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x86: Merge sys_execve

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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>
This commit is contained in:
Brian Gerst 2009-12-09 19:01:53 -05:00 committed by H. Peter Anvin
parent 27f59559d6
commit 11cf88bd0b
5 changed files with 29 additions and 49 deletions
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6
arch/x86/include/asm/syscalls.h
View File

@ -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 */

2
arch/x86/kernel/entry_32.S
View File

@ -762,7 +762,7 @@ PTREGSCALL1(iopl)
PTREGSCALL0(fork)
PTREGSCALL0(clone)
PTREGSCALL0(vfork)
PTREGSCALL0(execve)
PTREGSCALL3(execve)
PTREGSCALL0(sigaltstack)
PTREGSCALL0(sigreturn)
PTREGSCALL0(rt_sigreturn)

26
arch/x86/kernel/process.c
View File

@ -235,6 +235,32 @@ 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
*/

25
arch/x86/kernel/process_32.c
View File

@ -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))

19
arch/x86/kernel/process_64.c
View File

@ -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 */