diff options
Diffstat (limited to 'ld/ld_main.c')
| -rw-r--r-- | ld/ld_main.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/ld/ld_main.c b/ld/ld_main.c new file mode 100644 index 0000000000000..4dcae0147210b --- /dev/null +++ b/ld/ld_main.c @@ -0,0 +1,145 @@ +/*- + * 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. + */ + +#include "ld.h" +#include "ld_arch.h" +#include "ld_ehframe.h" +#include "ld_options.h" +#include "ld_reloc.h" +#include "ld_script.h" +#include "ld_file.h" +#include "ld_input.h" +#include "ld_layout.h" +#include "ld_output.h" +#include "ld_path.h" +#include "ld_symbols.h" + +ELFTC_VCSID("$Id: ld_main.c 2959 2013-08-25 03:12:47Z kaiwang27 $"); + +static struct ld _ld; +struct ld* ld = &_ld; + +static void +_init(void) +{ + + if ((ld->ld_progname = ELFTC_GETPROGNAME()) == NULL) + ld->ld_progname = "ld"; + + /* Initialise libelf. */ + if (elf_version(EV_CURRENT) == EV_NONE) + ld_fatal(ld, "ELF library initialization failed: %s", + elf_errmsg(-1)); + + /* Initialise internal data structure. */ + TAILQ_INIT(&ld->ld_lflist); + STAILQ_INIT(&ld->ld_lilist); + STAILQ_INIT(&ld->ld_state.ls_lplist); + STAILQ_INIT(&ld->ld_state.ls_rplist); + STAILQ_INIT(&ld->ld_state.ls_rllist); +} + +static void +_cleanup(void) +{ + + ld_script_cleanup(ld); + ld_symbols_cleanup(ld); + ld_path_cleanup(ld); + ld_input_cleanup(ld); + ld_file_cleanup(ld); +} + +int +main(int argc, char **argv) +{ + struct ld_state *ls; + + _init(); + + ls = &ld->ld_state; + + ld->ld_progname = basename(argv[0]); + + ld_arch_init(ld); + +restart: + + /* The linker generate an executable by default */ + ld->ld_exec = 1; + + ld_script_init(ld); + + ld_options_parse(ld, argc, argv); + + ld_output_early_init(ld); + + ls->ls_arch_conflict = 0; + ls->ls_first_elf_object = 1; + + ld_input_init(ld); + + ld_symbols_resolve(ld); + + if (ls->ls_arch_conflict) { + _cleanup(); + ls->ls_rerun = 1; + goto restart; + } + + ld_reloc_load(ld); + + /* + * Perform section garbage collection if command line option + * -gc-sections is specified. Perform deferred relocation scan + * after garbage sections are found. + */ + if (ld->ld_gc) { + ld_reloc_gc_sections(ld); + ld_reloc_deferred_scan(ld); + } + + /* + * Search for undefined symbols and allocate space for common + * symbols. Copy relevant symbols to the dynamic symbol table + * if the linker is performing a dyanmic linking. + */ + ld_symbols_scan(ld); + + /* Create .eh_frame_hdr section. */ + if (ld->ld_ehframe_hdr) + ld_ehframe_create_hdr(ld); + + ld_output_init(ld); + + ld_layout_sections(ld); + + ld_output_create(ld); + + _cleanup(); + + exit(EXIT_SUCCESS); +} |