hotspot/src/cpu/ppc/vm/relocInfo_ppc.cpp
changeset 22824 28258dd5cb2e
child 22829 08b62d0e80ed
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/cpu/ppc/vm/relocInfo_ppc.cpp	Fri Aug 02 16:46:45 2013 +0200
@@ -0,0 +1,133 @@
+/*
+ * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright 2012, 2013 SAP AG. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "asm/assembler.inline.hpp"
+#include "assembler_ppc.inline.hpp"
+#include "code/relocInfo.hpp"
+#include "nativeInst_ppc.hpp"
+#include "oops/oop.inline.hpp"
+#include "runtime/safepoint.hpp"
+
+void Relocation::pd_set_data_value(address x, intptr_t o, bool verify_only) {
+  bool copy_back_to_oop_pool = true;  // TODO: PPC port
+  // The following comment is from the declaration of DataRelocation:
+  //
+  //  "The "o" (displacement) argument is relevant only to split relocations
+  //   on RISC machines.  In some CPUs (SPARC), the set-hi and set-lo ins'ns
+  //   can encode more than 32 bits between them.  This allows compilers to
+  //   share set-hi instructions between addresses that differ by a small
+  //   offset (e.g., different static variables in the same class).
+  //   On such machines, the "x" argument to set_value on all set-lo
+  //   instructions must be the same as the "x" argument for the
+  //   corresponding set-hi instructions.  The "o" arguments for the
+  //   set-hi instructions are ignored, and must not affect the high-half
+  //   immediate constant.  The "o" arguments for the set-lo instructions are
+  //   added into the low-half immediate constant, and must not overflow it."
+  //
+  // Currently we don't support splitting of relocations, so o must be
+  // zero:
+  assert(o == 0, "tried to split relocations");
+
+  if (!verify_only) {
+    if (format() != 1) {
+      nativeMovConstReg_at(addr())->set_data_plain(((intptr_t)x), code());
+    } else {
+      assert(type() == relocInfo::oop_type || type() == relocInfo::metadata_type,
+             "how to encode else?");
+      narrowOop no = (type() == relocInfo::oop_type) ?
+        oopDesc::encode_heap_oop((oop)x) : oopDesc::encode_klass((Klass*)x);
+      nativeMovConstReg_at(addr())->set_narrow_oop(no, code());
+    }
+  } else {
+    assert((address) (nativeMovConstReg_at(addr())->data()) == x, "data must match");
+  }
+}
+
+address Relocation::pd_call_destination(address orig_addr) {
+  intptr_t adj = 0;
+  address inst_loc = addr();
+
+  if (orig_addr != NULL) {
+    // We just moved this call instruction from orig_addr to addr().
+    // This means its target will appear to have grown by addr() - orig_addr.
+    adj = -(inst_loc - orig_addr);
+  }
+  if (NativeFarCall::is_far_call_at(inst_loc)) {
+    NativeFarCall* call = nativeFarCall_at(inst_loc);
+    return call->destination() + (intptr_t)(call->is_pcrelative() ? adj : 0);
+  } else if (NativeJump::is_jump_at(inst_loc)) {
+    NativeJump* jump = nativeJump_at(inst_loc);
+    return jump->jump_destination() + (intptr_t)(jump->is_pcrelative() ? adj : 0);
+  } else if (NativeConditionalFarBranch::is_conditional_far_branch_at(inst_loc)) {
+    NativeConditionalFarBranch* branch = NativeConditionalFarBranch_at(inst_loc);
+    return branch->branch_destination();
+  } else {
+    // There are two instructions at the beginning of a stub, therefore we
+    // load at orig_addr + 8.
+    orig_addr = nativeCall_at(inst_loc)->get_trampoline();
+    if (orig_addr == NULL) {
+      return (address) -1;
+    } else {
+      return (address) nativeMovConstReg_at(orig_addr + 8)->data();
+    }
+  }
+}
+
+void Relocation::pd_set_call_destination(address x) {
+  address inst_loc = addr();
+
+  if (NativeFarCall::is_far_call_at(inst_loc)) {
+    NativeFarCall* call = nativeFarCall_at(inst_loc);
+    call->set_destination(x);
+  } else if (NativeJump::is_jump_at(inst_loc)) {
+    NativeJump* jump= nativeJump_at(inst_loc);
+    jump->set_jump_destination(x);
+  } else if (NativeConditionalFarBranch::is_conditional_far_branch_at(inst_loc)) {
+    NativeConditionalFarBranch* branch = NativeConditionalFarBranch_at(inst_loc);
+    branch->set_branch_destination(x);
+  } else {
+    NativeCall* call = nativeCall_at(inst_loc);
+    call->set_destination_mt_safe(x, false);
+  }
+}
+
+address* Relocation::pd_address_in_code() {
+  ShouldNotReachHere();
+  return 0;
+}
+
+address Relocation::pd_get_address_from_code() {
+  return (address)(nativeMovConstReg_at(addr())->data());
+}
+
+void poll_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) {
+}
+
+void poll_return_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) {
+}
+
+void metadata_Relocation::pd_fix_value(address x) {
+}