diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/arm/makecontext.c')
-rw-r--r-- | sysdeps/unix/sysv/linux/arm/makecontext.c | 73 |
1 files changed, 0 insertions, 73 deletions
diff --git a/sysdeps/unix/sysv/linux/arm/makecontext.c b/sysdeps/unix/sysv/linux/arm/makecontext.c deleted file mode 100644 index 2ccd563869..0000000000 --- a/sysdeps/unix/sysv/linux/arm/makecontext.c +++ /dev/null @@ -1,73 +0,0 @@ -/* Copyright (C) 2012-2017 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 <stdarg.h> -#include <ucontext.h> - -/* Number of arguments that go in registers. */ -#define NREG_ARGS 4 - -/* Take a context previously prepared via getcontext() and set to - call func() with the given int only args. */ -void -__makecontext (ucontext_t *ucp, void (*func) (void), int argc, ...) -{ - extern void __startcontext (void); - unsigned long *funcstack; - va_list vl; - unsigned long *regptr; - unsigned int reg; - int misaligned; - - /* Start at the top of stack. */ - funcstack = (unsigned long *) (ucp->uc_stack.ss_sp + ucp->uc_stack.ss_size); - - /* Ensure the stack stays eight byte aligned. */ - misaligned = ((unsigned long) funcstack & 4) != 0; - - if ((argc > NREG_ARGS) && (argc & 1) != 0) - misaligned = !misaligned; - - if (misaligned) - funcstack -= 1; - - va_start (vl, argc); - - /* Reserve space for the on-stack arguments. */ - if (argc > NREG_ARGS) - funcstack -= (argc - NREG_ARGS); - - ucp->uc_mcontext.arm_sp = (unsigned long) funcstack; - ucp->uc_mcontext.arm_pc = (unsigned long) func; - - /* Exit to startcontext() with the next context in R4 */ - ucp->uc_mcontext.arm_r4 = (unsigned long) ucp->uc_link; - ucp->uc_mcontext.arm_lr = (unsigned long) __startcontext; - - /* The first four arguments go into registers. */ - regptr = &(ucp->uc_mcontext.arm_r0); - - for (reg = 0; (reg < argc) && (reg < NREG_ARGS); reg++) - *regptr++ = va_arg (vl, unsigned long); - - /* And the remainder on the stack. */ - for (; reg < argc; reg++) - *funcstack++ = va_arg (vl, unsigned long); - - va_end (vl); -} -weak_alias (__makecontext, makecontext) |