1 #ifndef __ASM_SPARC_SYSCALL_H
2 #define __ASM_SPARC_SYSCALL_H
3
4 #include <uapi/linux/audit.h>
5 #include <linux/kernel.h>
6 #include <linux/sched.h>
7 #include <asm/ptrace.h>
8 #include <asm/thread_info.h>
9
10 /*
11 * The syscall table always contains 32 bit pointers since we know that the
12 * address of the function to be called is (way) below 4GB. So the "int"
13 * type here is what we want [need] for both 32 bit and 64 bit systems.
14 */
15 extern const unsigned int sys_call_table[];
16
17 /* The system call number is given by the user in %g1 */
syscall_get_nr(struct task_struct * task,struct pt_regs * regs)18 static inline long syscall_get_nr(struct task_struct *task,
19 struct pt_regs *regs)
20 {
21 int syscall_p = pt_regs_is_syscall(regs);
22
23 return (syscall_p ? regs->u_regs[UREG_G1] : -1L);
24 }
25
syscall_rollback(struct task_struct * task,struct pt_regs * regs)26 static inline void syscall_rollback(struct task_struct *task,
27 struct pt_regs *regs)
28 {
29 /* XXX This needs some thought. On Sparc we don't
30 * XXX save away the original %o0 value somewhere.
31 * XXX Instead we hold it in register %l5 at the top
32 * XXX level trap frame and pass this down to the signal
33 * XXX dispatch code which is the only place that value
34 * XXX ever was needed.
35 */
36 }
37
38 #ifdef CONFIG_SPARC32
syscall_has_error(struct pt_regs * regs)39 static inline bool syscall_has_error(struct pt_regs *regs)
40 {
41 return (regs->psr & PSR_C) ? true : false;
42 }
syscall_set_error(struct pt_regs * regs)43 static inline void syscall_set_error(struct pt_regs *regs)
44 {
45 regs->psr |= PSR_C;
46 }
syscall_clear_error(struct pt_regs * regs)47 static inline void syscall_clear_error(struct pt_regs *regs)
48 {
49 regs->psr &= ~PSR_C;
50 }
51 #else
syscall_has_error(struct pt_regs * regs)52 static inline bool syscall_has_error(struct pt_regs *regs)
53 {
54 return (regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY)) ? true : false;
55 }
syscall_set_error(struct pt_regs * regs)56 static inline void syscall_set_error(struct pt_regs *regs)
57 {
58 regs->tstate |= (TSTATE_XCARRY | TSTATE_ICARRY);
59 }
syscall_clear_error(struct pt_regs * regs)60 static inline void syscall_clear_error(struct pt_regs *regs)
61 {
62 regs->tstate &= ~(TSTATE_XCARRY | TSTATE_ICARRY);
63 }
64 #endif
65
syscall_get_error(struct task_struct * task,struct pt_regs * regs)66 static inline long syscall_get_error(struct task_struct *task,
67 struct pt_regs *regs)
68 {
69 long val = regs->u_regs[UREG_I0];
70
71 return (syscall_has_error(regs) ? -val : 0);
72 }
73
syscall_get_return_value(struct task_struct * task,struct pt_regs * regs)74 static inline long syscall_get_return_value(struct task_struct *task,
75 struct pt_regs *regs)
76 {
77 long val = regs->u_regs[UREG_I0];
78
79 return val;
80 }
81
syscall_set_return_value(struct task_struct * task,struct pt_regs * regs,int error,long val)82 static inline void syscall_set_return_value(struct task_struct *task,
83 struct pt_regs *regs,
84 int error, long val)
85 {
86 if (error) {
87 syscall_set_error(regs);
88 regs->u_regs[UREG_I0] = -error;
89 } else {
90 syscall_clear_error(regs);
91 regs->u_regs[UREG_I0] = val;
92 }
93 }
94
syscall_get_arguments(struct task_struct * task,struct pt_regs * regs,unsigned int i,unsigned int n,unsigned long * args)95 static inline void syscall_get_arguments(struct task_struct *task,
96 struct pt_regs *regs,
97 unsigned int i, unsigned int n,
98 unsigned long *args)
99 {
100 int zero_extend = 0;
101 unsigned int j;
102
103 #ifdef CONFIG_SPARC64
104 if (test_tsk_thread_flag(task, TIF_32BIT))
105 zero_extend = 1;
106 #endif
107
108 for (j = 0; j < n; j++) {
109 unsigned long val = regs->u_regs[UREG_I0 + i + j];
110
111 if (zero_extend)
112 args[j] = (u32) val;
113 else
114 args[j] = val;
115 }
116 }
117
syscall_set_arguments(struct task_struct * task,struct pt_regs * regs,unsigned int i,unsigned int n,const unsigned long * args)118 static inline void syscall_set_arguments(struct task_struct *task,
119 struct pt_regs *regs,
120 unsigned int i, unsigned int n,
121 const unsigned long *args)
122 {
123 unsigned int j;
124
125 for (j = 0; j < n; j++)
126 regs->u_regs[UREG_I0 + i + j] = args[j];
127 }
128
syscall_get_arch(void)129 static inline int syscall_get_arch(void)
130 {
131 return is_32bit_task() ? AUDIT_ARCH_SPARC : AUDIT_ARCH_SPARC64;
132 }
133
134 #endif /* __ASM_SPARC_SYSCALL_H */
135