GitLab

- Add function string_from_mem to read string from

a function, named printInfo, is added to simulator.h. It prints out the registers value. This function is called 2 times. when we have a break point, for Fault injection, and when the simulation execution is done.

Use option -b for adding a breakpoint at a given cycle number. Use -e 
for adding a maximal number of cycle to run.

Merging changes to header styles

- Moved DRAM_SIZE from core.h to basic_simulator.h
- changed c headers with c++ headers (stdio.h -> cstdio)
- use "" instead of <> for local includes

- Changed the interface of BasicSimulator to take file names
  as std::strings
- Added helper function to open file and check for fopen errors
- Added helper function to open file or assign default if file name
  is an empty string

- BasicSimulator memory is now a single vector of ac_int
- Introduced helper function setByte to write bytes of the simulator
  memory without going through the core
- The constructor now initialises the memory without going throug the
  core.dm or core.im
- Simplified reading of the elf sections
- Refactored code that poulates the stack with command line arguments

Elf file refactoring

See merge request !2

- Changed vector<>* to plain vector<>
- Use unique_ptr for the vector elements
- cleaned up the destructor
- refactored some for loops to modern c++ for loops

Riscv-compliance(signature output/makefile/linker/...)+debugging print+BasicSimulator Elf File modif

- c++ loops for reading the elf and looking for start section
- removed redundant zeroing of core.cycle and core.regFile
- TODO: maybe it would be better to replace stw, stb etc.,  in the
  basic simulator constructor, as those methods also fill the cache

Fixed some comparison between unsigned and signed integers

Removed unused variables in core pipeline stages

Removed unused variables