1 files changed, 80 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/kvx/bits/syscalls.h b/libc/sysdeps/linux/kvx/bits/syscalls.h
new file mode 100644
index 000000000..71bd5e4fe
--- /dev/null
+++ b/libc/sysdeps/linux/kvx/bits/syscalls.h
@@ -0,0 +1,80 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2018 Kalray Inc.
+ */
+
+#ifndef _BITS_SYSCALLS_H
+#define _BITS_SYSCALLS_H
+#ifndef _SYSCALL_H
+# error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead."
+#endif
+
+#ifndef __ASSEMBLER__
+
+#define INTERNAL_SYSCALL_NCS(name, err, nr, args...)                    \
+ 	({									\
+		register long _ret __asm__("r0");			\
+		register unsigned long _scno  __asm__("r6") = name;	\
+		LOAD_ARGS_##nr (args)					\
+		__asm__ __volatile__("scall %[r_scno]"			\
+				     : "=r" (_ret)			\
+				     : [r_scno] "r" (_scno) ASM_ARGS_##nr \
+				     : ASM_CLOBBER_##nr);		\
+		_ret;							\
+	})
+
+/* Mark all argument registers as per ABI in the range r1-r5 as
+   clobbered when they are not used for the invocation of the scall */
+#define ASM_CLOBBER_6 "cc", "memory",					\
+    "r7", "r8", "r9", "r10", "r11", /* unused argument registers */ \
+    "r15", /* struct pointer */						\
+    "r16", "r17", /* veneer registers */				\
+    "r32", "r33", "r34", "r35", "r36", "r37", "r38", "r39", /* 32->63 are caller-saved */ \
+    "r40", "r41", "r42", "r43", "r44", "r45", "r46", "r47",		\
+    "r48", "r49", "r50", "r51", "r52", "r53", "r54", "r55",		\
+    "r56", "r57", "r58", "r59", "r60", "r61", "r62", "r63"
+#define ASM_CLOBBER_5 "r5", ASM_CLOBBER_6
+#define ASM_CLOBBER_4 "r4", ASM_CLOBBER_5
+#define ASM_CLOBBER_3 "r3", ASM_CLOBBER_4
+#define ASM_CLOBBER_2 "r2", ASM_CLOBBER_3
+#define ASM_CLOBBER_1 "r1", ASM_CLOBBER_2
+#define ASM_CLOBBER_0 ASM_CLOBBER_1
+
+#define LOAD_ARGS_0()
+#define ASM_ARGS_0
+
+#define LOAD_ARGS_1(a1)                                 \
+	LOAD_ARGS_0();					\
+	_ret  = (long) a1;
+#define ASM_ARGS_1      ASM_ARGS_0, "r"(_ret)
+
+#define LOAD_ARGS_2(a1, a2)                             \
+	LOAD_ARGS_1(a1);				\
+	register long _a2 __asm__("r1") = (long) a2;
+#define ASM_ARGS_2      ASM_ARGS_1, "r"(_a2)
+
+#define LOAD_ARGS_3(a1, a2, a3)                         \
+	LOAD_ARGS_2(a1, a2);				\
+	register long _a3 __asm__("r2") = (long) a3;
+#define ASM_ARGS_3      ASM_ARGS_2, "r"(_a3)
+
+#define LOAD_ARGS_4(a1, a2, a3, a4)                     \
+	LOAD_ARGS_3(a1, a2, a3);			\
+	register long _a4 __asm__("r3") = (long) a4;
+#define ASM_ARGS_4      ASM_ARGS_3, "r"(_a4)
+
+#define LOAD_ARGS_5(a1, a2, a3, a4, a5)                 \
+	LOAD_ARGS_4(a1, a2, a3, a4);			\
+	register long _a5 __asm__("r4") = (long) a5;
+#define ASM_ARGS_5      ASM_ARGS_4, "r"(_a5)
+
+#define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6)             \
+	LOAD_ARGS_5(a1, a2, a3, a4, a5);		\
+	register long _a6 __asm__("r5") = (long) a6;
+#define ASM_ARGS_6      ASM_ARGS_5, "r"(_a6)
+
+#endif /* __ASSEMBLER__ */
+#endif /* _BITS_SYSCALLS_H */