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-rw-r--r--libc/sysdeps/linux/bfin/bits/syscalls.h134
1 files changed, 129 insertions, 5 deletions
diff --git a/libc/sysdeps/linux/bfin/bits/syscalls.h b/libc/sysdeps/linux/bfin/bits/syscalls.h
index 62541b873..82692fc65 100644
--- a/libc/sysdeps/linux/bfin/bits/syscalls.h
+++ b/libc/sysdeps/linux/bfin/bits/syscalls.h
@@ -6,14 +6,138 @@
#include <features.h>
-/* Do something very evil for now. Until we create our own syscall
- * macros, short circuit bits/sysnum.h and use asm/unistd.h instead */
-#include <asm/unistd.h>
-
/* This includes the `__NR_<name>' syscall numbers taken from the Linux kernel
* header files. It also defines the traditional `SYS_<name>' macros for older
* programs. */
#include <bits/sysnum.h>
-#endif /* _BITS_SYSCALLS_H */
+/* This code is mostly cut & paste from the uClinux bfin port */
+
+#ifndef __ASSEMBLER__
+
+#define __syscall_return(type, res) \
+do { \
+ if ((unsigned long)(res) >= (unsigned long)(-125)) \
+ { __set_errno(-(res)); \
+ res = -1; \
+ } \
+ return (type) (res); \
+} while (0)
+
+#define _syscall0(type,name) \
+type name(void) { \
+ long __res; \
+ __asm__ __volatile__ ( \
+ "p0 = %1;\n\t" \
+ "excpt 0;\n\t" \
+ "%0=r0;\n\t" \
+ : "=da" (__res) \
+ : "i" (__NR_##name) \
+ : "CC", "P0"); \
+__syscall_return(type,__res); \
+}
+
+#define _syscall1(type,name,type1,arg1) \
+type name(type1 arg1) { \
+ long __res; \
+ __asm__ __volatile__ ( \
+ "r0=%2;\n\t" \
+ "p0=%1;\n\t" \
+ "excpt 0;\n\t" \
+ "%0=r0;\n\t" \
+ : "=da" (__res) \
+ : "i" (__NR_##name), \
+ "a" ((long)(arg1)) \
+ : "CC", "R0", "P0"); \
+__syscall_return(type,__res); \
+}
+#define _syscall2(type,name,type1,arg1,type2,arg2) \
+type name(type1 arg1,type2 arg2) { \
+ long __res; \
+ __asm__ __volatile__ ( \
+ "r1=%3;\n\t" \
+ "r0=%2;\n\t" \
+ "p0=%1;\n\t" \
+ "excpt 0;\n\t" \
+ "%0=r0;\n\t" \
+ : "=da" (__res) \
+ : "i" (__NR_##name), \
+ "a" ((long)(arg1)), \
+ "a" ((long)(arg2)) \
+ : "CC", "R0","R1", "P0"); \
+__syscall_return(type,__res); \
+}
+
+
+#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \
+type name(type1 arg1,type2 arg2,type3 arg3) { \
+ long __res; \
+ __asm__ __volatile__ ( \
+ "r2=%4;\n\t" \
+ "r1=%3;\n\t" \
+ "r0=%2;\n\t" \
+ "p0=%1;\n\t" \
+ "excpt 0;\n\t" \
+ "%0=r0;\n\t" \
+ : "=da" (__res) \
+ : "i" (__NR_##name), \
+ "a" ((long)(arg1)), \
+ "a" ((long)(arg2)), \
+ "a" ((long)(arg3)) \
+ : "CC", "R0","R1","R2", "P0"); \
+__syscall_return(type,__res); \
+}
+
+#define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4)\
+type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4) { \
+ long __res; \
+ __asm__ __volatile__ ( \
+ "[--sp] = r3;\n\t" \
+ "r3=%5;\n\t" \
+ "r2=%4;\n\t" \
+ "r1=%3;\n\t" \
+ "r0=%2;\n\t" \
+ "p0=%1;\n\t" \
+ "excpt 0;\n\t" \
+ "%0=r0;\n\t" \
+ "r3 = [sp++];\n\t" \
+ : "=da" (__res) \
+ : "i" (__NR_##name), \
+ "a" ((long)(arg1)), \
+ "a" ((long)(arg2)), \
+ "a" ((long)(arg3)), \
+ "a" ((long)(arg4)) \
+ : "CC", "R0","R1","R2","R3", "P0"); \
+__syscall_return(type,__res); \
+}
+
+#define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5) \
+type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5) { \
+ long __res; \
+ __asm__ __volatile__ ( \
+ "[--sp] = r4;\n\t" \
+ "[--sp] = r3;\n\t" \
+ "r4=%6;\n\t" \
+ "r3=%5;\n\t" \
+ "r2=%4;\n\t" \
+ "r1=%3;\n\t" \
+ "r0=%2;\n\t" \
+ "P0=%1;\n\t" \
+ "excpt 0;\n\t" \
+ "%0=r0;\n\t" \
+ "r3 = [sp++];\n\t" \
+ "r4 = [sp++];\n\t" \
+ : "=da" (__res) \
+ : "i" (__NR_##name), \
+ "rm" ((long)(arg1)), \
+ "rm" ((long)(arg2)), \
+ "rm" ((long)(arg3)), \
+ "rm" ((long)(arg4)), \
+ "rm" ((long)(arg5)) \
+ : "CC","R0","R1","R2","R3","R4","P0"); \
+__syscall_return(type,__res); \
+}
+
+#endif /* __ASSEMBLER__ */
+#endif /* _BITS_SYSCALLS_H */