71 lines
2.5 KiB
Diff
71 lines
2.5 KiB
Diff
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Subject: libhugetlbfs.ppc64le.step2
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From: Michel Normand <normand@linux.vnet.ibm.com>
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Need to create the elf64lppc.c supposed to be a soft link of elf64ppc.c
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But do not know hwo to do that via a patch <= TODO
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Signed-off-by: Michel Normand <normand@linux.vnet.ibm.com>
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---
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elf64lppc.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
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1 file changed, 54 insertions(+)
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Index: libhugetlbfs-2.16/elf64lppc.c
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===================================================================
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--- /dev/null
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+++ libhugetlbfs-2.16/elf64lppc.c
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@@ -0,0 +1,54 @@
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+/*
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+ * libhugetlbfs - Easy use of Linux hugepages
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+ * Copyright (C) 2008 Adam Litke, IBM Corporation.
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+ *
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+ * This library is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU Lesser General Public License
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+ * as published by the Free Software Foundation; either version 2.1 of
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+ * the License, or (at your option) any later version.
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+ *
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+ * This library is distributed in the hope that it will be useful, but
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+ * WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ * Lesser General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU Lesser General Public
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+ * License along with this library; if not, write to the Free Software
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+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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+ */
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+
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+#include <elf.h>
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+#include <link.h>
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+
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+#include "libhugetlbfs_internal.h"
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+
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+/*
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+ * The powerpc 64-bit ELF ABI defines the location and size of the plt as
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+ * follows (see the ELF ABI and powerpc64 supplement for details):
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+ *
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+ * Location: (data segment p_vaddr) + (data segment p_filesz)
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+ * Size: (dynamic symbol table DT_PTRELSZ entry) + 24
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+ *
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+ * plt entries have likely been initialized when the libhugetlbfs remapping
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+ * code runs, we must copy these entries when preparing the data segment. Tell
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+ * the arch-independent code how many bytes to copy.
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+ */
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+ElfW(Word) plt_extrasz(ElfW(Dyn) *dyntab)
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+{
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+ int i;
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+ ElfW(Word) pltrelsz = 0;
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+
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+ /* Find the needed information in the dynamic section */
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+ for (i = 0; dyntab[i].d_tag != DT_NULL; i++)
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+ if (dyntab[i].d_tag == DT_PLTRELSZ)
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+ pltrelsz = dyntab[i].d_un.d_val;
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+
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+ /* pltrelsz indicates the size of all plt entries used to cache
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+ * symbol lookups, but does not include the reserved entry at PLT[0].
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+ * 24 bytes is the ABI-defined size of a plt entry.
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+ */
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+ if (pltrelsz)
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+ return pltrelsz + 24;
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+ else
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+ return 0;
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+}
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