Hi Matt,
On Tue, Oct 15, 2024 at 4:19 PM Matthew Maurer <mmaurer@xxxxxxxxxx> wrote:
>
> diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
> index 107393a8c48a..d18ff8a1109a 100644
> --- a/scripts/mod/modpost.c
> +++ b/scripts/mod/modpost.c
> @@ -1840,15 +1840,56 @@ static void add_versions(struct buffer *b, struct module *mod)
> continue;
> }
> if (strlen(s->name) >= MODULE_NAME_LEN) {
> +#ifdef CONFIG_EXTENDED_MODVERSIONS
> + /* this symbol will only be in the extended info */
> + continue;
> +#else
> error("too long symbol \"%s\" [%s.ko]\n",
> s->name, mod->name);
> break;
> +#endif
I applied these patches to my test tree[1] and have the following
options enabled in my .config:
$ grep -E 'MODVERSIONS|GEN.*KSYMS' .config
CONFIG_HAVE_ASM_MODVERSIONS=y
CONFIG_MODVERSIONS=y
# CONFIG_GENKSYMS is not set
CONFIG_GENDWARFKSYMS=y
CONFIG_ASM_MODVERSIONS=y
CONFIG_EXTENDED_MODVERSIONS=y
When I try to build a Rust module, I still get the following error:
ERROR: modpost: too long symbol
"_RNvXs2_NtNtNtCsivAAjSnxUpM_4core3fmt3num3implNtB9_7Display3fmt"
[samples/rust/rust_print.ko]
I suspect gating this behind a config would require you to add a new
command line flag to modpost and check for CONFIG_EXTENDED_MODVERSIONS
in scripts/Makefile.modpost instead.
[1] https://github.com/samitolvanen/linux/commits/rustmodversions
Sami
