Sorry for the noise, it looks description is wrong.
This is not a double pop, but xen pv taking the path
with create_gap=0, I'll send a v2.
Zhenzhong
On 2019/7/11 12:47, Zhenzhong Duan wrote:
Commit 7457c0da024b ("x86/alternatives: Add int3_emulate_call()
selftest") reveals a bug in XEN PV
Commit 7457c0da024b ("x86/alternatives: Add int3_emulate_call()
selftest") reveals a bug in XEN PV int3 assemble code. There is
a double pop of register R11 and RCX currupting the exception
frame, one in xen_int3 and the other in xen_xenint3.
We see below hang at bootup:
general protection
