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1 | #ifndef __ASM_SH_SYSCALL_32_H |
2 | #define __ASM_SH_SYSCALL_32_H | |
3 | ||
37d181bb | 4 | #include <uapi/linux/audit.h> |
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5 | #include <linux/kernel.h> |
6 | #include <linux/sched.h> | |
34e19ada | 7 | #include <linux/err.h> |
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8 | #include <asm/ptrace.h> |
9 | ||
f15b2dc0 | 10 | /* The system call number is given by the user in R3 */ |
fb4f87a2 PM |
11 | static inline long syscall_get_nr(struct task_struct *task, |
12 | struct pt_regs *regs) | |
13 | { | |
14 | return (regs->tra >= 0) ? regs->regs[3] : -1L; | |
15 | } | |
16 | ||
17 | static inline void syscall_rollback(struct task_struct *task, | |
18 | struct pt_regs *regs) | |
19 | { | |
20 | /* | |
21 | * XXX: This needs some thought. On SH we don't | |
22 | * save away the original r0 value anywhere. | |
23 | */ | |
24 | } | |
25 | ||
fb4f87a2 PM |
26 | static inline long syscall_get_error(struct task_struct *task, |
27 | struct pt_regs *regs) | |
28 | { | |
03f07876 | 29 | return IS_ERR_VALUE(regs->regs[0]) ? regs->regs[0] : 0; |
fb4f87a2 PM |
30 | } |
31 | ||
32 | static inline long syscall_get_return_value(struct task_struct *task, | |
33 | struct pt_regs *regs) | |
34 | { | |
35 | return regs->regs[0]; | |
36 | } | |
37 | ||
38 | static inline void syscall_set_return_value(struct task_struct *task, | |
39 | struct pt_regs *regs, | |
40 | int error, long val) | |
41 | { | |
03f07876 | 42 | if (error) |
fb4f87a2 | 43 | regs->regs[0] = -error; |
03f07876 | 44 | else |
fb4f87a2 | 45 | regs->regs[0] = val; |
fb4f87a2 PM |
46 | } |
47 | ||
48 | static inline void syscall_get_arguments(struct task_struct *task, | |
49 | struct pt_regs *regs, | |
50 | unsigned int i, unsigned int n, | |
51 | unsigned long *args) | |
52 | { | |
53 | /* | |
54 | * Do this simply for now. If we need to start supporting | |
55 | * fetching arguments from arbitrary indices, this will need some | |
56 | * extra logic. Presently there are no in-tree users that depend | |
57 | * on this behaviour. | |
58 | */ | |
59 | BUG_ON(i); | |
60 | ||
61 | /* Argument pattern is: R4, R5, R6, R7, R0, R1 */ | |
62 | switch (n) { | |
63 | case 6: args[5] = regs->regs[1]; | |
64 | case 5: args[4] = regs->regs[0]; | |
65 | case 4: args[3] = regs->regs[7]; | |
66 | case 3: args[2] = regs->regs[6]; | |
67 | case 2: args[1] = regs->regs[5]; | |
68 | case 1: args[0] = regs->regs[4]; | |
c652d780 | 69 | case 0: |
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70 | break; |
71 | default: | |
72 | BUG(); | |
73 | } | |
74 | } | |
75 | ||
76 | static inline void syscall_set_arguments(struct task_struct *task, | |
77 | struct pt_regs *regs, | |
78 | unsigned int i, unsigned int n, | |
79 | const unsigned long *args) | |
80 | { | |
81 | /* Same note as above applies */ | |
82 | BUG_ON(i); | |
83 | ||
84 | switch (n) { | |
85 | case 6: regs->regs[1] = args[5]; | |
86 | case 5: regs->regs[0] = args[4]; | |
87 | case 4: regs->regs[7] = args[3]; | |
88 | case 3: regs->regs[6] = args[2]; | |
89 | case 2: regs->regs[5] = args[1]; | |
90 | case 1: regs->regs[4] = args[0]; | |
91 | break; | |
92 | default: | |
93 | BUG(); | |
94 | } | |
95 | } | |
96 | ||
37d181bb EP |
97 | static inline int syscall_get_arch(void) |
98 | { | |
99 | int arch = AUDIT_ARCH_SH; | |
100 | ||
101 | #ifdef CONFIG_CPU_LITTLE_ENDIAN | |
102 | arch |= __AUDIT_ARCH_LE; | |
103 | #endif | |
104 | return arch; | |
105 | } | |
fb4f87a2 | 106 | #endif /* __ASM_SH_SYSCALL_32_H */ |