Messages in this thread | | | Date | Mon, 11 Sep 2017 17:15:26 +0200 | From | Oleg Nesterov <> | Subject | Re: execve(NULL, argv, envp) for nommu? |
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On 09/08, Rob Landley wrote: > > So is exec(NULL, argv, envp) a reasonable thing to want?
I think that something like prctl(PR_OPEN_EXE_FILE) which does
dentry_open(current->mm->exe_file->path, O_PATH)
and returns fd make more sense.
Then you can do execveat(fd, "", ..., AT_EMPTY_PATH).
But to be honest, I can't understand the problem, because I know nothing about nommu.
You need to unblock parent sleeping in vfork(), and you can't do another fork (I don't undestand why).
Perhaps the child can create another thread? The main thread can exit after that and unblock the parent. Or perhaps even something like clone(CLONE_VM | CLONE_PARENT), I dunno...
Oleg.
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