x86: Merge sys_execve

Change 32-bit sys_execve to PTREGSCALL3, and merge with 64-bit.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
LKML-Reference: <1260403316-5679-4-git-send-email-brgerst@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

5 files changed, 29 insertions, 49 deletions

diff --git a/arch/x86/include/asm/syscalls.h b/arch/x86/include/asm/syscalls.h
index 4b694cd904c4..48c48e508b9f 100644
--- a/arch/x86/include/asm/syscalls.h
+++ b/arch/x86/include/asm/syscalls.h
@@ -23,6 +23,8 @@ long sys_iopl(unsigned int, struct pt_regs *);
 /* kernel/process.c */
 int sys_fork(struct pt_regs *);
 int sys_vfork(struct pt_regs *);
+long sys_execve(char __user *, char __user * __user *,
+                char __user * __user *, struct pt_regs *);
 
 /* kernel/ldt.c */
 asmlinkage int sys_modify_ldt(int, void __user *, unsigned long);
@@ -39,7 +41,6 @@ asmlinkage int sys_get_thread_area(struct user_desc __user *);
 
 /* kernel/process_32.c */
 int sys_clone(struct pt_regs *);
-int sys_execve(struct pt_regs *);
 
 /* kernel/signal.c */
 asmlinkage int sys_sigsuspend(int, int, old_sigset_t);
@@ -73,9 +74,6 @@ int sys_vm86(struct pt_regs *);
 asmlinkage long sys_clone(unsigned long, unsigned long,
                           void __user *, void __user *,
                           struct pt_regs *);
-asmlinkage long sys_execve(char __user *, char __user * __user *,
-                           char __user * __user *,
-                           struct pt_regs *);
 long sys_arch_prctl(int, unsigned long);
 
 /* kernel/signal.c */
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index ab7fcef37453..a96a0d8a0fdb 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -762,7 +762,7 @@ PTREGSCALL1(iopl)
 PTREGSCALL0(fork)
 PTREGSCALL0(clone)
 PTREGSCALL0(vfork)
-PTREGSCALL0(execve)
+PTREGSCALL3(execve)
 PTREGSCALL0(sigaltstack)
 PTREGSCALL0(sigreturn)
 PTREGSCALL0(rt_sigreturn)
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 5e2ba634ea15..bb17bd9334fb 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -236,6 +236,32 @@ int sys_vfork(struct pt_regs *regs)
 
 
 /*
+ * sys_execve() executes a new program.
+ */
+long sys_execve(char __user *name, char __user * __user *argv,
+                char __user * __user *envp, struct pt_regs *regs)
+{
+        long error;
+        char *filename;
+
+        filename = getname(name);
+        error = PTR_ERR(filename);
+        if (IS_ERR(filename))
+                return error;
+        error = do_execve(filename, argv, envp, regs);
+
+#ifdef CONFIG_X86_32
+        if (error == 0) {
+                /* Make sure we don't return using sysenter.. */
+                set_thread_flag(TIF_IRET);
+        }
+#endif
+
+        putname(filename);
+        return error;
+}
+
+/*
  * Idle related variables and functions
  */
 unsigned long boot_option_idle_override = 0;
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index 075580b35682..486e38e2900b 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -451,31 +451,6 @@ int sys_clone(struct pt_regs *regs)
         return do_fork(clone_flags, newsp, regs, 0, parent_tidptr, child_tidptr);
 }
 
-/*
- * sys_execve() executes a new program.
- */
-int sys_execve(struct pt_regs *regs)
-{
-        int error;
-        char *filename;
-
-        filename = getname((char __user *) regs->bx);
-        error = PTR_ERR(filename);
-        if (IS_ERR(filename))
-                goto out;
-        error = do_execve(filename,
-                        (char __user * __user *) regs->cx,
-                        (char __user * __user *) regs->dx,
-                        regs);
-        if (error == 0) {
-                /* Make sure we don't return using sysenter.. */
-                set_thread_flag(TIF_IRET);
-        }
-        putname(filename);
-out:
-        return error;
-}
-
 #define top_esp                (THREAD_SIZE - sizeof(unsigned long))
 #define top_ebp                (THREAD_SIZE - 2*sizeof(unsigned long))
 
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index c95c8f4e790a..671960d82587 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -520,25 +520,6 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
         return prev_p;
 }
 
-/*
- * sys_execve() executes a new program.
- */
-asmlinkage
-long sys_execve(char __user *name, char __user * __user *argv,
-                char __user * __user *envp, struct pt_regs *regs)
-{
-        long error;
-        char *filename;
-
-        filename = getname(name);
-        error = PTR_ERR(filename);
-        if (IS_ERR(filename))
-                return error;
-        error = do_execve(filename, argv, envp, regs);
-        putname(filename);
-        return error;
-}
-
 void set_personality_64bit(void)
 {
         /* inherit personality from parent */