summaryrefslogtreecommitdiff
path: root/libc/sysdeps/linux/sh/bits/syscalls.h
blob: c69dce537f73a2e2d2e1cdb9e69d5be843b7abba (plain)
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
121
122
123
124
125
126
127
128
129
130
131
132
133
134
#ifndef _BITS_SYSCALLS_H
#define _BITS_SYSCALLS_H
#ifndef _SYSCALL_H
# error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead."
#endif

/* The Linux kernel uses different trap numbers on sh-2.  */
#if defined __sh2__ || defined __SH2A__
# define __SH_SYSCALL_TRAP_BASE 0x20
#else
# define __SH_SYSCALL_TRAP_BASE 0x10
#endif

#ifndef __ASSEMBLER__

#include <errno.h>

#define SYSCALL_INST_STR(x)	"trapa #"__stringify(__SH_SYSCALL_TRAP_BASE + x)"\n\t"
#define SYSCALL_INST_STR0	SYSCALL_INST_STR(0)
#define SYSCALL_INST_STR1	SYSCALL_INST_STR(1)
#define SYSCALL_INST_STR2	SYSCALL_INST_STR(2)
#define SYSCALL_INST_STR3	SYSCALL_INST_STR(3)
#define SYSCALL_INST_STR4	SYSCALL_INST_STR(4)
#define SYSCALL_INST_STR5	SYSCALL_INST_STR(5)
#define SYSCALL_INST_STR6	SYSCALL_INST_STR(6)

# ifdef NEED_SYSCALL_INST_PAD
#  define SYSCALL_INST_PAD "\
	or r0,r0; or r0,r0; or r0,r0; or r0,r0; or r0,r0"
# else
#  define SYSCALL_INST_PAD
# endif

#define ASMFMT_0
#define ASMFMT_1 \
	, "r" (r4)
#define ASMFMT_2 \
	, "r" (r4), "r" (r5)
#define ASMFMT_3 \
	, "r" (r4), "r" (r5), "r" (r6)
#define ASMFMT_4 \
	, "r" (r4), "r" (r5), "r" (r6), "r" (r7)
#define ASMFMT_5 \
	, "r" (r4), "r" (r5), "r" (r6), "r" (r7), "0" (r0)
#define ASMFMT_6 \
	, "r" (r4), "r" (r5), "r" (r6), "r" (r7), "0" (r0), "r" (r1)
#define ASMFMT_7 \
	, "r" (r4), "r" (r5), "r" (r6), "r" (r7), "0" (r0), "r" (r1), "r" (r2)

#define SUBSTITUTE_ARGS_0()
#define SUBSTITUTE_ARGS_1(arg1) \
	long int _arg1 = (long int) (arg1);				      \
	register long int r4 __asm__ ("%r4") = (long int) (_arg1)
#define SUBSTITUTE_ARGS_2(arg1, arg2) \
	long int _arg1 = (long int) (arg1);				      \
	long int _arg2 = (long int) (arg2);				      \
	register long int r4 __asm__ ("%r4") = (long int) (_arg1);		      \
	register long int r5 __asm__ ("%r5") = (long int) (_arg2)
#define SUBSTITUTE_ARGS_3(arg1, arg2, arg3) \
	long int _arg1 = (long int) (arg1);				      \
	long int _arg2 = (long int) (arg2);				      \
	long int _arg3 = (long int) (arg3);				      \
	register long int r4 __asm__ ("%r4") = (long int) (_arg1);		      \
	register long int r5 __asm__ ("%r5") = (long int) (_arg2);		      \
	register long int r6 __asm__ ("%r6") = (long int) (_arg3)
#define SUBSTITUTE_ARGS_4(arg1, arg2, arg3, arg4) \
	long int _arg1 = (long int) (arg1);				      \
	long int _arg2 = (long int) (arg2);				      \
	long int _arg3 = (long int) (arg3);				      \
	long int _arg4 = (long int) (arg4);				      \
	register long int r4 __asm__ ("%r4") = (long int) (_arg1);		      \
	register long int r5 __asm__ ("%r5") = (long int) (_arg2);		      \
	register long int r6 __asm__ ("%r6") = (long int) (_arg3);		      \
	register long int r7 __asm__ ("%r7") = (long int) (_arg4)
#define SUBSTITUTE_ARGS_5(arg1, arg2, arg3, arg4, arg5) \
	long int _arg1 = (long int) (arg1);				      \
	long int _arg2 = (long int) (arg2);				      \
	long int _arg3 = (long int) (arg3);				      \
	long int _arg4 = (long int) (arg4);				      \
	long int _arg5 = (long int) (arg5);				      \
	register long int r4 __asm__ ("%r4") = (long int) (_arg1);		      \
	register long int r5 __asm__ ("%r5") = (long int) (_arg2);		      \
	register long int r6 __asm__ ("%r6") = (long int) (_arg3);		      \
	register long int r7 __asm__ ("%r7") = (long int) (_arg4);		      \
	register long int r0 __asm__ ("%r0") = (long int) (_arg5)
#define SUBSTITUTE_ARGS_6(arg1, arg2, arg3, arg4, arg5, arg6) \
	long int _arg1 = (long int) (arg1);				      \
	long int _arg2 = (long int) (arg2);				      \
	long int _arg3 = (long int) (arg3);				      \
	long int _arg4 = (long int) (arg4);				      \
	long int _arg5 = (long int) (arg5);				      \
	long int _arg6 = (long int) (arg6);				      \
	register long int r4 __asm__ ("%r4") = (long int)(_arg1);		      \
	register long int r5 __asm__ ("%r5") = (long int) (_arg2);		      \
	register long int r6 __asm__ ("%r6") = (long int) (_arg3);		      \
	register long int r7 __asm__ ("%r7") = (long int) (_arg4);		      \
	register long int r0 __asm__ ("%r0") = (long int) (_arg5);		      \
	register long int r1 __asm__ ("%r1") = (long int) (_arg6)
#define SUBSTITUTE_ARGS_7(arg1, arg2, arg3, arg4, arg5, arg6, arg7) \
	long int _arg1 = (long int) (arg1);				      \
	long int _arg2 = (long int) (arg2);				      \
	long int _arg3 = (long int) (arg3);				      \
	long int _arg4 = (long int) (arg4);				      \
	long int _arg5 = (long int) (arg5);				      \
	long int _arg6 = (long int) (arg6);				      \
	long int _arg7 = (long int) (arg7);				      \
	register long int r4 __asm__ ("%r4") = (long int) (_arg1);		      \
	register long int r5 __asm__ ("%r5") = (long int) (_arg2);		      \
	register long int r6 __asm__ ("%r6") = (long int) (_arg3);		      \
	register long int r7 __asm__ ("%r7") = (long int) (_arg4);		      \
	register long int r0 __asm__ ("%r0") = (long int) (_arg5);		      \
	register long int r1 __asm__ ("%r1") = (long int) (_arg6);		      \
	register long int r2 __asm__ ("%r2") = (long int) (_arg7)

/* The _NCS variant allows non-constant syscall numbers.  */
#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
  ({									      \
    unsigned long int resultvar;					      \
    register long int r3 __asm__ ("%r3") = (name);			 	      \
    SUBSTITUTE_ARGS_##nr(args);						      \
									      \
    __asm__ volatile (SYSCALL_INST_STR##nr SYSCALL_INST_PAD			      \
		  : "=z" (resultvar)					      \
		  : "r" (r3) ASMFMT_##nr				      \
		  : "memory");						      \
									      \
    (int) resultvar; })

#define INTERNAL_SYSCALL_ERROR_P(val, err) \
  ((unsigned int) (val) >= 0xfffff001u)

#endif /* __ASSEMBLER__ */
#endif /* _BITS_SYSCALLS_H */