http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=687
gareth@xxxxxxxxxxxxxx changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |gareth@xxxxxxxxxxxxxx
------- Comment #2 from gareth@xxxxxxxxxxxxxx 2006-07-14 17:15 -------
So one easy fix is to change a single asm file. The file is
xen-3.0.2-2/linux-2.6-xen-sparse/arch/x86_64/kernel/entry-xen.S
and you insert three lines near the bottom of the error_entry function:
(obviously not including the <--- line bit)
...
/*
* Exception entry point. This expects an error code/orig_rax on the stack
* and the exception handler in %rax.
*/
ENTRY(error_entry)
_frame RDI
/* rdi slot contains rax, oldrax contains error code */
cld
subq $14*8,%rsp
CFI_ADJUST_CFA_OFFSET (14*8)
movq %rsi,13*8(%rsp)
CFI_REL_OFFSET rsi,RSI
movq 14*8(%rsp),%rsi /* load rax from rdi slot */
movq %rdx,12*8(%rsp)
CFI_REL_OFFSET rdx,RDX
movq %rcx,11*8(%rsp)
CFI_REL_OFFSET rcx,RCX
movq %rsi,10*8(%rsp) /* store rax */
CFI_REL_OFFSET rax,RAX
movq %r8, 9*8(%rsp)
CFI_REL_OFFSET r8,R8
movq %r9, 8*8(%rsp)
CFI_REL_OFFSET r9,R9
movq %r10,7*8(%rsp)
CFI_REL_OFFSET r10,R10
movq %r11,6*8(%rsp)
CFI_REL_OFFSET r11,R11
movq %rbx,5*8(%rsp)
CFI_REL_OFFSET rbx,RBX
movq %rbp,4*8(%rsp)
CFI_REL_OFFSET rbp,RBP
movq %r12,3*8(%rsp)
CFI_REL_OFFSET r12,R12
movq %r13,2*8(%rsp)
CFI_REL_OFFSET r13,R13
movq %r14,1*8(%rsp)
CFI_REL_OFFSET r14,R14
movq %r15,(%rsp)
CFI_REL_OFFSET r15,R15
#if 0
cmpl $__KERNEL_CS,CS(%rsp)
je error_kernelspace
#endif
pushf <-- line 1
andl $0xfffbffff, 0(%rsp) <---- line 2
popf <--- line3
error_call_handler:
...
--
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