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Generate a fault when a privileged PAL call is

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executed in non-privileged (non-PAL) mode.

--HG--
extra : convert_revision : c8823a1eec27d801a1ed6110ade07354c4dd2a32
This commit is contained in:
Steve Reinhardt 2003-12-09 14:19:35 -08:00
parent 37a718e45e
commit f13509e968
1 changed files with 18 additions and 11 deletions
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9
arch/alpha/isa_desc
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@ -1399,6 +1399,7 @@ declare {{
protected: protected:
int palFunc; ///< Function code part of instruction int palFunc; ///< Function code part of instruction
int palOffset; ///< Target PC, offset from IPR_PAL_BASE int palOffset; ///< Target PC, offset from IPR_PAL_BASE
bool palPriv; ///< is this call privileged?
/// Constructor. /// Constructor.
CallPalBase(const char *mnem, MachInst _machInst, CallPalBase(const char *mnem, MachInst _machInst,
@ -1406,7 +1407,7 @@ declare {{
: AlphaStaticInst(mnem, _machInst, __opClass), : AlphaStaticInst(mnem, _machInst, __opClass),
palFunc(PALFUNC) palFunc(PALFUNC)
{ {
int palPriv = ((machInst & 0x80) != 0); palPriv = ((machInst & 0x80) != 0);
int shortPalFunc = (machInst & 0x3f); int shortPalFunc = (machInst & 0x3f);
palOffset = 0x2001 + (palPriv << 12) + (shortPalFunc << 6); palOffset = 0x2001 + (palPriv << 12) + (shortPalFunc << 6);
} }
@ -2352,6 +2353,11 @@ decode OPCODE default Unknown::unknown() {
#ifdef FULL_SYSTEM #ifdef FULL_SYSTEM
0x00: CallPal::call_pal({{ 0x00: CallPal::call_pal({{
if (palPriv && !PC_PAL(xc->regs.pc)) {
// attempt to do privileged PAL call in non-PAL mode
fault = Unimplemented_Opcode_Fault;
}
else {
// check to see if simulator wants to do something special // check to see if simulator wants to do something special
// on this PAL call (including maybe suppress it) // on this PAL call (including maybe suppress it)
bool dopal = xc->simPalCheck(palFunc); bool dopal = xc->simPalCheck(palFunc);
@ -2367,6 +2373,7 @@ decode OPCODE default Unknown::unknown() {
xc->setIpr(AlphaISA::IPR_EXC_ADDR, NPC); xc->setIpr(AlphaISA::IPR_EXC_ADDR, NPC);
NPC = xc->readIpr(AlphaISA::IPR_PAL_BASE, fault) + palOffset; NPC = xc->readIpr(AlphaISA::IPR_PAL_BASE, fault) + palOffset;
} }
}
}}); }});
#else #else
0x00: decode PALFUNC { 0x00: decode PALFUNC {