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Subject[tip:x86/asm] x86: Merge sys_execve
Commit-ID:  11cf88bd0b8165b65aaabaee0977e9a3ad474ab7
Gitweb: http://git.kernel.org/tip/11cf88bd0b8165b65aaabaee0977e9a3ad474ab7
Author: Brian Gerst <brgerst@gmail.com>
AuthorDate: Wed, 9 Dec 2009 19:01:53 -0500
Committer: H. Peter Anvin <hpa@zytor.com>
CommitDate: Wed, 9 Dec 2009 16:28:34 -0800

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>
---
arch/x86/include/asm/syscalls.h | 6 ++----
arch/x86/kernel/entry_32.S | 2 +-
arch/x86/kernel/process.c | 26 ++++++++++++++++++++++++++
arch/x86/kernel/process_32.c | 25 -------------------------
arch/x86/kernel/process_64.c | 19 -------------------
5 files changed, 29 insertions(+), 49 deletions(-)
diff --git a/arch/x86/include/asm/syscalls.h b/arch/x86/include/asm/syscalls.h
index 4b694cd..48c48e5 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 ab7fcef..a96a0d8 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 5e2ba63..bb17bd9 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 075580b..486e38e 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 c95c8f4..671960d 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 */

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