| /* | |
| * Copyright (c) 2022, 2024, Oracle and/or its affiliates. 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 | |
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| */ | |
| #ifndef CPU_PPC_CONTINUATIONHELPER_PPC_INLINE_HPP | |
| #define CPU_PPC_CONTINUATIONHELPER_PPC_INLINE_HPP | |
| #include "runtime/continuationHelper.hpp" | |
| static inline void patch_return_pc_with_preempt_stub(frame& f) { | |
| if (f.is_runtime_frame()) { | |
| // Patch the pc of the now old last Java frame (we already set the anchor to enterSpecial) | |
| // so that when target goes back to Java it will actually return to the preempt cleanup stub. | |
| frame::common_abi* abi = (frame::common_abi*)f.sp(); | |
| abi->lr = (uint64_t)StubRoutines::cont_preempt_stub(); | |
| } else { | |
| // The target will check for preemption once it returns to the interpreter | |
| // or the native wrapper code and will manually jump to the preempt stub. | |
| JavaThread *thread = JavaThread::current(); | |
| thread->set_preempt_alternate_return(StubRoutines::cont_preempt_stub()); | |
| } | |
| } | |
| inline int ContinuationHelper::frame_align_words(int size) { | |
| return size & 1; | |
| } | |
| inline intptr_t* ContinuationHelper::frame_align_pointer(intptr_t* p) { | |
| return align_down(p, frame::frame_alignment); | |
| } | |
| template<typename FKind> | |
| inline void ContinuationHelper::update_register_map(const frame& f, RegisterMap* map) { | |
| // Currently all registers are considered to be volatile and saved in the caller (java) frame if needed | |
| } | |
| inline void ContinuationHelper::update_register_map_with_callee(const frame& f, RegisterMap* map) { | |
| // Currently all registers are considered to be volatile and saved in the caller (java) frame if needed | |
| } | |
| inline void ContinuationHelper::push_pd(const frame& f) { | |
| f.own_abi()->callers_sp = (uint64_t)f.fp(); | |
| } | |
| inline void ContinuationHelper::set_anchor_to_entry_pd(JavaFrameAnchor* anchor, ContinuationEntry* cont) { | |
| // nothing to do | |
| } | |
| inline void ContinuationHelper::set_anchor_pd(JavaFrameAnchor* anchor, intptr_t* sp) { | |
| // nothing to do | |
| } | |
| #ifdef ASSERT | |
| inline bool ContinuationHelper::Frame::assert_frame_laid_out(frame f) { | |
| intptr_t* sp = f.sp(); | |
| address pc = *(address*)(sp - frame::sender_sp_ret_address_offset()); | |
| intptr_t* fp = (intptr_t*)f.own_abi()->callers_sp; | |
| assert(f.raw_pc() == pc, "f.ra_pc: " INTPTR_FORMAT " actual: " INTPTR_FORMAT, p2i(f.raw_pc()), p2i(pc)); | |
| assert(f.fp() == fp, "f.fp: " INTPTR_FORMAT " actual: " INTPTR_FORMAT, p2i(f.fp()), p2i(fp)); | |
| return f.raw_pc() == pc && f.fp() == fp; | |
| } | |
| #endif | |
| inline intptr_t** ContinuationHelper::Frame::callee_link_address(const frame& f) { | |
| return (intptr_t**)&f.own_abi()->callers_sp; | |
| } | |
| inline address* ContinuationHelper::InterpretedFrame::return_pc_address(const frame& f) { | |
| return (address*)&f.callers_abi()->lr; | |
| } | |
| inline void ContinuationHelper::InterpretedFrame::patch_sender_sp(frame& f, const frame& caller) { | |
| intptr_t* sp = caller.unextended_sp(); | |
| if (!f.is_heap_frame() && caller.is_interpreted_frame()) { | |
| // See diagram "Interpreter Calling Procedure on PPC" at the end of continuationFreezeThaw_ppc.inline.hpp | |
| sp = (intptr_t*)caller.at_relative(ijava_idx(top_frame_sp)); | |
| } | |
| assert(f.is_interpreted_frame(), ""); | |
| assert(f.is_heap_frame() || is_aligned(sp, frame::alignment_in_bytes), ""); | |
| intptr_t* la = f.addr_at(ijava_idx(sender_sp)); | |
| *la = f.is_heap_frame() ? (intptr_t)(sp - f.fp()) : (intptr_t)sp; | |
| } | |
| inline address* ContinuationHelper::Frame::return_pc_address(const frame& f) { | |
| return (address*)&f.callers_abi()->lr; | |
| } | |
| inline address ContinuationHelper::Frame::real_pc(const frame& f) { | |
| return (address)f.own_abi()->lr; | |
| } | |
| inline void ContinuationHelper::Frame::patch_pc(const frame& f, address pc) { | |
| f.own_abi()->lr = (uint64_t)pc; | |
| } | |
| // | Minimal ABI | | |
| // | (frame::java_abi) | | |
| // | 4 words | | |
| // | Caller's SP |<- FP of f's caller | |
| // |======================| | |
| // | | Frame of f's caller | |
| // | | | |
| // frame_bottom of f ->| | | |
| // |----------------------| | |
| // | L0 aka P0 | | |
| // | : | | |
| // | : Pn | | |
| // | : | | |
| // | Lm | | |
| // |----------------------| | |
| // | SP alignment (opt.) | | |
| // |----------------------| | |
| // | Minimal ABI | | |
| // | (frame::java_abi) | | |
| // | 4 words | | |
| // | Caller's SP |<- SP of f's caller / FP of f | |
| // |======================| | |
| // |ijava_state (metadata)| Frame of f | |
| // | | | |
| // | | | |
| // |----------------------| | |
| // | Expression stack | | |
| // | | | |
| // frame_top of f ->| | | |
| // if callee interp. |......................| | |
| // | L0 aka P0 |<- ijava_state.esp + callee_argsize | |
| // | : | | |
| // frame_top of f ->| : Pn | | |
| // + metadata_words | : |<- ijava_state.esp (1 slot below Pn) | |
| // if callee comp. | Lm | | |
| // |----------------------| | |
| // | SP alignment (opt.) | | |
| // |----------------------| | |
| // | Minimal ABI | | |
| // | (frame::java_abi) | | |
| // | 4 words | | |
| // | Caller's SP |<- SP of f / FP of f's callee | |
| // |======================| | |
| // |ijava_state (metadata)| Frame of f's callee | |
| // | | | |
| // | |
| // | Growth | | |
| // v v | |
| // | |
| // See also diagram at the end of continuation_ppc.inline.hpp | |
| // | |
| inline intptr_t* ContinuationHelper::InterpretedFrame::frame_top(const frame& f, InterpreterOopMap* mask) { // inclusive; this will be copied with the frame | |
| int expression_stack_sz = expression_stack_size(f, mask); | |
| intptr_t* res = (intptr_t*)f.interpreter_frame_monitor_end() - expression_stack_sz; | |
| assert(res <= (intptr_t*)f.get_ijava_state() - expression_stack_sz, | |
| "res=" PTR_FORMAT " f.get_ijava_state()=" PTR_FORMAT " expression_stack_sz=%d", | |
| p2i(res), p2i(f.get_ijava_state()), expression_stack_sz); | |
| assert(res >= f.unextended_sp(), | |
| "res: " INTPTR_FORMAT " ijava_state: " INTPTR_FORMAT " esp: " INTPTR_FORMAT " unextended_sp: " INTPTR_FORMAT " expression_stack_size: %d", | |
| p2i(res), p2i(f.get_ijava_state()), f.get_ijava_state()->esp, p2i(f.unextended_sp()), expression_stack_sz); | |
| return res; | |
| } | |
| inline intptr_t* ContinuationHelper::InterpretedFrame::frame_bottom(const frame& f) { | |
| return (intptr_t*)f.at_relative(ijava_idx(locals)) + 1; // exclusive (will not be copied), so we add 1 word | |
| } | |
| inline intptr_t* ContinuationHelper::InterpretedFrame::frame_top(const frame& f, int callee_argsize_incl_metadata, bool callee_interpreted) { | |
| intptr_t* pseudo_unextended_sp = f.interpreter_frame_esp() + 1 - frame::metadata_words_at_top; | |
| return pseudo_unextended_sp + (callee_interpreted ? callee_argsize_incl_metadata : 0); | |
| } | |
| inline intptr_t* ContinuationHelper::InterpretedFrame::callers_sp(const frame& f) { | |
| return f.fp(); | |
| } | |
| #endif // CPU_PPC_CONTINUATIONFRAMEHELPERS_PPC_INLINE_HPP |