[TBD]Moving 32bit binary to 64 bit

Advantage

• • Bigger address space for a process. 32 bit has max 4GB

gcc change

• • Remove -m32 option in gcc command option for a file compilation

Memory management changes

• • Support of more that 4GB memory if memory management is code's own.

Challenges due to Coder introduced problems

• pointers are assumed as 32bit

  • Example - u32bits var= (u32bits)ptr;

  • Solution -> use <stdint.h> which has portable data types.

  • Passing structure across processes without consideration of portability (without packing)

  • Assumption that long and pointers both are of 32 bits

  • Use of assembly code

    • Function argument passing order

    • Use of register