diff options
Diffstat (limited to 'libasm/asm_begin.c')
| -rw-r--r-- | libasm/asm_begin.c | 114 |
1 files changed, 72 insertions, 42 deletions
diff --git a/libasm/asm_begin.c b/libasm/asm_begin.c index 3896f78f..b8094dcd 100644 --- a/libasm/asm_begin.c +++ b/libasm/asm_begin.c @@ -1,16 +1,28 @@ /* Create descriptor for assembling. Copyright (C) 2002 Red Hat, Inc. + This file is part of Red Hat elfutils. Written by Ulrich Drepper <drepper@redhat.com>, 2002. - This program is Open Source software; you can redistribute it and/or - modify it under the terms of the Open Software License version 1.0 as - published by the Open Source Initiative. + Red Hat elfutils is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by the + Free Software Foundation; version 2 of the License. - You should have received a copy of the Open Software License along - with this program; if not, you may obtain a copy of the Open Software - License version 1.0 from http://www.opensource.org/licenses/osl.php or - by writing the Open Source Initiative c/o Lawrence Rosen, Esq., - 3001 King Ranch Road, Ukiah, CA 95482. */ + Red Hat elfutils is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License along + with Red Hat elfutils; if not, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. + + Red Hat elfutils is an included package of the Open Invention Network. + An included package of the Open Invention Network is a package for which + Open Invention Network licensees cross-license their patents. No patent + license is granted, either expressly or impliedly, by designation as an + included package. Should you wish to participate in the Open Invention + Network licensing program, please visit www.openinventionnetwork.com + <http://www.openinventionnetwork.com>. */ #ifdef HAVE_CONFIG_H # include <config.h> @@ -18,6 +30,8 @@ #include <assert.h> #include <errno.h> +#include <stdio.h> +#include <stdio_ext.h> #include <stdlib.h> #include <string.h> #include <unistd.h> @@ -30,12 +44,27 @@ static AsmCtx_t * prepare_text_output (AsmCtx_t *result) { + if (result->fd == -1) + result->out.file = stdout; + else + { + result->out.file = fdopen (result->fd, "a"); + if (result->out.file == NULL) + { + close (result->fd); + free (result); + result = NULL; + } + + __fsetlocking (result->out.file, FSETLOCKING_BYCALLER); + } + return result; } static AsmCtx_t * -prepare_binary_output (AsmCtx_t *result, int machine, int klass, int data) +prepare_binary_output (AsmCtx_t *result, Ebl *ebl) { GElf_Ehdr *ehdr; GElf_Ehdr ehdr_mem; @@ -53,7 +82,8 @@ prepare_binary_output (AsmCtx_t *result, int machine, int klass, int data) } /* Create the ELF header for the output file. */ - if (gelf_newehdr (result->out.elf, klass) == 0) + int class = ebl_get_elfclass (ebl); + if (gelf_newehdr (result->out.elf, class) == 0) goto err_libelf; ehdr = gelf_getehdr (result->out.elf, &ehdr_mem); @@ -65,11 +95,10 @@ prepare_binary_output (AsmCtx_t *result, int machine, int klass, int data) /* Set the ELF version. */ ehdr->e_version = EV_CURRENT; - /* Use the machine value the user provided. */ - ehdr->e_machine = machine; - /* Same for the class and endianness. */ - ehdr->e_ident[EI_CLASS] = klass; - ehdr->e_ident[EI_DATA] = data; + /* Use the machine, class, and endianess values from the Ebl descriptor. */ + ehdr->e_machine = ebl_get_elfmachine (ebl); + ehdr->e_ident[EI_CLASS] = class; + ehdr->e_ident[EI_DATA] = ebl_get_elfdata (ebl); memcpy (&ehdr->e_ident[EI_MAG0], ELFMAG, SELFMAG); @@ -95,47 +124,48 @@ prepare_binary_output (AsmCtx_t *result, int machine, int klass, int data) AsmCtx_t * -asm_begin (fname, textp, machine, klass, data) +asm_begin (fname, ebl, textp) const char *fname; + Ebl *ebl; bool textp; - int machine; - int klass; - int data; { - size_t fname_len = strlen (fname); - AsmCtx_t *result; - + if (fname == NULL && ! textp) + return NULL; - /* First order of business: find the appropriate backend. If it - does not exist we don't have to look further. */ - // XXX + size_t fname_len = fname != NULL ? strlen (fname) : 0; /* Create the file descriptor. We do not generate the output file right away. Instead we create a temporary file in the same directory which, if everything goes alright, will replace a possibly existing file with the given name. */ - result = (AsmCtx_t *) malloc (sizeof (AsmCtx_t) + 2 * fname_len + 9); + AsmCtx_t *result + = (AsmCtx_t *) malloc (sizeof (AsmCtx_t) + 2 * fname_len + 9); if (result == NULL) return NULL; - /* Initialize the lock. */ - rwlock_init (result->lock); + /* Initialize the lock. */ + rwlock_init (result->lock); - /* Create the name of the temporary file. */ - result->fname = stpcpy (mempcpy (result->tmp_fname, fname, fname_len), - ".XXXXXX") + 1; - memcpy (result->fname, fname, fname_len + 1); - - /* Create the temporary file. */ - result->fd = mkstemp (result->tmp_fname); - if (result->fd == -1) + if (fname != NULL) { - int save_errno = errno; - free (result); - __libasm_seterrno (ASM_E_CANNOT_CREATE); - errno = save_errno; - return NULL; + /* Create the name of the temporary file. */ + result->fname = stpcpy (mempcpy (result->tmp_fname, fname, fname_len), + ".XXXXXX") + 1; + memcpy (result->fname, fname, fname_len + 1); + + /* Create the temporary file. */ + result->fd = mkstemp (result->tmp_fname); + if (result->fd == -1) + { + int save_errno = errno; + free (result); + __libasm_seterrno (ASM_E_CANNOT_CREATE); + errno = save_errno; + return NULL; + } } + else + result->fd = -1; /* Initialize the counter for temporary symbols. */ result->tempsym_count = 0; @@ -145,7 +175,7 @@ asm_begin (fname, textp, machine, klass, data) if (textp) result = prepare_text_output (result); else - result = prepare_binary_output (result, machine, klass, data); + result = prepare_binary_output (result, ebl); return result; } |