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807849965b
The linker just concatenates the .init and .fini sections which results in the complete _init and _fini functions. If needed the linker adds padding bytes due to an alignment. GNU ld is adding NOPs, which is fine. But e.g. mold is adding traps which results in broken _init and _fini functions. Thus this patch removes the alignment in .init and .fini sections in crtn.S files. We keep the 4 byte function alignment in crti.S files. As the assembler now also outputs the start of _init and _fini functions as multiples of 4 byte, it perhaps has to fill it. Although GNU as is using NOPs here, to be sure, we just keep the alignment with 0x07 (=NOPs) at the end of crti.S. In order to avoid an obvious NOP slide in _fini, this patch also uses an lg instead of lgr instruction. Then the emitted instructions needs a multiple of 4 bytes.
48 lines
2.0 KiB
ArmAsm
48 lines
2.0 KiB
ArmAsm
/* Special .init and .fini section support for 64 bit S/390.
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Copyright (C) 2001-2023 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 and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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In addition to the permissions in the GNU Lesser 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 GNU Lesser 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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Note that people who make modified versions of this file are not
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obligated to grant this special exception for their modified
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versions; it is their choice whether to do so. The GNU Lesser
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General Public License gives permission to release a modified
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version without this exception; this exception also makes it
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possible to release a modified version which carries forward this
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exception.
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The GNU C Library is distributed in the hope that it will be useful,
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but 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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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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/* crtn.S puts function epilogues in the .init and .fini sections
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corresponding to the prologues in crti.S. */
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.section .init
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lg %r4,272(%r15)
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lmg %r6,%r15,208(%r15)
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br %r4
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.section .fini
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lg %r4,272(%r15)
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lmg %r6,%r15,208(%r15)
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br %r4
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