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 #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 /* __ASSEMBLY__ */
 148
 149 #undef STR
 150
 151 #endif /* _ASM_PARISC_UNISTD_H_ */