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linux-headers-5.4.0-215
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mod
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modpost.h
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/* SPDX-License-Identifier: GPL-2.0 */ #include <stdio.h> #include <stdlib.h> #include <stdarg.h> #include <string.h> #include <sys/types.h> #include <sys/stat.h> #include <sys/mman.h> #include <fcntl.h> #include <unistd.h> #include <elf.h> #include "elfconfig.h" /* On BSD-alike OSes elf.h defines these according to host's word size */ #undef ELF_ST_BIND #undef ELF_ST_TYPE #undef ELF_R_SYM #undef ELF_R_TYPE #if KERNEL_ELFCLASS == ELFCLASS32 #define Elf_Ehdr Elf32_Ehdr #define Elf_Shdr Elf32_Shdr #define Elf_Sym Elf32_Sym #define Elf_Addr Elf32_Addr #define Elf_Sword Elf64_Sword #define Elf_Section Elf32_Half #define ELF_ST_BIND ELF32_ST_BIND #define ELF_ST_TYPE ELF32_ST_TYPE #define Elf_Rel Elf32_Rel #define Elf_Rela Elf32_Rela #define ELF_R_SYM ELF32_R_SYM #define ELF_R_TYPE ELF32_R_TYPE #else #define Elf_Ehdr Elf64_Ehdr #define Elf_Shdr Elf64_Shdr #define Elf_Sym Elf64_Sym #define Elf_Addr Elf64_Addr #define Elf_Sword Elf64_Sxword #define Elf_Section Elf64_Half #define ELF_ST_BIND ELF64_ST_BIND #define ELF_ST_TYPE ELF64_ST_TYPE #define Elf_Rel Elf64_Rel #define Elf_Rela Elf64_Rela #define ELF_R_SYM ELF64_R_SYM #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) #define ELF64_MIPS_R_TYPE(i) \ ((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_type1) #if KERNEL_ELFDATA != HOST_ELFDATA static inline void __endian(const void *src, void *dest, unsigned int size) { unsigned int i; for (i = 0; i < size; i++) ((unsigned char*)dest)[i] = ((unsigned char*)src)[size - i-1]; } #define TO_NATIVE(x) \ ({ \ typeof(x) __x; \ __endian(&(x), &(__x), sizeof(__x)); \ __x; \ }) #else /* endianness matches */ #define TO_NATIVE(x) (x) #endif #define NOFAIL(ptr) do_nofail((ptr), #ptr) void *do_nofail(void *ptr, const char *expr); struct buffer { char *p; int pos; int size; }; void __attribute__((format(printf, 2, 3))) buf_printf(struct buffer *buf, const char *fmt, ...); void buf_write(struct buffer *buf, const char *s, int len); struct namespace_list { struct namespace_list *next; char namespace[0]; }; struct module { struct module *next; const char *name; int gpl_compatible; struct symbol *unres; int seen; int skip; int has_init; int has_cleanup; struct buffer dev_table_buf; char srcversion[25]; int is_dot_o; // Required namespace dependencies struct namespace_list *required_namespaces; // Actual imported namespaces struct namespace_list *imported_namespaces; }; struct elf_info { unsigned long size; Elf_Ehdr *hdr; Elf_Shdr *sechdrs; Elf_Sym *symtab_start; Elf_Sym *symtab_stop; Elf_Section export_sec; Elf_Section export_unused_sec; Elf_Section export_gpl_sec; Elf_Section export_unused_gpl_sec; Elf_Section export_gpl_future_sec; char *ksymtab_strings; char *strtab; char *modinfo; unsigned int modinfo_len; /* support for 32bit section numbers */ unsigned int num_sections; /* max_secindex + 1 */ unsigned int secindex_strings; /* if Nth symbol table entry has .st_shndx = SHN_XINDEX, * take shndx from symtab_shndx_start[N] instead */ Elf32_Word *symtab_shndx_start; Elf32_Word *symtab_shndx_stop; }; static inline int is_shndx_special(unsigned int i) { return i != SHN_XINDEX && i >= SHN_LORESERVE && i <= SHN_HIRESERVE; } /* * Move reserved section indices SHN_LORESERVE..SHN_HIRESERVE out of * the way to -256..-1, to avoid conflicting with real section * indices. */ #define SPECIAL(i) ((i) - (SHN_HIRESERVE + 1)) /* Accessor for sym->st_shndx, hides ugliness of "64k sections" */ static inline unsigned int get_secindex(const struct elf_info *info, const Elf_Sym *sym) { if (is_shndx_special(sym->st_shndx)) return SPECIAL(sym->st_shndx); if (sym->st_shndx != SHN_XINDEX) return sym->st_shndx; return info->symtab_shndx_start[sym - info->symtab_start]; } /* file2alias.c */ extern unsigned int cross_build; void handle_moddevtable(struct module *mod, struct elf_info *info, Elf_Sym *sym, const char *symname); void add_moddevtable(struct buffer *buf, struct module *mod); /* sumversion.c */ void maybe_frob_rcs_version(const char *modfilename, char *version, void *modinfo, unsigned long modinfo_offset); void get_src_version(const char *modname, char sum[], unsigned sumlen); /* from modpost.c */ void *grab_file(const char *filename, unsigned long *size); char* get_next_line(unsigned long *pos, void *file, unsigned long size); void release_file(void *file, unsigned long size); void fatal(const char *fmt, ...); void warn(const char *fmt, ...); void merror(const char *fmt, ...);