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/*-
* Copyright (c) 2010-2013 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: ld.h 3174 2015-03-27 17:13:41Z emaste $
*/
#include <sys/mman.h>
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/stat.h>
#include <ar.h>
#include <assert.h>
#include <dirent.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <fnmatch.h>
#include <gelf.h>
#include <inttypes.h>
#include <libelftc.h>
#include <libgen.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "dwarf.h"
#define oom() ld_fatal(ld, "out of memory")
#include "utarray.h"
#define uthash_fatal(msg) ld_fatal(ld, msg)
#include "uthash.h"
#include "_elftc.h"
struct ld_file;
struct ld_input_section_head;
struct ld_path;
struct ld_symbol;
struct ld_symbol_head;
struct ld_output_data_buffer;
struct ld_wildcard_match;
struct ld_ehframe_cie_head;
struct ld_ehframe_fde_head;
struct ld_section_group;
#define LD_MAX_NESTED_GROUP 16
struct ld_state {
Elftc_Bfd_Target *ls_itgt; /* input bfd target set by -b */
struct ld_file *ls_file; /* current open file */
unsigned ls_static; /* use static library */
unsigned ls_whole_archive; /* include whole archive */
unsigned ls_as_needed; /* DT_NEEDED */
unsigned ls_group_level; /* archive group level */
unsigned ls_extracted[LD_MAX_NESTED_GROUP + 1];
/* extracted from archive group */
unsigned ls_search_dir; /* search library directories */
uint64_t ls_loc_counter; /* location counter */
uint64_t ls_offset; /* cur. output section file offset */
STAILQ_HEAD(, ld_path) ls_lplist; /* search path list */
STAILQ_HEAD(, ld_path) ls_rplist; /* rpath list */
STAILQ_HEAD(, ld_path) ls_rllist; /* rpath-link list */
unsigned ls_arch_conflict; /* input arch conflict with output */
unsigned ls_first_elf_object; /* first ELF object to process */
unsigned ls_rerun; /* ld(1) restarted */
unsigned ls_archive_mb_header; /* extracted list header printed */
unsigned ls_first_output_sec; /* flag indicates 1st output section */
unsigned ls_ignore_next_plt; /* ignore next PLT relocation */
unsigned ls_version_local; /* version entry is local */
uint64_t ls_relative_reloc; /* number of *_RELATIVE relocations */
struct ld_input_section_head *ls_gc;
/* garbage collection search list */
};
struct ld {
const char *ld_progname; /* ld(1) program name */
struct ld_arch *ld_arch; /* arch-specific callbacks */
struct ld_arch *ld_arch_list; /* list of supported archs */
Elftc_Bfd_Target *ld_otgt; /* default output format */
Elftc_Bfd_Target *ld_otgt_be; /* big-endian output format */
Elftc_Bfd_Target *ld_otgt_le; /* little-endian output format */
char *ld_otgt_name; /* output format name */
char *ld_otgt_be_name; /* big-endian output format name */
char *ld_otgt_le_name; /* little-endian output format name */
struct ld_output *ld_output; /* output object */
char *ld_output_file; /* output file name */
char *ld_entry; /* entry point set by -e */
char *ld_scp_entry; /* entry point set by linker script */
char *ld_interp; /* dynamic linker */
char *ld_soname; /* DT_SONAME */
struct ld_script *ld_scp; /* linker script */
struct ld_state ld_state; /* linker state */
struct ld_strtab *ld_shstrtab; /* section name table */
struct ld_symbol_head *ld_ext_symbols; /* -u/EXTERN symbols */
struct ld_symbol_head *ld_var_symbols; /* ldscript var symbols */
struct ld_symbol *ld_sym; /* internal symbol table */
struct ld_symbol *ld_symtab_import; /* hash for import symbols */
struct ld_symbol *ld_symtab_export; /* hash for export symbols */
struct ld_symbol_defver *ld_defver; /* default version table */
struct ld_symbol_table *ld_symtab; /* .symtab symbol table */
struct ld_strtab *ld_strtab; /* .strtab string table */
struct ld_symbol_table *ld_dynsym; /* .dynsym symbol table */
struct ld_strtab *ld_dynstr; /* .dynstr string table */
struct ld_symbol_head *ld_dyn_symbols; /* dynamic symbol list */
struct ld_wildcard_match *ld_wm; /* wildcard hash table */
struct ld_input_section *ld_dynbss; /* .dynbss section */
struct ld_input_section *ld_got; /* .got section */
struct ld_ehframe_cie_head *ld_cie; /* ehframe CIE list */
struct ld_ehframe_fde_head *ld_fde; /* ehframe FDE list */
struct ld_section_group *ld_sg; /* included section groups */
unsigned char ld_common_alloc; /* always alloc space for common sym */
unsigned char ld_common_no_alloc; /* never alloc space for common sym */
unsigned char ld_emit_reloc; /* emit relocations */
unsigned char ld_gen_gnustack; /* generate PT_GNUSTACK */
unsigned char ld_print_linkmap; /* print link map */
unsigned char ld_stack_exec; /* stack executable */
unsigned char ld_stack_exec_set; /* stack executable override */
unsigned char ld_exec; /* output normal executable */
unsigned char ld_pie; /* position-independent executable */
unsigned char ld_dso; /* output shared library */
unsigned char ld_reloc; /* output relocatable object */
unsigned char ld_dynamic_link; /* perform dynamic linking */
unsigned char ld_print_version; /* linker version printed */
unsigned char ld_gc; /* perform garbage collection */
unsigned char ld_gc_print; /* print removed sections */
unsigned char ld_ehframe_hdr; /* create .eh_frame_hdr section */
STAILQ_HEAD(ld_input_head, ld_input) ld_lilist; /* input object list */
TAILQ_HEAD(ld_file_head, ld_file) ld_lflist; /* input file list */
};
void ld_err(struct ld *, const char *, ...);
void ld_fatal(struct ld *, const char *, ...);
void ld_fatal_std(struct ld *, const char *, ...);
void ld_warn(struct ld *, const char *, ...);
void ld_info(struct ld *, const char *, ...);
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