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81 lines
1.9 KiB
81 lines
1.9 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Access to user system call parameters and results |
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* |
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* See asm-generic/syscall.h for function descriptions. |
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* |
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* Copyright (C) 2015 Mickaël Salaün <[email protected]> |
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*/ |
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#ifndef __UM_SYSCALL_GENERIC_H |
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#define __UM_SYSCALL_GENERIC_H |
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#include <asm/ptrace.h> |
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#include <linux/err.h> |
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#include <linux/sched.h> |
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#include <sysdep/ptrace.h> |
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static inline int syscall_get_nr(struct task_struct *task, struct pt_regs *regs) |
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{ |
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return PT_REGS_SYSCALL_NR(regs); |
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} |
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static inline void syscall_rollback(struct task_struct *task, |
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struct pt_regs *regs) |
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{ |
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/* do nothing */ |
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} |
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static inline long syscall_get_error(struct task_struct *task, |
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struct pt_regs *regs) |
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{ |
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const long error = regs_return_value(regs); |
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return IS_ERR_VALUE(error) ? error : 0; |
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} |
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static inline long syscall_get_return_value(struct task_struct *task, |
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struct pt_regs *regs) |
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{ |
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return regs_return_value(regs); |
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} |
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static inline void syscall_set_return_value(struct task_struct *task, |
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struct pt_regs *regs, |
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int error, long val) |
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{ |
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PT_REGS_SET_SYSCALL_RETURN(regs, (long) error ?: val); |
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} |
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static inline void syscall_get_arguments(struct task_struct *task, |
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struct pt_regs *regs, |
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unsigned long *args) |
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{ |
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const struct uml_pt_regs *r = ®s->regs; |
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*args++ = UPT_SYSCALL_ARG1(r); |
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*args++ = UPT_SYSCALL_ARG2(r); |
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*args++ = UPT_SYSCALL_ARG3(r); |
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*args++ = UPT_SYSCALL_ARG4(r); |
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*args++ = UPT_SYSCALL_ARG5(r); |
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*args = UPT_SYSCALL_ARG6(r); |
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} |
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static inline void syscall_set_arguments(struct task_struct *task, |
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struct pt_regs *regs, |
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const unsigned long *args) |
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{ |
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struct uml_pt_regs *r = ®s->regs; |
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UPT_SYSCALL_ARG1(r) = *args++; |
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UPT_SYSCALL_ARG2(r) = *args++; |
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UPT_SYSCALL_ARG3(r) = *args++; |
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UPT_SYSCALL_ARG4(r) = *args++; |
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UPT_SYSCALL_ARG5(r) = *args++; |
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UPT_SYSCALL_ARG6(r) = *args; |
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} |
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/* See arch/x86/um/asm/syscall.h for syscall_get_arch() definition. */ |
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#endif /* __UM_SYSCALL_GENERIC_H */
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