mirror of
https://github.com/brain-hackers/linux-brain.git
synced 2024-06-09 23:36:23 +09:00
32d9258662
After removing the start and count arguments of syscall_get_arguments() it seems reasonable to remove them from syscall_set_arguments(). Note, as of today, there are no users of syscall_set_arguments(). But we are told that there will be soon. But for now, at least make it consistent with syscall_get_arguments(). Link: http://lkml.kernel.org/r/20190327222014.GA32540@altlinux.org Cc: Oleg Nesterov <oleg@redhat.com> Cc: Kees Cook <keescook@chromium.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Dave Martin <dave.martin@arm.com> Cc: "Dmitry V. Levin" <ldv@altlinux.org> Cc: x86@kernel.org Cc: linux-snps-arc@lists.infradead.org Cc: linux-kernel@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-c6x-dev@linux-c6x.org Cc: uclinux-h8-devel@lists.sourceforge.jp Cc: linux-hexagon@vger.kernel.org Cc: linux-ia64@vger.kernel.org Cc: linux-mips@vger.kernel.org Cc: nios2-dev@lists.rocketboards.org Cc: openrisc@lists.librecores.org Cc: linux-parisc@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-riscv@lists.infradead.org Cc: linux-s390@vger.kernel.org Cc: linux-sh@vger.kernel.org Cc: sparclinux@vger.kernel.org Cc: linux-um@lists.infradead.org Cc: linux-xtensa@linux-xtensa.org Cc: linux-arch@vger.kernel.org Acked-by: Max Filippov <jcmvbkbc@gmail.com> # For xtensa changes Acked-by: Will Deacon <will.deacon@arm.com> # For the arm64 bits Reviewed-by: Thomas Gleixner <tglx@linutronix.de> # for x86 Reviewed-by: Dmitry V. Levin <ldv@altlinux.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
96 lines
2.2 KiB
C
96 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Access to user system call parameters and results
|
|
*
|
|
* Copyright IBM Corp. 2008
|
|
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
|
|
*/
|
|
|
|
#ifndef _ASM_SYSCALL_H
|
|
#define _ASM_SYSCALL_H 1
|
|
|
|
#include <uapi/linux/audit.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/err.h>
|
|
#include <asm/ptrace.h>
|
|
|
|
/*
|
|
* The syscall table always contains 32 bit pointers since we know that the
|
|
* address of the function to be called is (way) below 4GB. So the "int"
|
|
* type here is what we want [need] for both 32 bit and 64 bit systems.
|
|
*/
|
|
extern const unsigned int sys_call_table[];
|
|
extern const unsigned int sys_call_table_emu[];
|
|
|
|
static inline long syscall_get_nr(struct task_struct *task,
|
|
struct pt_regs *regs)
|
|
{
|
|
return test_pt_regs_flag(regs, PIF_SYSCALL) ?
|
|
(regs->int_code & 0xffff) : -1;
|
|
}
|
|
|
|
static inline void syscall_rollback(struct task_struct *task,
|
|
struct pt_regs *regs)
|
|
{
|
|
regs->gprs[2] = regs->orig_gpr2;
|
|
}
|
|
|
|
static inline long syscall_get_error(struct task_struct *task,
|
|
struct pt_regs *regs)
|
|
{
|
|
return IS_ERR_VALUE(regs->gprs[2]) ? regs->gprs[2] : 0;
|
|
}
|
|
|
|
static inline long syscall_get_return_value(struct task_struct *task,
|
|
struct pt_regs *regs)
|
|
{
|
|
return regs->gprs[2];
|
|
}
|
|
|
|
static inline void syscall_set_return_value(struct task_struct *task,
|
|
struct pt_regs *regs,
|
|
int error, long val)
|
|
{
|
|
regs->gprs[2] = error ? error : val;
|
|
}
|
|
|
|
static inline void syscall_get_arguments(struct task_struct *task,
|
|
struct pt_regs *regs,
|
|
unsigned long *args)
|
|
{
|
|
unsigned long mask = -1UL;
|
|
unsigned int n = 6;
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
if (test_tsk_thread_flag(task, TIF_31BIT))
|
|
mask = 0xffffffff;
|
|
#endif
|
|
while (n-- > 0)
|
|
if (n > 0)
|
|
args[n] = regs->gprs[2 + n] & mask;
|
|
|
|
args[0] = regs->orig_gpr2 & mask;
|
|
}
|
|
|
|
static inline void syscall_set_arguments(struct task_struct *task,
|
|
struct pt_regs *regs,
|
|
const unsigned long *args)
|
|
{
|
|
unsigned int n = 6;
|
|
|
|
while (n-- > 0)
|
|
if (n > 0)
|
|
regs->gprs[2 + n] = args[n];
|
|
regs->orig_gpr2 = args[0];
|
|
}
|
|
|
|
static inline int syscall_get_arch(void)
|
|
{
|
|
#ifdef CONFIG_COMPAT
|
|
if (test_tsk_thread_flag(current, TIF_31BIT))
|
|
return AUDIT_ARCH_S390;
|
|
#endif
|
|
return AUDIT_ARCH_S390X;
|
|
}
|
|
#endif /* _ASM_SYSCALL_H */
|