From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/arch/arm/include/asm/syscall.h | 112 ++++++++++++++++++++++++++++++++++ 1 file changed, 112 insertions(+) create mode 100644 kernel/arch/arm/include/asm/syscall.h (limited to 'kernel/arch/arm/include/asm/syscall.h') diff --git a/kernel/arch/arm/include/asm/syscall.h b/kernel/arch/arm/include/asm/syscall.h new file mode 100644 index 000000000..e86c985b8 --- /dev/null +++ b/kernel/arch/arm/include/asm/syscall.h @@ -0,0 +1,112 @@ +/* + * Access to user system call parameters and results + * + * See asm-generic/syscall.h for descriptions of what we must do here. + */ + +#ifndef _ASM_ARM_SYSCALL_H +#define _ASM_ARM_SYSCALL_H + +#include /* for AUDIT_ARCH_* */ +#include /* for ELF_EM */ +#include +#include + +#include + +#define NR_syscalls (__NR_syscalls) + +extern const unsigned long sys_call_table[]; + +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 ? error : val; +} + +#define SYSCALL_MAX_ARGS 7 + +static inline void syscall_get_arguments(struct task_struct *task, + struct pt_regs *regs, + unsigned int i, unsigned int n, + unsigned long *args) +{ + if (n == 0) + return; + + if (i + n > SYSCALL_MAX_ARGS) { + unsigned long *args_bad = args + SYSCALL_MAX_ARGS - i; + unsigned int n_bad = n + i - SYSCALL_MAX_ARGS; + pr_warn("%s called with max args %d, handling only %d\n", + __func__, i + n, SYSCALL_MAX_ARGS); + memset(args_bad, 0, n_bad * sizeof(args[0])); + n = SYSCALL_MAX_ARGS - i; + } + + if (i == 0) { + args[0] = regs->ARM_ORIG_r0; + args++; + i++; + n--; + } + + memcpy(args, ®s->ARM_r0 + 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) +{ + if (n == 0) + return; + + if (i + n > SYSCALL_MAX_ARGS) { + pr_warn("%s called with max args %d, handling only %d\n", + __func__, i + n, SYSCALL_MAX_ARGS); + n = SYSCALL_MAX_ARGS - i; + } + + if (i == 0) { + regs->ARM_ORIG_r0 = args[0]; + args++; + i++; + n--; + } + + memcpy(®s->ARM_r0 + i, args, n * sizeof(args[0])); +} + +static inline int syscall_get_arch(void) +{ + /* ARM tasks don't change audit architectures on the fly. */ + return AUDIT_ARCH_ARM; +} + +#endif /* _ASM_ARM_SYSCALL_H */ -- cgit 1.2.3-korg