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minor tweak to 64 bit stack push to ignore segmentation checks. Not required in 64 bit mode so is

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a minor optimization.  Also in transition from compat mode to 64 bit mode (e.g. interrupt to inner
privelege with mode change), SS may not be properly defined - this avoids other messiness.
This commit is contained in:
Peter Tattam 2003-02-26 00:59:31 +00:00
parent 131bbb54c5
commit 0f94706c80
1 changed files with 3 additions and 1 deletions
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4
bochs/cpu/stack_pro.cc
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@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
// $Id: stack_pro.cc,v 1.12 2002-11-07 15:42:14 shap Exp $
// $Id: stack_pro.cc,v 1.13 2003-02-26 00:59:31 ptrumpet Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2001 MandrakeSoft S.A.
@ -137,10 +137,12 @@ BailBigRSP("push_32");
BX_CPU_C::push_64(Bit64u value64)
{
/* 64bit stack size: pushes use SS:RSP, assume protected mode */
#if BX_IGNORE_THIS
if (!can_push(&BX_CPU_THIS_PTR sregs[BX_SEG_REG_SS].cache, RSP, 8)) {
BX_INFO(("push_64(): push outside stack limits"));
exception(BX_SS_EXCEPTION, 0, 0); /* #SS(0) */
}
#endif
write_virtual_qword(BX_SEG_REG_SS, RSP-8, &value64);
RSP -= 8;