linux/arch/riscv
Palmer Dabbelt b51fc88cb3
Merge patch series "riscv: Add remaining module relocations and tests"
Charlie Jenkins <charlie@rivosinc.com> says:

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.

This patch also overhauls the implementation of ADD/SUB/SET/ULEB128
relocations to handle overflow. "Overflow" is different for ULEB128
since it is a variable-length encoding that the compiler can be expected
to generate enough space for. Instead of overflowing, ULEB128 will
expand into the next 8-bit segment of the location.

A psABI proposal [1] was merged that mandates that SET_ULEB128 and
SUB_ULEB128 are paired, however the discussion following the merging of
the pull request revealed that while the pull request was valid, it
would be better for linkers to properly handle this overflow. This patch
proactively implements this methodology for future compatibility.

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

* b4-shazam-merge:
  riscv: Add tests for riscv module loading
  riscv: Add remaining module relocations
  riscv: Avoid unaligned access when relocating modules

Link: https://lore.kernel.org/r/20231101-module_relocations-v9-0-8dfa3483c400@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2023-11-07 14:59:35 -08:00
..
boot riscv: boot: Fix creation of loader.bin 2023-11-06 09:39:26 -08:00
configs riscv: defconfig : add CONFIG_MMC_DW for starfive 2023-11-05 09:04:54 -08:00
errata Merge patch series "Add non-coherent DMA support for AX45MP" 2023-09-08 11:24:34 -07:00
include Merge patch series "riscv: Add remaining module relocations and tests" 2023-11-07 14:59:35 -08:00
kernel Merge patch series "riscv: Add remaining module relocations and tests" 2023-11-07 14:59:35 -08:00
kvm KVM/riscv changes for 6.6 2023-08-31 13:25:55 -04:00
lib riscv: Use SYM_*() assembly macros instead of deprecated ones 2023-11-06 09:42:47 -08:00
mm riscv: split cache ops out of dma-noncoherent.c 2023-11-07 09:37:42 -08:00
net bpf, riscv: use prog pack allocator in the BPF JIT 2023-09-06 06:26:07 -07:00
purgatory riscv: Use SYM_*() assembly macros instead of deprecated ones 2023-11-06 09:42:47 -08:00
tools riscv: Check relocations at compile time 2023-04-19 07:46:32 -07:00
Kbuild kexec: rename ARCH_HAS_KEXEC_PURGATORY 2023-08-18 10:18:54 -07:00
Kconfig riscv: select ARCH_PROC_KCORE_TEXT 2023-11-06 16:25:45 -08:00
Kconfig.debug riscv: Add tests for riscv module loading 2023-11-07 14:59:32 -08:00
Kconfig.errata riscv: Kconfig.errata: Add dependency for RISCV_SBI in ERRATA_ANDES config 2023-09-08 11:25:28 -07:00
Kconfig.socs RISC-V: make ARCH_THEAD preclude XIP_KERNEL 2023-07-05 22:21:23 +02:00
Makefile riscv: Implement Shadow Call Stack 2023-10-27 14:43:08 -07:00
Makefile.postlink riscv: Use --emit-relocs in order to move .rela.dyn in init 2023-04-19 07:46:33 -07:00