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Debugging with GDB

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24.11 GDB/MI Target Manipulation Commands

The -target-attach Command

Synopsis

 
 -target-attach pid | file

Attach to a process pid or a file file outside of GDB.

GDB command

The corresponding GDB command is `attach'.

Example

N.A.

The -target-compare-sections Command

Synopsis

 
 -target-compare-sections [ section ]

Compare data of section section on target to the exec file. Without the argument, all sections are compared.

GDB Command

The GDB equivalent is `compare-sections'.

Example

N.A.

The -target-detach Command

Synopsis

 
 -target-detach

Disconnect from the remote target. There's no output.

GDB command

The corresponding GDB command is `detach'.

Example

 
(gdb)
-target-detach
^done
(gdb)

The -target-download Command

Synopsis

 
 -target-download

Loads the executable onto the remote target. It prints out an update message every half second, which includes the fields:

`section'
The name of the section.
`section-sent'
The size of what has been sent so far for that section.
`section-size'
The size of the section.
`total-sent'
The total size of what was sent so far (the current and the previous sections).
`total-size'
The size of the overall executable to download.

Each message is sent as status record (see section GDB/MI Output Syntax).

In addition, it prints the name and size of the sections, as they are downloaded. These messages include the following fields:

`section'
The name of the section.
`section-size'
The size of the section.
`total-size'
The size of the overall executable to download.

At the end, a summary is printed.

GDB Command

The corresponding GDB command is `load'.

Example

Note: each status message appears on a single line. Here the messages have been broken down so that they can fit onto a page.

 
(gdb)
-target-download
+download,{section=".text",section-size="6668",total-size="9880"}
+download,{section=".text",section-sent="512",section-size="6668",
total-sent="512",total-size="9880"}
+download,{section=".text",section-sent="1024",section-size="6668",
total-sent="1024",total-size="9880"}
+download,{section=".text",section-sent="1536",section-size="6668",
total-sent="1536",total-size="9880"}
+download,{section=".text",section-sent="2048",section-size="6668",
total-sent="2048",total-size="9880"}
+download,{section=".text",section-sent="2560",section-size="6668",
total-sent="2560",total-size="9880"}
+download,{section=".text",section-sent="3072",section-size="6668",
total-sent="3072",total-size="9880"}
+download,{section=".text",section-sent="3584",section-size="6668",
total-sent="3584",total-size="9880"}
+download,{section=".text",section-sent="4096",section-size="6668",
total-sent="4096",total-size="9880"}
+download,{section=".text",section-sent="4608",section-size="6668",
total-sent="4608",total-size="9880"}
+download,{section=".text",section-sent="5120",section-size="6668",
total-sent="5120",total-size="9880"}
+download,{section=".text",section-sent="5632",section-size="6668",
total-sent="5632",total-size="9880"}
+download,{section=".text",section-sent="6144",section-size="6668",
total-sent="6144",total-size="9880"}
+download,{section=".text",section-sent="6656",section-size="6668",
total-sent="6656",total-size="9880"}
+download,{section=".init",section-size="28",total-size="9880"}
+download,{section=".fini",section-size="28",total-size="9880"}
+download,{section=".data",section-size="3156",total-size="9880"}
+download,{section=".data",section-sent="512",section-size="3156",
total-sent="7236",total-size="9880"}
+download,{section=".data",section-sent="1024",section-size="3156",
total-sent="7748",total-size="9880"}
+download,{section=".data",section-sent="1536",section-size="3156",
total-sent="8260",total-size="9880"}
+download,{section=".data",section-sent="2048",section-size="3156",
total-sent="8772",total-size="9880"}
+download,{section=".data",section-sent="2560",section-size="3156",
total-sent="9284",total-size="9880"}
+download,{section=".data",section-sent="3072",section-size="3156",
total-sent="9796",total-size="9880"}
^done,address="0x10004",load-size="9880",transfer-rate="6586",
write-rate="429"
(gdb)

The -target-exec-status Command

Synopsis

 
 -target-exec-status

Provide information on the state of the target (whether it is running or not, for instance).

GDB Command

There's no equivalent GDB command.

Example

N.A.

The -target-list-available-targets Command

Synopsis

 
 -target-list-available-targets

List the possible targets to connect to.

GDB Command

The corresponding GDB command is `help target'.

Example

N.A.

The -target-list-current-targets Command

Synopsis

 
 -target-list-current-targets

Describe the current target.

GDB Command

The corresponding information is printed by `info file' (among other things).

Example

N.A.

The -target-list-parameters Command

Synopsis

 
 -target-list-parameters

GDB Command

No equivalent.

Example

N.A.

The -target-select Command

Synopsis

 
 -target-select type parameters ...

Connect GDB to the remote target. This command takes two args:

`type'
The type of target, for instance `async', `remote', etc.
`parameters'
Device names, host names and the like. See section Commands for managing targets, for more details.

The output is a connection notification, followed by the address at which the target program is, in the following form:

 
^connected,addr="address",func="function name",
  args=[arg list]

GDB Command

The corresponding GDB command is `target'.

Example

 
(gdb)
-target-select async /dev/ttya
^connected,addr="0xfe00a300",func="??",args=[]
(gdb)


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