unistd.h

  1/* SPDX-License-Identifier: GPL-2.0 */
  2#ifndef _ASM_PARISC_UNISTD_H_
  3#define _ASM_PARISC_UNISTD_H_
  4
  5#include <uapi/asm/unistd.h>
  6
  7#define __NR_Linux_syscalls	__NR_syscalls
  8
  9#ifndef __ASSEMBLER__
 10
 11#define SYS_ify(syscall_name)   __NR_##syscall_name
 12
 13#define __IGNORE_fadvise64		/* fadvise64_64 */
 14
 15#ifndef ASM_LINE_SEP
 16# define ASM_LINE_SEP ;
 17#endif
 18
 19/* Definition taken from glibc 2.3.3
 20 * sysdeps/unix/sysv/linux/hppa/sysdep.h
 21 */
 22
 23#ifndef DONT_USE_PIC
 24/* WARNING: CANNOT BE USED IN A NOP! */
 25# define K_STW_ASM_PIC	"       copy %%r19, %%r4\n"
 26# define K_LDW_ASM_PIC	"       copy %%r4, %%r19\n"
 27# define K_USING_GR4	"%r4",
 28#else
 29# define K_STW_ASM_PIC	" \n"
 30# define K_LDW_ASM_PIC	" \n"
 31# define K_USING_GR4
 32#endif
 33
 34/* GCC has to be warned that a syscall may clobber all the ABI
 35   registers listed as "caller-saves", see page 8, Table 2
 36   in section 2.2.6 of the PA-RISC RUN-TIME architecture
 37   document. However! r28 is the result and will conflict with
 38   the clobber list so it is left out. Also the input arguments
 39   registers r20 -> r26 will conflict with the list so they
 40   are treated specially. Although r19 is clobbered by the syscall
 41   we cannot say this because it would violate ABI, thus we say
 42   r4 is clobbered and use that register to save/restore r19
 43   across the syscall. */
 44
 45#define K_CALL_CLOB_REGS "%r1", "%r2", K_USING_GR4 \
 46			 "%r20", "%r29", "%r31"
 47
 48#undef K_INLINE_SYSCALL
 49#define K_INLINE_SYSCALL(name, nr, args...)	({			\
 50	long __sys_res;							\
 51	{								\
 52		register unsigned long __res __asm__("r28");		\
 53		K_LOAD_ARGS_##nr(args)					\
 54		/* FIXME: HACK stw/ldw r19 around syscall */		\
 55		__asm__ volatile(					\
 56			K_STW_ASM_PIC					\
 57			"	ble  0x100(%%sr2, %%r0)\n"		\
 58			"	ldi %1, %%r20\n"			\
 59			K_LDW_ASM_PIC					\
 60			: "=r" (__res)					\
 61			: "i" (name) K_ASM_ARGS_##nr			\
 62			: "memory", K_CALL_CLOB_REGS K_CLOB_ARGS_##nr	\
 63		);							\
 64		__sys_res = (long)__res;				\
 65	}								\
 66	__sys_res;							\
 67})
 68
 69#define K_LOAD_ARGS_0()
 70#define K_LOAD_ARGS_1(r26)					\
 71	register unsigned long __r26 __asm__("r26") = (unsigned long)(r26);   \
 72	K_LOAD_ARGS_0()
 73#define K_LOAD_ARGS_2(r26,r25)					\
 74	register unsigned long __r25 __asm__("r25") = (unsigned long)(r25);   \
 75	K_LOAD_ARGS_1(r26)
 76#define K_LOAD_ARGS_3(r26,r25,r24)				\
 77	register unsigned long __r24 __asm__("r24") = (unsigned long)(r24);   \
 78	K_LOAD_ARGS_2(r26,r25)
 79#define K_LOAD_ARGS_4(r26,r25,r24,r23)				\
 80	register unsigned long __r23 __asm__("r23") = (unsigned long)(r23);   \
 81	K_LOAD_ARGS_3(r26,r25,r24)
 82#define K_LOAD_ARGS_5(r26,r25,r24,r23,r22)			\
 83	register unsigned long __r22 __asm__("r22") = (unsigned long)(r22);   \
 84	K_LOAD_ARGS_4(r26,r25,r24,r23)
 85#define K_LOAD_ARGS_6(r26,r25,r24,r23,r22,r21)			\
 86	register unsigned long __r21 __asm__("r21") = (unsigned long)(r21);   \
 87	K_LOAD_ARGS_5(r26,r25,r24,r23,r22)
 88
 89/* Even with zero args we use r20 for the syscall number */
 90#define K_ASM_ARGS_0
 91#define K_ASM_ARGS_1 K_ASM_ARGS_0, "r" (__r26)
 92#define K_ASM_ARGS_2 K_ASM_ARGS_1, "r" (__r25)
 93#define K_ASM_ARGS_3 K_ASM_ARGS_2, "r" (__r24)
 94#define K_ASM_ARGS_4 K_ASM_ARGS_3, "r" (__r23)
 95#define K_ASM_ARGS_5 K_ASM_ARGS_4, "r" (__r22)
 96#define K_ASM_ARGS_6 K_ASM_ARGS_5, "r" (__r21)
 97
 98/* The registers not listed as inputs but clobbered */
 99#define K_CLOB_ARGS_6
100#define K_CLOB_ARGS_5 K_CLOB_ARGS_6, "%r21"
101#define K_CLOB_ARGS_4 K_CLOB_ARGS_5, "%r22"
102#define K_CLOB_ARGS_3 K_CLOB_ARGS_4, "%r23"
103#define K_CLOB_ARGS_2 K_CLOB_ARGS_3, "%r24"
104#define K_CLOB_ARGS_1 K_CLOB_ARGS_2, "%r25"
105#define K_CLOB_ARGS_0 K_CLOB_ARGS_1, "%r26"
106
107#define syscall0(name)						\
108	K_INLINE_SYSCALL(name, 0)
109#define syscall1(name, arg1)					\
110	K_INLINE_SYSCALL(name, 1, arg1)
111#define syscall2(name, arg1, arg2)				\
112	K_INLINE_SYSCALL(name, 2, arg1, arg2)
113#define syscall3(name, arg1, arg2, arg3)			\
114	K_INLINE_SYSCALL(name, 3, arg1, arg2, arg3)
115#define syscall4(name, arg1, arg2, arg3, arg4)			\
116	K_INLINE_SYSCALL(name, 4, arg1, arg2, arg3, arg4)
117#define syscall5(name, arg1, arg2, arg3, arg4, arg5)		\
118	K_INLINE_SYSCALL(name, 5, arg1, arg2, arg3, arg4, arg5)
119
120#define __ARCH_WANT_NEW_STAT
121#define __ARCH_WANT_STAT64
122#define __ARCH_WANT_SYS_ALARM
123#define __ARCH_WANT_SYS_GETHOSTNAME
124#define __ARCH_WANT_SYS_PAUSE
125#define __ARCH_WANT_SYS_SIGNAL
126#define __ARCH_WANT_SYS_TIME32
127#define __ARCH_WANT_COMPAT_SYS_SCHED_RR_GET_INTERVAL
128#define __ARCH_WANT_SYS_UTIME32
129#define __ARCH_WANT_SYS_WAITPID
130#define __ARCH_WANT_SYS_SOCKETCALL
131#define __ARCH_WANT_SYS_FADVISE64
132#define __ARCH_WANT_SYS_GETPGRP
133#define __ARCH_WANT_SYS_NICE
134#define __ARCH_WANT_SYS_SIGPENDING
135#define __ARCH_WANT_SYS_SIGPROCMASK
136#define __ARCH_WANT_SYS_FORK
137#define __ARCH_WANT_SYS_VFORK
138#define __ARCH_WANT_SYS_CLONE
139#define __ARCH_WANT_COMPAT_SYS_SENDFILE
140#define __ARCH_WANT_COMPAT_STAT
141
142#ifdef CONFIG_64BIT
143#define __ARCH_WANT_SYS_TIME
144#define __ARCH_WANT_SYS_UTIME
145#endif
146
147#endif /* __ASSEMBLER__ */
148
149#undef STR
150
151#endif /* _ASM_PARISC_UNISTD_H_ */