refactor: restructure the user space stuff.

[lunaix-os.git] / lunaix-os / usr / libc / arch / i386 / syscall.h

diff --git a/lunaix-os/usr/libc/arch/i386/syscall.h b/lunaix-os/usr/libc/arch/i386/syscall.h
new file mode 100644 (file)
index 0000000..4747678
--- /dev/null
+++ b/lunaix-os/usr/libc/arch/i386/syscall.h
@@ -0,0 +1,69 @@
+#ifndef __LUNAIX_SYSCALL_H
+#define __LUNAIX_SYSCALL_H
+#include <lunaix/syscallid.h>
+
+#define asmlinkage __attribute__((regparm(0)))
+
+#define __PARAM_MAP1(t1, p1) t1 p1
+#define __PARAM_MAP2(t1, p1, ...) t1 p1, __PARAM_MAP1(__VA_ARGS__)
+#define __PARAM_MAP3(t1, p1, ...) t1 p1, __PARAM_MAP2(__VA_ARGS__)
+#define __PARAM_MAP4(t1, p1, ...) t1 p1, __PARAM_MAP3(__VA_ARGS__)
+#define __PARAM_MAP5(t1, p1, ...) t1 p1, __PARAM_MAP4(__VA_ARGS__)
+#define __PARAM_MAP6(t1, p1, ...) t1 p1, __PARAM_MAP5(__VA_ARGS__)
+
+#define ___DOINT33(callcode, rettype)                                          \
+    int v;                                                                     \
+    asm volatile("int %1\n" : "=a"(v) : "i"(33), "a"(callcode));               \
+    return (rettype)v;
+
+#define __LXSYSCALL(rettype, name)                                             \
+    rettype name()                                                             \
+    {                                                                          \
+        ___DOINT33(__SYSCALL_##name, rettype)                                  \
+    }
+
+#define __LXSYSCALL1(rettype, name, t1, p1)                                    \
+    rettype name(__PARAM_MAP1(t1, p1))                                         \
+    {                                                                          \
+        asm("" ::"b"(p1));                                                     \
+        ___DOINT33(__SYSCALL_##name, rettype)                                  \
+    }
+
+#define __LXSYSCALL2(rettype, name, t1, p1, t2, p2)                            \
+    rettype name(__PARAM_MAP2(t1, p1, t2, p2))                                 \
+    {                                                                          \
+        asm("\n" ::"b"(p1), "c"(p2));                                          \
+        ___DOINT33(__SYSCALL_##name, rettype)                                  \
+    }
+
+#define __LXSYSCALL3(rettype, name, t1, p1, t2, p2, t3, p3)                    \
+    rettype name(__PARAM_MAP3(t1, p1, t2, p2, t3, p3))                         \
+    {                                                                          \
+        asm("\n" ::"b"(p1), "c"(p2), "d"(p3));                                 \
+        ___DOINT33(__SYSCALL_##name, rettype)                                  \
+    }
+
+#define __LXSYSCALL4(rettype, name, t1, p1, t2, p2, t3, p3, t4, p4)            \
+    rettype name(__PARAM_MAP4(t1, p1, t2, p2, t3, p3, t4, p4))                 \
+    {                                                                          \
+        asm("\n" ::"b"(p1), "c"(p2), "d"(p3), "D"(p4));                        \
+        ___DOINT33(__SYSCALL_##name, rettype)                                  \
+    }
+
+#define __LXSYSCALL5(rettype, name, t1, p1, t2, p2, t3, p3, t4, p4, t5, p5)    \
+    rettype name(__PARAM_MAP5(t1, p1, t2, p2, t3, p3, t4, p4, t5, p5))         \
+    {                                                                          \
+        asm("" ::"r"(p5), "b"(p1), "c"(p2), "d"(p3), "D"(p4), "S"(p5));        \
+        ___DOINT33(__SYSCALL_##name, rettype)                                  \
+    }
+
+#define __LXSYSCALL2_VARG(rettype, name, t1, p1, t2, p2)                       \
+    __attribute__((noinline)) rettype name(__PARAM_MAP2(t1, p1, t2, p2), ...)  \
+    {                                                                          \
+        /* No inlining! This depends on the call frame assumption */           \
+        void* _last = (void*)&p2 + sizeof(void*);                              \
+        asm("\n" ::"b"(p1), "c"(p2), "d"(_last));                              \
+        ___DOINT33(__SYSCALL_##name, rettype)                                  \
+    }
+
+#endif /* __LUNAIX_SYSCALL_H */