On Wed, 8 Jul 2020 at 23:10, Emil Renner Berthing <kernel@xxxxxxxx> wrote:
>
> These are needed for the __jump_table in modules using
> static keys/jump-labels with the layout from
> HAVE_ARCH_JUMP_LABEL_RELATIVE on 64bit kernels.
>
> Signed-off-by: Emil Renner Berthing <kernel@xxxxxxxx>
Reviewed-by: Björn Töpel <bjorn.topel@xxxxxxxxx>
Tested-by: Björn Töpel <bjorn.topel@xxxxxxxxx>
> ---
>
> Tested on the HiFive Unleashed board.
>
> This patch is new in v2. It fixes an error loading modules
> containing static keys found by Björn Töpel.
>
> arch/riscv/kernel/module.c | 16 ++++++++++++++++
> 1 file changed, 16 insertions(+)
>
> diff --git a/arch/riscv/kernel/module.c b/arch/riscv/kernel/module.c
> index 7191342c54da..104fba889cf7 100644
> --- a/arch/riscv/kernel/module.c
> +++ b/arch/riscv/kernel/module.c
> @@ -263,6 +263,13 @@ static int apply_r_riscv_add32_rela(struct module *me, u32 *location,
> return 0;
> }
>
> +static int apply_r_riscv_add64_rela(struct module *me, u32 *location,
> + Elf_Addr v)
> +{
> + *(u64 *)location += (u64)v;
> + return 0;
> +}
> +
> static int apply_r_riscv_sub32_rela(struct module *me, u32 *location,
> Elf_Addr v)
> {
> @@ -270,6 +277,13 @@ static int apply_r_riscv_sub32_rela(struct module *me, u32 *location,
> return 0;
> }
>
> +static int apply_r_riscv_sub64_rela(struct module *me, u32 *location,
> + Elf_Addr v)
> +{
> + *(u64 *)location -= (u64)v;
> + return 0;
> +}
> +
> static int (*reloc_handlers_rela[]) (struct module *me, u32 *location,
> Elf_Addr v) = {
> [R_RISCV_32] = apply_r_riscv_32_rela,
> @@ -290,7 +304,9 @@ static int (*reloc_handlers_rela[]) (struct module *me, u32 *location,
> [R_RISCV_RELAX] = apply_r_riscv_relax_rela,
> [R_RISCV_ALIGN] = apply_r_riscv_align_rela,
> [R_RISCV_ADD32] = apply_r_riscv_add32_rela,
> + [R_RISCV_ADD64] = apply_r_riscv_add64_rela,
> [R_RISCV_SUB32] = apply_r_riscv_sub32_rela,
> + [R_RISCV_SUB64] = apply_r_riscv_sub64_rela,
> };
>
> int apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab,
> --
> 2.27.0
>
