At 31 May 2004 20:24:26 -0700,
Fernando Pablo Lopez-Lezcano wrote:
>
> I'm trying to build Takashi's version of latencytest (0.5.3) and
> apparently something has changed in the kernel (or I have something that
> I need to turn on in the config options?). This is what I get:
known problem... i'll fix this later.
as a workaround, you can change get_symbol() to always return -EINVAL
and bail out the stuffs regarding kallsyms_lookup(). this will
disable the lookup of showtrace, but you can do the similar jobs by
comparing the addresses with the entries in /proc/kallsyms.
Takashi
>
> # make -f Makefile.module
> make -C /lib/modules/`uname -r`/build SUBDIRS=`pwd` modules
> make[1]: Entering directory
> `/lib/modules/2.6.6-1.391.2.ll.rhfc2.ccrma/build'
> CC [M] /home/nando/software/latencytest/kernel/latencytest.o
> LD [M] /home/nando/software/latencytest/kernel/latency-test.o
> Building modules, stage 2.
> MODPOST
> *** Warning: "kallsyms_lookup"
> [/home/nando/software/latencytest/kernel/latency-test.ko] undefined!
> CC /home/nando/software/latencytest/kernel/latency-test.mod.o
> LD [M] /home/nando/software/latencytest/kernel/latency-test.ko
> make[1]: Leaving directory
> `/lib/modules/2.6.6-1.391.2.ll.rhfc2.ccrma/build'
>
> If I look for that symbol or something similar this is what I get:
>
> # grep _lookup /boot/System.map-2.6.6-1.391.2.ll.rhfc2.ccrma|grep ksym
> 022b6ee0 r __ksymtab_d_lookup
> 022b9388 r __ksymtab_flow_cache_lookup
> 022b6d00 r __ksymtab_lookup_create
> 022b6d08 r __ksymtab_lookup_hash
> 022b7050 r __ksymtab_lookup_mnt
> 022b6d10 r __ksymtab_lookup_one_len
> 022b95b0 r __ksymtab_neigh_lookup
> 022b6d48 r __ksymtab_path_lookup
> 022b9600 r __ksymtab_pneigh_lookup
> 022b7648 r __ksymtab_radix_tree_gang_lookup
> 022b7650 r __ksymtab_radix_tree_gang_lookup_tag
> 022b7630 r __ksymtab_radix_tree_lookup
> 022b7140 r __ksymtab_simple_lookup
> 022b90e0 r __ksymtab_sockfd_lookup
> 022b98a0 r __ksymtab_tcf_police_lookup
> 022b9b78 r __ksymtab_tcp_v4_lookup_listener
> 022b9f70 r __ksymtab_xfrm_dst_lookup
> 022b9df8 r __ksymtab_xfrm_lookup
> 022b9e50 r __ksymtab_xfrm_state_lookup
>
> -- Fernando
>
>
>
>
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