arch/i386/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) __SYSCALL_LL_E((x))
   5
   6 #if SYSCALL_NO_TLS
   7 #define SYSCALL_INSNS "int $128"
   8 #else
   9 #define SYSCALL_INSNS "call *%%gs:16"
  10 #endif
  11
  12 #define SYSCALL_INSNS_12 "xchg %%ebx,%%edx ; " SYSCALL_INSNS " ; xchg %%ebx,%%edx"
  13 #define SYSCALL_INSNS_34 "xchg %%ebx,%%edi ; " SYSCALL_INSNS " ; xchg %%ebx,%%edi"
  14
  15 static inline long __syscall0(long n)
  16 {
  17         unsigned long __ret;
  18         __asm__ __volatile__ (SYSCALL_INSNS : "=a"(__ret) : "a"(n) : "memory");
  19         return __ret;
  20 }
  21
  22 static inline long __syscall1(long n, long a1)
  23 {
  24         unsigned long __ret;
  25         __asm__ __volatile__ (SYSCALL_INSNS_12 : "=a"(__ret) : "a"(n), "d"(a1) : "memory");
  26         return __ret;
  27 }
  28
  29 static inline long __syscall2(long n, long a1, long a2)
  30 {
  31         unsigned long __ret;
  32         __asm__ __volatile__ (SYSCALL_INSNS_12 : "=a"(__ret) : "a"(n), "d"(a1), "c"(a2) : "memory");
  33         return __ret;
  34 }
  35
  36 static inline long __syscall3(long n, long a1, long a2, long a3)
  37 {
  38         unsigned long __ret;
  39 #if !defined(__PIC__) || !defined(BROKEN_EBX_ASM)
  40         __asm__ __volatile__ (SYSCALL_INSNS : "=a"(__ret) : "a"(n), "b"(a1), "c"(a2), "d"(a3) : "memory");
  41 #else
  42         __asm__ __volatile__ (SYSCALL_INSNS_34 : "=a"(__ret) : "a"(n), "D"(a1), "c"(a2), "d"(a3) : "memory");
  43 #endif
  44         return __ret;
  45 }
  46
  47 static inline long __syscall4(long n, long a1, long a2, long a3, long a4)
  48 {
  49         unsigned long __ret;
  50 #if !defined(__PIC__) || !defined(BROKEN_EBX_ASM)
  51         __asm__ __volatile__ (SYSCALL_INSNS : "=a"(__ret) : "a"(n), "b"(a1), "c"(a2), "d"(a3), "S"(a4) : "memory");
  52 #else
  53         __asm__ __volatile__ (SYSCALL_INSNS_34 : "=a"(__ret) : "a"(n), "D"(a1), "c"(a2), "d"(a3), "S"(a4) : "memory");
  54 #endif
  55         return __ret;
  56 }
  57
  58 static inline long __syscall5(long n, long a1, long a2, long a3, long a4, long a5)
  59 {
  60         unsigned long __ret;
  61 #if !defined(__PIC__) || !defined(BROKEN_EBX_ASM)
  62         __asm__ __volatile__ (SYSCALL_INSNS
  63                 : "=a"(__ret) : "a"(n), "b"(a1), "c"(a2), "d"(a3), "S"(a4), "D"(a5) : "memory");
  64 #else
  65         __asm__ __volatile__ ("pushl %2 ; push %%ebx ; mov 4(%%esp),%%ebx ; " SYSCALL_INSNS " ; pop %%ebx ; add $4,%%esp"
  66                 : "=a"(__ret) : "a"(n), "g"(a1), "c"(a2), "d"(a3), "S"(a4), "D"(a5) : "memory");
  67 #endif
  68         return __ret;
  69 }
  70
  71 static inline long __syscall6(long n, long a1, long a2, long a3, long a4, long a5, long a6)
  72 {
  73         unsigned long __ret;
  74 #if !defined(__PIC__) || !defined(BROKEN_EBX_ASM)
  75         __asm__ __volatile__ ("pushl %7 ; push %%ebp ; mov 4(%%esp),%%ebp ; " SYSCALL_INSNS " ; pop %%ebp ; add $4,%%esp"
  76                 : "=a"(__ret) : "a"(n), "b"(a1), "c"(a2), "d"(a3), "S"(a4), "D"(a5), "g"(a6) : "memory");
  77 #else
  78         unsigned long a1a6[2] = { a1, a6 };
  79         __asm__ __volatile__ ("pushl %1 ; push %%ebx ; push %%ebp ; mov 8(%%esp),%%ebx ; mov 4(%%ebx),%%ebp ; mov (%%ebx),%%ebx ; " SYSCALL_INSNS " ; pop %%ebp ; pop %%ebx ; add $4,%%esp"
  80                 : "=a"(__ret) : "g"(&a1a6), "a"(n), "c"(a2), "d"(a3), "S"(a4), "D"(a5) : "memory");
  81 #endif
  82         return __ret;
  83 }
  84
  85 #define VDSO_USEFUL
  86 #define VDSO_CGT32_SYM "__vdso_clock_gettime"
  87 #define VDSO_CGT32_VER "LINUX_2.6"
  88 #define VDSO_CGT_SYM "__vdso_clock_gettime64"
  89 #define VDSO_CGT_VER "LINUX_2.6"
  90
  91 #define SYSCALL_USE_SOCKETCALL