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modpost: always show verbose warning for section mismatch

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Unless CONFIG_DEBUG_SECTION_MISMATCH is enabled, modpost only shows
the number of section mismatches.

If you want to know the symbols causing the issue, you need to rebuild
with CONFIG_DEBUG_SECTION_MISMATCH. It is tedious.

I think it is fine to show annoying warning when a new section mismatch
comes in.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit is contained in:
Masahiro Yamada 2019-02-01 13:50:45 +09:00
parent 393492b567
commit 46c7dd56d5
2 changed files with 5 additions and 23 deletions
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1
scripts/Makefile.modpost
View File

@ -77,7 +77,6 @@ modpost = scripts/mod/modpost \
$(if $(KBUILD_EXTMOD),-I $(modulesymfile)) \
$(if $(KBUILD_EXTRA_SYMBOLS), $(patsubst %, -e %,$(KBUILD_EXTRA_SYMBOLS))) \
$(if $(KBUILD_EXTMOD),-o $(modulesymfile)) \
$(if $(CONFIG_DEBUG_SECTION_MISMATCH),,-S) \
$(if $(CONFIG_SECTION_MISMATCH_WARN_ONLY),,-E) \
$(if $(KBUILD_EXTMOD)$(KBUILD_MODPOST_WARN),-w)

27
scripts/mod/modpost.c
View File

@ -35,7 +35,6 @@ static int vmlinux_section_warnings = 1;
static int warn_unresolved = 0;
/* How a symbol is exported */
static int sec_mismatch_count = 0;
static int sec_mismatch_verbose = 1;
static int sec_mismatch_fatal = 0;
/* ignore missing files */
static int ignore_missing_files;
@ -1406,8 +1405,6 @@ static void report_sec_mismatch(const char *modname,
char *prl_to;
sec_mismatch_count++;
if (!sec_mismatch_verbose)
return;
get_pretty_name(from_is_func, &from, &from_p);
get_pretty_name(to_is_func, &to, &to_p);
@ -1655,9 +1652,7 @@ static void extable_mismatch_handler(const char* modname, struct elf_info *elf,
sec_mismatch_count++;
if (sec_mismatch_verbose)
report_extable_warnings(modname, elf, mismatch, r, sym,
fromsec, tosec);
report_extable_warnings(modname, elf, mismatch, r, sym, fromsec, tosec);
if (match(tosec, mismatch->bad_tosec))
fatal("The relocation at %s+0x%lx references\n"
@ -2433,7 +2428,7 @@ int main(int argc, char **argv)
struct ext_sym_list *extsym_iter;
struct ext_sym_list *extsym_start = NULL;
while ((opt = getopt(argc, argv, "i:I:e:mnsST:o:awE")) != -1) {
while ((opt = getopt(argc, argv, "i:I:e:mnsT:o:awE")) != -1) {
switch (opt) {
case 'i':
kernel_read = optarg;
@ -2465,9 +2460,6 @@ int main(int argc, char **argv)
case 's':
vmlinux_section_warnings = 0;
break;
case 'S':
sec_mismatch_verbose = 0;
break;
case 'T':
files_source = optarg;
break;
@ -2525,18 +2517,9 @@ int main(int argc, char **argv)
}
if (dump_write)
write_dump(dump_write);
if (sec_mismatch_count) {
if (!sec_mismatch_verbose) {
warn("modpost: Found %d section mismatch(es).\n"
"To see full details build your kernel with:\n"
"'make CONFIG_DEBUG_SECTION_MISMATCH=y'\n",
sec_mismatch_count);
}
if (sec_mismatch_fatal) {
fatal("modpost: Section mismatches detected.\n"
"Set CONFIG_SECTION_MISMATCH_WARN_ONLY=y to allow them.\n");
}
}
if (sec_mismatch_count && sec_mismatch_fatal)
fatal("modpost: Section mismatches detected.\n"
"Set CONFIG_SECTION_MISMATCH_WARN_ONLY=y to allow them.\n");
free(buf.p);
return err;