romutil.py (6048:65a321a3a691) romutil.py (6057:882f1b921de7)
1# Copyright (c) 2008 The Regents of The University of Michigan
2# All rights reserved.
3#
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions are
6# met: redistributions of source code must retain the above copyright
7# notice, this list of conditions and the following disclaimer;
8# redistributions in binary form must reproduce the above copyright

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79 srli t10, t10, 3, dataSize=8
80 andi t10, t10, 3, dataSize=8
81 rdattr t5, cs, dataSize=8
82 srli t5, t5, 3, dataSize=8
83 andi t5, t5, 0x3, dataSize=8
84 sub t0, t5, t10, flags=(EZF,), dataSize=8
85 # We're going to change priviledge, so zero out the stack selector. We
86 # need to let the IST have priority so we don't branch yet.
1# Copyright (c) 2008 The Regents of The University of Michigan
2# All rights reserved.
3#
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions are
6# met: redistributions of source code must retain the above copyright
7# notice, this list of conditions and the following disclaimer;
8# redistributions in binary form must reproduce the above copyright

--- 70 unchanged lines hidden (view full) ---

79 srli t10, t10, 3, dataSize=8
80 andi t10, t10, 3, dataSize=8
81 rdattr t5, cs, dataSize=8
82 srli t5, t5, 3, dataSize=8
83 andi t5, t5, 0x3, dataSize=8
84 sub t0, t5, t10, flags=(EZF,), dataSize=8
85 # We're going to change priviledge, so zero out the stack selector. We
86 # need to let the IST have priority so we don't branch yet.
87 wrsel t11, t0, flags=(nCEZF,)
87 mov t11, t0, t0, flags=(nCEZF,)
88
89 # Check the IST field of the gate descriptor
90 srli t12, t4, 32, dataSize=8
91 andi t12, t12, 0x7, dataSize=8
92 subi t0, t12, 1, flags=(ECF,), dataSize=8
93 br rom_local_label("%(startLabel)s_istStackSwitch"), flags=(nCECF,)
94 br rom_local_label("%(startLabel)s_cplStackSwitch"), flags=(nCEZF,)
95

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89 # Check the IST field of the gate descriptor
90 srli t12, t4, 32, dataSize=8
91 andi t12, t12, 0x7, dataSize=8
92 subi t0, t12, 1, flags=(ECF,), dataSize=8
93 br rom_local_label("%(startLabel)s_istStackSwitch"), flags=(nCECF,)
94 br rom_local_label("%(startLabel)s_cplStackSwitch"), flags=(nCEZF,)
95

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