Debug Manual

Sample Debug Sessions
Debug Manual—421921-003
F-24
Accelerated Program Example
PMAP Command
We can enter TNS code breakpoints only at memory-exact and register-exact points.
If we enter the PMAP command at a TNS location, we get a set of RISC code output
that corresponds to the set of TNS code that performs the same functions.
Below, the output shows that TNS address %5 is a register-exact point, which
corresponds to RISC address 0x7042001C. (Note that 0x is omitted on the address
output because of space constraints.)
The TNS code and RISC code locations currently have breakpoints. We can see the
instructions that were in the original code by entering the B * command or by clearing
the breakpoints with the C command and entering the PMAP command again.
We are allowed to set TNS code breakpoints only at locations that are register-exact or
memory-exact. To see other TNS locations where we are allowed to set breakpoints,
we can specify the address and the length with the PMAP command, as shown in this
example:
Observe that TNS address %7 is a memory-exact point and that TNS address %13 is
the next register-exact point.
050,03,00032-pmap %05
%000005: @ BPT ADDS +010
7042001C: BREAK INSPECT RISC LUI at,0x7FFF ADD $0,sp,at
050,03,00032-c
050,03,00032-pmap %05
%000005: @ ADDS +035 ADDS +010
7042001C: ADDIU sp,sp,78 LUI at,0x7FFF ADD $0,sp,at
050,03,00032-pmap %5 , #14
%000005: @ ADDS +035 ADDS +010
7042001C: ADDIU sp,sp,78 LUI at,0x7FFF ADD $0,sp,at
%000007: > LDI +000 LDI -010 PUSH 711 XCAL 002
70420028: LI s1,-8 SH $0,-2(sp) SH s1,0(sp)
70420034: JAL 0x7A5D91F0 LI a0,11
%000013: @ STRP 7 LDI +000 LADR G+001 DLLS 01
%000017: LDLI +300 LDI -002 PUSH 733 XCAL 003
7042003C: LI s0,2 LI s2,-16384 LI s3,-2
70420048: ADDIU sp,sp,8 SWL s0,-6(sp) SWR s0,-3(sp)
70420054: SH s2,-2(sp) SH s3,0(sp) JAL 0x7C2CB64C
70420060: LI a0,19