home *** CD-ROM | disk | FTP | other *** search
/ Il CD di internet / CD.iso / SOURCE / KERNEL-S / V1.2 / LINUX-1.2 / LINUX-1 / linux / include / asm-mips / unistd.h < prev   
Encoding:
C/C++ Source or Header  |  1995-01-11  |  3.7 KB  |  127 lines
  1. #ifndef __ASM_MIPS_UNISTD_H
  2. #define __ASM_MIPS_UNISTD_H
  3.  
  4. #ifdef __KERNEL__
  5.  
  6. #include <asm/mipsconfig.h>
  7. /*
  8.  * Ugly kludge to enforce 32bit mode proof code.
  9.  * Access errno via USEG, not KSEGx for internal kernel syscalls
  10.  */
  11. #define errno (*(int *)((unsigned long)&errno - KERNELBASE))
  12.  
  13. #endif /* __KERNEL__ */
  14.  
  15. /* XXX - _foo needs to be __foo, while __NR_bar could be _NR_bar. */
  16. #define _syscall0(type,name) \
  17. type name(void) \
  18. { \
  19. register long __res __asm__ ("$2"); \
  20. __asm__ volatile ("syscall" \
  21.                   : "=r" (__res) \
  22.                   : "0" (__NR_##name)); \
  23. if (__res >= 0) \
  24.     return (type) __res; \
  25. errno = -__res; \
  26. return -1; \
  27. }
  28.  
  29. #define _syscall1(type,name,atype,a) \
  30. type name(atype a) \
  31. { \
  32. register long __res __asm__ ("$2"); \
  33. __asm__ volatile ("move\t$4,%2\n\t" \
  34.                   "syscall" \
  35.                   : "=r" (__res) \
  36.                   : "0" (__NR_##name),"r" ((long)(a)) \
  37.                   : "$4"); \
  38. if (__res >= 0) \
  39.     return (type) __res; \
  40. errno = -__res; \
  41. return -1; \
  42. }
  43.  
  44. #define _syscall2(type,name,atype,a,btype,b) \
  45. type name(atype a,btype b) \
  46. { \
  47. register long __res __asm__ ("$2"); \
  48. __asm__ volatile ("move\t$4,%2\n\t" \
  49.                   "move\t$5,%3\n\t" \
  50.                   "syscall" \
  51.                   : "=r" (__res) \
  52.                   : "0" (__NR_##name),"r" ((long)(a)), \
  53.                                       "r" ((long)(b))); \
  54.                   : "$4","$5"); \
  55. if (__res >= 0) \
  56.     return (type) __res; \
  57. errno = -__res; \
  58. return -1; \
  59. }
  60.  
  61. #define _syscall3(type,name,atype,a,btype,b,ctype,c) \
  62. type name (atype a, btype b, ctype c) \
  63. { \
  64. register long __res __asm__ ("$2"); \
  65. __asm__ volatile ("move\t$4,%2\n\t" \
  66.                   "move\t$5,%3\n\t" \
  67.                   "move\t$6,%4\n\t" \
  68.                   "syscall" \
  69.                   : "=r" (__res) \
  70.                   : "0" (__NR_##name),"r" ((long)(a)), \
  71.                                       "r" ((long)(b)), \
  72.                                       "r" ((long)(c)) \
  73.                   : "$4","$5","$6"); \
  74. if (__res>=0) \
  75.     return (type) __res; \
  76. errno=-__res; \
  77. return -1; \
  78. }
  79.  
  80. #define _syscall4(type,name,atype,a,btype,b,ctype,c,dtype,d) \
  81. type name (atype a, btype b, ctype c, dtype d) \
  82. { \
  83. register long __res __asm__ ("$2"); \
  84. __asm__ volatile (".set\tnoat\n\t" \
  85.                   "move\t$4,%2\n\t" \
  86.                   "move\t$5,%3\n\t" \
  87.                   "move\t$6,%4\n\t" \
  88.                   "move\t$7,%5\n\t" \
  89.                   "syscall" \
  90.                   : "=r" (__res) \
  91.                   : "0" (__NR_##name),"r" ((long)(a)), \
  92.                                       "r" ((long)(b)), \
  93.                                       "r" ((long)(c)), \
  94.                                       "r" ((long)(d)) \
  95.                   : "$4","$5","$6","$7"); \
  96. if (__res>=0) \
  97.     return (type) __res; \
  98. errno=-__res; \
  99. return -1; \
  100. }
  101.  
  102. #define _syscall5(type,name,atype,a,btype,b,ctype,c,dtype,d,etype,e) \
  103. type name (atype a,btype b,ctype c,dtype d,etype e) \
  104. { \
  105. register long __res __asm__ ("$2"); \
  106. __asm__ volatile (".set\tnoat\n\t" \
  107.                   "move\t$4,%2\n\t" \
  108.                   "move\t$5,%3\n\t" \
  109.                   "move\t$6,%4\n\t" \
  110.                   "move\t$7,%5\n\t" \
  111.                   "move\t$3,%6\n\t" \
  112.                   "syscall" \
  113.                   : "=r" (__res) \
  114.                   : "0" (__NR_##name),"r" ((long)(a)), \
  115.                                       "r" ((long)(b)), \
  116.                                       "r" ((long)(c)), \
  117.                                       "r" ((long)(d)), \
  118.                                       "r" ((long)(e)) \
  119.                   : "$3","$4","$5","$6","$7"); \
  120. if (__res>=0) \
  121.     return (type) __res; \
  122. errno=-__res; \
  123. return -1; \
  124. }
  125.  
  126. #endif /* __ASM_MIPS_UNISTD_H */
  127.