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[/] [or1k/] [trunk/] [newlib/] [libgloss/] [m32r/] [crtsysc.c] - Blame information for rev 39

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#include <_ansi.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <reent.h>
#include "sys/syscall.h"
 
int __trap0 (int function, int p1, int p2, int p3, struct _reent *r);
 
#define TRAP0(f, p1, p2, p3) \
__trap0 (f, (int) (p1), (int) (p2), (int) (p3), _REENT)
 
asm ("
        .text
        .global __trap0
__trap0:
        trap    #0              ; trap 0 returns result in r0, error code in r2
        cmpui   r2,#1           ; is error code zero?
        bc      .Lret           ; yes, skip setting errno
        .fillinsn
        ld      r4,@(sp)        ; no, set errno
        st      r2,@r4
.Lret:
        jmp     lr              ; return to caller
        .fillinsn
");
 
int
_open (const char *path, int flags)
{
  return TRAP0 (SYS_open, path, flags, 0);
}
 
int
_close (int file)
{
  return TRAP0 (SYS_close, file, 0, 0);
}
 
int
_read (int file, char *ptr, int len)
{
  return TRAP0 (SYS_read, file, ptr, len);
}
 
int
_lseek (int file, int ptr, int dir)
{
  return TRAP0 (SYS_lseek, file, ptr, dir);
}
 
int
_write (int file, char *ptr, int len)
{
  return TRAP0 (SYS_write, file, ptr, len);
}
 
caddr_t
_sbrk (int incr)
{
  /* `_end' is defined in the linker script.
     We must handle it carefully as we don't want the compiler to think
     it lives in the small data area.  Use medium model to ensure 32 bit
     addressability.  */
  extern char _end __attribute__ ((__model__(__medium__)));
  static char *heap_end;
  char *prev_heap_end;
  char *sp = (char *)&sp;
 
  if (heap_end == 0)
    {
      heap_end = &_end;
    }
  prev_heap_end = heap_end;
  if (heap_end > sp)
    {
      _write (1, "Heap and stack collision\n", 25);
      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
_unlink ()
{
  return -1;
}
 
/* FIXME: can we not nuke the 10,000 copies of this function
   and fudge things (which is all this function does) in _fstat?  */
int
isatty (int fd)
{
  return 1;
}
 
void
_exit (n)
{
  TRAP0 (SYS_exit, n, 0, 0);
}
 
_kill (n, m)
{
  return TRAP0 (SYS_exit, 0xdead, 0, 0);
}
 
_getpid (n)
{
  return 1;
}
 
_raise ()
{
}
 
int
_stat (const char *path, struct stat *st)
 
{
  return TRAP0 (SYS_stat, path, st, 0);
}
 
int
_chmod (const char *path, short mode)
{
  return TRAP0 (SYS_chmod, path, mode, 0);
}
 
int
_utime (path, times)
     const char *path;
     char *times;
{
  return TRAP0 (SYS_utime, path, times, 0);
}

Line No.	Rev	Author	Line
1	39	lampret	`#include <_ansi.h>`
2			`#include <sys/types.h>`
3			`#include <sys/stat.h>`
4			`#include <reent.h>`
5			`#include "sys/syscall.h"`
6
7			`int __trap0 (int function, int p1, int p2, int p3, struct _reent *r);`
8
9			`#define TRAP0(f, p1, p2, p3) \`
10			`__trap0 (f, (int) (p1), (int) (p2), (int) (p3), _REENT)`
11
12			`asm ("`
13			`.text`
14			`.global __trap0`
15			`__trap0:`
16			`trap #0 ; trap 0 returns result in r0, error code in r2`
17			`cmpui r2,#1 ; is error code zero?`
18			`bc .Lret ; yes, skip setting errno`
19			`.fillinsn`
20			`ld r4,@(sp) ; no, set errno`
21			`st r2,@r4`
22			`.Lret:`
23			`jmp lr ; return to caller`
24			`.fillinsn`
25			`");`
26
27			`int`
28			`_open (const char *path, int flags)`
29			`{`
30			`return TRAP0 (SYS_open, path, flags, 0);`
31			`}`
32
33			`int`
34			`_close (int file)`
35			`{`
36			`return TRAP0 (SYS_close, file, 0, 0);`
37			`}`
38
39			`int`
40			`_read (int file, char *ptr, int len)`
41			`{`
42			`return TRAP0 (SYS_read, file, ptr, len);`
43			`}`
44
45			`int`
46			`_lseek (int file, int ptr, int dir)`
47			`{`
48			`return TRAP0 (SYS_lseek, file, ptr, dir);`
49			`}`
50
51			`int`
52			`_write (int file, char *ptr, int len)`
53			`{`
54			`return TRAP0 (SYS_write, file, ptr, len);`
55			`}`
56
57			`caddr_t`
58			`_sbrk (int incr)`
59			`{`
60			/* `_end' is defined in the linker script.
61			`We must handle it carefully as we don't want the compiler to think`
62			`it lives in the small data area. Use medium model to ensure 32 bit`
63			`addressability. */`
64			`extern char _end __attribute__ ((__model__(__medium__)));`
65			`static char *heap_end;`
66			`char *prev_heap_end;`
67			`char sp = (char )&sp;`
68
69			`if (heap_end == 0)`
70			`{`
71			`heap_end = &_end;`
72			`}`
73			`prev_heap_end = heap_end;`
74			`if (heap_end > sp)`
75			`{`
76			`_write (1, "Heap and stack collision\n", 25);`
77			`abort ();`
78			`}`
79			`heap_end += incr;`
80			`return (caddr_t) prev_heap_end;`
81			`}`
82
83			`int`
84			`_fstat (int file, struct stat *st)`
85			`{`
86			`st->st_mode = S_IFCHR;`
87			`return 0;`
88			`}`
89
90			`int`
91			`_unlink ()`
92			`{`
93			`return -1;`
94			`}`
95
96			`/* FIXME: can we not nuke the 10,000 copies of this function`
97			`and fudge things (which is all this function does) in _fstat? */`
98			`int`
99			`isatty (int fd)`
100			`{`
101			`return 1;`
102			`}`
103
104			`void`
105			`_exit (n)`
106			`{`
107			`TRAP0 (SYS_exit, n, 0, 0);`
108			`}`
109
110			`_kill (n, m)`
111			`{`
112			`return TRAP0 (SYS_exit, 0xdead, 0, 0);`
113			`}`
114
115			`_getpid (n)`
116			`{`
117			`return 1;`
118			`}`
119
120			`_raise ()`
121			`{`
122			`}`
123
124			`int`
125			`_stat (const char path, struct stat st)`
126
127			`{`
128			`return TRAP0 (SYS_stat, path, st, 0);`
129			`}`
130
131			`int`
132			`_chmod (const char *path, short mode)`
133			`{`
134			`return TRAP0 (SYS_chmod, path, mode, 0);`
135			`}`
136
137			`int`
138			`_utime (path, times)`
139			`const char *path;`
140			`char *times;`
141			`{`
142			`return TRAP0 (SYS_utime, path, times, 0);`
143			`}`

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[/] [or1k/] [trunk/] [newlib/] [libgloss/] [m32r/] [crtsysc.c] - Blame information for rev 39