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@@ -4,16 +4,178 @@
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# error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead."
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#endif
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-#include <features.h>
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-
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-/* Do something very evil for now. Until we create our own syscall
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- * macros, short circuit bits/sysnum.h and use asm/unistd.h instead */
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-#include <asm/unistd.h>
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-
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/* This includes the `__NR_<name>' syscall numbers taken from the Linux kernel
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* header files. It also defines the traditional `SYS_<name>' macros for older
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* programs. */
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#include <bits/sysnum.h>
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-#endif /* _BITS_SYSCALLS_H */
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+#ifndef __set_errno
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+# define __set_errno(val) (*__errno_location ()) = (val)
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+#endif
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+
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+/*
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+ Some of the sneaky macros in the code were taken from
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+ glibc-2.2.5/sysdeps/unix/sysv/linux/m68k/sysdep.h
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+*/
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+
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+#ifndef __ASSEMBLER__
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+
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+#undef _syscall0
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+#define _syscall0(type,name) \
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+type name(void) \
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+{ \
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+return (type) (INLINE_SYSCALL(name, 0)); \
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+}
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+
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+#undef _syscall1
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+#define _syscall1(type,name,type1,arg1) \
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+type name(type1 arg1) \
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+{ \
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+return (type) (INLINE_SYSCALL(name, 1, arg1)); \
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+}
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+
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+#undef _syscall2
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+#define _syscall2(type,name,type1,arg1,type2,arg2) \
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+type name(type1 arg1,type2 arg2) \
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+{ \
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+return (type) (INLINE_SYSCALL(name, 2, arg1, arg2)); \
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+}
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+
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+#undef _syscall3
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+#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \
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+type name(type1 arg1,type2 arg2,type3 arg3) \
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+{ \
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+return (type) (INLINE_SYSCALL(name, 3, arg1, arg2, arg3)); \
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+}
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+
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+#undef _syscall4
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+#define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
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+type name (type1 arg1, type2 arg2, type3 arg3, type4 arg4) \
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+{ \
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+return (type) (INLINE_SYSCALL(name, 4, arg1, arg2, arg3, arg4)); \
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+}
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+
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+#undef _syscall5
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+#define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
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+ type5,arg5) \
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+type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5) \
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+{ \
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+return (type) (INLINE_SYSCALL(name, 5, arg1, arg2, arg3, arg4, arg5)); \
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+}
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+
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+#undef _syscall6
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+#define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
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+ type5,arg5,type6,arg6) \
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+type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5,type6 arg6) \
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+{ \
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+return (type) (INLINE_SYSCALL(name, 6, arg1, arg2, arg3, arg4, arg5, arg6)); \
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+}
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+/* Linux takes system call arguments in registers:
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+
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+ syscall number %d0 call-clobbered
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+ arg 1 %d1 call-clobbered
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+ arg 2 %d2 call-saved
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+ arg 3 %d3 call-saved
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+ arg 4 %d4 call-saved
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+ arg 5 %d5 call-saved
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+
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+ The stack layout upon entering the function is:
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+
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+ 20(%sp) Arg# 5
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+ 16(%sp) Arg# 4
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+ 12(%sp) Arg# 3
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+ 8(%sp) Arg# 2
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+ 4(%sp) Arg# 1
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+ (%sp) Return address
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+
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+ (Of course a function with say 3 arguments does not have entries for
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+ arguments 4 and 5.)
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+
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+ Separate move's are faster than movem, but need more space. Since
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+ speed is more important, we don't use movem. Since %a0 and %a1 are
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+ scratch registers, we can use them for saving as well. */
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+
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+#undef INLINE_SYSCALL
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+#define INLINE_SYSCALL(name, nr, args...) \
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+ ({ unsigned int _sys_result = INTERNAL_SYSCALL (name, , nr, args); \
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+ if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (_sys_result, ), 0))\
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+ { \
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+ __set_errno (INTERNAL_SYSCALL_ERRNO (_sys_result, )); \
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+ _sys_result = (unsigned int) -1; \
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+ } \
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+ (int) _sys_result; })
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+
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+#undef INTERNAL_SYSCALL
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+#define INTERNAL_SYSCALL(name, err, nr, args...) \
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+ ({ unsigned int _sys_result; \
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+ { \
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+ /* Load argument values in temporary variables
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+ to perform side effects like function calls
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+ before the call used registers are set. */ \
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+ LOAD_ARGS_##nr (args) \
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+ LOAD_REGS_##nr \
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+ register int _d0 asm ("%d0") = __NR_##name; \
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+ asm volatile ("trap #0" \
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+ : "=d" (_d0) \
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+ : "0" (_d0) ASM_ARGS_##nr \
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+ : "memory"); \
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+ _sys_result = _d0; \
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+ } \
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+ (int) _sys_result; })
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+
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+#undef INTERNAL_SYSCALL_ERROR_P
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+#define INTERNAL_SYSCALL_ERROR_P(val, err) \
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+ ((unsigned int) (val) >= -4095U)
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+
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+#undef INTERNAL_SYSCALL_ERRNO
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+#define INTERNAL_SYSCALL_ERRNO(val, err) (-(val))
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+
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+#define LOAD_ARGS_0()
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+#define LOAD_REGS_0
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+#define ASM_ARGS_0
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+#define LOAD_ARGS_1(a1) \
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+ LOAD_ARGS_0 () \
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+ int __arg1 = (int) (a1);
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+#define LOAD_REGS_1 \
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+ register int _d1 asm ("d1") = __arg1; \
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+ LOAD_REGS_0
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+#define ASM_ARGS_1 ASM_ARGS_0, "d" (_d1)
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+#define LOAD_ARGS_2(a1, a2) \
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+ LOAD_ARGS_1 (a1) \
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+ int __arg2 = (int) (a2);
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+#define LOAD_REGS_2 \
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+ register int _d2 asm ("d2") = __arg2; \
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+ LOAD_REGS_1
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+#define ASM_ARGS_2 ASM_ARGS_1, "d" (_d2)
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+#define LOAD_ARGS_3(a1, a2, a3) \
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+ LOAD_ARGS_2 (a1, a2) \
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+ int __arg3 = (int) (a3);
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+#define LOAD_REGS_3 \
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+ register int _d3 asm ("d3") = __arg3; \
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+ LOAD_REGS_2
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+#define ASM_ARGS_3 ASM_ARGS_2, "d" (_d3)
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+#define LOAD_ARGS_4(a1, a2, a3, a4) \
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+ LOAD_ARGS_3 (a1, a2, a3) \
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+ int __arg4 = (int) (a4);
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+#define LOAD_REGS_4 \
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+ register int _d4 asm ("d4") = __arg4; \
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+ LOAD_REGS_3
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+#define ASM_ARGS_4 ASM_ARGS_3, "d" (_d4)
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+#define LOAD_ARGS_5(a1, a2, a3, a4, a5) \
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+ LOAD_ARGS_4 (a1, a2, a3, a4) \
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+ int __arg5 = (int) (a5);
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+#define LOAD_REGS_5 \
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+ register int _d5 asm ("d5") = __arg5; \
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+ LOAD_REGS_4
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+#define ASM_ARGS_5 ASM_ARGS_4, "d" (_d5)
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+#define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6) \
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+ LOAD_ARGS_5 (a1, a2, a3, a4, a5) \
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+ int __arg6 = (int) (a6);
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+#define LOAD_REGS_6 \
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+ register int _a0 asm ("a0") = __arg6; \
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+ LOAD_REGS_5
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+#define ASM_ARGS_6 ASM_ARGS_5, "a" (_a0)
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+
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+#endif /* __ASSEMBLER__ */
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+#endif /* _BITS_SYSCALLS_H */
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