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![]() When ld detects unaligned relocations, it emits R_PPC64_UADDR64 relocations instead of R_PPC64_RELATIVE. Currently R_PPC64_UADDR64 are detected by arch/powerpc/tools/relocs_check.sh and expected not to work. Below is a simple chunk to trigger this behaviour (this disables optimization for the demonstration purposes only, this also happens with -O1/-O2 when CONFIG_PRINTK_INDEX=y, for example): \#pragma GCC push_options \#pragma GCC optimize ("O0") struct entry { const char *file; int line; } __attribute__((packed)); static const struct entry e1 = { .file = __FILE__, .line = __LINE__ }; static const struct entry e2 = { .file = __FILE__, .line = __LINE__ }; ... prom_printf("e1=%s %lx %lx\n", e1.file, (unsigned long) e1.file, mfmsr()); prom_printf("e2=%s %lx\n", e2.file, (unsigned long) e2.file); \#pragma GCC pop_options This adds support for UADDR64 for 64bit. This reuses __dynamic_symtab from the 32bit code which supports more relocation types already. Because RELACOUNT includes only R_PPC64_RELATIVE, this replaces it with RELASZ which is the size of all relocation records. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220309061822.168173-1-aik@ozlabs.ru |
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checkpatch.sh | ||
gcc-check-mprofile-kernel.sh | ||
head_check.sh | ||
relocs_check.sh | ||
unrel_branch_check.sh |