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>
Building for a bf533-stamp ends up with this error:
smc91111_eeprom.o: In function `smc91111_eeprom':
examples/standalone/smc91111_eeprom.c:58: undefined reference to `memset'
make[2]: *** [smc91111_eeprom] Error 1
The new eth_struct definition means gcc has to zero out the structure on
the stack, and some gcc versions optimize this with an implicit call to
memset. So tweak the structure style to avoid that gcc feature.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
Commit 6a45e38495 (Make getenv_IPaddr() global)
inadvertently added ' #include "net.h" ' to the standalone programs, creating
duplicate definitions of 'struct eth_device'. This patch removes the local
definitions and removes other code that breaks due to the change in definition.
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Since the Makefile now controls the compilation of this, there is no need
for CONFIG checking nor the stub function.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
All in-tree boards that use this controller have CONFIG_NET_MULTI
added
Also:
- changed CONFIG_DRIVER_SMC91111 to CONFIG_SMC91111
- cleaned up line lengths
- modified all boards that override weak function in this driver
- modified all eeprom standalone apps to work with new driver
- updated blackfin standalone EEPROM app after testing
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The current files in examples are all standalone application examples,
so put them in their own subdirectory for organizational purposes
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
2009-07-21 00:13:21 +02:00
Renamed from examples/smc91111_eeprom.c (Browse further)
