1441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project/* Create descriptor for assembling. 2441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project Copyright (C) 2002 Red Hat, Inc. 3cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng This file is part of Red Hat elfutils. 4441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project Written by Ulrich Drepper <drepper@redhat.com>, 2002. 5441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 6cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Red Hat elfutils is free software; you can redistribute it and/or modify 7cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng it under the terms of the GNU General Public License as published by the 8cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Free Software Foundation; version 2 of the License. 9441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 10cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Red Hat elfutils is distributed in the hope that it will be useful, but 11cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng WITHOUT ANY WARRANTY; without even the implied warranty of 12cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng General Public License for more details. 14cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng 15cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng You should have received a copy of the GNU General Public License along 16cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng with Red Hat elfutils; if not, write to the Free Software Foundation, 17cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. 18cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng 19cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Red Hat elfutils is an included package of the Open Invention Network. 20cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng An included package of the Open Invention Network is a package for which 21cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Open Invention Network licensees cross-license their patents. No patent 22cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng license is granted, either expressly or impliedly, by designation as an 23cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng included package. Should you wish to participate in the Open Invention 24cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Network licensing program, please visit www.openinventionnetwork.com 25cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng <http://www.openinventionnetwork.com>. */ 26441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 27441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#ifdef HAVE_CONFIG_H 28441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project# include <config.h> 29441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#endif 30441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 31441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include <assert.h> 32441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include <errno.h> 33cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng#include <stdio.h> 34cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng#include <stdio_ext.h> 35441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include <stdlib.h> 36441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include <string.h> 37441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include <unistd.h> 38441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 39441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include <gelf.h> 40441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include "libasmP.h" 41441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include <system.h> 42441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 43441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 44441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectstatic AsmCtx_t * 45441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectprepare_text_output (AsmCtx_t *result) 46441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 47cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng if (result->fd == -1) 48cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng result->out.file = stdout; 49cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng else 50cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng { 51cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng result->out.file = fdopen (result->fd, "a"); 52cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng if (result->out.file == NULL) 53cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng { 54cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng close (result->fd); 55cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng free (result); 56cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng result = NULL; 57cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng } 58cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng 59cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng __fsetlocking (result->out.file, FSETLOCKING_BYCALLER); 60cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng } 61cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng 62441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return result; 63441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project} 64441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 65441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 66441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectstatic AsmCtx_t * 67cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Chengprepare_binary_output (AsmCtx_t *result, Ebl *ebl) 68441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 69441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project GElf_Ehdr *ehdr; 70441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project GElf_Ehdr ehdr_mem; 71441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 72441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Create the ELF descriptor for the file. */ 73441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project result->out.elf = elf_begin (result->fd, ELF_C_WRITE_MMAP, NULL); 74441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (result->out.elf == NULL) 75441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 76441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project err_libelf: 77441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project unlink (result->tmp_fname); 78441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project close (result->fd); 79441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project free (result); 80441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project __libasm_seterrno (ASM_E_LIBELF); 81441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return NULL; 82441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 83441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 84441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Create the ELF header for the output file. */ 85cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng int class = ebl_get_elfclass (ebl); 86cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng if (gelf_newehdr (result->out.elf, class) == 0) 87441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project goto err_libelf; 88441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 89441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project ehdr = gelf_getehdr (result->out.elf, &ehdr_mem); 90441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* If this failed we are in trouble. */ 91441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project assert (ehdr != NULL); 92441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 93441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* We create an object file. */ 94441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project ehdr->e_type = ET_REL; 95441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Set the ELF version. */ 96441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project ehdr->e_version = EV_CURRENT; 97441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 98cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng /* Use the machine, class, and endianess values from the Ebl descriptor. */ 99cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng ehdr->e_machine = ebl_get_elfmachine (ebl); 100cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng ehdr->e_ident[EI_CLASS] = class; 101cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng ehdr->e_ident[EI_DATA] = ebl_get_elfdata (ebl); 102441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 103441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project memcpy (&ehdr->e_ident[EI_MAG0], ELFMAG, SELFMAG); 104441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 105441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Write the ELF header information back. */ 106441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project (void) gelf_update_ehdr (result->out.elf, ehdr); 107441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 108441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* No section so far. */ 109441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project result->section_list = NULL; 110441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 111441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Initialize the hash table. */ 112441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project asm_symbol_tab_init (&result->symbol_tab, 67); 113441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project result->nsymbol_tab = 0; 114441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* And the string tables. */ 115441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project result->section_strtab = ebl_strtabinit (true); 116441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project result->symbol_strtab = ebl_strtabinit (true); 117441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 118441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* We have no section groups so far. */ 119441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project result->groups = NULL; 120441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project result->ngroups = 0; 121441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 122441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return result; 123441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project} 124441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 125441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 126441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source ProjectAsmCtx_t * 127cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Chengasm_begin (fname, ebl, textp) 128441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project const char *fname; 129cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Ebl *ebl; 130441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project bool textp; 131441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 132cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng if (fname == NULL && ! textp) 133cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng return NULL; 134441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 135cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng size_t fname_len = fname != NULL ? strlen (fname) : 0; 136441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 137441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Create the file descriptor. We do not generate the output file 138441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project right away. Instead we create a temporary file in the same 139441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project directory which, if everything goes alright, will replace a 140441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project possibly existing file with the given name. */ 141cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng AsmCtx_t *result 142cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng = (AsmCtx_t *) malloc (sizeof (AsmCtx_t) + 2 * fname_len + 9); 143441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (result == NULL) 144441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return NULL; 145441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 146cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng /* Initialize the lock. */ 147cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng rwlock_init (result->lock); 148441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 149cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng if (fname != NULL) 150441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 151cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng /* Create the name of the temporary file. */ 152cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng result->fname = stpcpy (mempcpy (result->tmp_fname, fname, fname_len), 153cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng ".XXXXXX") + 1; 154cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng memcpy (result->fname, fname, fname_len + 1); 155cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng 156cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng /* Create the temporary file. */ 157cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng result->fd = mkstemp (result->tmp_fname); 158cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng if (result->fd == -1) 159cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng { 160cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng int save_errno = errno; 161cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng free (result); 162cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng __libasm_seterrno (ASM_E_CANNOT_CREATE); 163cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng errno = save_errno; 164cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng return NULL; 165cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng } 166441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 167cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng else 168cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng result->fd = -1; 169441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 170441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Initialize the counter for temporary symbols. */ 171441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project result->tempsym_count = 0; 172441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 173441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Now we differentiate between textual and binary output. */ 174441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project result->textp = textp; 175441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (textp) 176441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project result = prepare_text_output (result); 177441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project else 178cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng result = prepare_binary_output (result, ebl); 179441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 180441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return result; 181441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project} 182