Blame src/thread/nt32/clone.c
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/**************************************************************************/
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/* mmglue: midipix architecture- and target-specific bits for musl libc */
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/* Copyright (C) 2013--2023 SysDeer Technologies, LLC */
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/* Released under the Standard MIT License; see COPYING.MMGLUE. */
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/**************************************************************************/
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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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}
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