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    Contents of /trunk/kernel26-xen/patches-2.6.25-r1/1083-2.6.25-xen-Handle-Xen-exception-stack-it-is-different-from-bar.patch

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    Revision 606 - (show annotations) (download)
    Thu May 22 23:13:13 2008 UTC (15 years, 11 months ago) by niro
    File size: 1511 byte(s) 
    -ver bump to 2.6.25-magellan-r1:
- linux-2.6.25.4
- fbcondecor-0.9.4
- squashfs-3.3
- unionfs-2.3.3
- tuxonice-3.0-rc7
- linux-phc-0.3.0
- acpi-dstd-0.9a
- reiser4
- xen-3.2.0
. ipw3945-1.2.2
    1 From ae6e8b1f9015e6c70f6945063bc4002926e81d4f Mon Sep 17 00:00:00 2001
    2 From: Eduardo Habkost <ehabkost@redhat.com>
    3 Date: Mon, 24 Dec 2007 17:22:58 -0200
    4 Subject: [PATCH] Handle Xen exception stack (it is different from baremetal stack) (FIXME)
    5
    6 Now Oopses make sense! :D
    7
    8 FIXME: This needs to be handled differently at runtime, not compile time.
    9
    10 Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
    11 ---
    12 arch/x86/kernel/entry_64.S | 18 ++++++++++++++++++
    13 1 files changed, 18 insertions(+), 0 deletions(-)
    14
    15 diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
    16 index 3fedbd6..d026834 100644
    17 --- a/arch/x86/kernel/entry_64.S
    18 +++ b/arch/x86/kernel/entry_64.S
    19 @@ -728,11 +728,28 @@ ENTRY(spurious_interrupt)
    20 apicinterrupt SPURIOUS_APIC_VECTOR,smp_spurious_interrupt
    21 END(spurious_interrupt)
    22
    23 +
    24 +/* Xen register handling */
    25 +#ifdef CONFIG_XEN
    26 + /*FIXME: select this at runtime */
    27 + .macro xen_fix_stack
    28 + movq (%rsp),%rcx
    29 + CFI_RESTORE rcx
    30 + movq 8(%rsp),%r11
    31 + CFI_RESTORE r11
    32 + addq $0x10,%rsp /* skip rcx and r11 */
    33 + CFI_ADJUST_CFA_OFFSET -0x10
    34 + .endm
    35 +#else
    36 + .macro xen_fix_stack
    37 + .endm
    38 +#endif
    39 /*
    40 * Exception entry points.
    41 */
    42 .macro zeroentry sym
    43 INTR_FRAME
    44 + xen_fix_stack
    45 pushq $0 /* push error code/oldrax */
    46 CFI_ADJUST_CFA_OFFSET 8
    47 pushq %rax /* push real oldrax to the rdi slot */
    48 @@ -745,6 +762,7 @@ END(spurious_interrupt)
    49
    50 .macro errorentry sym
    51 XCPT_FRAME
    52 + xen_fix_stack
    53 pushq %rax
    54 CFI_ADJUST_CFA_OFFSET 8
    55 CFI_REL_OFFSET rax,0
    56 --
    57 1.5.4.1
    58