From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 1791) id 2A5EF3858D32; Tue, 29 Nov 2022 21:21:26 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 2A5EF3858D32 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1669756886; bh=zgOdzerCJ85cMaKnV7yaPSQDBmEw7URu9BZCOuAVqfY=; h=From:To:Subject:Date:From; b=HDAAJCszkD7QpU0JmCLMKsOqeP93h4h+dVrrRO6wrwCkM5O68X8mWY+qJYRnJCtwK SNsKq8o/q8tlvGD+c7BkQFvRuZBvoil/kyq1envopztyzgkNs4oDrervF+wy/9JcPz N7XxafNtpVoa8Tjif6EPGXOEk0CKPj8lrQHERjGs= Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: Adhemerval Zanella To: glibc-cvs@sourceware.org Subject: [glibc/azanella/posix_spawn-clone3] s390x: Add the clone3 wrapper X-Act-Checkin: glibc X-Git-Author: Adhemerval Zanella X-Git-Refname: refs/heads/azanella/posix_spawn-clone3 X-Git-Oldrev: 4c005c682ff3646610fe6391fb144531bdf72639 X-Git-Newrev: 7316cb7835d14fa17b075e190cd87ce4f26f6ef1 Message-Id: <20221129212126.2A5EF3858D32@sourceware.org> Date: Tue, 29 Nov 2022 21:21:26 +0000 (GMT) List-Id: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=7316cb7835d14fa17b075e190cd87ce4f26f6ef1 commit 7316cb7835d14fa17b075e190cd87ce4f26f6ef1 Author: Adhemerval Zanella Date: Tue Sep 27 17:00:27 2022 -0300 s390x: Add the clone3 wrapper It follows the internal signature: extern int clone3 (struct clone_args *__cl_args, size_t __size, int (*__func) (void *__arg), void *__arg); Checked on s390x-linux-gnu. Diff: --- sysdeps/unix/sysv/linux/s390/s390-64/clone3.S | 81 +++++++++++++++++++++++++++ sysdeps/unix/sysv/linux/s390/sysdep.h | 1 + 2 files changed, 82 insertions(+) diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/clone3.S b/sysdeps/unix/sysv/linux/s390/s390-64/clone3.S new file mode 100644 index 0000000000..873d9a74b7 --- /dev/null +++ b/sysdeps/unix/sysv/linux/s390/s390-64/clone3.S @@ -0,0 +1,81 @@ +/* The clone3 syscall wrapper. Linux/s390x version. + 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 + . */ + +#include +#define _ERRNO_H 1 +#include + +/* The userland implementation is: + int clone3 (struct clone_args *cl_args, size_t size, + int (*func)(void *arg), void *arg); + + the kernel entry is: + int clone3 (struct clone_args *cl_args, size_t size); + + The parameters are passed in registers from userland: + r2: cl_args + r3: size + r4: func + r5: arg */ + + .text +ENTRY(__clone3) + stg %r6, 48(%r15) + + /* Sanity check args. */ + ltgr %r2, %r2 + je error + ltgr %r6, %r4 + je error + + /* Do the system call, the kernel expects: + r1: system call number + r2: cl_args + r3: size */ + lghi %r1, SYS_ify(clone3) + svc 0 + ltgr %r2,%r2 /* check return code */ + jz thread_start + lg %r6, 48(%r15) + jgm SYSCALL_ERROR_LABEL + br %r14 +error: + lghi %r2,-EINVAL + jg SYSCALL_ERROR_LABEL +PSEUDO_END (__clone3) + + .align 4 + .type thread_start, %function +thread_start: + cfi_startproc + /* Mark r14 as undefined in order to stop unwinding here. */ + cfi_undefined (r14) + + /* func is in gpr 6, arg in gpr 5. */ + lgr %r2, %r5 + aghi %r15, -160 + xc 0(8,%r15),0(%r15) + basr %r14, %r6 + + DO_CALL (exit, 1) + cfi_endproc + .size thread_start, .-thread_start + +libc_hidden_def (__clone3) +weak_alias (__clone3, clone3) diff --git a/sysdeps/unix/sysv/linux/s390/sysdep.h b/sysdeps/unix/sysv/linux/s390/sysdep.h index 930d7efe03..366c797ef1 100644 --- a/sysdeps/unix/sysv/linux/s390/sysdep.h +++ b/sysdeps/unix/sysv/linux/s390/sysdep.h @@ -72,6 +72,7 @@ #ifdef __s390x__ #define HAVE_CLOCK_GETRES64_VSYSCALL "__kernel_clock_getres" #define HAVE_CLOCK_GETTIME64_VSYSCALL "__kernel_clock_gettime" +#define HAVE_CLONE3_WRAPPER 1 #else #define HAVE_CLOCK_GETRES_VSYSCALL "__kernel_clock_getres" #define HAVE_CLOCK_GETTIME_VSYSCALL "__kernel_clock_gettime"