* [Qemu-devel] kernel kqemu and interrupt handler
@ 2008-04-26 1:00 Samuel Thibault
0 siblings, 0 replies; only message in thread
From: Samuel Thibault @ 2008-04-26 1:00 UTC (permalink / raw)
To: qemu-devel
Hello,
I'm trying to make GNU Mach work with -kernel-kqemu, and the only
problem I'm having is with IRQ handling while from kernel context: the
handler roughly does
entry:
cld
pushl %ds
pushl %es
pushl %fs
pushl %gs
etc. call handler
popl %gs
popl %fs
popl %es
popl %ds
I get a General protection fault on popl %gs. Looking at the stack
shows me that pushl %gs has pushed 0x13 instead of 0x10. While I
understand why this is so (we're running in CPL 3 anyway), I wonder how
this is supposed to work, and even more, how linux works (since it
roughly does the same)...
Samuel
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2008-04-26 1:00 [Qemu-devel] kernel kqemu and interrupt handler Samuel Thibault
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