Red Hat ENTERPRISE LINUX 4 - DEVELOPER TOOLS GUIDE, Руководство пользователя

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230 Chapter 26. The gdb/mi Interface
byte-offset
An offset to add to the
address
before fetching memory.
This command displays memory contents as a table of
nr-rows
by
nr-cols
words, each word
being
word-size
bytes. In total,
nr-rows
*
nr-cols
*
word-size
bytes are read (returned as
total-bytes
). Should less than the requested number of bytes be returned by the target, the missing
words are identified using
N/A
. The number of bytes read from the target is returned in
nr-bytes
and the starting address used to read memory in
addr
.
The address of the next/previous row or page is available in
next-row
and
prev-row
,
next-page
and
prev-page
.
26.9.6.2. gdb Command
The corresponding gdb command is
x
.
gdbtk
has
gdb_get_mem
memory read command.
26.9.6.3. Example
Read six bytes of memory starting at
bytes+6
but then offset by
-6
bytes. Format as three rows of
two columns. One byte per word. Display each word in hex.
(gdb)
9-data-read-memory -o -6 -- bytes+6 x 1 3 2
9^done,addr="0x00001390",nr-bytes="6",total-bytes="6",
next-row="0x00001396",prev-row="0x0000138e",next-page="0x00001396",
prev-page="0x0000138a",memory=[
{addr="0x00001390",data=["0x00","0x01"]},
{addr="0x00001392",data=["0x02","0x03"]},
{addr="0x00001394",data=["0x04","0x05"]}]
(gdb)
Read two bytes of memory starting at address
64
and display as a single word formatted
in decimal.
(gdb)
5-data-read-memory 64 d 2 1 1
5^done,addr="0x00001510",nr-bytes="2",total-bytes="2",
next-row="0x00001512",prev-row="0x0000150e",
next-page="0x00001512",prev-page="0x0000150e",memory=[
{addr="0x00001510",data=["128"]}]
(gdb)
Read thirty two bytes of memory starting at
bytes+16
and format as eight rows of four columns.
Include a string encoding with
x
used as the non-printable character.
(gdb)
4-data-read-memory bytes+16 x 1 8 4 x
4^done,addr="0x000013a0",nr-bytes="32",total-bytes="32",
next-row="0x000013c0",prev-row="0x0000139c",
next-page="0x000013c0",prev-page="0x00001380",memory=[
{addr="0x000013a0",data=["0x10","0x11","0x12","0x13"],ascii="xxxx"},
{addr="0x000013a4",data=["0x14","0x15","0x16","0x17"],ascii="xxxx"},
{addr="0x000013a8",data=["0x18","0x19","0x1a","0x1b"],ascii="xxxx"},
{addr="0x000013ac",data=["0x1c","0x1d","0x1e","0x1f"],ascii="xxxx"},