The kernel modules gdb can use will be in .ko files scattered under the
linux/ source dir which you can find with commands like $ find . -name
.git -prune -o -name \*.ko -print Jonathan
I finally managed to compile some debug symbols into the kernel. Here we go:
dmesg:
[3179998.695837] Kernel unaligned access at TPC[1066a958]
copy_to_user_state+0x54/0x9c [xfrm_user]
[3179998.811473] Kernel unaligned access at TPC[1066a958]
copy_to_user_state+0x54/0x9c [xfrm_user]
Debug output:
Reading symbols from
/home/inst/kernel/linux-2.6-2.6.32/net/xfrm/xfrm_user.ko...done.
(gdb) list *(copy_to_user_state+0x54)
0x9c0 is in copy_to_user_state (net/xfrm/xfrm_user.c:513).
508 {
509 memcpy(&p->id, &x->id, sizeof(p->id));
510 memcpy(&p->sel, &x->sel, sizeof(p->sel));
511 memcpy(&p->lft, &x->lft, sizeof(p->lft));
512 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
513 memcpy(&p->stats, &x->stats, sizeof(p->stats));
514 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
515 p->mode = x->props.mode;
516 p->replay_window = x->props.replay_window;
517 p->reqid = x->props.reqid;
(gdb) list *(copy_to_user_state+0x9c0)
0x132c is in xfrm_add_sa_expire (include/net/xfrm.h:761).
756 atomic_dec(&x->refcnt);
757 }
758
759 static inline void xfrm_state_put(struct xfrm_state *x)
760 {
761 if (atomic_dec_and_test(&x->refcnt))
762 __xfrm_state_destroy(x);
763 }
764
765 static inline void xfrm_state_hold(struct xfrm_state *x)
I'll provide same info for a 3.x kernel, soon.
Regards,
Sebastian
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