| 1 |
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| 2 | #ifndef __ASM_MICROBLAZE_SYSCALL_H
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| 3 | #define __ASM_MICROBLAZE_SYSCALL_H
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| 4 |
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| 5 | #include <uapi/linux/audit.h>
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| 6 | #include <linux/kernel.h>
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| 7 | #include <linux/sched.h>
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| 8 | #include <asm/ptrace.h>
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| 9 |
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| 10 |
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| 11 | static inline long syscall_get_nr(struct task_struct *task,
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| 12 | struct pt_regs *regs)
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| 13 | {
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| 14 | return regs->r12;
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| 15 | }
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| 16 |
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| 17 | static inline void syscall_set_nr(struct task_struct *task,
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| 18 | struct pt_regs *regs,
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| 19 | int nr)
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| 20 | {
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| 21 | regs->r12 = nr;
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| 22 | }
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| 23 |
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| 24 | static inline void syscall_rollback(struct task_struct *task,
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| 25 | struct pt_regs *regs)
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| 26 | {
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| 27 |
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| 28 | }
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| 29 |
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| 30 | static inline long syscall_get_error(struct task_struct *task,
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| 31 | struct pt_regs *regs)
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| 32 | {
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| 33 | return IS_ERR_VALUE(regs->r3) ? regs->r3 : 0;
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| 34 | }
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| 35 |
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| 36 | static inline long syscall_get_return_value(struct task_struct *task,
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| 37 | struct pt_regs *regs)
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| 38 | {
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| 39 | return regs->r3;
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| 40 | }
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| 41 |
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| 42 | static inline void syscall_set_return_value(struct task_struct *task,
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| 43 | struct pt_regs *regs,
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| 44 | int error, long val)
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| 45 | {
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| 46 | if (error)
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| 47 | regs->r3 = -error;
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| 48 | else
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| 49 | regs->r3 = val;
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| 50 | }
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| 51 |
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| 52 | static inline microblaze_reg_t microblaze_get_syscall_arg(struct pt_regs *regs,
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| 53 | unsigned int n)
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| 54 | {
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| 55 | switch (n) {
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| 56 | case 5: return regs->r10;
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| 57 | case 4: return regs->r9;
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| 58 | case 3: return regs->r8;
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| 59 | case 2: return regs->r7;
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| 60 | case 1: return regs->r6;
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| 61 | case 0: return regs->r5;
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| 62 | default:
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| 63 | BUG();
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| 64 | }
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| 65 | return ~0;
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| 66 | }
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| 67 |
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| 68 | static inline void syscall_get_arguments(struct task_struct *task,
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| 69 | struct pt_regs *regs,
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| 70 | unsigned long *args)
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| 71 | {
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| 72 | unsigned int i = 0;
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| 73 | unsigned int n = 6;
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| 74 |
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| 75 | while (n--)
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| 76 | *args++ = microblaze_get_syscall_arg(regs, i++);
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| 77 | }
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| 78 |
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| 79 | asmlinkage unsigned long do_syscall_trace_enter(struct pt_regs *regs);
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| 80 | asmlinkage void do_syscall_trace_leave(struct pt_regs *regs);
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| 81 |
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| 82 | static inline int syscall_get_arch(struct task_struct *task)
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| 83 | {
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| 84 | return AUDIT_ARCH_MICROBLAZE;
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| 85 | }
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| 86 | #endif
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