# Annotations

Annotations are a method for embedding display markup in Ghidra fields, such as comments. An annotation is written with a strict syntax, which when rendered will have a display value as defined by the particular annotation used. Furthermore, some annotations add functionality, such as making the display text a hyperlink.

The following text shows the syntax of a sample URL annotation:

    	{@url "http://www.google.com" "Search Web"}

The bold text is required for all annotations. The italicized text is required but is specific to the annotation being used (see the table below). The optional rendered display text "Search Web" will be displayed in listing. If the optional display test is omitted, the URL will be displayed. Quotes around display text are optional.

## Examples

> URL Annotation Example

> The image above shows a URL annotation in its text form as entered into the EOL Comment tab of the Comments dialog.
> The image below shows how the annotation is rendered in Ghidra.

> Rendered URL Annotation Example

> When the URL text (e.g., "http://www.google.com") in the above image is clicked from within Ghidra, a web browser is launched and attempts to load the corresponding web page.

> If the URL text corresponds to a Ghidra URL and attempt will be made to open the referenced Program file within the Code Browser. Such a URL may refer to a Program file from a local project or Ghidra Server. The Ghidra URL forms supported include:

> Remote Ghidra Server file
> ghidra://<host>[:<port>]/<repository-name>/<program-path>[#<address-or-symbol-ref>]
> Example: ghidra://hostname/Repo/notepad.exe#entry

> Local Ghidra project file
> ghidra:/[<project-path>/]<project-name>?/<program-path>[#<address-or-symbol-ref>]
> Example: ghidra:/share/MyProject?/notepad.exe#entry

## Valid Annotations

> The following is a table of supported annotations:

> Name | Description | Parameter List | Accepted Keywords | Examples
> --- | --- | --- | --- | ---
> Symbol | Displays the text of the given symbol or the current name of the primary symbol for a given address as a hyperlink. Notes: If you provide a symbol name and not an address, then you will need to fully-qualify the symbol name if it is not in the global namespace (e.g., FunctionFoo::param1 to link to a specific function parameter). If you specify a symbol name instead of an address, then the text of the comment will be changed to use the address of that symbol. | address or symbol name | @symbol @sym | {@symbol "0x1001004a"} {@symbol "fred"} {@sym "100100fe"}
> Address | Displays the given address value as a hyperlink. | address [display text] | @address @addr | {@address "1001004a"} {@addr "0x0100100c"} {@address "01001004a" "my special address"}
> URL | Displays the given URL has a hyperlink. This annotation optionally takes display text so that the hyperlink may be displayed with text other than that of the URL. References to a program file on a Ghidra Server (ghidra://<host...) or local project (ghidra:/<project-...) will be opened within the Listing display, while all other URL forms (e.g., http://, https://, file://, etc.) will be launched via an external web browser (see command configuration for Processor Manuals). | URL [display text] | @url @hyperlink @href @link | {@url "http://www.google.com"} {@url "http://www.google.com" "google"} {@url "http://www.google.com" "click here for google"} {@url "ghidra://myserver/Repo/notepad.exe"} {@url "ghidra://myserver/Repo/notepad.exe#entry"} {@url "ghidra://myserver/Repo/notepad.exe" "see notepad.exe"} {@url "ghidra:/share/MyProject?/notepad.exe#entry"} {@url "ghidra:/share/MyProject?/notepad.exe" "see notepad.exe"}
> Program | Displays a hyperlink to the given Ghidra program pathname with the current project. Referenced program will open in a new Listing tab when clicked. You may optionally provide an address or symbol to be displayed when the program is opened by appending to the program name an '@' character, followed by an address or symbol name. | program name (with optional address or symbol) [display text] | @program | {@program "WinHelloCPP.exe"} {@program "WinHelloCPP.exe@01001234"} {@program "WinHelloCPP.exe@some_label"} {@program "WinHelloCPP.exe@SomeFunction::some_label"} {@program "WinHelloCPP.exe" "Click here to open WinHelloCPP"} {@program "subfolder/WinHelloCPP.exe"} {@program "subfolder1/subfolder2/WinHelloCPP.exe"}
> Variable | Displays the text of the given variable or parameter for a given function as a hyperlink. Notes: This annotation will modify itself to use the variable and function address to survive renaming of the variable and the function. | variable/parameter name (@variable) or hash identifier [function name or address] | @variable @var | {@variable "i"} {@var "argv" "main"}
> Discovered Annotations | Ghidra may discover new annotations that are provided by Ghidra plugins. Consult the documentation of the respective plugins for more information regarding the discovered annotations.

> All annotations support double quotes (") around content inside of the annotation tag, excluding the @name part of the tag. Further, some annotations require quotes, as listed in the table above (e.g., the Execute annotation requires quotes). It is considered good practice to quote all annotation parameter values.

> When pressing the Add Annotation button, any selected text in the comment dialog will be added to the generated annotation. This is useful if you wish to pre-selected content, such as address text, to be converted into an annotation.

## Errors

> If there is a problem parsing an annotation then an error message will be printed in place of the annotations.

> Invalid Annotation Text Entry

> Rendered Invalid Annotation Example

Related Topics:

- Comments Plugin