|From:||"Simon 'corecode' Schubert" <corecode@xxxxxxxxxxxx>|
|Date:||Thu, 22 Mar 2007 12:21:03 +0100|
:So I take my first foray into the dragonfly kernel and do this to
:ffs_mount() in /usr/src/sys/vfs/ufs/ffs_vfsops.c: I merely add a
: kprintf("ffs_mount to %s\n",((path == NULL) ? "(NULL)" : path));
:as the very first line of code (past the declarations of course).
:When I test this by starting up my vkernel, if path is non-null, it
:points to garbage data. :
:I'm probably being naive here, what am I missing?
path is passed from userland. Its a userland pointer. It shouldn't
be garbage, but you probably need to do a copyin() into a kernel
buffer instead of printing it directly. Actually, I'm a little at a loss because on the PC architecture the pointer should still be
printable (if a bit dangerous due to being a userland address).
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