/* Assembly macros for RISC-V.

   Copyright (C) 2011-2018

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library.  If not, see

   <http://www.gnu.org/licenses/>.  */

#ifndef _LINUX_RISCV_SYSDEP_H

#define _LINUX_RISCV_SYSDEP_H 1

#include <sysdeps/unix/sysv/linux/generic/sysdep.h>

#include <tls.h>

#ifdef __ASSEMBLER__

# include <sys/asm.h>

# define ENTRY(name) LEAF(name)

# define L(label) .L ## label

/* Performs a system call, handling errors by setting errno.  Linux indicates

   errors by setting a0 to a value between -1 and -4095.  */

# undef PSEUDO

# define PSEUDO(name, syscall_name, args)			\

  .text;							\

  .align 2;							\

  ENTRY (name);							\

  li a7, SYS_ify (syscall_name);				\

  scall;							\

  li a7, -4096;							\

  bgtu a0, a7, .Lsyscall_error ## name;

# undef PSEUDO_END

# define PSEUDO_END(sym) 					\

  SYSCALL_ERROR_HANDLER (sym)					\

  ret;								\

  END (sym)

# if !IS_IN (libc)

#  if RTLD_PRIVATE_ERRNO

#   define SYSCALL_ERROR_HANDLER(name)				\

.Lsyscall_error ## name:					\

	li t1, -4096;						\

	neg a0, a0;						\

        sw a0, rtld_errno, t1;					\

        li a0, -1;

#  elif defined (__PIC__)

#   define SYSCALL_ERROR_HANDLER(name)				\

.Lsyscall_error ## name:					\

        la.tls.ie t1, errno;					\

	add t1, t1, tp;						\

	neg a0, a0;						\

	sw a0, 0(t1);						\

        li a0, -1;

#  else

#   define SYSCALL_ERROR_HANDLER(name)				\

.Lsyscall_error ## name:					\

        lui t1, %tprel_hi(errno);				\

        add t1, t1, tp, %tprel_add(errno);			\

	neg a0, a0;						\

        sw a0, %tprel_lo(errno)(t1);				\

        li a0, -1;

#  endif

# else

#  define SYSCALL_ERROR_HANDLER(name)				\

.Lsyscall_error ## name:					\

        j       __syscall_error;

# endif

/* Performs a system call, not setting errno.  */

# undef PSEUDO_NEORRNO

# define PSEUDO_NOERRNO(name, syscall_name, args)	\

  .align 2;						\

  ENTRY (name);						\

  li a7, SYS_ify (syscall_name);			\

  scall;

# undef PSEUDO_END_NOERRNO

# define PSEUDO_END_NOERRNO(name)			\

  END (name)

# undef ret_NOERRNO

# define ret_NOERRNO ret

/* Perfroms a system call, returning the error code.  */

# undef PSEUDO_ERRVAL

# define PSEUDO_ERRVAL(name, syscall_name, args) 	\

  PSEUDO_NOERRNO (name, syscall_name, args)		\

  neg a0, a0;

# undef PSEUDO_END_ERRVAL

# define PSEUDO_END_ERRVAL(name)			\

  END (name)

# undef ret_ERRVAL

# define ret_ERRVAL ret

#endif /* __ASSEMBLER__ */

/* In order to get __set_errno() definition in INLINE_SYSCALL.  */

#ifndef __ASSEMBLER__

# include <errno.h>

#endif

#include <sysdeps/unix/sysdep.h>

#undef SYS_ify

#define SYS_ify(syscall_name)	__NR_##syscall_name

#ifndef __ASSEMBLER__

/* List of system calls which are supported as vsyscalls.  */

# define HAVE_CLOCK_GETRES_VSYSCALL	1

# define HAVE_CLOCK_GETTIME_VSYSCALL	1

# define HAVE_GETTIMEOFDAY_VSYSCALL	1

# define HAVE_GETCPU_VSYSCALL		1

/* Define a macro which expands into the inline wrapper code for a system

   call.  */

# undef INLINE_SYSCALL

# define INLINE_SYSCALL(name, nr, args...)				\

  ({ INTERNAL_SYSCALL_DECL (err);					\

     long int __sys_result = INTERNAL_SYSCALL (name, err, nr, args);	\

     if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (__sys_result, )))  \

       {								\

         __set_errno (INTERNAL_SYSCALL_ERRNO (__sys_result, ));		\

	 __sys_result = (unsigned long) -1;				\

       }								\

     __sys_result; })

# define INTERNAL_SYSCALL_DECL(err) do { } while (0)

# define INTERNAL_SYSCALL_ERROR_P(val, err) \

        ((unsigned long int) (val) > -4096UL)

# define INTERNAL_SYSCALL_ERRNO(val, err)     (-val)

# define INTERNAL_SYSCALL(name, err, nr, args...) \

	internal_syscall##nr (SYS_ify (name), err, args)

# define INTERNAL_SYSCALL_NCS(number, err, nr, args...) \

	internal_syscall##nr (number, err, args)

# define internal_syscall0(number, err, dummy...)			\

({ 									\

	long int _sys_result;						\

									\

	{								\

	register long int __a7 asm ("a7") = number;			\

	register long int __a0 asm ("a0");				\

	__asm__ volatile ( 						\

	"scall\n\t" 							\

	: "=r" (__a0)							\

	: "r" (__a7)							\

	: __SYSCALL_CLOBBERS); 						\

	_sys_result = __a0;						\

	}								\

	_sys_result;							\

})

# define internal_syscall1(number, err, arg0)				\

({ 									\

	long int _sys_result;						\

									\

	{								\

	register long int __a7 asm ("a7") = number;			\

	register long int __a0 asm ("a0") = (long int) (arg0);		\

	__asm__ volatile ( 						\

	"scall\n\t" 							\

	: "+r" (__a0)							\

	: "r" (__a7)							\

	: __SYSCALL_CLOBBERS); 						\

	_sys_result = __a0;						\

	}								\

	_sys_result;							\

})

# define internal_syscall2(number, err, arg0, arg1)	    		\

({ 									\

	long int _sys_result;						\

									\

	{								\

	register long int __a7 asm ("a7") = number;			\

	register long int __a0 asm ("a0") = (long int) (arg0);		\

	register long int __a1 asm ("a1") = (long int) (arg1);		\

	__asm__ volatile ( 						\

	"scall\n\t" 							\

	: "+r" (__a0)							\

	: "r" (__a7), "r" (__a1)					\

	: __SYSCALL_CLOBBERS); 						\

	_sys_result = __a0;						\

	}								\

	_sys_result;							\

})

# define internal_syscall3(number, err, arg0, arg1, arg2)      		\

({ 									\

	long int _sys_result;						\

									\

	{								\

	register long int __a7 asm ("a7") = number;			\

	register long int __a0 asm ("a0") = (long int) (arg0);		\

	register long int __a1 asm ("a1") = (long int) (arg1);		\

	register long int __a2 asm ("a2") = (long int) (arg2);		\

	__asm__ volatile ( 						\

	"scall\n\t" 							\

	: "+r" (__a0)							\

	: "r" (__a7), "r" (__a1), "r" (__a2)				\

	: __SYSCALL_CLOBBERS); 						\

	_sys_result = __a0;						\

	}								\

	_sys_result;							\

})

# define internal_syscall4(number, err, arg0, arg1, arg2, arg3)	  \

({ 									\

	long int _sys_result;						\

									\

	{								\

	register long int __a7 asm ("a7") = number;			\

	register long int __a0 asm ("a0") = (long int) (arg0);		\

	register long int __a1 asm ("a1") = (long int) (arg1);		\

	register long int __a2 asm ("a2") = (long int) (arg2);		\

	register long int __a3 asm ("a3") = (long int) (arg3);		\

	__asm__ volatile ( 						\

	"scall\n\t" 							\

	: "+r" (__a0)							\

	: "r" (__a7), "r" (__a1), "r" (__a2), "r" (__a3)		\

	: __SYSCALL_CLOBBERS); 						\

	_sys_result = __a0;						\

	}								\

	_sys_result;							\

})

# define internal_syscall5(number, err, arg0, arg1, arg2, arg3, arg4)   \

({ 									\

	long int _sys_result;						\

									\

	{								\

	register long int __a7 asm ("a7") = number;			\

	register long int __a0 asm ("a0") = (long int) (arg0);		\

	register long int __a1 asm ("a1") = (long int) (arg1);		\

	register long int __a2 asm ("a2") = (long int) (arg2);		\

	register long int __a3 asm ("a3") = (long int) (arg3);		\

	register long int __a4 asm ("a4") = (long int) (arg4);		\

	__asm__ volatile ( 						\

	"scall\n\t" 							\

	: "+r" (__a0)							\

	: "r" (__a7), "r"(__a1), "r"(__a2), "r"(__a3), "r" (__a4)	\

	: __SYSCALL_CLOBBERS); 						\

	_sys_result = __a0;						\

	}								\

	_sys_result;							\

})

# define internal_syscall6(number, err, arg0, arg1, arg2, arg3, arg4, arg5) \

({ 									\

	long int _sys_result;						\

									\

	{								\

	register long int __a7 asm ("a7") = number;			\

	register long int __a0 asm ("a0") = (long int) (arg0);		\

	register long int __a1 asm ("a1") = (long int) (arg1);		\

	register long int __a2 asm ("a2") = (long int) (arg2);		\

	register long int __a3 asm ("a3") = (long int) (arg3);		\

	register long int __a4 asm ("a4") = (long int) (arg4);		\

	register long int __a5 asm ("a5") = (long int) (arg5);		\

	__asm__ volatile ( 						\

	"scall\n\t" 							\

	: "+r" (__a0)							\

	: "r" (__a7), "r" (__a1), "r" (__a2), "r" (__a3),		\

	  "r" (__a4), "r" (__a5)					\

	: __SYSCALL_CLOBBERS); 						\

	_sys_result = __a0;						\

	}								\

	_sys_result;							\

})

# define internal_syscall7(number, err, arg0, arg1, arg2, arg3, arg4, arg5, arg6) \

({ 									\

	long int _sys_result;						\

									\

	{								\

	register long int __a7 asm ("a7") = number;			\

	register long int __a0 asm ("a0") = (long int) (arg0);		\

	register long int __a1 asm ("a1") = (long int) (arg1);		\

	register long int __a2 asm ("a2") = (long int) (arg2);		\

	register long int __a3 asm ("a3") = (long int) (arg3);		\

	register long int __a4 asm ("a4") = (long int) (arg4);		\

	register long int __a5 asm ("a5") = (long int) (arg5);		\

	register long int __a6 asm ("a6") = (long int) (arg6);		\

	__asm__ volatile ( 						\

	"scall\n\t" 							\

	: "+r" (__a0)							\

	: "r" (__a7), "r" (__a1), "r" (__a2), "r" (__a3),		\

	  "r" (__a4), "r" (__a5), "r" (__a6)				\

	: __SYSCALL_CLOBBERS); 						\

	_sys_result = __a0;						\

	}								\

	_sys_result;							\

})

# define __SYSCALL_CLOBBERS "memory"

extern long int __syscall_error (long int neg_errno);

#endif /* ! __ASSEMBLER__ */

/* Pointer mangling is not supported.  */

#define PTR_MANGLE(var) (void) (var)

#define PTR_DEMANGLE(var) (void) (var)

#endif /* linux/riscv/sysdep.h */