Hi,
Backported and successfully tested on currently stable Gentoo kernel 4.9.6-r1.
>From [1], gcc 4.9.4 was first problematic release.
[1] http://marc.info/?l=linux-ia64&m=147993347915422
Émeric
2017-03-19 17:20 GMT+01:00 Sergei Trofimovich <slyfox@xxxxxxxxxx>:
> Starting from gcc-5.4+ gcc geperates MLX
> instructions in more cases to refer local
> symbols:
> https://gcc.gnu.org/bugzilla/60465
>
> That caused ia64 module loader to choke
> on such instructions:
> fuse: invalid slot number 1 for IMM64
>
> Linux kernel used to handle only case where
> relocation pointed to slot=2 instruction in
> the bundle. That limitation was fixed in linux
> by 9c184a073bfd650cc791956d6ca79725bb682716 commit.
> See http://sources.redhat.com/bugzilla/show_bug.cgi?id=1433
>
> This change lifts the slot=2 restriction from
> linux kernel module loader.
>
> Tested on 'fuse' and 'btrfs' kernel modules.
>
> Cc: H. J. Lu <hjl.tools@xxxxxxxxx>
> Cc: Tony Luck <tony.luck@xxxxxxxxx>
> Cc: Fenghua Yu <fenghua.yu@xxxxxxxxx>
> Cc: linux-ia64@xxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> Bug: https://bugs.gentoo.org/601014
> Signed-off-by: Sergei Trofimovich <slyfox@xxxxxxxxxx>
> ---
> arch/ia64/kernel/module.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/ia64/kernel/module.c b/arch/ia64/kernel/module.c
> index 6ab0ae7d6535..d1d945c6bd05 100644
> --- a/arch/ia64/kernel/module.c
> +++ b/arch/ia64/kernel/module.c
> @@ -153,7 +153,7 @@ slot (const struct insn *insn)
> static int
> apply_imm64 (struct module *mod, struct insn *insn, uint64_t val)
> {
> - if (slot(insn) != 2) {
> + if (slot(insn) != 1 && slot(insn) != 2) {
> printk(KERN_ERR "%s: invalid slot number %d for IMM64\n",
> mod->name, slot(insn));
> return 0;
> @@ -165,7 +165,7 @@ apply_imm64 (struct module *mod, struct insn *insn, uint64_t val)
> static int
> apply_imm60 (struct module *mod, struct insn *insn, uint64_t val)
> {
> - if (slot(insn) != 2) {
> + if (slot(insn) != 1 && slot(insn) != 2) {
> printk(KERN_ERR "%s: invalid slot number %d for IMM60\n",
> mod->name, slot(insn));
> return 0;
> --
> 2.12.0
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-ia64" in
> the body of a message to majordomo@xxxxxxxxxxxxxxx
> More majordomo info at http://vger.kernel.org/majordomo-info.html
--
To unsubscribe from this list: send the line "unsubscribe linux-ia64" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
|