vx_serial runtime API

runtime/src/vx_syscalls.c

@@ -0,0 +1,91 @@
+#include <sys/stat.h>
+#include <newlib.h>
+#include <unistd.h>
+#include <vx_intrinsics.h>
+#include <vx_print.h>
+ 
+int _close(int file) { return -1; }
+ 
+int _fstat(int file, struct stat *st) { return -1; }
+ 
+int _isatty(int file) { return 0; }
+ 
+int _lseek(int file, int ptr, int dir) { return 0; }
+ 
+int _open(const char *name, int flags, int mode) { return -1; }
+ 
+int _read(int file, char *ptr, int len) { return -1; }
+ 
+caddr_t _sbrk(int incr) { return 0; }
+ 
+int _write(int file, char *ptr, int len) {
+    int i; 
+    for (i = 0; i < len; ++i) {
+        vx_putchar(*ptr++);
+    }
+    return len;
+ }
+
+ int _kill(int pid, int sig) { return -1; }
+
+ int _getpid() {
+     return vx_warp_gid();
+ }
+
+ #ifdef HAVE_INITFINI_ARRAY
+
+/* These magic symbols are provided by the linker.  */
+extern void (*__preinit_array_start []) (void) __attribute__((weak));
+extern void (*__preinit_array_end []) (void) __attribute__((weak));
+extern void (*__init_array_start []) (void) __attribute__((weak));
+extern void (*__init_array_end []) (void) __attribute__((weak));
+
+#ifdef HAVE_INIT_FINI
+extern void _init (void);
+#endif
+
+/* Iterate over all the init routines.  */
+void
+__libc_init_array (void)
+{
+  size_t count;
+  size_t i;
+
+  count = __preinit_array_end - __preinit_array_start;
+  for (i = 0; i < count; i++)
+    __preinit_array_start[i] ();
+
+#ifdef HAVE_INIT_FINI
+  _init ();
+#endif
+
+  count = __init_array_end - __init_array_start;
+  for (i = 0; i < count; i++)
+    __init_array_start[i] ();
+}
+#endif
+
+#ifdef HAVE_INITFINI_ARRAY
+extern void (*__fini_array_start []) (void) __attribute__((weak));
+extern void (*__fini_array_end []) (void) __attribute__((weak));
+
+#ifdef HAVE_INIT_FINI
+extern void _fini (void);
+#endif
+
+/* Run all the cleanup routines.  */
+void
+__libc_fini_array (void)
+{
+  size_t count;
+  size_t i;
+  
+  count = __fini_array_end - __fini_array_start;
+  for (i = count; i > 0; i--)
+    __fini_array_start[i-1] ();
+
+#ifdef HAVE_INIT_FINI
+  _fini ();
+#endif
+}
+#endif