--- a/src/hotspot/cpu/aarch64/aarch64_call.cpp Fri Jul 26 10:52:47 2019 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,200 +0,0 @@
-/*
- * Copyright (c) 2014, Red Hat 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- *
- */
-
-#ifdef BUILTIN_SIM
-
-#include <stdio.h>
-#include <sys/types.h>
-#include "asm/macroAssembler.hpp"
-#include "asm/macroAssembler.inline.hpp"
-#include "runtime/sharedRuntime.hpp"
-#include "../../../../../../simulator/cpustate.hpp"
-#include "../../../../../../simulator/simulator.hpp"
-
-/*
- * a routine to initialise and enter ARM simulator execution when
- * calling into ARM code from x86 code.
- *
- * we maintain a simulator per-thread and provide it with 8 Mb of
- * stack space
- */
-#define SIM_STACK_SIZE (1024 * 1024) // in units of u_int64_t
-
-extern "C" u_int64_t get_alt_stack()
-{
- return AArch64Simulator::altStack();
-}
-
-extern "C" void setup_arm_sim(void *sp, u_int64_t calltype)
-{
- // n.b. this function runs on the simulator stack so as to avoid
- // simulator frames appearing in between VM x86 and ARM frames. note
- // that arfgument sp points to the old (VM) stack from which the
- // call into the sim was made. The stack switch and entry into this
- // routine is handled by x86 prolog code planted in the head of the
- // ARM code buffer which the sim is about to start executing (see
- // aarch64_linkage.S).
- //
- // The first ARM instruction in the buffer is identified by fnptr
- // stored at the top of the old stack. x86 register contents precede
- // fnptr. preceding that are the fp and return address of the VM
- // caller into ARM code. any extra, non-register arguments passed to
- // the linkage routine precede the fp (this is as per any normal x86
- // call wirth extra args).
- //
- // note that the sim creates Java frames on the Java stack just
- // above sp (i.e. directly above fnptr). it sets the sim FP register
- // to the pushed fp for the caller effectively eliding the register
- // data saved by the linkage routine.
- //
- // x86 register call arguments are loaded from the stack into ARM
- // call registers. if extra arguments occur preceding the x86
- // caller's fp then they are copied either into extra ARM registers
- // (ARM has 8 rather than 6 gp call registers) or up the stack
- // beyond the saved x86 registers so that they immediately precede
- // the ARM frame where the ARM calling convention expects them to
- // be.
- //
- // n.b. the number of register/stack values passed to the ARM code
- // is determined by calltype
- //
- // +--------+
- // | fnptr | <--- argument sp points here
- // +--------+ |
- // | rax | | return slot if we need to return a value
- // +--------+ |
- // | rdi | increasing
- // +--------+ address
- // | rsi | |
- // +--------+ V
- // | rdx |
- // +--------+
- // | rcx |
- // +--------+
- // | r8 |
- // +--------+
- // | r9 |
- // +--------+
- // | xmm0 |
- // +--------+
- // | xmm1 |
- // +--------+
- // | xmm2 |
- // +--------+
- // | xmm3 |
- // +--------+
- // | xmm4 |
- // +--------+
- // | xmm5 |
- // +--------+
- // | xmm6 |
- // +--------+
- // | xmm7 |
- // +--------+
- // | fp |
- // +--------+
- // | caller |
- // | ret ip |
- // +--------+
- // | arg0 | <-- any extra call args start here
- // +--------+ offset = 18 * wordSize
- // | . . . | (i.e. 1 * calladdr + 1 * rax + 6 * gp call regs
- // + 8 * fp call regs + 2 * frame words)
- //
- // we use a unique sim/stack per thread
- const int cursor2_offset = 18;
- const int fp_offset = 16;
- u_int64_t *cursor = (u_int64_t *)sp;
- u_int64_t *cursor2 = ((u_int64_t *)sp) + cursor2_offset;
- u_int64_t *fp = ((u_int64_t *)sp) + fp_offset;
- int gp_arg_count = calltype & 0xf;
- int fp_arg_count = (calltype >> 4) & 0xf;
- int return_type = (calltype >> 8) & 0x3;
- AArch64Simulator *sim = AArch64Simulator::get_current(UseSimulatorCache, DisableBCCheck);
- // save previous cpu state in case this is a recursive entry
- CPUState saveState = sim->getCPUState();
- // set up initial sim pc, sp and fp registers
- sim->init(*cursor++, (u_int64_t)sp, (u_int64_t)fp);
- u_int64_t *return_slot = cursor++;
-
- // if we need to pass the sim extra args on the stack then bump
- // the stack pointer now
- u_int64_t *cursor3 = (u_int64_t *)sim->getCPUState().xreg(SP, 1);
- if (gp_arg_count > 8) {
- cursor3 -= gp_arg_count - 8;
- }
- if (fp_arg_count > 8) {
- cursor3 -= fp_arg_count - 8;
- }
- sim->getCPUState().xreg(SP, 1) = (u_int64_t)(cursor3++);
-
- for (int i = 0; i < gp_arg_count; i++) {
- if (i < 6) {
- // copy saved register to sim register
- GReg reg = (GReg)i;
- sim->getCPUState().xreg(reg, 0) = *cursor++;
- } else if (i < 8) {
- // copy extra int arg to sim register
- GReg reg = (GReg)i;
- sim->getCPUState().xreg(reg, 0) = *cursor2++;
- } else {
- // copy extra fp arg to sim stack
- *cursor3++ = *cursor2++;
- }
- }
- for (int i = 0; i < fp_arg_count; i++) {
- if (i < 8) {
- // copy saved register to sim register
- GReg reg = (GReg)i;
- sim->getCPUState().xreg(reg, 0) = *cursor++;
- } else {
- // copy extra arg to sim stack
- *cursor3++ = *cursor2++;
- }
- }
- AArch64Simulator::status_t return_status = sim->run();
- if (return_status != AArch64Simulator::STATUS_RETURN){
- sim->simPrint0();
- fatal("invalid status returned from simulator.run()\n");
- }
- switch (return_type) {
- case MacroAssembler::ret_type_void:
- default:
- break;
- case MacroAssembler::ret_type_integral:
- // this overwrites the saved r0
- *return_slot = sim->getCPUState().xreg(R0, 0);
- break;
- case MacroAssembler::ret_type_float:
- *(float *)return_slot = sim->getCPUState().sreg(V0);
- break;
- case MacroAssembler::ret_type_double:
- *(double *)return_slot = sim->getCPUState().dreg(V0);
- break;
- }
- // restore incoimng cpu state
- sim->getCPUState() = saveState;
-}
-
-#endif