Messages in this thread |  | | Date | Mon, 06 Jan 2003 10:42:11 -0800 | From | Ulrich Drepper <> | Subject | Re: [PATCH] Set TIF_IRET in more places |
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Luca Barbieri wrote:
> 1. vfork seems to not set any TIF_ flags so a ptracer setting regs > while a vforking task is stopped in ptrace_notify called from vfork > would result in clobbered %ecx and %edx.
Just to be clear: the vfork syscall does not use sysenter. It's not possible with the current implementation. The magic sysenter wrapping code would have to recognize the syscall and handle it special by saving the return address. From glibc's POV the %edx register would be free but I consider this interface far to fragile.
-- --------------. ,-. 444 Castro Street Ulrich Drepper \ ,-----------------' \ Mountain View, CA 94041 USA Red Hat `--' drepper at redhat.com `---------------------------
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