e028389dab
The VDSO_compat_* symbols added by vdso.lds.S for sigreturn32 are not
being tagged in the symbol table as FUNC symbols by ld.lld. As
a result, I see a SIGBUS error when running the LTP test
syscalls.rt_sigaction01.
This was fixed in https://reviews.llvm.org/D86263. Until we can update
to the latest version of llvm, let's drop the bottom bit for these
symbols in the VDSO_SYMBOL() macro so that the `vdso_trampoline + thumb`
functions properly.
Test: LTP test syscalls.rt_sigaction01
Bug: 172307050
Fixes: 71ca95b7e9 ("FROMLIST: arm64: vdso32: Allow ld.lld to properly link the VDSO")
Signed-off-by: Will McVicker <willmcvicker@google.com>
Change-Id: I24cf58ae62616a80c82653a7fc7dea93b33a3d0d
46 lines
1.2 KiB
C
46 lines
1.2 KiB
C
/*
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* Copyright (C) 2012 ARM Limited
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __ASM_VDSO_H
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#define __ASM_VDSO_H
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#ifdef __KERNEL__
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/*
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* Default link address for the vDSO.
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* Since we randomise the VDSO mapping, there's little point in trying
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* to prelink this.
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*/
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#define VDSO_LBASE 0x0
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#ifndef __ASSEMBLY__
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#include <generated/vdso-offsets.h>
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#ifdef CONFIG_COMPAT_VDSO
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#include <generated/vdso32-offsets.h>
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#endif
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#define VDSO_SYMBOL(base, name) \
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({ \
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(void *)((vdso_offset_##name & ~1UL) - VDSO_LBASE + \
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(unsigned long)(base)); \
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})
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#endif /* !__ASSEMBLY__ */
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#endif /* __KERNEL__ */
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#endif /* __ASM_VDSO_H */
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