Changes in directory llvm/lib/Target/PowerPC:
PPCJITInfo.cpp updated: 1.28 -> 1.29
PPCMachOWriter.cpp updated: 1.3 -> 1.4
PPCRelocations.h updated: 1.9 -> 1.10
---
Log message:
First pass at supporting relocations. Relocations are written correctly to
the file now, however the relocated address is currently wrong. Fixing
that will require some deep pondering.
---
Diffs of the changes: (+437 -370)
PPCJITInfo.cpp | 703 ++++++++++++++++++++++++++---------------------------
PPCMachOWriter.cpp | 88 ++++++
PPCRelocations.h | 16 -
3 files changed, 437 insertions(+), 370 deletions(-)
Index: llvm/lib/Target/PowerPC/PPCJITInfo.cpp
diff -u llvm/lib/Target/PowerPC/PPCJITInfo.cpp:1.28
llvm/lib/Target/PowerPC/PPCJITInfo.cpp:1.29
--- llvm/lib/Target/PowerPC/PPCJITInfo.cpp:1.28 Mon Aug 28 21:30:59 2006
+++ llvm/lib/Target/PowerPC/PPCJITInfo.cpp Fri Sep 8 17:42:09 2006
@@ -1,353 +1,350 @@
-//===-- PPCJITInfo.cpp - Implement the JIT interfaces for the PowerPC
-----===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements the JIT interfaces for the 32-bit PowerPC target.
-//
-//===----------------------------------------------------------------------===//
-
-#define DEBUG_TYPE "jit"
-#include "PPCJITInfo.h"
-#include "PPCRelocations.h"
-#include "llvm/CodeGen/MachineCodeEmitter.h"
-#include "llvm/Config/alloca.h"
-#include "llvm/Support/Debug.h"
-#include <set>
-#include <iostream>
-using namespace llvm;
-
-static TargetJITInfo::JITCompilerFn JITCompilerFunction;
-
-#define BUILD_ADDIS(RD,RS,IMM16) \
- ((15 << 26) | ((RD) << 21) | ((RS) << 16) | ((IMM16) & 65535))
-#define BUILD_ORI(RD,RS,UIMM16) \
- ((24 << 26) | ((RS) << 21) | ((RD) << 16) | ((UIMM16) & 65535))
-#define BUILD_ORIS(RD,RS,UIMM16) \
- ((25 << 26) | ((RS) << 21) | ((RD) << 16) | ((UIMM16) & 65535))
-#define BUILD_RLDICR(RD,RS,SH,ME) \
- ((30 << 26) | ((RS) << 21) | ((RD) << 16) | (((SH) & 31) << 11) | \
- (((ME) & 63) << 6) | (1 << 3) | (((SH) >> 5) & 1))
-#define BUILD_MTSPR(RS,SPR) \
- ((31 << 26) | ((RS) << 21) | ((SPR) << 16) | (467 << 1))
-#define BUILD_BCCTRx(BO,BI,LINK) \
- ((19 << 26) | ((BO) << 21) | ((BI) << 16) | (528 << 1) | ((LINK) & 1))
-#define BUILD_B(TARGET, LINK) \
- ((18 << 26) | (((TARGET) & 0x00FFFFFF) << 2) | ((LINK) & 1))
-
-// Pseudo-ops
-#define BUILD_LIS(RD,IMM16) BUILD_ADDIS(RD,0,IMM16)
-#define BUILD_SLDI(RD,RS,IMM6) BUILD_RLDICR(RD,RS,IMM6,63-IMM6)
-#define BUILD_MTCTR(RS) BUILD_MTSPR(RS,9)
-#define BUILD_BCTR(LINK) BUILD_BCCTRx(20,0,LINK)
-
-static void EmitBranchToAt(uint64_t At, uint64_t To, bool isCall, bool
is64Bit){
- intptr_t Offset = ((intptr_t)To - (intptr_t)At) >> 2;
- unsigned *AtI = (unsigned*)(intptr_t)At;
-
- if (Offset >= -(1 << 23) && Offset < (1 << 23)) { // In range?
- AtI[0] = BUILD_B(Offset, isCall); // b/bl target
- } else if (!is64Bit) {
- AtI[0] = BUILD_LIS(12, To >> 16); // lis r12, hi16(address)
- AtI[1] = BUILD_ORI(12, 12, To); // ori r12, r12, lo16(address)
- AtI[2] = BUILD_MTCTR(12); // mtctr r12
- AtI[3] = BUILD_BCTR(isCall); // bctr/bctrl
- } else {
- AtI[0] = BUILD_LIS(12, To >> 48); // lis r12, hi16(address)
- AtI[1] = BUILD_ORI(12, 12, To >> 32); // ori r12, r12, lo16(address)
- AtI[2] = BUILD_SLDI(12, 12, 32); // sldi r12, r12, 32
- AtI[3] = BUILD_ORIS(12, 12, To >> 16); // oris r12, r12, hi16(address)
- AtI[4] = BUILD_ORI(12, 12, To); // ori r12, r12, lo16(address)
- AtI[5] = BUILD_MTCTR(12); // mtctr r12
- AtI[6] = BUILD_BCTR(isCall); // bctr/bctrl
- }
-}
-
-extern "C" void PPC32CompilationCallback();
-extern "C" void PPC64CompilationCallback();
-
-#if (defined(__POWERPC__) || defined (__ppc__) || defined(_POWER)) &&
!defined(__ppc64__)
-// CompilationCallback stub - We can't use a C function with inline assembly in
-// it, because we the prolog/epilog inserted by GCC won't work for us.
Instead,
-// write our own wrapper, which does things our way, so we have complete
control
-// over register saving and restoring.
-asm(
- ".text\n"
- ".align 2\n"
- ".globl _PPC32CompilationCallback\n"
-"_PPC32CompilationCallback:\n"
- // Make space for 8 ints r[3-10] and 13 doubles f[1-13] and the
- // FIXME: need to save v[0-19] for altivec?
- // FIXME: could shrink frame
- // Set up a proper stack frame
- "stwu r1, -208(r1)\n"
- "mflr r0\n"
- "stw r0, 216(r1)\n"
- // Save all int arg registers
- "stw r10, 204(r1)\n" "stw r9, 200(r1)\n"
- "stw r8, 196(r1)\n" "stw r7, 192(r1)\n"
- "stw r6, 188(r1)\n" "stw r5, 184(r1)\n"
- "stw r4, 180(r1)\n" "stw r3, 176(r1)\n"
- // Save all call-clobbered FP regs.
- "stfd f13, 168(r1)\n" "stfd f12, 160(r1)\n"
- "stfd f11, 152(r1)\n" "stfd f10, 144(r1)\n"
- "stfd f9, 136(r1)\n" "stfd f8, 128(r1)\n"
- "stfd f7, 120(r1)\n" "stfd f6, 112(r1)\n"
- "stfd f5, 104(r1)\n" "stfd f4, 96(r1)\n"
- "stfd f3, 88(r1)\n" "stfd f2, 80(r1)\n"
- "stfd f1, 72(r1)\n"
- // Arguments to Compilation Callback:
- // r3 - our lr (address of the call instruction in stub plus 4)
- // r4 - stub's lr (address of instruction that called the stub plus 4)
- "mr r3, r0\n"
- "lwz r2, 208(r1)\n" // stub's frame
- "lwz r4, 8(r2)\n" // stub's lr
- "li r5, 0\n" // 0 == 32 bit
- "bl _PPCCompilationCallbackC\n"
- "mtctr r3\n"
- // Restore all int arg registers
- "lwz r10, 204(r1)\n" "lwz r9, 200(r1)\n"
- "lwz r8, 196(r1)\n" "lwz r7, 192(r1)\n"
- "lwz r6, 188(r1)\n" "lwz r5, 184(r1)\n"
- "lwz r4, 180(r1)\n" "lwz r3, 176(r1)\n"
- // Restore all FP arg registers
- "lfd f13, 168(r1)\n" "lfd f12, 160(r1)\n"
- "lfd f11, 152(r1)\n" "lfd f10, 144(r1)\n"
- "lfd f9, 136(r1)\n" "lfd f8, 128(r1)\n"
- "lfd f7, 120(r1)\n" "lfd f6, 112(r1)\n"
- "lfd f5, 104(r1)\n" "lfd f4, 96(r1)\n"
- "lfd f3, 88(r1)\n" "lfd f2, 80(r1)\n"
- "lfd f1, 72(r1)\n"
- // Pop 3 frames off the stack and branch to target
- "lwz r1, 208(r1)\n"
- "lwz r2, 8(r1)\n"
- "mtlr r2\n"
- "bctr\n"
- );
-#else
-void PPC32CompilationCallback() {
- assert(0 && "This is not a power pc, you can't execute this!");
- abort();
-}
-#endif
-
-#if (defined(__POWERPC__) || defined (__ppc__) || defined(_POWER)) &&
defined(__ppc64__)
-asm(
- ".text\n"
- ".align 2\n"
- ".globl _PPC64CompilationCallback\n"
-"_PPC64CompilationCallback:\n"
- // Make space for 8 ints r[3-10] and 13 doubles f[1-13] and the
- // FIXME: need to save v[0-19] for altivec?
- // Set up a proper stack frame
- "stdu r1, -208(r1)\n"
- "mflr r0\n"
- "std r0, 224(r1)\n"
- // Save all int arg registers
- "std r10, 200(r1)\n" "std r9, 192(r1)\n"
- "std r8, 184(r1)\n" "std r7, 176(r1)\n"
- "std r6, 168(r1)\n" "std r5, 160(r1)\n"
- "std r4, 152(r1)\n" "std r3, 144(r1)\n"
- // Save all call-clobbered FP regs.
- "stfd f13, 136(r1)\n" "stfd f12, 128(r1)\n"
- "stfd f11, 120(r1)\n" "stfd f10, 112(r1)\n"
- "stfd f9, 104(r1)\n" "stfd f8, 96(r1)\n"
- "stfd f7, 88(r1)\n" "stfd f6, 80(r1)\n"
- "stfd f5, 72(r1)\n" "stfd f4, 64(r1)\n"
- "stfd f3, 56(r1)\n" "stfd f2, 48(r1)\n"
- "stfd f1, 40(r1)\n"
- // Arguments to Compilation Callback:
- // r3 - our lr (address of the call instruction in stub plus 4)
- // r4 - stub's lr (address of instruction that called the stub plus 4)
- "mr r3, r0\n"
- "ld r2, 208(r1)\n" // stub's frame
- "ld r4, 16(r2)\n" // stub's lr
- "li r5, 1\n" // 1 == 64 bit
- "bl _PPCCompilationCallbackC\n"
- "mtctr r3\n"
- // Restore all int arg registers
- "ld r10, 200(r1)\n" "ld r9, 192(r1)\n"
- "ld r8, 184(r1)\n" "ld r7, 176(r1)\n"
- "ld r6, 168(r1)\n" "ld r5, 160(r1)\n"
- "ld r4, 152(r1)\n" "ld r3, 144(r1)\n"
- // Restore all FP arg registers
- "lfd f13, 136(r1)\n" "lfd f12, 128(r1)\n"
- "lfd f11, 120(r1)\n" "lfd f10, 112(r1)\n"
- "lfd f9, 104(r1)\n" "lfd f8, 96(r1)\n"
- "lfd f7, 88(r1)\n" "lfd f6, 80(r1)\n"
- "lfd f5, 72(r1)\n" "lfd f4, 64(r1)\n"
- "lfd f3, 56(r1)\n" "lfd f2, 48(r1)\n"
- "lfd f1, 40(r1)\n"
- // Pop 3 frames off the stack and branch to target
- "ld r1, 208(r1)\n"
- "ld r2, 16(r1)\n"
- "mtlr r2\n"
- "bctr\n"
- );
-#else
-void PPC64CompilationCallback() {
- assert(0 && "This is not a power pc, you can't execute this!");
- abort();
-}
-#endif
-
-extern "C" void *PPCCompilationCallbackC(unsigned *StubCallAddrPlus4,
- unsigned *OrigCallAddrPlus4,
- bool is64Bit) {
- // Adjust the pointer to the address of the call instruction in the stub
- // emitted by emitFunctionStub, rather than the instruction after it.
- unsigned *StubCallAddr = StubCallAddrPlus4 - 1;
- unsigned *OrigCallAddr = OrigCallAddrPlus4 - 1;
-
- void *Target = JITCompilerFunction(StubCallAddr);
-
- // Check to see if *OrigCallAddr is a 'bl' instruction, and if we can rewrite
- // it to branch directly to the destination. If so, rewrite it so it does
not
- // need to go through the stub anymore.
- unsigned OrigCallInst = *OrigCallAddr;
- if ((OrigCallInst >> 26) == 18) { // Direct call.
- intptr_t Offset = ((intptr_t)Target - (intptr_t)OrigCallAddr) >> 2;
-
- if (Offset >= -(1 << 23) && Offset < (1 << 23)) { // In range?
- // Clear the original target out.
- OrigCallInst &= (63 << 26) | 3;
- // Fill in the new target.
- OrigCallInst |= (Offset & ((1 << 24)-1)) << 2;
- // Replace the call.
- *OrigCallAddr = OrigCallInst;
- }
- }
-
- // Assert that we are coming from a stub that was created with our
- // emitFunctionStub.
- if ((*StubCallAddr >> 26) == 18)
- StubCallAddr -= 3;
- else {
- assert((*StubCallAddr >> 26) == 19 && "Call in stub is not indirect!");
- StubCallAddr -= is64Bit ? 9 : 6;
- }
-
- // Rewrite the stub with an unconditional branch to the target, for any users
- // who took the address of the stub.
- EmitBranchToAt((intptr_t)StubCallAddr, (intptr_t)Target, false, is64Bit);
-
- // Put the address of the target function to call and the address to return
to
- // after calling the target function in a place that is easy to get on the
- // stack after we restore all regs.
- return Target;
-}
-
-
-
-TargetJITInfo::LazyResolverFn
-PPCJITInfo::getLazyResolverFunction(JITCompilerFn Fn) {
- JITCompilerFunction = Fn;
- return is64Bit ? PPC64CompilationCallback : PPC32CompilationCallback;
-}
-
-void *PPCJITInfo::emitFunctionStub(void *Fn, MachineCodeEmitter &MCE) {
- // If this is just a call to an external function, emit a branch instead of a
- // call. The code is the same except for one bit of the last instruction.
- if (Fn != (void*)(intptr_t)PPC32CompilationCallback &&
- Fn != (void*)(intptr_t)PPC64CompilationCallback) {
- MCE.startFunctionStub(7*4);
- intptr_t Addr = (intptr_t)MCE.getCurrentPCValue();
- MCE.emitWordBE(0);
- MCE.emitWordBE(0);
- MCE.emitWordBE(0);
- MCE.emitWordBE(0);
- MCE.emitWordBE(0);
- MCE.emitWordBE(0);
- MCE.emitWordBE(0);
- EmitBranchToAt(Addr, (intptr_t)Fn, false, is64Bit);
- return MCE.finishFunctionStub(0);
- }
-
- MCE.startFunctionStub(10*4);
- if (is64Bit) {
- MCE.emitWordBE(0xf821ffb1); // stdu r1,-80(r1)
- MCE.emitWordBE(0x7d6802a6); // mflr r11
- MCE.emitWordBE(0xf9610060); // std r11, 96(r1)
- } else {
- MCE.emitWordBE(0x9421ffe0); // stwu r1,-32(r1)
- MCE.emitWordBE(0x7d6802a6); // mflr r11
- MCE.emitWordBE(0x91610028); // stw r11, 40(r1)
- }
- intptr_t Addr = (intptr_t)MCE.getCurrentPCValue();
- MCE.emitWordBE(0);
- MCE.emitWordBE(0);
- MCE.emitWordBE(0);
- MCE.emitWordBE(0);
- MCE.emitWordBE(0);
- MCE.emitWordBE(0);
- MCE.emitWordBE(0);
- EmitBranchToAt(Addr, (intptr_t)Fn, true, is64Bit);
- return MCE.finishFunctionStub(0);
-}
-
-
-void PPCJITInfo::relocate(void *Function, MachineRelocation *MR,
- unsigned NumRelocs, unsigned char* GOTBase) {
- for (unsigned i = 0; i != NumRelocs; ++i, ++MR) {
- unsigned *RelocPos = (unsigned*)Function + MR->getMachineCodeOffset()/4;
- intptr_t ResultPtr = (intptr_t)MR->getResultPointer();
- switch ((PPC::RelocationType)MR->getRelocationType()) {
- default: assert(0 && "Unknown relocation type!");
- case PPC::reloc_pcrel_bx:
- // PC-relative relocation for b and bl instructions.
- ResultPtr = (ResultPtr-(intptr_t)RelocPos) >> 2;
- assert(ResultPtr >= -(1 << 23) && ResultPtr < (1 << 23) &&
- "Relocation out of range!");
- *RelocPos |= (ResultPtr & ((1 << 24)-1)) << 2;
- break;
- case PPC::reloc_pcrel_bcx:
- // PC-relative relocation for BLT,BLE,BEQ,BGE,BGT,BNE, or other
- // bcx instructions.
- ResultPtr = (ResultPtr-(intptr_t)RelocPos) >> 2;
- assert(ResultPtr >= -(1 << 13) && ResultPtr < (1 << 13) &&
- "Relocation out of range!");
- *RelocPos |= (ResultPtr & ((1 << 14)-1)) << 2;
- break;
- case PPC::reloc_absolute_ptr_high: // Pointer relocations.
- case PPC::reloc_absolute_ptr_low:
- case PPC::reloc_absolute_high: // high bits of ref -> low 16 of instr
- case PPC::reloc_absolute_low: { // low bits of ref -> low 16 of instr
- ResultPtr += MR->getConstantVal();
-
- // If this is a high-part access, get the high-part.
- if (MR->getRelocationType() == PPC::reloc_absolute_high ||
- MR->getRelocationType() == PPC::reloc_absolute_ptr_high) {
- // If the low part will have a carry (really a borrow) from the low
- // 16-bits into the high 16, add a bit to borrow from.
- if (((int)ResultPtr << 16) < 0)
- ResultPtr += 1 << 16;
- ResultPtr >>= 16;
- }
-
- // Do the addition then mask, so the addition does not overflow the
16-bit
- // immediate section of the instruction.
- unsigned LowBits = (*RelocPos + ResultPtr) & 65535;
- unsigned HighBits = *RelocPos & ~65535;
- *RelocPos = LowBits | HighBits; // Slam into low 16-bits
- break;
- }
- case PPC::reloc_absolute_low_ix: { // low bits of ref -> low 14 of instr
- ResultPtr += MR->getConstantVal();
- // Do the addition then mask, so the addition does not overflow the
16-bit
- // immediate section of the instruction.
- unsigned LowBits = (*RelocPos + ResultPtr) & 0xFFFC;
- unsigned HighBits = *RelocPos & 0xFFFF0003;
- *RelocPos = LowBits | HighBits; // Slam into low 14-bits.
- break;
- }
- }
- }
-}
-
-void PPCJITInfo::replaceMachineCodeForFunction(void *Old, void *New) {
- EmitBranchToAt((intptr_t)Old, (intptr_t)New, false, is64Bit);
-}
+//===-- PPCJITInfo.cpp - Implement the JIT interfaces for the PowerPC
-----===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the JIT interfaces for the 32-bit PowerPC target.
+//
+//===----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "jit"
+#include "PPCJITInfo.h"
+#include "PPCRelocations.h"
+#include "llvm/CodeGen/MachineCodeEmitter.h"
+#include "llvm/Config/alloca.h"
+#include "llvm/Support/Debug.h"
+#include <set>
+#include <iostream>
+using namespace llvm;
+
+static TargetJITInfo::JITCompilerFn JITCompilerFunction;
+
+#define BUILD_ADDIS(RD,RS,IMM16) \
+ ((15 << 26) | ((RD) << 21) | ((RS) << 16) | ((IMM16) & 65535))
+#define BUILD_ORI(RD,RS,UIMM16) \
+ ((24 << 26) | ((RS) << 21) | ((RD) << 16) | ((UIMM16) & 65535))
+#define BUILD_ORIS(RD,RS,UIMM16) \
+ ((25 << 26) | ((RS) << 21) | ((RD) << 16) | ((UIMM16) & 65535))
+#define BUILD_RLDICR(RD,RS,SH,ME) \
+ ((30 << 26) | ((RS) << 21) | ((RD) << 16) | (((SH) & 31) << 11) | \
+ (((ME) & 63) << 6) | (1 << 3) | (((SH) >> 5) & 1))
+#define BUILD_MTSPR(RS,SPR) \
+ ((31 << 26) | ((RS) << 21) | ((SPR) << 16) | (467 << 1))
+#define BUILD_BCCTRx(BO,BI,LINK) \
+ ((19 << 26) | ((BO) << 21) | ((BI) << 16) | (528 << 1) | ((LINK) & 1))
+#define BUILD_B(TARGET, LINK) \
+ ((18 << 26) | (((TARGET) & 0x00FFFFFF) << 2) | ((LINK) & 1))
+
+// Pseudo-ops
+#define BUILD_LIS(RD,IMM16) BUILD_ADDIS(RD,0,IMM16)
+#define BUILD_SLDI(RD,RS,IMM6) BUILD_RLDICR(RD,RS,IMM6,63-IMM6)
+#define BUILD_MTCTR(RS) BUILD_MTSPR(RS,9)
+#define BUILD_BCTR(LINK) BUILD_BCCTRx(20,0,LINK)
+
+static void EmitBranchToAt(uint64_t At, uint64_t To, bool isCall, bool
is64Bit){
+ intptr_t Offset = ((intptr_t)To - (intptr_t)At) >> 2;
+ unsigned *AtI = (unsigned*)(intptr_t)At;
+
+ if (Offset >= -(1 << 23) && Offset < (1 << 23)) { // In range?
+ AtI[0] = BUILD_B(Offset, isCall); // b/bl target
+ } else if (!is64Bit) {
+ AtI[0] = BUILD_LIS(12, To >> 16); // lis r12, hi16(address)
+ AtI[1] = BUILD_ORI(12, 12, To); // ori r12, r12, lo16(address)
+ AtI[2] = BUILD_MTCTR(12); // mtctr r12
+ AtI[3] = BUILD_BCTR(isCall); // bctr/bctrl
+ } else {
+ AtI[0] = BUILD_LIS(12, To >> 48); // lis r12, hi16(address)
+ AtI[1] = BUILD_ORI(12, 12, To >> 32); // ori r12, r12, lo16(address)
+ AtI[2] = BUILD_SLDI(12, 12, 32); // sldi r12, r12, 32
+ AtI[3] = BUILD_ORIS(12, 12, To >> 16); // oris r12, r12, hi16(address)
+ AtI[4] = BUILD_ORI(12, 12, To); // ori r12, r12, lo16(address)
+ AtI[5] = BUILD_MTCTR(12); // mtctr r12
+ AtI[6] = BUILD_BCTR(isCall); // bctr/bctrl
+ }
+}
+
+extern "C" void PPC32CompilationCallback();
+extern "C" void PPC64CompilationCallback();
+
+#if (defined(__POWERPC__) || defined (__ppc__) || defined(_POWER)) &&
!defined(__ppc64__)
+// CompilationCallback stub - We can't use a C function with inline assembly in
+// it, because we the prolog/epilog inserted by GCC won't work for us.
Instead,
+// write our own wrapper, which does things our way, so we have complete
control
+// over register saving and restoring.
+asm(
+ ".text\n"
+ ".align 2\n"
+ ".globl _PPC32CompilationCallback\n"
+"_PPC32CompilationCallback:\n"
+ // Make space for 8 ints r[3-10] and 13 doubles f[1-13] and the
+ // FIXME: need to save v[0-19] for altivec?
+ // FIXME: could shrink frame
+ // Set up a proper stack frame
+ "stwu r1, -208(r1)\n"
+ "mflr r0\n"
+ "stw r0, 216(r1)\n"
+ // Save all int arg registers
+ "stw r10, 204(r1)\n" "stw r9, 200(r1)\n"
+ "stw r8, 196(r1)\n" "stw r7, 192(r1)\n"
+ "stw r6, 188(r1)\n" "stw r5, 184(r1)\n"
+ "stw r4, 180(r1)\n" "stw r3, 176(r1)\n"
+ // Save all call-clobbered FP regs.
+ "stfd f13, 168(r1)\n" "stfd f12, 160(r1)\n"
+ "stfd f11, 152(r1)\n" "stfd f10, 144(r1)\n"
+ "stfd f9, 136(r1)\n" "stfd f8, 128(r1)\n"
+ "stfd f7, 120(r1)\n" "stfd f6, 112(r1)\n"
+ "stfd f5, 104(r1)\n" "stfd f4, 96(r1)\n"
+ "stfd f3, 88(r1)\n" "stfd f2, 80(r1)\n"
+ "stfd f1, 72(r1)\n"
+ // Arguments to Compilation Callback:
+ // r3 - our lr (address of the call instruction in stub plus 4)
+ // r4 - stub's lr (address of instruction that called the stub plus 4)
+ "mr r3, r0\n"
+ "lwz r2, 208(r1)\n" // stub's frame
+ "lwz r4, 8(r2)\n" // stub's lr
+ "li r5, 0\n" // 0 == 32 bit
+ "bl _PPCCompilationCallbackC\n"
+ "mtctr r3\n"
+ // Restore all int arg registers
+ "lwz r10, 204(r1)\n" "lwz r9, 200(r1)\n"
+ "lwz r8, 196(r1)\n" "lwz r7, 192(r1)\n"
+ "lwz r6, 188(r1)\n" "lwz r5, 184(r1)\n"
+ "lwz r4, 180(r1)\n" "lwz r3, 176(r1)\n"
+ // Restore all FP arg registers
+ "lfd f13, 168(r1)\n" "lfd f12, 160(r1)\n"
+ "lfd f11, 152(r1)\n" "lfd f10, 144(r1)\n"
+ "lfd f9, 136(r1)\n" "lfd f8, 128(r1)\n"
+ "lfd f7, 120(r1)\n" "lfd f6, 112(r1)\n"
+ "lfd f5, 104(r1)\n" "lfd f4, 96(r1)\n"
+ "lfd f3, 88(r1)\n" "lfd f2, 80(r1)\n"
+ "lfd f1, 72(r1)\n"
+ // Pop 3 frames off the stack and branch to target
+ "lwz r1, 208(r1)\n"
+ "lwz r2, 8(r1)\n"
+ "mtlr r2\n"
+ "bctr\n"
+ );
+#else
+void PPC32CompilationCallback() {
+ assert(0 && "This is not a power pc, you can't execute this!");
+ abort();
+}
+#endif
+
+#if (defined(__POWERPC__) || defined (__ppc__) || defined(_POWER)) &&
defined(__ppc64__)
+asm(
+ ".text\n"
+ ".align 2\n"
+ ".globl _PPC64CompilationCallback\n"
+"_PPC64CompilationCallback:\n"
+ // Make space for 8 ints r[3-10] and 13 doubles f[1-13] and the
+ // FIXME: need to save v[0-19] for altivec?
+ // Set up a proper stack frame
+ "stdu r1, -208(r1)\n"
+ "mflr r0\n"
+ "std r0, 224(r1)\n"
+ // Save all int arg registers
+ "std r10, 200(r1)\n" "std r9, 192(r1)\n"
+ "std r8, 184(r1)\n" "std r7, 176(r1)\n"
+ "std r6, 168(r1)\n" "std r5, 160(r1)\n"
+ "std r4, 152(r1)\n" "std r3, 144(r1)\n"
+ // Save all call-clobbered FP regs.
+ "stfd f13, 136(r1)\n" "stfd f12, 128(r1)\n"
+ "stfd f11, 120(r1)\n" "stfd f10, 112(r1)\n"
+ "stfd f9, 104(r1)\n" "stfd f8, 96(r1)\n"
+ "stfd f7, 88(r1)\n" "stfd f6, 80(r1)\n"
+ "stfd f5, 72(r1)\n" "stfd f4, 64(r1)\n"
+ "stfd f3, 56(r1)\n" "stfd f2, 48(r1)\n"
+ "stfd f1, 40(r1)\n"
+ // Arguments to Compilation Callback:
+ // r3 - our lr (address of the call instruction in stub plus 4)
+ // r4 - stub's lr (address of instruction that called the stub plus 4)
+ "mr r3, r0\n"
+ "ld r2, 208(r1)\n" // stub's frame
+ "ld r4, 16(r2)\n" // stub's lr
+ "li r5, 1\n" // 1 == 64 bit
+ "bl _PPCCompilationCallbackC\n"
+ "mtctr r3\n"
+ // Restore all int arg registers
+ "ld r10, 200(r1)\n" "ld r9, 192(r1)\n"
+ "ld r8, 184(r1)\n" "ld r7, 176(r1)\n"
+ "ld r6, 168(r1)\n" "ld r5, 160(r1)\n"
+ "ld r4, 152(r1)\n" "ld r3, 144(r1)\n"
+ // Restore all FP arg registers
+ "lfd f13, 136(r1)\n" "lfd f12, 128(r1)\n"
+ "lfd f11, 120(r1)\n" "lfd f10, 112(r1)\n"
+ "lfd f9, 104(r1)\n" "lfd f8, 96(r1)\n"
+ "lfd f7, 88(r1)\n" "lfd f6, 80(r1)\n"
+ "lfd f5, 72(r1)\n" "lfd f4, 64(r1)\n"
+ "lfd f3, 56(r1)\n" "lfd f2, 48(r1)\n"
+ "lfd f1, 40(r1)\n"
+ // Pop 3 frames off the stack and branch to target
+ "ld r1, 208(r1)\n"
+ "ld r2, 16(r1)\n"
+ "mtlr r2\n"
+ "bctr\n"
+ );
+#else
+void PPC64CompilationCallback() {
+ assert(0 && "This is not a power pc, you can't execute this!");
+ abort();
+}
+#endif
+
+extern "C" void *PPCCompilationCallbackC(unsigned *StubCallAddrPlus4,
+ unsigned *OrigCallAddrPlus4,
+ bool is64Bit) {
+ // Adjust the pointer to the address of the call instruction in the stub
+ // emitted by emitFunctionStub, rather than the instruction after it.
+ unsigned *StubCallAddr = StubCallAddrPlus4 - 1;
+ unsigned *OrigCallAddr = OrigCallAddrPlus4 - 1;
+
+ void *Target = JITCompilerFunction(StubCallAddr);
+
+ // Check to see if *OrigCallAddr is a 'bl' instruction, and if we can rewrite
+ // it to branch directly to the destination. If so, rewrite it so it does
not
+ // need to go through the stub anymore.
+ unsigned OrigCallInst = *OrigCallAddr;
+ if ((OrigCallInst >> 26) == 18) { // Direct call.
+ intptr_t Offset = ((intptr_t)Target - (intptr_t)OrigCallAddr) >> 2;
+
+ if (Offset >= -(1 << 23) && Offset < (1 << 23)) { // In range?
+ // Clear the original target out.
+ OrigCallInst &= (63 << 26) | 3;
+ // Fill in the new target.
+ OrigCallInst |= (Offset & ((1 << 24)-1)) << 2;
+ // Replace the call.
+ *OrigCallAddr = OrigCallInst;
+ }
+ }
+
+ // Assert that we are coming from a stub that was created with our
+ // emitFunctionStub.
+ if ((*StubCallAddr >> 26) == 18)
+ StubCallAddr -= 3;
+ else {
+ assert((*StubCallAddr >> 26) == 19 && "Call in stub is not indirect!");
+ StubCallAddr -= is64Bit ? 9 : 6;
+ }
+
+ // Rewrite the stub with an unconditional branch to the target, for any users
+ // who took the address of the stub.
+ EmitBranchToAt((intptr_t)StubCallAddr, (intptr_t)Target, false, is64Bit);
+
+ // Put the address of the target function to call and the address to return
to
+ // after calling the target function in a place that is easy to get on the
+ // stack after we restore all regs.
+ return Target;
+}
+
+
+
+TargetJITInfo::LazyResolverFn
+PPCJITInfo::getLazyResolverFunction(JITCompilerFn Fn) {
+ JITCompilerFunction = Fn;
+ return is64Bit ? PPC64CompilationCallback : PPC32CompilationCallback;
+}
+
+void *PPCJITInfo::emitFunctionStub(void *Fn, MachineCodeEmitter &MCE) {
+ // If this is just a call to an external function, emit a branch instead of a
+ // call. The code is the same except for one bit of the last instruction.
+ if (Fn != (void*)(intptr_t)PPC32CompilationCallback &&
+ Fn != (void*)(intptr_t)PPC64CompilationCallback) {
+ MCE.startFunctionStub(7*4);
+ intptr_t Addr = (intptr_t)MCE.getCurrentPCValue();
+ MCE.emitWordBE(0);
+ MCE.emitWordBE(0);
+ MCE.emitWordBE(0);
+ MCE.emitWordBE(0);
+ MCE.emitWordBE(0);
+ MCE.emitWordBE(0);
+ MCE.emitWordBE(0);
+ EmitBranchToAt(Addr, (intptr_t)Fn, false, is64Bit);
+ return MCE.finishFunctionStub(0);
+ }
+
+ MCE.startFunctionStub(10*4);
+ if (is64Bit) {
+ MCE.emitWordBE(0xf821ffb1); // stdu r1,-80(r1)
+ MCE.emitWordBE(0x7d6802a6); // mflr r11
+ MCE.emitWordBE(0xf9610060); // std r11, 96(r1)
+ } else {
+ MCE.emitWordBE(0x9421ffe0); // stwu r1,-32(r1)
+ MCE.emitWordBE(0x7d6802a6); // mflr r11
+ MCE.emitWordBE(0x91610028); // stw r11, 40(r1)
+ }
+ intptr_t Addr = (intptr_t)MCE.getCurrentPCValue();
+ MCE.emitWordBE(0);
+ MCE.emitWordBE(0);
+ MCE.emitWordBE(0);
+ MCE.emitWordBE(0);
+ MCE.emitWordBE(0);
+ MCE.emitWordBE(0);
+ MCE.emitWordBE(0);
+ EmitBranchToAt(Addr, (intptr_t)Fn, true, is64Bit);
+ return MCE.finishFunctionStub(0);
+}
+
+
+void PPCJITInfo::relocate(void *Function, MachineRelocation *MR,
+ unsigned NumRelocs, unsigned char* GOTBase) {
+ for (unsigned i = 0; i != NumRelocs; ++i, ++MR) {
+ unsigned *RelocPos = (unsigned*)Function + MR->getMachineCodeOffset()/4;
+ intptr_t ResultPtr = (intptr_t)MR->getResultPointer();
+ switch ((PPC::RelocationType)MR->getRelocationType()) {
+ default: assert(0 && "Unknown relocation type!");
+ case PPC::reloc_pcrel_bx:
+ // PC-relative relocation for b and bl instructions.
+ ResultPtr = (ResultPtr-(intptr_t)RelocPos) >> 2;
+ assert(ResultPtr >= -(1 << 23) && ResultPtr < (1 << 23) &&
+ "Relocation out of range!");
+ *RelocPos |= (ResultPtr & ((1 << 24)-1)) << 2;
+ break;
+ case PPC::reloc_pcrel_bcx:
+ // PC-relative relocation for BLT,BLE,BEQ,BGE,BGT,BNE, or other
+ // bcx instructions.
+ ResultPtr = (ResultPtr-(intptr_t)RelocPos) >> 2;
+ assert(ResultPtr >= -(1 << 13) && ResultPtr < (1 << 13) &&
+ "Relocation out of range!");
+ *RelocPos |= (ResultPtr & ((1 << 14)-1)) << 2;
+ break;
+ case PPC::reloc_absolute_high: // high bits of ref -> low 16 of instr
+ case PPC::reloc_absolute_low: { // low bits of ref -> low 16 of instr
+ ResultPtr += MR->getConstantVal();
+
+ // If this is a high-part access, get the high-part.
+ if (MR->getRelocationType() == PPC::reloc_absolute_high) {
+ // If the low part will have a carry (really a borrow) from the low
+ // 16-bits into the high 16, add a bit to borrow from.
+ if (((int)ResultPtr << 16) < 0)
+ ResultPtr += 1 << 16;
+ ResultPtr >>= 16;
+ }
+
+ // Do the addition then mask, so the addition does not overflow the
16-bit
+ // immediate section of the instruction.
+ unsigned LowBits = (*RelocPos + ResultPtr) & 65535;
+ unsigned HighBits = *RelocPos & ~65535;
+ *RelocPos = LowBits | HighBits; // Slam into low 16-bits
+ break;
+ }
+ case PPC::reloc_absolute_low_ix: { // low bits of ref -> low 14 of instr
+ ResultPtr += MR->getConstantVal();
+ // Do the addition then mask, so the addition does not overflow the
16-bit
+ // immediate section of the instruction.
+ unsigned LowBits = (*RelocPos + ResultPtr) & 0xFFFC;
+ unsigned HighBits = *RelocPos & 0xFFFF0003;
+ *RelocPos = LowBits | HighBits; // Slam into low 14-bits.
+ break;
+ }
+ }
+ }
+}
+
+void PPCJITInfo::replaceMachineCodeForFunction(void *Old, void *New) {
+ EmitBranchToAt((intptr_t)Old, (intptr_t)New, false, is64Bit);
+}
Index: llvm/lib/Target/PowerPC/PPCMachOWriter.cpp
diff -u llvm/lib/Target/PowerPC/PPCMachOWriter.cpp:1.3
llvm/lib/Target/PowerPC/PPCMachOWriter.cpp:1.4
--- llvm/lib/Target/PowerPC/PPCMachOWriter.cpp:1.3 Sun Sep 3 23:14:57 2006
+++ llvm/lib/Target/PowerPC/PPCMachOWriter.cpp Fri Sep 8 17:42:09 2006
@@ -12,6 +12,7 @@
//
//===----------------------------------------------------------------------===//
+#include "PPCRelocations.h"
#include "PPCTargetMachine.h"
#include "llvm/PassManager.h"
#include "llvm/CodeGen/MachOWriter.h"
@@ -22,11 +23,28 @@
class VISIBILITY_HIDDEN PPCMachOWriter : public MachOWriter {
public:
PPCMachOWriter(std::ostream &O, PPCTargetMachine &TM) : MachOWriter(O, TM)
{
- // FIMXE: choose ppc64 when appropriate
- Header.cputype = MachOHeader::CPU_TYPE_POWERPC;
+ if (TM.getTargetData()->getPointerSizeInBits() == 64) {
+ Header.cputype = MachOHeader::CPU_TYPE_POWERPC64;
+ } else {
+ Header.cputype = MachOHeader::CPU_TYPE_POWERPC;
+ }
Header.cpusubtype = MachOHeader::CPU_SUBTYPE_POWERPC_ALL;
}
+ virtual void GetTargetRelocation(MachOSection &MOS, MachineRelocation &MR,
+ uint64_t Addr);
+
+ // Constants for the relocation r_type field.
+ // see <mach-o/ppc/reloc.h>
+ enum { PPC_RELOC_VANILLA, // generic relocation
+ PPC_RELOC_PAIR, // the second relocation entry of a pair
+ PPC_RELOC_BR14, // 14 bit branch displacement to word address
+ PPC_RELOC_BR24, // 24 bit branch displacement to word address
+ PPC_RELOC_HI16, // a PAIR follows with the low 16 bits
+ PPC_RELOC_LO16, // a PAIR follows with the high 16 bits
+ PPC_RELOC_HA16, // a PAIR follows, which is sign extended to 32b
+ PPC_RELOC_LO14 // LO16 with low 2 bits implicitly zero
+ };
};
}
@@ -39,3 +57,69 @@
FPM.add(EW);
FPM.add(createPPCCodeEmitterPass(TM, EW->getMachineCodeEmitter()));
}
+
+/// GetTargetRelocation - For the MachineRelocation MR, convert it to one or
+/// more PowerPC MachORelocation(s), add the new relocations to the
+/// MachOSection, and rewrite the instruction at the section offset if
required
+/// by that relocation type.
+void PPCMachOWriter::GetTargetRelocation(MachOSection &MOS,
+ MachineRelocation &MR,
+ uint64_t Addr) {
+ // Keep track of whether or not this is an externally defined relocation.
+ uint32_t index = MOS.Index;
+ bool isExtern = false;
+
+ // Get the address of the instruction to rewrite
+ unsigned char *RelocPos = &MOS.SectionData[0] + MR.getMachineCodeOffset();
+
+ // Get the address of whatever it is we're relocating, if possible.
+ if (MR.isGlobalValue()) {
+ // determine whether or not its external and then figure out what section
+ // we put it in if it's a locally defined symbol.
+ } else if (MR.isString()) {
+ // lookup in global values?
+ } else {
+ assert((MR.isConstantPoolIndex() || MR.isJumpTableIndex()) &&
+ "Unhandled MachineRelocation type!");
+ }
+
+ switch ((PPC::RelocationType)MR.getRelocationType()) {
+ default: assert(0 && "Unknown PPC relocation type!");
+ case PPC::reloc_pcrel_bx:
+ case PPC::reloc_pcrel_bcx:
+ case PPC::reloc_absolute_low_ix:
+ assert(0 && "Unhandled PPC relocation type!");
+ break;
+ case PPC::reloc_absolute_high:
+ {
+ MachORelocation HA16(MR.getMachineCodeOffset(), index, false, 2,
isExtern,
+ PPC_RELOC_HA16);
+ MachORelocation PAIR(Addr & 0xFFFF, 0xFFFFFF, false, 2, isExtern,
+ PPC_RELOC_PAIR);
+ outword(RelocBuffer, HA16.r_address);
+ outword(RelocBuffer, HA16.getPackedFields());
+ outword(RelocBuffer, PAIR.r_address);
+ outword(RelocBuffer, PAIR.getPackedFields());
+ }
+ MOS.nreloc += 2;
+ Addr += 0x8000;
+ *(unsigned *)RelocPos &= 0xFFFF0000;
+ *(unsigned *)RelocPos |= ((Addr >> 16) & 0xFFFF);
+ break;
+ case PPC::reloc_absolute_low:
+ {
+ MachORelocation LO16(MR.getMachineCodeOffset(), index, false, 2,
isExtern,
+ PPC_RELOC_LO16);
+ MachORelocation PAIR(Addr >> 16, 0xFFFFFF, false, 2, isExtern,
+ PPC_RELOC_PAIR);
+ outword(RelocBuffer, LO16.r_address);
+ outword(RelocBuffer, LO16.getPackedFields());
+ outword(RelocBuffer, PAIR.r_address);
+ outword(RelocBuffer, PAIR.getPackedFields());
+ }
+ MOS.nreloc += 2;
+ *(unsigned *)RelocPos &= 0xFFFF0000;
+ *(unsigned *)RelocPos |= (Addr & 0xFFFF);
+ break;
+ }
+}
Index: llvm/lib/Target/PowerPC/PPCRelocations.h
diff -u llvm/lib/Target/PowerPC/PPCRelocations.h:1.9
llvm/lib/Target/PowerPC/PPCRelocations.h:1.10
--- llvm/lib/Target/PowerPC/PPCRelocations.h:1.9 Thu Jul 27 13:20:32 2006
+++ llvm/lib/Target/PowerPC/PPCRelocations.h Fri Sep 8 17:42:09 2006
@@ -44,21 +44,7 @@
// reloc_absolute_low_ix - Absolute relocation for the 64-bit load/store
// instruction which have two implicit zero bits.
- reloc_absolute_low_ix,
-
- // reloc_absolute_ptr_high - Absolute relocation for references to lazy
- // pointer stubs. In this case, the relocated instruction should be
- // relocated to point to a POINTER to the indicated global. The low-16
- // bits of the instruction are rewritten with the high 16-bits of the
- // address of the pointer.
- reloc_absolute_ptr_high,
-
- // reloc_absolute_ptr_low - Absolute relocation for references to lazy
- // pointer stubs. In this case, the relocated instruction should be
- // relocated to point to a POINTER to the indicated global. The low-16
- // bits of the instruction are rewritten with the low 16-bits of the
- // address of the pointer.
- reloc_absolute_ptr_low
+ reloc_absolute_low_ix
};
}
}
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