So as to make backtracing tools happy, correctly close x86 stacks for
new threads as well as on callback in the x86_32 case since there is no
unwind marker.
Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>
diff -r 2e05a6173be0 extras/mini-os/arch/x86/x86_32.S
--- a/extras/mini-os/arch/x86/x86_32.S Fri Nov 23 11:58:11 2007 +0000
+++ b/extras/mini-os/arch/x86/x86_32.S Fri Nov 23 15:40:40 2007 +0000
@@ -125,6 +125,7 @@
cmpl $ecrit,%eax
jb critical_region_fixup
11: push %esp
+ xorl %ebp,%ebp
call do_hypervisor_callback
add $4,%esp
movl HYPERVISOR_shared_info,%esi
@@ -280,6 +281,8 @@
ENTRY(thread_starter)
popl %eax
popl %ebx
+ pushl $0
+ xorl %ebp,%ebp
pushl %eax
call *%ebx
call exit_thread
--- a/extras/mini-os/arch/x86/x86_64.S Fri Nov 23 11:58:11 2007 +0000
+++ b/extras/mini-os/arch/x86/x86_64.S Fri Nov 23 15:40:40 2007 +0000
@@ -379,6 +378,8 @@
ENTRY(thread_starter)
popq %rdi
popq %rbx
+ pushq $0
+ xorq %rbp,%rbp
call *%rbx
call exit_thread
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