581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
71 lines
2.5 KiB
ArmAsm
71 lines
2.5 KiB
ArmAsm
/* Copyright (C) 2000-2022 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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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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/* clone is even more special than fork as it mucks with stacks
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and invokes a function in the right context after its all over. */
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#include <sysdep.h>
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#include <tls.h>
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#define _ERRNO_H 1
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#include <bits/errno.h>
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/* int __clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg,
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pid_t *parent_tid, void *tls, pid_t *child_tid); */
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/* sys_clone (void *child_stack, unsigned long flags,
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pid_t *parent_tid, pid_t *child_tid, void *tls); */
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.text
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ENTRY(__clone)
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st %r6,24(%r15) /* store %r6 to save area */
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cfi_offset (%r6, -72)
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ltr %r1,%r2 /* check fn and move to %r1 */
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jz error /* no NULL function pointers */
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lhi %r0,-8 /* Align the child_stack to a ... */
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nr %r3,%r0 /* double word boundary and ... */
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jz error /* avoid NULL stack pointers. */
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lr %r0,%r5 /* move *arg out of the way */
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lr %r2,%r3 /* move child_stack to %r2 */
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lr %r3,%r4 /* move flags to %r3 */
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lr %r4,%r6 /* move parent_tid to %r4 */
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l %r5,100(%r15) /* load child_tid from stack */
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l %r6,96(%r15) /* load tls from stack */
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svc SYS_ify(clone)
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ltr %r2,%r2 /* check return code */
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jz thread_start
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l %r6,24(%r15) /* restore %r6 */
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jm SYSCALL_ERROR_LABEL
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br %r14
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error:
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lhi %r2,-EINVAL
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j SYSCALL_ERROR_LABEL
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PSEUDO_END (__clone)
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thread_start:
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cfi_startproc
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/* Mark r14 as undefined in order to stop unwinding here! */
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cfi_undefined (r14)
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/* fn is in gpr 1, arg in gpr 0 */
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lr %r2,%r0 /* set first parameter to void *arg */
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ahi %r15,-96 /* make room on the stack for the save area */
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xc 0(4,%r15),0(%r15)
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basr %r14,%r1 /* jump to fn */
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DO_CALL (exit, 1)
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cfi_endproc
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libc_hidden_def (__clone)
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weak_alias (__clone, clone)
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