| /* Save current context and jump to a new context. |
| Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| 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, write to the Free |
| Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA |
| 02110-1301 USA. */ |
| |
| #include <sysdep.h> |
| #include <rtld-global-offsets.h> |
| #include <shlib-compat.h> |
| #include <kernel-features.h> |
| |
| #define __ASSEMBLY__ |
| #include <asm/ptrace.h> |
| #include "ucontext_i.h" |
| |
| #define __CONTEXT_FUNC_NAME __swapcontext |
| #define __CONTEXT_ENABLE_FPRS 1 |
| #define __CONTEXT_ENABLE_VRS 1 |
| |
| /* Size of ucontext in GLIBC_2.3.4 and later. */ |
| #define _UC_SIZE_2_3_4 1184 |
| |
| #ifdef __ASSUME_SWAPCONTEXT_SYSCALL |
| .section ".text"; |
| ENTRY (__swapcontext) |
| li r5,_UC_SIZE_2_3_4; |
| DO_CALL (SYS_ify (swapcontext)); |
| bso- cr0,1f |
| /* the kernel does not set the return code for the success case */ |
| li r3,0 |
| blr |
| 1: |
| b __syscall_error@local |
| END(__swapcontext) |
| #else |
| # include "swapcontext-common.S" |
| #endif |
| |
| versioned_symbol (libc, __swapcontext, swapcontext, GLIBC_2_3_4) |
| |
| #if SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4) |
| |
| compat_text_section |
| |
| # undef __CONTEXT_FUNC_NAME |
| # define __CONTEXT_FUNC_NAME __novec_swapcontext |
| # undef __CONTEXT_ENABLE_VRS |
| |
| # include "swapcontext-common.S" |
| |
| .previous |
| |
| compat_symbol (libc, __novec_swapcontext, swapcontext, GLIBC_2_3_3) |
| |
| #endif |
| |
| #if SHLIB_COMPAT (libc, GLIBC_2_1, GLIBC_2_3_3) |
| |
| # define _ERRNO_H 1 |
| # include <bits/errno.h> |
| |
| compat_text_section |
| ENTRY (__swapcontext_stub) |
| li r3,ENOSYS |
| b __syscall_error@local |
| END (__swapcontext_stub) |
| .previous |
| |
| compat_symbol (libc, __swapcontext_stub, swapcontext, GLIBC_2_1) |
| |
| #endif |
