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docs: Document hexdump command

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Signed-off-by: Glenn Washburn <development@efficientek.com>
Reviewed-by: Oskari Pirhonen <xxc3ncoredxx@gmail.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
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Glenn Washburn 2023-07-26 13:50:11 -05:00 committed by Daniel Kiper
parent 2e1279af2b
commit 7ff4f3c963
1 changed files with 15 additions and 1 deletions
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docs/grub.texi
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@ -4327,6 +4327,7 @@ you forget a command, you can run the command @command{help}
* halt:: Shut down your computer
* hashsum:: Compute or check hash checksum
* help:: Show help messages
* hexdump:: Show raw contents of a file or memory
* insmod:: Insert a module
* keystatus:: Check key modifier status
* list_env:: List variables in environment block
@ -4945,6 +4946,20 @@ about each of the commands whose names begin with those @var{patterns}.
@end deffn
@node hexdump
@subsection hexdump
@deffn Command hexdump [--skip offset] [--length len] FILE_OR_DEVICE
Show raw contents of a file or memory. When option @option{--skip} is given,
@samp{offset} number of bytes are skipped from the start of the device or
file given. And @option{--length} allows specifying a maximum number of bytes
to be shown.
If given the special device named @samp{(mem)}, then the @samp{offset} given to
@option{--skip} is treated as the address of a memory location to dump from.
@end deffn
@node insmod
@subsection insmod
@ -6131,7 +6146,6 @@ GRUB shell may provide more information on parameters and usage.
@item @command{gdbstub} - Start GDB stub on given port
@item @command{gdbstub_stop} - Stop GDB stub
@item @command{hdparm} - Get/set ATA disk parameters.
@item @command{hexdump} - Show raw contents of a file or memory.
@item @command{hexdump_random} - Hexdump random data.
@item @command{inb} - Read 8-bit value from PORT.
@item @command{inl} - Read 32-bit value from PORT.