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))
8 /* Avoid use of r7 in asm constraints when producing thumb code,
9 * since it's reserved as frame pointer and might not be supported. */
11 #define __asm_syscall(...) do { \
12 __asm__ __volatile__ ( "mov %1,r7 ; mov r7,%2 ; svc 0 ; mov r7,%1" \
13 : "=r"(r0), "=&r"((int){0}) : __VA_ARGS__ : "memory"); \
19 #define __ASM____R7__ __asm__("r7")
20 #define __asm_syscall(...) do { \
21 __asm__ __volatile__ ( "svc 0" \
22 : "=r"(r0) : __VA_ARGS__ : "memory"); \
27 /* For thumb2, we can allow 8-bit immediate syscall numbers, saving a
28 * register in the above dance around r7. Does not work for thumb1 where
29 * only movs, not mov, supports immediates, and we can't use movs because
30 * it doesn't support high regs. */
32 #define R7_OPERAND "rI"(r7)
34 #define R7_OPERAND "r"(r7)
37 static inline long __syscall0(long n
)
39 register long r7 __ASM____R7__
= n
;
40 register long r0
__asm__("r0");
41 __asm_syscall(R7_OPERAND
);
44 static inline long __syscall1(long n
, long a
)
46 register long r7 __ASM____R7__
= n
;
47 register long r0
__asm__("r0") = a
;
48 __asm_syscall(R7_OPERAND
, "0"(r0
));
51 static inline long __syscall2(long n
, long a
, long b
)
53 register long r7 __ASM____R7__
= n
;
54 register long r0
__asm__("r0") = a
;
55 register long r1
__asm__("r1") = b
;
56 __asm_syscall(R7_OPERAND
, "0"(r0
), "r"(r1
));
59 static inline long __syscall3(long n
, long a
, long b
, long c
)
61 register long r7 __ASM____R7__
= n
;
62 register long r0
__asm__("r0") = a
;
63 register long r1
__asm__("r1") = b
;
64 register long r2
__asm__("r2") = c
;
65 __asm_syscall(R7_OPERAND
, "0"(r0
), "r"(r1
), "r"(r2
));
68 static inline long __syscall4(long n
, long a
, long b
, long c
, long d
)
70 register long r7 __ASM____R7__
= n
;
71 register long r0
__asm__("r0") = a
;
72 register long r1
__asm__("r1") = b
;
73 register long r2
__asm__("r2") = c
;
74 register long r3
__asm__("r3") = d
;
75 __asm_syscall(R7_OPERAND
, "0"(r0
), "r"(r1
), "r"(r2
), "r"(r3
));
78 static inline long __syscall5(long n
, long a
, long b
, long c
, long d
, long e
)
80 register long r7 __ASM____R7__
= n
;
81 register long r0
__asm__("r0") = a
;
82 register long r1
__asm__("r1") = b
;
83 register long r2
__asm__("r2") = c
;
84 register long r3
__asm__("r3") = d
;
85 register long r4
__asm__("r4") = e
;
86 __asm_syscall(R7_OPERAND
, "0"(r0
), "r"(r1
), "r"(r2
), "r"(r3
), "r"(r4
));
89 static inline long __syscall6(long n
, long a
, long b
, long c
, long d
, long e
, long f
)
91 register long r7 __ASM____R7__
= n
;
92 register long r0
__asm__("r0") = a
;
93 register long r1
__asm__("r1") = b
;
94 register long r2
__asm__("r2") = c
;
95 register long r3
__asm__("r3") = d
;
96 register long r4
__asm__("r4") = e
;
97 register long r5
__asm__("r5") = f
;
98 __asm_syscall(R7_OPERAND
, "0"(r0
), "r"(r1
), "r"(r2
), "r"(r3
), "r"(r4
), "r"(r5
));
101 #define SYSCALL_FADVISE_6_ARG
103 #define SYSCALL_IPC_BROKEN_MODE