61b1a1ae77
This patch requires v3.18 kernel or above, because v3.10 kernel has a bug (as of 8/1/2017) in the ptrace(GETREGSET) function for mips and mips64. Change-Id: I004c1fa190193eebe1c84440b366289122a6bd8a Signed-off-by: Douglas Leung <douglas.leung@mips.com> Signed-off-by: Dejan Jovicevic <dejan.jovicevic@mips.com>
133 lines
3.6 KiB
C++
133 lines
3.6 KiB
C++
/*
|
|
* Copyright (C) 2016 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
#include <sys/ptrace.h>
|
|
#include <sys/uio.h>
|
|
|
|
#include <vector>
|
|
|
|
#include <unwindstack/Elf.h>
|
|
#include <unwindstack/MapInfo.h>
|
|
#include <unwindstack/Regs.h>
|
|
#include <unwindstack/RegsArm.h>
|
|
#include <unwindstack/RegsArm64.h>
|
|
#include <unwindstack/RegsX86.h>
|
|
#include <unwindstack/RegsX86_64.h>
|
|
#include <unwindstack/RegsMips.h>
|
|
#include <unwindstack/RegsMips64.h>
|
|
|
|
#include "UserArm.h"
|
|
#include "UserArm64.h"
|
|
#include "UserX86.h"
|
|
#include "UserX86_64.h"
|
|
#include "UserMips.h"
|
|
#include "UserMips64.h"
|
|
|
|
namespace unwindstack {
|
|
|
|
// The largest user structure.
|
|
constexpr size_t MAX_USER_REGS_SIZE = sizeof(mips64_user_regs) + 10;
|
|
|
|
// This function assumes that reg_data is already aligned to a 64 bit value.
|
|
// If not this could crash with an unaligned access.
|
|
Regs* Regs::RemoteGet(pid_t pid) {
|
|
// Make the buffer large enough to contain the largest registers type.
|
|
std::vector<uint64_t> buffer(MAX_USER_REGS_SIZE / sizeof(uint64_t));
|
|
struct iovec io;
|
|
io.iov_base = buffer.data();
|
|
io.iov_len = buffer.size() * sizeof(uint64_t);
|
|
|
|
if (ptrace(PTRACE_GETREGSET, pid, NT_PRSTATUS, reinterpret_cast<void*>(&io)) == -1) {
|
|
return nullptr;
|
|
}
|
|
|
|
switch (io.iov_len) {
|
|
case sizeof(x86_user_regs):
|
|
return RegsX86::Read(buffer.data());
|
|
case sizeof(x86_64_user_regs):
|
|
return RegsX86_64::Read(buffer.data());
|
|
case sizeof(arm_user_regs):
|
|
return RegsArm::Read(buffer.data());
|
|
case sizeof(arm64_user_regs):
|
|
return RegsArm64::Read(buffer.data());
|
|
case sizeof(mips_user_regs):
|
|
return RegsMips::Read(buffer.data());
|
|
case sizeof(mips64_user_regs):
|
|
return RegsMips64::Read(buffer.data());
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
Regs* Regs::CreateFromUcontext(ArchEnum arch, void* ucontext) {
|
|
switch (arch) {
|
|
case ARCH_X86:
|
|
return RegsX86::CreateFromUcontext(ucontext);
|
|
case ARCH_X86_64:
|
|
return RegsX86_64::CreateFromUcontext(ucontext);
|
|
case ARCH_ARM:
|
|
return RegsArm::CreateFromUcontext(ucontext);
|
|
case ARCH_ARM64:
|
|
return RegsArm64::CreateFromUcontext(ucontext);
|
|
case ARCH_MIPS:
|
|
return RegsMips::CreateFromUcontext(ucontext);
|
|
case ARCH_MIPS64:
|
|
return RegsMips64::CreateFromUcontext(ucontext);
|
|
case ARCH_UNKNOWN:
|
|
default:
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
ArchEnum Regs::CurrentArch() {
|
|
#if defined(__arm__)
|
|
return ARCH_ARM;
|
|
#elif defined(__aarch64__)
|
|
return ARCH_ARM64;
|
|
#elif defined(__i386__)
|
|
return ARCH_X86;
|
|
#elif defined(__x86_64__)
|
|
return ARCH_X86_64;
|
|
#elif defined(__mips__) && !defined(__LP64__)
|
|
return ARCH_MIPS;
|
|
#elif defined(__mips__) && defined(__LP64__)
|
|
return ARCH_MIPS64;
|
|
#else
|
|
abort();
|
|
#endif
|
|
}
|
|
|
|
Regs* Regs::CreateFromLocal() {
|
|
Regs* regs;
|
|
#if defined(__arm__)
|
|
regs = new RegsArm();
|
|
#elif defined(__aarch64__)
|
|
regs = new RegsArm64();
|
|
#elif defined(__i386__)
|
|
regs = new RegsX86();
|
|
#elif defined(__x86_64__)
|
|
regs = new RegsX86_64();
|
|
#elif defined(__mips__) && !defined(__LP64__)
|
|
regs = new RegsMips();
|
|
#elif defined(__mips__) && defined(__LP64__)
|
|
regs = new RegsMips64();
|
|
#else
|
|
abort();
|
|
#endif
|
|
return regs;
|
|
}
|
|
|
|
} // namespace unwindstack
|