Hey Charlie, On Tue, Oct 17, 2023 at 10:34:15PM -0700, Charlie Jenkins wrote: > A handful of module relocations were missing, this patch includes the > remaining ones. I also wrote some test cases to ensure that module > loading works properly. Some relocations cannot be supported in the > kernel, these include the ones that rely on thread local storage and > dynamic linking. > > ULEB128 handling is a bit special because SET and SUB relocations must > happen together, and SET must happen before SUB. A psABI proposal [1] > mandates that the first SET_ULEB128 that appears before a SUB_ULEB128 > is the associated SET_ULEB128. > > This can be tested by enabling KUNIT, RUNTIME_KERNEL_TESTING_MENU, and > RISCV_MODULE_LINKING_KUNIT. > > [1] https://github.com/riscv-non-isa/riscv-elf-psabi-doc/pull/403 > > Signed-off-by: Charlie Jenkins <charlie@xxxxxxxxxxxx> > --- > Changes in v4: > - Complete removal of R_RISCV_RVC_LUI > - Fix bug in R_RISCV_SUB6 linking > - Only build ULEB128 tests if supported by toolchain > - Link to v3: https://lore.kernel.org/r/20231016-module_relocations-v3-0-a667fd6071e9@xxxxxxxxxxxx On patch 2/2: ../arch/riscv/kernel/tests/module_test/test_uleb128.S:18:17: error: unknown relocation name ../arch/riscv/kernel/tests/module_test/test_uleb128.S:19:17: error: unknown relocation name Same toolchain configuration in the patchwork automation as before. Cheers, Conor. > > Changes in v3: > - Add prototypes to test_module_linking_main as recommended by intel > zero day bot > - Improve efficiency of ULEB128 pair matching > - Link to v2: https://lore.kernel.org/r/20231006-module_relocations-v2-0-47566453fedc@xxxxxxxxxxxx > > Changes in v2: > - Added ULEB128 relocations > - Link to v1: https://lore.kernel.org/r/20230913-module_relocations-v1-0-bb3d8467e793@xxxxxxxxxxxx > > --- > Charlie Jenkins (2): > riscv: Add remaining module relocations > riscv: Add tests for riscv module loading > > arch/riscv/Kconfig.debug | 1 + > arch/riscv/include/uapi/asm/elf.h | 5 +- > arch/riscv/kernel/Makefile | 1 + > arch/riscv/kernel/module.c | 207 ++++++++++++++++++--- > arch/riscv/kernel/tests/Kconfig.debug | 35 ++++ > arch/riscv/kernel/tests/Makefile | 1 + > arch/riscv/kernel/tests/module_test/Makefile | 15 ++ > .../tests/module_test/test_module_linking_main.c | 85 +++++++++ > arch/riscv/kernel/tests/module_test/test_set16.S | 23 +++ > arch/riscv/kernel/tests/module_test/test_set32.S | 20 ++ > arch/riscv/kernel/tests/module_test/test_set6.S | 23 +++ > arch/riscv/kernel/tests/module_test/test_set8.S | 23 +++ > arch/riscv/kernel/tests/module_test/test_sub16.S | 22 +++ > arch/riscv/kernel/tests/module_test/test_sub32.S | 22 +++ > arch/riscv/kernel/tests/module_test/test_sub6.S | 22 +++ > arch/riscv/kernel/tests/module_test/test_sub64.S | 27 +++ > arch/riscv/kernel/tests/module_test/test_sub8.S | 22 +++ > arch/riscv/kernel/tests/module_test/test_uleb128.S | 20 ++ > 18 files changed, 548 insertions(+), 26 deletions(-) > --- > base-commit: 4d320c2d9a2b22f53523a1b012cda17a50220965 > change-id: 20230908-module_relocations-f63ced651bd7 > -- > - Charlie >
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