Adding gem5 source to svn.

git-svn-id: https://www4.informatik.uni-erlangen.de/i4svn/danceos/trunk/devel/fail@1819 8c4709b5-6ec9-48aa-a5cd-a96041d1645a

simulators/gem5/ext/libelf/libelf_allocate.c

@@ -0,0 +1,206 @@
+/*-
+ * Copyright (c) 2006 Joseph Koshy
+ * 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.
+ */
+
+/*
+ * Internal APIs
+ */
+
+#include <errno.h>
+
+#include <assert.h>
+#include "libelf.h"
+#include <stdlib.h>
+#include <string.h>
+
+#include "_libelf.h"
+
+Elf *
+_libelf_allocate_elf(void)
+{
+        Elf *e;
+
+        if ((e = malloc(sizeof(*e))) == NULL) {
+                LIBELF_SET_ERROR(RESOURCE, errno);
+                return NULL;
+        }
+
+        e->e_activations = 1;
+        e->e_arhdr	 = NULL;
+        e->e_byteorder   = ELFDATANONE;
+        e->e_class       = ELFCLASSNONE;
+        e->e_cmd         = ELF_C_NULL;
+        e->e_fd          = -1;
+        e->e_flags	 = 0;
+        e->e_kind        = ELF_K_NONE;
+        e->e_parent      = NULL;
+        e->e_rawfile     = NULL;
+        e->e_rawsize     = 0;
+        e->e_version     = LIBELF_PRIVATE(version);
+
+        (void) memset(&e->e_u, 0, sizeof(e->e_u));
+
+        return (e);
+}
+
+void
+_libelf_init_elf(Elf *e, Elf_Kind kind)
+{
+        assert(e != NULL);
+        assert(e->e_kind == ELF_K_NONE);
+
+        e->e_kind = kind;
+
+        switch (kind) {
+        case ELF_K_ELF:
+                STAILQ_INIT(&e->e_u.e_elf.e_scn);
+                break;
+        default:
+                break;
+        }
+}
+
+#define	FREE(P)		do {				\
+                if (P)					\
+                        free(P);			\
+        } while (0)
+
+
+Elf *
+_libelf_release_elf(Elf *e)
+{
+        switch (e->e_kind) {
+        case ELF_K_AR:
+                FREE(e->e_u.e_ar.e_symtab);
+                break;
+
+        case ELF_K_ELF:
+                switch (e->e_class) {
+                case ELFCLASS32:
+                        FREE(e->e_u.e_elf.e_ehdr.e_ehdr32);
+                        FREE(e->e_u.e_elf.e_phdr.e_phdr32);
+                        break;
+                case ELFCLASS64:
+                        FREE(e->e_u.e_elf.e_ehdr.e_ehdr64);
+                        FREE(e->e_u.e_elf.e_phdr.e_phdr64);
+                        break;
+                }
+
+                assert(STAILQ_EMPTY(&e->e_u.e_elf.e_scn));
+
+                if (e->e_arhdr) {
+                        FREE(e->e_arhdr->ar_name);
+                        FREE(e->e_arhdr->ar_rawname);
+                        free(e->e_arhdr);
+                }
+
+                break;
+
+        default:
+                break;
+        }
+
+        free(e);
+
+        return (NULL);
+}
+
+Elf_Data *
+_libelf_allocate_data(Elf_Scn *s)
+{
+        Elf_Data *d;
+
+        if ((d = calloc((size_t) 1, sizeof(Elf_Data))) == NULL) {
+                LIBELF_SET_ERROR(RESOURCE, 0);
+                return (NULL);
+        }
+
+        d->d_scn = s;
+
+        return (d);
+}
+
+Elf_Data *
+_libelf_release_data(Elf_Data *d)
+{
+
+        if (d->d_flags & LIBELF_F_MALLOCED)
+                free(d->d_buf);
+
+        free(d);
+
+        return (NULL);
+}
+
+Elf_Scn *
+_libelf_allocate_scn(Elf *e, size_t ndx)
+{
+        Elf_Scn *s;
+
+        if ((s = calloc((size_t) 1, sizeof(Elf_Scn))) == NULL) {
+                LIBELF_SET_ERROR(RESOURCE, errno);
+                return (NULL);
+        }
+
+        s->s_elf = e;
+        s->s_ndx = ndx;
+
+        STAILQ_INIT(&s->s_data);
+        STAILQ_INIT(&s->s_rawdata);
+
+        STAILQ_INSERT_TAIL(&e->e_u.e_elf.e_scn, s, s_next);
+
+        return (s);
+}
+
+Elf_Scn *
+_libelf_release_scn(Elf_Scn *s)
+{
+        Elf *e;
+        Elf_Data *d, *td;
+
+        assert(s != NULL);
+
+        STAILQ_FOREACH_SAFE(d, &s->s_data, d_next, td) {
+                STAILQ_REMOVE(&s->s_data, d, _Elf_Data, d_next);
+                d = _libelf_release_data(d);
+        }
+
+        STAILQ_FOREACH_SAFE(d, &s->s_rawdata, d_next, td) {
+                assert((d->d_flags & LIBELF_F_MALLOCED) == 0);
+                STAILQ_REMOVE(&s->s_rawdata, d, _Elf_Data, d_next);
+                d = _libelf_release_data(d);
+        }
+
+        e = s->s_elf;
+
+        assert(e != NULL);
+
+        STAILQ_REMOVE(&e->e_u.e_elf.e_scn, s, _Elf_Scn, s_next);
+
+        free(s);
+
+        return (NULL);
+}