cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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syscall.h (1778B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef __ASM_MICROBLAZE_SYSCALL_H
      3#define __ASM_MICROBLAZE_SYSCALL_H
      4
      5#include <uapi/linux/audit.h>
      6#include <linux/kernel.h>
      7#include <linux/sched.h>
      8#include <asm/ptrace.h>
      9
     10/* The system call number is given by the user in R12 */
     11static inline long syscall_get_nr(struct task_struct *task,
     12				  struct pt_regs *regs)
     13{
     14	return regs->r12;
     15}
     16
     17static inline void syscall_rollback(struct task_struct *task,
     18				    struct pt_regs *regs)
     19{
     20	/* TODO.  */
     21}
     22
     23static inline long syscall_get_error(struct task_struct *task,
     24				     struct pt_regs *regs)
     25{
     26	return IS_ERR_VALUE(regs->r3) ? regs->r3 : 0;
     27}
     28
     29static inline long syscall_get_return_value(struct task_struct *task,
     30					    struct pt_regs *regs)
     31{
     32	return regs->r3;
     33}
     34
     35static inline void syscall_set_return_value(struct task_struct *task,
     36					    struct pt_regs *regs,
     37					    int error, long val)
     38{
     39	if (error)
     40		regs->r3 = -error;
     41	else
     42		regs->r3 = val;
     43}
     44
     45static inline microblaze_reg_t microblaze_get_syscall_arg(struct pt_regs *regs,
     46							  unsigned int n)
     47{
     48	switch (n) {
     49	case 5: return regs->r10;
     50	case 4: return regs->r9;
     51	case 3: return regs->r8;
     52	case 2: return regs->r7;
     53	case 1: return regs->r6;
     54	case 0: return regs->r5;
     55	default:
     56		BUG();
     57	}
     58	return ~0;
     59}
     60
     61static inline void syscall_get_arguments(struct task_struct *task,
     62					 struct pt_regs *regs,
     63					 unsigned long *args)
     64{
     65	unsigned int i = 0;
     66	unsigned int n = 6;
     67
     68	while (n--)
     69		*args++ = microblaze_get_syscall_arg(regs, i++);
     70}
     71
     72asmlinkage unsigned long do_syscall_trace_enter(struct pt_regs *regs);
     73asmlinkage void do_syscall_trace_leave(struct pt_regs *regs);
     74
     75static inline int syscall_get_arch(struct task_struct *task)
     76{
     77	return AUDIT_ARCH_MICROBLAZE;
     78}
     79#endif /* __ASM_MICROBLAZE_SYSCALL_H */