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git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
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Dmitry V. Levin
cc6622730b
Similar to syscall_set_arguments() that complements syscall_get_arguments(), introduce syscall_set_nr() that complements syscall_get_nr(). syscall_set_nr() is going to be needed along with syscall_set_arguments() on all HAVE_ARCH_TRACEHOOK architectures to implement PTRACE_SET_SYSCALL_INFO API. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Dmitry V. Levin <[email protected]> Tested-by: Charlie Jenkins <[email protected]> Reviewed-by: Charlie Jenkins <[email protected]> Acked-by: Helge Deller <[email protected]> # parisc Reviewed-by: Maciej W. Rozycki <[email protected]> # mips Cc: Alexander Gordeev <[email protected]> Cc: Alexey Gladkov (Intel) <[email protected]> Cc: Andreas Larsson <[email protected]> Cc: anton ivanov <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Borislav Betkov <[email protected]> Cc: Brian Cain <[email protected]> Cc: Christian Borntraeger <[email protected]> Cc: Christian Zankel <[email protected]> Cc: Christophe Leroy <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Davide Berardi <[email protected]> Cc: David S. Miller <[email protected]> Cc: Dinh Nguyen <[email protected]> Cc: Eugene Syromiatnikov <[email protected]> Cc: Eugene Syromyatnikov <[email protected]> Cc: Geert Uytterhoeven <[email protected]> Cc: Guo Ren <[email protected]> Cc: Heiko Carstens <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: Huacai Chen <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Johannes Berg <[email protected]> Cc: John Paul Adrian Glaubitz <[email protected]> Cc: Jonas Bonn <[email protected]> Cc: Madhavan Srinivasan <[email protected]> Cc: Max Filippov <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Michal Simek <[email protected]> Cc: Mike Frysinger <[email protected]> Cc: Naveen N Rao <[email protected]> Cc: Nicholas Piggin <[email protected]> Cc: Oleg Nesterov <[email protected]> Cc: Renzo Davoi <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: Rich Felker <[email protected]> Cc: Russel King <[email protected]> Cc: Shuah Khan <[email protected]> Cc: Stafford Horne <[email protected]> Cc: Stefan Kristiansson <[email protected]> Cc: Sven Schnelle <[email protected]> Cc: Thomas Gleinxer <[email protected]> Cc: Vasily Gorbik <[email protected]> Cc: Vineet Gupta <[email protected]> Cc: WANG Xuerui <[email protected]> Cc: Will Deacon <[email protected]> Cc: Yoshinori Sato <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
106 lines
2.3 KiB
C
106 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
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*/
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#ifndef _ASM_ARC_SYSCALL_H
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#define _ASM_ARC_SYSCALL_H 1
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#include <uapi/linux/audit.h>
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#include <linux/err.h>
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#include <linux/sched.h>
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#include <asm/unistd.h>
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#include <asm/ptrace.h> /* in_syscall() */
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extern void *sys_call_table[];
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static inline long
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syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
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{
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if (user_mode(regs) && in_syscall(regs))
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return regs->r8;
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else
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return -1;
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}
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static inline void
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syscall_set_nr(struct task_struct *task, struct pt_regs *regs, int nr)
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{
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/*
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* Unlike syscall_get_nr(), syscall_set_nr() can be called only when
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* the target task is stopped for tracing on entering syscall, so
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* there is no need to have the same check syscall_get_nr() has.
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*/
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regs->r8 = nr;
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}
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static inline void
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syscall_rollback(struct task_struct *task, struct pt_regs *regs)
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{
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regs->r0 = regs->orig_r0;
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}
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static inline long
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syscall_get_error(struct task_struct *task, struct pt_regs *regs)
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{
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/* 0 if syscall succeeded, otherwise -Errorcode */
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return IS_ERR_VALUE(regs->r0) ? regs->r0 : 0;
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}
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static inline long
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syscall_get_return_value(struct task_struct *task, struct pt_regs *regs)
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{
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return regs->r0;
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}
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static inline void
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syscall_set_return_value(struct task_struct *task, struct pt_regs *regs,
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int error, long val)
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{
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regs->r0 = (long) error ?: val;
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}
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/*
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* @i: argument index [0,5]
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* @n: number of arguments; n+i must be [1,6].
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*/
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static inline void
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syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
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unsigned long *args)
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{
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unsigned long *inside_ptregs = &(regs->r0);
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unsigned int n = 6;
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unsigned int i = 0;
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while (n--) {
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args[i++] = (*inside_ptregs);
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inside_ptregs--;
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}
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}
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static inline void
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syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,
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unsigned long *args)
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{
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unsigned long *inside_ptregs = ®s->r0;
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unsigned int n = 6;
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unsigned int i = 0;
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while (n--) {
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*inside_ptregs = args[i++];
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inside_ptregs--;
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}
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}
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static inline int
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syscall_get_arch(struct task_struct *task)
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{
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return IS_ENABLED(CONFIG_ISA_ARCOMPACT)
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? (IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)
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? AUDIT_ARCH_ARCOMPACTBE : AUDIT_ARCH_ARCOMPACT)
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: (IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)
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? AUDIT_ARCH_ARCV2BE : AUDIT_ARCH_ARCV2);
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}
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#endif
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