Blame src/thread/nt32/clone.c

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#define  _GNU_SOURCE
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#include <syscall.h>
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#include <sched.h>
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/* take advantage of i686 vararg abi */
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#define  __clone ____clone
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#include "pthread_impl.h"
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#undef   __clone
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struct pt_regs {
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	unsigned long	ebx;
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	unsigned long	ecx;
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	unsigned long	edx;
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	unsigned long	esi;
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	unsigned long	edi;
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	unsigned long	ebp;
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	unsigned long	eax;
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	unsigned long	xds;
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	unsigned long	xes;
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	unsigned long	xfs;
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	unsigned long	xgs;
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	unsigned long	orig_eax;
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	unsigned long	eip;
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	unsigned long	xcs;
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	unsigned long	eflags;
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	unsigned long	esp;
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	unsigned long	xss;
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	unsigned long	sbase;
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	unsigned long	slimit;
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	unsigned long	sbottom;
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};
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typedef long __sys_clone(
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	unsigned long	flags,
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	void *		child_stack,
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	void *		ptid,
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	void *		ctid,
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	struct pt_regs *regs);
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extern unsigned long ** __syscall_vtbl;
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int __clone(
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	__entry_point *	fn,
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	void *		child_stack,
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	int		flags,
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	void *		arg,
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	int *		ptid,
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	void *		pthread_self_addr,
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	int *		ctid)
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{
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	struct pt_regs	regs;
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	__sys_clone *	pfn_clone;
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	pthread_t	pthread;
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	regs.eip = (unsigned long)fn;
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	regs.ecx = (unsigned long)arg;
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	regs.edx = (unsigned long)pthread_self_addr;
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	pfn_clone = (__sys_clone *)(__syscall_vtbl[SYS_clone]);
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	if (flags == (CLONE_VM|CLONE_VFORK|SIGCHLD)) {
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		regs.sbase   = 0;
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		regs.slimit  = 0;
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		regs.sbottom = 0;
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		return (int)pfn_clone(
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			flags,
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			child_stack,
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			0,0,®s;;
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	}
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	pthread      = (pthread_t)pthread_self_addr;
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	regs.sbase   = (unsigned long)pthread->stack;
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	regs.slimit  = regs.sbase  - pthread->stack_size;
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	regs.sbottom = regs.slimit - pthread->guard_size;
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	return (int)pfn_clone(
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		flags,
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		child_stack,
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		ptid,
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		ctid,
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		®s;;
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}