diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/x86_64/setcontext.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/x86_64/setcontext.S | 102 |
1 files changed, 0 insertions, 102 deletions
diff --git a/sysdeps/unix/sysv/linux/x86_64/setcontext.S b/sysdeps/unix/sysv/linux/x86_64/setcontext.S deleted file mode 100644 index f41e7d47a2..0000000000 --- a/sysdeps/unix/sysv/linux/x86_64/setcontext.S +++ /dev/null @@ -1,102 +0,0 @@ -/* Install given context. - Copyright (C) 2002-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Andreas Jaeger <aj@suse.de>, 2002. - - 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" - - -/* int __setcontext (const ucontext_t *ucp) - - Restores the machine context in UCP and thereby resumes execution - in that context. - - This implementation is intended to be used for *synchronous* context - switches only. Therefore, it does not have to restore anything - other than the PRESERVED state. */ - -ENTRY(__setcontext) - /* Save argument since syscall will destroy it. */ - pushq %rdi - cfi_adjust_cfa_offset(8) - - /* Set the signal mask with - rt_sigprocmask (SIG_SETMASK, mask, NULL, _NSIG/8). */ - leaq oSIGMASK(%rdi), %rsi - xorl %edx, %edx - movl $SIG_SETMASK, %edi - movl $_NSIG8,%r10d - movl $__NR_rt_sigprocmask, %eax - syscall - popq %rdi /* Reload %rdi, adjust stack. */ - cfi_adjust_cfa_offset(-8) - cmpq $-4095, %rax /* Check %rax for error. */ - jae SYSCALL_ERROR_LABEL /* Jump to error handler if error. */ - - /* Restore the floating-point context. Not the registers, only the - rest. */ - movq oFPREGS(%rdi), %rcx - fldenv (%rcx) - ldmxcsr oMXCSR(%rdi) - - - /* Load the new stack pointer, the preserved registers and - registers used for passing args. */ - cfi_def_cfa(%rdi, 0) - cfi_offset(%rbx,oRBX) - cfi_offset(%rbp,oRBP) - cfi_offset(%r12,oR12) - cfi_offset(%r13,oR13) - cfi_offset(%r14,oR14) - cfi_offset(%r15,oR15) - cfi_offset(%rsp,oRSP) - cfi_offset(%rip,oRIP) - - movq oRSP(%rdi), %rsp - movq oRBX(%rdi), %rbx - movq oRBP(%rdi), %rbp - movq oR12(%rdi), %r12 - movq oR13(%rdi), %r13 - movq oR14(%rdi), %r14 - movq oR15(%rdi), %r15 - - /* The following ret should return to the address set with - getcontext. Therefore push the address on the stack. */ - movq oRIP(%rdi), %rcx - pushq %rcx - - movq oRSI(%rdi), %rsi - movq oRDX(%rdi), %rdx - movq oRCX(%rdi), %rcx - movq oR8(%rdi), %r8 - movq oR9(%rdi), %r9 - - /* Setup finally %rdi. */ - movq oRDI(%rdi), %rdi - - /* End FDE here, we fall into another context. */ - cfi_endproc - cfi_startproc - - /* Clear rax to indicate success. */ - xorl %eax, %eax - ret -PSEUDO_END(__setcontext) - -weak_alias (__setcontext, setcontext) |