Imported Upstream version 0.8.13upstream

1 files changed, 112 insertions, 0 deletions

diff --git a/lib/x.movscn.c b/lib/x.movscn.c
new file mode 100644
index 0000000..4f3d9d2
--- /dev/null
+++ b/lib/x.movscn.c
@@ -0,0 +1,112 @@
+/*
+x.movscn.c - implementation of the elfx_movscn(3) function.
+Copyright (C) 1995 - 2001, 2003 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: x.movscn.c,v 1.14 2008/05/23 08:15:35 michael Exp $";
+#endif /* lint */
+
+size_t
+elfx_movscn(Elf *elf, Elf_Scn *scn, Elf_Scn *after) {
+    Elf_Scn *prev;
+    Elf_Scn *tmp;
+    int off;
+
+    if (!elf || !scn || !after) {
+	return SHN_UNDEF;
+    }
+    elf_assert(elf->e_magic == ELF_MAGIC);
+    if (elf->e_kind != ELF_K_ELF) {
+	seterr(ERROR_NOTELF);
+	return SHN_UNDEF;
+    }
+    elf_assert(scn->s_magic == SCN_MAGIC);
+    elf_assert(after->s_magic == SCN_MAGIC);
+    if (scn->s_elf != elf || after->s_elf != elf) {
+	seterr(ERROR_ELFSCNMISMATCH);
+	return SHN_UNDEF;
+    }
+    elf_assert(elf->e_scn_1);
+    if (scn == elf->e_scn_1) {
+	seterr(ERROR_NULLSCN);
+	return SHN_UNDEF;
+    }
+    if (scn == after || scn == after->s_link) {
+	/* nothing to do */
+	return scn->s_index;
+    }
+
+    /*
+     * Find previous section.
+     */
+    prev = NULL;
+    for (tmp = elf->e_scn_1; tmp->s_link; tmp = tmp->s_link) {
+	if (tmp->s_link == scn) {
+	    prev = tmp;
+	    break;
+	}
+    }
+    elf_assert(prev != NULL);
+
+    /*
+     * Update section indices
+     */
+    off = 0;
+    for (tmp = elf->e_scn_1; tmp; tmp = tmp->s_link) {
+	if (off) {
+	    tmp->s_index += off;
+	}
+	if (tmp == after) {
+	    off++;
+	}
+	else if (tmp == scn) {
+	    off--;
+	}
+    }
+    elf_assert(off == 0);
+
+    /*
+     * Move section.
+     */
+    prev->s_link = scn->s_link;
+    scn->s_link = after->s_link;
+    after->s_link = scn;
+    scn->s_index = after->s_index + 1;
+    if (elf->e_scn_n == scn) {
+	elf->e_scn_n = prev;
+    }
+    else if (elf->e_scn_n == after) {
+	elf->e_scn_n = scn;
+    }
+
+#if ENABLE_DEBUG
+    /*
+     * Check section indices
+     */
+    tmp = elf->e_scn_1;
+    elf_assert(tmp->s_index == 0);
+    while (tmp->s_link) {
+	elf_assert(tmp->s_link->s_index == tmp->s_index + 1);
+	tmp = tmp->s_link;
+    }
+#endif /* ENABLE_DEBUG */
+
+    return scn->s_index;
+}