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// Copyright (c) 2014, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "linux/dump_writer_common/thread_info.h"
#include <string.h>
#include <assert.h>
#include "common/linux/linux_libc_support.h"
#include "google_breakpad/common/minidump_format.h"
namespace {
#if defined(__i386__)
// Write a uint16_t to memory
// out: memory location to write to
// v: value to write.
void U16(void* out, uint16_t v) {
my_memcpy(out, &v, sizeof(v));
}
// Write a uint32_t to memory
// out: memory location to write to
// v: value to write.
void U32(void* out, uint32_t v) {
my_memcpy(out, &v, sizeof(v));
}
#endif
}
namespace google_breakpad {
#if defined(__i386__)
uintptr_t ThreadInfo::GetInstructionPointer() const {
return regs.eip;
}
void ThreadInfo::FillCPUContext(RawContextCPU* out) const {
out->context_flags = MD_CONTEXT_X86_ALL;
out->dr0 = dregs[0];
out->dr1 = dregs[1];
out->dr2 = dregs[2];
out->dr3 = dregs[3];
// 4 and 5 deliberatly omitted because they aren't included in the minidump
// format.
out->dr6 = dregs[6];
out->dr7 = dregs[7];
out->gs = regs.xgs;
out->fs = regs.xfs;
out->es = regs.xes;
out->ds = regs.xds;
out->edi = regs.edi;
out->esi = regs.esi;
out->ebx = regs.ebx;
out->edx = regs.edx;
out->ecx = regs.ecx;
out->eax = regs.eax;
out->ebp = regs.ebp;
out->eip = regs.eip;
out->cs = regs.xcs;
out->eflags = regs.eflags;
out->esp = regs.esp;
out->ss = regs.xss;
out->float_save.control_word = fpregs.cwd;
out->float_save.status_word = fpregs.swd;
out->float_save.tag_word = fpregs.twd;
out->float_save.error_offset = fpregs.fip;
out->float_save.error_selector = fpregs.fcs;
out->float_save.data_offset = fpregs.foo;
out->float_save.data_selector = fpregs.fos;
// 8 registers * 10 bytes per register.
my_memcpy(out->float_save.register_area, fpregs.st_space, 10 * 8);
// This matches the Intel fpsave format.
U16(out->extended_registers + 0, fpregs.cwd);
U16(out->extended_registers + 2, fpregs.swd);
U16(out->extended_registers + 4, fpregs.twd);
U16(out->extended_registers + 6, fpxregs.fop);
U32(out->extended_registers + 8, fpxregs.fip);
U16(out->extended_registers + 12, fpxregs.fcs);
U32(out->extended_registers + 16, fpregs.foo);
U16(out->extended_registers + 20, fpregs.fos);
U32(out->extended_registers + 24, fpxregs.mxcsr);
my_memcpy(out->extended_registers + 32, &fpxregs.st_space, 128);
my_memcpy(out->extended_registers + 160, &fpxregs.xmm_space, 128);
}
#elif defined(__x86_64)
uintptr_t ThreadInfo::GetInstructionPointer() const {
return regs.rip;
}
void ThreadInfo::FillCPUContext(RawContextCPU* out) const {
out->context_flags = MD_CONTEXT_AMD64_FULL |
MD_CONTEXT_AMD64_SEGMENTS;
out->cs = regs.cs;
out->ds = regs.ds;
out->es = regs.es;
out->fs = regs.fs;
out->gs = regs.gs;
out->ss = regs.ss;
out->eflags = regs.eflags;
out->dr0 = dregs[0];
out->dr1 = dregs[1];
out->dr2 = dregs[2];
out->dr3 = dregs[3];
// 4 and 5 deliberatly omitted because they aren't included in the minidump
// format.
out->dr6 = dregs[6];
out->dr7 = dregs[7];
out->rax = regs.rax;
out->rcx = regs.rcx;
out->rdx = regs.rdx;
out->rbx = regs.rbx;
out->rsp = regs.rsp;
out->rbp = regs.rbp;
out->rsi = regs.rsi;
out->rdi = regs.rdi;
out->r8 = regs.r8;
out->r9 = regs.r9;
out->r10 = regs.r10;
out->r11 = regs.r11;
out->r12 = regs.r12;
out->r13 = regs.r13;
out->r14 = regs.r14;
out->r15 = regs.r15;
out->rip = regs.rip;
out->flt_save.control_word = fpregs.cwd;
out->flt_save.status_word = fpregs.swd;
out->flt_save.tag_word = fpregs.ftw;
out->flt_save.error_opcode = fpregs.fop;
out->flt_save.error_offset = fpregs.rip;
out->flt_save.error_selector = 0; // We don't have this.
out->flt_save.data_offset = fpregs.rdp;
out->flt_save.data_selector = 0; // We don't have this.
out->flt_save.mx_csr = fpregs.mxcsr;
out->flt_save.mx_csr_mask = fpregs.mxcr_mask;
my_memcpy(&out->flt_save.float_registers, &fpregs.st_space, 8 * 16);
my_memcpy(&out->flt_save.xmm_registers, &fpregs.xmm_space, 16 * 16);
}
#elif defined(__ARM_EABI__)
uintptr_t ThreadInfo::GetInstructionPointer() const {
return regs.uregs[15];
}
void ThreadInfo::FillCPUContext(RawContextCPU* out) const {
out->context_flags = MD_CONTEXT_ARM_FULL;
for (int i = 0; i < MD_CONTEXT_ARM_GPR_COUNT; ++i)
out->iregs[i] = regs.uregs[i];
// No CPSR register in ThreadInfo(it's not accessible via ptrace)
out->cpsr = 0;
#if !defined(__ANDROID__)
out->float_save.fpscr = fpregs.fpsr |
(static_cast<uint64_t>(fpregs.fpcr) << 32);
// TODO: sort this out, actually collect floating point registers
my_memset(&out->float_save.regs, 0, sizeof(out->float_save.regs));
my_memset(&out->float_save.extra, 0, sizeof(out->float_save.extra));
#endif
}
#elif defined(__aarch64__)
uintptr_t ThreadInfo::GetInstructionPointer() const {
return regs.pc;
}
void ThreadInfo::FillCPUContext(RawContextCPU* out) const {
out->context_flags = MD_CONTEXT_ARM64_FULL_OLD;
out->cpsr = static_cast<uint32_t>(regs.pstate);
for (int i = 0; i < MD_CONTEXT_ARM64_REG_SP; ++i)
out->iregs[i] = regs.regs[i];
out->iregs[MD_CONTEXT_ARM64_REG_SP] = regs.sp;
out->iregs[MD_CONTEXT_ARM64_REG_PC] = regs.pc;
out->float_save.fpsr = fpregs.fpsr;
out->float_save.fpcr = fpregs.fpcr;
my_memcpy(&out->float_save.regs, &fpregs.vregs,
MD_FLOATINGSAVEAREA_ARM64_FPR_COUNT * 16);
}
#elif defined(__mips__)
uintptr_t ThreadInfo::GetInstructionPointer() const {
return mcontext.pc;
}
void ThreadInfo::FillCPUContext(RawContextCPU* out) const {
#if _MIPS_SIM == _ABI64
out->context_flags = MD_CONTEXT_MIPS64_FULL;
#elif _MIPS_SIM == _ABIO32
out->context_flags = MD_CONTEXT_MIPS_FULL;
#else
# error "This mips ABI is currently not supported (n32)"
#endif
for (int i = 0; i < MD_CONTEXT_MIPS_GPR_COUNT; ++i)
out->iregs[i] = mcontext.gregs[i];
out->mdhi = mcontext.mdhi;
out->mdlo = mcontext.mdlo;
out->dsp_control = mcontext.dsp;
out->hi[0] = mcontext.hi1;
out->lo[0] = mcontext.lo1;
out->hi[1] = mcontext.hi2;
out->lo[1] = mcontext.lo2;
out->hi[2] = mcontext.hi3;
out->lo[2] = mcontext.lo3;
out->epc = mcontext.pc;
out->badvaddr = 0; // Not stored in mcontext
out->status = 0; // Not stored in mcontext
out->cause = 0; // Not stored in mcontext
for (int i = 0; i < MD_FLOATINGSAVEAREA_MIPS_FPR_COUNT; ++i)
out->float_save.regs[i] = mcontext.fpregs.fp_r.fp_fregs[i]._fp_fregs;
out->float_save.fpcsr = mcontext.fpc_csr;
#if _MIPS_SIM == _ABIO32
out->float_save.fir = mcontext.fpc_eir;
#endif
}
#endif // __mips__
void ThreadInfo::GetGeneralPurposeRegisters(void** gp_regs, size_t* size) {
assert(gp_regs || size);
#if defined(__mips__)
if (gp_regs)
*gp_regs = mcontext.gregs;
if (size)
*size = sizeof(mcontext.gregs);
#else
if (gp_regs)
*gp_regs = ®s;
if (size)
*size = sizeof(regs);
#endif
}
void ThreadInfo::GetFloatingPointRegisters(void** fp_regs, size_t* size) {
assert(fp_regs || size);
#if defined(__mips__)
if (fp_regs)
*fp_regs = &mcontext.fpregs;
if (size)
*size = sizeof(mcontext.fpregs);
#else
if (fp_regs)
*fp_regs = &fpregs;
if (size)
*size = sizeof(fpregs);
#endif
}
} // namespace google_breakpad