/*- * Copyright (c) 2007-2013 Kai Wang * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $Id: elfcopy.h 3615 2018-05-17 04:12:24Z kaiwang27 $ */ #include #include #include #include "_elftc.h" /* * User specified symbol operation (strip, keep, localize, globalize, * weaken, rename, etc). */ struct symop { const char *name; const char *newname; #define SYMOP_KEEP 0x0001U #define SYMOP_STRIP 0x0002U #define SYMOP_GLOBALIZE 0x0004U #define SYMOP_LOCALIZE 0x0008U #define SYMOP_KEEPG 0x0010U #define SYMOP_WEAKEN 0x0020U #define SYMOP_REDEF 0x0040U unsigned int op; STAILQ_ENTRY(symop) symop_list; }; /* File containing symbol list. */ struct symfile { dev_t dev; ino_t ino; size_t size; char *data; unsigned int op; STAILQ_ENTRY(symfile) symfile_list; }; /* Sections to copy/remove/rename/... */ struct sec_action { const char *name; const char *addopt; const char *newname; const char *string; uint64_t lma; uint64_t vma; int64_t lma_adjust; int64_t vma_adjust; #define SF_ALLOC 0x0001U #define SF_LOAD 0x0002U #define SF_NOLOAD 0x0004U #define SF_READONLY 0x0008U #define SF_DEBUG 0x0010U #define SF_CODE 0x0020U #define SF_DATA 0x0040U #define SF_ROM 0x0080U #define SF_SHARED 0X0100U #define SF_CONTENTS 0x0200U int flags; int add; int append; int compress; int copy; int print; int remove; int rename; int setflags; int setlma; int setvma; STAILQ_ENTRY(sec_action) sac_list; }; /* Sections to add from file. */ struct sec_add { char *name; char *content; size_t size; STAILQ_ENTRY(sec_add) sadd_list; }; struct segment; /* Internal data structure for sections. */ struct section { struct segment *seg; /* containing segment */ struct segment *seg_tls; /* tls segment */ const char *name; /* section name */ char *newname; /* new section name */ Elf_Scn *is; /* input scn */ Elf_Scn *os; /* output scn */ void *buf; /* section content */ uint8_t *pad; /* section padding */ uint64_t off; /* section offset */ uint64_t sz; /* section size */ uint64_t cap; /* section capacity */ uint64_t align; /* section alignment */ uint64_t type; /* section type */ uint64_t flags; /* section flags */ uint64_t vma; /* section virtual addr */ uint64_t lma; /* section load addr */ uint64_t pad_sz;/* section padding size */ int loadable; /* whether loadable */ int pseudo; int nocopy; TAILQ_ENTRY(section) sec_list; /* next section */ }; /* Internal data structure for segments. */ struct segment { uint64_t vaddr; /* virtual addr (VMA) */ uint64_t paddr; /* physical addr (LMA) */ uint64_t off; /* file offset */ uint64_t fsz; /* file size */ uint64_t msz; /* memory size */ uint64_t type; /* segment type */ int remove; /* whether remove */ int nsec; /* number of sections contained */ struct section **v_sec; /* list of sections contained */ STAILQ_ENTRY(segment) seg_list; /* next segment */ }; /* * In-memory representation of ar(1) archive member(object). */ struct ar_obj { char *name; /* member name */ char *buf; /* member content */ void *maddr; /* mmap start address */ uid_t uid; /* user id */ gid_t gid; /* group id */ mode_t md; /* octal file permissions */ size_t size; /* member size */ time_t mtime; /* modification time */ STAILQ_ENTRY(ar_obj) objs; }; /* * Structure encapsulates the "global" data for "elfcopy" program. */ struct elfcopy { const char *progname; /* program name */ int iec; /* elfclass of input object */ Elftc_Bfd_Target_Flavor itf; /* flavour of input object */ Elftc_Bfd_Target_Flavor otf; /* flavour of output object */ const char *otgt; /* output target name */ int oec; /* elfclass of output object */ unsigned char oed; /* endianness of output object */ int oem; /* EM_XXX of output object */ int abi; /* OSABI of output object */ Elf *ein; /* ELF descriptor of input object */ Elf *eout; /* ELF descriptor of output object */ int iphnum; /* num. of input object phdr entries */ int ophnum; /* num. of output object phdr entries */ int nos; /* num. of output object sections */ enum { STRIP_NONE = 0, STRIP_ALL, STRIP_DEBUG, STRIP_DWO, STRIP_NONDEBUG, STRIP_NONDWO, STRIP_UNNEEDED } strip; #define EXECUTABLE 0x00000001U #define DYNAMIC 0x00000002U #define RELOCATABLE 0x00000004U #define SYMTAB_EXIST 0x00000010U #define SYMTAB_INTACT 0x00000020U #define KEEP_GLOBAL 0x00000040U #define DISCARD_LOCAL 0x00000080U #define WEAKEN_ALL 0x00000100U #define PRESERVE_DATE 0x00001000U #define SREC_FORCE_S3 0x00002000U #define SREC_FORCE_LEN 0x00004000U #define SET_START 0x00008000U #define GAP_FILL 0x00010000U #define WILDCARD 0x00020000U #define NO_CHANGE_WARN 0x00040000U #define SEC_ADD 0x00080000U #define SEC_APPEND 0x00100000U #define SEC_COMPRESS 0x00200000U #define SEC_PRINT 0x00400000U #define SEC_REMOVE 0x00800000U #define SEC_COPY 0x01000000U #define DISCARD_LLABEL 0x02000000U #define LOCALIZE_HIDDEN 0x04000000U int flags; /* elfcopy run control flags. */ int64_t change_addr; /* Section address adjustment. */ int64_t change_start; /* Entry point adjustment. */ uint64_t set_start; /* Entry point value. */ unsigned long srec_len; /* S-Record length. */ uint64_t pad_to; /* load address padding. */ uint8_t fill; /* gap fill value. */ char *prefix_sec; /* section prefix. */ char *prefix_alloc; /* alloc section prefix. */ char *prefix_sym; /* symbol prefix. */ char *debuglink; /* GNU debuglink file. */ struct section *symtab; /* .symtab section. */ struct section *strtab; /* .strtab section. */ struct section *shstrtab; /* .shstrtab section. */ uint64_t *secndx; /* section index map. */ uint64_t *symndx; /* symbol index map. */ unsigned char *v_rel; /* symbols needed by relocation. */ unsigned char *v_grp; /* symbols referred by section group. */ unsigned char *v_secsym; /* sections with section symbol. */ STAILQ_HEAD(, segment) v_seg; /* list of segments. */ STAILQ_HEAD(, sec_action) v_sac;/* list of section operations. */ STAILQ_HEAD(, sec_add) v_sadd; /* list of sections to add. */ STAILQ_HEAD(, symop) v_symop; /* list of symbols operations. */ STAILQ_HEAD(, symfile) v_symfile; /* list of symlist files. */ TAILQ_HEAD(, section) v_sec; /* list of sections. */ /* * Fields for the ar(1) archive. */ char *as; /* buffer for archive string table. */ size_t as_sz; /* current size of as table. */ size_t as_cap; /* capacity of as table buffer. */ uint32_t s_cnt; /* current number of symbols. */ uint32_t *s_so; /* symbol offset table. */ size_t s_so_cap; /* capacity of so table buffer. */ char *s_sn; /* symbol name table */ size_t s_sn_cap; /* capacity of sn table buffer. */ size_t s_sn_sz; /* current size of sn table. */ off_t rela_off; /* offset relative to pseudo members. */ STAILQ_HEAD(, ar_obj) v_arobj; /* archive object(member) list. */ }; void add_section(struct elfcopy *_ecp, const char *_optarg); void add_to_shstrtab(struct elfcopy *_ecp, const char *_name); void add_to_symop_list(struct elfcopy *_ecp, const char *_name, const char *_newname, unsigned int _op); void add_to_symtab(struct elfcopy *_ecp, const char *_name, uint64_t _st_value, uint64_t _st_size, uint16_t _st_shndx, unsigned char _st_info, unsigned char _st_other, int _ndx_known); int add_to_inseg_list(struct elfcopy *_ecp, struct section *_sec); void adjust_addr(struct elfcopy *_ecp); void copy_content(struct elfcopy *_ecp); void copy_data(struct section *_s); void copy_phdr(struct elfcopy *_ecp); void copy_shdr(struct elfcopy *_ecp, struct section *_s, const char *_name, int _copy, int _sec_flags); void create_binary(int _ifd, int _ofd); void create_elf(struct elfcopy *_ecp); void create_elf_from_binary(struct elfcopy *_ecp, int _ifd, const char *ifn); void create_elf_from_ihex(struct elfcopy *_ecp, int _ifd); void create_elf_from_srec(struct elfcopy *_ecp, int _ifd); struct section *create_external_section(struct elfcopy *_ecp, const char *_name, char *_newname, void *_buf, uint64_t _size, uint64_t _off, uint64_t _stype, Elf_Type _dtype, uint64_t flags, uint64_t _align, uint64_t _vma, int _loadable); void create_external_symtab(struct elfcopy *_ecp); void create_ihex(int _ifd, int _ofd); void create_pe(struct elfcopy *_ecp, int _ifd, int _ofd); void create_scn(struct elfcopy *_ecp); void create_srec(struct elfcopy *_ecp, int _ifd, int _ofd, const char *_ofn); void create_symtab(struct elfcopy *_ecp); void create_symtab_data(struct elfcopy *_ecp); void create_tempfile(char **_fn, int *_fd); void finalize_external_symtab(struct elfcopy *_ecp); void free_elf(struct elfcopy *_ecp); void free_sec_act(struct elfcopy *_ecp); void free_sec_add(struct elfcopy *_ecp); void free_symtab(struct elfcopy *_ecp); void init_shstrtab(struct elfcopy *_ecp); void insert_to_sec_list(struct elfcopy *_ecp, struct section *_sec, int _tail); struct section *insert_shtab(struct elfcopy *_ecp, int tail); int is_remove_reloc_sec(struct elfcopy *_ecp, uint32_t _sh_info); int is_remove_section(struct elfcopy *_ecp, const char *_name); struct sec_action *lookup_sec_act(struct elfcopy *_ecp, const char *_name, int _add); struct symop *lookup_symop_list(struct elfcopy *_ecp, const char *_name, unsigned int _op); void resync_sections(struct elfcopy *_ecp); void set_shstrtab(struct elfcopy *_ecp); void setup_phdr(struct elfcopy *_ecp); void update_shdr(struct elfcopy *_ecp, int _update_link); #ifndef LIBELF_AR int ac_detect_ar(int _ifd); void ac_create_ar(struct elfcopy *_ecp, int _ifd, int _ofd); #endif /* ! LIBELF_AR */