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author | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
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committer | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
commit | 5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch) | |
tree | 4470480d904b65cf14ca524f96f79eca818c3eaf /sysdeps/unix/sysv/linux/i386/swapcontext.S | |
parent | 199fc19d3aaaf57944ef036e15904febe877fc93 (diff) | |
download | glibc-zack/build-layout-experiment.tar.gz glibc-zack/build-layout-experiment.tar.xz glibc-zack/build-layout-experiment.zip |
Prepare for radical source tree reorganization. zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage directory, REORG.TODO, except for files that will certainly still exist in their current form at top level when we're done (COPYING, COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which are moved to the new directory OldChangeLogs, instead), and the generated file INSTALL (which is just deleted; in the new order, there will be no generated files checked into version control).
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) |