some progress

Common/std.h

@@ -8,18 +8,35 @@
 
 #include <stdbool.h>
 #include <stddef.h>
+#include <stdint.h>
 
+#if COM_DEF_TARGET == COM_DEF_TARGET_LINUX
+#include <sys/syscall.h>
+
+static inline long com_std_syscall(long number, long arg1, long arg2,
+                                   long arg3) {
+  long ret;
+  __asm__ volatile("syscall"
+                   : "=a"(ret)
+                   : "a"(number), "D"(arg1), "S"(arg2), "d"(arg3)
+                   : "rcx", "r11", "memory");
+  return ret;
+}
+#endif
+
+/* TODO: Remove, use buffer semantics instead. */
 /* Note: Freeing is done by passing 0 size to pointer. */
-extern void *com_std_alloc(void *ptr, size_t size);
+void *com_std_alloc(void *ptr, size_t size);
 
 /* Note: Functions listed below are only available for dev builds. */
 /* Trigonometry functions are for reference testing of our own fixed point
  * implementations. Do not use otherwise. */
-extern void com_std_assert(bool holds);
-extern void com_std_printf(char const *fmt, ...);
-extern double com_std_sqrt(double v);
-extern double com_std_fabs(double v);
-extern double com_std_sin(double v);
-extern double com_std_cos(double v);
+void com_std_assert(bool holds);
+void com_std_printf(char const *fmt, ...);
+void com_std_print_str(char const *str, uint32_t len, bool newline);
+double com_std_sqrt(double v);
+double com_std_fabs(double v);
+double com_std_sin(double v);
+double com_std_cos(double v);
 
 #endif