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Diffstat (limited to 'arch/arm64/kernel/sys.c')
-rw-r--r--arch/arm64/kernel/sys.c76
1 files changed, 3 insertions, 73 deletions
diff --git a/arch/arm64/kernel/sys.c b/arch/arm64/kernel/sys.c
index b120df37de35..4364df85050e 100644
--- a/arch/arm64/kernel/sys.c
+++ b/arch/arm64/kernel/sys.c
@@ -31,79 +31,11 @@
*/
asmlinkage long sys_clone(unsigned long clone_flags, unsigned long newsp,
int __user *parent_tidptr, unsigned long tls_val,
- int __user *child_tidptr, struct pt_regs *regs)
+ int __user *child_tidptr)
{
- if (!newsp)
- newsp = regs->sp;
- /* 16-byte aligned stack mandatory on AArch64 */
- if (newsp & 15)
- return -EINVAL;
- return do_fork(clone_flags, newsp, regs, 0, parent_tidptr, child_tidptr);
-}
-
-/*
- * sys_execve() executes a new program.
- */
-asmlinkage long sys_execve(const char __user *filenamei,
- const char __user *const __user *argv,
- const char __user *const __user *envp,
- struct pt_regs *regs)
-{
- long error;
- struct filename *filename;
-
- filename = getname(filenamei);
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- goto out;
- error = do_execve(filename->name, argv, envp, regs);
- putname(filename);
-out:
- return error;
-}
-
-int kernel_execve(const char *filename,
- const char *const argv[],
- const char *const envp[])
-{
- struct pt_regs regs;
- int ret;
-
- memset(&regs, 0, sizeof(struct pt_regs));
- ret = do_execve(filename,
- (const char __user *const __user *)argv,
- (const char __user *const __user *)envp, &regs);
- if (ret < 0)
- goto out;
-
- /*
- * Save argc to the register structure for userspace.
- */
- regs.regs[0] = ret;
-
- /*
- * We were successful. We won't be returning to our caller, but
- * instead to user space by manipulating the kernel stack.
- */
- asm( "add x0, %0, %1\n\t"
- "mov x1, %2\n\t"
- "mov x2, %3\n\t"
- "bl memmove\n\t" /* copy regs to top of stack */
- "mov x27, #0\n\t" /* not a syscall */
- "mov x28, %0\n\t" /* thread structure */
- "mov sp, x0\n\t" /* reposition stack pointer */
- "b ret_to_user"
- :
- : "r" (current_thread_info()),
- "Ir" (THREAD_START_SP - sizeof(regs)),
- "r" (&regs),
- "Ir" (sizeof(regs))
- : "x0", "x1", "x2", "x27", "x28", "x30", "memory");
-
- out:
- return ret;
+ return do_fork(clone_flags, newsp, current_pt_regs(), 0,
+ parent_tidptr, child_tidptr);
}
-EXPORT_SYMBOL(kernel_execve);
asmlinkage long sys_mmap(unsigned long addr, unsigned long len,
unsigned long prot, unsigned long flags,
@@ -118,8 +50,6 @@ asmlinkage long sys_mmap(unsigned long addr, unsigned long len,
/*
* Wrappers to pass the pt_regs argument.
*/
-#define sys_execve sys_execve_wrapper
-#define sys_clone sys_clone_wrapper
#define sys_rt_sigreturn sys_rt_sigreturn_wrapper
#define sys_sigaltstack sys_sigaltstack_wrapper