30 lines
611 B
ArmAsm
30 lines
611 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
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.globl utrap_trap
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.type utrap_trap,#function
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utrap_trap: /* %g3=handler,%g4=level */
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TRAP_LOAD_THREAD_REG(%g6, %g1)
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ldx [%g6 + TI_UTRAPS], %g1
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brnz,pt %g1, invoke_utrap
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nop
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ba,pt %xcc, etrap
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rd %pc, %g7
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mov %l4, %o1
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call bad_trap
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add %sp, PTREGS_OFF, %o0
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ba,a,pt %xcc, rtrap
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invoke_utrap:
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sllx %g3, 3, %g3
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ldx [%g1 + %g3], %g1
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save %sp, -128, %sp
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rdpr %tstate, %l6
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rdpr %cwp, %l7
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andn %l6, TSTATE_CWP, %l6
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wrpr %l6, %l7, %tstate
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rdpr %tpc, %l6
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rdpr %tnpc, %l7
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wrpr %g1, 0, %tnpc
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done
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.size utrap_trap,.-utrap_trap
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