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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [libgloss/] [m68hc11/] [syscalls.c] - Rev 296
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/* pseudo system calls for M68HC11 & M68HC12. * Copyright (C) 1999, 2000, 2001, 2002 Stephane Carrez (stcarrez@nerim.fr) * * The authors hereby grant permission to use, copy, modify, distribute, * and license this software and its documentation for any purpose, provided * that existing copyright notices are retained in all copies and that this * notice is included verbatim in any distributions. No written agreement, * license, or royalty fee is required for any of the authorized uses. * Modifications to this software may be copyrighted by their authors * and need not follow the licensing terms described here, provided that * the new terms are clearly indicated on the first page of each file where * they apply. */ #include <sys/types.h> #include <sys/stat.h> #include <unistd.h> extern void outbyte(char c); extern char inbyte(void); int read(int file, void *p, size_t nbytes) { int i = 0; char* buf = (char*) p; for (i = 0; i < nbytes; i++) { *(buf + i) = inbyte(); if ((*(buf + i) == '\n') || (*(buf + i) == '\r')) { i++; break; } } return (i); } int write(int file, const void *p, size_t len) { const char *ptr = (const char*) p; int todo; for (todo = len; todo; --todo) { outbyte (*ptr++); } return(len); } void * sbrk(ptrdiff_t incr) { extern char _end; /* Defined by the linker */ static char *heap_end; char *prev_heap_end; register char *stack_ptr asm ("sp"); if (heap_end == 0) { heap_end = &_end; } prev_heap_end = heap_end; if (heap_end + incr > stack_ptr) { write (1, "Heap and stack collision\n", 25); abort (); } heap_end += incr; return ((void*) prev_heap_end); } /* end of syscalls.c */
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