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[RFC PATCH 02/11] elf: add macro to define note section for LibOS
This patch defines macro to define note section for LibOS.
Later patches will use those macros.
Signed-off-by: Isaku Yamahata <isaku.yamahata@gmail.com>
---
elf/libos.h | 84 +++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 84 insertions(+)
create mode 100644 elf/libos.h
diff --git a/elf/libos.h b/elf/libos.h
new file mode 100644
index 0000000000..0610c212ff
--- /dev/null
+++ b/elf/libos.h
@@ -0,0 +1,84 @@
+/* Copyright (C) 2019 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _LIBOS_H
+#define _LIBOS_H 1
+
+#include <link.h>
+
+#define STRINGIFY(name) STRINGIFY_1(name)
+#define STRINGIFY_1(name) #name
+
+#define NT_LIBOS 0x4f62694c /* "LibO" in little endian */
+#define ELF_NOTE_LIBOS "LibOS"
+#define LIBOS_NOTE_VERSION 1
+#define LIBOS_NOTE_FUNCTION 2
+#define LIBOS_NOTE_VARIABLE 3
+
+struct libos_note_desc {
+ ElfW(Word) name_sz;
+ ElfW(Word) type;
+ ElfW(Addr) ptr;
+ ElfW(Word) sz;
+ /* name */
+};
+
+#if __SIZEOF_PTRDIFF_T__ == 8
+#define LIBOS_NOTES(n_name, type, ptr, sz, name) \
+ __asm__ ( \
+ " .pushsection .note.libos." n_name ",\"a\",@note\n" \
+ " .balign 8\n" \
+ " .long 1f - 0f\n" /* name length */ \
+ " .long 5f - 2f\n" /* desc size */ \
+ " .long " STRINGIFY(NT_LIBOS) "\n" /* note type*/ \
+ "0: .asciz \"libos\"\n" \
+ "1:\n" \
+ " .balign 8\n" \
+ "2:\n" \
+ " .long 4f - 3f\n" \
+ " .long " STRINGIFY(type) "\n" \
+ " .quad " STRINGIFY(ptr) "\n" \
+ " .quad " STRINGIFY(sz) "\n" \
+ "3: .asciz \"" name "\"\n" \
+ "4:\n" \
+ " .balign 8\n" \
+ "5:\n" \
+ " .popsection\n")
+#elif __SIZEOF_PTRDIFF_T__ == 4
+#define LIBOS_NOTES(n_name, type, ptr, sz, name) \
+ __asm__ ( \
+ " .pushsection .note.libos." n_name ",\"a\",@note\n" \
+ " .balign 4\n" \
+ " .long 1f - 0f\n" /* name length */ \
+ " .long 5f - 2f\n" /* desc size */ \
+ " .long " STRINGIFY(NT_LIBOS) "\n" /* note type*/ \
+ "0: .asciz \"libos\"\n" \
+ "1:\n" \
+ " .balign 4\n" \
+ "2:\n" \
+ " .long 4f - 3f\n" \
+ " .long " STRINGIFY(type) "\n" \
+ " .long " STRINGIFY(ptr) "\n" \
+ " .long " STRINGIFY(sz) "\n" \
+ "3: .asciz \"" name "\"\n" \
+ "4:\n" \
+ " .balign 4\n" \
+ "5:\n" \
+ " .popsection\n")
+#endif
+
+#endif /* libos.h */
--
2.17.1