HP B1476 68020 User Manual page 178

Debugger/emulator
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Chapter 5: Viewing Code and Data
To display the function calling chain (stack backtrace)
The backtrace window displays the function calling chain, from the compiler
startup routine to the current function in high-level mode.
This window displays (from left to right):
Function Nesting Level. The nesting level of the current function is always
0, the calling function always 1, etc.
You may reference the nesting level when setting a breakpoint. For example,
to cause the program to execute until it returns to the second nested function,
enter the command:
Program Run Until @2
Another way to execute until a stack level is reached is to choose Run Until
Stack Level in the Backtrace window pop-up menu.
Return Address. The return address field displays the return address of the
calling function.
Frame Status Character. One of several characters immediately precedes a
function name in the backtrace window. These frame status characters and
their descriptions are listed in the table below.
154
Function nesting level.
Return address to the calling function.
Frame status character.
Module containing the function.
Function name.

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