_MONITOR
  int block[3];
#endif
 
  int i = findslot (-1);
 
  if (i == MAX_OPEN_FILES)
    return -1;
 
  /* The flags are Unix-style, so we need to convert them */
#ifdef O_BINARY
  if (flags & O_BINARY)
    aflags |= 1;
#endif
 
  if (flags & O_RDWR)
    aflags |= 2;
 
  if (flags & O_CREAT)
    aflags |= 4;
 
  if (flags & O_TRUNC)
    aflags |= 4;
 
  if (flags & O_APPEND)
    {
      aflags &= ~4;     /* Can't ask for w AND a; means just 'a' */
      aflags |= 8;
    }
 
#ifdef ARM_RDI_MONITOR
  block[0] = (int) path;
  block[2] = strlen (path);
  block[1] = aflags;
 
  fh = do_AngelSWI (AngelSWI_Reason_Open, block);
 
#else
  asm ("mov r0,%2; mov r1, %3; swi %a1; mov %0, r0"
       : "=r"(fh)
       : "i" (SWI_Open),"r"(path),"r"(aflags)
       : "r0","r1");
#endif
 
  if (fh >= 0)
    {
      openfiles[i].handle = fh;
      openfiles[i].pos = 0;
    }
 
  return fh >= 0 ? fh + FILE_HANDLE_OFFSET : error (fh);
}
 
int
_open (const char * path,
       int          flags,
       ...)
{
  return wrap (_swiopen (path, flags));
}
 
int
_swiclose (int file)
{
  int myhan = remap_handle (file);
  int slot = findslot (myhan);
 
  if (slot != MAX_OPEN_FILES)
    openfiles[slot].handle = -1;
 
#ifdef ARM_RDI_MONITOR
  return do_AngelSWI (AngelSWI_Reason_Close, & myhan);
#else
  asm ("mov r0, %1; swi %a0" :: "i" (SWI_Close),"r"(myhan):"r0");
#endif
}
 
int
_close (int file)
{
  return wrap (_swiclose (file));
}
 
void
_exit (int n)
{
  /* FIXME: return code is thrown away */
 
#ifdef ARM_RDI_MONITOR
  do_AngelSWI (AngelSWI_Reason_ReportException,
              (void *) ADP_Stopped_ApplicationExit);
#else
  asm ("swi %a0" :: "i" (SWI_Exit));
#endif
}
 
int
_kill (int n, int m)
{
#ifdef ARM_RDI_MONITOR
  do_AngelSWI (AngelSWI_Reason_ReportException,
              (void *) ADP_Stopped_ApplicationExit);
#else
  asm ("swi %a0" :: "i" (SWI_Exit));
#endif
}
 
int
_getpid (int n)
{
  return 1;
}
 
register char * stack_ptr asm ("sp");
 
caddr_t
_sbrk (int incr)
{
  extern char   end asm ("end");        /* Defined by the linker */
  static char * heap_end;
  char *        prev_heap_end;
 
  if (heap_end == NULL)
    heap_end = & end;
 
  prev_heap_end = heap_end;
 
  if (heap_end + incr > stack_ptr)
    {
      _write (1, "_sbrk: Heap and stack collision\n", 32);
      abort ();
    }
 
  heap_end += incr;
 
  return (caddr_t) prev_heap_end;
}
 
int
_fstat (int           file,
        struct stat * st)
{
  st->st_mode = S_IFCHR;
  return 0;
}
 
int
_link (void)
{
  return -1;
}
 
int
_unlink (void)
{
  return -1;
}
 
void
_raise (void)
{
}
 
int
_gettimeofday (struct timeval * tp, struct timezone * tzp)
{
 
  if (tp)
    {
    /* Ask the host for the seconds since the Unix epoch */
#ifdef ARM_RDI_MONITOR
      tp->tv_sec = do_AngelSWI (AngelSWI_Reason_Time,NULL);
#else
      {
        int value;
        asm ("swi %a1; mov %0, r0" : "=r" (value): "i" (SWI_Time) : "r0");
        tp->tv_sec = value;
      }
#endif
      tp->tv_usec = 0;
    }
 
  /* Return fixed data for the timezone */
  if (tzp)
    {
      tzp->tz_minuteswest = 0;
      tzp->tz_dsttime = 0;
    }
 
  return 0;
}
 
/* Return a clock that ticks at 100Hz. */
clock_t
_times(struct tms * tp)
{
  clock_t timeval;
 
#ifdef ARM_RDI_MONITOR
  timeval = do_AngelSWI (AngelSWI_Reason_Clock,NULL);
#else
  asm ("swi %a1; mov %0, r0" : "=r" (timeval): "i" (SWI_Clock) : "r0");
#endif
 
  if (tp)
    {
      tp->tms_utime  = timeval; /* user time */
      tp->tms_stime  = 0;        /* system time */
      tp->tms_cutime = 0;        /* user time, children */
      tp->tms_cstime = 0;        /* system time, children */
    }
 
  return timeval;
};
 
 
isatty (int fd)
{
  return 1;
}
 

Line No.	Rev	Author	Line
1	56	joel	`/* Support files for GNU libc. Files in the system namespace go here.`
2			`Files in the C namespace (ie those that do not start with an`
3			`underscore) go in .c. */`
4
5	39	lampret	`#include <_ansi.h>`
6			`#include <sys/types.h>`
7			`#include <sys/stat.h>`
8			`#include <sys/fcntl.h>`
9			`#include <stdio.h>`
10			`#include <time.h>`
11			`#include <sys/time.h>`
12			`#include <sys/times.h>`
13			`#include <errno.h>`
14	56	joel	`#include <reent.h>`
15	39	lampret	`#include "swi.h"`
16
17	56	joel	`/* following is copied from libc/stdio/local.h to check std streams */`
18			`extern void _EXFUN(__sinit,(struct _reent *));`
19			`#define CHECK_INIT(fp) \`
20			`do \`
21			`{ \`
22			`if ((fp)->_data == 0) \`
23			`(fp)->_data = _REENT; \`
24			`if (!(fp)->_data->__sdidinit) \`
25			`__sinit ((fp)->_data); \`
26			`} \`
27			`while (0)`
28
29	39	lampret	`/* Adjust our internal handles to stay away from std* handles */`
30			`#define FILE_HANDLE_OFFSET (0x20)`
31
32	56	joel	`static int std_files_checked;`
33	39	lampret	`static int monitor_stdin;`
34			`static int monitor_stdout;`
35			`static int monitor_stderr;`
36
37			`/* Struct used to keep track of the file position, just so we`
38			`can implement fseek(fh,x,SEEK_CUR). */`
39			`typedef struct`
40			`{`
41			`int handle;`
42			`int pos;`
43			`}`
44			`poslog;`
45
46			`#define MAX_OPEN_FILES 20`
47			`static poslog openfiles [MAX_OPEN_FILES];`
48
49			`static int`
50			`findslot (int fh)`
51			`{`
52			`int i;`
53			`for (i = 0; i < MAX_OPEN_FILES; i ++)`
54			`if (openfiles[i].handle == fh)`
55			`break;`
56			`return i;`
57			`}`
58
59			`#ifdef ARM_RDI_MONITOR`
60
61			`static inline int`
62			`do_AngelSWI (int reason, void * arg)`
63			`{`
64			`int value;`
65			`asm volatile ("mov r0, %1; mov r1, %2; swi %a3; mov %0, r0"`
66			`: "=r" (value) /* Outputs */`
67			`: "r" (reason), "r" (arg), "i" (AngelSWI) /* Inputs */`
68			`: "r0", "r1", "lr"`
69			`/* Clobbers r0 and r1, and lr if in supervisor mode */);`
70			`return value;`
71			`}`
72			`#endif /* ARM_RDI_MONITOR */`
73
74			`/* Function to convert std(in\|out\|err) handles to internal versions */`
75			`static int`
76			`remap_handle (int fh)`
77			`{`
78	56	joel	`if (!std_files_checked)`
79			`{`
80			`CHECK_INIT(stdin);`
81			`CHECK_INIT(stdout);`
82			`CHECK_INIT(stderr);`
83			`std_files_checked = 1;`
84			`}`
85	39	lampret	`if (fh == __sfileno (stdin))`
86			`return monitor_stdin;`
87			`if (fh == __sfileno (stdout))`
88			`return monitor_stdout;`
89			`if (fh == __sfileno (stderr))`
90			`return monitor_stderr;`
91
92			`return fh - FILE_HANDLE_OFFSET;`
93			`}`
94
95			`void`
96			`initialise_monitor_handles (void)`
97			`{`
98			`int i;`
99
100			`#ifdef ARM_RDI_MONITOR`
101	56	joel	`int volatile block[3];`
102	39	lampret
103			`block[0] = (int) ":tt";`
104			`block[2] = 3; /* length of filename */`
105			`block[1] = 0; /* mode "r" */`
106			`monitor_stdin = do_AngelSWI (AngelSWI_Reason_Open, block);`
107
108			`block[0] = (int) ":tt";`
109			`block[2] = 3; /* length of filename */`
110			`block[1] = 4; /* mode "w" */`
111			`monitor_stdout = monitor_stderr = do_AngelSWI (AngelSWI_Reason_Open, block);`
112			`#else`
113			`int fh;`
114			`const char * name;`
115
116			`name = ":tt";`
117			`asm ("mov r0,%2; mov r1, #0; swi %a1; mov %0, r0"`
118			`: "=r"(fh)`
119			`: "i" (SWI_Open),"r"(name)`
120			`: "r0","r1");`
121			`monitor_stdin = fh;`
122
123			`name = ":tt";`
124			`asm ("mov r0,%2; mov r1, #4; swi %a1; mov %0, r0"`
125			`: "=r"(fh)`
126			`: "i" (SWI_Open),"r"(name)`
127			`: "r0","r1");`
128			`monitor_stdout = monitor_stderr = fh;`
129			`#endif`
130
131			`for (i = 0; i < MAX_OPEN_FILES; i ++)`
132			`openfiles[i].handle = -1;`
133
134			`openfiles[0].handle = monitor_stdin;`
135			`openfiles[0].pos = 0;`
136			`openfiles[1].handle = monitor_stdout;`
137			`openfiles[1].pos = 0;`
138			`}`
139
140			`static int`
141			`get_errno ()`
142			`{`
143			`#ifdef ARM_RDI_MONITOR`
144			`return do_AngelSWI (AngelSWI_Reason_Errno, NULL);`
145			`#else`
146			`asm ("swi %a0" :: "i" (SWI_GetErrno));`
147			`#endif`
148			`}`
149
150			`static int`
151			`error (int result)`
152			`{`
153			`errno = get_errno ();`
154			`return result;`
155			`}`
156
157			`static int`
158			`wrap (int result)`
159			`{`
160			`if (result == -1)`
161			`return error (-1);`
162			`return result;`
163			`}`
164
165			`/* Returns # chars not! written */`
166
167			`int`
168			`_swiread (int file,`
169			`char * ptr,`
170			`int len)`
171			`{`
172			`int fh = remap_handle (file);`
173			`#ifdef ARM_RDI_MONITOR`
174			`int block[3];`
175
176			`block[0] = fh;`
177			`block[1] = (int) ptr;`
178			`block[2] = len;`
179
180			`return do_AngelSWI (AngelSWI_Reason_Read, block);`
181			`#else`
182			`asm ("mov r0, %1; mov r1, %2;mov r2, %3; swi %a0"`
183			`: /* No outputs */`
184			`: "i"(SWI_Read), "r"(fh), "r"(ptr), "r"(len)`
185			`: "r0","r1","r2");`
186			`#endif`
187			`}`
188
189			`int`
190			`_read (int file,`
191			`char * ptr,`
192			`int len)`
193			`{`
194			`int slot = findslot (remap_handle (file));`
195			`int x = _swiread (file, ptr, len);`
196
197			`if (x < 0)`
198			`return error (-1);`
199
200			`if (slot != MAX_OPEN_FILES)`
201			`openfiles [slot].pos += len - x;`
202
203			`/* x == len is not an error, at least if we want feof() to work */`
204			`return len - x;`
205			`}`
206
207			`int`
208			`_swilseek (int file,`
209			`int ptr,`
210			`int dir)`
211			`{`
212			`int res;`
213			`int fh = remap_handle (file);`
214			`int slot = findslot (fh);`
215			`#ifdef ARM_RDI_MONITOR`
216			`int block[2];`
217			`#endif`
218
219			`if (dir == SEEK_CUR)`
220	56	joel	`{`
221			`if (slot == MAX_OPEN_FILES)`
222			`return -1;`
223			`ptr = openfiles[slot].pos + ptr;`
224			`dir = SEEK_SET;`
225			`}`
226
227	39	lampret	`#ifdef ARM_RDI_MONITOR`
228			`if (dir == SEEK_END)`
229	56	joel	`{`
230			`block[0] = fh;`
231			`ptr += do_AngelSWI (AngelSWI_Reason_FLen, block);`
232			`}`
233
234	39	lampret	`/* This code only does absolute seeks */`
235			`block[0] = remap_handle (file);`
236			`block[1] = ptr;`
237			`res = do_AngelSWI (AngelSWI_Reason_Seek, block);`
238			`#else`
239			`if (dir == SEEK_END)`
240	56	joel	`{`
241			`asm ("mov r0, %2; swi %a1; mov %0, r0"`
242			`: "=r" (res)`
243			`: "i" (SWI_Flen), "r" (fh)`
244			`: "r0");`
245			`ptr += res;`
246			`}`
247	39	lampret
248			`/* This code only does absolute seeks */`
249			`asm ("mov r0, %2; mov r1, %3; swi %a1; mov %0, r0"`
250			`: "=r" (res)`
251			`: "i" (SWI_Seek), "r" (fh), "r" (ptr)`
252			`: "r0", "r1");`
253			`#endif`
254
255			`if (slot != MAX_OPEN_FILES && res == 0)`
256			`openfiles[slot].pos = ptr;`
257
258			`/* This is expected to return the position in the file */`
259			`return res == 0 ? ptr : -1;`
260			`}`
261
262			`int`
263			`_lseek (int file,`
264			`int ptr,`
265			`int dir)`
266			`{`
267			`return wrap (_swilseek (file, ptr, dir));`
268			`}`
269
270			`/* Returns #chars not! written */`
271			`int`
272			`_swiwrite (`
273	56	joel	`int file,`
274			`char * ptr,`
275			`int len)`
276	39	lampret	`{`
277			`int fh = remap_handle (file);`
278			`#ifdef ARM_RDI_MONITOR`
279			`int block[3];`
280
281			`block[0] = fh;`
282			`block[1] = (int) ptr;`
283			`block[2] = len;`
284
285			`return do_AngelSWI (AngelSWI_Reason_Write, block);`
286			`#else`
287			`asm ("mov r0, %1; mov r1, %2;mov r2, %3; swi %a0"`
288			`: /* No outputs */`
289			`: "i"(SWI_Write), "r"(fh), "r"(ptr), "r"(len)`
290			`: "r0","r1","r2");`
291			`#endif`
292			`}`
293
294			`int`
295	56	joel	`_write (int file,`
296			`char * ptr,`
297			`int len)`
298	39	lampret	`{`
299			`int slot = findslot (remap_handle (file));`
300			`int x = _swiwrite (file, ptr,len);`
301
302			`if (x == -1 \|\| x == len)`
303			`return error (-1);`
304
305			`if (slot != MAX_OPEN_FILES)`
306			`openfiles[slot].pos += len - x;`
307
308			`return len - x;`
309			`}`
310
311			`int`
312			`_swiopen (const char * path,`
313	56	joel	`int flags)`
314	39	lampret	`{`
315			`int aflags = 0, fh;`
316			`#ifdef ARM_RDI_MONITOR`
317			`int block[3];`
318			`#endif`
319
320			`int i = findslot (-1);`
321
322			`if (i == MAX_OPEN_FILES)`
323			`return -1;`
324
325			`/* The flags are Unix-style, so we need to convert them */`
326			`#ifdef O_BINARY`
327			`if (flags & O_BINARY)`
328			`aflags \|= 1;`
329			`#endif`
330
331			`if (flags & O_RDWR)`
332			`aflags \|= 2;`
333
334			`if (flags & O_CREAT)`
335			`aflags \|= 4;`
336
337			`if (flags & O_TRUNC)`
338			`aflags \|= 4;`
339
340			`if (flags & O_APPEND)`
341			`{`
342			`aflags &= ~4; /* Can't ask for w AND a; means just 'a' */`
343			`aflags \|= 8;`
344			`}`
345
346			`#ifdef ARM_RDI_MONITOR`
347			`block[0] = (int) path;`
348			`block[2] = strlen (path);`
349			`block[1] = aflags;`
350
351			`fh = do_AngelSWI (AngelSWI_Reason_Open, block);`
352
353			`#else`
354			`asm ("mov r0,%2; mov r1, %3; swi %a1; mov %0, r0"`
355			`: "=r"(fh)`
356			`: "i" (SWI_Open),"r"(path),"r"(aflags)`
357			`: "r0","r1");`
358			`#endif`
359
360			`if (fh >= 0)`
361			`{`
362			`openfiles[i].handle = fh;`
363			`openfiles[i].pos = 0;`
364			`}`
365
366			`return fh >= 0 ? fh + FILE_HANDLE_OFFSET : error (fh);`
367			`}`
368
369			`int`
370	56	joel	`_open (const char * path,`
371			`int flags,`
372			`...)`
373	39	lampret	`{`
374			`return wrap (_swiopen (path, flags));`
375			`}`
376
377			`int`
378			`_swiclose (int file)`
379			`{`
380			`int myhan = remap_handle (file);`
381			`int slot = findslot (myhan);`
382
383			`if (slot != MAX_OPEN_FILES)`
384			`openfiles[slot].handle = -1;`
385
386			`#ifdef ARM_RDI_MONITOR`
387			`return do_AngelSWI (AngelSWI_Reason_Close, & myhan);`
388			`#else`
389			`asm ("mov r0, %1; swi %a0" :: "i" (SWI_Close),"r"(myhan):"r0");`
390			`#endif`
391			`}`
392
393			`int`
394			`_close (int file)`
395			`{`
396			`return wrap (_swiclose (file));`
397			`}`
398
399			`void`
400	56	joel	`_exit (int n)`
401	39	lampret	`{`
402	56	joel	`/* FIXME: return code is thrown away */`
403
404	39	lampret	`#ifdef ARM_RDI_MONITOR`
405			`do_AngelSWI (AngelSWI_Reason_ReportException,`
406			`(void *) ADP_Stopped_ApplicationExit);`
407			`#else`
408			`asm ("swi %a0" :: "i" (SWI_Exit));`
409			`#endif`
410			`}`
411
412			`int`
413	56	joel	`_kill (int n, int m)`
414	39	lampret	`{`
415			`#ifdef ARM_RDI_MONITOR`
416			`do_AngelSWI (AngelSWI_Reason_ReportException,`
417			`(void *) ADP_Stopped_ApplicationExit);`
418			`#else`
419			`asm ("swi %a0" :: "i" (SWI_Exit));`
420			`#endif`
421			`}`
422
423			`int`
424	56	joel	`_getpid (int n)`
425	39	lampret	`{`
426			`return 1;`
427			`}`
428
429	56	joel	`register char * stack_ptr asm ("sp");`
430	39	lampret
431			`caddr_t`
432			`_sbrk (int incr)`
433			`{`
434	56	joel	`extern char end asm ("end"); /* Defined by the linker */`
435			`static char * heap_end;`
436			`char * prev_heap_end;`
437	39	lampret
438			`if (heap_end == NULL)`
439	56	joel	`heap_end = & end;`
440	39	lampret
441			`prev_heap_end = heap_end;`
442
443			`if (heap_end + incr > stack_ptr)`
444			`{`
445			`_write (1, "_sbrk: Heap and stack collision\n", 32);`
446			`abort ();`
447			`}`
448
449			`heap_end += incr;`
450
451			`return (caddr_t) prev_heap_end;`
452			`}`
453
454			`int`
455	56	joel	`_fstat (int file,`
456			`struct stat * st)`
457	39	lampret	`{`
458			`st->st_mode = S_IFCHR;`
459			`return 0;`
460			`}`
461
462			`int`
463	56	joel	`_link (void)`
464	39	lampret	`{`
465			`return -1;`
466			`}`
467
468	56	joel	`int`
469			`_unlink (void)`
470	39	lampret	`{`
471	56	joel	`return -1;`
472	39	lampret	`}`
473
474	56	joel	`void`
475			`_raise (void)`
476	39	lampret	`{`
477			`}`
478
479			`int`
480	56	joel	`_gettimeofday (struct timeval * tp, struct timezone * tzp)`
481	39	lampret	`{`
482
483			`if (tp)`
484			`{`
485			`/* Ask the host for the seconds since the Unix epoch */`
486			`#ifdef ARM_RDI_MONITOR`
487	56	joel	`tp->tv_sec = do_AngelSWI (AngelSWI_Reason_Time,NULL);`
488	39	lampret	`#else`
489			`{`
490			`int value;`
491			`asm ("swi %a1; mov %0, r0" : "=r" (value): "i" (SWI_Time) : "r0");`
492			`tp->tv_sec = value;`
493			`}`
494			`#endif`
495			`tp->tv_usec = 0;`
496			`}`
497
498			`/* Return fixed data for the timezone */`
499			`if (tzp)`
500			`{`

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