From 7f1f311ac7b7b9c779fd207a20369f7fa3a61ba6 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Thu, 4 Oct 2012 08:34:57 -0400
Subject: [PATCH] parisc: switch to generic sys_execve()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 arch/parisc/include/asm/unistd.h   |  1 +
 arch/parisc/kernel/entry.S         | 46 ------------------------------
 arch/parisc/kernel/process.c       | 23 ---------------
 arch/parisc/kernel/sys_parisc32.c  | 22 --------------
 arch/parisc/kernel/syscall_table.S |  2 +-
 5 files changed, 2 insertions(+), 92 deletions(-)

diff --git a/arch/parisc/include/asm/unistd.h b/arch/parisc/include/asm/unistd.h
index 447e03c4823..b9e39f33590 100644
--- a/arch/parisc/include/asm/unistd.h
+++ b/arch/parisc/include/asm/unistd.h
@@ -996,6 +996,7 @@ type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5)	\
 #define __ARCH_WANT_SYS_RT_SIGSUSPEND
 #define __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND
 #define __ARCH_WANT_KERNEL_EXECVE
+#define __ARCH_WANT_SYS_EXECVE
 
 #endif /* __ASSEMBLY__ */
 
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index a26917da9b2..7d22e97347b 100644
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -1804,52 +1804,6 @@ ENTRY(sys_vfork_wrapper)
 ENDPROC(sys_vfork_wrapper)
 
 	
-	.macro  execve_wrapper execve
-	LDREG	TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
-	ldo	TASK_REGS(%r1),%r1	/* get pt regs */
-
-	/*
-	 * Do we need to save/restore r3-r18 here?
-	 * I don't think so. why would new thread need old
-	 * threads registers?
-	 */
-
-	/* %arg0 - %arg3 are already saved for us. */
-
-	STREG %r2,-RP_OFFSET(%r30)
-	ldo FRAME_SIZE(%r30),%r30
-#ifdef CONFIG_64BIT
-	ldo	-16(%r30),%r29		/* Reference param save area */
-#endif
-	BL \execve,%r2
-	copy %r1,%arg0
-
-	ldo -FRAME_SIZE(%r30),%r30
-	LDREG -RP_OFFSET(%r30),%r2
-
-	/* If exec succeeded we need to load the args */
-
-	ldo -1024(%r0),%r1
-	cmpb,>>= %r28,%r1,error_\execve
-	copy %r2,%r19
-
-error_\execve:
-	bv %r0(%r19)
-	nop
-	.endm
-
-	.import sys_execve
-ENTRY(sys_execve_wrapper)
-	execve_wrapper sys_execve
-ENDPROC(sys_execve_wrapper)
-
-#ifdef CONFIG_64BIT
-	.import sys32_execve
-ENTRY(sys32_execve_wrapper)
-	execve_wrapper sys32_execve
-ENDPROC(sys32_execve_wrapper)
-#endif
-
 ENTRY(sys_rt_sigreturn_wrapper)
 	LDREG	TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r26
 	ldo	TASK_REGS(%r26),%r26	/* get pt regs */
diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c
index f3f6408bfb4..44e8534c52e 100644
--- a/arch/parisc/kernel/process.c
+++ b/arch/parisc/kernel/process.c
@@ -314,29 +314,6 @@ unsigned long thread_saved_pc(struct task_struct *t)
 	return t->thread.regs.kpc;
 }
 
-/*
- * sys_execve() executes a new program.
- */
-
-asmlinkage int sys_execve(struct pt_regs *regs)
-{
-	int error;
-	struct filename *filename;
-
-	filename = getname((const char __user *) regs->gr[26]);
-	error = PTR_ERR(filename);
-	if (IS_ERR(filename))
-		goto out;
-	error = do_execve(filename->name,
-			  (const char __user *const __user *) regs->gr[25],
-			  (const char __user *const __user *) regs->gr[24],
-			  regs);
-	putname(filename);
-out:
-
-	return error;
-}
-
 unsigned long
 get_wchan(struct task_struct *p)
 {
diff --git a/arch/parisc/kernel/sys_parisc32.c b/arch/parisc/kernel/sys_parisc32.c
index bf5b93a885d..9cfdaa19ab6 100644
--- a/arch/parisc/kernel/sys_parisc32.c
+++ b/arch/parisc/kernel/sys_parisc32.c
@@ -53,28 +53,6 @@
 #define DBG(x)
 #endif
 
-/*
- * sys32_execve() executes a new program.
- */
-
-asmlinkage int sys32_execve(struct pt_regs *regs)
-{
-	int error;
-	struct filename *filename;
-
-	DBG(("sys32_execve(%p) r26 = 0x%lx\n", regs, regs->gr[26]));
-	filename = getname((const char __user *) regs->gr[26]);
-	error = PTR_ERR(filename);
-	if (IS_ERR(filename))
-		goto out;
-	error = compat_do_execve(filename->name, compat_ptr(regs->gr[25]),
-				 compat_ptr(regs->gr[24]), regs);
-	putname(filename);
-out:
-
-	return error;
-}
-
 asmlinkage long sys32_unimplemented(int r26, int r25, int r24, int r23,
 	int r22, int r21, int r20)
 {
diff --git a/arch/parisc/kernel/syscall_table.S b/arch/parisc/kernel/syscall_table.S
index 3735abd7f8f..cb2da96d6ab 100644
--- a/arch/parisc/kernel/syscall_table.S
+++ b/arch/parisc/kernel/syscall_table.S
@@ -66,7 +66,7 @@
 	ENTRY_SAME(creat)
 	ENTRY_SAME(link)
 	ENTRY_SAME(unlink)		/* 10 */
-	ENTRY_DIFF(execve_wrapper)
+	ENTRY_COMP(execve)
 	ENTRY_SAME(chdir)
 	/* See comments in kernel/time.c!!! Maybe we don't need this? */
 	ENTRY_COMP(time)
-- 
2.41.0