alpha: introduce ret_from_kernel_execve(), switch to generic kernel_execve()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/alpha/include/asm/unistd.h b/arch/alpha/include/asm/unistd.h
index 7826e22..3cb6c11 100644
--- a/arch/alpha/include/asm/unistd.h
+++ b/arch/alpha/include/asm/unistd.h
@@ -482,6 +482,7 @@
#define __ARCH_WANT_SYS_SIGPENDING
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_SYS_EXECVE
+#define __ARCH_WANT_KERNEL_EXECVE
/* "Conditional" syscalls. What we want is
diff --git a/arch/alpha/kernel/entry.S b/arch/alpha/kernel/entry.S
index 421dccf..7e43e11 100644
--- a/arch/alpha/kernel/entry.S
+++ b/arch/alpha/kernel/entry.S
@@ -626,6 +626,19 @@
jmp $31, sys_exit
.end ret_from_kernel_thread
+ .globl ret_from_kernel_execve
+ .align 4
+ .ent ret_from_kernel_execve
+ret_from_kernel_execve:
+ mov $16, $sp
+ /* Avoid the HAE being gratuitously wrong, to avoid restoring it. */
+ ldq $2, alpha_mv+HAE_CACHE
+ stq $2, 152($sp) /* HAE */
+ mov $31, $19 /* to disable syscall restarts */
+ br $31, ret_to_user
+
+.end ret_from_kernel_execve
+
/*
* Special system calls. Most of these are special in that they either
diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c
index 6b33ecd..f47d764 100644
--- a/arch/alpha/kernel/process.c
+++ b/arch/alpha/kernel/process.c
@@ -435,22 +435,3 @@
}
return pc;
}
-
-int kernel_execve(const char *path, const char *const argv[], const char *const envp[])
-{
- /* Avoid the HAE being gratuitously wrong, which would cause us
- to do the whole turn off interrupts thing and restore it. */
- struct pt_regs regs = {.hae = alpha_mv.hae_cache};
- int err = do_execve(path, argv, envp, ®s);
- if (!err) {
- struct pt_regs *p = current_pt_regs();
- /* copy regs to normal position and off to userland we go... */
- *p = regs;
- __asm__ __volatile__ (
- "mov %0, $sp;"
- "br $31, ret_from_sys_call"
- : : "r"(p));
- }
- return err;
-}
-EXPORT_SYMBOL(kernel_execve);
