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/*
* Copyright © 2011 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* Authors:
* Ben Widawsky <ben@bwidawsk.net>
*
*/
#include "debug.h"
#define CR0_0_ME_STATE_CTRL (1 << 31)
#define CR0_0_BP_SUPPRESS (1 << 15)
#define CR0_0_SPF_EN (1 << 2)
#define CR0_0_ACC_DIS (1 << 1)
#define CR0_1_BES_CTRL (1 << 31)
#define CR0_1_HALT_CTRL (1 << 30)
#define CR0_1_SOFT_EXCEPTION_CTRL (1 << 29)
#define CR0_1_ILLGL_OP_STS (1 << 28)
#define CR0_1_STACK_OVRFLW_STS (1 << 27)
#define CR0_0_ENTRY_UNMASK (CR0_0_SPF_EN | CR0_0_ACC_DIS)
// TODO: Need to fix this for non breakpoint case
#define CR0_1_ENTRY_UNMASK ~(CR0_1_BES_CTRL)
#define CR0_0_RETURN_MASK ~(CR0_0_ME_STATE_CTRL | CR0_0_SPF_EN | CR0_0_ACC_DIS)
#ifndef SANDYBRIDGE
#error Only SandyBridge is supported
#endif
/* Default flags for an instruction */
#define FLAGS { ALIGN1, SWITCH, MASK_DISABLE, ACCWRCTRL}
Enter:
nop;
or (1) cr0.0 cr0.0 CR0_0_ENTRY_UNMASK:ud FLAGS;
/* Clear breakpoint status */
and (1) cr0.1 cr0.1 CR0_1_ENTRY_UNMASK:ud FLAGS;
/* set breakpoint suppress this should be conditional on bes */
or (1) cr0.0 cr0.0 CR0_0_BP_SUPPRESS:ud FLAGS;
and (1) cr0.0 cr0.0 CR0_0_RETURN_MASK:ud FLAGS;
nop;
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