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      1 // Copyright 2014, VIXL authors
      2 // All rights reserved.
      3 //
      4 // Redistribution and use in source and binary forms, with or without
      5 // modification, are permitted provided that the following conditions are met:
      6 //
      7 //   * Redistributions of source code must retain the above copyright notice,
      8 //     this list of conditions and the following disclaimer.
      9 //   * Redistributions in binary form must reproduce the above copyright notice,
     10 //     this list of conditions and the following disclaimer in the documentation
     11 //     and/or other materials provided with the distribution.
     12 //   * Neither the name of ARM Limited nor the names of its contributors may be
     13 //     used to endorse or promote products derived from this software without
     14 //     specific prior written permission.
     15 //
     16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS CONTRIBUTORS "AS IS" AND
     17 // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     18 // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     19 // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
     20 // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21 // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     22 // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
     23 // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24 // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     25 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26 
     27 #include "examples.h"
     28 
     29 
     30 // This is an interactive example, not to be used for testing.
     31 #ifndef TEST_EXAMPLES
     32 
     33 #define __ masm->
     34 
     35 // The aim is to let the user "play" with the debugger. Brk will trigger the
     36 // debugger shell.
     37 void GenerateBreak(MacroAssembler* masm) {
     38   Label hop;
     39   __ Brk();
     40   __ Nop();
     41   __ B(&hop);
     42   __ Nop();
     43   __ Bind(&hop);
     44   __ Mov(x1, 123);
     45   __ Mov(x2, 456);
     46   __ Add(x0, x1, x2);
     47   __ Ret();
     48 }
     49 
     50 
     51 #ifdef VIXL_INCLUDE_SIMULATOR_AARCH64
     52 int main(void) {
     53   MacroAssembler masm;
     54   Decoder decoder;
     55   Debugger debugger(&decoder);
     56 
     57   // Generate the code for the example function.
     58   Label start;
     59   masm.Bind(&start);
     60   GenerateBreak(&masm);
     61   masm.FinalizeCode();
     62 
     63   // Run the example function.
     64   debugger.RunFrom(masm.GetLabelAddress<Instruction*>(&start));
     65   printf("Debugger example run\n");
     66 
     67   return 0;
     68 }
     69 #else
     70 // Without the simulator there is nothing to test.
     71 int main(void) { return 0; }
     72 #endif  // VIXL_INCLUDE_SIMULATOR_AARCH64
     73 #endif  // TEST_EXAMPLES
     74