1997-04-30 17:51:34 +02:00
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/* Special .init and .fini section support.
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Copyright (C) 1997 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it
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and/or modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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In addition to the permissions in the GNU Library General Public
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License, the Free Software Foundation gives you unlimited
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permission to link the compiled version of this file with other
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programs, and to distribute those programs without any restriction
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coming from the use of this file. (The Library General Public
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License restrictions do apply in other respects; for example, they
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cover modification of the file, and distribution when not linked
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into another program.)
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The GNU C Library is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <sysdep.h>
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/* The basic layout of note sections is specified by the ELF format. */
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#define ELF_NOTE_BEGIN(sectname, sectflags, type, name) \
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.section sectname, sectflags; \
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1997-05-07 17:31:21 +02:00
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.align 4; /* Notes are 4-byte aligned. */ \
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1997-04-30 17:51:34 +02:00
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.long 1f - 0f; /* 32-bit word: length of name field */ \
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.long 3f - 2f; /* 32-bit word: length of desc field */ \
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.long (type); /* 32-bit word: vendor-defined type field */ \
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0: .asciz name; /* null-terminated string, any length: name */\
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1997-05-07 17:31:21 +02:00
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1: .align 4; /* Name data padded to 4-byte alignment. */ \
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1997-04-30 17:51:34 +02:00
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2: /* Here follows the "note descriptor" data, whose format \
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is not specified by ELF. The vendor name and type field \
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indicate what sort of data is found here. */
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#define ELF_NOTE_END \
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1997-05-07 17:31:21 +02:00
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3: .align 4 /* Pad to 4-byte align the next note. */
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1997-04-30 17:51:34 +02:00
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/* The linker (GNU ld 2.8 and later) recognize an allocated section whose
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name begins with `.note' and creates a PT_NOTE program header entry
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pointing at it.
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Such a program header is the canonical way (at least in the free OS
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community) to identify the OS environment ABI that the executable was
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created for. The ELF note information identifies a particular OS or
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coordinated development effort within which the ELF header's e_machine
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value plus (for dynamically linked programs) the PT_INTERP dynamic
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linker name and DT_NEEDED shared library names fully identify the
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runtime environment required by an executable.
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The GNU project and cooperating development efforts (including the Linux
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community) use a vendor name string of "GNU", and a note type field with
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value 1 for a note descriptor that indicates ABI requirements. */
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#include <abi-tag.h> /* OS-specific ABI tag value */
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ELF_NOTE_BEGIN(".note.ABI-tag", "a", 1, "GNU")
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.long ABI_TAG
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ELF_NOTE_END
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