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From: "kjlin" <kj.lin@viditec-netmedia.com.tw>
To: <linux-mips@oss.sgi.com>
Subject: fork() vs vfork()
Date: Thu, 20 Sep 2001 14:51:08 +0800	[thread overview]
Message-ID: <05e901c141a0$a03e6120$056aaac0@kjlin> (raw)

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Hi all,

How does linux-mips treat the vfork() function?
I can see the fork() implemented in syscall.c as following:

save_static_function(sys_fork);
static_unused int _sys_fork(struct pt_regs regs)
{
        int res;
        res = do_fork(SIGCHLD, regs.regs[29], &regs, 0);
        return res;
}

But i can't see anything about vfork/sys_vfork in mips platform.
However, the vfork() was implemented as sys_vfork in other architecture.
Such as arm platform:
asmlinkage int sys_vfork(struct pt_regs *regs)
{
        return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->ARM_sp, regs, 0);
}

Why not do the same "sys_vfork" in linux-mips?
Does it mean that MIPS does not support vfork() or vfork() is equal to fork() in MIPS platform?

Thanks,
KJ



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WARNING: multiple messages have this Message-ID (diff)
From: "kjlin" <kj.lin@viditec-netmedia.com.tw>
To: linux-mips@oss.sgi.com
Subject: fork() vs vfork()
Date: Thu, 20 Sep 2001 14:51:08 +0800	[thread overview]
Message-ID: <05e901c141a0$a03e6120$056aaac0@kjlin> (raw)
Message-ID: <20010920065108.7UDBjRtZMDHzkQva_pn4o-UOafe78lgaLuxMnRd8X1c@z> (raw)

[-- Attachment #1: Type: text/plain, Size: 776 bytes --]

Hi all,

How does linux-mips treat the vfork() function?
I can see the fork() implemented in syscall.c as following:

save_static_function(sys_fork);
static_unused int _sys_fork(struct pt_regs regs)
{
        int res;
        res = do_fork(SIGCHLD, regs.regs[29], &regs, 0);
        return res;
}

But i can't see anything about vfork/sys_vfork in mips platform.
However, the vfork() was implemented as sys_vfork in other architecture.
Such as arm platform:
asmlinkage int sys_vfork(struct pt_regs *regs)
{
        return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->ARM_sp, regs, 0);
}

Why not do the same "sys_vfork" in linux-mips?
Does it mean that MIPS does not support vfork() or vfork() is equal to fork() in MIPS platform?

Thanks,
KJ



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             reply	other threads:[~2001-09-20  7:11 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-09-20  6:51 kjlin [this message]
2001-09-20  6:51 ` fork() vs vfork() kjlin
2001-09-20 11:29 ` Ralf Baechle

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