Last change
on this file since 684 was
444,
checked in by satin@…, 7 years ago
|
add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
|
File size:
568 bytes
|
Rev | Line | |
---|
[444] | 1 | #include <_ansi.h> |
---|
| 2 | #include <sys/types.h> |
---|
| 3 | #include <sys/stat.h> |
---|
| 4 | #include "sys/syscall.h" |
---|
| 5 | |
---|
| 6 | caddr_t |
---|
| 7 | _sbrk (int incr) |
---|
| 8 | { |
---|
| 9 | extern char heap_start[]; /* Defined by the linker script. */ |
---|
| 10 | static char * heap_end = NULL; |
---|
| 11 | char * prev_heap_end; |
---|
| 12 | char * sp = (char *) & sp; |
---|
| 13 | |
---|
| 14 | if (heap_end == NULL) |
---|
| 15 | heap_end = heap_start; |
---|
| 16 | |
---|
| 17 | prev_heap_end = heap_end; |
---|
| 18 | |
---|
| 19 | if (heap_end + incr > sp) |
---|
| 20 | { |
---|
| 21 | #define MESSAGE "Heap and stack collision\n" |
---|
| 22 | _write (1, MESSAGE, sizeof MESSAGE); |
---|
| 23 | abort (); |
---|
| 24 | } |
---|
| 25 | |
---|
| 26 | heap_end += incr; |
---|
| 27 | |
---|
| 28 | return (caddr_t) prev_heap_end; |
---|
| 29 | } |
---|
Note: See
TracBrowser
for help on using the repository browser.