1 files changed, 99 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/metag/bits/syscalls.h b/libc/sysdeps/linux/metag/bits/syscalls.h
new file mode 100644
index 000000000..b5c8fc58c
--- /dev/null
+++ b/libc/sysdeps/linux/metag/bits/syscalls.h
@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2013 Imagination Technologies Ltd.
+ *
+ * Licensed under LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
+ *
+ */
+
+#ifndef _BITS_SYSCALLS_H
+#define _BITS_SYSCALLS_H
+#ifndef _SYSCALL_H
+# error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead."
+#endif
+
+/*
+  Meta version adapted from the ARM version.
+*/
+
+#define SYS_ify(syscall_name)  (__NR_##syscall_name)
+
+#ifdef __ASSEMBLER__
+
+/* Call a given syscall, with arguments loaded. */
+#undef DO_CALL
+#define DO_CALL(syscall_name, args)		\
+  MOV D1Re0, #SYS_ify (syscall_name);		\
+  SWITCH #0x440001
+
+#else
+
+#include <errno.h>
+
+#undef INLINE_SYSCALL_NCS
+#define INLINE_SYSCALL_NCS(name, nr, args...)				\
+(__extension__                                                          \
+  ({ unsigned int _inline_sys_result = INTERNAL_SYSCALL_NCS (name, , nr, args); \
+    if (unlikely(INTERNAL_SYSCALL_ERROR_P (_inline_sys_result, )))	\
+      {									\
+	__set_errno (INTERNAL_SYSCALL_ERRNO (_inline_sys_result, ));	\
+	_inline_sys_result = (unsigned int) -1;				\
+      }									\
+    (int) _inline_sys_result; })                                        \
+)
+
+#undef INTERNAL_SYSCALL_DECL
+#define INTERNAL_SYSCALL_DECL(err) do { } while (0)
+
+#undef INTERNAL_SYSCALL_NCS
+#define INTERNAL_SYSCALL_NCS(name, err, nr, args...)			\
+(__extension__                                                          \
+  ({unsigned int __sys_result;						\
+    {									\
+      register int _result __asm__ ("D0Re0"), _nr __asm__ ("D1Re0");	\
+      LOAD_ARGS_##nr (args);						\
+      _nr = (name);							\
+      __asm__ volatile ("SWITCH  #0x440001 ! syscall " #name		\
+			: "=r" (_result)				\
+			: "d" (_nr) ASM_ARGS_##nr			\
+			: "memory");					\
+      __sys_result = _result;						\
+    }									\
+    (int) __sys_result; })                                              \
+)
+
+#undef INTERNAL_SYSCALL_ERROR_P
+#define INTERNAL_SYSCALL_ERROR_P(val, err) \
+  ((unsigned int) (val) >= 0xfffff001u)
+
+#undef INTERNAL_SYSCALL_ERRNO
+#define INTERNAL_SYSCALL_ERRNO(val, err)	(-(val))
+
+#define LOAD_ARGS_0()
+#define ASM_ARGS_0
+#define LOAD_ARGS_1(a1)					\
+  register int _a1 __asm__ ("D1Ar1") = (int) (a1);	\
+  LOAD_ARGS_0 ()
+#define ASM_ARGS_1	ASM_ARGS_0, "d" (_a1)
+#define LOAD_ARGS_2(a1, a2)				\
+  register int _a2 __asm__ ("D0Ar2") = (int) (a2);	\
+  LOAD_ARGS_1 (a1)
+#define ASM_ARGS_2	ASM_ARGS_1, "d" (_a2)
+#define LOAD_ARGS_3(a1, a2, a3)				\
+  register int _a3 __asm__ ("D1Ar3") = (int) (a3);	\
+  LOAD_ARGS_2 (a1, a2)
+#define ASM_ARGS_3	ASM_ARGS_2, "d" (_a3)
+#define LOAD_ARGS_4(a1, a2, a3, a4)			\
+  register int _a4 __asm__ ("D0Ar4") = (int) (a4);	\
+  LOAD_ARGS_3 (a1, a2, a3)
+#define ASM_ARGS_4	ASM_ARGS_3, "d" (_a4)
+#define LOAD_ARGS_5(a1, a2, a3, a4, a5)			\
+  register int _a5 __asm__ ("D1Ar5") = (int) (a5);	\
+  LOAD_ARGS_4 (a1, a2, a3, a4)
+#define ASM_ARGS_5	ASM_ARGS_4, "d" (_a5)
+#define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6)		\
+  register int _a6 __asm__ ("D0Ar6") = (int) (a6);	\
+  LOAD_ARGS_5 (a1, a2, a3, a4, a5)
+#define ASM_ARGS_6	ASM_ARGS_5, "d" (_a6)
+
+#endif /* __ASSEMBLER__ */
+#endif /* _BITS_SYSCALLS_H */