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Diffstat (limited to 'REORG.TODO/csu/abi-note.S')
| -rw-r--r-- | REORG.TODO/csu/abi-note.S | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/REORG.TODO/csu/abi-note.S b/REORG.TODO/csu/abi-note.S new file mode 100644 index 0000000000..a231296148 --- /dev/null +++ b/REORG.TODO/csu/abi-note.S @@ -0,0 +1,72 @@ +/* Special .init and .fini section support. + Copyright (C) 1997-2017 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. + + In addition to the permissions in the GNU Lesser General Public + License, the Free Software Foundation gives you unlimited + permission to link the compiled version of this file with other + programs, and to distribute those programs without any restriction + coming from the use of this file. (The Lesser General Public + License restrictions do apply in other respects; for example, they + cover modification of the file, and distribution when not linked + into another program.) + + 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/>. */ + +/* Define an ELF note identifying the operating-system ABI that the + executable was created for. The ELF note information identifies a + particular OS or coordinated development effort within which the + ELF header's e_machine value plus (for dynamically linked programs) + the PT_INTERP dynamic linker name and DT_NEEDED shared library + names fully identify the runtime environment required by an + executable. + + The general format of ELF notes is as follows. + Offsets and lengths are bytes or (parenthetical references) to the + values in other fields. + +offset length contents +0 4 length of name +4 4 length of data +8 4 note type +12 (0) vendor name + - null-terminated ASCII string, padded to 4-byte alignment +12+(0) (4) note data, + + The GNU project and cooperating development efforts (including the + Linux community) use note type 1 and a vendor name string of "GNU" + for a note descriptor that indicates ABI requirements. The note data + is four 32-bit words. The first of these is an operating system + number (0=Linux, 1=Hurd, 2=Solaris, ...) and the remaining three + identify the earliest release of that OS that supports this ABI. + See abi-tags (top level) for details. */ + +#include <config.h> +#include <abi-tag.h> /* OS-specific ABI tag value */ + +/* The linker (GNU ld 2.8 and later) recognizes an allocated section whose + name begins with `.note' and creates a PT_NOTE program header entry + pointing at it. */ + + .section ".note.ABI-tag", "a" + .p2align 2 + .long 1f - 0f /* name length */ + .long 3f - 2f /* data length */ + .long 1 /* note type */ +0: .asciz "GNU" /* vendor name */ +1: .p2align 2 +2: .long __ABI_TAG_OS /* note data: the ABI tag */ + .long __ABI_TAG_VERSION +3: .p2align 2 /* pad out section */ |