cris: switch to generic kernel_execve/sys_execve

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arch/cris/Kconfig

@@ -50,6 +50,7 @@ config CRIS
 	select GENERIC_CMOS_UPDATE
 	select MODULES_USE_ELF_RELA
 	select GENERIC_KERNEL_THREAD
+	select GENERIC_KERNEL_EXECVE
 
 config HZ
 	int

arch/cris/arch-v10/kernel/entry.S

@@ -87,8 +87,8 @@ ret_from_kernel_thread:
 	jsr schedule_tail
 	move.d	$r2, $r10	; argument is here
 	jsr	$r1		; call the payload
-	moveq	0, $r10
-	jsr	sys_exit	; never returns
+	moveq	0, $r9		; no syscall restarts, TYVM...
+	ba  ret_from_sys_call
 
 ret_from_intr:
 	;; check for resched if preemptive kernel or if we're going back to user-mode 
@@ -594,13 +594,6 @@ _ugdb_handle_breakpoint:
 	ba	do_sigtrap		; SIGTRAP the offending process. 
 	pop	$dccr			; Restore dccr in delay slot.
 
-	.global kernel_execve
-kernel_execve:
-	move.d __NR_execve, $r9
-	break 13
-	ret
-	nop
-
 	.data
 
 hw_bp_trigs:

arch/cris/arch-v10/kernel/process.c

@@ -167,29 +167,6 @@ asmlinkage int sys_vfork(void)
         return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, rdusp(), current_pt_regs(), 0, NULL, NULL);
 }
 
-/*
- * sys_execve() executes a new program.
- */
-asmlinkage int sys_execve(const char *fname,
-			  const char *const *argv,
-			  const char *const *envp,
-			  long r13, long mof, long srp, 
-			  struct pt_regs *regs)
-{
-	int error;
-	struct filename *filename;
-
-	filename = getname(fname);
-	error = PTR_ERR(filename);
-
-	if (IS_ERR(filename))
-	        goto out;
-	error = do_execve(filename->name, argv, envp, regs);
-	putname(filename);
- out:
-	return error;
-}
-
 unsigned long get_wchan(struct task_struct *p)
 {
 #if 0

arch/cris/arch-v32/kernel/entry.S

@@ -92,8 +92,8 @@ ret_from_kernel_thread:
 	move.d	$r2, $r10
 	jsr	$r1
 	nop
-	moveq	0, $r10
-	jsr	sys_exit
+	moveq	0, $r9			; no syscall restarts, TYVM...
+	ba  ret_from_sys_call
 	nop
 	.size	ret_from_kernel_thread, . - ret_from_kernel_thread
 
@@ -544,15 +544,6 @@ _ugdb_handle_exception:
 	ba	do_sigtrap		; SIGTRAP the offending process.
 	move.d	[$sp+], $r0		; Restore R0 in delay slot.
 
-	.global kernel_execve
-	.type	kernel_execve,@function
-kernel_execve:
-	move.d __NR_execve, $r9
-	break 13
-	ret
-	nop
-	.size	kernel_execve, . - kernel_execve
-
 	.data
 
 	.section .rodata,"a"

arch/cris/arch-v32/kernel/process.c

@@ -186,28 +186,6 @@ sys_vfork(void)
 	return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, rdusp(), current_pt_regs(), 0, NULL, NULL);
 }
 
-/* sys_execve() executes a new program. */
-asmlinkage int
-sys_execve(const char *fname,
-	   const char *const *argv,
-	   const char *const *envp, long r13, long mof, long srp,
-	   struct pt_regs *regs)
-{
-	int error;
-	struct filename *filename;
-
-	filename = getname(fname);
-	error = PTR_ERR(filename);
-
-	if (IS_ERR(filename))
-	        goto out;
-
-	error = do_execve(filename->name, argv, envp, regs);
-	putname(filename);
- out:
-	return error;
-}
-
 unsigned long
 get_wchan(struct task_struct *p)
 {

arch/cris/include/asm/unistd.h

@@ -371,6 +371,7 @@
 #define __ARCH_WANT_SYS_SIGPROCMASK
 #define __ARCH_WANT_SYS_RT_SIGACTION
 #define __ARCH_WANT_SYS_RT_SIGSUSPEND
+#define __ARCH_WANT_SYS_EXECVE
 
 /*
  * "Conditional" syscalls