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@@ -1,149 +1,149 @@
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 .Dd June 24, 2022
 .Dt DB_COMMAND 9
 .Os
 .Sh NAME
 .Nm DB_COMMAND ,
 .Nm DB_COMMAND_FLAGS ,
 .Nm DB_SHOW_COMMAND ,
 .Nm DB_SHOW_COMMAND_FLAGS ,
 .Nm DB_SHOW_ALL_COMMAND ,
 .Nm DB_ALIAS ,
 .Nm DB_ALIAS_FLAGS ,
 .Nm DB_SHOW_ALIAS ,
 .Nm DB_SHOW_ALIAS_FLAGS ,
 .Nm DB_SHOW_ALL_ALIAS
 .Nd Extends the ddb command set
 .Sh SYNOPSIS
 .In ddb/ddb.h
 .Fn DB_COMMAND "command_name" "command_function"
 .Fn DB_COMMAND_FLAGS "command_name" "command_function" "flags"
 .Fn DB_SHOW_COMMAND "command_name" "command_function"
 .Fn DB_SHOW_COMMAND_FLAGS "command_name" "command_function" "flags"
 .Fn DB_SHOW_ALL_COMMAND "command_name" "command_function"
 .Fn DB_ALIAS "alias_name" "command_function"
 .Fn DB_ALIAS_FLAGS "alias_name" "command_function" "flags"
 .Fn DB_SHOW_ALIAS "alias_name" "command_function"
 .Fn DB_SHOW_ALIAS_FLAGS "alias_name" "command_function" "flags"
 .Fn DB_SHOW_ALL_ALIAS "alias_name" "command_function"
 .Sh DESCRIPTION
 The
 .Fn DB_COMMAND
 macro adds
 .Fa command_name
 to the list of top-level commands.
 Invoking
 .Fa command_name
 from ddb will call
 .Fa command_function .
 .Pp
 The
 .Fn DB_SHOW_COMMAND
 and
 .Fn DB_SHOW_ALL_COMMAND
 macros are roughly equivalent to
 .Fn DB_COMMAND
 but in these cases,
 .Fa command_name
 is a sub-command of the ddb
 .Sy show
 command and
 .Sy show all
 command, respectively.
 .Pp
 The
 .Fn DB_ALIAS ,
 .Fn DB_SHOW_ALIAS ,
 and
 .Fn DB_SHOW_ALL_ALIAS
-macros register the exsting
+macros register the existing
 .Fa command_function
 under the alternative command name
 .Fa alias_name .
 .Pp
 The _FLAGS variants of these commands allow the programmer to specify a value
 for the
 .Fa flag
 field of the command structure.
 The possible flag values are defined alongside
 .Ft struct db_command
 in
 .In ddb/ddb.h .
 .Pp
 The general command syntax:
 .Cm command Ns Op Li \&/ Ns Ar modifier
 .Ar address Ns Op , Ns Ar count ,
 translates into the following parameters for
 .Fa command_function :
 .Bl -tag -width Fa -offset indent
 .It Fa addr
 The address passed to the command as an argument.
 .It Fa have_addr
 A boolean value that is true if the addr field is valid.
 .It Fa count
 The number of quad words starting at offset
 .Fa addr
 that the command must process.
 .It Fa modif
 A pointer to the string of modifiers.
 That is, a series of symbols used to pass some options to the command.
 For example, the
 .Sy examine
 command will display words in decimal form if it is passed the modifier "d".
 .El
 .Sh EXAMPLES
 In your module, the command is declared as:
 .Bd -literal
 DB_COMMAND(mycmd, my_cmd_func)
 {
 	if (have_addr)
 		db_printf("Calling my command with address %p\\n", addr);
 }
 .Ed
 .Pp
 An alias for this command is declared as:
 .Bd -literal
 DB_ALIAS(mycmd2, my_cmd_func);
 .Ed
 .Pp
 Then, when in ddb:
 .Bd -literal
 .Bf Sy
 db> mycmd 0x1000
 Calling my command with address 0x1000
 db> mycmd2 0x2500
 Calling my command with address 0x2500
 db>
 .Ef
 .Ed
 .Sh SEE ALSO
 .Xr ddb 4
 .Sh AUTHORS
 This manual page was written by
 .An Guillaume Ballet Aq Mt gballet@gmail.com .