49e6ee928f
For now this leaves the ability to cross-unwind a mips process, but we should probably clean that up too. We need to remove the build remnants so that we can clean up the build system itself (otherwise it sees us talking about an architecture it doesn't know about, and assumes that something's wrong). Test: treehugger Change-Id: I2862c630cec95dbdd474e34c3568d0e1a6d44b16
124 lines
3.4 KiB
C++
124 lines
3.4 KiB
C++
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdint.h>
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#include <sys/ptrace.h>
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#include <sys/uio.h>
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#include <vector>
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#include <unwindstack/Elf.h>
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#include <unwindstack/MapInfo.h>
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#include <unwindstack/Regs.h>
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#include <unwindstack/RegsArm.h>
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#include <unwindstack/RegsArm64.h>
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#include <unwindstack/RegsMips.h>
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#include <unwindstack/RegsMips64.h>
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#include <unwindstack/RegsX86.h>
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#include <unwindstack/RegsX86_64.h>
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#include <unwindstack/UserArm.h>
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#include <unwindstack/UserArm64.h>
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#include <unwindstack/UserMips.h>
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#include <unwindstack/UserMips64.h>
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#include <unwindstack/UserX86.h>
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#include <unwindstack/UserX86_64.h>
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namespace unwindstack {
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// The largest user structure.
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constexpr size_t MAX_USER_REGS_SIZE = sizeof(mips64_user_regs) + 10;
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// This function assumes that reg_data is already aligned to a 64 bit value.
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// If not this could crash with an unaligned access.
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Regs* Regs::RemoteGet(pid_t pid) {
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// Make the buffer large enough to contain the largest registers type.
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std::vector<uint64_t> buffer(MAX_USER_REGS_SIZE / sizeof(uint64_t));
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struct iovec io;
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io.iov_base = buffer.data();
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io.iov_len = buffer.size() * sizeof(uint64_t);
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if (ptrace(PTRACE_GETREGSET, pid, NT_PRSTATUS, reinterpret_cast<void*>(&io)) == -1) {
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return nullptr;
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}
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switch (io.iov_len) {
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case sizeof(x86_user_regs):
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return RegsX86::Read(buffer.data());
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case sizeof(x86_64_user_regs):
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return RegsX86_64::Read(buffer.data());
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case sizeof(arm_user_regs):
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return RegsArm::Read(buffer.data());
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case sizeof(arm64_user_regs):
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return RegsArm64::Read(buffer.data());
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case sizeof(mips_user_regs):
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return RegsMips::Read(buffer.data());
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case sizeof(mips64_user_regs):
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return RegsMips64::Read(buffer.data());
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}
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return nullptr;
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}
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Regs* Regs::CreateFromUcontext(ArchEnum arch, void* ucontext) {
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switch (arch) {
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case ARCH_X86:
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return RegsX86::CreateFromUcontext(ucontext);
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case ARCH_X86_64:
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return RegsX86_64::CreateFromUcontext(ucontext);
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case ARCH_ARM:
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return RegsArm::CreateFromUcontext(ucontext);
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case ARCH_ARM64:
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return RegsArm64::CreateFromUcontext(ucontext);
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case ARCH_MIPS:
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return RegsMips::CreateFromUcontext(ucontext);
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case ARCH_MIPS64:
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return RegsMips64::CreateFromUcontext(ucontext);
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case ARCH_UNKNOWN:
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default:
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return nullptr;
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}
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}
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ArchEnum Regs::CurrentArch() {
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#if defined(__arm__)
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return ARCH_ARM;
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#elif defined(__aarch64__)
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return ARCH_ARM64;
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#elif defined(__i386__)
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return ARCH_X86;
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#elif defined(__x86_64__)
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return ARCH_X86_64;
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#else
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abort();
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#endif
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}
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Regs* Regs::CreateFromLocal() {
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Regs* regs;
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#if defined(__arm__)
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regs = new RegsArm();
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#elif defined(__aarch64__)
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regs = new RegsArm64();
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#elif defined(__i386__)
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regs = new RegsX86();
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#elif defined(__x86_64__)
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regs = new RegsX86_64();
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#else
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abort();
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#endif
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return regs;
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}
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} // namespace unwindstack
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