l4/pkg/uclibc/lib/contrib/uclibc/libc/sysdeps/linux/avr32/bits/syscalls.h

   1 #ifndef _BITS_SYSCALLS_H
   2 #define _BITS_SYSCALLS_H
   3 #ifndef _SYSCALL_H
   4 # error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead."
   5 #endif
   6
   7 #ifndef __ASSEMBLER__
   8
   9 #include <errno.h>
  10
  11 #define INTERNAL_SYSCALL_NCS(name, err, nr, args...)                    \
  12         ({                                                              \
  13                 register int _a1 __asm__("r12");                        \
  14                 register int _scno __asm__("r8") = name;                \
  15                 LOAD_ARGS_##nr (args);                                  \
  16                 __asm__ __volatile__("scall     /* syscall " #name " */" \
  17                               : "=r" (_a1)                              \
  18                               : "r"(_scno) ASM_ARGS_##nr                \
  19                               : "cc", "memory");                        \
  20                 _a1;                                                    \
  21         })
  22
  23 #define INTERNAL_SYSCALL_ERROR_P(val, err)              \
  24         ((unsigned int)(val) >= 0xfffff001U)
  25
  26 #define LOAD_ARGS_0() do { } while(0)
  27 #define ASM_ARGS_0
  28 #define LOAD_ARGS_1(a1)                                 \
  29         _a1 = (int) (a1);                               \
  30         LOAD_ARGS_0()
  31 #define ASM_ARGS_1      ASM_ARGS_0, "r"(_a1)
  32 #define LOAD_ARGS_2(a1, a2)                             \
  33         register int _a2 __asm__("r11") = (int)(a2);    \
  34         LOAD_ARGS_1(a1)
  35 #define ASM_ARGS_2      ASM_ARGS_1, "r"(_a2)
  36 #define LOAD_ARGS_3(a1, a2, a3)                         \
  37         register int _a3 __asm__("r10") = (int)(a3);    \
  38         LOAD_ARGS_2(a1, a2)
  39 #define ASM_ARGS_3      ASM_ARGS_2, "r"(_a3)
  40 #define LOAD_ARGS_4(a1, a2, a3, a4)                     \
  41         register int _a4 __asm__("r9") = (int)(a4);     \
  42         LOAD_ARGS_3(a1, a2, a3)
  43 #define ASM_ARGS_4      ASM_ARGS_3, "r"(_a4)
  44 #define LOAD_ARGS_5(a1, a2, a3, a4, a5)                 \
  45         register int _a5 __asm__("r5") = (int)(a5);     \
  46         LOAD_ARGS_4(a1, a2, a3, a4)
  47 #define ASM_ARGS_5      ASM_ARGS_4, "r"(_a5)
  48 #define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6)             \
  49         register int _a6 __asm__("r3") = (int)(a6);     \
  50         LOAD_ARGS_5(a1, a2, a3, a4, a5)
  51 #define ASM_ARGS_6      ASM_ARGS_5, "r"(_a6)
  52
  53 #endif /* __ASSEMBLER__ */
  54 #endif /* _BITS_SYSCALLS_H */