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Diffstat (limited to 'toolkit/crashreporter/google-breakpad/src/processor/stackwalker_ppc.cc')
| -rw-r--r-- | toolkit/crashreporter/google-breakpad/src/processor/stackwalker_ppc.cc | 146 |
1 files changed, 0 insertions, 146 deletions
diff --git a/toolkit/crashreporter/google-breakpad/src/processor/stackwalker_ppc.cc b/toolkit/crashreporter/google-breakpad/src/processor/stackwalker_ppc.cc deleted file mode 100644 index 7e2088440..000000000 --- a/toolkit/crashreporter/google-breakpad/src/processor/stackwalker_ppc.cc +++ /dev/null @@ -1,146 +0,0 @@ -// Copyright (c) 2010 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. - -// stackwalker_ppc.cc: ppc-specific stackwalker. -// -// See stackwalker_ppc.h for documentation. -// -// Author: Mark Mentovai - - -#include "processor/stackwalker_ppc.h" -#include "google_breakpad/processor/call_stack.h" -#include "google_breakpad/processor/memory_region.h" -#include "google_breakpad/processor/stack_frame_cpu.h" -#include "processor/logging.h" - -namespace google_breakpad { - - -StackwalkerPPC::StackwalkerPPC(const SystemInfo* system_info, - const MDRawContextPPC* context, - MemoryRegion* memory, - const CodeModules* modules, - StackFrameSymbolizer* resolver_helper) - : Stackwalker(system_info, memory, modules, resolver_helper), - context_(context) { - if (memory_ && memory_->GetBase() + memory_->GetSize() - 1 > 0xffffffff) { - // This implementation only covers 32-bit ppc CPUs. The limits of the - // supplied stack are invalid. Mark memory_ = NULL, which will cause - // stackwalking to fail. - BPLOG(ERROR) << "Memory out of range for stackwalking: " << - HexString(memory_->GetBase()) << "+" << - HexString(memory_->GetSize()); - memory_ = NULL; - } -} - - -StackFrame* StackwalkerPPC::GetContextFrame() { - if (!context_) { - BPLOG(ERROR) << "Can't get context frame without context"; - return NULL; - } - - StackFramePPC* frame = new StackFramePPC(); - - // The instruction pointer is stored directly in a register, so pull it - // straight out of the CPU context structure. - frame->context = *context_; - frame->context_validity = StackFramePPC::CONTEXT_VALID_ALL; - frame->trust = StackFrame::FRAME_TRUST_CONTEXT; - frame->instruction = frame->context.srr0; - - return frame; -} - - -StackFrame* StackwalkerPPC::GetCallerFrame(const CallStack* stack, - bool stack_scan_allowed) { - if (!memory_ || !stack) { - BPLOG(ERROR) << "Can't get caller frame without memory or stack"; - return NULL; - } - - // The instruction pointers for previous frames are saved on the stack. - // The typical ppc calling convention is for the called procedure to store - // its return address in the calling procedure's stack frame at 8(%r1), - // and to allocate its own stack frame by decrementing %r1 (the stack - // pointer) and saving the old value of %r1 at 0(%r1). Because the ppc has - // no hardware stack, there is no distinction between the stack pointer and - // frame pointer, and what is typically thought of as the frame pointer on - // an x86 is usually referred to as the stack pointer on a ppc. - - StackFramePPC* last_frame = static_cast<StackFramePPC*>( - stack->frames()->back()); - - // A caller frame must reside higher in memory than its callee frames. - // Anything else is an error, or an indication that we've reached the - // end of the stack. - uint32_t stack_pointer; - if (!memory_->GetMemoryAtAddress(last_frame->context.gpr[1], - &stack_pointer) || - stack_pointer <= last_frame->context.gpr[1]) { - return NULL; - } - - // Mac OS X/Darwin gives 1 as the return address from the bottom-most - // frame in a stack (a thread's entry point). I haven't found any - // documentation on this, but 0 or 1 would be bogus return addresses, - // so check for them here and return false (end of stack) when they're - // hit to avoid having a phantom frame. - uint32_t instruction; - if (!memory_->GetMemoryAtAddress(stack_pointer + 8, &instruction) || - instruction <= 1) { - return NULL; - } - - StackFramePPC* frame = new StackFramePPC(); - - frame->context = last_frame->context; - frame->context.srr0 = instruction; - frame->context.gpr[1] = stack_pointer; - frame->context_validity = StackFramePPC::CONTEXT_VALID_SRR0 | - StackFramePPC::CONTEXT_VALID_GPR1; - frame->trust = StackFrame::FRAME_TRUST_FP; - - // frame->context.srr0 is the return address, which is one instruction - // past the branch that caused us to arrive at the callee. Set - // frame_ppc->instruction to four less than that. Since all ppc - // instructions are 4 bytes wide, this is the address of the branch - // instruction. This allows source line information to match up with the - // line that contains a function call. Callers that require the exact - // return address value may access the context.srr0 field of StackFramePPC. - frame->instruction = frame->context.srr0 - 4; - - return frame; -} - - -} // namespace google_breakpad |