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comparison syscalls.c @ 0:c59513fd84fb

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Initial commit of STM32 test code.
author Daniel O'Connor <darius@dons.net.au>
date Mon, 03 Oct 2011 21:19:15 +1030
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children 74e9b3baac1e
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-1:000000000000 0:c59513fd84fb
1 /*
2 * syscalls.c
3 *
4 * Created on: 03.12.2009
5 * Author: Martin Thomas, 3BSD license
6 */
7
8 //#define SBRK_VERBOSE 1
9
10 #include <stdio.h>
11 #include <reent.h>
12 #include <errno.h>
13 #include <stdlib.h> /* abort */
14 #include <sys/types.h>
15 #include <sys/stat.h>
16
17 #include "comm.h"
18 #include "stm32f10x.h" /* for _get_PSP() from core_cm3.h*/
19
20 #undef errno
21 extern int errno;
22
23 int
24 _kill(int pid, int sig) {
25 pid = pid; sig = sig; /* avoid warnings */
26 errno = EINVAL;
27 return -1;
28 }
29
30 void _exit(int status) {
31 printf("_exit called with parameter %d\n", status);
32 while(1)
33 ;
34 }
35
36 int
37 _getpid(void) {
38 return 1;
39 }
40
41
42 extern char _end; /* Defined by the linker */
43 static char *heap_end;
44
45 char *
46 get_heap_end(void) {
47 return (char*) heap_end;
48 }
49
50 char *
51 get_stack_top(void) {
52 return (char*) __get_MSP();
53 //return (char*) __get_PSP();
54 }
55
56 caddr_t
57 _sbrk(int incr) {
58 char *prev_heap_end;
59 #if SBRK_VERBOSE
60 printf("_sbrk called with incr %d\n", incr);
61 #endif
62 if (heap_end == 0) {
63 heap_end = &_end;
64 }
65 prev_heap_end = heap_end;
66 #if 1
67 if (heap_end + incr > get_stack_top()) {
68 printf("Heap and stack collision\n");
69 abort();
70 }
71 #endif
72 heap_end += incr;
73 return (caddr_t) prev_heap_end;
74 }
75
76 int
77 _close(int file) {
78 file = file; /* avoid warning */
79 return -1;
80 }
81
82 int
83 _fstat(int file, struct stat *st) {
84 file = file; /* avoid warning */
85 st->st_mode = S_IFCHR;
86 return 0;
87 }
88
89 int
90 _isatty(int file) {
91 file = file; /* avoid warning */
92 return 1;
93 }
94
95 int
96 _lseek(int file, int ptr, int dir) {
97 file = file; /* avoid warning */
98 ptr = ptr; /* avoid warning */
99 dir = dir; /* avoid warning */
100 return 0;
101 }
102
103 int
104 _read(int file, char *ptr, int len) {
105 file = file; /* avoid warning */
106 ptr = ptr; /* avoid warning */
107 len = len; /* avoid warning */
108 return 0;
109 }
110
111 int
112 _write(int file, char *ptr, int len) {
113 int todo;
114
115 file = file; /* avoid warning */
116 for (todo = 0; todo < len; todo++) {
117 comm_put(*ptr++);
118 }
119 return len;
120 }