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* various cmd_* files: remove the command name from the help messageFrans Meulenbroeks2010-08-091-2/+2
| | | | | | | removed the command name from the help message as it is already printed. for cmd_mmc also rewrote the message a little bit Signed-off-by: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
* Make sure that argv[] argument pointers are not modified.Wolfgang Denk2010-07-041-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The hush shell dynamically allocates (and re-allocates) memory for the argument strings in the "char *argv[]" argument vector passed to commands. Any code that modifies these pointers will cause serious corruption of the malloc data structures and crash U-Boot, so make sure the compiler can check that no such modifications are being done by changing the code into "char * const argv[]". This modification is the result of debugging a strange crash caused after adding a new command, which used the following argument processing code which has been working perfectly fine in all Unix systems since version 6 - but not so in U-Boot: int main (int argc, char **argv) { while (--argc > 0 && **++argv == '-') { /* ====> */ while (*++*argv) { switch (**argv) { case 'd': debug++; break; ... default: usage (); } } } ... } The line marked "====>" will corrupt the malloc data structures and usually cause U-Boot to crash when the next command gets executed by the shell. With the modification, the compiler will prevent this with an error: increment of read-only location '*argv' N.B.: The code above can be trivially rewritten like this: while (--argc > 0 && **++argv == '-') { char *arg = *argv; while (*++arg) { switch (*arg) { ... Signed-off-by: Wolfgang Denk <wd@denx.de> Acked-by: Mike Frysinger <vapier@gentoo.org>
* CRAMFS: support cramfs in RAMHeiko Schocher2010-01-181-0/+216
cramfsls and cramfsload are added to the command list. A cramfs placed at 'cramfs_addr' can the be listed with 'cramfsls' and files can be loaded with 'cramfsload'. 'cramfs_addr' is an environment variable specifying the address the cramfs is located. This works for powerpc and for ARM. Use CONFIG_CMD_CRAMFS. Signed-off-by: Andreas Huber <andreas.huber@keymile.com> Signed-off-by: Heiko Schocher <hs@denx.de>
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