103 lines
2.1 KiB
C
103 lines
2.1 KiB
C
|
#ifndef __ASM_MICROBLAZE_SYSCALL_H
|
||
|
|
#define __ASM_MICROBLAZE_SYSCALL_H
|
||
|
|
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/sched.h>
|
||
|
|
#include <asm/ptrace.h>
|
||
|
|
|
||
|
|
/* The system call number is given by the user in R12 */
|
||
|
|
static inline long syscall_get_nr(struct task_struct *task,
|
||
|
|
struct pt_regs *regs)
|
||
|
|
{
|
||
|
|
return regs->r12;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void syscall_rollback(struct task_struct *task,
|
||
|
|
struct pt_regs *regs)
|
||
|
|
{
|
||
|
|
/* TODO. */
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline long syscall_get_error(struct task_struct *task,
|
||
|
|
struct pt_regs *regs)
|
||
|
|
{
|
||
|
|
return IS_ERR_VALUE(regs->r3) ? regs->r3 : 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline long syscall_get_return_value(struct task_struct *task,
|
||
|
|
struct pt_regs *regs)
|
||
|
|
{
|
||
|
|
return regs->r3;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void syscall_set_return_value(struct task_struct *task,
|
||
|
|
struct pt_regs *regs,
|
||
|
|
int error, long val)
|
||
|
|
{
|
||
|
|
if (error)
|
||
|
|
regs->r3 = -error;
|
||
|
|
else
|
||
|
|
regs->r3 = val;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline microblaze_reg_t microblaze_get_syscall_arg(struct pt_regs *regs,
|
||
|
|
unsigned int n)
|
||
|
|
{
|
||
|
|
switch (n) {
|
||
|
|
case 5: return regs->r10;
|
||
|
|
case 4: return regs->r9;
|
||
|
|
case 3: return regs->r8;
|
||
|
|
case 2: return regs->r7;
|
||
|
|
case 1: return regs->r6;
|
||
|
|
case 0: return regs->r5;
|
||
|
|
default:
|
||
|
|
BUG();
|
||
|
|
}
|
||
|
|
return ~0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void microblaze_set_syscall_arg(struct pt_regs *regs,
|
||
|
|
unsigned int n,
|
||
|
|
unsigned long val)
|
||
|
|
{
|
||
|
|
switch (n) {
|
||
|
|
case 5:
|
||
|
|
regs->r10 = val;
|
||
|
|
case 4:
|
||
|
|
regs->r9 = val;
|
||
|
|
case 3:
|
||
|
|
regs->r8 = val;
|
||
|
|
case 2:
|
||
|
|
regs->r7 = val;
|
||
|
|
case 1:
|
||
|
|
regs->r6 = val;
|
||
|
|
case 0:
|
||
|
|
regs->r5 = val;
|
||
|
|
default:
|
||
|
|
BUG();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void syscall_get_arguments(struct task_struct *task,
|
||
|
|
struct pt_regs *regs,
|
||
|
|
unsigned int i, unsigned int n,
|
||
|
|
unsigned long *args)
|
||
|
|
{
|
||
|
|
while (n--)
|
||
|
|
*args++ = microblaze_get_syscall_arg(regs, i++);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void syscall_set_arguments(struct task_struct *task,
|
||
|
|
struct pt_regs *regs,
|
||
|
|
unsigned int i, unsigned int n,
|
||
|
|
const unsigned long *args)
|
||
|
|
{
|
||
|
|
while (n--)
|
||
|
|
microblaze_set_syscall_arg(regs, i++, *args++);
|
||
|
|
}
|
||
|
|
|
||
|
|
asmlinkage long do_syscall_trace_enter(struct pt_regs *regs);
|
||
|
|
asmlinkage void do_syscall_trace_leave(struct pt_regs *regs);
|
||
|
|
|
||
|
|
#endif /* __ASM_MICROBLAZE_SYSCALL_H */
|