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62873796c4
high level summary of the files:
* debug_rdata - get current state from debug registers. Helpful
when developing the debugger, and could serve some purpose in the
future.
* eudb - the debugger itself
* eviction_macro - generate the proper macro to flush the EU render
cache until I get control flow working
* pre_cpp - an evaluating c preprocesser like thing, to be used before
cpp
* sr - the system routine, exception handler which runs on the EU
* test - a very basic test system routine
* debug.h
65 lines
2.2 KiB
Plaintext
65 lines
2.2 KiB
Plaintext
/*
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* Copyright © 2011 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors:
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* Ben Widawsky <ben@bwidawsk.net>
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*
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*/
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#include "debug.h"
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#define CR0_0_ME_STATE_CTRL (1 << 31)
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#define CR0_0_BP_SUPPRESS (1 << 15)
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#define CR0_0_SPF_EN (1 << 2)
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#define CR0_0_ACC_DIS (1 << 1)
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#define CR0_1_BES_CTRL (1 << 31)
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#define CR0_1_HALT_CTRL (1 << 30)
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#define CR0_1_SOFT_EXCEPTION_CTRL (1 << 29)
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#define CR0_1_ILLGL_OP_STS (1 << 28)
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#define CR0_1_STACK_OVRFLW_STS (1 << 27)
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#define CR0_0_ENTRY_UNMASK (CR0_0_SPF_EN | CR0_0_ACC_DIS)
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// TODO: Need to fix this for non breakpoint case
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#define CR0_1_ENTRY_UNMASK ~(CR0_1_BES_CTRL)
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#define CR0_0_RETURN_MASK ~(CR0_0_ME_STATE_CTRL | CR0_0_SPF_EN | CR0_0_ACC_DIS)
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#ifndef SANDYBRIDGE
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#error Only SandyBridge is supported
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#endif
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/* Default flags for an instruction */
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#define FLAGS { ALIGN1, SWITCH, MASK_DISABLE, ACCWRCTRL}
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Enter:
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nop;
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or (1) cr0.0 cr0.0 CR0_0_ENTRY_UNMASK:ud FLAGS;
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/* Clear breakpoint status */
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and (1) cr0.1 cr0.1 CR0_1_ENTRY_UNMASK:ud FLAGS;
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/* set breakpoint suppress this should be conditional on bes */
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or (1) cr0.0 cr0.0 CR0_0_BP_SUPPRESS:ud FLAGS;
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and (1) cr0.0 cr0.0 CR0_0_RETURN_MASK:ud FLAGS;
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nop;
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