[PATCH 09/11] RISC-V: Support SUB32 relocation type in kernel module

From: Zong Li
Date: Tue Mar 13 2018 - 04:48:58 EST


Signed-off-by: Zong Li <zong@xxxxxxxxxxxxx>
---
arch/riscv/kernel/module.c | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/arch/riscv/kernel/module.c b/arch/riscv/kernel/module.c
index 2d14dff22861..4228270efe93 100644
--- a/arch/riscv/kernel/module.c
+++ b/arch/riscv/kernel/module.c
@@ -253,6 +253,13 @@ static int apply_r_riscv_add32_rela(struct module *me, u32 *location,
return 0;
}

+static int apply_r_riscv_sub32_rela(struct module *me, u32 *location,
+ Elf_Addr v)
+{
+ *(u32 *)location -= (*(u32 *)v);
+ return 0;
+}
+
static int (*reloc_handlers_rela[]) (struct module *me, u32 *location,
Elf_Addr v) = {
[R_RISCV_64] = apply_r_riscv_64_rela,
@@ -272,6 +279,7 @@ 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_SUB32] = apply_r_riscv_sub32_rela,
};

int apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab,
--
2.16.1