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yaml
---
r: 177370
b: refs/heads/master
c: df59e7b
h: refs/heads/master
v: v3
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Brian Gerst authored and H. Peter Anvin committed Dec 11, 2009
1 parent 377eaa8 commit da51bc7
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Showing 4 changed files with 36 additions and 73 deletions.
2 changes: 1 addition & 1 deletion [refs]
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: f443ff4201dd25cd4dec183f9919ecba90c8edc2
refs/heads/master: df59e7bf439918f523ac29e996ec1eebbed60440
35 changes: 35 additions & 0 deletions trunk/arch/x86/kernel/process.c
Original file line number Diff line number Diff line change
Expand Up @@ -243,6 +243,41 @@ sys_clone(unsigned long clone_flags, unsigned long newsp,
return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
}

/*
* This gets run with %si containing the
* function to call, and %di containing
* the "args".
*/
extern void kernel_thread_helper(void);

/*
* Create a kernel thread
*/
int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
{
struct pt_regs regs;

memset(&regs, 0, sizeof(regs));

regs.si = (unsigned long) fn;
regs.di = (unsigned long) arg;

#ifdef CONFIG_X86_32
regs.ds = __USER_DS;
regs.es = __USER_DS;
regs.fs = __KERNEL_PERCPU;
regs.gs = __KERNEL_STACK_CANARY;
#endif

regs.orig_ax = -1;
regs.ip = (unsigned long) kernel_thread_helper;
regs.cs = __KERNEL_CS | get_kernel_rpl();
regs.flags = X86_EFLAGS_IF | 0x2;

/* Ok, create the new process.. */
return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
}
EXPORT_SYMBOL(kernel_thread);

/*
* sys_execve() executes a new program.
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36 changes: 0 additions & 36 deletions trunk/arch/x86/kernel/process_32.c
Original file line number Diff line number Diff line change
Expand Up @@ -192,42 +192,6 @@ void show_regs(struct pt_regs *regs)
show_trace(NULL, regs, &regs->sp, regs->bp);
}

/*
* This gets run with %si containing the
* function to call, and %di containing
* the "args".
*/
extern void kernel_thread_helper(void);

/*
* Create a kernel thread
*/
int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
{
struct pt_regs regs;

memset(&regs, 0, sizeof(regs));

regs.si = (unsigned long) fn;
regs.di = (unsigned long) arg;

#ifdef CONFIG_X86_32
regs.ds = __USER_DS;
regs.es = __USER_DS;
regs.fs = __KERNEL_PERCPU;
regs.gs = __KERNEL_STACK_CANARY;
#endif

regs.orig_ax = -1;
regs.ip = (unsigned long) kernel_thread_helper;
regs.cs = __KERNEL_CS | get_kernel_rpl();
regs.flags = X86_EFLAGS_IF | 0x2;

/* Ok, create the new process.. */
return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
}
EXPORT_SYMBOL(kernel_thread);

void release_thread(struct task_struct *dead_task)
{
BUG_ON(dead_task->mm);
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36 changes: 0 additions & 36 deletions trunk/arch/x86/kernel/process_64.c
Original file line number Diff line number Diff line change
Expand Up @@ -229,42 +229,6 @@ void show_regs(struct pt_regs *regs)
show_trace(NULL, regs, (void *)(regs + 1), regs->bp);
}

/*
* This gets run with %si containing the
* function to call, and %di containing
* the "args".
*/
extern void kernel_thread_helper(void);

/*
* Create a kernel thread
*/
int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
{
struct pt_regs regs;

memset(&regs, 0, sizeof(regs));

regs.si = (unsigned long) fn;
regs.di = (unsigned long) arg;

#ifdef CONFIG_X86_32
regs.ds = __USER_DS;
regs.es = __USER_DS;
regs.fs = __KERNEL_PERCPU;
regs.gs = __KERNEL_STACK_CANARY;
#endif

regs.orig_ax = -1;
regs.ip = (unsigned long) kernel_thread_helper;
regs.cs = __KERNEL_CS | get_kernel_rpl();
regs.flags = X86_EFLAGS_IF | 0x2;

/* Ok, create the new process.. */
return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
}
EXPORT_SYMBOL(kernel_thread);

void release_thread(struct task_struct *dead_task)
{
if (dead_task->mm) {
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