Computer system having integrated source level debugging functio

Details Computer system having integrated source level debugging functio Computer system having integrated source level debugging functio

1993-10-19

1994-10-18

Shaw, Gareth D.

Boots, shoes, and leggings

364DIG1, 36426791, G06F 1100

Patent

active

053576284

ABSTRACT:
A system management mode (SMM), an external dedicated system management memory (SMRAM), a system management interrupt (SMI), a SMI service handler with an integrated debugger, a Resume instruction (RSM), and at least one way for triggering a SMI as a result of a debugging request is provided to a computer system. Debugging is performed under SMM with the integrated debugger which is stored with the SMI handler in the SMRAM and given control after the SMI handler has gotten control and determined in its initial processings that the SMI handler has gotten control as a result of a SMI triggered by a debugging request. The SMI handler gets control after the computer system is put into SMM in response to the SMI. Upon exiting the integrated debugger, the SMI handler executes the RSM instruction to continue execution with the interrupted program. As a result, debugging may be performed with the actual hardware in its normal operating speed, and yet debugging functions and usability matching or exceeding that of a software emulator may be provided. Additionally, debugging may be performed in a manner that is transparent to the operating system and the application programs.

REFERENCES:
patent: 4819234 (1989-04-01), Kuber
patent: 5175853 (1992-12-01), Kardach et al.
Source-Level In-Circuit Software Code Debugging Instrument.

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