Import newlib and create makefile

1 files changed, 156 insertions, 0 deletions

diff --git a/newlib/libc/sys/z8ksim/glue.c b/newlib/libc/sys/z8ksim/glue.c
new file mode 100644
index 0000000..b3b0bab
--- /dev/null
+++ b/newlib/libc/sys/z8ksim/glue.c
@@ -0,0 +1,156 @@
+#include "sys/syscall.h"
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <_ansi.h>
+#include <errno.h>
+
+extern char _start_heap;
+extern char _end_heap;
+extern char _start_bss;
+extern char _end_bss;
+
+
+static int argl(long value)
+{
+  asm("ld r0,%H0" : : "r" (value));
+  asm("ld r1,%I0" : : "r" (value));
+  asm("sc %0" : : "i" (SYS_ARG)); 
+}
+
+
+static int argw(value)
+{
+  asm("ld r1,%H0" : : "r" ( value));
+  asm("ld  r0,#0");
+  asm("sc %0" : : "i" (SYS_ARG)); 
+}
+
+static int argp(void *value)
+{
+#ifdef __Z8001__  
+  asm("ld r0,%H0" : : "r" (value));
+  asm("ld r1,%I0" : : "r" (value));
+#else
+  asm("ld r1,%H0" : : "r" ( value));
+  asm("ld  r0,#0");
+#endif
+  asm("sc %0" : : "i" (SYS_ARG)); 
+
+}
+
+
+
+#define ARGL(n, value)  argl(value)
+#define ARGW(n, value)  argw(value)
+#define ARGP(n, value) argp(value)
+
+#define MACRO(n) asm("sc %0" : : "i" (n));
+
+int _read (int fd, char *buf,size_t nbytes)
+{
+  ARGW(0,fd);
+  ARGP(1,buf);
+  ARGP(2,(void *)(nbytes));
+  MACRO(SYS_read);
+}
+
+int _write (int fd, char *buf, size_t nbytes)
+{
+  ARGW(0,fd);
+  ARGP(1,buf);
+  ARGP(2,(void *)(nbytes));
+  MACRO(SYS_write);
+}
+
+int _open (const char *buf, int flags, int mode)
+{
+  ARGP(0, buf);
+  ARGW(1, flags);
+  ARGW(2, mode);
+  MACRO(SYS_open);
+}
+
+int _close (int fd)
+{
+  ARGW(0,fd);
+  MACRO(SYS_close );
+}
+
+/*
+ * sbrk -- changes heap size size. Get nbytes more
+ *         RAM. We just increment a pointer in what's
+ *         left of memory on the board.
+ */
+caddr_t _sbrk (size_t nbytes)
+{
+  static char* heap_ptr = NULL;
+  caddr_t        base;
+
+  if (heap_ptr == NULL) {
+    heap_ptr = (caddr_t)&_start_heap;
+  }
+
+  if (heap_ptr + nbytes < &_end_heap) {
+    base = heap_ptr;
+    heap_ptr += nbytes;
+    return (heap_ptr);
+  } else {
+    errno = ENOMEM;
+    return ((caddr_t)-1);
+  }
+}
+
+int isatty (int fd)
+{
+  ARGW(0,fd);
+  MACRO(SYS_isatty);
+}
+
+off_t _lseek (int fd,  off_t offset, int whence)
+{
+  ARGW(0,fd);
+  ARGL(1,offset);
+  ARGW(2, whence);
+  MACRO(SYS_lseek);
+}
+
+int _fstat (int fd, struct stat *buf)
+{
+  ARGW(0,fd);
+  ARGP(1,buf);
+  MACRO(SYS_fstat);
+}
+
+
+
+
+int
+_exit(int val)
+{
+  ARGW(0,val);
+  MACRO(SYS_exit);
+}
+
+time_t _time(time_t *timer)
+{
+  ARGP(0,timer);
+  MACRO(SYS_time);
+}
+
+int
+_creat (const char *path, int mode)
+{
+  ARGP(0, path);
+  ARGW(1, mode);
+  MACRO(SYS_creat);
+}
+
+_kill(int pid, int val)
+{
+  _exit(val);
+}
+
+_getpid() 
+{
+  return 1;
+}