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[src/trunk]: src/lib/libc/arch/x86_64 Add ucontext glue for x86_64.
details: https://anonhg.NetBSD.org/src/rev/3ab2286e2a20
branches: trunk
changeset: 542470:3ab2286e2a20
user: fvdl <fvdl%NetBSD.org@localhost>
date: Thu Jan 30 02:07:30 2003 +0000
description:
Add ucontext glue for x86_64.
diffstat:
lib/libc/arch/x86_64/gen/Makefile.inc | 6 +-
lib/libc/arch/x86_64/gen/_lwp.c | 70 ++++++++++++++
lib/libc/arch/x86_64/gen/makecontext.c | 104 ++++++++++++++++++++++
lib/libc/arch/x86_64/gen/resumecontext.S | 68 ++++++++++++++
lib/libc/arch/x86_64/gen/swapcontext.S | 75 +++++++++++++++
lib/libc/arch/x86_64/sys/__sigaction14_sigtramp.c | 6 +-
lib/libc/arch/x86_64/sys/getcontext.S | 63 +++++++++++++
7 files changed, 388 insertions(+), 4 deletions(-)
diffs (truncated from 442 to 300 lines):
diff -r 91fa996e5bbe -r 3ab2286e2a20 lib/libc/arch/x86_64/gen/Makefile.inc
--- a/lib/libc/arch/x86_64/gen/Makefile.inc Thu Jan 30 02:04:59 2003 +0000
+++ b/lib/libc/arch/x86_64/gen/Makefile.inc Thu Jan 30 02:07:30 2003 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile.inc,v 1.2 2002/02/19 13:08:35 simonb Exp $
+# $NetBSD: Makefile.inc,v 1.3 2003/01/30 02:07:30 fvdl Exp $
# objects built from assembler sources (need lint stubs)
SRCS+= alloca.S bswap64.S byte_swap_2.S byte_swap_4.S fabs.S modf.S \
@@ -9,8 +9,10 @@
SRCS+= _setjmp.S
SRCS+= __sigsetjmp14.S
+SRCS+= resumecontext.S swapcontext.S
+
# objects built from C sources
-SRCS+= ldexp.c
+SRCS+= ldexp.c _lwp.c makecontext.c
# Common ieee754 constants and functions
SRCS+= ieee754_infinity.c ieee754_nanf.c
diff -r 91fa996e5bbe -r 3ab2286e2a20 lib/libc/arch/x86_64/gen/_lwp.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/libc/arch/x86_64/gen/_lwp.c Thu Jan 30 02:07:30 2003 +0000
@@ -0,0 +1,70 @@
+/* $NetBSD: _lwp.c,v 1.1 2003/01/30 02:07:30 fvdl Exp $ */
+
+/*-
+ * Copyright (c) 2001 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Nathan J. Williams.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the NetBSD
+ * Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/types.h>
+#include <inttypes.h>
+#include <ucontext.h>
+#include <lwp.h>
+#include <stdlib.h>
+
+void
+_lwp_makecontext(ucontext_t *u, void (*start)(void *),
+ void *arg, void *private, caddr_t stack_base, size_t stack_size)
+{
+ void **sp;
+
+ getcontext(u);
+ u->uc_link = NULL;
+
+ u->uc_stack.ss_sp = stack_base;
+ u->uc_stack.ss_size = stack_size;
+
+ /* LINTED uintptr_t is safe */
+ u->uc_mcontext.__gregs[_REG_RIP] = (uintptr_t)start;
+
+ sp = (void **) (((uintptr_t)(stack_base + stack_size) & ~15) - 8);
+
+ /* LINTED __greg_t is safe */
+ u->uc_mcontext.__gregs[_REG_RDI] = (__greg_t)arg;
+ *--sp = (void *) _lwp_exit;
+
+ /* LINTED uintptr_t is safe */
+ u->uc_mcontext.__gregs[_REG_URSP] = (uintptr_t) sp;
+
+ /* LINTED private is currently unused */
+}
diff -r 91fa996e5bbe -r 3ab2286e2a20 lib/libc/arch/x86_64/gen/makecontext.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/libc/arch/x86_64/gen/makecontext.c Thu Jan 30 02:07:30 2003 +0000
@@ -0,0 +1,104 @@
+/* $NetBSD: makecontext.c,v 1.1 2003/01/30 02:07:31 fvdl Exp $ */
+
+/*-
+ * Copyright (c) 1999 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Klaus Klein.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the NetBSD
+ * Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Modified from the i386 version for x86_64 by fvdl%wasabisystems.com@localhost.
+ *
+ */
+
+#include <sys/cdefs.h>
+#if defined(LIBC_SCCS) && !defined(lint)
+__RCSID("$NetBSD: makecontext.c,v 1.1 2003/01/30 02:07:31 fvdl Exp $");
+#endif
+
+#include <inttypes.h>
+#include <stddef.h>
+#include <ucontext.h>
+#include "extern.h"
+
+#include <stdarg.h>
+
+void
+makecontext(ucontext_t *ucp, void (*func)(void), int argc, ...)
+{
+ __greg_t *gr = ucp->uc_mcontext.__gregs;
+ uintptr_t *sp;
+ va_list ap;
+ int stackargs, i;
+
+ stackargs = argc - 6;
+
+ /* LINTED __greg_t is safe */
+ gr[_REG_RIP] = (__greg_t)func;
+
+ /* LINTED uintptr_t is safe */
+ sp = (uintptr_t *)
+ ((uintptr_t)ucp->uc_stack.ss_sp + ucp->uc_stack.ss_size);
+
+ /* LINTED uintptr_t is safe */
+ sp = (uintptr_t *)(((uintptr_t)sp & ~15) - 8);
+ sp--;
+ if (stackargs > 0)
+ sp -= stackargs;
+ /* LINTED __greg_t is safe */
+ gr[_REG_URSP] = (__greg_t)sp;
+ gr[_REG_RBP] = (__greg_t)0; /* Wipe out frame pointer. */
+
+ /* Put return address on top of stack. */
+ /* LINTED uintptr_t is safe */
+ *sp++ = (uintptr_t)_resumecontext;
+
+ /*
+ * Construct argument list.
+ * The registers used to pass the first 6 arguments
+ * (rdi, rsi, rdx, rcx, r8, r9) are the first 6 in gregs,
+ * in that order, so those arguments can just be copied to
+ * the gregs array.
+ */
+ va_start(ap, argc);
+ for (i = 0; i < 6 && argc > 0; i++) {
+ argc--;
+ /* LINTED __greg_t is safe */
+ gr[i] = va_arg(ap, __greg_t);
+ }
+
+ while (stackargs-- > 0) {
+ /* LINTED uintptr_t is safe */
+ *sp++ = va_arg(ap, uintptr_t);
+ }
+
+ va_end(ap);
+}
diff -r 91fa996e5bbe -r 3ab2286e2a20 lib/libc/arch/x86_64/gen/resumecontext.S
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/libc/arch/x86_64/gen/resumecontext.S Thu Jan 30 02:07:30 2003 +0000
@@ -0,0 +1,68 @@
+/* $NetBSD: resumecontext.S,v 1.1 2003/01/30 02:07:31 fvdl Exp $ */
+
+/*-
+ * Copyright (c) 1999 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Klaus Klein.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the NetBSD
+ * Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Modified for x86-64 by fvdl%wasabisystems.com@localhost
+ */
+
+#include <machine/asm.h>
+
+#if defined(LIBC_SCCS) && !defined(lint)
+ RCSID("$NetBSD: resumecontext.S,v 1.1 2003/01/30 02:07:31 fvdl Exp $")
+#endif /* LIBC_SCCS && !lint */
+
+/*
+ * This assembly-language implementation differs from the (obvious)
+ * C-language implementation only in not clobbering the previous
+ * function's return address (us), which is the point of the exercise.
+ */
+
+NENTRY(_resumecontext) /* profiling prologue would clobber TOS */
+ leaq -(8 + 784)(%rsp),%rdi /* retaddr + sizeof (ucontext_t) */
+ andq $~15,%rdi /* align on _UC_UCONTEXT_ALIGN */
+ movq %rdi,%rsp
+#ifdef PIC
+ call PIC_PLT(_C_LABEL(_getcontext))
+#else
+ call _C_LABEL(_getcontext)
+#endif
+ movq 4(%rsp),%rdi
+#ifdef PIC
+ call PIC_PLT(_C_LABEL(setcontext))
+#else
+ call _C_LABEL(setcontext)
+#endif
+ /* NOTREACHED */
diff -r 91fa996e5bbe -r 3ab2286e2a20 lib/libc/arch/x86_64/gen/swapcontext.S
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/libc/arch/x86_64/gen/swapcontext.S Thu Jan 30 02:07:30 2003 +0000
@@ -0,0 +1,75 @@
+/* $NetBSD: swapcontext.S,v 1.1 2003/01/30 02:07:31 fvdl Exp $ */
+
+/*
+ * Copyright (c) 2003 Wasabi Systems, Inc.
+ * All rights reserved.
+ *
+ * Written by Frank van der Linden for Wasabi Systems, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed for the NetBSD Project by
+ * Wasabi Systems, Inc.
+ * 4. The name of Wasabi Systems, Inc. may not be used to endorse
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