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 #ifdef __ASSEMBLER__
8 
9 #undef DO_CALL
10 #define DO_CALL(syscall_name, args) \
11     DOARGS_##args                   \
12     movi r2, SYS_ify(syscall_name);  \
13     trap;
14 
15 #define DOARGS_0 /* nothing */
16 #define DOARGS_1 /* nothing */
17 #define DOARGS_2 /* nothing */
18 #define DOARGS_3 /* nothing */
19 #define DOARGS_4 /* nothing */
20 #define DOARGS_5 ldw r8, 0(sp);
21 #define DOARGS_6 ldw r9, 4(sp); ldw r8, 0(sp);
22 
23 #else
24 
25 #include <errno.h>
26 
27 #undef INTERNAL_SYSCALL_DECL
28 #define INTERNAL_SYSCALL_DECL(err) unsigned int err __attribute__((unused))
29 
30 #undef INTERNAL_SYSCALL_ERROR_P
31 #define INTERNAL_SYSCALL_ERROR_P(val, err) ((void) (val), (unsigned int) (err))
32 
33 #undef INTERNAL_SYSCALL_ERRNO
34 #define INTERNAL_SYSCALL_ERRNO(val, err)   ((void) (err), val)
35 
36 #undef INTERNAL_SYSCALL_NCS
37 #define INTERNAL_SYSCALL_NCS(name, err, nr, args...)            \
38   ({ unsigned int _sys_result;                                  \
39      {                                                          \
40        LOAD_ARGS_##nr (args)					\
41        LOAD_REGS_##nr						\
42        register int _r2 __asm__ ("r2") = (int)(name);           \
43        register int _sys_err __asm__ ("r7");                        \
44        __asm__ volatile ("trap"                                 \
45                      : "+r" (_r2), "=r" (_sys_err)              \
46                      : ASM_ARGS_##nr				\
47                      : "memory");                               \
48        _sys_result = _r2;                                       \
49        err = _sys_err;						\
50      }                                                          \
51      (int) _sys_result; })
52 
53 #define LOAD_ARGS_0()
54 #define LOAD_REGS_0
55 #define ASM_ARGS_0
56 #define LOAD_ARGS_1(a1)				\
57   LOAD_ARGS_0 ()				\
58   int __arg1 = (int) (a1);
59 #define LOAD_REGS_1				\
60   register int _r4 __asm__ ("r4") = __arg1;	\
61   LOAD_REGS_0
62 #define ASM_ARGS_1                  "r" (_r4)
63 #define LOAD_ARGS_2(a1, a2)			\
64   LOAD_ARGS_1 (a1)				\
65   int __arg2 = (int) (a2);
66 #define LOAD_REGS_2				\
67   register int _r5 __asm__ ("r5") = __arg2;	\
68   LOAD_REGS_1
69 #define ASM_ARGS_2      ASM_ARGS_1, "r" (_r5)
70 #define LOAD_ARGS_3(a1, a2, a3)			\
71   LOAD_ARGS_2 (a1, a2)				\
72   int __arg3 = (int) (a3);
73 #define LOAD_REGS_3				\
74   register int _r6 __asm__ ("r6") = __arg3;	\
75   LOAD_REGS_2
76 #define ASM_ARGS_3      ASM_ARGS_2, "r" (_r6)
77 #define LOAD_ARGS_4(a1, a2, a3, a4)		\
78   LOAD_ARGS_3 (a1, a2, a3)			\
79   int __arg4 = (int) (a4);
80 #define LOAD_REGS_4				\
81   register int _r7 __asm__ ("r7") = __arg4;	\
82   LOAD_REGS_3
83 #define ASM_ARGS_4      ASM_ARGS_3, "r" (_r7)
84 #define LOAD_ARGS_5(a1, a2, a3, a4, a5)		\
85   LOAD_ARGS_4 (a1, a2, a3, a4)			\
86   int __arg5 = (int) (a5);
87 #define LOAD_REGS_5				\
88   register int _r8 __asm__ ("r8") = __arg5;	\
89   LOAD_REGS_4
90 #define ASM_ARGS_5      ASM_ARGS_4, "r" (_r8)
91 #define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6)	\
92   LOAD_ARGS_5 (a1, a2, a3, a4, a5)		\
93   int __arg6 = (int) (a6);
94 #define LOAD_REGS_6			    \
95   register int _r9 __asm__ ("r9") = __arg6;     \
96   LOAD_REGS_5
97 #define ASM_ARGS_6      ASM_ARGS_5, "r" (_r9)
98 
99 #endif /* __ASSEMBLER__ */
100 #endif /* _BITS_SYSCALLS_H */
101