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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>
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Signed-off-by: Wolfgang Denk <wd@denx.de>
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The "mtdparts add" command wrote through a NULL pointer - on many
systems this went unnoticed (PowerPC has writable RAM there, some ARM
systems have ROM where a write has no effect), but on arm1136
(i.MX31) it crashed the system.
Add appropriate checks.
Signed-off-by: Wolfgang Denk <wd@denx.de>
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Allow overwriting defined partitions in the device tree blob
using partition info defined in the 'mtdparts' environment
variable.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Cc: Gerald Van Baren <vanbaren@cideas.com>
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The length of configured MTDPARTS_DEFAULT string
could be greater than console printbuffer size.
Replace printf() by puts() to avoid potential buffer
overflows.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
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Fix warning messages:
cmd_mtdparts.c:1429: warning: format '%08lx' expects type 'long
unsigned int', but argument 6 has type 'u32'
cmd_mtdparts.c:1429: warning: format '%08lx' expects type 'long
unsigned int', but argument 7 has type 'u32'
Signed-off-by: Wolfgang Denk <wd@denx.de>
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Legacy NAND had been scheduled for removal. Any boards that use this
were already not building in the previous release due to an #error.
The disk on chip code in common/cmd_doc.c relies on legacy NAND,
and it has also been removed. There is newer disk on chip code
in drivers/mtd/nand; someone with access to hardware and sufficient
time and motivation can try to get that working, but for now disk
on chip is not supported.
Signed-off-by: Scott Wood <scottwood@freescale.com>
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Many of the help messages were not really helpful; for example, many
commands that take no arguments would not print a correct synopsis
line, but "No additional help available." which is not exactly wrong,
but not helpful either.
Commit ``Make "usage" messages more helpful.'' changed this
partially. But it also became clear that lots of "Usage" and "Help"
messages (fields "usage" and "help" in struct cmd_tbl_s respective)
were actually redundant.
This patch cleans this up - for example:
Before:
=> help dtt
dtt - Digital Thermometer and Thermostat
Usage:
dtt - Read temperature from digital thermometer and thermostat.
After:
=> help dtt
dtt - Read temperature from Digital Thermometer and Thermostat
Usage:
dtt
Signed-off-by: Wolfgang Denk <wd@denx.de>
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There is actually no good reason to enforce that all board
configuations must define default settings for "mtdids" and
"mtdparts". Actually this may be difficult to handle, especially on
boards where different sizes of flash chips can be fit, so there is no
real "default" partition map for all boards.
Lift this arbitrary limitation.
Signed-off-by: Wolfgang Denk <wd@denx.de>
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This patch removes all references to the direct CFI FLASH interface
(via flash_info[]). Now that all FLASH types currently handled in
mtdparts are available (if selected, see below) via the MTD infrastructure.
This is NOR, NAND and OneNAND right now. This can be achieved by defining
the following options:
CONFIG_MTD_DEVICE (for all FLASH types)
plus
CONFIG_FLASH_CFI_MTD (for NOR FLASH)
So we need to add those defines to the board config headers currently
using the mtdparts commands. This is done via another patch, so
we shouldn't break mtdparts compatibility.
One big advantage from this solution is that the cmd_mtdparts.c is
*much* cleaner now. Lot's of #ifdef's are removed and the code itself
is smaller. Additionally the newly added MDT concatenation feature
can new be used via the mtdparts infrastructure and therefor via
UBI etc.
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Ladislav Michl <ladis@linux-mips.org>
Cc: Scott Wood <scottwood@freescale.com>
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Currently using JFFS2 with MTDPARTS enabled doesn't work. This is because
mtdparts_init() is available in both files, cmd_mtdparts.c and
cmd_jffs2.c. Please note that in the original cmd_jffs2.c file (before
the jffs2/mtdparts command/file split those 2 different versions
already existed. So this is nothing new. The main problem is that the
variables "current_dev" and "current_partnum" are declared in both
files now. This doesn't work.
This patch now changes the names of those variable to more specific
names: "current_mtd_dev" and "current_mtd_partnum". This is because
this patch also changes the declaration from static to global, so
that they can be used from both files.
Please note that my first tests were not successful. The MTD devices
selected via mtdparts are now accessed but I'm failing to see the
directory listed via the "ls" command. Nothing is displayed. Perhaps
I didn't generate the JFFS2 image correctly (I never used JFFS2 in
U-Boot before). Not sure. Perhaps somebody else could take a look at
this as well. I'll continue looking into this on Monday.
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Detlev Zundel <dzu@denx.de>
Cc: Ilya Yanok <yanok@emcraft.com>
Cc: Renaud barbier <renaud.barbier@ge.com>
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Make the headers in the "mtdparts" command output line up
with their columns ... strike the extra TAB character.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
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On Thu, Mar 19, 2009 at 01:30:36PM +0100, Stefan Roese wrote:
> Currently the mtdparts commands are included in the jffs2 command support.
> This doesn't make sense anymore since other commands (e.g. UBI) use this
> infrastructure as well now. This patch separates the mtdparts commands from
> the jffs2 commands making it possible to only select mtdparts when no JFFS2
> support is needed.
... and to make it useful for NAND chips as well, we should also remove now
unrelated CONFIG_JFFS2_NAND. Note that struct part_info etc is in
jffs2/load_kernel.h which is a bit misleading filename for that purpose,
but that can be fixed later (tm).
Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
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Currently the mtdparts commands are included in the jffs2 command support.
This doesn't make sense anymore since other commands (e.g. UBI) use this
infrastructure as well now. This patch separates the mtdparts commands from
the jffs2 commands making it possible to only select mtdparts when no JFFS2
support is needed.
Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
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