diff options
Diffstat (limited to 'REORG.TODO/sysdeps/unix/sysv/linux/ia64/__start_context.S')
| -rw-r--r-- | REORG.TODO/sysdeps/unix/sysv/linux/ia64/__start_context.S | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/ia64/__start_context.S b/REORG.TODO/sysdeps/unix/sysv/linux/ia64/__start_context.S new file mode 100644 index 0000000000..862b7ab024 --- /dev/null +++ b/REORG.TODO/sysdeps/unix/sysv/linux/ia64/__start_context.S @@ -0,0 +1,51 @@ +/* Copyright (C) 2001-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by David Mosberger-Tang <davidm@hpl.hp.com>. + + 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 <features.h> + +/* When a context set up by __makecontext() is activated, control + transfers to __start_context. When we get here: + + b1 = entry point of function to call + in0 = address of UCP to resume after function returns + in1 = global pointer for __start_context + out0 .. outN = arguments for function */ + +ENTRY(__start_context) + .prologue + alloc r2 = ar.pfs, 2, 0, 8, 0 + + .save rp, r4 // terminate call chain with a NULL rp + mov r4 = r0 + ;; + + .body + br.call.sptk rp = b1 +1: + mov gp = in1 // restore gp + cmp.ne p6,p0 = in0, r0 // uc_link != 0 ? + ;; +(p6) mov out0 = in0 +(p6) br.call.sptk rp = __setcontext +.Lexit: + mov out0 = 0 + br.call.sptk rp = HIDDEN_JUMPTARGET(exit) + +1: br.cond.sptk .Lexit +END(__start_context) |