Messages in this thread | | | From | Zong Li <> | Date | Wed, 21 Mar 2018 10:53:22 +0800 | Subject | Re: [PATCH v2 00/11] RISC-V: Resolve the issue of loadable module on 64-bit |
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2018-03-21 1:11 GMT+08:00 Palmer Dabbelt <palmer@sifive.com>: > On Thu, 15 Mar 2018 01:50:40 PDT (-0700), zong@andestech.com wrote: >> >> These patches resolve the some issues of loadable module. >> - symbol out of ranges >> - unknown relocation types >> >> The reference of external variable and function symbols >> cannot exceed 32-bit offset ranges in kernel module. >> The module only can work on the 32-bit OS or the 64-bit >> OS with sv32 virtual addressing. >> >> These patches will generate the .got, .got.plt and >> .plt sections during loading module, let it can refer >> to the symbol which locate more than 32-bit offset. >> These sections depend on the relocation types: >> - R_RISCV_GOT_HI20 >> - R_RISCV_CALL_PLT >> >> These patches also support more relocation types >> - R_RISCV_CALL >> - R_RISCV_HI20 >> - R_RISCV_LO12_I >> - R_RISCV_LO12_S >> - R_RISCV_RVC_BRANCH >> - R_RISCV_RVC_JUMP >> - R_RISCV_ALIGN >> - R_RISCV_ADD32 >> - R_RISCV_SUB32 >> >> This is the list of testing modules: >> # lsmod >> btrfs 7876158 0 - Live 0xffffffd00745d000 >> ramoops 90806 0 - Live 0xffffffd0024b8000 >> lzo 10554 0 - Live 0xffffffd002050000 >> zstd_decompress 567575 1 btrfs, Live 0xffffffd00238b000 >> zstd_compress 1543837 1 btrfs, Live 0xffffffd002211000 >> zram 101300 0 - Live 0xffffffd0021b8000 >> xxhash 62254 2 zstd_decompress,zstd_compress, Live 0xffffffd0020cf000 >> xor 33246 1 btrfs, Live 0xffffffd002042000 >> xfs 4395343 0 - Live 0xffffffd00399e000 >> tun 252041 0 - Live 0xffffffd0038e0000 >> test_user_copy 5265 0 - Live 0xffffffd003783000 >> test_static_keys 19606 0 - Live 0xffffffd003717000 >> test_static_key_base 7374 1 test_static_keys, Live 0xffffffd0036dc000 >> test_printf 7804 0 [permanent], Live 0xffffffd00369c000 >> test_module 1557 0 - Live 0xffffffd003646000 >> test_kmod 49100 0 - Live 0xffffffd0035f2000 >> test_bpf 1599301 0 - Live 0xffffffd003000000 >> test_bitmap 4403 0 - Live 0xffffffd002dd8000 >> reed_solomon 38866 1 ramoops, Live 0xffffffd002d86000 >> raid6_pq 161872 1 btrfs, Live 0xffffffd002b9e000 >> netdevsim 65401 0 - Live 0xffffffd002910000 >> >> Signed-off-by: Zong Li <zong@andestech.com> >> --- >> Change in v2: >> - Add compile option 'mno-relax' for build kernel module >> - Just fail on ALIGN type, this is unexpected type with mno-relax. >> >> Zong Li (11): >> RISC-V: Add sections of PLT and GOT for kernel module >> RISC-V: Add section of GOT.PLT for kernel module >> RISC-V: Support GOT_HI20/CALL_PLT relocation type in kernel module >> RISC-V: Support CALL relocation type in kernel module >> RISC-V: Support HI20/LO12_I/LO12_S relocation type in kernel module >> RISC-V: Support RVC_BRANCH/JUMP relocation type in kernel modulewq >> RISC-V: Support ALIGN relocation type in kernel module >> RISC-V: Support ADD32 relocation type in kernel module >> RISC-V: Support SUB32 relocation type in kernel module >> RISC-V: Enable module support in defconfig >> RISC-V: Add definition of relocation types >> >> arch/riscv/Kconfig | 5 + >> arch/riscv/Makefile | 5 + >> arch/riscv/configs/defconfig | 2 + >> arch/riscv/include/asm/module.h | 113 +++++++++++++++++++++++ >> arch/riscv/include/uapi/asm/elf.h | 7 ++ >> arch/riscv/kernel/Makefile | 1 + >> arch/riscv/kernel/module-sections.c | 156 +++++++++++++++++++++++++++++++ >> arch/riscv/kernel/module.c | 179 >> ++++++++++++++++++++++++++++++++++-- >> arch/riscv/kernel/module.lds | 8 ++ >> 9 files changed, 470 insertions(+), 6 deletions(-) >> create mode 100644 arch/riscv/include/asm/module.h >> create mode 100644 arch/riscv/kernel/module-sections.c >> create mode 100644 arch/riscv/kernel/module.lds > > > Thanks! I've added this to our for-next branch, so it should start to get a > bit more testing soon. I've had a bit of the flu and am therefor a bit out > of > it, so I'll try to look closer before the next merge window.
Thanks. Keep warm and take care yourself.
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