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 (1351B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2
      3#ifndef __ASM_SYSCALL_H
      4#define __ASM_SYSCALL_H
      5
      6#include <linux/sched.h>
      7#include <linux/err.h>
      8#include <abi/regdef.h>
      9#include <uapi/linux/audit.h>
     10
     11extern void *sys_call_table[];
     12
     13static inline int
     14syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
     15{
     16	return regs_syscallid(regs);
     17}
     18
     19static inline void
     20syscall_set_nr(struct task_struct *task, struct pt_regs *regs,
     21	       int sysno)
     22{
     23	regs_syscallid(regs) = sysno;
     24}
     25
     26static inline void
     27syscall_rollback(struct task_struct *task, struct pt_regs *regs)
     28{
     29	regs->a0 = regs->orig_a0;
     30}
     31
     32static inline long
     33syscall_get_error(struct task_struct *task, struct pt_regs *regs)
     34{
     35	unsigned long error = regs->a0;
     36
     37	return IS_ERR_VALUE(error) ? error : 0;
     38}
     39
     40static inline long
     41syscall_get_return_value(struct task_struct *task, struct pt_regs *regs)
     42{
     43	return regs->a0;
     44}
     45
     46static inline void
     47syscall_set_return_value(struct task_struct *task, struct pt_regs *regs,
     48		int error, long val)
     49{
     50	regs->a0 = (long) error ?: val;
     51}
     52
     53static inline void
     54syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
     55		      unsigned long *args)
     56{
     57	args[0] = regs->orig_a0;
     58	args++;
     59	memcpy(args, &regs->a1, 5 * sizeof(args[0]));
     60}
     61
     62static inline int
     63syscall_get_arch(struct task_struct *task)
     64{
     65	return AUDIT_ARCH_CSKY;
     66}
     67
     68#endif	/* __ASM_SYSCALL_H */