diff --git a/arch/arm/include/asm/syscall.h b/arch/arm/include/asm/syscall.h new file mode 100644 index 0000000000000000000000000000000000000000..2834036be6cf5a1e48d9e50e889ce62db2b3904f --- /dev/null +++ b/arch/arm/include/asm/syscall.h @@ -0,0 +1,80 @@ +/* + * Access to user system call parameters and results + * + * Copyright (C) 2012 The Chromium OS Authors <chromium-os-dev@chromium.org> + * + * This copyrighted material is made available to anyone wishing to use, + * modify, copy, or redistribute it subject to the terms and conditions + * of the GNU General Public License v.2. + * + * See asm-generic/syscall.h for descriptions of what we must do here. + */ +#ifndef _ASM_ARM_SYSCALL_H +#define _ASM_ARM_SYSCALL_H + +#include <linux/audit.h> /* for AUDIT_ARCH_* */ +#include <linux/elf.h> /* for ELF_EM */ +#include <linux/sched.h> +#include <linux/thread_info.h> /* for task_thread_info */ +#include <linux/err.h> + +static inline int syscall_get_nr(struct task_struct *task, struct pt_regs *regs) +{ + return task_thread_info(task)->syscall; +} + +static inline void syscall_rollback(struct task_struct *task, + struct pt_regs *regs) +{ + regs->ARM_r0 = regs->ARM_ORIG_r0; +} + +static inline long syscall_get_error(struct task_struct *task, + struct pt_regs *regs) +{ + unsigned long error = regs->ARM_r0; + return IS_ERR_VALUE(error) ? error : 0; +} + +static inline long syscall_get_return_value(struct task_struct *task, + struct pt_regs *regs) +{ + return regs->ARM_r0; +} + +static inline void syscall_set_return_value(struct task_struct *task, + struct pt_regs *regs, + int error, long val) +{ + regs->ARM_r0 = (long) error ?: val; +} + +static inline void syscall_get_arguments(struct task_struct *task, + struct pt_regs *regs, + unsigned int i, unsigned int n, + unsigned long *args) +{ + BUG_ON(i + n > 6); + memcpy(args, ®s->ARM_r1 + i, n * sizeof(args[0])); +} + +static inline void syscall_set_arguments(struct task_struct *task, + struct pt_regs *regs, + unsigned int i, unsigned int n, + const unsigned long *args) +{ + BUG_ON(i + n > 6); + memcpy(®s->ARM_r1 + i, args, n * sizeof(args[0])); +} + +static inline int syscall_get_arch(struct task_struct *task, + struct pt_regs *regs) +{ + /* ARM tasks don't change audit architectures on the fly. */ +#ifdef __ARMEB__ + return AUDIT_ARCH_ARMEB; +#else + return AUDIT_ARCH_ARM; +#endif +} +#endif /* _ASM_ARM_SYSCALL_H */