arch/mips/syscall_arch.h

   1 #define __SYSCALL_LL_E(x) \
   2 ((union { long long ll; long l[2]; }){ .ll = x }).l[0], \
   3 ((union { long long ll; long l[2]; }){ .ll = x }).l[1]
   4 #define __SYSCALL_LL_O(x) 0, __SYSCALL_LL_E((x))
   5
   6 __attribute__((visibility("hidden")))
   7 long (__syscall)(long, ...);
   8
   9 #define SYSCALL_RLIM_INFINITY (-1UL/2)
  10
  11 #if _MIPSEL || __MIPSEL || __MIPSEL__
  12 #define __stat_fix(st) ((st),(void)0)
  13 #else
  14 #include <sys/stat.h>
  15 static inline void __stat_fix(long p)
  16 {
  17         struct stat *st = (struct stat *)p;
  18         st->st_dev >>= 32;
  19         st->st_rdev >>= 32;
  20 }
  21 #endif
  22
  23 static inline long __syscall0(long n)
  24 {
  25         register long r7 __asm__("$7");
  26         register long r2 __asm__("$2");
  27         __asm__ __volatile__ (
  28                 "addu $2,$0,%2 ; syscall"
  29                 : "=&r"(r2), "=r"(r7) : "ir"(n), "0"(r2), "1"(r7)
  30                 : "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13",
  31                   "$14", "$15", "$24", "$25", "hi", "lo", "memory");
  32         return r7 ? -r2 : r2;
  33 }
  34
  35 static inline long __syscall1(long n, long a)
  36 {
  37         register long r4 __asm__("$4") = a;
  38         register long r7 __asm__("$7");
  39         register long r2 __asm__("$2");
  40         __asm__ __volatile__ (
  41                 "addu $2,$0,%2 ; syscall"
  42                 : "=&r"(r2), "=r"(r7) : "ir"(n), "0"(r2), "1"(r7),
  43                   "r"(r4)
  44                 : "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13",
  45                   "$14", "$15", "$24", "$25", "hi", "lo", "memory");
  46         return r7 ? -r2 : r2;
  47 }
  48
  49 static inline long __syscall2(long n, long a, long b)
  50 {
  51         register long r4 __asm__("$4") = a;
  52         register long r5 __asm__("$5") = b;
  53         register long r7 __asm__("$7");
  54         register long r2 __asm__("$2");
  55         __asm__ __volatile__ (
  56                 "addu $2,$0,%2 ; syscall"
  57                 : "=&r"(r2), "=r"(r7) : "ir"(n), "0"(r2), "1"(r7),
  58                   "r"(r4), "r"(r5)
  59                 : "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13",
  60                   "$14", "$15", "$24", "$25", "hi", "lo", "memory");
  61         if (r7) return -r2;
  62         long ret = r2;
  63         if (n == SYS_stat64 || n == SYS_fstat64 || n == SYS_lstat64) __stat_fix(b);
  64         return ret;
  65 }
  66
  67 static inline long __syscall3(long n, long a, long b, long c)
  68 {
  69         register long r4 __asm__("$4") = a;
  70         register long r5 __asm__("$5") = b;
  71         register long r6 __asm__("$6") = c;
  72         register long r7 __asm__("$7");
  73         register long r2 __asm__("$2");
  74         __asm__ __volatile__ (
  75                 "addu $2,$0,%2 ; syscall"
  76                 : "=&r"(r2), "=r"(r7) : "ir"(n), "0"(r2), "1"(r7),
  77                   "r"(r4), "r"(r5), "r"(r6)
  78                 : "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13",
  79                   "$14", "$15", "$24", "$25", "hi", "lo", "memory");
  80         if (r7) return -r2;
  81         long ret = r2;
  82         if (n == SYS_stat64 || n == SYS_fstat64 || n == SYS_lstat64) __stat_fix(b);
  83         return ret;
  84 }
  85
  86 static inline long __syscall4(long n, long a, long b, long c, long d)
  87 {
  88         register long r4 __asm__("$4") = a;
  89         register long r5 __asm__("$5") = b;
  90         register long r6 __asm__("$6") = c;
  91         register long r7 __asm__("$7") = d;
  92         register long r2 __asm__("$2");
  93         __asm__ __volatile__ (
  94                 "addu $2,$0,%2 ; syscall"
  95                 : "=&r"(r2), "=r"(r7) : "ir"(n), "0"(r2), "1"(r7),
  96                   "r"(r4), "r"(r5), "r"(r6)
  97                 : "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13",
  98                   "$14", "$15", "$24", "$25", "hi", "lo", "memory");
  99         if (r7) return -r2;
 100         long ret = r2;
 101         if (n == SYS_stat64 || n == SYS_fstat64 || n == SYS_lstat64) __stat_fix(b);
 102         if (n == SYS_fstatat) __stat_fix(c);
 103         return ret;
 104 }
 105
 106 static inline long __syscall5(long n, long a, long b, long c, long d, long e)
 107 {
 108         long r2 = (__syscall)(n, a, b, c, d, e);
 109         if (r2 > -4096UL) return r2;
 110         if (n == SYS_stat64 || n == SYS_fstat64 || n == SYS_lstat64) __stat_fix(b);
 111         if (n == SYS_fstatat) __stat_fix(c);
 112         return r2;
 113 }
 114
 115 static inline long __syscall6(long n, long a, long b, long c, long d, long e, long f)
 116 {
 117         long r2 = (__syscall)(n, a, b, c, d, e, f);
 118         if (r2 > -4096UL) return r2;
 119         if (n == SYS_stat64 || n == SYS_fstat64 || n == SYS_lstat64) __stat_fix(b);
 120         if (n == SYS_fstatat) __stat_fix(c);
 121         return r2;
 122 }
 123
 124 #define VDSO_USEFUL
 125 #define VDSO_CGT_SYM "__vdso_clock_gettime"
 126 #define VDSO_CGT_VER "LINUX_2.6"