On Mon, 2008-02-25 at 19:47 -0600, Maynard Johnson wrote: > Hi, > I'm developing a kernel module that needs to parse the in-memory ELF > objects for a shared library (libc, to be specific). When running my > test on a 32-bit library, it works fine, but for a 64-bit library, the > very first copy_from_user() fails: > Elf64_Ehdr ehdr; > copy_from_user(&ehdr, location_of_lib, sizeof(Elf64_Ehdr); > > I talked this over a bit with Will Schmidt. He determined that > access_ok (being done as a result of copy_from_user) was failing, but we > don't know why. I have 32-bit and 64-bit testcases that start up and > then pause, waiting for input. We look at the entry for libc in > /proc/<pid>/maps, and the permissions are the same for both 32-bit and > 64-bit. > > I've run this test on both a stock SLES 10 SP1 kernel and on 2.6.24. > I'm sure this is a user error, but for the life of me, I don't know what > I'm doing wrong. > > Can anyone out there help?
I would have to look at the code. Ben. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
