Messages in this thread | | | From | Arnd Bergmann <> | Subject | Re: [PATCH 22/27] score: create kernel files signal.c sys_score.c time.c | Date | Tue, 9 Jun 2009 19:52:47 +0200 |
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On Tuesday 09 June 2009, liqin.chen@sunplusct.com wrote: > +asmlinkage long sys_mmap(unsigned long addr, size_t len, > + unsigned long prot, unsigned long flags, > + unsigned long fd, off_t offset) > +{ > + int err = -EINVAL; > + > + if (offset & ~PAGE_MASK) { > + printk(KERN_INFO "no pagemask in mmap\r\n"); > + goto out; > + } > + > + err = sys_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT); > +out: > + return err; > +}
A 32 bit kernel should only need sys_mmap2, not sys_mmap, because it is trivial to convert in user space.
> + > +asmlinkage long score_vfork(struct pt_regs *regs) > +{ > + return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->regs[0], > + regs, 0, NULL, NULL); > +} > + > +/* > + * Fork a new task - this creates a new program thread. > + * This is called indirectly via a small wrapper > + */ > +asmlinkage int > +score_fork(struct pt_regs *regs) > +{ > + return do_fork(SIGCHLD, regs->regs[0], regs, 0, NULL, NULL); > +}
Similarly, you should not need vfork and fork any more, because they can be handled in user space through clone().
Arnd <><
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