| .. SPDX-License-Identifier: GPL-2.0+: |
| |
| .. index:: |
| single: md (command) |
| |
| md command |
| ========== |
| |
| Synopsis |
| -------- |
| |
| :: |
| |
| md <address>[<data_size>] [<length>] |
| |
| Description |
| ----------- |
| |
| The md command is used to dump the contents of memory. It uses a standard |
| format that includes the address, hex data and ASCII display. It supports |
| various data sizes and uses the endianness of the target. |
| |
| The specified data_size and length become the defaults for future memory |
| commands commands. |
| |
| address |
| start address to display |
| |
| data_size |
| size of each value to display (defaults to .l): |
| |
| ========= =================== |
| data_size Output size |
| ========= =================== |
| .b byte |
| .w word (16 bits) |
| .l long (32 bits) |
| .q quadword (64 bits) |
| ========= =================== |
| |
| length |
| number of values to dump. Defaults to 40 (0d64). Note that this is not |
| the same as the number of bytes, unless .b is used. |
| |
| Note that the format of 'md.b' can be emulated from linux with:: |
| |
| # This works but requires using sed to get the extra spaces |
| # <addr> is the address, <f> is the filename |
| xxd -o <addr> -g1 <f> |sed 's/ / /' >bad |
| |
| # This uses a single tool but the offset always starts at 0 |
| # <f> is the filename |
| hexdump -v -e '"%08.8_ax: " 16/1 "%02x " " "' -e '16/1 "%_p" "\n" ' <f> |
| |
| |
| Example |
| ------- |
| |
| :: |
| |
| => md 10000 |
| 00010000: 00010000 00000000 f0f30f00 00005596 .............U.. |
| 00010010: 10011010 00000000 10011010 00000000 ................ |
| 00010020: 10011050 00000000 b96d4cd8 00007fff P........Lm..... |
| 00010030: 00000000 00000000 f0f30f18 00005596 .............U.. |
| 00010040: 10011040 00000000 10011040 00000000 @.......@....... |
| 00010050: b96d4cd8 00007fff 10011020 00000000 .Lm..... ....... |
| 00010060: 00000003 000000c3 00000000 00000000 ................ |
| 00010070: 00000000 00000000 f0e892f3 00005596 .............U.. |
| 00010080: 00000000 000000a1 00000000 00000000 ................ |
| 00010090: 00000000 00000000 f0e38aa6 00005596 .............U.. |
| 000100a0: 00000000 000000a6 00000022 00000000 ........"....... |
| 000100b0: 00000001 00000000 f0e38aa1 00005596 .............U.. |
| 000100c0: 00000000 000000be 00000000 00000000 ................ |
| 000100d0: 00000000 00000000 00000000 00000000 ................ |
| 000100e0: 00000000 00000000 00000000 00000000 ................ |
| 000100f0: 00000000 00000000 00000000 00000000 ................ |
| => md.b 10000 |
| 00010000: 00 00 01 00 00 00 00 00 00 0f f3 f0 96 55 00 00 .............U.. |
| 00010010: 10 10 01 10 00 00 00 00 10 10 01 10 00 00 00 00 ................ |
| 00010020: 50 10 01 10 00 00 00 00 d8 4c 6d b9 ff 7f 00 00 P........Lm..... |
| 00010030: 00 00 00 00 00 00 00 00 18 0f f3 f0 96 55 00 00 .............U.. |
| => md.b 10000 10 |
| 00010000: 00 00 01 00 00 00 00 00 00 0f f3 f0 96 55 00 00 .............U.. |
| => |
| 00010010: 10 10 01 10 00 00 00 00 10 10 01 10 00 00 00 00 ................ |
| => |
| 00010020: 50 10 01 10 00 00 00 00 d8 4c 6d b9 ff 7f 00 00 P........Lm..... |
| => |
| => md.q 10000 |
| 00010000: 0000000000010000 00005596f0f30f00 .............U.. |
| 00010010: 0000000010011010 0000000010011010 ................ |
| 00010020: 0000000010011050 00007fffb96d4cd8 P........Lm..... |
| 00010030: 0000000000000000 00005596f0f30f18 .............U.. |
| 00010040: 0000000010011040 0000000010011040 @.......@....... |
| 00010050: 00007fffb96d4cd8 0000000010011020 .Lm..... ....... |
| 00010060: 000000c300000003 0000000000000000 ................ |
| 00010070: 0000000000000000 00005596f0e892f3 .............U.. |
| |
| The empty commands cause a 'repeat', so that md shows the next available data |
| in the same format as before. |
| |
| |
| Return value |
| ------------ |
| |
| The return value $? is always 0 (true). |