code.vuplus.com Git - vuplus_openembedded/blob - packages/parted/files/syscalls.h

   1 /*
   2  *  linux/include/asm-arm/unistd.h
   3  *
   4  *  Copyright (C) 2001-2005 Russell King
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * Please forward _all_ changes to this file to rmk@arm.linux.org.uk,
  11  * no matter what the change is.  Thanks!
  12  */
  13 #ifndef __ASM_ARM_UNISTD_H2
  14 #define __ASM_ARM_UNISTD_H2
  15
  16
  17 #define __sys2(x) #x
  18 #define __sys1(x) __sys2(x)
  19
  20 #ifndef __syscall
  21 #if defined(__thumb__) || defined(__ARM_EABI__)
  22 #define __SYS_REG(name) register long __sysreg __asm__("r7") = __NR_##name;
  23 #define __SYS_REG_LIST(regs...) "r" (__sysreg) , ##regs
  24 #define __syscall(name) "swi\t0"
  25 #else
  26 #define __SYS_REG(name)
  27 #define __SYS_REG_LIST(regs...) regs
  28 #define __syscall(name) "swi\t" __sys1(__NR_##name) ""
  29 #endif
  30 #endif
  31
  32 #define __syscall_return(type, res)                                     \
  33 do {                                                                    \
  34         if ((unsigned long)(res) >= (unsigned long)(-129)) {            \
  35                 errno = -(res);                                         \
  36                 res = -1;                                               \
  37         }                                                               \
  38         return (type) (res);                                            \
  39 } while (0)
  40
  41 #define _syscall0(type,name)                                            \
  42 type name(void) {                                                       \
  43   __SYS_REG(name)                                                       \
  44   register long __res_r0 __asm__("r0");                                 \
  45   long __res;                                                           \
  46   __asm__ __volatile__ (                                                \
  47   __syscall(name)                                                       \
  48         : "=r" (__res_r0)                                               \
  49         : __SYS_REG_LIST() );                                           \
  50   __res = __res_r0;                                                     \
  51   __syscall_return(type,__res);                                         \
  52 }
  53
  54 #define _syscall1(type,name,type1,arg1)                                 \
  55 type name(type1 arg1) {                                                 \
  56   __SYS_REG(name)                                                       \
  57   register long __r0 __asm__("r0") = (long)arg1;                        \
  58   register long __res_r0 __asm__("r0");                                 \
  59   long __res;                                                           \
  60   __asm__ __volatile__ (                                                \
  61   __syscall(name)                                                       \
  62         : "=r" (__res_r0)                                               \
  63         : __SYS_REG_LIST( "0" (__r0) ) );                               \
  64   __res = __res_r0;                                                     \
  65   __syscall_return(type,__res);                                         \
  66 }
  67
  68 #define _syscall2(type,name,type1,arg1,type2,arg2)                      \
  69 type name(type1 arg1,type2 arg2) {                                      \
  70   __SYS_REG(name)                                                       \
  71   register long __r0 __asm__("r0") = (long)arg1;                        \
  72   register long __r1 __asm__("r1") = (long)arg2;                        \
  73   register long __res_r0 __asm__("r0");                                 \
  74   long __res;                                                           \
  75   __asm__ __volatile__ (                                                \
  76   __syscall(name)                                                       \
  77         : "=r" (__res_r0)                                               \
  78         : __SYS_REG_LIST( "0" (__r0), "r" (__r1) ) );                   \
  79   __res = __res_r0;                                                     \
  80   __syscall_return(type,__res);                                         \
  81 }
  82
  83
  84 #define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3)           \
  85 type name(type1 arg1,type2 arg2,type3 arg3) {                           \
  86   __SYS_REG(name)                                                       \
  87   register long __r0 __asm__("r0") = (long)arg1;                        \
  88   register long __r1 __asm__("r1") = (long)arg2;                        \
  89   register long __r2 __asm__("r2") = (long)arg3;                        \
  90   register long __res_r0 __asm__("r0");                                 \
  91   long __res;                                                           \
  92   __asm__ __volatile__ (                                                \
  93   __syscall(name)                                                       \
  94         : "=r" (__res_r0)                                               \
  95         : __SYS_REG_LIST( "0" (__r0), "r" (__r1), "r" (__r2) ) );       \
  96   __res = __res_r0;                                                     \
  97   __syscall_return(type,__res);                                         \
  98 }
  99
 100
 101 #define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4)\
 102 type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4) {             \
 103   __SYS_REG(name)                                                       \
 104   register long __r0 __asm__("r0") = (long)arg1;                        \
 105   register long __r1 __asm__("r1") = (long)arg2;                        \
 106   register long __r2 __asm__("r2") = (long)arg3;                        \
 107   register long __r3 __asm__("r3") = (long)arg4;                        \
 108   register long __res_r0 __asm__("r0");                                 \
 109   long __res;                                                           \
 110   __asm__ __volatile__ (                                                \
 111   __syscall(name)                                                       \
 112         : "=r" (__res_r0)                                               \
 113         : __SYS_REG_LIST( "0" (__r0), "r" (__r1), "r" (__r2), "r" (__r3) ) ); \
 114   __res = __res_r0;                                                     \
 115   __syscall_return(type,__res);                                         \
 116 }
 117
 118
 119 #define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5)     \
 120 type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5) { \
 121   __SYS_REG(name)                                                       \
 122   register long __r0 __asm__("r0") = (long)arg1;                        \
 123   register long __r1 __asm__("r1") = (long)arg2;                        \
 124   register long __r2 __asm__("r2") = (long)arg3;                        \
 125   register long __r3 __asm__("r3") = (long)arg4;                        \
 126   register long __r4 __asm__("r4") = (long)arg5;                        \
 127   register long __res_r0 __asm__("r0");                                 \
 128   long __res;                                                           \
 129   __asm__ __volatile__ (                                                \
 130   __syscall(name)                                                       \
 131         : "=r" (__res_r0)                                               \
 132         : __SYS_REG_LIST( "0" (__r0), "r" (__r1), "r" (__r2),           \
 133                           "r" (__r3), "r" (__r4) ) );                   \
 134   __res = __res_r0;                                                     \
 135   __syscall_return(type,__res);                                         \
 136 }
 137
 138 #define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5,type6,arg6)  \
 139 type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5, type6 arg6) {     \
 140   __SYS_REG(name)                                                       \
 141   register long __r0 __asm__("r0") = (long)arg1;                        \
 142   register long __r1 __asm__("r1") = (long)arg2;                        \
 143   register long __r2 __asm__("r2") = (long)arg3;                        \
 144   register long __r3 __asm__("r3") = (long)arg4;                        \
 145   register long __r4 __asm__("r4") = (long)arg5;                        \
 146   register long __r5 __asm__("r5") = (long)arg6;                        \
 147   register long __res_r0 __asm__("r0");                                 \
 148   long __res;                                                           \
 149   __asm__ __volatile__ (                                                \
 150   __syscall(name)                                                       \
 151         : "=r" (__res_r0)                                               \
 152         : __SYS_REG_LIST( "0" (__r0), "r" (__r1), "r" (__r2),           \
 153                           "r" (__r3), "r" (__r4), "r" (__r5) ) );       \
 154   __res = __res_r0;                                                     \
 155   __syscall_return(type,__res);                                         \
 156 }
 157
 158 /*
 159  * "Conditional" syscalls
 160  *
 161  * What we want is __attribute__((weak,alias("sys_ni_syscall"))),
 162  * but it doesn't work on all toolchains, so we just do it by hand
 163  */
 164 #define cond_syscall(x) asm(".weak\t" #x "\n\t.set\t" #x ",sys_ni_syscall")
 165
 166 #endif /* __ASM_ARM_UNISTD_H2 */