diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/tile/getcontext.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/tile/getcontext.S | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/tile/getcontext.S b/sysdeps/unix/sysv/linux/tile/getcontext.S new file mode 100644 index 0000000000..dcfb653bdc --- /dev/null +++ b/sysdeps/unix/sysv/linux/tile/getcontext.S @@ -0,0 +1,95 @@ +/* Copyright (C) 2011-2014 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. + + 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 <arch/abi.h> + +#include "ucontext_i.h" + +/* int getcontext (ucontext_t *ucp) */ + + .text +ENTRY (__getcontext) + FEEDBACK_ENTER(__getcontext) + + /* Save the callee-saved GPRs. There's no need to save the + caller-saved GPRs since the eventual setcontext() or + swapcontext() will assume those registers are all dead. + Save value "1" to uc_flags to later recognize getcontext(). */ + { movei r11, 1; ADDI_PTR r10, r0, UC_FLAGS_OFFSET } + { ST_PTR r10, r11; addli r10, r0, UC_REG(30) } + { ST r10, r30; ADDI_PTR r10, r10, REGSIZE } + { ST r10, r31; ADDI_PTR r10, r10, REGSIZE } + { ST r10, r32; ADDI_PTR r10, r10, REGSIZE } + { ST r10, r33; ADDI_PTR r10, r10, REGSIZE } + { ST r10, r34; ADDI_PTR r10, r10, REGSIZE } + { ST r10, r35; ADDI_PTR r10, r10, REGSIZE } + { ST r10, r36; ADDI_PTR r10, r10, REGSIZE } + { ST r10, r37; ADDI_PTR r10, r10, REGSIZE } + { ST r10, r38; ADDI_PTR r10, r10, REGSIZE } + { ST r10, r39; ADDI_PTR r10, r10, REGSIZE } + { ST r10, r40; ADDI_PTR r10, r10, REGSIZE } + { ST r10, r41; ADDI_PTR r10, r10, REGSIZE } + { ST r10, r42; ADDI_PTR r10, r10, REGSIZE } + { ST r10, r43; ADDI_PTR r10, r10, REGSIZE } + { ST r10, r44; ADDI_PTR r10, r10, REGSIZE } + { ST r10, r45; ADDI_PTR r10, r10, REGSIZE } + { ST r10, r46; ADDI_PTR r10, r10, REGSIZE } + { ST r10, r47; ADDI_PTR r10, r10, REGSIZE } + { ST r10, r48; ADDI_PTR r10, r10, REGSIZE } + { ST r10, r49; ADDI_PTR r10, r10, REGSIZE } + { ST r10, r50; ADDI_PTR r10, r10, REGSIZE } + { ST r10, r51; ADDI_PTR r10, r10, REGSIZE } + { ST r10, r52; ADDI_PTR r10, r10, REGSIZE } + { ST r10, tp; ADDI_PTR r10, r10, REGSIZE } + { ST r10, sp; ADDI_PTR r10, r10, REGSIZE } + { ST r10, lr; ADDI_PTR r10, r10, REGSIZE } + lnk r11 /* Point PC at the "jrp lr" instruction. */ + addli r11, r11, .Lreturn - . + { ST r10, r11; ADDI_PTR r10, r10, REGSIZE } + mfspr r11, INTERRUPT_CRITICAL_SECTION + { + ST r10, r11 + movei r1, 0 + } + + /* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG / 8) */ + { + movei r3, _NSIG / 8 + addli r2, r0, UC_SIGMASK_OFFSET + } + { + movei r0, SIG_BLOCK + moveli TREG_SYSCALL_NR_NAME, __NR_rt_sigprocmask + } + swint1 + BNEZ r1, .Lsyscall_error + +.Lreturn: + { + movei r0, 0 + jrp lr + } + +.Lsyscall_error: + j SYSCALL_ERROR_NAME + +END (__getcontext) +.hidden __getcontext + +weak_alias (__getcontext, getcontext) |