I came across the same issue today (2/2/2017), i.e. "unsupported RELA
relocation: 275", while using "Ubuntu 16.04.1 LTS (GNU/Linux
4.4.0-59-generic aarch64)". I read above messages and have verified
that arch/arm64/Makefile does have -mpc-relative-literal-loads as shown
below. The kernel config file also has CONFIG_ARM64_ERRATUM_843419=y.
However, module.c shows "#ifndef CONFIG_ARM64_ERRATUM_843419".
Shouldn't this be #ifdef instead? Could it be that I'm seeing the error
message since #ifndef compiled out "case R_AARCH64_ADR_PREL_PG_HI21"
(275)?
ifeq ($(CONFIG_ARM64_ERRATUM_843419), y)
KBUILD_CFLAGS_MODULE += -mcmodel=large
KBUILD_CFLAGS_MODULE += $(call cc-option, -mpc-relative-literal-loads)
endif
File: arch/arm64/kernel/module.c
Linux Kernel Version: 4.9
195int apply_relocate_add(Elf64_Shdr *sechdrs,
196 const char *strtab,
197 unsigned int symindex,
198 unsigned int relsec,
199 struct module *me)
200{
...
334#ifndef CONFIG_ARM64_ERRATUM_843419
335 case R_AARCH64_ADR_PREL_PG_HI21_NC:
336 overflow_check = false;
337 case R_AARCH64_ADR_PREL_PG_HI21:
338 ovf = reloc_insn_imm(RELOC_OP_PAGE, loc, val, 12,
21,
339 AARCH64_INSN_IMM_ADR);
340 break;
341#endif
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https://bugs.launchpad.net/bugs/1533009
Title:
arm64: "unsupported RELA relocation"
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