168 lines
5.7 KiB
ArmAsm
168 lines
5.7 KiB
ArmAsm
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// TITLE("PspGetSetContextSpecialAPC")
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//++
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//
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// Copyright (c) 1994 IBM Corporation
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//
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// Module Name:
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//
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// psapcppc.s
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//
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// Abstract:
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//
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// Since APCs are implemented in software on the PowerPC, it is possible
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// that all the non-volatile registers are not restored prior to returning
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// to user mode. This procedure saves and restores all non-volatiles to
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// ensure that the full context (set via the PspGetSetContextSpecialAPC)
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// is returned to the thread.
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//
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// Author:
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//
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// Chuck Bauman 26-Sep-1994
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//
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// Environment:
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//
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// Kernel mode.
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//
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// Revision History:
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//
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//--
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#include "ksppc.h"
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//++
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//
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// VOID
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// PspGetSetContextSpecialAPC(
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// IN PKAPC Apc,
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// IN PKNORMAL_ROUTINE *NormalRoutine,
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// IN PVOID *NormalContext,
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// IN PVOID *SystemArgument1,
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// IN PVOID *SystemArgument2
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// )
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//
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// Routine Description:
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//
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// Ensure that all non-volatiles are stored on the kernel mode stack
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// so that the normal save/restore prologue/epilogue code restores
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// the entire context after the set context APC prior to returning.
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//
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// Arguments:
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//
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// Apc (r.3) - Supplies a pointer to the APC control object that caused entry
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// into this routine.
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//
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// NormalRoutine (r.4) - Supplies a pointer to the normal routine function
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// that was specified when the APC was initialized. This parameter is not
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// used.
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//
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// NormalContext (r.5) - Supplies a pointer to an arbitrary data structure
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// that was specified when the APC was initialized. This parameter is not
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// used.
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//
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// SystemArgument1, SystemArgument2 (r.6,r.7) - Supplies a set of two
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// pointer arguments that contain untyped data. These parameters
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// are not used.
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//
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// Return Value:
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//
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// None.
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//
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//--
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.extern ..PspGetSetContextApc
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.struct 0
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.space STK_MIN_FRAME
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Lr: .space 4
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.align 3
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ApcEx: .space ExceptionFrameLength
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.align 3
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ApcFrameLen:
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SPECIAL_ENTRY(PspGetSetContextSpecialApc)
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mflr r.0
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stwu r.sp, -ApcFrameLen(r.sp) // buy stack frame
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stw r.14, ApcEx + ExGpr14 (r.sp) // Store non-volatile GPRs
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stw r.15, ApcEx + ExGpr15 (r.sp)
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stw r.16, ApcEx + ExGpr16 (r.sp)
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stw r.17, ApcEx + ExGpr17 (r.sp)
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stw r.18, ApcEx + ExGpr18 (r.sp)
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stw r.19, ApcEx + ExGpr19 (r.sp)
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stw r.20, ApcEx + ExGpr20 (r.sp)
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stw r.21, ApcEx + ExGpr21 (r.sp)
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stw r.22, ApcEx + ExGpr22 (r.sp)
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stw r.23, ApcEx + ExGpr23 (r.sp)
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stw r.24, ApcEx + ExGpr24 (r.sp)
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stw r.25, ApcEx + ExGpr25 (r.sp)
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stw r.26, ApcEx + ExGpr26 (r.sp)
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stw r.27, ApcEx + ExGpr27 (r.sp)
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stw r.28, ApcEx + ExGpr28 (r.sp)
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stw r.29, ApcEx + ExGpr29 (r.sp)
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stw r.30, ApcEx + ExGpr30 (r.sp)
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stw r.31, ApcEx + ExGpr31 (r.sp)
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stfd f.14, ApcEx + ExFpr14 (r.sp) // Store non-volatile FPRs
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stfd f.15, ApcEx + ExFpr15 (r.sp)
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stfd f.16, ApcEx + ExFpr16 (r.sp)
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stfd f.17, ApcEx + ExFpr17 (r.sp)
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stfd f.18, ApcEx + ExFpr18 (r.sp)
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stfd f.19, ApcEx + ExFpr19 (r.sp)
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stfd f.20, ApcEx + ExFpr20 (r.sp)
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stfd f.21, ApcEx + ExFpr21 (r.sp)
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stfd f.22, ApcEx + ExFpr22 (r.sp)
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stfd f.23, ApcEx + ExFpr23 (r.sp)
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stfd f.24, ApcEx + ExFpr24 (r.sp)
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stfd f.25, ApcEx + ExFpr25 (r.sp)
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stfd f.26, ApcEx + ExFpr26 (r.sp)
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stfd f.27, ApcEx + ExFpr27 (r.sp)
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stfd f.28, ApcEx + ExFpr28 (r.sp)
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stfd f.29, ApcEx + ExFpr29 (r.sp)
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stfd f.30, ApcEx + ExFpr30 (r.sp)
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stfd f.31, ApcEx + ExFpr31 (r.sp)
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stw r.0, Lr (r.sp) // save return address
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PROLOGUE_END(PspGetSetContextSpecialApc)
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bl ..PspGetSetContextApc
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lwz r.0, Lr (r.sp) // restore the return address
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lwz r.14, ApcEx + ExGpr14 (r.sp) // Store non-volatile GPRs
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lwz r.15, ApcEx + ExGpr15 (r.sp)
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lwz r.16, ApcEx + ExGpr16 (r.sp)
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lwz r.17, ApcEx + ExGpr17 (r.sp)
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lwz r.18, ApcEx + ExGpr18 (r.sp)
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lwz r.19, ApcEx + ExGpr19 (r.sp)
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lwz r.20, ApcEx + ExGpr20 (r.sp)
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lwz r.21, ApcEx + ExGpr21 (r.sp)
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lwz r.22, ApcEx + ExGpr22 (r.sp)
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lwz r.23, ApcEx + ExGpr23 (r.sp)
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lwz r.24, ApcEx + ExGpr24 (r.sp)
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lwz r.25, ApcEx + ExGpr25 (r.sp)
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lwz r.26, ApcEx + ExGpr26 (r.sp)
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lwz r.27, ApcEx + ExGpr27 (r.sp)
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lwz r.28, ApcEx + ExGpr28 (r.sp)
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lwz r.29, ApcEx + ExGpr29 (r.sp)
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lwz r.30, ApcEx + ExGpr30 (r.sp)
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lwz r.31, ApcEx + ExGpr31 (r.sp)
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mtlr r.0
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lfd f.14, ApcEx + ExFpr14 (r.sp) // Store non-volatile FPRs
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lfd f.15, ApcEx + ExFpr15 (r.sp)
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lfd f.16, ApcEx + ExFpr16 (r.sp)
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lfd f.17, ApcEx + ExFpr17 (r.sp)
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lfd f.18, ApcEx + ExFpr18 (r.sp)
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lfd f.19, ApcEx + ExFpr19 (r.sp)
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lfd f.20, ApcEx + ExFpr20 (r.sp)
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lfd f.21, ApcEx + ExFpr21 (r.sp)
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lfd f.22, ApcEx + ExFpr22 (r.sp)
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lfd f.23, ApcEx + ExFpr23 (r.sp)
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lfd f.24, ApcEx + ExFpr24 (r.sp)
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lfd f.25, ApcEx + ExFpr25 (r.sp)
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lfd f.26, ApcEx + ExFpr26 (r.sp)
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lfd f.27, ApcEx + ExFpr27 (r.sp)
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lfd f.28, ApcEx + ExFpr28 (r.sp)
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lfd f.29, ApcEx + ExFpr29 (r.sp)
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lfd f.30, ApcEx + ExFpr30 (r.sp)
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lfd f.31, ApcEx + ExFpr31 (r.sp)
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addi r.sp, r.sp, ApcFrameLen
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SPECIAL_EXIT(PspGetSetContextSpecialApc)
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