use inline syscalls for powerpc (32-bit)

the inline syscall code is copied directly from powerpc64. the extent
of register clobber specifiers may be excessive on both; if that turns
out to be the case it can be fixed later.

Author: richfelker

arch/powerpc/syscall_arch.h

@@ -3,7 +3,89 @@
 ((union { long long ll; long l[2]; }){ .ll = x }).l[1]
 #define __SYSCALL_LL_O(x) 0, __SYSCALL_LL_E((x))
 
-#undef SYSCALL_NO_INLINE
-#define SYSCALL_NO_INLINE
+static inline long __syscall0(long n)
+{
+	register long r0 __asm__("r0") = n;
+	register long r3 __asm__("r3");
+	__asm__ __volatile__("sc ; bns+ 1f ; neg %1, %1 ; 1:"
+	: "+r"(r0), "=r"(r3)
+	:: "memory", "cr0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12");
+	return r3;
+}
+
+static inline long __syscall1(long n, long a)
+{
+	register long r0 __asm__("r0") = n;
+	register long r3 __asm__("r3") = a;
+	__asm__ __volatile__("sc ; bns+ 1f ; neg %1, %1 ; 1:"
+	: "+r"(r0), "+r"(r3)
+	:: "memory", "cr0", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12");
+	return r3;
+}
+
+static inline long __syscall2(long n, long a, long b)
+{
+	register long r0 __asm__("r0") = n;
+	register long r3 __asm__("r3") = a;
+	register long r4 __asm__("r4") = b;
+	__asm__ __volatile__("sc ; bns+ 1f ; neg %1, %1 ; 1:"
+	: "+r"(r0), "+r"(r3), "+r"(r4)
+	:: "memory", "cr0", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12");
+	return r3;
+}
+
+static inline long __syscall3(long n, long a, long b, long c)
+{
+	register long r0 __asm__("r0") = n;
+	register long r3 __asm__("r3") = a;
+	register long r4 __asm__("r4") = b;
+	register long r5 __asm__("r5") = c;
+	__asm__ __volatile__("sc ; bns+ 1f ; neg %1, %1 ; 1:"
+	: "+r"(r0), "+r"(r3), "+r"(r4), "+r"(r5)
+	:: "memory", "cr0", "r6", "r7", "r8", "r9", "r10", "r11", "r12");
+	return r3;
+}
+
+static inline long __syscall4(long n, long a, long b, long c, long d)
+{
+	register long r0 __asm__("r0") = n;
+	register long r3 __asm__("r3") = a;
+	register long r4 __asm__("r4") = b;
+	register long r5 __asm__("r5") = c;
+	register long r6 __asm__("r6") = d;
+	__asm__ __volatile__("sc ; bns+ 1f ; neg %1, %1 ; 1:"
+	: "+r"(r0), "+r"(r3), "+r"(r4), "+r"(r5), "+r"(r6)
+	:: "memory", "cr0", "r7", "r8", "r9", "r10", "r11", "r12");
+	return r3;
+}
+
+static inline long __syscall5(long n, long a, long b, long c, long d, long e)
+{
+	register long r0 __asm__("r0") = n;
+	register long r3 __asm__("r3") = a;
+	register long r4 __asm__("r4") = b;
+	register long r5 __asm__("r5") = c;
+	register long r6 __asm__("r6") = d;
+	register long r7 __asm__("r7") = e;
+	__asm__ __volatile__("sc ; bns+ 1f ; neg %1, %1 ; 1:"
+	: "+r"(r0), "+r"(r3), "+r"(r4), "+r"(r5), "+r"(r6), "+r"(r7)
+	:: "memory", "cr0", "r8", "r9", "r10", "r11", "r12");
+	return r3;
+}
+
+static inline long __syscall6(long n, long a, long b, long c, long d, long e, long f)
+{
+	register long r0 __asm__("r0") = n;
+	register long r3 __asm__("r3") = a;
+	register long r4 __asm__("r4") = b;
+	register long r5 __asm__("r5") = c;
+	register long r6 __asm__("r6") = d;
+	register long r7 __asm__("r7") = e;
+	register long r8 __asm__("r8") = f;
+	__asm__ __volatile__("sc ; bns+ 1f ; neg %1, %1 ; 1:"
+	: "+r"(r0), "+r"(r3), "+r"(r4), "+r"(r5), "+r"(r6), "+r"(r7), "+r"(r8)
+	:: "memory", "cr0", "r9", "r10", "r11", "r12");
+	return r3;
+}
 
 #define SYSCALL_FADVISE_6_ARG