diff options
Diffstat (limited to 'src/arch/sparc/process.cc')
| -rw-r--r-- | src/arch/sparc/process.cc | 106 |
1 files changed, 101 insertions, 5 deletions
diff --git a/src/arch/sparc/process.cc b/src/arch/sparc/process.cc index 3323ba7a0..a3b7dde7c 100644 --- a/src/arch/sparc/process.cc +++ b/src/arch/sparc/process.cc @@ -66,6 +66,10 @@ SparcLiveProcess::SparcLiveProcess(const std::string &nm, ObjectFile *objFile, // Set pointer for next thread stack. Reserve 8M for main stack. next_thread_stack_base = stack_base - (8 * 1024 * 1024); + + //Initialize these to 0s + fillStart = 0; + spillStart = 0; } void @@ -88,15 +92,19 @@ SparcLiveProcess::startup() */ //No windows contain info from other programs - threadContexts[0]->setMiscRegWithEffect(MISCREG_OTHERWIN, 0); + threadContexts[0]->setMiscReg(MISCREG_OTHERWIN, 0); //There are no windows to pop - threadContexts[0]->setMiscRegWithEffect(MISCREG_CANRESTORE, 0); + threadContexts[0]->setMiscReg(MISCREG_CANRESTORE, 0); //All windows are available to save into - threadContexts[0]->setMiscRegWithEffect(MISCREG_CANSAVE, NWindows - 2); + threadContexts[0]->setMiscReg(MISCREG_CANSAVE, NWindows - 2); //All windows are "clean" - threadContexts[0]->setMiscRegWithEffect(MISCREG_CLEANWIN, NWindows); + threadContexts[0]->setMiscReg(MISCREG_CLEANWIN, NWindows); //Start with register window 0 - threadContexts[0]->setMiscRegWithEffect(MISCREG_CWP, 0); + threadContexts[0]->setMiscReg(MISCREG_CWP, 0); + //Always use spill and fill traps 0 + threadContexts[0]->setMiscReg(MISCREG_WSTATE, 0); + //Set the trap level to 0 + threadContexts[0]->setMiscReg(MISCREG_TL, 0); } m5_auxv_t buildAuxVect(int64_t type, int64_t val) @@ -107,6 +115,83 @@ m5_auxv_t buildAuxVect(int64_t type, int64_t val) return result; } +//We only use 19 instructions for the trap handlers, but there would be +//space for 32 in a real SPARC trap table. +const int numFillInsts = 32; +const int numSpillInsts = 32; + +MachInst fillHandler[numFillInsts] = +{ + htog(0x87802018), //wr %g0, ASI_AIUP, %asi + htog(0xe0dba7ff), //ldxa [%sp + BIAS + (0*8)] %asi, %l0 + htog(0xe2dba807), //ldxa [%sp + BIAS + (1*8)] %asi, %l1 + htog(0xe4dba80f), //ldxa [%sp + BIAS + (2*8)] %asi, %l2 + htog(0xe6dba817), //ldxa [%sp + BIAS + (3*8)] %asi, %l3 + htog(0xe8dba81f), //ldxa [%sp + BIAS + (4*8)] %asi, %l4 + htog(0xeadba827), //ldxa [%sp + BIAS + (5*8)] %asi, %l5 + htog(0xecdba82f), //ldxa [%sp + BIAS + (6*8)] %asi, %l6 + htog(0xeedba837), //ldxa [%sp + BIAS + (7*8)] %asi, %l7 + htog(0xf0dba83f), //ldxa [%sp + BIAS + (8*8)] %asi, %i0 + htog(0xf2dba847), //ldxa [%sp + BIAS + (9*8)] %asi, %i1 + htog(0xf4dba84f), //ldxa [%sp + BIAS + (10*8)] %asi, %i2 + htog(0xf6dba857), //ldxa [%sp + BIAS + (11*8)] %asi, %i3 + htog(0xf8dba85f), //ldxa [%sp + BIAS + (12*8)] %asi, %i4 + htog(0xfadba867), //ldxa [%sp + BIAS + (13*8)] %asi, %i5 + htog(0xfcdba86f), //ldxa [%sp + BIAS + (14*8)] %asi, %i6 + htog(0xfedba877), //ldxa [%sp + BIAS + (15*8)] %asi, %i7 + htog(0x83880000), //restored + htog(0x83F00000), //retry + htog(0x00000000), //illtrap + htog(0x00000000), //illtrap + htog(0x00000000), //illtrap + htog(0x00000000), //illtrap + htog(0x00000000), //illtrap + htog(0x00000000), //illtrap + htog(0x00000000), //illtrap + htog(0x00000000), //illtrap + htog(0x00000000), //illtrap + htog(0x00000000), //illtrap + htog(0x00000000), //illtrap + htog(0x00000000), //illtrap + htog(0x00000000) //illtrap +}; + +MachInst spillHandler[numSpillInsts] = +{ + htog(0x87802018), //wr %g0, ASI_AIUP, %asi + htog(0xe0f3a7ff), //stxa %l0, [%sp + BIAS + (0*8)] %asi + htog(0xe2f3a807), //stxa %l1, [%sp + BIAS + (1*8)] %asi + htog(0xe4f3a80f), //stxa %l2, [%sp + BIAS + (2*8)] %asi + htog(0xe6f3a817), //stxa %l3, [%sp + BIAS + (3*8)] %asi + htog(0xe8f3a81f), //stxa %l4, [%sp + BIAS + (4*8)] %asi + htog(0xeaf3a827), //stxa %l5, [%sp + BIAS + (5*8)] %asi + htog(0xecf3a82f), //stxa %l6, [%sp + BIAS + (6*8)] %asi + htog(0xeef3a837), //stxa %l7, [%sp + BIAS + (7*8)] %asi + htog(0xf0f3a83f), //stxa %i0, [%sp + BIAS + (8*8)] %asi + htog(0xf2f3a847), //stxa %i1, [%sp + BIAS + (9*8)] %asi + htog(0xf4f3a84f), //stxa %i2, [%sp + BIAS + (10*8)] %asi + htog(0xf6f3a857), //stxa %i3, [%sp + BIAS + (11*8)] %asi + htog(0xf8f3a85f), //stxa %i4, [%sp + BIAS + (12*8)] %asi + htog(0xfaf3a867), //stxa %i5, [%sp + BIAS + (13*8)] %asi + htog(0xfcf3a86f), //stxa %i6, [%sp + BIAS + (14*8)] %asi + htog(0xfef3a877), //stxa %i7, [%sp + BIAS + (15*8)] %asi + htog(0x81880000), //saved + htog(0x83F00000), //retry + htog(0x00000000), //illtrap + htog(0x00000000), //illtrap + htog(0x00000000), //illtrap + htog(0x00000000), //illtrap + htog(0x00000000), //illtrap + htog(0x00000000), //illtrap + htog(0x00000000), //illtrap + htog(0x00000000), //illtrap + htog(0x00000000), //illtrap + htog(0x00000000), //illtrap + htog(0x00000000), //illtrap + htog(0x00000000), //illtrap + htog(0x00000000) //illtrap +}; + void SparcLiveProcess::argsInit(int intSize, int pageSize) { @@ -317,6 +402,17 @@ SparcLiveProcess::argsInit(int intSize, int pageSize) initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize); + //Stuff the trap handlers into the processes address space. + //Since the stack grows down and is the highest area in the processes + //address space, we can put stuff above it and stay out of the way. + int fillSize = sizeof(MachInst) * numFillInsts; + int spillSize = sizeof(MachInst) * numSpillInsts; + fillStart = stack_base; + spillStart = fillStart + fillSize; + initVirtMem->writeBlob(fillStart, (uint8_t*)fillHandler, fillSize); + initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler, spillSize); + + //Set up the thread context to start running the process threadContexts[0]->setIntReg(ArgumentReg0, argc); threadContexts[0]->setIntReg(ArgumentReg1, argv_array_base); threadContexts[0]->setIntReg(StackPointerReg, stack_min - StackBias); |