/*
 * Copyright 2005, Ingo Weinhold, bonefish@users.sf.net.
 * Copyright 2012, Alex Smith, alex@alex-smith.me.uk.
 * Distributed under the terms of the MIT License.
 */


#include <debug_support.h>

#include "arch_debug_support.h"


struct stack_frame {
        struct stack_frame      *previous;
        void                            *return_address;
};


status_t
arch_debug_get_instruction_pointer(debug_context *context, thread_id thread,
        void **ip, void **stackFrameAddress)
{
        // get the CPU state
        debug_cpu_state cpuState;
        status_t error = debug_get_cpu_state(context, thread, NULL, &cpuState);
        if (error != B_OK)
                return error;

        *ip = (void*)cpuState.rip;
        *stackFrameAddress = (void*)cpuState.rbp;

        return B_OK;
}


status_t
arch_debug_get_stack_frame(debug_context *context, void *stackFrameAddress,
        debug_stack_frame_info *stackFrameInfo)
{
        stack_frame stackFrame;
        ssize_t bytesRead = debug_read_memory(context, stackFrameAddress,
                &stackFrame, sizeof(stackFrame));
        if (bytesRead < B_OK)
                return bytesRead;
        if (bytesRead != sizeof(stackFrame))
                return B_ERROR;

        stackFrameInfo->frame = stackFrameAddress;
        stackFrameInfo->parent_frame = stackFrame.previous;
        stackFrameInfo->return_address = stackFrame.return_address;
        return B_OK;
}