GCCS97 #323 Proceedings of the GCC Developers Summit 2007

From http://ols.108.redhat.com/2007/GCC-Reprints/GCC2007-Proceedings.pdf . stack pointer, frame pointer, and saved registers. This works for most functions with a fixed-size stack frame or a stationary frame pointer—any function where the first several instructions set up a frame that lasts throughout the function. Even multiple entry points are not a problem. G.D.B can analyze one entry point, and the others either set up compatible stack frames or jump to the common entry point. On some architectures prologue analysis is not powerful enough to locate the stack frame and saved registers reliably. For instance, on the x86_64 architecture, optimized code may not use a frame pointer, yet may still push and pop the stack