arch/parisc/include/asm/unistd.h

   1 #ifndef _ASM_PARISC_UNISTD_H_
   2 #define _ASM_PARISC_UNISTD_H_
   3
   4 #include <uapi/asm/unistd.h>
   5
   6 #ifndef __ASSEMBLY__
   7
   8 #define SYS_ify(syscall_name)   __NR_##syscall_name
   9
  10 #ifndef ASM_LINE_SEP
  11 # define ASM_LINE_SEP ;
  12 #endif
  13
  14 /* Definition taken from glibc 2.3.3
  15  * sysdeps/unix/sysv/linux/hppa/sysdep.h
  16  */
  17
  18 #ifdef PIC
  19 /* WARNING: CANNOT BE USED IN A NOP! */
  20 # define K_STW_ASM_PIC  "       copy %%r19, %%r4\n"
  21 # define K_LDW_ASM_PIC  "       copy %%r4, %%r19\n"
  22 # define K_USING_GR4    "%r4",
  23 #else
  24 # define K_STW_ASM_PIC  " \n"
  25 # define K_LDW_ASM_PIC  " \n"
  26 # define K_USING_GR4
  27 #endif
  28
  29 /* GCC has to be warned that a syscall may clobber all the ABI
  30    registers listed as "caller-saves", see page 8, Table 2
  31    in section 2.2.6 of the PA-RISC RUN-TIME architecture
  32    document. However! r28 is the result and will conflict with
  33    the clobber list so it is left out. Also the input arguments
  34    registers r20 -> r26 will conflict with the list so they
  35    are treated specially. Although r19 is clobbered by the syscall
  36    we cannot say this because it would violate ABI, thus we say
  37    r4 is clobbered and use that register to save/restore r19
  38    across the syscall. */
  39
  40 #define K_CALL_CLOB_REGS "%r1", "%r2", K_USING_GR4 \
  41                          "%r20", "%r29", "%r31"
  42
  43 #undef K_INLINE_SYSCALL
  44 #define K_INLINE_SYSCALL(name, nr, args...)     ({                      \
  45         long __sys_res;                                                 \
  46         {                                                               \
  47                 register unsigned long __res __asm__("r28");            \
  48                 K_LOAD_ARGS_##nr(args)                                  \
  49                 /* FIXME: HACK stw/ldw r19 around syscall */            \
  50                 __asm__ volatile(                                       \
  51                         K_STW_ASM_PIC                                   \
  52                         "       ble  0x100(%%sr2, %%r0)\n"              \
  53                         "       ldi %1, %%r20\n"                        \
  54                         K_LDW_ASM_PIC                                   \
  55                         : "=r" (__res)                                  \
  56                         : "i" (SYS_ify(name)) K_ASM_ARGS_##nr           \
  57                         : "memory", K_CALL_CLOB_REGS K_CLOB_ARGS_##nr   \
  58                 );                                                      \
  59                 __sys_res = (long)__res;                                \
  60         }                                                               \
  61         if ( (unsigned long)__sys_res >= (unsigned long)-4095 ){        \
  62                 errno = -__sys_res;                                     \
  63                 __sys_res = -1;                                         \
  64         }                                                               \
  65         __sys_res;                                                      \
  66 })
  67
  68 #define K_LOAD_ARGS_0()
  69 #define K_LOAD_ARGS_1(r26)                                      \
  70         register unsigned long __r26 __asm__("r26") = (unsigned long)(r26);   \
  71         K_LOAD_ARGS_0()
  72 #define K_LOAD_ARGS_2(r26,r25)                                  \
  73         register unsigned long __r25 __asm__("r25") = (unsigned long)(r25);   \
  74         K_LOAD_ARGS_1(r26)
  75 #define K_LOAD_ARGS_3(r26,r25,r24)                              \
  76         register unsigned long __r24 __asm__("r24") = (unsigned long)(r24);   \
  77         K_LOAD_ARGS_2(r26,r25)
  78 #define K_LOAD_ARGS_4(r26,r25,r24,r23)                          \
  79         register unsigned long __r23 __asm__("r23") = (unsigned long)(r23);   \
  80         K_LOAD_ARGS_3(r26,r25,r24)
  81 #define K_LOAD_ARGS_5(r26,r25,r24,r23,r22)                      \
  82         register unsigned long __r22 __asm__("r22") = (unsigned long)(r22);   \
  83         K_LOAD_ARGS_4(r26,r25,r24,r23)
  84 #define K_LOAD_ARGS_6(r26,r25,r24,r23,r22,r21)                  \
  85         register unsigned long __r21 __asm__("r21") = (unsigned long)(r21);   \
  86         K_LOAD_ARGS_5(r26,r25,r24,r23,r22)
  87
  88 /* Even with zero args we use r20 for the syscall number */
  89 #define K_ASM_ARGS_0
  90 #define K_ASM_ARGS_1 K_ASM_ARGS_0, "r" (__r26)
  91 #define K_ASM_ARGS_2 K_ASM_ARGS_1, "r" (__r25)
  92 #define K_ASM_ARGS_3 K_ASM_ARGS_2, "r" (__r24)
  93 #define K_ASM_ARGS_4 K_ASM_ARGS_3, "r" (__r23)
  94 #define K_ASM_ARGS_5 K_ASM_ARGS_4, "r" (__r22)
  95 #define K_ASM_ARGS_6 K_ASM_ARGS_5, "r" (__r21)
  96
  97 /* The registers not listed as inputs but clobbered */
  98 #define K_CLOB_ARGS_6
  99 #define K_CLOB_ARGS_5 K_CLOB_ARGS_6, "%r21"
 100 #define K_CLOB_ARGS_4 K_CLOB_ARGS_5, "%r22"
 101 #define K_CLOB_ARGS_3 K_CLOB_ARGS_4, "%r23"
 102 #define K_CLOB_ARGS_2 K_CLOB_ARGS_3, "%r24"
 103 #define K_CLOB_ARGS_1 K_CLOB_ARGS_2, "%r25"
 104 #define K_CLOB_ARGS_0 K_CLOB_ARGS_1, "%r26"
 105
 106 #define _syscall0(type,name)                                            \
 107 type name(void)                                                         \
 108 {                                                                       \
 109     return K_INLINE_SYSCALL(name, 0);                                   \
 110 }
 111
 112 #define _syscall1(type,name,type1,arg1)                                 \
 113 type name(type1 arg1)                                                   \
 114 {                                                                       \
 115     return K_INLINE_SYSCALL(name, 1, arg1);                             \
 116 }
 117
 118 #define _syscall2(type,name,type1,arg1,type2,arg2)                      \
 119 type name(type1 arg1, type2 arg2)                                       \
 120 {                                                                       \
 121     return K_INLINE_SYSCALL(name, 2, arg1, arg2);                       \
 122 }
 123
 124 #define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3)           \
 125 type name(type1 arg1, type2 arg2, type3 arg3)                           \
 126 {                                                                       \
 127     return K_INLINE_SYSCALL(name, 3, arg1, arg2, arg3);                 \
 128 }
 129
 130 #define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
 131 type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4)               \
 132 {                                                                       \
 133     return K_INLINE_SYSCALL(name, 4, arg1, arg2, arg3, arg4);           \
 134 }
 135
 136 /* select takes 5 arguments */
 137 #define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5) \
 138 type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5)   \
 139 {                                                                       \
 140     return K_INLINE_SYSCALL(name, 5, arg1, arg2, arg3, arg4, arg5);     \
 141 }
 142
 143 #define __ARCH_WANT_OLD_READDIR
 144 #define __ARCH_WANT_STAT64
 145 #define __ARCH_WANT_SYS_ALARM
 146 #define __ARCH_WANT_SYS_GETHOSTNAME
 147 #define __ARCH_WANT_SYS_PAUSE
 148 #define __ARCH_WANT_SYS_SGETMASK
 149 #define __ARCH_WANT_SYS_SIGNAL
 150 #define __ARCH_WANT_SYS_TIME
 151 #define __ARCH_WANT_COMPAT_SYS_TIME
 152 #define __ARCH_WANT_SYS_UTIME
 153 #define __ARCH_WANT_SYS_WAITPID
 154 #define __ARCH_WANT_SYS_SOCKETCALL
 155 #define __ARCH_WANT_SYS_FADVISE64
 156 #define __ARCH_WANT_SYS_GETPGRP
 157 #define __ARCH_WANT_SYS_LLSEEK
 158 #define __ARCH_WANT_SYS_NICE
 159 #define __ARCH_WANT_SYS_OLD_GETRLIMIT
 160 #define __ARCH_WANT_SYS_OLDUMOUNT
 161 #define __ARCH_WANT_SYS_SIGPENDING
 162 #define __ARCH_WANT_SYS_SIGPROCMASK
 163 #define __ARCH_WANT_SYS_RT_SIGACTION
 164 #define __ARCH_WANT_SYS_RT_SIGSUSPEND
 165 #define __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND
 166 #define __ARCH_WANT_SYS_EXECVE
 167 #define __ARCH_WANT_SYS_FORK
 168 #define __ARCH_WANT_SYS_VFORK
 169 #define __ARCH_WANT_SYS_CLONE
 170
 171 #endif /* __ASSEMBLY__ */
 172
 173 #undef STR
 174
 175 /*
 176  * "Conditional" syscalls
 177  *
 178  * What we want is __attribute__((weak,alias("sys_ni_syscall"))),
 179  * but it doesn't work on all toolchains, so we just do it by hand
 180  */
 181 #define cond_syscall(x) asm(".weak\t" #x "\n\t.set\t" #x ",sys_ni_syscall")
 182
 183 #endif /* _ASM_PARISC_UNISTD_H_ */