Imported Upstream version 0.8.13upstream

1 files changed, 118 insertions, 0 deletions

diff --git a/lib/end.c b/lib/end.c
new file mode 100644
index 0000000..c604239
--- /dev/null
+++ b/lib/end.c
@@ -0,0 +1,118 @@
+/*
+ * end.c - implementation of the elf_end(3) function.
+ * Copyright (C) 1995 - 2004 Michael Riepe
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ * 
+ * This library 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
+ * Library General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#include <private.h>
+
+#ifndef lint
+static const char rcsid[] = "@(#) $Id: end.c,v 1.12 2008/05/23 08:15:34 michael Exp $";
+#endif /* lint */
+
+#if HAVE_MMAP
+#include <sys/mman.h>
+#endif /* HAVE_MMAP */
+
+static void
+_elf_free(void *ptr) {
+    if (ptr) {
+	free(ptr);
+    }
+}
+
+static void
+_elf_free_scns(Elf *elf, Elf_Scn *scn) {
+    Scn_Data *sd, *tmp;
+    Elf_Scn *freescn;
+
+    for (freescn = NULL; scn; scn = scn->s_link) {
+	elf_assert(scn->s_magic == SCN_MAGIC);
+	elf_assert(scn->s_elf == elf);
+	for (sd = scn->s_data_1; sd; sd = tmp) {
+	    elf_assert(sd->sd_magic == DATA_MAGIC);
+	    elf_assert(sd->sd_scn == scn);
+	    tmp = sd->sd_link;
+	    if (sd->sd_free_data) {
+		_elf_free(sd->sd_memdata);
+	    }
+	    if (sd->sd_freeme) {
+		free(sd);
+	    }
+	}
+	if ((sd = scn->s_rawdata)) {
+	    elf_assert(sd->sd_magic == DATA_MAGIC);
+	    elf_assert(sd->sd_scn == scn);
+	    if (sd->sd_free_data) {
+		_elf_free(sd->sd_memdata);
+	    }
+	    if (sd->sd_freeme) {
+		free(sd);
+	    }
+	}
+	if (scn->s_freeme) {
+	    _elf_free(freescn);
+	    freescn = scn;
+	}
+    }
+    _elf_free(freescn);
+}
+
+int
+elf_end(Elf *elf) {
+    Elf **siblings;
+
+    if (!elf) {
+	return 0;
+    }
+    elf_assert(elf->e_magic == ELF_MAGIC);
+    if (--elf->e_count) {
+	return elf->e_count;
+    }
+    if (elf->e_parent) {
+	elf_assert(elf->e_parent->e_magic == ELF_MAGIC);
+	elf_assert(elf->e_parent->e_kind == ELF_K_AR);
+	siblings = &elf->e_parent->e_members;
+	while (*siblings) {
+	    if (*siblings == elf) {
+		*siblings = elf->e_link;
+		break;
+	    }
+	    siblings = &(*siblings)->e_link;
+	}
+	elf_end(elf->e_parent);
+	_elf_free(elf->e_arhdr);
+    }
+#if HAVE_MMAP
+    else if (elf->e_unmap_data) {
+	munmap(elf->e_data, elf->e_size);
+    }
+#endif /* HAVE_MMAP */
+    else if (!elf->e_memory) {
+	_elf_free(elf->e_data);
+    }
+    _elf_free_scns(elf, elf->e_scn_1);
+    if (elf->e_rawdata != elf->e_data) {
+	_elf_free(elf->e_rawdata);
+    }
+    if (elf->e_free_syms) {
+	_elf_free(elf->e_symtab);
+    }
+    _elf_free(elf->e_ehdr);
+    _elf_free(elf->e_phdr);
+    free(elf);
+    return 0;
+}