103 lines
2.5 KiB
NASM
103 lines
2.5 KiB
NASM
title "Set Jump Buffer"
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;++
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;
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; Copyright (c) 2000 Microsoft Corporation
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;
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; Module Name:
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;
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; setjmpex.asm
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;
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; Abstract:
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;
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; This module implements the AMD64 specific routine to perform safe set
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; jump.
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;
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; Author:
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;
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; David N. Cutler (davec) 3-Nov-2000
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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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;--
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include ksamd64.inc
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;
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; Define variable that will cause setjmp/longjmp to be safe or unsafe with
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; respect to structured exception handling.
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;
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_setjmp_ segment para common 'DATA'
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dq _setjmpex ;
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_setjmp_ ends
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subttl "Safe Set Jump"
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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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; IN ULONG64 FrameBase
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; )
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;
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; Routine Description:
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;
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; This function saves 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 (rcx) - Supplies a pointer to a jump buffer.
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;
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; FrameBase (rdx) - Supplies the base address of the caller frame.
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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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LEAF_ENTRY _setjmpex, _TEXT$00
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;
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; Save the nonvolatile register state so these registers to be restored to
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; their value at the call to setjmp. If these registers were not saved, then
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; they would be restored to their current value in the target function which
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; would be incorrect.
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;
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mov JbFrame[rcx], rdx ; set frame base
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mov JbRbx[rcx], rbx ; save nonvolatile integer registers
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mov JbRbp[rcx], rbp ;
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mov JbRsi[rcx], rsi ;
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mov JbRdi[rcx], rdi ;
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mov JbR12[rcx], r12 ;
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mov JbR13[rcx], r13 ;
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mov JbR14[rcx], r14 ;
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mov JbR15[rcx], r15 ;
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lea r8, 8[rsp] ; save caller stack pointer
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mov JbRsp[rcx], r8 ;
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mov r8, [rsp] ; save caller return address
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mov JbRip[rcx], r8 ;
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movdqa JbXmm6[rcx], xmm6 ; save nonvolatile floating registers
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movdqa JbXmm7[rcx], xmm7 ;
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movdqa JbXmm8[rcx], xmm8 ;
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movdqa JbXmm9[rcx], xmm9 ;
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movdqa JbXmm10[rcx], xmm10 ;
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movdqa JbXmm11[rcx], xmm11 ;
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movdqa JbXmm12[rcx], xmm12 ;
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movdqa JbXmm13[rcx], xmm13 ;
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movdqa JbXmm14[rcx], xmm14 ;
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movdqa JbXmm15[rcx], xmm15 ;
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xor eax, eax ; set return value
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ret ; return
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LEAF_END _setjmpex, _TEXT$00
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end
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