diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/i386/clone.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/clone.S | 124 |
1 files changed, 0 insertions, 124 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/clone.S b/sysdeps/unix/sysv/linux/i386/clone.S deleted file mode 100644 index a4ba3e20ff..0000000000 --- a/sysdeps/unix/sysv/linux/i386/clone.S +++ /dev/null @@ -1,124 +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) - - 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> -#include <asm-syntax.h> - -/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg, - pid_t *ptid, struct user_desc *tls, pid_t *ctid); */ - -#define PARMS 4 /* no space for saved regs */ -#define FUNC PARMS -#define STACK FUNC+4 -#define FLAGS STACK+4 -#define ARG FLAGS+4 -#define PTID ARG+4 -#define TLS PTID+4 -#define CTID TLS+4 - -#define __NR_clone 120 -#define SYS_clone 120 - -#define CLONE_VM 0x00000100 - - .text -ENTRY (__clone) - /* Sanity check arguments. */ - movl $-EINVAL,%eax - movl FUNC(%esp),%ecx /* no NULL function pointers */ - testl %ecx,%ecx - jz SYSCALL_ERROR_LABEL - movl STACK(%esp),%ecx /* no NULL stack pointers */ - testl %ecx,%ecx - jz SYSCALL_ERROR_LABEL - - /* Insert the argument onto the new stack. Make sure the new - thread is started with an alignment of (mod 16). */ - andl $0xfffffff0, %ecx - subl $28,%ecx - movl ARG(%esp),%eax /* no negative argument counts */ - movl %eax,12(%ecx) - - /* Save the function pointer as the zeroth argument. - It will be popped off in the child in the ebx frobbing below. */ - movl FUNC(%esp),%eax - movl %eax,8(%ecx) - /* Don't leak any information. */ - movl $0,4(%ecx) - - /* Do the system call */ - pushl %ebx - cfi_adjust_cfa_offset (4) - pushl %esi - cfi_adjust_cfa_offset (4) - pushl %edi - cfi_adjust_cfa_offset (4) - - movl TLS+12(%esp),%esi - cfi_rel_offset (esi, 4) - movl PTID+12(%esp),%edx - movl FLAGS+12(%esp),%ebx - cfi_rel_offset (ebx, 8) - movl CTID+12(%esp),%edi - cfi_rel_offset (edi, 0) - movl $SYS_ify(clone),%eax - - /* Remember the flag value. */ - movl %ebx, (%ecx) - - /* End FDE now, because in the child the unwind info will be - wrong. */ - cfi_endproc - - int $0x80 - popl %edi - popl %esi - popl %ebx - - test %eax,%eax - jl SYSCALL_ERROR_LABEL - jz L(thread_start) - - ret - -L(thread_start): - cfi_startproc; - /* Clearing frame pointer is insufficient, use CFI. */ - cfi_undefined (eip); - /* Note: %esi is zero. */ - movl %esi,%ebp /* terminate the stack frame */ - call *%ebx -#ifdef PIC - call L(here) -L(here): - popl %ebx - addl $_GLOBAL_OFFSET_TABLE_+[.-L(here)], %ebx -#endif - movl %eax, %ebx - movl $SYS_ify(exit), %eax - ENTER_KERNEL - -PSEUDO_END (__clone) - -libc_hidden_def (__clone) -weak_alias (__clone, clone) |