4ce6efed48
The module alias support in the kernel have a consistency check where it is checked that the size of a structure in the kernel and on the build host are the same. For cross builds this check does not make sense so detect when we do cross builds and silently skip the check in these situations. This fixes a build bug for a wireless driver when cross building for arm. Acked-by: Michael Buesch <mb@bu3sch.de> Tested-by: Gordon Farquharson <gordonfarquharson@gmail.com> Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: stable@kernel.org
157 lines
3.8 KiB
C
157 lines
3.8 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <elf.h>
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#include "elfconfig.h"
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#if KERNEL_ELFCLASS == ELFCLASS32
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#define Elf_Ehdr Elf32_Ehdr
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#define Elf_Shdr Elf32_Shdr
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#define Elf_Sym Elf32_Sym
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#define Elf_Addr Elf32_Addr
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#define Elf_Sword Elf64_Sword
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#define Elf_Section Elf32_Half
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#define ELF_ST_BIND ELF32_ST_BIND
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#define ELF_ST_TYPE ELF32_ST_TYPE
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#define Elf_Rel Elf32_Rel
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#define Elf_Rela Elf32_Rela
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#define ELF_R_SYM ELF32_R_SYM
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#define ELF_R_TYPE ELF32_R_TYPE
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#else
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#define Elf_Ehdr Elf64_Ehdr
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#define Elf_Shdr Elf64_Shdr
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#define Elf_Sym Elf64_Sym
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#define Elf_Addr Elf64_Addr
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#define Elf_Sword Elf64_Sxword
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#define Elf_Section Elf64_Half
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#define ELF_ST_BIND ELF64_ST_BIND
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#define ELF_ST_TYPE ELF64_ST_TYPE
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#define Elf_Rel Elf64_Rel
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#define Elf_Rela Elf64_Rela
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#define ELF_R_SYM ELF64_R_SYM
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#define ELF_R_TYPE ELF64_R_TYPE
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#endif
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/* The 64-bit MIPS ELF ABI uses an unusual reloc format. */
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typedef struct
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{
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Elf32_Word r_sym; /* Symbol index */
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unsigned char r_ssym; /* Special symbol for 2nd relocation */
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unsigned char r_type3; /* 3rd relocation type */
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unsigned char r_type2; /* 2nd relocation type */
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unsigned char r_type1; /* 1st relocation type */
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} _Elf64_Mips_R_Info;
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typedef union
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{
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Elf64_Xword r_info_number;
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_Elf64_Mips_R_Info r_info_fields;
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} _Elf64_Mips_R_Info_union;
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#define ELF64_MIPS_R_SYM(i) \
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((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_sym)
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#define ELF64_MIPS_R_TYPE(i) \
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((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_type1)
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#if KERNEL_ELFDATA != HOST_ELFDATA
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static inline void __endian(const void *src, void *dest, unsigned int size)
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{
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unsigned int i;
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for (i = 0; i < size; i++)
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((unsigned char*)dest)[i] = ((unsigned char*)src)[size - i-1];
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}
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#define TO_NATIVE(x) \
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({ \
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typeof(x) __x; \
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__endian(&(x), &(__x), sizeof(__x)); \
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__x; \
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})
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#else /* endianness matches */
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#define TO_NATIVE(x) (x)
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#endif
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#define NOFAIL(ptr) do_nofail((ptr), #ptr)
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void *do_nofail(void *ptr, const char *expr);
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struct buffer {
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char *p;
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int pos;
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int size;
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};
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void __attribute__((format(printf, 2, 3)))
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buf_printf(struct buffer *buf, const char *fmt, ...);
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void
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buf_write(struct buffer *buf, const char *s, int len);
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struct module {
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struct module *next;
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const char *name;
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int gpl_compatible;
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struct symbol *unres;
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int seen;
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int skip;
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int has_init;
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int has_cleanup;
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struct buffer dev_table_buf;
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char **markers;
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size_t nmarkers;
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char srcversion[25];
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};
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struct elf_info {
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unsigned long size;
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Elf_Ehdr *hdr;
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Elf_Shdr *sechdrs;
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Elf_Sym *symtab_start;
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Elf_Sym *symtab_stop;
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Elf_Section export_sec;
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Elf_Section export_unused_sec;
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Elf_Section export_gpl_sec;
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Elf_Section export_unused_gpl_sec;
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Elf_Section export_gpl_future_sec;
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Elf_Section markers_strings_sec;
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const char *strtab;
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char *modinfo;
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unsigned int modinfo_len;
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};
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/* file2alias.c */
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extern unsigned int cross_build;
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void handle_moddevtable(struct module *mod, struct elf_info *info,
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Elf_Sym *sym, const char *symname);
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void add_moddevtable(struct buffer *buf, struct module *mod);
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/* sumversion.c */
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void maybe_frob_rcs_version(const char *modfilename,
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char *version,
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void *modinfo,
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unsigned long modinfo_offset);
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void get_src_version(const char *modname, char sum[], unsigned sumlen);
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/* from modpost.c */
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void *grab_file(const char *filename, unsigned long *size);
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char* get_next_line(unsigned long *pos, void *file, unsigned long size);
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void release_file(void *file, unsigned long size);
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void fatal(const char *fmt, ...);
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void warn(const char *fmt, ...);
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void merror(const char *fmt, ...);
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