A soft breakpoint simulation method for debugging in norflash program space

Abstract

The invention discloses a soft breakpoint simulation method during NorFlash program space debugging. The method comprises the following steps: (1) encoding a soft breakpoint instruction in an all-zero encoding format at a processor encoding phase; (2) calling a breakpoint instruction insertion unit by a debugger at a NorFlash program space debugging phase when the debugger requests a breakpoint instruction to be inserted into a program space, wherein the unit inserts a soft breakpoint instruction of the processor by utilizing the characteristic that the specified locations in a NorFlash space can be written from 1 to 0 according to specified length, namely all 0s can be written in; (3) judging whether an instruction at the current PC is matched with a breakpoint address in a soft breakpoint instruction list when the debugger receives a debugging request of a running program; (4) judging whether the soft breakpoint instruction address is matched with all soft breakpoint addresses in a soft breakpoint module by the debugger when the processor encounters the soft breakpoint instruction during running. The soft breakpoint simulation method disclosed by the invention is high in debugging efficiency and high in applicability.

Description

technical field [0001] The invention belongs to the field of debugging of a processor NorFlash program space, and in particular relates to a method for realizing a soft breakpoint in the debugging of a RISC embedded processor NorFlash program space. Background technique [0002] In the development of embedded systems based on RISC processors, the read-only space (NorFlash, E 2 The development of PROM, etc.) is essential. After almost all embedded devices are developed, they need to burn the code into the read-only space, so that the embedded device can be powered on and run directly on the Flash, and then it can work. Features. Among read-only devices, NorFlash is favored by embedded devices for its linear address addressing and directly executable instructions. [0003] For the RAM space, since the content of the space can be modified at will, developers only need to set soft breakpoints to control the running of the program. After the soft breakpoint is set, the first t...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings of low debugging efficiency and poor applicability in NorFlash program space in existing embedded development, the present invention provides a soft breakpoint simulation method for debugging in NorFlash program space with high debugging efficiency and good applicability

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