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x86: Merge sys_clone

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Change 32-bit sys_clone to new PTREGSCALL stub, and merge with 64-bit.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
LKML-Reference: <1260403316-5679-7-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 19:01:56 -05:00 committed by H. Peter Anvin
parent f1382f157f
commit f839bbc5c8
5 changed files with 24 additions and 31 deletions
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8
arch/x86/include/asm/syscalls.h
View File

@ -25,6 +25,8 @@ 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 *);
long sys_clone(unsigned long, unsigned long, void __user *,
void __user *, struct pt_regs *);
/* kernel/ldt.c */
asmlinkage int sys_modify_ldt(int, void __user *, unsigned long);
@ -42,9 +44,6 @@ asmlinkage int sys_get_thread_area(struct user_desc __user *);
/* X86_32 only */
#ifdef CONFIG_X86_32
/* kernel/process_32.c */
int sys_clone(struct pt_regs *);
/* kernel/signal.c */
asmlinkage int sys_sigsuspend(int, int, old_sigset_t);
asmlinkage int sys_sigaction(int, const struct old_sigaction __user *,
@ -73,9 +72,6 @@ int sys_vm86(unsigned long, unsigned long, struct pt_regs *);
/* X86_64 only */
/* kernel/process_64.c */
asmlinkage long sys_clone(unsigned long, unsigned long,
void __user *, void __user *,
struct pt_regs *);
long sys_arch_prctl(int, unsigned long);
/* kernel/sys_x86_64.c */

14
arch/x86/kernel/entry_32.S
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@ -760,7 +760,6 @@ ptregs_##name: \
PTREGSCALL1(iopl)
PTREGSCALL0(fork)
PTREGSCALL0(clone)
PTREGSCALL0(vfork)
PTREGSCALL3(execve)
PTREGSCALL2(sigaltstack)
@ -769,6 +768,19 @@ PTREGSCALL0(rt_sigreturn)
PTREGSCALL2(vm86)
PTREGSCALL1(vm86old)
/* Clone is an oddball. The 4th arg is in %edi */
ALIGN;
ptregs_clone:
leal 4(%esp),%eax
pushl %eax
pushl PT_EDI(%eax)
movl PT_EDX(%eax),%ecx
movl PT_ECX(%eax),%edx
movl PT_EBX(%eax),%eax
call sys_clone
addl $8,%esp
ret
.macro FIXUP_ESPFIX_STACK
/*
* Switch back for ESPFIX stack to the normal zerobased stack

9
arch/x86/kernel/process.c
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@ -234,6 +234,15 @@ int sys_vfork(struct pt_regs *regs)
NULL, NULL);
}
long
sys_clone(unsigned long clone_flags, unsigned long newsp,
void __user *parent_tid, void __user *child_tid, struct pt_regs *regs)
{
if (!newsp)
newsp = regs->sp;
return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
}
/*
* sys_execve() executes a new program.

15
arch/x86/kernel/process_32.c
View File

@ -436,21 +436,6 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
return prev_p;
}
int sys_clone(struct pt_regs *regs)
{
unsigned long clone_flags;
unsigned long newsp;
int __user *parent_tidptr, *child_tidptr;
clone_flags = regs->bx;
newsp = regs->cx;
parent_tidptr = (int __user *)regs->dx;
child_tidptr = (int __user *)regs->di;
if (!newsp)
newsp = regs->sp;
return do_fork(clone_flags, newsp, regs, 0, parent_tidptr, child_tidptr);
}
#define top_esp (THREAD_SIZE - sizeof(unsigned long))
#define top_ebp (THREAD_SIZE - 2*sizeof(unsigned long))

9
arch/x86/kernel/process_64.c
View File

@ -534,15 +534,6 @@ void set_personality_64bit(void)
current->personality &= ~READ_IMPLIES_EXEC;
}
asmlinkage long
sys_clone(unsigned long clone_flags, unsigned long newsp,
void __user *parent_tid, void __user *child_tid, struct pt_regs *regs)
{
if (!newsp)
newsp = regs->sp;
return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
}
unsigned long get_wchan(struct task_struct *p)
{
unsigned long stack;