Debug Manual

Debug Commands
Debug Manual—421921-003
4-27
Set Conditional Memory-Access Breakpoint
access
indicates the type of memory access that triggers the breakpoint.Valid options
depend on the type of processor you are using, as noted in the following list:
register
is a processor register. For more information on this parameter, see Register
Syntax on page 3-7.
For a TNS process, when registers R0 through R7 are specified, the values in the
registers are evaluated when the breakpoint is executed. Other registers are
evaluated to a memory location pointed to by the registers when the breakpoint is
executed.
For a TNS/R process, any register except the floating-point registers can be used.
test-address
is the address of the variable to be compared with constant. The syntax for
test-address is the same as the syntax for Address Syntax on page 3-12.
However, test-address is limited to data locations only (it cannot access UC,
UL, SC, SL, and C). For more information, see Address Syntax on page 3-12. If
address is an N-mode address, test-address refers to a 32-bit variable.
mask
is an expression. The mask parameter is logically ANDed with the value of the
register parameter or the value pointed to by test-address and constant
before the condition is tested. The comparison values are treated as signed
values. The value for mask is 32 bits if a TNS/R register or an N-mode test-
address value is used; otherwise, the value is 16 bits.
If you omit mask, Debug uses -1 (0xFFFF for a 16-bit constant or 0xFFFFFFFF
for a 32-bit constant).
op
is a relational operator and must be one of the following:
R Break on a read access
RW Break on a read/write access
WR Break on a read/write access; equivalent to RW
W Break on a write access
< break if the variable is less than constant. This operator does a
signed comparison.