src/kits/debug/arch/x86/arch_debug_support.cpp

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