What is Eabi?

In the kernel, the interview with Eabi and oabi is actually relative to the method of system calling. Of course, the system we call is limited to the arm system. What is Eabi about Eabi? Embedded Application binary interface (Embedded Application binary Interface) describes the connection, execution, and debugging of the target code, library target code, executable file images, and how to connect, execute, and debug the target code generation process, and C, C ++ language interfaces are the basic specification for compiling connection tools and the basis for studying their working principles. Unfortunately, arm's Eabi has not been fully set so far. As part of Eabi, there are process calling specifications, executable file format specifications, C/C ++ Abi specifications, and debugging format specifications. Eabi: this is a new system call method mov R7, # numswi 0x0. The original system call method is as follows: SWI (# num | 0x900000) (0x900000 is a magic value) That is to say, the original call method (old Abi) is implemented by following the call number in the SWI command, and now it is based on the value in R7.