syscall organization overhaul

now public syscall.h only exposes __NR_* and SYS_* constants and the
variadic syscall function. no macros or inline functions, no
__syscall_ret or other internal details, no 16-/32-bit legacy syscall
renaming, etc. this logic has all been moved to src/internal/syscall.h
with the arch-specific parts in arch/$(ARCH)/syscall_arch.h, and the
amount of arch-specific stuff has been reduced to a minimum.

changes still need to be reviewed/double-checked. minimal testing on
i386 and mips has already been performed.

1 files changed, 64 insertions, 0 deletions

diff --git a/arch/x86_64/syscall_arch.h b/arch/x86_64/syscall_arch.h
new file mode 100644
index 00000000..1c4b48a2
--- /dev/null
+++ b/arch/x86_64/syscall_arch.h
@@ -0,0 +1,64 @@
+#define __SYSCALL_LL_E(x) (x)
+#define __SYSCALL_LL_O(x) (x)
+
+#define __SYSCALL_SSLEN 8
+
+static __inline long __syscall0(long n)
+{
+	unsigned long ret;
+	__asm__ __volatile__ ("syscall" : "=a"(ret) : "a"(n) : "rcx", "r11", "memory");
+	return ret;
+}
+
+static __inline long __syscall1(long n, long a1)
+{
+	unsigned long ret;
+	__asm__ __volatile__ ("syscall" : "=a"(ret) : "a"(n), "D"(a1) : "rcx", "r11", "memory");
+	return ret;
+}
+
+static __inline long __syscall2(long n, long a1, long a2)
+{
+	unsigned long ret;
+	__asm__ __volatile__ ("syscall" : "=a"(ret) : "a"(n), "D"(a1), "S"(a2)
+						  : "rcx", "r11", "memory");
+	return ret;
+}
+
+static __inline long __syscall3(long n, long a1, long a2, long a3)
+{
+	unsigned long ret;
+	__asm__ __volatile__ ("syscall" : "=a"(ret) : "a"(n), "D"(a1), "S"(a2),
+						  "d"(a3) : "rcx", "r11", "memory");
+	return ret;
+}
+
+static __inline long __syscall4(long n, long a1, long a2, long a3, long a4)
+{
+	unsigned long ret;
+	register long r10 __asm__("r10") = a4;
+	__asm__ __volatile__ ("syscall" : "=a"(ret) : "a"(n), "D"(a1), "S"(a2),
+						  "d"(a3), "r"(r10): "rcx", "r11", "memory");
+	return ret;
+}
+
+static __inline long __syscall5(long n, long a1, long a2, long a3, long a4, long a5)
+{
+	unsigned long ret;
+	register long r10 __asm__("r10") = a4;
+	register long r8 __asm__("r8") = a5;
+	__asm__ __volatile__ ("syscall" : "=a"(ret) : "a"(n), "D"(a1), "S"(a2),
+						  "d"(a3), "r"(r10), "r"(r8) : "rcx", "r11", "memory");
+	return ret;
+}
+
+static __inline long __syscall6(long n, long a1, long a2, long a3, long a4, long a5, long a6)
+{
+	unsigned long ret;
+	register long r10 __asm__("r10") = a4;
+	register long r8 __asm__("r8") = a5;
+	register long r9 __asm__("r9") = a6;
+	__asm__ __volatile__ ("syscall" : "=a"(ret) : "a"(n), "D"(a1), "S"(a2),
+						  "d"(a3), "r"(r10), "r"(r8), "r"(r9) : "rcx", "r11", "memory");
+	return ret;
+}