src/kits/debug/arch/x86_64/arch_debug_support.cpp

   1 /*
   2  * Copyright 2005, Ingo Weinhold, bonefish@users.sf.net.
   3  * Copyright 2012, Alex Smith, alex@alex-smith.me.uk.
   4  * Distributed under the terms of the MIT License.
   5  */
   6
   7
   8 #include <debug_support.h>
   9
  10 #include "arch_debug_support.h"
  11
  12
  13 struct stack_frame {
  14         struct stack_frame      *previous;
  15         void                            *return_address;
  16 };
  17
  18
  19 status_t
  20 arch_debug_get_instruction_pointer(debug_context *context, thread_id thread,
  21         void **ip, void **stackFrameAddress)
  22 {
  23         // get the CPU state
  24         debug_cpu_state cpuState;
  25         status_t error = debug_get_cpu_state(context, thread, NULL, &cpuState);
  26         if (error != B_OK)
  27                 return error;
  28
  29         *ip = (void*)cpuState.rip;
  30         *stackFrameAddress = (void*)cpuState.rbp;
  31
  32         return B_OK;
  33 }
  34
  35
  36 status_t
  37 arch_debug_get_stack_frame(debug_context *context, void *stackFrameAddress,
  38         debug_stack_frame_info *stackFrameInfo)
  39 {
  40         stack_frame stackFrame;
  41         ssize_t bytesRead = debug_read_memory(context, stackFrameAddress,
  42                 &stackFrame, sizeof(stackFrame));
  43         if (bytesRead < B_OK)
  44                 return bytesRead;
  45         if (bytesRead != sizeof(stackFrame))
  46                 return B_ERROR;
  47
  48         stackFrameInfo->frame = stackFrameAddress;
  49         stackFrameInfo->parent_frame = stackFrame.previous;
  50         stackFrameInfo->return_address = stackFrame.return_address;
  51         return B_OK;
  52 }