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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 | /* * Copyright (C) 2013 Imagination Technologies Ltd. * * Licensed under LGPL v2.1 or later, see the file COPYING.LIB in this tarball. * */ #ifndef _BITS_SYSCALLS_H #define _BITS_SYSCALLS_H #ifndef _SYSCALL_H # error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead." #endif /* Meta version adapted from the ARM version. */ #define SYS_ify(syscall_name) (__NR_##syscall_name) #ifdef __ASSEMBLER__ /* Call a given syscall, with arguments loaded. */ #undef DO_CALL #define DO_CALL(syscall_name, args) \ MOV D1Re0, #SYS_ify (syscall_name); \ SWITCH #0x440001 #else #include <errno.h> #undef INLINE_SYSCALL_NCS #define INLINE_SYSCALL_NCS(name, nr, args...) \ (__extension__ \ ({ unsigned int _inline_sys_result = INTERNAL_SYSCALL_NCS (name, , nr, args); \ if (unlikely(INTERNAL_SYSCALL_ERROR_P (_inline_sys_result, ))) \ { \ __set_errno (INTERNAL_SYSCALL_ERRNO (_inline_sys_result, )); \ _inline_sys_result = (unsigned int) -1; \ } \ (int) _inline_sys_result; }) \ ) #undef INTERNAL_SYSCALL_DECL #define INTERNAL_SYSCALL_DECL(err) do { } while (0) #undef INTERNAL_SYSCALL_NCS #define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \ (__extension__ \ ({unsigned int __sys_result; \ { \ PREP_ARGS_##nr (args); \ register int _result __asm__ ("D0Re0"), _nr __asm__ ("D1Re0"); \ LOAD_ARGS_##nr; \ _nr = (name); \ __asm__ volatile ("SWITCH #0x440001 ! syscall " #name \ : "=r" (_result) \ : "d" (_nr) ASM_ARGS_##nr \ : "memory"); \ __sys_result = _result; \ } \ (int) __sys_result; }) \ ) #undef INTERNAL_SYSCALL_ERROR_P #define INTERNAL_SYSCALL_ERROR_P(val, err) \ ((unsigned int) (val) >= 0xfffff001u) #undef INTERNAL_SYSCALL_ERRNO #define INTERNAL_SYSCALL_ERRNO(val, err) (-(val)) #define PREP_ARGS_0() #define PREP_ARGS_1(a1) \ int _t1 = (int) (a1); \ PREP_ARGS_0 () #define PREP_ARGS_2(a1, a2) \ int _t2 = (int) (a2); \ PREP_ARGS_1 (a1) #define PREP_ARGS_3(a1, a2, a3) \ int _t3 = (int) (a3); \ PREP_ARGS_2 (a1, a2) #define PREP_ARGS_4(a1, a2, a3, a4) \ int _t4 = (int) (a4); \ PREP_ARGS_3 (a1, a2, a3) #define PREP_ARGS_5(a1, a2, a3, a4, a5) \ int _t5 = (int) (a5); \ PREP_ARGS_4 (a1, a2, a3, a4) #define PREP_ARGS_6(a1, a2, a3, a4, a5, a6) \ int _t6 = (int) (a6); \ PREP_ARGS_5 (a1, a2, a3, a4, a5) #define LOAD_ARGS_0 #define ASM_ARGS_0 #define LOAD_ARGS_1 \ register int _a1 __asm__ ("D1Ar1") = (int) (_t1); \ LOAD_ARGS_0 #define ASM_ARGS_1 ASM_ARGS_0, "d" (_a1) #define LOAD_ARGS_2 \ register int _a2 __asm__ ("D0Ar2") = (int) (_t2); \ LOAD_ARGS_1 #define ASM_ARGS_2 ASM_ARGS_1, "d" (_a2) #define LOAD_ARGS_3 \ register int _a3 __asm__ ("D1Ar3") = (int) (_t3); \ LOAD_ARGS_2 #define ASM_ARGS_3 ASM_ARGS_2, "d" (_a3) #define LOAD_ARGS_4 \ register int _a4 __asm__ ("D0Ar4") = (int) (_t4); \ LOAD_ARGS_3 #define ASM_ARGS_4 ASM_ARGS_3, "d" (_a4) #define LOAD_ARGS_5 \ register int _a5 __asm__ ("D1Ar5") = (int) (_t5); \ LOAD_ARGS_4 #define ASM_ARGS_5 ASM_ARGS_4, "d" (_a5) #define LOAD_ARGS_6 \ register int _a6 __asm__ ("D0Ar6") = (int) (_t6); \ LOAD_ARGS_5 #define ASM_ARGS_6 ASM_ARGS_5, "d" (_a6) #endif /* __ASSEMBLER__ */ #endif /* _BITS_SYSCALLS_H */ |