Re: i386 start routine
[email protected] (Emmanuel Dreyfus)
| Newsgroups | gmane.os.netbsd.ports.i386 |
|---|---|
| Message-ID | <1oe8k2m.1ezxpav17uvakpM%[email protected]> |
Emmanuel Dreyfus <[email protected]> wrote: > The CR0 change cause the memory pointed by the stack pointer to be > unmapped. As a result, the pushl $begin does not push begin adddress on > the stack, and ret launches us in the twilight zone. > > Why enabling protected mode and paging makes a mapping disapear? Further reading teaches me that setting CR0_PG enable the mapping given in CR3, which was built earlier in the file. I understand the temporary stack is not mapped. I wonder how this is supposed to work. -- Emmanuel Dreyfus http://hcpnet.free.fr/pubz [email protected]