diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/nios2/getcontext.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/nios2/getcontext.S | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/nios2/getcontext.S b/sysdeps/unix/sysv/linux/nios2/getcontext.S new file mode 100644 index 0000000000..ffbd91f72a --- /dev/null +++ b/sysdeps/unix/sysv/linux/nios2/getcontext.S @@ -0,0 +1,66 @@ +/* Save current context. + Copyright (C) 2015 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, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> +#include "ucontext_i.h" + +/* int getcontext (ucontext_t *ucp) + + Returns 0 on success -1 and errno on failure. + */ + .text +ENTRY(__getcontext) + stw r16, (UCONTEXT_MCONTEXT + 16*4)(r4) + stw r17, (UCONTEXT_MCONTEXT + 17*4)(r4) + stw r18, (UCONTEXT_MCONTEXT + 18*4)(r4) + stw r19, (UCONTEXT_MCONTEXT + 19*4)(r4) + stw r20, (UCONTEXT_MCONTEXT + 20*4)(r4) + stw r21, (UCONTEXT_MCONTEXT + 21*4)(r4) + stw r22, (UCONTEXT_MCONTEXT + 22*4)(r4) + stw ra, (UCONTEXT_MCONTEXT + 24*4)(r4) + stw fp, (UCONTEXT_MCONTEXT + 25*4)(r4) + stw gp, (UCONTEXT_MCONTEXT + 26*4)(r4) + /* Store return address at place for EA. */ + stw ra, (UCONTEXT_MCONTEXT + 28*4)(r4) + stw sp, (UCONTEXT_MCONTEXT + 29*4)(r4) + /* Store zero for return success. */ + stw zero, (UCONTEXT_MCONTEXT + 2*4)(r4) + + /* Store value "1" at uc_flags to recognize as getcontext created. */ + movi r2, 1 + stw r2, UCONTEXT_FLAGS(r4) + + /* Store MCONTEXT_VERSION at first word of mcontext_t. */ + movi r2, MCONTEXT_VERSION + stw r2, UCONTEXT_MCONTEXT(r4) + + /* Get signal mask. */ + /* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */ + movi r7, _NSIG8 + addi r6, r4, UCONTEXT_SIGMASK + mov r5, zero + movi r4, SIG_BLOCK + movi r2, SYS_ify (rt_sigprocmask) + trap + bne r7, zero, SYSCALL_ERROR_LABEL + + mov r2, zero + ret + +PSEUDO_END(__getcontext) +weak_alias(__getcontext, getcontext) |