--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/cpu/sparc/vm/nativeInst_sparc.cpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,989 @@
+/*
+ * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+# include "incls/_precompiled.incl"
+# include "incls/_nativeInst_sparc.cpp.incl"
+
+
+void NativeInstruction::set_data64_sethi(address instaddr, intptr_t x) {
+ ResourceMark rm;
+ CodeBuffer buf(instaddr, 10 * BytesPerInstWord );
+ MacroAssembler* _masm = new MacroAssembler(&buf);
+ Register destreg;
+
+ destreg = inv_rd(*(unsigned int *)instaddr);
+ // Generate a the new sequence
+ Address dest( destreg, (address)x );
+ _masm->sethi( dest, true );
+ ICache::invalidate_range(instaddr, 7 * BytesPerInstWord);
+}
+
+void NativeInstruction::verify() {
+ // make sure code pattern is actually an instruction address
+ address addr = addr_at(0);
+ if (addr == 0 || ((intptr_t)addr & 3) != 0) {
+ fatal("not an instruction address");
+ }
+}
+
+void NativeInstruction::print() {
+ tty->print_cr(INTPTR_FORMAT ": 0x%x", addr_at(0), long_at(0));
+}
+
+void NativeInstruction::set_long_at(int offset, int i) {
+ address addr = addr_at(offset);
+ *(int*)addr = i;
+ ICache::invalidate_word(addr);
+}
+
+void NativeInstruction::set_jlong_at(int offset, jlong i) {
+ address addr = addr_at(offset);
+ *(jlong*)addr = i;
+ // Don't need to invalidate 2 words here, because
+ // the flush instruction operates on doublewords.
+ ICache::invalidate_word(addr);
+}
+
+void NativeInstruction::set_addr_at(int offset, address x) {
+ address addr = addr_at(offset);
+ assert( ((intptr_t)addr & (wordSize-1)) == 0, "set_addr_at bad address alignment");
+ *(uintptr_t*)addr = (uintptr_t)x;
+ // Don't need to invalidate 2 words here in the 64-bit case,
+ // because the flush instruction operates on doublewords.
+ ICache::invalidate_word(addr);
+ // The Intel code has this assertion for NativeCall::set_destination,
+ // NativeMovConstReg::set_data, NativeMovRegMem::set_offset,
+ // NativeJump::set_jump_destination, and NativePushImm32::set_data
+ //assert (Patching_lock->owned_by_self(), "must hold lock to patch instruction")
+}
+
+bool NativeInstruction::is_zero_test(Register ®) {
+ int x = long_at(0);
+ Assembler::op3s temp = (Assembler::op3s) (Assembler::sub_op3 | Assembler::cc_bit_op3);
+ if (is_op3(x, temp, Assembler::arith_op) &&
+ inv_immed(x) && inv_rd(x) == G0) {
+ if (inv_rs1(x) == G0) {
+ reg = inv_rs2(x);
+ return true;
+ } else if (inv_rs2(x) == G0) {
+ reg = inv_rs1(x);
+ return true;
+ }
+ }
+ return false;
+}
+
+bool NativeInstruction::is_load_store_with_small_offset(Register reg) {
+ int x = long_at(0);
+ if (is_op(x, Assembler::ldst_op) &&
+ inv_rs1(x) == reg && inv_immed(x)) {
+ return true;
+ }
+ return false;
+}
+
+void NativeCall::verify() {
+ NativeInstruction::verify();
+ // make sure code pattern is actually a call instruction
+ if (!is_op(long_at(0), Assembler::call_op)) {
+ fatal("not a call");
+ }
+}
+
+void NativeCall::print() {
+ tty->print_cr(INTPTR_FORMAT ": call " INTPTR_FORMAT, instruction_address(), destination());
+}
+
+
+// MT-safe patching of a call instruction (and following word).
+// First patches the second word, and then atomicly replaces
+// the first word with the first new instruction word.
+// Other processors might briefly see the old first word
+// followed by the new second word. This is OK if the old
+// second word is harmless, and the new second word may be
+// harmlessly executed in the delay slot of the call.
+void NativeCall::replace_mt_safe(address instr_addr, address code_buffer) {
+ assert(Patching_lock->is_locked() ||
+ SafepointSynchronize::is_at_safepoint(), "concurrent code patching");
+ assert (instr_addr != NULL, "illegal address for code patching");
+ NativeCall* n_call = nativeCall_at (instr_addr); // checking that it is a call
+ assert(NativeCall::instruction_size == 8, "wrong instruction size; must be 8");
+ int i0 = ((int*)code_buffer)[0];
+ int i1 = ((int*)code_buffer)[1];
+ int* contention_addr = (int*) n_call->addr_at(1*BytesPerInstWord);
+ assert(inv_op(*contention_addr) == Assembler::arith_op ||
+ *contention_addr == nop_instruction() || !VM_Version::v9_instructions_work(),
+ "must not interfere with original call");
+ // The set_long_at calls do the ICacheInvalidate so we just need to do them in reverse order
+ n_call->set_long_at(1*BytesPerInstWord, i1);
+ n_call->set_long_at(0*BytesPerInstWord, i0);
+ // NOTE: It is possible that another thread T will execute
+ // only the second patched word.
+ // In other words, since the original instruction is this
+ // call patching_stub; nop (NativeCall)
+ // and the new sequence from the buffer is this:
+ // sethi %hi(K), %r; add %r, %lo(K), %r (NativeMovConstReg)
+ // what T will execute is this:
+ // call patching_stub; add %r, %lo(K), %r
+ // thereby putting garbage into %r before calling the patching stub.
+ // This is OK, because the patching stub ignores the value of %r.
+
+ // Make sure the first-patched instruction, which may co-exist
+ // briefly with the call, will do something harmless.
+ assert(inv_op(*contention_addr) == Assembler::arith_op ||
+ *contention_addr == nop_instruction() || !VM_Version::v9_instructions_work(),
+ "must not interfere with original call");
+}
+
+// Similar to replace_mt_safe, but just changes the destination. The
+// important thing is that free-running threads are able to execute this
+// call instruction at all times. Thus, the displacement field must be
+// instruction-word-aligned. This is always true on SPARC.
+//
+// Used in the runtime linkage of calls; see class CompiledIC.
+void NativeCall::set_destination_mt_safe(address dest) {
+ assert(Patching_lock->is_locked() ||
+ SafepointSynchronize::is_at_safepoint(), "concurrent code patching");
+ // set_destination uses set_long_at which does the ICache::invalidate
+ set_destination(dest);
+}
+
+// Code for unit testing implementation of NativeCall class
+void NativeCall::test() {
+#ifdef ASSERT
+ ResourceMark rm;
+ CodeBuffer cb("test", 100, 100);
+ MacroAssembler* a = new MacroAssembler(&cb);
+ NativeCall *nc;
+ uint idx;
+ int offsets[] = {
+ 0x0,
+ 0xfffffff0,
+ 0x7ffffff0,
+ 0x80000000,
+ 0x20,
+ 0x4000,
+ };
+
+ VM_Version::allow_all();
+
+ a->call( a->pc(), relocInfo::none );
+ a->delayed()->nop();
+ nc = nativeCall_at( cb.code_begin() );
+ nc->print();
+
+ nc = nativeCall_overwriting_at( nc->next_instruction_address() );
+ for (idx = 0; idx < ARRAY_SIZE(offsets); idx++) {
+ nc->set_destination( cb.code_begin() + offsets[idx] );
+ assert(nc->destination() == (cb.code_begin() + offsets[idx]), "check unit test");
+ nc->print();
+ }
+
+ nc = nativeCall_before( cb.code_begin() + 8 );
+ nc->print();
+
+ VM_Version::revert();
+#endif
+}
+// End code for unit testing implementation of NativeCall class
+
+//-------------------------------------------------------------------
+
+#ifdef _LP64
+
+void NativeFarCall::set_destination(address dest) {
+ // Address materialized in the instruction stream, so nothing to do.
+ return;
+#if 0 // What we'd do if we really did want to change the destination
+ if (destination() == dest) {
+ return;
+ }
+ ResourceMark rm;
+ CodeBuffer buf(addr_at(0), instruction_size + 1);
+ MacroAssembler* _masm = new MacroAssembler(&buf);
+ // Generate the new sequence
+ Address(O7, dest);
+ _masm->jumpl_to(dest, O7);
+ ICache::invalidate_range(addr_at(0), instruction_size );
+#endif
+}
+
+void NativeFarCall::verify() {
+ // make sure code pattern is actually a jumpl_to instruction
+ assert((int)instruction_size == (int)NativeJump::instruction_size, "same as jump_to");
+ assert((int)jmpl_offset == (int)NativeMovConstReg::add_offset, "sethi size ok");
+ nativeJump_at(addr_at(0))->verify();
+}
+
+bool NativeFarCall::is_call_at(address instr) {
+ return nativeInstruction_at(instr)->is_sethi();
+}
+
+void NativeFarCall::print() {
+ tty->print_cr(INTPTR_FORMAT ": call " INTPTR_FORMAT, instruction_address(), destination());
+}
+
+bool NativeFarCall::destination_is_compiled_verified_entry_point() {
+ nmethod* callee = CodeCache::find_nmethod(destination());
+ if (callee == NULL) {
+ return false;
+ } else {
+ return destination() == callee->verified_entry_point();
+ }
+}
+
+// MT-safe patching of a far call.
+void NativeFarCall::replace_mt_safe(address instr_addr, address code_buffer) {
+ Unimplemented();
+}
+
+// Code for unit testing implementation of NativeFarCall class
+void NativeFarCall::test() {
+ Unimplemented();
+}
+// End code for unit testing implementation of NativeFarCall class
+
+#endif // _LP64
+
+//-------------------------------------------------------------------
+
+
+void NativeMovConstReg::verify() {
+ NativeInstruction::verify();
+ // make sure code pattern is actually a "set_oop" synthetic instruction
+ // see MacroAssembler::set_oop()
+ int i0 = long_at(sethi_offset);
+ int i1 = long_at(add_offset);
+
+ // verify the pattern "sethi %hi22(imm), reg ; add reg, %lo10(imm), reg"
+ Register rd = inv_rd(i0);
+#ifndef _LP64
+ if (!(is_op2(i0, Assembler::sethi_op2) && rd != G0 &&
+ is_op3(i1, Assembler::add_op3, Assembler::arith_op) &&
+ inv_immed(i1) && (unsigned)get_simm13(i1) < (1 << 10) &&
+ rd == inv_rs1(i1) && rd == inv_rd(i1))) {
+ fatal("not a set_oop");
+ }
+#else
+ if (!is_op2(i0, Assembler::sethi_op2) && rd != G0 ) {
+ fatal("not a set_oop");
+ }
+#endif
+}
+
+
+void NativeMovConstReg::print() {
+ tty->print_cr(INTPTR_FORMAT ": mov reg, " INTPTR_FORMAT, instruction_address(), data());
+}
+
+
+#ifdef _LP64
+intptr_t NativeMovConstReg::data() const {
+ return data64(addr_at(sethi_offset), long_at(add_offset));
+}
+#else
+intptr_t NativeMovConstReg::data() const {
+ return data32(long_at(sethi_offset), long_at(add_offset));
+}
+#endif
+
+
+void NativeMovConstReg::set_data(intptr_t x) {
+#ifdef _LP64
+ set_data64_sethi(addr_at(sethi_offset), x);
+#else
+ set_long_at(sethi_offset, set_data32_sethi( long_at(sethi_offset), x));
+#endif
+ set_long_at(add_offset, set_data32_simm13( long_at(add_offset), x));
+
+ // also store the value into an oop_Relocation cell, if any
+ CodeBlob* nm = CodeCache::find_blob(instruction_address());
+ if (nm != NULL) {
+ RelocIterator iter(nm, instruction_address(), next_instruction_address());
+ oop* oop_addr = NULL;
+ while (iter.next()) {
+ if (iter.type() == relocInfo::oop_type) {
+ oop_Relocation *r = iter.oop_reloc();
+ if (oop_addr == NULL) {
+ oop_addr = r->oop_addr();
+ *oop_addr = (oop)x;
+ } else {
+ assert(oop_addr == r->oop_addr(), "must be only one set-oop here");
+ }
+ }
+ }
+ }
+}
+
+
+// Code for unit testing implementation of NativeMovConstReg class
+void NativeMovConstReg::test() {
+#ifdef ASSERT
+ ResourceMark rm;
+ CodeBuffer cb("test", 100, 100);
+ MacroAssembler* a = new MacroAssembler(&cb);
+ NativeMovConstReg* nm;
+ uint idx;
+ int offsets[] = {
+ 0x0,
+ 0x7fffffff,
+ 0x80000000,
+ 0xffffffff,
+ 0x20,
+ 4096,
+ 4097,
+ };
+
+ VM_Version::allow_all();
+
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none);
+ a->add(I3, low10(0xaaaabbbb), I3);
+ a->sethi(0xccccdddd, O2, true, RelocationHolder::none);
+ a->add(O2, low10(0xccccdddd), O2);
+
+ nm = nativeMovConstReg_at( cb.code_begin() );
+ nm->print();
+
+ nm = nativeMovConstReg_at( nm->next_instruction_address() );
+ for (idx = 0; idx < ARRAY_SIZE(offsets); idx++) {
+ nm->set_data( offsets[idx] );
+ assert(nm->data() == offsets[idx], "check unit test");
+ }
+ nm->print();
+
+ VM_Version::revert();
+#endif
+}
+// End code for unit testing implementation of NativeMovConstReg class
+
+//-------------------------------------------------------------------
+
+void NativeMovConstRegPatching::verify() {
+ NativeInstruction::verify();
+ // Make sure code pattern is sethi/nop/add.
+ int i0 = long_at(sethi_offset);
+ int i1 = long_at(nop_offset);
+ int i2 = long_at(add_offset);
+ assert((int)nop_offset == (int)NativeMovConstReg::add_offset, "sethi size ok");
+
+ // Verify the pattern "sethi %hi22(imm), reg; nop; add reg, %lo10(imm), reg"
+ // The casual reader should note that on Sparc a nop is a special case if sethi
+ // in which the destination register is %g0.
+ Register rd0 = inv_rd(i0);
+ Register rd1 = inv_rd(i1);
+ if (!(is_op2(i0, Assembler::sethi_op2) && rd0 != G0 &&
+ is_op2(i1, Assembler::sethi_op2) && rd1 == G0 && // nop is a special case of sethi
+ is_op3(i2, Assembler::add_op3, Assembler::arith_op) &&
+ inv_immed(i2) && (unsigned)get_simm13(i2) < (1 << 10) &&
+ rd0 == inv_rs1(i2) && rd0 == inv_rd(i2))) {
+ fatal("not a set_oop");
+ }
+}
+
+
+void NativeMovConstRegPatching::print() {
+ tty->print_cr(INTPTR_FORMAT ": mov reg, " INTPTR_FORMAT, instruction_address(), data());
+}
+
+
+int NativeMovConstRegPatching::data() const {
+#ifdef _LP64
+ return data64(addr_at(sethi_offset), long_at(add_offset));
+#else
+ return data32(long_at(sethi_offset), long_at(add_offset));
+#endif
+}
+
+
+void NativeMovConstRegPatching::set_data(int x) {
+#ifdef _LP64
+ set_data64_sethi(addr_at(sethi_offset), x);
+#else
+ set_long_at(sethi_offset, set_data32_sethi(long_at(sethi_offset), x));
+#endif
+ set_long_at(add_offset, set_data32_simm13(long_at(add_offset), x));
+
+ // also store the value into an oop_Relocation cell, if any
+ CodeBlob* nm = CodeCache::find_blob(instruction_address());
+ if (nm != NULL) {
+ RelocIterator iter(nm, instruction_address(), next_instruction_address());
+ oop* oop_addr = NULL;
+ while (iter.next()) {
+ if (iter.type() == relocInfo::oop_type) {
+ oop_Relocation *r = iter.oop_reloc();
+ if (oop_addr == NULL) {
+ oop_addr = r->oop_addr();
+ *oop_addr = (oop)x;
+ } else {
+ assert(oop_addr == r->oop_addr(), "must be only one set-oop here");
+ }
+ }
+ }
+ }
+}
+
+
+// Code for unit testing implementation of NativeMovConstRegPatching class
+void NativeMovConstRegPatching::test() {
+#ifdef ASSERT
+ ResourceMark rm;
+ CodeBuffer cb("test", 100, 100);
+ MacroAssembler* a = new MacroAssembler(&cb);
+ NativeMovConstRegPatching* nm;
+ uint idx;
+ int offsets[] = {
+ 0x0,
+ 0x7fffffff,
+ 0x80000000,
+ 0xffffffff,
+ 0x20,
+ 4096,
+ 4097,
+ };
+
+ VM_Version::allow_all();
+
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none);
+ a->nop();
+ a->add(I3, low10(0xaaaabbbb), I3);
+ a->sethi(0xccccdddd, O2, true, RelocationHolder::none);
+ a->nop();
+ a->add(O2, low10(0xccccdddd), O2);
+
+ nm = nativeMovConstRegPatching_at( cb.code_begin() );
+ nm->print();
+
+ nm = nativeMovConstRegPatching_at( nm->next_instruction_address() );
+ for (idx = 0; idx < ARRAY_SIZE(offsets); idx++) {
+ nm->set_data( offsets[idx] );
+ assert(nm->data() == offsets[idx], "check unit test");
+ }
+ nm->print();
+
+ VM_Version::revert();
+#endif // ASSERT
+}
+// End code for unit testing implementation of NativeMovConstRegPatching class
+
+
+//-------------------------------------------------------------------
+
+
+void NativeMovRegMem::copy_instruction_to(address new_instruction_address) {
+ Untested("copy_instruction_to");
+ int instruction_size = next_instruction_address() - instruction_address();
+ for (int i = 0; i < instruction_size; i += BytesPerInstWord) {
+ *(int*)(new_instruction_address + i) = *(int*)(address(this) + i);
+ }
+}
+
+
+void NativeMovRegMem::verify() {
+ NativeInstruction::verify();
+ // make sure code pattern is actually a "ld" or "st" of some sort.
+ int i0 = long_at(0);
+ int op3 = inv_op3(i0);
+
+ assert((int)add_offset == NativeMovConstReg::add_offset, "sethi size ok");
+
+ if (!(is_op(i0, Assembler::ldst_op) &&
+ inv_immed(i0) &&
+ 0 != (op3 < op3_ldst_int_limit
+ ? (1 << op3 ) & (op3_mask_ld | op3_mask_st)
+ : (1 << (op3 - op3_ldst_int_limit)) & (op3_mask_ldf | op3_mask_stf))))
+ {
+ int i1 = long_at(ldst_offset);
+ Register rd = inv_rd(i0);
+
+ op3 = inv_op3(i1);
+ if (!is_op(i1, Assembler::ldst_op) && rd == inv_rs2(i1) &&
+ 0 != (op3 < op3_ldst_int_limit
+ ? (1 << op3 ) & (op3_mask_ld | op3_mask_st)
+ : (1 << (op3 - op3_ldst_int_limit)) & (op3_mask_ldf | op3_mask_stf))) {
+ fatal("not a ld* or st* op");
+ }
+ }
+}
+
+
+void NativeMovRegMem::print() {
+ if (is_immediate()) {
+ tty->print_cr(INTPTR_FORMAT ": mov reg, [reg + %x]", instruction_address(), offset());
+ } else {
+ tty->print_cr(INTPTR_FORMAT ": mov reg, [reg + reg]", instruction_address());
+ }
+}
+
+
+// Code for unit testing implementation of NativeMovRegMem class
+void NativeMovRegMem::test() {
+#ifdef ASSERT
+ ResourceMark rm;
+ CodeBuffer cb("test", 1000, 1000);
+ MacroAssembler* a = new MacroAssembler(&cb);
+ NativeMovRegMem* nm;
+ uint idx = 0;
+ uint idx1;
+ int offsets[] = {
+ 0x0,
+ 0xffffffff,
+ 0x7fffffff,
+ 0x80000000,
+ 4096,
+ 4097,
+ 0x20,
+ 0x4000,
+ };
+
+ VM_Version::allow_all();
+
+ a->ldsw( G5, low10(0xffffffff), G4 ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->add(I3, low10(0xaaaabbbb), I3);
+ a->ldsw( G5, I3, G4 ); idx++;
+ a->ldsb( G5, low10(0xffffffff), G4 ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->add(I3, low10(0xaaaabbbb), I3);
+ a->ldsb( G5, I3, G4 ); idx++;
+ a->ldsh( G5, low10(0xffffffff), G4 ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->add(I3, low10(0xaaaabbbb), I3);
+ a->ldsh( G5, I3, G4 ); idx++;
+ a->lduw( G5, low10(0xffffffff), G4 ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->add(I3, low10(0xaaaabbbb), I3);
+ a->lduw( G5, I3, G4 ); idx++;
+ a->ldub( G5, low10(0xffffffff), G4 ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->add(I3, low10(0xaaaabbbb), I3);
+ a->ldub( G5, I3, G4 ); idx++;
+ a->lduh( G5, low10(0xffffffff), G4 ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->add(I3, low10(0xaaaabbbb), I3);
+ a->lduh( G5, I3, G4 ); idx++;
+ a->ldx( G5, low10(0xffffffff), G4 ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->add(I3, low10(0xaaaabbbb), I3);
+ a->ldx( G5, I3, G4 ); idx++;
+ a->ldd( G5, low10(0xffffffff), G4 ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->add(I3, low10(0xaaaabbbb), I3);
+ a->ldd( G5, I3, G4 ); idx++;
+ a->ldf( FloatRegisterImpl::D, O2, -1, F14 ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->add(I3, low10(0xaaaabbbb), I3);
+ a->ldf( FloatRegisterImpl::S, O0, I3, F15 ); idx++;
+
+ a->stw( G5, G4, low10(0xffffffff) ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->add(I3, low10(0xaaaabbbb), I3);
+ a->stw( G5, G4, I3 ); idx++;
+ a->stb( G5, G4, low10(0xffffffff) ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->add(I3, low10(0xaaaabbbb), I3);
+ a->stb( G5, G4, I3 ); idx++;
+ a->sth( G5, G4, low10(0xffffffff) ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->add(I3, low10(0xaaaabbbb), I3);
+ a->sth( G5, G4, I3 ); idx++;
+ a->stx( G5, G4, low10(0xffffffff) ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->add(I3, low10(0xaaaabbbb), I3);
+ a->stx( G5, G4, I3 ); idx++;
+ a->std( G5, G4, low10(0xffffffff) ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->add(I3, low10(0xaaaabbbb), I3);
+ a->std( G5, G4, I3 ); idx++;
+ a->stf( FloatRegisterImpl::S, F18, O2, -1 ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->add(I3, low10(0xaaaabbbb), I3);
+ a->stf( FloatRegisterImpl::S, F15, O0, I3 ); idx++;
+
+ nm = nativeMovRegMem_at( cb.code_begin() );
+ nm->print();
+ nm->set_offset( low10(0) );
+ nm->print();
+ nm->add_offset_in_bytes( low10(0xbb) * wordSize );
+ nm->print();
+
+ while (--idx) {
+ nm = nativeMovRegMem_at( nm->next_instruction_address() );
+ nm->print();
+ for (idx1 = 0; idx1 < ARRAY_SIZE(offsets); idx1++) {
+ nm->set_offset( nm->is_immediate() ? low10(offsets[idx1]) : offsets[idx1] );
+ assert(nm->offset() == (nm->is_immediate() ? low10(offsets[idx1]) : offsets[idx1]),
+ "check unit test");
+ nm->print();
+ }
+ nm->add_offset_in_bytes( low10(0xbb) * wordSize );
+ nm->print();
+ }
+
+ VM_Version::revert();
+#endif // ASSERT
+}
+
+// End code for unit testing implementation of NativeMovRegMem class
+
+//--------------------------------------------------------------------------------
+
+
+void NativeMovRegMemPatching::copy_instruction_to(address new_instruction_address) {
+ Untested("copy_instruction_to");
+ int instruction_size = next_instruction_address() - instruction_address();
+ for (int i = 0; i < instruction_size; i += wordSize) {
+ *(long*)(new_instruction_address + i) = *(long*)(address(this) + i);
+ }
+}
+
+
+void NativeMovRegMemPatching::verify() {
+ NativeInstruction::verify();
+ // make sure code pattern is actually a "ld" or "st" of some sort.
+ int i0 = long_at(0);
+ int op3 = inv_op3(i0);
+
+ assert((int)nop_offset == (int)NativeMovConstReg::add_offset, "sethi size ok");
+
+ if (!(is_op(i0, Assembler::ldst_op) &&
+ inv_immed(i0) &&
+ 0 != (op3 < op3_ldst_int_limit
+ ? (1 << op3 ) & (op3_mask_ld | op3_mask_st)
+ : (1 << (op3 - op3_ldst_int_limit)) & (op3_mask_ldf | op3_mask_stf)))) {
+ int i1 = long_at(ldst_offset);
+ Register rd = inv_rd(i0);
+
+ op3 = inv_op3(i1);
+ if (!is_op(i1, Assembler::ldst_op) && rd == inv_rs2(i1) &&
+ 0 != (op3 < op3_ldst_int_limit
+ ? (1 << op3 ) & (op3_mask_ld | op3_mask_st)
+ : (1 << (op3 - op3_ldst_int_limit)) & (op3_mask_ldf | op3_mask_stf))) {
+ fatal("not a ld* or st* op");
+ }
+ }
+}
+
+
+void NativeMovRegMemPatching::print() {
+ if (is_immediate()) {
+ tty->print_cr(INTPTR_FORMAT ": mov reg, [reg + %x]", instruction_address(), offset());
+ } else {
+ tty->print_cr(INTPTR_FORMAT ": mov reg, [reg + reg]", instruction_address());
+ }
+}
+
+
+// Code for unit testing implementation of NativeMovRegMemPatching class
+void NativeMovRegMemPatching::test() {
+#ifdef ASSERT
+ ResourceMark rm;
+ CodeBuffer cb("test", 1000, 1000);
+ MacroAssembler* a = new MacroAssembler(&cb);
+ NativeMovRegMemPatching* nm;
+ uint idx = 0;
+ uint idx1;
+ int offsets[] = {
+ 0x0,
+ 0xffffffff,
+ 0x7fffffff,
+ 0x80000000,
+ 4096,
+ 4097,
+ 0x20,
+ 0x4000,
+ };
+
+ VM_Version::allow_all();
+
+ a->ldsw( G5, low10(0xffffffff), G4 ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->nop(); a->add(I3, low10(0xaaaabbbb), I3);
+ a->ldsw( G5, I3, G4 ); idx++;
+ a->ldsb( G5, low10(0xffffffff), G4 ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->nop(); a->add(I3, low10(0xaaaabbbb), I3);
+ a->ldsb( G5, I3, G4 ); idx++;
+ a->ldsh( G5, low10(0xffffffff), G4 ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->nop(); a->add(I3, low10(0xaaaabbbb), I3);
+ a->ldsh( G5, I3, G4 ); idx++;
+ a->lduw( G5, low10(0xffffffff), G4 ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->nop(); a->add(I3, low10(0xaaaabbbb), I3);
+ a->lduw( G5, I3, G4 ); idx++;
+ a->ldub( G5, low10(0xffffffff), G4 ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->nop(); a->add(I3, low10(0xaaaabbbb), I3);
+ a->ldub( G5, I3, G4 ); idx++;
+ a->lduh( G5, low10(0xffffffff), G4 ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->nop(); a->add(I3, low10(0xaaaabbbb), I3);
+ a->lduh( G5, I3, G4 ); idx++;
+ a->ldx( G5, low10(0xffffffff), G4 ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->nop(); a->add(I3, low10(0xaaaabbbb), I3);
+ a->ldx( G5, I3, G4 ); idx++;
+ a->ldd( G5, low10(0xffffffff), G4 ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->nop(); a->add(I3, low10(0xaaaabbbb), I3);
+ a->ldd( G5, I3, G4 ); idx++;
+ a->ldf( FloatRegisterImpl::D, O2, -1, F14 ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->nop(); a->add(I3, low10(0xaaaabbbb), I3);
+ a->ldf( FloatRegisterImpl::S, O0, I3, F15 ); idx++;
+
+ a->stw( G5, G4, low10(0xffffffff) ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->nop(); a->add(I3, low10(0xaaaabbbb), I3);
+ a->stw( G5, G4, I3 ); idx++;
+ a->stb( G5, G4, low10(0xffffffff) ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->nop(); a->add(I3, low10(0xaaaabbbb), I3);
+ a->stb( G5, G4, I3 ); idx++;
+ a->sth( G5, G4, low10(0xffffffff) ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->nop(); a->add(I3, low10(0xaaaabbbb), I3);
+ a->sth( G5, G4, I3 ); idx++;
+ a->stx( G5, G4, low10(0xffffffff) ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->nop(); a->add(I3, low10(0xaaaabbbb), I3);
+ a->stx( G5, G4, I3 ); idx++;
+ a->std( G5, G4, low10(0xffffffff) ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->nop(); a->add(I3, low10(0xaaaabbbb), I3);
+ a->std( G5, G4, I3 ); idx++;
+ a->stf( FloatRegisterImpl::S, F18, O2, -1 ); idx++;
+ a->sethi(0xaaaabbbb, I3, true, RelocationHolder::none); a->nop(); a->add(I3, low10(0xaaaabbbb), I3);
+ a->stf( FloatRegisterImpl::S, F15, O0, I3 ); idx++;
+
+ nm = nativeMovRegMemPatching_at( cb.code_begin() );
+ nm->print();
+ nm->set_offset( low10(0) );
+ nm->print();
+ nm->add_offset_in_bytes( low10(0xbb) * wordSize );
+ nm->print();
+
+ while (--idx) {
+ nm = nativeMovRegMemPatching_at( nm->next_instruction_address() );
+ nm->print();
+ for (idx1 = 0; idx1 < ARRAY_SIZE(offsets); idx1++) {
+ nm->set_offset( nm->is_immediate() ? low10(offsets[idx1]) : offsets[idx1] );
+ assert(nm->offset() == (nm->is_immediate() ? low10(offsets[idx1]) : offsets[idx1]),
+ "check unit test");
+ nm->print();
+ }
+ nm->add_offset_in_bytes( low10(0xbb) * wordSize );
+ nm->print();
+ }
+
+ VM_Version::revert();
+#endif // ASSERT
+}
+// End code for unit testing implementation of NativeMovRegMemPatching class
+
+
+//--------------------------------------------------------------------------------
+
+
+void NativeJump::verify() {
+ NativeInstruction::verify();
+ int i0 = long_at(sethi_offset);
+ int i1 = long_at(jmpl_offset);
+ assert((int)jmpl_offset == (int)NativeMovConstReg::add_offset, "sethi size ok");
+ // verify the pattern "sethi %hi22(imm), treg ; jmpl treg, %lo10(imm), lreg"
+ Register rd = inv_rd(i0);
+#ifndef _LP64
+ if (!(is_op2(i0, Assembler::sethi_op2) && rd != G0 &&
+ (is_op3(i1, Assembler::jmpl_op3, Assembler::arith_op) ||
+ (TraceJumps && is_op3(i1, Assembler::add_op3, Assembler::arith_op))) &&
+ inv_immed(i1) && (unsigned)get_simm13(i1) < (1 << 10) &&
+ rd == inv_rs1(i1))) {
+ fatal("not a jump_to instruction");
+ }
+#else
+ // In LP64, the jump instruction location varies for non relocatable
+ // jumps, for example is could be sethi, xor, jmp instead of the
+ // 7 instructions for sethi. So let's check sethi only.
+ if (!is_op2(i0, Assembler::sethi_op2) && rd != G0 ) {
+ fatal("not a jump_to instruction");
+ }
+#endif
+}
+
+
+void NativeJump::print() {
+ tty->print_cr(INTPTR_FORMAT ": jmpl reg, " INTPTR_FORMAT, instruction_address(), jump_destination());
+}
+
+
+// Code for unit testing implementation of NativeJump class
+void NativeJump::test() {
+#ifdef ASSERT
+ ResourceMark rm;
+ CodeBuffer cb("test", 100, 100);
+ MacroAssembler* a = new MacroAssembler(&cb);
+ NativeJump* nj;
+ uint idx;
+ int offsets[] = {
+ 0x0,
+ 0xffffffff,
+ 0x7fffffff,
+ 0x80000000,
+ 4096,
+ 4097,
+ 0x20,
+ 0x4000,
+ };
+
+ VM_Version::allow_all();
+
+ a->sethi(0x7fffbbbb, I3, true, RelocationHolder::none);
+ a->jmpl(I3, low10(0x7fffbbbb), G0, RelocationHolder::none);
+ a->delayed()->nop();
+ a->sethi(0x7fffbbbb, I3, true, RelocationHolder::none);
+ a->jmpl(I3, low10(0x7fffbbbb), L3, RelocationHolder::none);
+ a->delayed()->nop();
+
+ nj = nativeJump_at( cb.code_begin() );
+ nj->print();
+
+ nj = nativeJump_at( nj->next_instruction_address() );
+ for (idx = 0; idx < ARRAY_SIZE(offsets); idx++) {
+ nj->set_jump_destination( nj->instruction_address() + offsets[idx] );
+ assert(nj->jump_destination() == (nj->instruction_address() + offsets[idx]), "check unit test");
+ nj->print();
+ }
+
+ VM_Version::revert();
+#endif // ASSERT
+}
+// End code for unit testing implementation of NativeJump class
+
+
+void NativeJump::insert(address code_pos, address entry) {
+ Unimplemented();
+}
+
+// MT safe inserting of a jump over an unknown instruction sequence (used by nmethod::makeZombie)
+// The problem: jump_to <dest> is a 3-word instruction (including its delay slot).
+// Atomic write can be only with 1 word.
+void NativeJump::patch_verified_entry(address entry, address verified_entry, address dest) {
+ // Here's one way to do it: Pre-allocate a three-word jump sequence somewhere
+ // in the header of the nmethod, within a short branch's span of the patch point.
+ // Set up the jump sequence using NativeJump::insert, and then use an annulled
+ // unconditional branch at the target site (an atomic 1-word update).
+ // Limitations: You can only patch nmethods, with any given nmethod patched at
+ // most once, and the patch must be in the nmethod's header.
+ // It's messy, but you can ask the CodeCache for the nmethod containing the
+ // target address.
+
+ // %%%%% For now, do something MT-stupid:
+ ResourceMark rm;
+ int code_size = 1 * BytesPerInstWord;
+ CodeBuffer cb(verified_entry, code_size + 1);
+ MacroAssembler* a = new MacroAssembler(&cb);
+ if (VM_Version::v9_instructions_work()) {
+ a->ldsw(G0, 0, O7); // "ld" must agree with code in the signal handler
+ } else {
+ a->lduw(G0, 0, O7); // "ld" must agree with code in the signal handler
+ }
+ ICache::invalidate_range(verified_entry, code_size);
+}
+
+
+void NativeIllegalInstruction::insert(address code_pos) {
+ NativeIllegalInstruction* nii = (NativeIllegalInstruction*) nativeInstruction_at(code_pos);
+ nii->set_long_at(0, illegal_instruction());
+}
+
+static int illegal_instruction_bits = 0;
+
+int NativeInstruction::illegal_instruction() {
+ if (illegal_instruction_bits == 0) {
+ ResourceMark rm;
+ char buf[40];
+ CodeBuffer cbuf((address)&buf[0], 20);
+ MacroAssembler* a = new MacroAssembler(&cbuf);
+ address ia = a->pc();
+ a->trap(ST_RESERVED_FOR_USER_0 + 1);
+ int bits = *(int*)ia;
+ assert(is_op3(bits, Assembler::trap_op3, Assembler::arith_op), "bad instruction");
+ illegal_instruction_bits = bits;
+ assert(illegal_instruction_bits != 0, "oops");
+ }
+ return illegal_instruction_bits;
+}
+
+static int ic_miss_trap_bits = 0;
+
+bool NativeInstruction::is_ic_miss_trap() {
+ if (ic_miss_trap_bits == 0) {
+ ResourceMark rm;
+ char buf[40];
+ CodeBuffer cbuf((address)&buf[0], 20);
+ MacroAssembler* a = new MacroAssembler(&cbuf);
+ address ia = a->pc();
+ a->trap(Assembler::notEqual, Assembler::ptr_cc, G0, ST_RESERVED_FOR_USER_0 + 2);
+ int bits = *(int*)ia;
+ assert(is_op3(bits, Assembler::trap_op3, Assembler::arith_op), "bad instruction");
+ ic_miss_trap_bits = bits;
+ assert(ic_miss_trap_bits != 0, "oops");
+ }
+ return long_at(0) == ic_miss_trap_bits;
+}
+
+
+bool NativeInstruction::is_illegal() {
+ if (illegal_instruction_bits == 0) {
+ return false;
+ }
+ return long_at(0) == illegal_instruction_bits;
+}
+
+
+void NativeGeneralJump::verify() {
+ assert(((NativeInstruction *)this)->is_jump() ||
+ ((NativeInstruction *)this)->is_cond_jump(), "not a general jump instruction");
+}
+
+
+void NativeGeneralJump::insert_unconditional(address code_pos, address entry) {
+ Assembler::Condition condition = Assembler::always;
+ int x = Assembler::op2(Assembler::br_op2) | Assembler::annul(false) |
+ Assembler::cond(condition) | Assembler::wdisp((intptr_t)entry, (intptr_t)code_pos, 22);
+ NativeGeneralJump* ni = (NativeGeneralJump*) nativeInstruction_at(code_pos);
+ ni->set_long_at(0, x);
+}
+
+
+// MT-safe patching of a jmp instruction (and following word).
+// First patches the second word, and then atomicly replaces
+// the first word with the first new instruction word.
+// Other processors might briefly see the old first word
+// followed by the new second word. This is OK if the old
+// second word is harmless, and the new second word may be
+// harmlessly executed in the delay slot of the call.
+void NativeGeneralJump::replace_mt_safe(address instr_addr, address code_buffer) {
+ assert(Patching_lock->is_locked() ||
+ SafepointSynchronize::is_at_safepoint(), "concurrent code patching");
+ assert (instr_addr != NULL, "illegal address for code patching");
+ NativeGeneralJump* h_jump = nativeGeneralJump_at (instr_addr); // checking that it is a call
+ assert(NativeGeneralJump::instruction_size == 8, "wrong instruction size; must be 8");
+ int i0 = ((int*)code_buffer)[0];
+ int i1 = ((int*)code_buffer)[1];
+ int* contention_addr = (int*) h_jump->addr_at(1*BytesPerInstWord);
+ assert(inv_op(*contention_addr) == Assembler::arith_op ||
+ *contention_addr == nop_instruction() || !VM_Version::v9_instructions_work(),
+ "must not interfere with original call");
+ // The set_long_at calls do the ICacheInvalidate so we just need to do them in reverse order
+ h_jump->set_long_at(1*BytesPerInstWord, i1);
+ h_jump->set_long_at(0*BytesPerInstWord, i0);
+ // NOTE: It is possible that another thread T will execute
+ // only the second patched word.
+ // In other words, since the original instruction is this
+ // jmp patching_stub; nop (NativeGeneralJump)
+ // and the new sequence from the buffer is this:
+ // sethi %hi(K), %r; add %r, %lo(K), %r (NativeMovConstReg)
+ // what T will execute is this:
+ // jmp patching_stub; add %r, %lo(K), %r
+ // thereby putting garbage into %r before calling the patching stub.
+ // This is OK, because the patching stub ignores the value of %r.
+
+ // Make sure the first-patched instruction, which may co-exist
+ // briefly with the call, will do something harmless.
+ assert(inv_op(*contention_addr) == Assembler::arith_op ||
+ *contention_addr == nop_instruction() || !VM_Version::v9_instructions_work(),
+ "must not interfere with original call");
+}