arch/parisc/include/asm/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 __ASSEMBLY__
  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 #ifdef 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" (SYS_ify(name)) K_ASM_ARGS_##nr           \
  62                         : "memory", K_CALL_CLOB_REGS K_CLOB_ARGS_##nr   \
  63                 );                                                      \
  64                 __sys_res = (long)__res;                                \
  65         }                                                               \
  66         if ( (unsigned long)__sys_res >= (unsigned long)-4095 ){        \
  67                 errno = -__sys_res;                                     \
  68                 __sys_res = -1;                                         \
  69         }                                                               \
  70         __sys_res;                                                      \
  71 })
  72
  73 #define K_LOAD_ARGS_0()
  74 #define K_LOAD_ARGS_1(r26)                                      \
  75         register unsigned long __r26 __asm__("r26") = (unsigned long)(r26);   \
  76         K_LOAD_ARGS_0()
  77 #define K_LOAD_ARGS_2(r26,r25)                                  \
  78         register unsigned long __r25 __asm__("r25") = (unsigned long)(r25);   \
  79         K_LOAD_ARGS_1(r26)
  80 #define K_LOAD_ARGS_3(r26,r25,r24)                              \
  81         register unsigned long __r24 __asm__("r24") = (unsigned long)(r24);   \
  82         K_LOAD_ARGS_2(r26,r25)
  83 #define K_LOAD_ARGS_4(r26,r25,r24,r23)                          \
  84         register unsigned long __r23 __asm__("r23") = (unsigned long)(r23);   \
  85         K_LOAD_ARGS_3(r26,r25,r24)
  86 #define K_LOAD_ARGS_5(r26,r25,r24,r23,r22)                      \
  87         register unsigned long __r22 __asm__("r22") = (unsigned long)(r22);   \
  88         K_LOAD_ARGS_4(r26,r25,r24,r23)
  89 #define K_LOAD_ARGS_6(r26,r25,r24,r23,r22,r21)                  \
  90         register unsigned long __r21 __asm__("r21") = (unsigned long)(r21);   \
  91         K_LOAD_ARGS_5(r26,r25,r24,r23,r22)
  92
  93 /* Even with zero args we use r20 for the syscall number */
  94 #define K_ASM_ARGS_0
  95 #define K_ASM_ARGS_1 K_ASM_ARGS_0, "r" (__r26)
  96 #define K_ASM_ARGS_2 K_ASM_ARGS_1, "r" (__r25)
  97 #define K_ASM_ARGS_3 K_ASM_ARGS_2, "r" (__r24)
  98 #define K_ASM_ARGS_4 K_ASM_ARGS_3, "r" (__r23)
  99 #define K_ASM_ARGS_5 K_ASM_ARGS_4, "r" (__r22)
 100 #define K_ASM_ARGS_6 K_ASM_ARGS_5, "r" (__r21)
 101
 102 /* The registers not listed as inputs but clobbered */
 103 #define K_CLOB_ARGS_6
 104 #define K_CLOB_ARGS_5 K_CLOB_ARGS_6, "%r21"
 105 #define K_CLOB_ARGS_4 K_CLOB_ARGS_5, "%r22"
 106 #define K_CLOB_ARGS_3 K_CLOB_ARGS_4, "%r23"
 107 #define K_CLOB_ARGS_2 K_CLOB_ARGS_3, "%r24"
 108 #define K_CLOB_ARGS_1 K_CLOB_ARGS_2, "%r25"
 109 #define K_CLOB_ARGS_0 K_CLOB_ARGS_1, "%r26"
 110
 111 #define _syscall0(type,name)                                            \
 112 type name(void)                                                         \
 113 {                                                                       \
 114     return K_INLINE_SYSCALL(name, 0);                                   \
 115 }
 116
 117 #define _syscall1(type,name,type1,arg1)                                 \
 118 type name(type1 arg1)                                                   \
 119 {                                                                       \
 120     return K_INLINE_SYSCALL(name, 1, arg1);                             \
 121 }
 122
 123 #define _syscall2(type,name,type1,arg1,type2,arg2)                      \
 124 type name(type1 arg1, type2 arg2)                                       \
 125 {                                                                       \
 126     return K_INLINE_SYSCALL(name, 2, arg1, arg2);                       \
 127 }
 128
 129 #define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3)           \
 130 type name(type1 arg1, type2 arg2, type3 arg3)                           \
 131 {                                                                       \
 132     return K_INLINE_SYSCALL(name, 3, arg1, arg2, arg3);                 \
 133 }
 134
 135 #define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
 136 type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4)               \
 137 {                                                                       \
 138     return K_INLINE_SYSCALL(name, 4, arg1, arg2, arg3, arg4);           \
 139 }
 140
 141 /* select takes 5 arguments */
 142 #define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5) \
 143 type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5)   \
 144 {                                                                       \
 145     return K_INLINE_SYSCALL(name, 5, arg1, arg2, arg3, arg4, arg5);     \
 146 }
 147
 148 #define __ARCH_WANT_NEW_STAT
 149 #define __ARCH_WANT_OLD_READDIR
 150 #define __ARCH_WANT_STAT64
 151 #define __ARCH_WANT_SYS_ALARM
 152 #define __ARCH_WANT_SYS_GETHOSTNAME
 153 #define __ARCH_WANT_SYS_PAUSE
 154 #define __ARCH_WANT_SYS_SIGNAL
 155 #define __ARCH_WANT_SYS_TIME32
 156 #define __ARCH_WANT_COMPAT_SYS_SCHED_RR_GET_INTERVAL
 157 #define __ARCH_WANT_SYS_UTIME32
 158 #define __ARCH_WANT_SYS_WAITPID
 159 #define __ARCH_WANT_SYS_SOCKETCALL
 160 #define __ARCH_WANT_SYS_FADVISE64
 161 #define __ARCH_WANT_SYS_GETPGRP
 162 #define __ARCH_WANT_SYS_NICE
 163 #define __ARCH_WANT_SYS_OLDUMOUNT
 164 #define __ARCH_WANT_SYS_SIGPENDING
 165 #define __ARCH_WANT_SYS_SIGPROCMASK
 166 #define __ARCH_WANT_SYS_FORK
 167 #define __ARCH_WANT_SYS_VFORK
 168 #define __ARCH_WANT_SYS_CLONE
 169 #define __ARCH_WANT_COMPAT_SYS_SENDFILE
 170
 171 #ifdef CONFIG_64BIT
 172 #define __ARCH_WANT_SYS_TIME
 173 #define __ARCH_WANT_SYS_UTIME
 174 #endif
 175
 176 #endif /* __ASSEMBLY__ */
 177
 178 #undef STR
 179
 180 #endif /* _ASM_PARISC_UNISTD_H_ */