2. The PROC Procedures

• The Assembler supports formal construct for defining procedures.

• Assembly-language procedures are similar to C functions.

• The PROC and ENDP directives mark the beginning and the ending of a procedure.

• Additionally, PROC can automatically:

  • Preserve register values that should not change but that the procedure might otherwise alter.

  • Set up a local stack pointer, so that you can access parameters and local variables placed on the stack.

  • Adjust the stack when the procedure ends.