[Xen-devel] [PATCH] xen/arm: Init traps very early

[Julien Grall <julien.grall@xxxxxxxxxx>]

The function init_traps setups the handler taken when Xen hits a BUG_ON/ASSERT.

If an error happen before init_traps is called, we loose the backtrace.

As the function doesn't require any specific setup, we can call it just
after Xen has jumped in C code.

Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
---
 xen/arch/arm/setup.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c
index b9ce7a9..5bf8686 100644
--- a/xen/arch/arm/setup.c
+++ b/xen/arch/arm/setup.c
@@ -666,6 +666,7 @@ void __init start_xen(unsigned long boot_phys_offset,
     struct domain *dom0;
 
     setup_cache();
+    init_traps();
 
     percpu_init_areas();
     set_processor_id(0); /* needed early, for smp_processor_id() */
@@ -709,8 +710,6 @@ void __init start_xen(unsigned long boot_phys_offset,
     set_current((struct vcpu *)0xfffff000); /* debug sanity */
     idle_vcpu[0] = current;
 
-    init_traps();
-
     setup_virt_paging();
 
     p2m_vmid_allocator_init();
-- 
1.7.10.4


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