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From: Szabolcs Nagy <nsz@sourceware.org> To: glibc-cvs@sourceware.org Subject: [glibc/arm/morello/main] aarch64: morello: add prctl with correct vararg handling Date: Wed, 26 Oct 2022 14:49:59 +0000 (GMT) [thread overview] Message-ID: <20221026144959.76D953851513@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=bf969db943228fa1d2bf21e0053687bbdd241500 commit bf969db943228fa1d2bf21e0053687bbdd241500 Author: Szabolcs Nagy <szabolcs.nagy@arm.com> Date: Wed Oct 26 10:19:30 2022 +0100 aarch64: morello: add prctl with correct vararg handling prctl is a variadic function and on morello args that were not passed cannot be accessed so the generic code does not work. Diff: --- sysdeps/unix/sysv/linux/aarch64/morello/prctl.S | 44 +++++++++++++++++++++++++ 1 file changed, 44 insertions(+) diff --git a/sysdeps/unix/sysv/linux/aarch64/morello/prctl.S b/sysdeps/unix/sysv/linux/aarch64/morello/prctl.S new file mode 100644 index 0000000000..f4e253af41 --- /dev/null +++ b/sysdeps/unix/sysv/linux/aarch64/morello/prctl.S @@ -0,0 +1,44 @@ +/* Copyright (C) 2022 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 + <https://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + +/* prctl (int option, ...) with 4 optional variadic arguments. */ + +ENTRY (__prctl) + mov x8, #__NR_prctl + cbz x9, L(skip_args) + gclen x10, c9 + ldr c1, [c9] + cmp x10, 16 + bls L(skip_args) + ldr c2, [c9,16] + cmp x10, 32 + bls L(skip_args) + ldr c3, [c9,32] + cmp x10, 48 + bls L(skip_args) + ldr c4, [c9,48] +L(skip_args): + svc 0x0 + cmn x0, #4095 + b.cs .Lsyscall_error + ret +PSEUDO_END (__prctl) +libc_hidden_def (__prctl) +weak_alias (__prctl, prctl)
next reply other threads:[~2022-10-26 14:49 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-10-26 14:49 Szabolcs Nagy [this message] 2022-10-26 15:14 Szabolcs Nagy 2022-10-27 13:53 Szabolcs Nagy 2022-11-23 14:43 Szabolcs Nagy
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