diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/i386/swapcontext.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/swapcontext.S | 109 |
1 files changed, 0 insertions, 109 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/swapcontext.S b/sysdeps/unix/sysv/linux/i386/swapcontext.S deleted file mode 100644 index cfdb1f0ad1..0000000000 --- a/sysdeps/unix/sysv/linux/i386/swapcontext.S +++ /dev/null @@ -1,109 +0,0 @@ -/* Save current context and install the given one. - Copyright (C) 2001-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@redhat.com>, 2001. - - 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/>. */ - -#include <sysdep.h> - -#include "ucontext_i.h" - - -ENTRY(__swapcontext) - /* Load address of the context data structure we save in. */ - movl 4(%esp), %eax - - /* Return value of swapcontext. EAX is the only register whose - value is not preserved. */ - movl $0, oEAX(%eax) - - /* Save the 32-bit register values and the return address. */ - movl %ecx, oECX(%eax) - movl %edx, oEDX(%eax) - movl %edi, oEDI(%eax) - movl %esi, oESI(%eax) - movl %ebp, oEBP(%eax) - movl (%esp), %ecx - movl %ecx, oEIP(%eax) - leal 4(%esp), %ecx - movl %ecx, oESP(%eax) - movl %ebx, oEBX(%eax) - - /* Save the FS segment register. */ - xorl %edx, %edx - movw %fs, %dx - movl %edx, oFS(%eax) - - /* We have separate floating-point register content memory on the - stack. We use the __fpregs_mem block in the context. Set the - links up correctly. */ - leal oFPREGSMEM(%eax), %ecx - movl %ecx, oFPREGS(%eax) - /* Save the floating-point context. */ - fnstenv (%ecx) - - /* Load address of the context data structure we have to load. */ - movl 8(%esp), %ecx - - /* Save the current signal mask and install the new one. */ - pushl %ebx - leal oSIGMASK(%eax), %edx - leal oSIGMASK(%ecx), %ecx - movl $SIG_SETMASK, %ebx - movl $__NR_sigprocmask, %eax - ENTER_KERNEL - popl %ebx - cmpl $-4095, %eax /* Check %eax for error. */ - jae SYSCALL_ERROR_LABEL /* Jump to error handler if error. */ - - /* EAX was modified, reload it. */ - movl 8(%esp), %eax - - /* Restore the floating-point context. Not the registers, only the - rest. */ - movl oFPREGS(%eax), %ecx - fldenv (%ecx) - - /* Restore the FS segment register. We don't touch the GS register - since it is used for threads. */ - movl oFS(%eax), %edx - movw %dx, %fs - - /* Fetch the address to return to. */ - movl oEIP(%eax), %ecx - - /* Load the new stack pointer. */ - movl oESP(%eax), %esp - - /* Push the return address on the new stack so we can return there. */ - pushl %ecx - - /* Load the values of all the 32-bit registers (except ESP). - Since we are loading from EAX, it must be last. */ - movl oEDI(%eax), %edi - movl oESI(%eax), %esi - movl oEBP(%eax), %ebp - movl oEBX(%eax), %ebx - movl oEDX(%eax), %edx - movl oECX(%eax), %ecx - movl oEAX(%eax), %eax - - /* The following 'ret' will pop the address of the code and jump - to it. */ - ret -PSEUDO_END(__swapcontext) - -weak_alias (__swapcontext, swapcontext) |