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 __ASM_SPARC_SYSCALL_H
#define __ASM_SPARC_SYSCALL_H
#include <uapi/linux/audit.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <asm/ptrace.h>
#include <asm/thread_info.h>
/*
* The syscall table always contains 32 bit pointers since we know that the
* address of the function to be called is (way) below 4GB. So the "int"
* type here is what we want [need] for both 32 bit and 64 bit systems.
*/
extern const unsigned int sys_call_table[];
/* The system call number is given by the user in %g1 */
static inline long syscall_get_nr(struct task_struct *task,
struct pt_regs *regs)
{
int syscall_p = pt_regs_is_syscall(regs);
return (syscall_p ? regs->u_regs[UREG_G1] : -1L);
}
static inline void syscall_rollback(struct task_struct *task,
struct pt_regs *regs)
{
/* XXX This needs some thought. On Sparc we don't
* XXX save away the original %o0 value somewhere.
* XXX Instead we hold it in register %l5 at the top
* XXX level trap frame and pass this down to the signal
* XXX dispatch code which is the only place that value
* XXX ever was needed.
*/
}
#ifdef CONFIG_SPARC32
static inline bool syscall_has_error(struct pt_regs *regs)
{
return (regs->psr & PSR_C) ? true : false;
}
static inline void syscall_set_error(struct pt_regs *regs)
{
regs->psr |= PSR_C;
}
static inline void syscall_clear_error(struct pt_regs *regs)
{
regs->psr &= ~PSR_C;
}
#else
static inline bool syscall_has_error(struct pt_regs *regs)
{
return (regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY)) ? true : false;
}
static inline void syscall_set_error(struct pt_regs *regs)
{
regs->tstate |= (TSTATE_XCARRY | TSTATE_ICARRY);
}
static inline void syscall_clear_error(struct pt_regs *regs)
{
regs->tstate &= ~(TSTATE_XCARRY | TSTATE_ICARRY);
}
#endif
static inline long syscall_get_error(struct task_struct *task,
struct pt_regs *regs)
{
long val = regs->u_regs[UREG_I0];
return (syscall_has_error(regs) ? -val : 0);
}
static inline long syscall_get_return_value(struct task_struct *task,
struct pt_regs *regs)
{
long val = regs->u_regs[UREG_I0];
return val;
}
static inline void syscall_set_return_value(struct task_struct *task,
struct pt_regs *regs,
int error, long val)
{
if (error) {
syscall_set_error(regs);
regs->u_regs[UREG_I0] = -error;
} else {
syscall_clear_error(regs);
regs->u_regs[UREG_I0] = val;
}
}
static inline void syscall_get_arguments(struct task_struct *task,
struct pt_regs *regs,
unsigned int i, unsigned int n,
unsigned long *args)
{
int zero_extend = 0;
unsigned int j;
#ifdef CONFIG_SPARC64
if (test_tsk_thread_flag(task, TIF_32BIT))
zero_extend = 1;
#endif
for (j = 0; j < n; j++) {
unsigned long val = regs->u_regs[UREG_I0 + i + j];
if (zero_extend)
args[j] = (u32) val;
else
args[j] = val;
}
}
static inline void syscall_set_arguments(struct task_struct *task,
struct pt_regs *regs,
unsigned int i, unsigned int n,
const unsigned long *args)
{
unsigned int j;
for (j = 0; j < n; j++)
regs->u_regs[UREG_I0 + i + j] = args[j];
}
static inline int syscall_get_arch(void)
{
return is_32bit_task() ? AUDIT_ARCH_SPARC : AUDIT_ARCH_SPARC64;
}
#endif /* __ASM_SPARC_SYSCALL_H */
|
