Red Hat ENTERPRISE LINUX 4 - DEVELOPER TOOLS GUIDE, Manual

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Chapter 10. Examining Data 83
64
Use 64 bit memory accesses.
10.13.1.3. Data Cache
The data cache attributes set whether gdb will cache target memory. While this generally improves
performance by reducing debug protocol overhead, it can lead to incorrect results because gdb does
not know about volatile variables or memory mapped device registers.
cache
Enable gdb to cache target memory.
nocache
Disable gdb from caching target memory. This is the default.
10.14. Copy between memory and a file
You can use the commands
dump
,
append
, and
restore
to copy data between target memory and
a file. The
dump
and
append
commands write data to a file, and the
restore
command reads data
from a file back into the inferior’s memory. Files may be in binary, Motorola S-record, Intel hex, or
Tektronix Hex format; however, gdb can only append to binary files.
dump [
format
] memory
filename start_addr end_addr
dump [
format
] value
filename expr
Dump the contents of memory from
start_addr
to
end_addr
, or the value of
expr
, to
filename
in the given format.
The
format
parameter may be any one of:
binary
Raw binary form.
ihex
Intel hex format.
srec
Motorola S-record format.
tekhex
Tektronix Hex format.
gdb uses the same definitions of these formats as the gnu binary utilities, like
objdump
and
objcopy
. If
format
is omitted, gdb dumps the data in raw binary form.