1 files changed, 119 insertions, 0 deletions
diff --git a/lib/x.remscn.c b/lib/x.remscn.c
new file mode 100644
index 0000000..d04816e
--- /dev/null
+++ b/lib/x.remscn.c
@@ -0,0 +1,119 @@
+/*
+x.remscn.c - implementation of the elfx_remscn(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.remscn.c,v 1.15 2008/05/23 08:15:35 michael Exp $";
+#endif /* lint */
+
+size_t
+elfx_remscn(Elf *elf, Elf_Scn *scn) {
+    Elf_Scn *pscn;
+    Scn_Data *sd;
+    Scn_Data *tmp;
+    size_t index;
+
+    if (!elf || !scn) {
+	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(elf->e_ehdr);
+    if (scn->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;
+    }
+
+    /*
+     * Find previous section.
+     */
+    for (pscn = elf->e_scn_1; pscn->s_link; pscn = pscn->s_link) {
+	if (pscn->s_link == scn) {
+	    break;
+	}
+    }
+    if (pscn->s_link != scn) {
+	seterr(ERROR_ELFSCNMISMATCH);
+	return SHN_UNDEF;
+    }
+
+    /*
+     * Unlink section.
+     */
+    if (elf->e_scn_n == scn) {
+	elf->e_scn_n = pscn;
+    }
+    pscn->s_link = scn->s_link;
+    index = scn->s_index;
+
+    /*
+     * Free section descriptor and data.
+     */
+    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 && sd->sd_memdata) {
+	    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 && sd->sd_memdata) {
+	    free(sd->sd_memdata);
+	}
+	if (sd->sd_freeme) {
+	    free(sd);
+	}
+    }
+    if (scn->s_freeme) {
+	elf_assert(scn->s_index > 0);
+	free(scn);
+    }
+
+    /*
+     * Adjust section indices.
+     */
+    for (scn = pscn->s_link; scn; scn = scn->s_link) {
+	elf_assert(scn->s_index > index);
+	scn->s_index--;
+    }
+
+    /*
+     * Adjust section count in ELF header
+     */
+    if (_elf_update_shnum(elf, elf->e_scn_n->s_index + 1)) {
+	return SHN_UNDEF;
+    }
+    return index;
+}