Blackfin: declare {INLINE,INTERNAL}_SYSCALL() and friends

diff --git a/libc/sysdeps/linux/bfin/bits/syscalls.h b/libc/sysdeps/linux/bfin/bits/syscalls.h
index 0833a1f..37e564d 100644 (file)
--- a/libc/sysdeps/linux/bfin/bits/syscalls.h
+++ b/libc/sysdeps/linux/bfin/bits/syscalls.h
@@ -134,5 +134,58 @@ type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5, type6 arg6
        __syscall_return(type,__res);                                   \
 }
 
+
+/* Define a macro which expands into the inline wrapper code for a system call */
+#define INLINE_SYSCALL(name, nr, args...)                              \
+({                                                                     \
+       INTERNAL_SYSCALL_DECL(err);                                     \
+       long result_var = INTERNAL_SYSCALL(name, err, nr, args);        \
+       if (INTERNAL_SYSCALL_ERROR_P(result_var, err)) {                \
+               __set_errno(INTERNAL_SYSCALL_ERRNO(result_var, err));   \
+               result_var = -1L;                                       \
+       }                                                               \
+       result_var;                                                     \
+})
+
+#define INTERNAL_SYSCALL_DECL(err)         do { } while (0)
+#define INTERNAL_SYSCALL_ERROR_P(val, err) ((unsigned long)val >= (unsigned long)(-4095))
+#define INTERNAL_SYSCALL_ERRNO(val, err)   (-(val))
+
+#define INTERNAL_SYSCALL(name, err, nr, args...)       \
+({                                                     \
+       long __res;                                     \
+       __asm__ __volatile__ (                          \
+               "excpt 0;\n\t"                          \
+               : "=q0" (__res)                         \
+               : "qA"  (__NR_##name) ASMFMT_##nr(args) \
+               : "memory","CC");                       \
+       __res;                                          \
+})
+
+#define ASMFMT_0()
+
+#define ASMFMT_1(arg1) \
+       , "q0" ((long)(arg1))
+
+#define ASMFMT_2(arg1, arg2) \
+       ASMFMT_1(arg1) \
+       , "q1" ((long)(arg2))
+
+#define ASMFMT_3(arg1, arg2, arg3) \
+       ASMFMT_2(arg1, arg2) \
+       , "q2" ((long)(arg3))
+
+#define ASMFMT_4(arg1, arg2, arg3, arg4) \
+       ASMFMT_3(arg1, arg2, arg3) \
+       , "q3" ((long)(arg4))
+
+#define ASMFMT_5(arg1, arg2, arg3, arg4, arg5) \
+       ASMFMT_4(arg1, arg2, arg3, arg4) \
+       , "q4" ((long)(arg5))
+
+#define ASMFMT_6(arg1, arg2, arg3, arg4, arg5, arg6) \
+       ASMFMT_5(arg1, arg2, arg3, arg4, arg5) \
+       , "q5" ((long)(arg6))
+
 #endif /* __ASSEMBLER__ */
 #endif /* _BITS_SYSCALLS_H */