12faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes/* 22faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes * Copyright (C) 2011 The Android Open Source Project 32faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes * 42faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes * Licensed under the Apache License, Version 2.0 (the "License"); 52faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes * you may not use this file except in compliance with the License. 62faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes * You may obtain a copy of the License at 72faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes * 82faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes * http://www.apache.org/licenses/LICENSE-2.0 92faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes * 102faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes * Unless required by applicable law or agreed to in writing, software 112faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes * distributed under the License is distributed on an "AS IS" BASIS, 122faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 132faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes * See the License for the specific language governing permissions and 142faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes * limitations under the License. 152faa5f1271587cda765f26bcf2951065300a01ffElliott Hughes */ 16bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers 17bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers#include "context_arm.h" 18bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers 19ea46f950e7a51585db293cd7f047de190a482414Brian Carlstrom#include "mirror/art_method.h" 2004d7aa92bc5548bc4d272b9480614f06248194ccIan Rogers#include "mirror/object-inl.h" 212dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers#include "stack.h" 222dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers#include "thread.h" 23bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers 24bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogersnamespace art { 25bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogersnamespace arm { 26bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers 276702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartierstatic const uint32_t gZero = 0; 286702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier 296702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartiervoid ArmContext::Reset() { 306702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier for (size_t i = 0; i < kNumberOfCoreRegisters; i++) { 316702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier gprs_[i] = NULL; 32bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers } 336702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier for (size_t i = 0; i < kNumberOfSRegisters; i++) { 346702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier fprs_[i] = NULL; 3515fdb8cfb5b2e3fc882113ec0648d492cebf852cIan Rogers } 366702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier gprs_[SP] = &sp_; 376702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier gprs_[PC] = &pc_; 386702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier // Initialize registers with easy to spot debug values. 396702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier sp_ = ArmContext::kBadGprBase + SP; 406702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier pc_ = ArmContext::kBadGprBase + PC; 41bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers} 42bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers 430399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogersvoid ArmContext::FillCalleeSaves(const StackVisitor& fr) { 44ea46f950e7a51585db293cd7f047de190a482414Brian Carlstrom mirror::ArtMethod* method = fr.GetMethod(); 45bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers uint32_t core_spills = method->GetCoreSpillMask(); 4615fdb8cfb5b2e3fc882113ec0648d492cebf852cIan Rogers uint32_t fp_core_spills = method->GetFpSpillMask(); 47bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers size_t spill_count = __builtin_popcount(core_spills); 4815fdb8cfb5b2e3fc882113ec0648d492cebf852cIan Rogers size_t fp_spill_count = __builtin_popcount(fp_core_spills); 490399dde18753aa9bd2bd0d7cf60beef154d164a4Ian Rogers size_t frame_size = method->GetFrameSizeInBytes(); 50bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers if (spill_count > 0) { 516702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier // Lowest number spill is farthest away, walk registers and fill into context 52bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers int j = 1; 536702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier for (size_t i = 0; i < kNumberOfCoreRegisters; i++) { 54bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers if (((core_spills >> i) & 1) != 0) { 556702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier gprs_[i] = fr.CalleeSaveAddress(spill_count - j, frame_size); 56bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers j++; 57bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers } 58bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers } 59bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers } 6015fdb8cfb5b2e3fc882113ec0648d492cebf852cIan Rogers if (fp_spill_count > 0) { 616702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier // Lowest number spill is farthest away, walk registers and fill into context 6215fdb8cfb5b2e3fc882113ec0648d492cebf852cIan Rogers int j = 1; 636702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier for (size_t i = 0; i < kNumberOfSRegisters; i++) { 6415fdb8cfb5b2e3fc882113ec0648d492cebf852cIan Rogers if (((fp_core_spills >> i) & 1) != 0) { 656702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier fprs_[i] = fr.CalleeSaveAddress(spill_count + fp_spill_count - j, frame_size); 6615fdb8cfb5b2e3fc882113ec0648d492cebf852cIan Rogers j++; 6715fdb8cfb5b2e3fc882113ec0648d492cebf852cIan Rogers } 6815fdb8cfb5b2e3fc882113ec0648d492cebf852cIan Rogers } 6915fdb8cfb5b2e3fc882113ec0648d492cebf852cIan Rogers } 70bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers} 71bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers 726702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartiervoid ArmContext::SetGPR(uint32_t reg, uintptr_t value) { 73d74e41b1cce5373aa24fd2fbea735173f6113d5aBrian Carlstrom DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfCoreRegisters)); 747934ac288acfb2552bb0b06ec1f61e5820d924a4Brian Carlstrom DCHECK_NE(gprs_[reg], &gZero); // Can't overwrite this static value since they are never reset. 754f6ad8ab428038129b2d0d6c40b7fd625cca15e1Ian Rogers DCHECK(gprs_[reg] != NULL); 766702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier *gprs_[reg] = value; 776702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier} 786702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier 799c750f9b6283f62b3e6a93c0c6b2838abde5000eElliott Hughesvoid ArmContext::SmashCallerSaves() { 806702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier // This needs to be 0 because we want a null/zero return value. 816702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier gprs_[R0] = const_cast<uint32_t*>(&gZero); 826702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier gprs_[R1] = const_cast<uint32_t*>(&gZero); 836702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier gprs_[R2] = NULL; 846702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier gprs_[R3] = NULL; 859c750f9b6283f62b3e6a93c0c6b2838abde5000eElliott Hughes} 869c750f9b6283f62b3e6a93c0c6b2838abde5000eElliott Hughes 878dbb708c7dc05c786329eb5c3fff3194ab6472acLogan Chienextern "C" void art_quick_do_long_jump(uint32_t*, uint32_t*); 8857b86d47b66322693a070185fadfb43cb9c12eabIan Rogers 89bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogersvoid ArmContext::DoLongJump() { 906702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier uintptr_t gprs[16]; 916702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier uint32_t fprs[32]; 926702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier for (size_t i = 0; i < kNumberOfCoreRegisters; ++i) { 936702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier gprs[i] = gprs_[i] != NULL ? *gprs_[i] : ArmContext::kBadGprBase + i; 946702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier } 956702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier for (size_t i = 0; i < kNumberOfSRegisters; ++i) { 966702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier fprs[i] = fprs_[i] != NULL ? *fprs_[i] : ArmContext::kBadGprBase + i; 976702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier } 986702243ea2332b566d8e8b871cc9db0906d835adMathieu Chartier DCHECK_EQ(reinterpret_cast<uintptr_t>(Thread::Current()), gprs[TR]); 998dbb708c7dc05c786329eb5c3fff3194ab6472acLogan Chien art_quick_do_long_jump(gprs, fprs); 100bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers} 101bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers 102bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers} // namespace arm 103bdb0391258abc54bf77c676e36847d28a783bfe5Ian Rogers} // namespace art 104