diff options
Diffstat (limited to 'REORG.TODO/sysdeps/unix/sysv/linux/tile/makecontext.c')
| -rw-r--r-- | REORG.TODO/sysdeps/unix/sysv/linux/tile/makecontext.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/tile/makecontext.c b/REORG.TODO/sysdeps/unix/sysv/linux/tile/makecontext.c new file mode 100644 index 0000000000..26e4d426ef --- /dev/null +++ b/REORG.TODO/sysdeps/unix/sysv/linux/tile/makecontext.c @@ -0,0 +1,67 @@ +/* Copyright (C) 2011-2017 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 <stdarg.h> +#include <stdio.h> +#include <stdint.h> +#include <stdlib.h> +#include <ucontext.h> +#include <arch/abi.h> + +void +__makecontext (ucontext_t *ucp, void (*func) (void), int argc, ...) +{ + extern void __startcontext (void); + uint_reg_t *sp, *args; + va_list ap; + int i; + + /* Initialize the top of stack. */ + sp = (uint_reg_t *) ((((intptr_t) ucp->uc_stack.ss_sp + + ucp->uc_stack.ss_size) & -16L) - 16); + + /* Allow room for memory-passed arguments if necessary. */ + if (argc > 10) + sp -= 2 + (argc - 10); + + sp[0] = sp[1] = 0; + + /* Set parameters. */ + va_start (ap, argc); + args = &ucp->uc_mcontext.gregs[0]; + for (i = 0; i < argc; i++) + { + if (i == 10) + args = &sp[2]; + *args++ = va_arg (ap, long); + } + va_end (ap); + + /* Start in the trampoline. */ + ucp->uc_mcontext.pc = (long) __startcontext; + + /* Set stack pointer. */ + ucp->uc_mcontext.sp = (long) sp; + + /* Pass FUNC to __startcontext in r31. */ + ucp->uc_mcontext.gregs[31] = (long) func; + + /* Pass ucp->uc_link to __startcontext in r30. */ + ucp->uc_mcontext.gregs[30] = (long) ucp->uc_link; +} +weak_alias (__makecontext, makecontext) |