From the source:

frysk-core/frysk/pkglibdir/funit-watchpoint.S

source is a global variable in the .data section. In FHPD do a: print source.
source should be resolved, but isn't. Reproducer.

[pmuldoon@localhost frysk_bin]$ ./frysk-core/frysk/bindir/fhpd
frysk-core/frysk/pkglibdir/funit-watchpoint
[0.0] Loaded executable file:
/home/pmuldoon/frysk_bin/frysk-core/frysk/pkglibdir/funit-watchpoint
(fhpd) start
Attached to process 26465
starting with this command: frysk-core/frysk/pkglibdir/funit-watchpoint
(fhpd) break main
breakpoint 0
(fhpd) go
Running process 26465
(fhpd) Breakpoint 0 main 0x400468

(fhpd) list
[0.0]
    41   
    42   // Function to write to a global var memory address and then exit.
    43   // This tests the ability of a the watchpoint code to catch
    44   // a dead simple and basic watchpoint test condition. If the
    45   // program exits before the Watchpoint fired, the test fails.
    46   //
    47   // This program is normally started, blocked at entry. Then the 
    48   // watchpoint is applied in the debugger. Then the program is set
    49   // to continue.
    50   FUNCTION_BEGIN(main,0)
->  51   MAIN_PROLOGUE(0)
    52   NOP
    53   
    54   // Load source variables address into GPR 1
    55   LOAD_IMMED_BYTE (REG1, source)
    56   
    57   // Load the literal value 0x77 into GPR3. The value isn't important
    58   // the actual writing of the data is.
    59   LOAD_IMMED_BYTE (REG3, 0x77)
    60   
(fhpd) print source
Error: Object source was not found