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30891f35fa
We stopped adding "Contributed by" or similar lines in sources in 2012 in favour of git logs and keeping the Contributors section of the glibc manual up to date. Removing these lines makes the license header a bit more consistent across files and also removes the possibility of error in attribution when license blocks or files are copied across since the contributed-by lines don't actually reflect reality in those cases. Move all "Contributed by" and similar lines (Written by, Test by, etc.) into a new file CONTRIBUTED-BY to retain record of these contributions. These contributors are also mentioned in manual/contrib.texi, so we just maintain this additional record as a courtesy to the earlier developers. The following scripts were used to filter a list of files to edit in place and to clean up the CONTRIBUTED-BY file respectively. These were not added to the glibc sources because they're not expected to be of any use in future given that this is a one time task: https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02 Reviewed-by: Carlos O'Donell <carlos@redhat.com>
84 lines
2.3 KiB
ArmAsm
84 lines
2.3 KiB
ArmAsm
/* clone() implementation for Nios II.
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Copyright (C) 2008-2021 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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#define _ERRNO_H 1
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#include <bits/errno.h>
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#include <tcb-offsets.h>
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/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg,
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void *parent_tidptr, void *tls, void *child_tidptr) */
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.text
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ENTRY(__clone)
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/* Sanity check arguments. */
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movi r2, EINVAL
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/* No NULL function pointers. */
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beq r4, zero, SYSCALL_ERROR_LABEL
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/* No NULL stack pointers. */
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beq r5, zero, SYSCALL_ERROR_LABEL
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subi r5, r5, 8 /* Reserve argument save space. */
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stw r4, 4(r5) /* Save function pointer. */
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stw r7, 0(r5) /* Save argument pointer. */
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/* Load arguments. */
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mov r4, r6
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ldw r6, 0(sp)
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ldw r7, 8(sp)
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ldw r8, 4(sp)
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/* Do the system call. */
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movi r2, SYS_ify (clone)
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/* End FDE now, because in the child the unwind info will be
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wrong. */
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cfi_endproc
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trap
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/* Check for errors. */
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bne r7, zero, SYSCALL_ERROR_LABEL
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/* See if we're on the newly created thread. */
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beq r2, zero, thread_start
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/* Successful return from the parent */
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ret
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thread_start:
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cfi_startproc
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cfi_undefined (ra)
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ldw r5, 4(sp) /* Function pointer. */
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ldw r4, 0(sp) /* Argument pointer. */
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addi sp, sp, 8
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/* Call the user's function. */
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callr r5
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/* exit with the result. */
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movi r2, SYS_ify (exit)
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trap
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cfi_endproc
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cfi_startproc
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PSEUDO_END (__clone)
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libc_hidden_def (__clone)
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weak_alias (__clone, clone)
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