103 lines
2.1 KiB
ArmAsm
103 lines
2.1 KiB
ArmAsm
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/**
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*** Copyright (C) 1996-97 Intel Corporation. All rights reserved.
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***
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*** The information and source code contained herein is the exclusive
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*** property of Intel Corporation and may not be disclosed, examined
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*** or reproduced in whole or in part without explicit written authorization
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*** from the company.
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**/
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//++
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//
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// Module Name:
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//
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// setjmpex.s
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//
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// Abstract:
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//
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// This module implements the IA64 specific routine to perform a setjmp.
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//
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// N.B. This module has two entry points that provide SAFE and UNSAFE
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// handling of setjmp.
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//
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// Author:
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//
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// William K. Cheung (wcheung) 27-Jan-1996
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//
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// Environment:
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//
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// Any mode.
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//
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// Revision History:
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//
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// Modified to support mixed ISA.
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//
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//--
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#include "ksia64.h"
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.global _setjmpex
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.type _setjmpex, @function
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.global _setjmp_common
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.type _setjmp_common, @function
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.sdata
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.align 8
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_setjmpexused::
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data8 _setjmpex
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//++
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//
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// int
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// setjmpex (
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// IN jmp_buf JumpBuffer
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// )
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//
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// Routine Description:
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//
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// This function saved the current nonvolatile register state in the
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// specified jump buffer and returns a function vlaue of zero.
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//
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// Arguments:
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//
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// JumpBuffer (a0) - Supplies the address of a jump buffer to store the
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// jump information.
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//
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// MemoryStackFp (a1) - Supplies the memory stack frame pointer (psp)
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// of the caller. It's an optional argument.
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//
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// Return Value:
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//
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// A value of zero is returned.
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//
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//--
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NESTED_ENTRY(_setjmpex)
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LEAF_SETUP(3, 0, 0, 0)
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rUnat = t8
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rFpsr = t9
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rPsp = a1
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rBsp = a2
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movl t4 = 0x130324356 // ascii code of "VC20"
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mov rUnat = ar.unat
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mov rFpsr = ar.fpsr
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add t2 = JbCookie, a0
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;;
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st8.nta [t2] = t4, JbUnwindData-JbCookie // save the magic cookie
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add t3 = JbUnwindData+8, a0
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;;
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st8.nta [t2] = rPsp, 8
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st8.nta [t3] = rBsp
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br.sptk.many _setjmp_common
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;;
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NESTED_EXIT(_setjmpex)
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