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| author | Steve Reinhardt <stever@eecs.umich.edu> | 2003-12-09 14:19:35 -0800 |
|---|---|---|
| committer | Steve Reinhardt <stever@eecs.umich.edu> | 2003-12-09 14:19:35 -0800 |
| commit | f13509e96803ab87e33c2c4f6277a29528012b9e (patch) | |
| tree | f5bc91f88408e8c431ec4778f310891c825e3ac3 | |
| parent | 37a718e45e9bb1d841c6c5d1b428461819f18a74 (diff) | |
| download | gem5-f13509e96803ab87e33c2c4f6277a29528012b9e.tar.xz | |
Generate a fault when a privileged PAL call is
executed in non-privileged (non-PAL) mode.
--HG--
extra : convert_revision : c8823a1eec27d801a1ed6110ade07354c4dd2a32
| -rw-r--r-- | arch/alpha/isa_desc | 29 |
1 files changed, 18 insertions, 11 deletions
diff --git a/arch/alpha/isa_desc b/arch/alpha/isa_desc index e3b8cf01b..aef9135d3 100644 --- a/arch/alpha/isa_desc +++ b/arch/alpha/isa_desc @@ -1399,6 +1399,7 @@ declare {{ protected: int palFunc; ///< Function code part of instruction int palOffset; ///< Target PC, offset from IPR_PAL_BASE + bool palPriv; ///< is this call privileged? /// Constructor. CallPalBase(const char *mnem, MachInst _machInst, @@ -1406,7 +1407,7 @@ declare {{ : AlphaStaticInst(mnem, _machInst, __opClass), palFunc(PALFUNC) { - int palPriv = ((machInst & 0x80) != 0); + palPriv = ((machInst & 0x80) != 0); int shortPalFunc = (machInst & 0x3f); palOffset = 0x2001 + (palPriv << 12) + (shortPalFunc << 6); } @@ -2352,20 +2353,26 @@ decode OPCODE default Unknown::unknown() { #ifdef FULL_SYSTEM 0x00: CallPal::call_pal({{ - // check to see if simulator wants to do something special - // on this PAL call (including maybe suppress it) - bool dopal = xc->simPalCheck(palFunc); - - if (!xc->misspeculating()) { - Annotate::Callpal(xc, palFunc); + 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 + // on this PAL call (including maybe suppress it) + bool dopal = xc->simPalCheck(palFunc); - if (dopal) { if (!xc->misspeculating()) { - AlphaISA::swap_palshadow(&xc->regs, true); + Annotate::Callpal(xc, palFunc); + } + + if (dopal) { + if (!xc->misspeculating()) { + AlphaISA::swap_palshadow(&xc->regs, true); + } + xc->setIpr(AlphaISA::IPR_EXC_ADDR, NPC); + NPC = xc->readIpr(AlphaISA::IPR_PAL_BASE, fault) + palOffset; } - xc->setIpr(AlphaISA::IPR_EXC_ADDR, NPC); - NPC = xc->readIpr(AlphaISA::IPR_PAL_BASE, fault) + palOffset; } }}); #else |