5.1.4. Specifying the entry point to a function

You can set a breakpoint at the entry point of a function with the @entry symbol. This enables you to set a breakpoint on a function without having to open the source file containing that function, and without having to scroll down the Dsm tab to find it.

To set a breakpoint on the entry to a function, specify function\@entry. This identifies the first location in the function after the code that sets up the function parameters. In general, function\@entry refers to either:

If no lines exist that set up any parameters for the function (for example, an embedded assembler function), then the following error message is displayed:


Error: E0039: Line number not found.

As an example, if you have a function func_1(value) you might want to set a breakpoint that triggers only when the argument value has a specific value on entry to the function:


bi,when:{value==2} func_1\@entry

Note

This is different to specifying a function name without the @entry qualifier. For example, in the dhrystone.axf example image:

  • specifying main sets a breakpoint at 0x000083D0, the first address in the function (line 78 in dhry_1.c)

  • specifying main\@entry sets a breakpoint at 0x000083D8, which is the first line of executable code (line 91 in dhry_1.c).

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