display() function returns the length of the value we are displaying + 1.
As a consequence, if we have field=value\0field=value\0field=value in the
binary, then the second occurence will be skipped as ptr will miss the first
character of the following field.
Example trying to list aliases from ixgbe.ko on a 3.2 kernel.
- In the module we have:
alias=pci:v00008086d00001560sv*sd*bc*sc*i*\0
alias=pci:v00008086d0000154Asv*sd*bc*sc*i*\0
alias=pci:v00008086d00001557sv*sd*bc*sc*i*\0
alias=pci:v00008086d0000154Fsv*sd*bc*sc*i*\0
alias=pci:v00008086d0000154Dsv*sd*bc*sc*i*\0
...
- Using modinfo -F alias ixgbe returns:
alias: pci:v00008086d00001560sv*sd*bc*sc*i*
alias: pci:v00008086d00001557sv*sd*bc*sc*i*
alias: pci:v00008086d0000154Dsv*sd*bc*sc*i*
...
This problem appeared with kernel commit "modules: no need to align .modinfo
strings" b6472776816af1ed52848c93d26e3edb3b17adab in 2.6.37.
Fix this by not trusting display() return value but increment ptr by strlen(ptr)
(the same way as depmod.c does).
Signed-off-by: David Marchand <david.marchand@6wind.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This change retains "or later" state! No licensing _changes_ here,
only form is adjusted (article, space between "GPL" and "v2" and so on).
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
function old new delta
modinfo 272 329 +57
modinfo_main 325 344 +19
Signed-off-by: Lauri Kasanen <curaga@operamail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
