[uClibc-cvs] svn commit: trunk/uClibc/libc/sysdeps/linux/m68k/bits
vapier at uclibc.org
vapier at uclibc.org
Wed Mar 16 01:43:18 UTC 2005
Author: vapier
Date: 2005-03-15 18:43:17 -0700 (Tue, 15 Mar 2005)
New Revision: 10017
Log:
get rid of linux-headers hack ... rip code from glibc
Modified:
trunk/uClibc/libc/sysdeps/linux/m68k/bits/syscalls.h
Changeset:
Modified: trunk/uClibc/libc/sysdeps/linux/m68k/bits/syscalls.h
===================================================================
--- trunk/uClibc/libc/sysdeps/linux/m68k/bits/syscalls.h 2005-03-16 01:19:54 UTC (rev 10016)
+++ trunk/uClibc/libc/sysdeps/linux/m68k/bits/syscalls.h 2005-03-16 01:43:17 UTC (rev 10017)
@@ -4,16 +4,178 @@
# error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead."
#endif
-#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>
+#ifndef __set_errno
+# define __set_errno(val) (*__errno_location ()) = (val)
+#endif
+
+/*
+ Some of the sneaky macros in the code were taken from
+ glibc-2.2.5/sysdeps/unix/sysv/linux/m68k/sysdep.h
+*/
+
+#ifndef __ASSEMBLER__
+
+#undef _syscall0
+#define _syscall0(type,name) \
+type name(void) \
+{ \
+return (type) (INLINE_SYSCALL(name, 0)); \
+}
+
+#undef _syscall1
+#define _syscall1(type,name,type1,arg1) \
+type name(type1 arg1) \
+{ \
+return (type) (INLINE_SYSCALL(name, 1, arg1)); \
+}
+
+#undef _syscall2
+#define _syscall2(type,name,type1,arg1,type2,arg2) \
+type name(type1 arg1,type2 arg2) \
+{ \
+return (type) (INLINE_SYSCALL(name, 2, arg1, arg2)); \
+}
+
+#undef _syscall3
+#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \
+type name(type1 arg1,type2 arg2,type3 arg3) \
+{ \
+return (type) (INLINE_SYSCALL(name, 3, arg1, arg2, arg3)); \
+}
+
+#undef _syscall4
+#define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
+type name (type1 arg1, type2 arg2, type3 arg3, type4 arg4) \
+{ \
+return (type) (INLINE_SYSCALL(name, 4, arg1, arg2, arg3, arg4)); \
+}
+
+#undef _syscall5
+#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) \
+{ \
+return (type) (INLINE_SYSCALL(name, 5, arg1, arg2, arg3, arg4, arg5)); \
+}
+
+#undef _syscall6
+#define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
+ type5,arg5,type6,arg6) \
+type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5,type6 arg6) \
+{ \
+return (type) (INLINE_SYSCALL(name, 6, arg1, arg2, arg3, arg4, arg5, arg6)); \
+}
+
+/* Linux takes system call arguments in registers:
+
+ syscall number %d0 call-clobbered
+ arg 1 %d1 call-clobbered
+ arg 2 %d2 call-saved
+ arg 3 %d3 call-saved
+ arg 4 %d4 call-saved
+ arg 5 %d5 call-saved
+
+ The stack layout upon entering the function is:
+
+ 20(%sp) Arg# 5
+ 16(%sp) Arg# 4
+ 12(%sp) Arg# 3
+ 8(%sp) Arg# 2
+ 4(%sp) Arg# 1
+ (%sp) Return address
+
+ (Of course a function with say 3 arguments does not have entries for
+ arguments 4 and 5.)
+
+ Separate move's are faster than movem, but need more space. Since
+ speed is more important, we don't use movem. Since %a0 and %a1 are
+ scratch registers, we can use them for saving as well. */
+
+#undef INLINE_SYSCALL
+#define INLINE_SYSCALL(name, nr, args...) \
+ ({ unsigned int _sys_result = INTERNAL_SYSCALL (name, , nr, args); \
+ if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (_sys_result, ), 0))\
+ { \
+ __set_errno (INTERNAL_SYSCALL_ERRNO (_sys_result, )); \
+ _sys_result = (unsigned int) -1; \
+ } \
+ (int) _sys_result; })
+
+#undef INTERNAL_SYSCALL
+#define INTERNAL_SYSCALL(name, err, nr, args...) \
+ ({ unsigned int _sys_result; \
+ { \
+ /* Load argument values in temporary variables
+ to perform side effects like function calls
+ before the call used registers are set. */ \
+ LOAD_ARGS_##nr (args) \
+ LOAD_REGS_##nr \
+ register int _d0 asm ("%d0") = __NR_##name; \
+ asm volatile ("trap #0" \
+ : "=d" (_d0) \
+ : "0" (_d0) ASM_ARGS_##nr \
+ : "memory"); \
+ _sys_result = _d0; \
+ } \
+ (int) _sys_result; })
+
+#undef INTERNAL_SYSCALL_ERROR_P
+#define INTERNAL_SYSCALL_ERROR_P(val, err) \
+ ((unsigned int) (val) >= -4095U)
+
+#undef INTERNAL_SYSCALL_ERRNO
+#define INTERNAL_SYSCALL_ERRNO(val, err) (-(val))
+
+#define LOAD_ARGS_0()
+#define LOAD_REGS_0
+#define ASM_ARGS_0
+#define LOAD_ARGS_1(a1) \
+ LOAD_ARGS_0 () \
+ int __arg1 = (int) (a1);
+#define LOAD_REGS_1 \
+ register int _d1 asm ("d1") = __arg1; \
+ LOAD_REGS_0
+#define ASM_ARGS_1 ASM_ARGS_0, "d" (_d1)
+#define LOAD_ARGS_2(a1, a2) \
+ LOAD_ARGS_1 (a1) \
+ int __arg2 = (int) (a2);
+#define LOAD_REGS_2 \
+ register int _d2 asm ("d2") = __arg2; \
+ LOAD_REGS_1
+#define ASM_ARGS_2 ASM_ARGS_1, "d" (_d2)
+#define LOAD_ARGS_3(a1, a2, a3) \
+ LOAD_ARGS_2 (a1, a2) \
+ int __arg3 = (int) (a3);
+#define LOAD_REGS_3 \
+ register int _d3 asm ("d3") = __arg3; \
+ LOAD_REGS_2
+#define ASM_ARGS_3 ASM_ARGS_2, "d" (_d3)
+#define LOAD_ARGS_4(a1, a2, a3, a4) \
+ LOAD_ARGS_3 (a1, a2, a3) \
+ int __arg4 = (int) (a4);
+#define LOAD_REGS_4 \
+ register int _d4 asm ("d4") = __arg4; \
+ LOAD_REGS_3
+#define ASM_ARGS_4 ASM_ARGS_3, "d" (_d4)
+#define LOAD_ARGS_5(a1, a2, a3, a4, a5) \
+ LOAD_ARGS_4 (a1, a2, a3, a4) \
+ int __arg5 = (int) (a5);
+#define LOAD_REGS_5 \
+ register int _d5 asm ("d5") = __arg5; \
+ LOAD_REGS_4
+#define ASM_ARGS_5 ASM_ARGS_4, "d" (_d5)
+#define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6) \
+ LOAD_ARGS_5 (a1, a2, a3, a4, a5) \
+ int __arg6 = (int) (a6);
+#define LOAD_REGS_6 \
+ register int _a0 asm ("a0") = __arg6; \
+ LOAD_REGS_5
+#define ASM_ARGS_6 ASM_ARGS_5, "a" (_a0)
+
+#endif /* __ASSEMBLER__ */
#endif /* _BITS_SYSCALLS_H */
-
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