314 lines
10 KiB
C
314 lines
10 KiB
C
/*-
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* Copyright (c) 2007-2013 Kai Wang
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: elfcopy.h 2970 2013-12-01 15:22:12Z kaiwang27 $
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*/
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#include <sys/queue.h>
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#include <gelf.h>
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#include <libelftc.h>
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#include "_elftc.h"
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/*
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* User specified symbol operation (strip, keep, localize, globalize,
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* weaken, rename, etc).
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*/
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struct symop {
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const char *name;
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const char *newname;
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#define SYMOP_KEEP 0x0001U
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#define SYMOP_STRIP 0x0002U
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#define SYMOP_GLOBALIZE 0x0004U
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#define SYMOP_LOCALIZE 0x0008U
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#define SYMOP_KEEPG 0x0010U
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#define SYMOP_WEAKEN 0x0020U
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#define SYMOP_REDEF 0x0040U
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unsigned int op;
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STAILQ_ENTRY(symop) symop_list;
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};
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/* File containing symbol list. */
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struct symfile {
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dev_t dev;
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ino_t ino;
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size_t size;
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char *data;
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unsigned int op;
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STAILQ_ENTRY(symfile) symfile_list;
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};
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/* Sections to copy/remove/rename/... */
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struct sec_action {
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const char *name;
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const char *addopt;
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const char *newname;
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const char *string;
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uint64_t lma;
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uint64_t vma;
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int64_t lma_adjust;
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int64_t vma_adjust;
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#define SF_ALLOC 0x0001U
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#define SF_LOAD 0x0002U
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#define SF_NOLOAD 0x0004U
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#define SF_READONLY 0x0008U
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#define SF_DEBUG 0x0010U
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#define SF_CODE 0x0020U
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#define SF_DATA 0x0040U
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#define SF_ROM 0x0080U
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#define SF_SHARED 0X0100U
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#define SF_CONTENTS 0x0200U
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int flags;
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int add;
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int append;
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int compress;
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int copy;
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int print;
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int remove;
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int rename;
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int setflags;
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int setlma;
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int setvma;
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STAILQ_ENTRY(sec_action) sac_list;
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};
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/* Sections to add from file. */
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struct sec_add {
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char *name;
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char *content;
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size_t size;
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STAILQ_ENTRY(sec_add) sadd_list;
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};
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struct segment;
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/* Internal data structure for sections. */
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struct section {
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struct segment *seg; /* containing segment */
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const char *name; /* section name */
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char *newname; /* new section name */
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Elf_Scn *is; /* input scn */
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Elf_Scn *os; /* output scn */
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void *buf; /* section content */
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uint8_t *pad; /* section padding */
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uint64_t off; /* section offset */
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uint64_t sz; /* section size */
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uint64_t cap; /* section capacity */
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uint64_t align; /* section alignment */
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uint64_t type; /* section type */
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uint64_t vma; /* section virtual addr */
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uint64_t lma; /* section load addr */
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uint64_t pad_sz;/* section padding size */
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int loadable; /* whether loadable */
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int pseudo;
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int nocopy;
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TAILQ_ENTRY(section) sec_list; /* next section */
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};
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/* Internal data structure for segments. */
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struct segment {
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uint64_t addr; /* load addr */
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uint64_t off; /* file offset */
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uint64_t fsz; /* file size */
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uint64_t msz; /* memory size */
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uint64_t type; /* segment type */
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int remove; /* whether remove */
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int nsec; /* number of sections contained */
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struct section **v_sec; /* list of sections contained */
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STAILQ_ENTRY(segment) seg_list; /* next segment */
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};
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/*
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* In-memory representation of ar(1) archive member(object).
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*/
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struct ar_obj {
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char *name; /* member name */
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char *buf; /* member content */
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void *maddr; /* mmap start address */
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uid_t uid; /* user id */
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gid_t gid; /* group id */
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mode_t md; /* octal file permissions */
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size_t size; /* member size */
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time_t mtime; /* modification time */
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STAILQ_ENTRY(ar_obj) objs;
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};
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/*
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* Structure encapsulates the "global" data for "elfcopy" program.
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*/
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struct elfcopy {
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const char *progname; /* program name */
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int iec; /* elfclass of input object */
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Elftc_Bfd_Target_Flavor itf; /* flavour of input object */
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Elftc_Bfd_Target_Flavor otf; /* flavour of output object */
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const char *otgt; /* output target name */
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int oec; /* elfclass of output object */
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unsigned char oed; /* endianess of output object */
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int oem; /* EM_XXX of output object */
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int abi; /* OSABI of output object */
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Elf *ein; /* ELF descriptor of input object */
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Elf *eout; /* ELF descriptor of output object */
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int iphnum; /* num. of input object phdr entries */
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int ophnum; /* num. of output object phdr entries */
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int nos; /* num. of output object sections */
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enum {
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STRIP_NONE = 0,
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STRIP_ALL,
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STRIP_DEBUG,
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STRIP_NONDEBUG,
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STRIP_UNNEEDED
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} strip;
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#define EXECUTABLE 0x00000001U
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#define DYNAMIC 0x00000002U
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#define RELOCATABLE 0x00000004U
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#define SYMTAB_EXIST 0x00000010U
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#define SYMTAB_INTACT 0x00000020U
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#define KEEP_GLOBAL 0x00000040U
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#define DISCARD_LOCAL 0x00000080U
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#define WEAKEN_ALL 0x00000100U
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#define PRESERVE_DATE 0x00001000U
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#define SREC_FORCE_S3 0x00002000U
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#define SREC_FORCE_LEN 0x00004000U
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#define SET_START 0x00008000U
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#define GAP_FILL 0x00010000U
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#define WILDCARD 0x00020000U
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#define NO_CHANGE_WARN 0x00040000U
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#define SEC_ADD 0x00080000U
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#define SEC_APPEND 0x00100000U
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#define SEC_COMPRESS 0x00200000U
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#define SEC_PRINT 0x00400000U
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#define SEC_REMOVE 0x00800000U
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#define SEC_COPY 0x01000000U
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#define DISCARD_LLABEL 0x02000000U
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int flags; /* elfcopy run control flags. */
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int64_t change_addr; /* Section address adjustment. */
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int64_t change_start; /* Entry point adjustment. */
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uint64_t set_start; /* Entry point value. */
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unsigned long srec_len; /* S-Record length. */
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uint64_t pad_to; /* load address padding. */
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uint8_t fill; /* gap fill value. */
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char *prefix_sec; /* section prefix. */
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char *prefix_alloc; /* alloc section prefix. */
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char *prefix_sym; /* symbol prefix. */
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char *debuglink; /* GNU debuglink file. */
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struct section *symtab; /* .symtab section. */
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struct section *strtab; /* .strtab section. */
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struct section *shstrtab; /* .shstrtab section. */
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uint64_t *secndx; /* section index map. */
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uint64_t *symndx; /* symbol index map. */
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unsigned char *v_rel; /* symbols needed by relocation. */
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unsigned char *v_secsym; /* sections with section symbol. */
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STAILQ_HEAD(, segment) v_seg; /* list of segments. */
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STAILQ_HEAD(, sec_action) v_sac;/* list of section operations. */
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STAILQ_HEAD(, sec_add) v_sadd; /* list of sections to add. */
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STAILQ_HEAD(, symop) v_symop; /* list of symbols operations. */
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STAILQ_HEAD(, symfile) v_symfile; /* list of symlist files. */
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TAILQ_HEAD(, section) v_sec; /* list of sections. */
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/*
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* Fields for the ar(1) archive.
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*/
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char *as; /* buffer for archive string table. */
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size_t as_sz; /* current size of as table. */
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size_t as_cap; /* capacity of as table buffer. */
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uint32_t s_cnt; /* current number of symbols. */
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uint32_t *s_so; /* symbol offset table. */
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size_t s_so_cap; /* capacity of so table buffer. */
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char *s_sn; /* symbol name table */
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size_t s_sn_cap; /* capacity of sn table buffer. */
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size_t s_sn_sz; /* current size of sn table. */
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off_t rela_off; /* offset relative to pseudo members. */
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STAILQ_HEAD(, ar_obj) v_arobj; /* archive object(member) list. */
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};
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void add_section(struct elfcopy *_ecp, const char *_optarg);
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void add_to_shstrtab(struct elfcopy *_ecp, const char *_name);
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void add_to_symop_list(struct elfcopy *_ecp, const char *_name,
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const char *_newname, unsigned int _op);
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void add_to_symtab(struct elfcopy *_ecp, const char *_name,
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uint64_t _st_value, uint64_t _st_size, uint16_t _st_shndx,
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unsigned char _st_info, unsigned char _st_other, int _ndx_known);
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int add_to_inseg_list(struct elfcopy *_ecp, struct section *_sec);
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void adjust_addr(struct elfcopy *_ecp);
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void copy_content(struct elfcopy *_ecp);
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void copy_data(struct section *_s);
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void copy_phdr(struct elfcopy *_ecp);
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void copy_shdr(struct elfcopy *_ecp, struct section *_s, const char *_name,
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int _copy, int _sec_flags);
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void create_binary(int _ifd, int _ofd);
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void create_elf(struct elfcopy *_ecp);
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void create_elf_from_binary(struct elfcopy *_ecp, int _ifd, const char *ifn);
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void create_elf_from_ihex(struct elfcopy *_ecp, int _ifd);
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void create_elf_from_srec(struct elfcopy *_ecp, int _ifd);
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struct section *create_external_section(struct elfcopy *_ecp, const char *_name,
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char *_newname, void *_buf, uint64_t _size, uint64_t _off, uint64_t _stype,
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Elf_Type _dtype, uint64_t flags, uint64_t _align, uint64_t _vma,
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int _loadable);
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void create_external_symtab(struct elfcopy *_ecp);
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void create_ihex(int _ifd, int _ofd);
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void create_scn(struct elfcopy *_ecp);
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void create_srec(struct elfcopy *_ecp, int _ifd, int _ofd, const char *_ofn);
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void create_symtab(struct elfcopy *_ecp);
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void create_symtab_data(struct elfcopy *_ecp);
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void create_tempfile(char **_fn, int *_fd);
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void finalize_external_symtab(struct elfcopy *_ecp);
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void free_elf(struct elfcopy *_ecp);
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void free_sec_act(struct elfcopy *_ecp);
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void free_sec_add(struct elfcopy *_ecp);
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void free_symtab(struct elfcopy *_ecp);
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void init_shstrtab(struct elfcopy *_ecp);
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void insert_to_sec_list(struct elfcopy *_ecp, struct section *_sec,
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int _tail);
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struct section *insert_shtab(struct elfcopy *_ecp, int tail);
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int is_remove_reloc_sec(struct elfcopy *_ecp, uint32_t _sh_info);
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int is_remove_section(struct elfcopy *_ecp, const char *_name);
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struct sec_action *lookup_sec_act(struct elfcopy *_ecp,
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const char *_name, int _add);
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struct symop *lookup_symop_list(struct elfcopy *_ecp, const char *_name,
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unsigned int _op);
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void resync_sections(struct elfcopy *_ecp);
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void set_shstrtab(struct elfcopy *_ecp);
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void setup_phdr(struct elfcopy *_ecp);
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void update_shdr(struct elfcopy *_ecp, int _update_link);
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#ifndef LIBELF_AR
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int ac_detect_ar(int _ifd);
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void ac_create_ar(struct elfcopy *_ecp, int _ifd, int _ofd);
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#endif /* ! LIBELF_AR */
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