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Current File : /lib/modules/5.15.0-1028-aws/build/arch/parisc/include/asm/unistd.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_PARISC_UNISTD_H_
#define _ASM_PARISC_UNISTD_H_

#include <uapi/asm/unistd.h>

#define __NR_Linux_syscalls	__NR_syscalls

#ifndef __ASSEMBLY__

#define SYS_ify(syscall_name)   __NR_##syscall_name

#define __IGNORE_fadvise64		/* fadvise64_64 */

#ifndef ASM_LINE_SEP
# define ASM_LINE_SEP ;
#endif

/* Definition taken from glibc 2.3.3
 * sysdeps/unix/sysv/linux/hppa/sysdep.h
 */

#ifdef PIC
/* WARNING: CANNOT BE USED IN A NOP! */
# define K_STW_ASM_PIC	"       copy %%r19, %%r4\n"
# define K_LDW_ASM_PIC	"       copy %%r4, %%r19\n"
# define K_USING_GR4	"%r4",
#else
# define K_STW_ASM_PIC	" \n"
# define K_LDW_ASM_PIC	" \n"
# define K_USING_GR4
#endif

/* GCC has to be warned that a syscall may clobber all the ABI
   registers listed as "caller-saves", see page 8, Table 2
   in section 2.2.6 of the PA-RISC RUN-TIME architecture
   document. However! r28 is the result and will conflict with
   the clobber list so it is left out. Also the input arguments
   registers r20 -> r26 will conflict with the list so they
   are treated specially. Although r19 is clobbered by the syscall
   we cannot say this because it would violate ABI, thus we say
   r4 is clobbered and use that register to save/restore r19
   across the syscall. */

#define K_CALL_CLOB_REGS "%r1", "%r2", K_USING_GR4 \
	        	 "%r20", "%r29", "%r31"

#undef K_INLINE_SYSCALL
#define K_INLINE_SYSCALL(name, nr, args...)	({			\
	long __sys_res;							\
	{								\
		register unsigned long __res __asm__("r28");		\
		K_LOAD_ARGS_##nr(args)					\
		/* FIXME: HACK stw/ldw r19 around syscall */		\
		__asm__ volatile(					\
			K_STW_ASM_PIC					\
			"	ble  0x100(%%sr2, %%r0)\n"		\
			"	ldi %1, %%r20\n"			\
			K_LDW_ASM_PIC					\
			: "=r" (__res)					\
			: "i" (SYS_ify(name)) K_ASM_ARGS_##nr   	\
			: "memory", K_CALL_CLOB_REGS K_CLOB_ARGS_##nr	\
		);							\
		__sys_res = (long)__res;				\
	}								\
	if ( (unsigned long)__sys_res >= (unsigned long)-4095 ){	\
		errno = -__sys_res;		        		\
		__sys_res = -1;						\
	}								\
	__sys_res;							\
})

#define K_LOAD_ARGS_0()
#define K_LOAD_ARGS_1(r26)					\
	register unsigned long __r26 __asm__("r26") = (unsigned long)(r26);   \
	K_LOAD_ARGS_0()
#define K_LOAD_ARGS_2(r26,r25)					\
	register unsigned long __r25 __asm__("r25") = (unsigned long)(r25);   \
	K_LOAD_ARGS_1(r26)
#define K_LOAD_ARGS_3(r26,r25,r24)				\
	register unsigned long __r24 __asm__("r24") = (unsigned long)(r24);   \
	K_LOAD_ARGS_2(r26,r25)
#define K_LOAD_ARGS_4(r26,r25,r24,r23)				\
	register unsigned long __r23 __asm__("r23") = (unsigned long)(r23);   \
	K_LOAD_ARGS_3(r26,r25,r24)
#define K_LOAD_ARGS_5(r26,r25,r24,r23,r22)			\
	register unsigned long __r22 __asm__("r22") = (unsigned long)(r22);   \
	K_LOAD_ARGS_4(r26,r25,r24,r23)
#define K_LOAD_ARGS_6(r26,r25,r24,r23,r22,r21)			\
	register unsigned long __r21 __asm__("r21") = (unsigned long)(r21);   \
	K_LOAD_ARGS_5(r26,r25,r24,r23,r22)

/* Even with zero args we use r20 for the syscall number */
#define K_ASM_ARGS_0
#define K_ASM_ARGS_1 K_ASM_ARGS_0, "r" (__r26)
#define K_ASM_ARGS_2 K_ASM_ARGS_1, "r" (__r25)
#define K_ASM_ARGS_3 K_ASM_ARGS_2, "r" (__r24)
#define K_ASM_ARGS_4 K_ASM_ARGS_3, "r" (__r23)
#define K_ASM_ARGS_5 K_ASM_ARGS_4, "r" (__r22)
#define K_ASM_ARGS_6 K_ASM_ARGS_5, "r" (__r21)

/* The registers not listed as inputs but clobbered */
#define K_CLOB_ARGS_6
#define K_CLOB_ARGS_5 K_CLOB_ARGS_6, "%r21"
#define K_CLOB_ARGS_4 K_CLOB_ARGS_5, "%r22"
#define K_CLOB_ARGS_3 K_CLOB_ARGS_4, "%r23"
#define K_CLOB_ARGS_2 K_CLOB_ARGS_3, "%r24"
#define K_CLOB_ARGS_1 K_CLOB_ARGS_2, "%r25"
#define K_CLOB_ARGS_0 K_CLOB_ARGS_1, "%r26"

#define _syscall0(type,name)						\
type name(void)								\
{									\
    return K_INLINE_SYSCALL(name, 0);	                                \
}

#define _syscall1(type,name,type1,arg1)					\
type name(type1 arg1)							\
{									\
    return K_INLINE_SYSCALL(name, 1, arg1);	                        \
}

#define _syscall2(type,name,type1,arg1,type2,arg2)			\
type name(type1 arg1, type2 arg2)					\
{									\
    return K_INLINE_SYSCALL(name, 2, arg1, arg2);	                \
}

#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3)		\
type name(type1 arg1, type2 arg2, type3 arg3)				\
{									\
    return K_INLINE_SYSCALL(name, 3, arg1, arg2, arg3);	                \
}

#define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4)		\
{									\
    return K_INLINE_SYSCALL(name, 4, arg1, arg2, arg3, arg4);	        \
}

/* select takes 5 arguments */
#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 K_INLINE_SYSCALL(name, 5, arg1, arg2, arg3, arg4, arg5);	\
}

#define __ARCH_WANT_NEW_STAT
#define __ARCH_WANT_OLD_READDIR
#define __ARCH_WANT_STAT64
#define __ARCH_WANT_SYS_ALARM
#define __ARCH_WANT_SYS_GETHOSTNAME
#define __ARCH_WANT_SYS_PAUSE
#define __ARCH_WANT_SYS_SIGNAL
#define __ARCH_WANT_SYS_TIME32
#define __ARCH_WANT_COMPAT_SYS_SCHED_RR_GET_INTERVAL
#define __ARCH_WANT_SYS_UTIME32
#define __ARCH_WANT_SYS_WAITPID
#define __ARCH_WANT_SYS_SOCKETCALL
#define __ARCH_WANT_SYS_FADVISE64
#define __ARCH_WANT_SYS_GETPGRP
#define __ARCH_WANT_SYS_NICE
#define __ARCH_WANT_SYS_OLDUMOUNT
#define __ARCH_WANT_SYS_SIGPENDING
#define __ARCH_WANT_SYS_SIGPROCMASK
#define __ARCH_WANT_SYS_FORK
#define __ARCH_WANT_SYS_VFORK
#define __ARCH_WANT_SYS_CLONE
#define __ARCH_WANT_SYS_CLONE3
#define __ARCH_WANT_COMPAT_SYS_SENDFILE

#ifdef CONFIG_64BIT
#define __ARCH_WANT_SYS_TIME
#define __ARCH_WANT_SYS_UTIME
#endif

#endif /* __ASSEMBLY__ */

#undef STR

#endif /* _ASM_PARISC_UNISTD_H_ */

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