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2001-04-04 Ulrich Drepper <drepper@redhat.com> * sysdeps/unix/sysv/linux/s390/s390-64/Dist: Add ucontext_i.h. * sysdeps/unix/sysv/linux/s390/s390-32/Dist: Likewise. 2001-04-04 Martin Schwidefsky <schwidefsky@de.ibm.com> * sysdeps/unix/sysv/linux/s390/s390-32/getcontext.S: New file. * sysdeps/unix/sysv/linux/s390/s390-32/makecontext.c: New file. * sysdeps/unix/sysv/linux/s390/s390-32/setcontext.S: New file. * sysdeps/unix/sysv/linux/s390/s390-32/ucontext_i.h: New file. * sysdeps/unix/sysv/linux/s390/s390-64/getcontext.S: New file. * sysdeps/unix/sysv/linux/s390/s390-64/makecontext.c: New file. * sysdeps/unix/sysv/linux/s390/s390-64/setcontext.S: New file. * sysdeps/unix/sysv/linux/s390/s390-64/ucontext_i.h: New file. * sysdeps/unix/sysv/linux/s390/swapcontext.c: New file. * sunrpc/rpc_scan.c (symbols): Add entry for HYPER. * sunrpc/rpc_scan.h (enum tok_kind): Add TOK_HYPER. * sunrpc/rpc_parse.c (get_type): Handle TOK_HYPER. (unsigned_dec): Likewise. Patch by atai@jezebel.dreamhost.com.
102 lines
3.2 KiB
C
102 lines
3.2 KiB
C
/* Copyright (C) 2001 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <libintl.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <ucontext.h>
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/* This implementation can handle any ARGC value but only
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normal integer type parameters. Parameters of type float,
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double, complex and structure with sizes 0, 2, 4 or 8
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won't work.
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makecontext sets up a stack and the registers for the
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context. The stack looks like this:
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size offset
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%r15 -> +-----------------------+
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4 | back chain (zero) | 0
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4 | reserved | 4
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88 | save area for (*func) | 8
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+-----------------------+
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n | overflow parameters | 96
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+-----------------------+
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8 | trampoline | 96+n
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+-----------------------+
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The registers are set up like this:
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%r2-%r6: parameters 1 to 5
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%r7 : (*func) pointer
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%r8 : uc_link from ucontext structure
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%r9 : address of setcontext
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%r14 : return address to uc_link trampoline
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%r15 : stack pointer.
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The trampoline looks like this:
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basr %r14,%r7
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lr %r2,%r8
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br %r9. */
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void
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__makecontext (ucontext_t *ucp, void (*func) (void), int argc, ...)
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{
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unsigned long *sp;
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va_list ap;
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int i;
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sp = (long *) (((long) ucp->uc_stack.ss_sp + ucp->uc_stack.ss_size) & -8L);
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/* Setup the trampoline. */
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*--sp = 0x07f90000;
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*--sp = 0x0de71828;
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/* Set the return address to trampoline. */
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ucp->uc_mcontext.gregs[14] = (long) sp;
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/* Set register parameters. */
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va_start (ap, argc);
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for (i = 0; (i < argc) && (i < 5); i++)
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ucp->uc_mcontext.gregs[2+i] = va_arg (ap, long);
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/* The remaining arguments go to the overflow area. */
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if (argc > 5) {
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sp -= argc - 5;
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for (i = 5; i < argc; i++)
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sp[i] = va_arg(ap, long);
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}
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va_end (ap);
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/* Make room for the save area and set the backchain. */
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sp -= 24;
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*sp = 0;
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/* Pass (*func) to __start_context in %r7. */
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ucp->uc_mcontext.gregs[7] = (long) func;
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/* Pass ucp->uc_link to __start_context in %r8. */
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ucp->uc_mcontext.gregs[8] = (long) ucp->uc_link;
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/* Pass address of setcontext in %r9. */
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ucp->uc_mcontext.gregs[9] = (long) &setcontext;
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/* Set stack pointer. */
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ucp->uc_mcontext.gregs[15] = (long) sp;
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}
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weak_alias (__makecontext, makecontext)
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