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| author | Zong Li <zong@andestech.com> | 2018-03-15 11:50:46 +0300 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@sifive.com> | 2018-04-03 06:00:55 +0300 |
| commit | 56ea45ae239206d79d776a43bf32cbd8fa4e069d (patch) | |
| tree | d680a2fb5d788a1a7b57c128140ab6b48c73b548 /arch/riscv | |
| parent | e7456e696bff09ef2345081bf21e5ce741e2a3ce (diff) | |
| download | linux-56ea45ae239206d79d776a43bf32cbd8fa4e069d.tar.xz | |
RISC-V: Support RVC_BRANCH/JUMP relocation type in kernel modulewq
Signed-off-by: Zong Li <zong@andestech.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Diffstat (limited to 'arch/riscv')
| -rw-r--r-- | arch/riscv/kernel/module.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/riscv/kernel/module.c b/arch/riscv/kernel/module.c index f1bd6b1a4520..7ab6a9b72384 100644 --- a/arch/riscv/kernel/module.c +++ b/arch/riscv/kernel/module.c @@ -49,6 +49,39 @@ static int apply_r_riscv_jal_rela(struct module *me, u32 *location, return 0; } +static int apply_r_riscv_rcv_branch_rela(struct module *me, u32 *location, + Elf_Addr v) +{ + s64 offset = (void *)v - (void *)location; + u16 imm8 = (offset & 0x100) << (12 - 8); + u16 imm7_6 = (offset & 0xc0) >> (6 - 5); + u16 imm5 = (offset & 0x20) >> (5 - 2); + u16 imm4_3 = (offset & 0x18) << (12 - 5); + u16 imm2_1 = (offset & 0x6) << (12 - 10); + + *(u16 *)location = (*(u16 *)location & 0xe383) | + imm8 | imm7_6 | imm5 | imm4_3 | imm2_1; + return 0; +} + +static int apply_r_riscv_rvc_jump_rela(struct module *me, u32 *location, + Elf_Addr v) +{ + s64 offset = (void *)v - (void *)location; + u16 imm11 = (offset & 0x800) << (12 - 11); + u16 imm10 = (offset & 0x400) >> (10 - 8); + u16 imm9_8 = (offset & 0x300) << (12 - 11); + u16 imm7 = (offset & 0x80) >> (7 - 6); + u16 imm6 = (offset & 0x40) << (12 - 11); + u16 imm5 = (offset & 0x20) >> (5 - 2); + u16 imm4 = (offset & 0x10) << (12 - 5); + u16 imm3_1 = (offset & 0xe) << (12 - 10); + + *(u16 *)location = (*(u16 *)location & 0xe003) | + imm11 | imm10 | imm9_8 | imm7 | imm6 | imm5 | imm4 | imm3_1; + return 0; +} + static int apply_r_riscv_pcrel_hi20_rela(struct module *me, u32 *location, Elf_Addr v) { @@ -212,6 +245,8 @@ static int (*reloc_handlers_rela[]) (struct module *me, u32 *location, [R_RISCV_64] = apply_r_riscv_64_rela, [R_RISCV_BRANCH] = apply_r_riscv_branch_rela, [R_RISCV_JAL] = apply_r_riscv_jal_rela, + [R_RISCV_RVC_BRANCH] = apply_r_riscv_rcv_branch_rela, + [R_RISCV_RVC_JUMP] = apply_r_riscv_rvc_jump_rela, [R_RISCV_PCREL_HI20] = apply_r_riscv_pcrel_hi20_rela, [R_RISCV_PCREL_LO12_I] = apply_r_riscv_pcrel_lo12_i_rela, [R_RISCV_PCREL_LO12_S] = apply_r_riscv_pcrel_lo12_s_rela, |