diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/alpha/clone.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/alpha/clone.S | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/sysdeps/unix/sysv/linux/alpha/clone.S b/sysdeps/unix/sysv/linux/alpha/clone.S deleted file mode 100644 index 20ae361c6b..0000000000 --- a/sysdeps/unix/sysv/linux/alpha/clone.S +++ /dev/null @@ -1,120 +0,0 @@ -/* Copyright (C) 1996-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Richard Henderson <rth@tamu.edu>, 1996. - - 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 - <http://www.gnu.org/licenses/>. */ - -/* clone() is even more special than fork() as it mucks with stacks - and invokes a function in the right context after its all over. */ - -#include <sysdep.h> -#define _ERRNO_H 1 -#include <bits/errno.h> - -#define CLONE_VM 0x00000100 - -/* int clone(int (*fn)(void *arg), void *child_stack, int flags, - void *arg, pid_t *ptid, void *tls, pid_t *ctid); - - Note that everything past ARG is technically optional, based - on FLAGS, and that CTID is arg 7, and thus is on the stack. - However, since a load from top-of-stack better be legal always, - we don't bother checking FLAGS. */ - - .text - .align 4 - .globl __clone - .ent __clone - .usepv __clone, USEPV_PROF - - cfi_startproc -__clone: -#ifdef PROF - ldgp gp,0(pv) - lda AT, _mcount - jsr AT, (AT), _mcount -#endif - - /* Sanity check arguments. */ - ldiq v0, EINVAL - beq a0, SYSCALL_ERROR_LABEL /* no NULL function pointers */ - beq a1, SYSCALL_ERROR_LABEL /* no NULL stack pointers */ - - /* Save the fn ptr and arg on the new stack. */ - subq a1, 32, a1 - stq a0, 0(a1) - stq a3, 8(a1) - stq a2, 16(a1) - - /* The syscall is of the form clone(flags, usp, ptid, ctid, tls). - Shift the flags, ptid, ctid, tls arguments into place; the - child_stack argument is already correct. */ - mov a2, a0 - mov a4, a2 - ldq a3, 0(sp) - mov a5, a4 - - /* Do the system call. */ - ldiq v0, __NR_clone - call_pal PAL_callsys - - bne a3, SYSCALL_ERROR_LABEL - beq v0, thread_start - - /* Successful return from the parent. */ - ret - -PSEUDO_END(__clone) - cfi_endproc - -/* Load up the arguments to the function. Put this block of code in - its own function so that we can terminate the stack trace with our - debug info. */ - - .align 4 - .ent thread_start - cfi_startproc -thread_start: - mov 0, fp - cfi_def_cfa_register(fp) - cfi_undefined(ra) - - /* Load up the arguments. */ - ldq pv, 0(sp) - ldq a0, 8(sp) - addq sp, 32, sp - - /* Call the user's function. */ - jsr ra, (pv) - ldgp gp, 0(ra) - - /* Call _exit rather than doing it inline for breakpoint purposes. */ - mov v0, a0 -#ifdef PIC - bsr ra, HIDDEN_JUMPTARGET(_exit) !samegp -#else - jsr ra, HIDDEN_JUMPTARGET(_exit) -#endif - - /* Die horribly. */ - .align 4 - halt - - .align 4 - cfi_endproc - .end thread_start - -libc_hidden_def (__clone) -weak_alias (__clone, clone) |