2 * Access to user system call parameters and results
4 * See asm-generic/syscall.h for function descriptions.
6 * Copyright (C) 2015 Mickaël Salaün <mic@digikod.net>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #ifndef __UM_SYSCALL_GENERIC_H
14 #define __UM_SYSCALL_GENERIC_H
16 #include <asm/ptrace.h>
17 #include <linux/err.h>
18 #include <linux/sched.h>
19 #include <sysdep/ptrace.h>
21 static inline int syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
24 return PT_REGS_SYSCALL_NR(regs);
27 static inline void syscall_rollback(struct task_struct *task,
33 static inline long syscall_get_error(struct task_struct *task,
36 const long error = regs_return_value(regs);
38 return IS_ERR_VALUE(error) ? error : 0;
41 static inline long syscall_get_return_value(struct task_struct *task,
44 return regs_return_value(regs);
47 static inline void syscall_set_return_value(struct task_struct *task,
51 PT_REGS_SET_SYSCALL_RETURN(regs, (long) error ?: val);
54 static inline void syscall_get_arguments(struct task_struct *task,
56 unsigned int i, unsigned int n,
59 const struct uml_pt_regs *r = ®s->regs;
65 *args++ = UPT_SYSCALL_ARG1(r);
69 *args++ = UPT_SYSCALL_ARG2(r);
73 *args++ = UPT_SYSCALL_ARG3(r);
77 *args++ = UPT_SYSCALL_ARG4(r);
81 *args++ = UPT_SYSCALL_ARG5(r);
85 *args++ = UPT_SYSCALL_ARG6(r);
95 static inline void syscall_set_arguments(struct task_struct *task,
97 unsigned int i, unsigned int n,
98 const unsigned long *args)
100 struct uml_pt_regs *r = ®s->regs;
106 UPT_SYSCALL_ARG1(r) = *args++;
110 UPT_SYSCALL_ARG2(r) = *args++;
114 UPT_SYSCALL_ARG3(r) = *args++;
118 UPT_SYSCALL_ARG4(r) = *args++;
122 UPT_SYSCALL_ARG5(r) = *args++;
126 UPT_SYSCALL_ARG6(r) = *args++;
136 /* See arch/x86/um/asm/syscall.h for syscall_get_arch() definition. */
138 #endif /* __UM_SYSCALL_GENERIC_H */