add m68k port

three ABIs are supported: the default with 68881 80-bit fpu format and
results returned in floating point registers, softfloat-only with the
same format, and coldfire fpu with IEEE single/double only. only the
first is tested at all, and only under qemu which has fpu emulation
bugs.

basic functionality smoke tests have been performed for the most
common arch-specific breakage via libc-test and qemu user-level
emulation. some sysvipc failures remain, but are shared with other big
endian archs and will be fixed separately.

1 files changed, 90 insertions, 0 deletions

diff --git a/arch/m68k/syscall_arch.h b/arch/m68k/syscall_arch.h
new file mode 100644
index 00000000..53a4256f
--- /dev/null
+++ b/arch/m68k/syscall_arch.h
@@ -0,0 +1,90 @@
+#define __SYSCALL_LL_E(x) \
+((union { long long ll; long l[2]; }){ .ll = x }).l[0], \
+((union { long long ll; long l[2]; }){ .ll = x }).l[1]
+#define __SYSCALL_LL_O(x) __SYSCALL_LL_E((x))
+
+static __inline long __syscall0(long n)
+{
+	register unsigned long d0 __asm__("d0") = n;
+	__asm__ __volatile__ ("trap #0" : "+r"(d0)
+		:
+		: "memory");
+	return d0;
+}
+
+static inline long __syscall1(long n, long a)
+{
+	register unsigned long d0 __asm__("d0") = n;
+	register unsigned long d1 __asm__("d1") = a;
+	__asm__ __volatile__ ("trap #0" : "+r"(d0)
+		: "r"(d1)
+		: "memory");
+	return d0;
+}
+
+static inline long __syscall2(long n, long a, long b)
+{
+	register unsigned long d0 __asm__("d0") = n;
+	register unsigned long d1 __asm__("d1") = a;
+	register unsigned long d2 __asm__("d2") = b;
+	__asm__ __volatile__ ("trap #0" : "+r"(d0)
+		: "r"(d1), "r"(d2)
+		: "memory");
+	return d0;
+}
+
+static inline long __syscall3(long n, long a, long b, long c)
+{
+	register unsigned long d0 __asm__("d0") = n;
+	register unsigned long d1 __asm__("d1") = a;
+	register unsigned long d2 __asm__("d2") = b;
+	register unsigned long d3 __asm__("d3") = c;
+	__asm__ __volatile__ ("trap #0" : "+r"(d0)
+		: "r"(d1), "r"(d2), "r"(d3)
+		: "memory");
+	return d0;
+}
+
+static inline long __syscall4(long n, long a, long b, long c, long d)
+{
+	register unsigned long d0 __asm__("d0") = n;
+	register unsigned long d1 __asm__("d1") = a;
+	register unsigned long d2 __asm__("d2") = b;
+	register unsigned long d3 __asm__("d3") = c;
+	register unsigned long d4 __asm__("d4") = d;
+	__asm__ __volatile__ ("trap #0" : "+r"(d0)
+		: "r"(d1), "r"(d2), "r"(d3), "r"(d4)
+		: "memory");
+	return d0;
+}
+
+static inline long __syscall5(long n, long a, long b, long c, long d, long e)
+{
+	register unsigned long d0 __asm__("d0") = n;
+	register unsigned long d1 __asm__("d1") = a;
+	register unsigned long d2 __asm__("d2") = b;
+	register unsigned long d3 __asm__("d3") = c;
+	register unsigned long d4 __asm__("d4") = d;
+	register unsigned long d5 __asm__("d5") = e;
+	__asm__ __volatile__ ("trap #0" : "+r"(d0)
+		: "r"(d1), "r"(d2), "r"(d3), "r"(d4), "r"(d5)
+		: "memory");
+	return d0;
+}
+
+static inline long __syscall6(long n, long a, long b, long c, long d, long e, long f)
+{
+	register unsigned long d0 __asm__("d0") = n;
+	register unsigned long d1 __asm__("d1") = a;
+	register unsigned long d2 __asm__("d2") = b;
+	register unsigned long d3 __asm__("d3") = c;
+	register unsigned long d4 __asm__("d4") = d;
+	register unsigned long d5 __asm__("d5") = e;
+	register unsigned long a0 __asm__("a0") = f;
+	__asm__ __volatile__ ("trap #0" : "+r"(d0)
+		: "r"(d1), "r"(d2), "r"(d3), "r"(d4), "r"(d5), "r"(a0)
+		: "memory");
+	return d0;
+}
+
+#define SYSCALL_USE_SOCKETCALL