kbuild: fix modpost segfault for 64bit mipsel kernel (c8d8b837) · Commits · 戴 / test

scripts/mod/modpost.c

+9 −2

Original line number	Diff line number	Diff line
		@@ -709,10 +709,17 @@ static void check_sec_ref(struct module mod, const char modname,
		for (rela = start; rela < stop; rela++) {
		Elf_Rela r;
		const char *secname;
		unsigned int r_sym;
		r.r_offset = TO_NATIVE(rela->r_offset);
		r.r_info = TO_NATIVE(rela->r_info);
		if (hdr->e_ident[EI_CLASS] == ELFCLASS64 &&
		hdr->e_machine == EM_MIPS) {
		r_sym = ELF64_MIPS_R_SYM(rela->r_info);
		r_sym = TO_NATIVE(r_sym);
		} else {
		r_sym = ELF_R_SYM(TO_NATIVE(rela->r_info));
		}
		r.r_addend = TO_NATIVE(rela->r_addend);
		sym = elf->symtab_start + ELF_R_SYM(r.r_info);
		sym = elf->symtab_start + r_sym;
		/* Skip special sections */
		if (sym->st_shndx >= SHN_LORESERVE)
		continue;

+19 −0

Original line number	Diff line number	Diff line
		@@ -39,6 +39,25 @@
		#define ELF_R_TYPE ELF64_R_TYPE
		#endif

		/* The 64-bit MIPS ELF ABI uses an unusual reloc format. */
		typedef struct
		{
		Elf32_Word r_sym; /* Symbol index */
		unsigned char r_ssym; /* Special symbol for 2nd relocation */
		unsigned char r_type3; /* 3rd relocation type */
		unsigned char r_type2; /* 2nd relocation type */
		unsigned char r_type1; /* 1st relocation type */
		} _Elf64_Mips_R_Info;

		typedef union
		{
		Elf64_Xword r_info_number;
		_Elf64_Mips_R_Info r_info_fields;
		} _Elf64_Mips_R_Info_union;

		#define ELF64_MIPS_R_SYM(i) \
		((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_sym)

		#if KERNEL_ELFDATA != HOST_ELFDATA

		static inline void __endian(const void src, void dest, unsigned int size)