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| author | Yauheni Kaliuta <yauheni.kaliuta@redhat.com> | 2018-11-13 11:00:29 +0200 |
|---|---|---|
| committer | Lucas De Marchi <lucas.demarchi@intel.com> | 2018-11-13 09:50:49 -0800 |
| commit | 3ada8df85c0d493bd8ff13d11eff33f9e4c37676 (patch) | |
| tree | 21fa822164ad9d6918a2fb83fa7bd6166fc67921 | |
| parent | 8353284d83b4c0fd0389601fbfba5cd2863a661d (diff) | |
| download | kmod-3ada8df85c0d493bd8ff13d11eff33f9e4c37676.tar.gz kmod-3ada8df85c0d493bd8ff13d11eff33f9e4c37676.zip | |
modprobe: add --show-exports
modprobe has --show-modversions switch, which dumps symbols with
their modversion crcs from the __versions sections.
At the moment the section contains information for the dependency
symbols only, while exported symbols add to symtab entries with
__crc_ prefix (the format may differ, see 1e48901166ef libkmod-elf:
resolve CRC if module is built with MODULE_REL_CRCS).
The patch makes it to show exported symbols as well.
The function is basically cut'n'paste of show_modversions(),
but 'version' family replaced with 'symbol' one.
Signed-off-by: Yauheni Kaliuta <yauheni.kaliuta@redhat.com>
| -rw-r--r-- | tools/modprobe.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/tools/modprobe.c b/tools/modprobe.c index 43605cc..a9e2331 100644 --- a/tools/modprobe.c +++ b/tools/modprobe.c @@ -76,6 +76,7 @@ static const struct option cmdopts[] = { {"show-config", no_argument, 0, 'c'}, {"show-modversions", no_argument, 0, 4}, {"dump-modversions", no_argument, 0, 4}, + {"show-exports", no_argument, 0, 6}, {"dry-run", no_argument, 0, 'n'}, {"show", no_argument, 0, 'n'}, @@ -124,6 +125,7 @@ static void help(void) "\t-c, --show-config Same as --showconfig\n" "\t --show-modversions Dump module symbol version and exit\n" "\t --dump-modversions Same as --show-modversions\n" + "\t --show-exports Only print module exported symbol versions and exit\n" "\n" "General Options:\n" "\t-n, --dry-run Do not execute operations, just print out\n" @@ -232,6 +234,34 @@ static int show_modversions(struct kmod_ctx *ctx, const char *filename) return 0; } +static int show_exports(struct kmod_ctx *ctx, const char *filename) +{ + struct kmod_list *l, *list = NULL; + struct kmod_module *mod; + int err = kmod_module_new_from_path(ctx, filename, &mod); + if (err < 0) { + LOG("Module %s not found.\n", filename); + return err; + } + + err = kmod_module_get_symbols(mod, &list); + if (err < 0) { + LOG("could not get symbols of %s: %s\n", + filename, strerror(-err)); + kmod_module_unref(mod); + return err; + } + + kmod_list_foreach(l, list) { + const char *symbol = kmod_module_symbol_get_symbol(l); + uint64_t crc = kmod_module_symbol_get_crc(l); + printf("0x%08"PRIx64"\t%s\n", crc, symbol); + } + kmod_module_symbols_free_list(list); + kmod_module_unref(mod); + return 0; +} + static int command_do(struct kmod_module *module, const char *type, const char *command, const char *cmdline_opts) { @@ -727,6 +757,7 @@ static int do_modprobe(int argc, char **orig_argv) int do_remove = 0; int do_show_config = 0; int do_show_modversions = 0; + int do_show_exports = 0; int err; argv = prepend_options_from_env(&argc, orig_argv); @@ -783,6 +814,9 @@ static int do_modprobe(int argc, char **orig_argv) case 4: do_show_modversions = 1; break; + case 6: + do_show_exports = 1; + break; case 'n': dry_run = 1; break; @@ -886,6 +920,8 @@ static int do_modprobe(int argc, char **orig_argv) err = show_config(ctx); else if (do_show_modversions) err = show_modversions(ctx, args[0]); + else if (do_show_exports) + err = show_exports(ctx, args[0]); else if (do_remove) err = rmmod_all(ctx, args, nargs); else if (use_all) |