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mod: fix module object file lookup

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On systems where vmlinux file is not under /usr/lib/debug/lib/modules
directory, 'mod -s|-S' command may fail to find the module's object
file with the below error:

    mod: cannot find or load object file for sd_mod module

Fix it by trying all possible module object file extentions while
searching for the object file under /usr/lib/debug/lib/modules
directory.

Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.ibm.com>
Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
This commit is contained in:
Hari Bathini 2021-09-03 17:33:42 +05:30 committed by Kazuhito Hagio
parent 15765867c0
commit cf0c8d10e1
1 changed files with 12 additions and 1 deletions
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13
kernel.c
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@ -4796,7 +4796,18 @@ module_objfile_search(char *modref, char *filename, char *tree)
sprintf(dir, "%s/%s", DEFAULT_REDHAT_DEBUG_LOCATION,
kt->utsname.release);
retbuf = search_directory_tree(dir, file, 0);
if (!(retbuf = search_directory_tree(dir, file, 0))) {
switch (kt->flags & (KMOD_V1|KMOD_V2))
{
case KMOD_V2:
sprintf(file, "%s.ko", modref);
retbuf = search_directory_tree(dir, file, 0);
if (!retbuf) {
sprintf(file, "%s.ko.debug", modref);
retbuf = search_directory_tree(dir, file, 0);
}
}
}
if (!retbuf && (env = getenv("CRASH_MODULE_PATH"))) {
sprintf(dir, "%s", env);