Mixed C and Assembler Applications

To build mixed C and Assembler applications, you have to know how the C Compiler uses registers and calls procedures. The following sections will describe this for compatibility with the compiler. If you are working with another vendor's ANSI-C compiler, refer to your Compiler Manual to get the information about parameter passing rules.

When you intend to mix Assembly source file and ANSI-C source files in a single application, the following issues are important:

• Memory models
  
• Parameter passing scheme
  
• Return Value
  
• Accessing assembly variables in an ANSI-C source file
  
• Accessing ANSI-C variables in an assembly source file
  
• Invoking an assembly function in an ANSI-C source file
  
• Support for structured types
  
• Structured type: Limitations