1 #ifndef __ASM_MICROBLAZE_SYSCALL_H 2 #define __ASM_MICROBLAZE_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 9 /* The system call number is given by the user in R12 */ 10 static inline long syscall_get_nr(struct task_struct *task, 11 struct pt_regs *regs) 12 { 13 return regs->r12; 14 } 15 16 static inline void syscall_rollback(struct task_struct *task, 17 struct pt_regs *regs) 18 { 19 /* TODO. */ 20 } 21 22 static inline long syscall_get_error(struct task_struct *task, 23 struct pt_regs *regs) 24 { 25 return IS_ERR_VALUE(regs->r3) ? regs->r3 : 0; 26 } 27 28 static inline long syscall_get_return_value(struct task_struct *task, 29 struct pt_regs *regs) 30 { 31 return regs->r3; 32 } 33 34 static inline void syscall_set_return_value(struct task_struct *task, 35 struct pt_regs *regs, 36 int error, long val) 37 { 38 if (error) 39 regs->r3 = -error; 40 else 41 regs->r3 = val; 42 } 43 44 static inline microblaze_reg_t microblaze_get_syscall_arg(struct pt_regs *regs, 45 unsigned int n) 46 { 47 switch (n) { 48 case 5: return regs->r10; 49 case 4: return regs->r9; 50 case 3: return regs->r8; 51 case 2: return regs->r7; 52 case 1: return regs->r6; 53 case 0: return regs->r5; 54 default: 55 BUG(); 56 } 57 return ~0; 58 } 59 60 static inline void microblaze_set_syscall_arg(struct pt_regs *regs, 61 unsigned int n, 62 unsigned long val) 63 { 64 switch (n) { 65 case 5: 66 regs->r10 = val; 67 case 4: 68 regs->r9 = val; 69 case 3: 70 regs->r8 = val; 71 case 2: 72 regs->r7 = val; 73 case 1: 74 regs->r6 = val; 75 case 0: 76 regs->r5 = val; 77 default: 78 BUG(); 79 } 80 } 81 82 static inline void syscall_get_arguments(struct task_struct *task, 83 struct pt_regs *regs, 84 unsigned int i, unsigned int n, 85 unsigned long *args) 86 { 87 while (n--) 88 *args++ = microblaze_get_syscall_arg(regs, i++); 89 } 90 91 static inline void syscall_set_arguments(struct task_struct *task, 92 struct pt_regs *regs, 93 unsigned int i, unsigned int n, 94 const unsigned long *args) 95 { 96 while (n--) 97 microblaze_set_syscall_arg(regs, i++, *args++); 98 } 99 100 asmlinkage unsigned long do_syscall_trace_enter(struct pt_regs *regs); 101 asmlinkage void do_syscall_trace_leave(struct pt_regs *regs); 102 103 static inline int syscall_get_arch(void) 104 { 105 return AUDIT_ARCH_MICROBLAZE; 106 } 107 #endif /* __ASM_MICROBLAZE_SYSCALL_H */ 108