14 files changed, 971 insertions, 0 deletions
diff --git a/lib/libc/i386/gen/Makefile.inc b/lib/libc/i386/gen/Makefile.inc
new file mode 100644
index 0000000..89319c8
--- /dev/null
+++ b/lib/libc/i386/gen/Makefile.inc
@@ -0,0 +1,6 @@
+#	@(#)Makefile.inc	8.1 (Berkeley) 6/4/93
+# $FreeBSD$
+
+SRCS+=	_ctx_start.S _setjmp.S _set_tp.c fabs.S \
+	flt_rounds.c infinity.c ldexp.c makecontext.c modf.S \
+	rfork_thread.S setjmp.S signalcontext.c sigsetjmp.S
diff --git a/lib/libc/i386/gen/_ctx_start.S b/lib/libc/i386/gen/_ctx_start.S
new file mode 100644
index 0000000..a990035
--- /dev/null
+++ b/lib/libc/i386/gen/_ctx_start.S
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2001 Daniel Eischen <deischen@freebsd.org>
+ * All rights reserved.
+ *
+ * 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. Neither the name of the author 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 AUTHOR 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 AUTHOR 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 <machine/asm.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * _ctx_start((void *func)(int arg1, ..., argn),
+ *            int arg1, ..., argn, ucontext_t *ucp)
+ *
+ * 0(%esp)		- func
+ * 4(%esp)		- arg1
+ * 8(%esp)		- arg2
+ * ...
+ * (4*n)(%esp)		- argn
+ * (4*(n + 1))(%esp)	- ucp, %ebp setup to point here (base of stack)
+ */
+ENTRY(_ctx_start)
+	popl	%eax		/* get start function */
+	call	*%eax		/* call start function */
+	PIC_PROLOGUE
+	movl	%esi, %esp	/*
+				 * setup stack for completion routine;
+				 * ucp is now at top of stack
+				 */
+	call	PIC_PLT(_ctx_done)	/* should never return */
+	call	PIC_PLT(abort)		/* fubar */
+	ret
diff --git a/lib/libc/i386/gen/_set_tp.c b/lib/libc/i386/gen/_set_tp.c
new file mode 100644
index 0000000..8a6c929
--- /dev/null
+++ b/lib/libc/i386/gen/_set_tp.c
@@ -0,0 +1,40 @@
+/*-
+ * Copyright (c) 2004 Doug Rabson
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ *
+ *	$FreeBSD$
+ */
+
+#include <string.h>
+#include <stdint.h>
+#include <machine/sysarch.h>
+
+#include "libc_private.h"
+
+void
+_set_tp(void *tp)
+{
+
+	i386_set_gsbase(tp);
+}
diff --git a/lib/libc/i386/gen/_setjmp.S b/lib/libc/i386/gen/_setjmp.S
new file mode 100644
index 0000000..5d76373
--- /dev/null
+++ b/lib/libc/i386/gen/_setjmp.S
@@ -0,0 +1,78 @@
+/*-
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * William Jolitz.
+ *
+ * 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.
+ * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+	.asciz "@(#)_setjmp.s	5.1 (Berkeley) 4/23/90"
+#endif /* LIBC_SCCS and not lint */
+#include <machine/asm.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * C library -- _setjmp, _longjmp
+ *
+ *	_longjmp(a,v)
+ * will generate a "return(v)" from the last call to
+ *	_setjmp(a)
+ * by restoring registers from the environment 'a'.
+ * The previous signal state is NOT restored.
+ */
+
+ENTRY(_setjmp)
+	movl	4(%esp),%eax
+	movl	0(%esp),%edx
+	movl	%edx, 0(%eax)		/* rta */
+	movl	%ebx, 4(%eax)
+	movl	%esp, 8(%eax)
+	movl	%ebp,12(%eax)
+	movl	%esi,16(%eax)
+	movl	%edi,20(%eax)
+	fnstcw	24(%eax)
+	xorl	%eax,%eax
+	ret
+
+	.weak	CNAME(_longjmp)
+	.set	CNAME(_longjmp),CNAME(___longjmp)
+ENTRY(___longjmp)
+	movl	4(%esp),%edx
+	movl	8(%esp),%eax
+	movl	0(%edx),%ecx
+	movl	4(%edx),%ebx
+	movl	8(%edx),%esp
+	movl	12(%edx),%ebp
+	movl	16(%edx),%esi
+	movl	20(%edx),%edi
+	fldcw	24(%edx)
+	testl	%eax,%eax
+	jnz	1f
+	incl	%eax
+1:	movl	%ecx,0(%esp)
+	ret
diff --git a/lib/libc/i386/gen/fabs.S b/lib/libc/i386/gen/fabs.S
new file mode 100644
index 0000000..108e1b2
--- /dev/null
+++ b/lib/libc/i386/gen/fabs.S
@@ -0,0 +1,42 @@
+/*-
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * William Jolitz.
+ *
+ * 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.
+ * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+	.asciz "@(#)fabs.s	5.2 (Berkeley) 12/17/90"
+#endif /* LIBC_SCCS and not lint */
+#include <machine/asm.h>
+__FBSDID("$FreeBSD$");
+
+ENTRY(fabs)
+	fldl	4(%esp)
+	fabs
+	ret
diff --git a/lib/libc/i386/gen/flt_rounds.c b/lib/libc/i386/gen/flt_rounds.c
new file mode 100644
index 0000000..16417ff
--- /dev/null
+++ b/lib/libc/i386/gen/flt_rounds.c
@@ -0,0 +1,25 @@
+/*
+ * Written by J.T. Conklin, Apr 10, 1995
+ * Public domain.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <float.h>
+
+static const int map[] = {
+	1,	/* round to nearest */
+	3,	/* round to zero */
+	2,	/* round to negative infinity */
+	0	/* round to positive infinity */
+};
+
+int
+__flt_rounds(void)
+{
+	int x;
+
+	__asm("fnstcw %0" : "=m" (x));
+        return (map[(x >> 10) & 0x03]);
+}
diff --git a/lib/libc/i386/gen/infinity.c b/lib/libc/i386/gen/infinity.c
new file mode 100644
index 0000000..464b402
--- /dev/null
+++ b/lib/libc/i386/gen/infinity.c
@@ -0,0 +1,14 @@
+/*
+ * infinity.c
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <math.h>
+
+/* bytes for +Infinity on a 387 */
+const union __infinity_un __infinity = { { 0, 0, 0, 0, 0, 0, 0xf0, 0x7f } };
+
+/* bytes for NaN */
+const union __nan_un __nan = { { 0, 0, 0xc0, 0xff } };
diff --git a/lib/libc/i386/gen/ldexp.c b/lib/libc/i386/gen/ldexp.c
new file mode 100644
index 0000000..88bbb04
--- /dev/null
+++ b/lib/libc/i386/gen/ldexp.c
@@ -0,0 +1,64 @@
+/*-
+ * Copyright (c) 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Sean Eric Fagan.
+ *
+ * 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.
+ * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)ldexp.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <math.h>
+
+/*
+ * ldexp(value, exp): return value * (2 ** exp).
+ *
+ * Written by Sean Eric Fagan (sef@kithrup.COM)
+ * Sun Mar 11 20:27:09 PST 1990
+ */
+
+/*
+ * We do the conversion in C to let gcc optimize it away, if possible.
+ */
+double
+ldexp (double value, int exp)
+{
+	double temp, texp, temp2;
+	texp = exp;
+#ifdef __GNUC__
+	__asm ("fscale "
+		: "=u" (temp2), "=t" (temp)
+		: "0" (texp), "1" (value));
+#else
+#error unknown asm
+#endif
+	return (temp);
+}
diff --git a/lib/libc/i386/gen/makecontext.c b/lib/libc/i386/gen/makecontext.c
new file mode 100644
index 0000000..167cb12
--- /dev/null
+++ b/lib/libc/i386/gen/makecontext.c
@@ -0,0 +1,163 @@
+/*
+ * Copyright (c) 2001 Daniel M. Eischen <deischen@freebsd.org>
+ * All rights reserved.
+ *
+ * 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. Neither the name of the author 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 AUTHOR 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 AUTHOR 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/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/signal.h>
+#include <sys/ucontext.h>
+
+#include <errno.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+/* Prototypes */
+extern void _ctx_start(ucontext_t *, int argc, ...);
+
+
+__weak_reference(__makecontext, makecontext);
+
+void
+_ctx_done (ucontext_t *ucp)
+{
+	if (ucp->uc_link == NULL)
+		exit(0);
+	else {
+		/*
+		 * Since this context has finished, don't allow it
+		 * to be restarted without being reinitialized (via
+		 * setcontext or swapcontext).
+		 */
+		ucp->uc_mcontext.mc_len = 0;
+
+		/* Set context to next one in link */
+		/* XXX - what to do for error, abort? */
+		setcontext((const ucontext_t *)ucp->uc_link);
+		abort();	/* should never get here */
+	}
+}
+
+void
+__makecontext(ucontext_t *ucp, void (*start)(void), int argc, ...)
+{
+	va_list		ap;
+	char		*stack_top;
+	intptr_t	*argp;
+	int		i;
+
+	if (ucp == NULL)
+		return;
+	else if ((ucp->uc_stack.ss_sp == NULL) ||
+	    (ucp->uc_stack.ss_size < MINSIGSTKSZ)) {
+		/*
+		 * This should really return -1 with errno set to ENOMEM
+		 * or something, but the spec says that makecontext is
+		 * a void function.   At least make sure that the context
+		 * isn't valid so it can't be used without an error.
+		 */
+		ucp->uc_mcontext.mc_len = 0;
+	}
+	/* XXX - Do we want to sanity check argc? */
+	else if ((argc < 0) || (argc > NCARGS)) {
+		ucp->uc_mcontext.mc_len = 0;
+	}
+	/* Make sure the context is valid. */
+	else if (ucp->uc_mcontext.mc_len == sizeof(mcontext_t)) {
+		/*
+		 * Arrange the stack as follows:
+		 *
+		 *	_ctx_start()	- context start wrapper
+		 *	start()		- user start routine
+		 * 	arg1            - first argument, aligned(16)
+		 *	...
+		 *	argn
+		 *	ucp		- this context, %ebp points here
+		 *
+		 * When the context is started, control will return to
+		 * the context start wrapper which will pop the user
+		 * start routine from the top of the stack.  After that,
+		 * the top of the stack will be setup with all arguments
+		 * necessary for calling the start routine.  When the
+		 * start routine returns, the context wrapper then sets
+		 * the stack pointer to %ebp which was setup to point to
+		 * the base of the stack (and where ucp is stored).  It
+		 * will then call _ctx_done() to swap in the next context
+		 * (uc_link != 0) or exit the program (uc_link == 0).
+		 */
+		stack_top = (char *)(ucp->uc_stack.ss_sp +
+		    ucp->uc_stack.ss_size - sizeof(intptr_t));
+
+		/*
+		 * Adjust top of stack to allow for 3 pointers (return
+		 * address, _ctx_start, and ucp) and argc arguments.
+		 * We allow the arguments to be pointers also.  The first
+		 * argument to the user function must be properly aligned.
+		 */
+		stack_top = stack_top - (sizeof(intptr_t) * (1 + argc));
+		stack_top = (char *)((unsigned)stack_top & ~15);
+		stack_top = stack_top - (2 * sizeof(intptr_t));
+		argp = (intptr_t *)stack_top;
+
+		/*
+		 * Setup the top of the stack with the user start routine
+		 * followed by all of its aguments and the pointer to the
+		 * ucontext.  We need to leave a spare spot at the top of
+		 * the stack because setcontext will move eip to the top
+		 * of the stack before returning.
+		 */
+		*argp = (intptr_t)_ctx_start;  /* overwritten with same value */
+		argp++;
+		*argp = (intptr_t)start;
+		argp++;
+
+		/* Add all the arguments: */
+		va_start(ap, argc);
+		for (i = 0; i < argc; i++) {
+			*argp = va_arg(ap, intptr_t);
+			argp++;
+		}
+		va_end(ap);
+
+		/* The ucontext is placed at the bottom of the stack. */
+		*argp = (intptr_t)ucp;
+
+		/*
+		 * Set the machine context to point to the top of the
+		 * stack and the program counter to the context start
+		 * wrapper.  Note that setcontext() pushes the return
+		 * address onto the top of the stack, so allow for this
+		 * by adjusting the stack downward 1 slot.  Also set
+		 * %esi to point to the base of the stack where ucp
+		 * is stored.
+		 */
+		ucp->uc_mcontext.mc_esi = (int)argp;
+		ucp->uc_mcontext.mc_ebp = 0;
+		ucp->uc_mcontext.mc_esp = (int)stack_top + sizeof(caddr_t);
+		ucp->uc_mcontext.mc_eip = (int)_ctx_start;
+	}
+}
diff --git a/lib/libc/i386/gen/modf.S b/lib/libc/i386/gen/modf.S
new file mode 100644
index 0000000..8310a0a
--- /dev/null
+++ b/lib/libc/i386/gen/modf.S
@@ -0,0 +1,84 @@
+/*-
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Sean Eric Fagan.
+ *
+ * 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.
+ * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+	.asciz "@(#)modf.s	5.5 (Berkeley) 3/18/91"
+#endif /* LIBC_SCCS and not lint */
+#include <machine/asm.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * modf(value, iptr): return fractional part of value, and stores the
+ * integral part into iptr (a pointer to double).
+ *
+ * Written by Sean Eric Fagan (sef@kithrup.COM)
+ * Sun Mar 11 20:27:30 PST 1990
+ */
+
+/* With CHOP mode on, frndint behaves as TRUNC does.  Useful. */
+
+ENTRY(modf)
+	pushl %ebp
+	movl %esp,%ebp
+	/* Check for Inf/NaN */
+	movl 12(%ebp),%eax
+	andl $0x7fffffff,%eax
+	cmpl $0x7ff00000,%eax
+	jae 1f
+	/* Finite value */
+	subl $16,%esp
+	fnstcw -12(%ebp)
+	movw -12(%ebp),%dx
+	orw $3072,%dx
+	movw %dx,-16(%ebp)
+	fldcw -16(%ebp)
+	fldl 8(%ebp)
+	frndint
+	fstpl -8(%ebp)
+	fldcw -12(%ebp)
+	movl 16(%ebp),%eax
+	movl -8(%ebp),%edx
+	movl -4(%ebp),%ecx
+	movl %edx,(%eax)
+	movl %ecx,4(%eax)
+	fldl 8(%ebp)
+	fsubl -8(%ebp)
+	leave
+	ret
+	/* Inf/NaN handling */
+1:	fldl 8(%ebp)
+	movl 16(%ebp),%edx
+	fstl (%edx)
+	fldz
+	fdivp	/* return +/- 0 for +/- Inf, NaN for NaN */
+	leave
+	ret
diff --git a/lib/libc/i386/gen/rfork_thread.S b/lib/libc/i386/gen/rfork_thread.S
new file mode 100644
index 0000000..c0fc624
--- /dev/null
+++ b/lib/libc/i386/gen/rfork_thread.S
@@ -0,0 +1,117 @@
+/*-
+ * Copyright (c) 2000 Peter Wemm <peter@FreeBSD.org>
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 <machine/asm.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * With thanks to John Dyson for the original version of this.
+ */
+
+#include <SYS.h>
+
+/*
+ *                8      12          16         20
+ * rfork_thread(flags, stack_addr, start_fnc, start_arg);
+ *
+ * flags:		Flags to rfork system call.  See rfork(2).
+ * stack_addr:		Top of stack for thread.
+ * start_fnc:		Address of thread function to call in child.
+ * start_arg:		Argument to pass to the thread function in child.
+ */
+
+ENTRY(rfork_thread)
+	pushl	%ebp
+	movl	%esp, %ebp
+	pushl	%esi
+
+	/*
+	 * Push thread info onto the new thread's stack
+	 */
+	movl	12(%ebp), %esi	# get stack addr
+
+	subl	$4, %esi
+	movl	20(%ebp), %eax	# get start argument
+	movl	%eax, (%esi)
+
+	subl	$4, %esi
+	movl	16(%ebp), %eax	# get start thread address
+	movl	%eax, (%esi)
+
+	/*
+	 * Prepare and execute the thread creation syscall
+	 */
+	pushl	8(%ebp)
+	pushl	$0
+	movl	$SYS_rfork, %eax
+	KERNCALL
+	jb 	2f
+
+	/*
+	 * Check to see if we are in the parent or child
+	 */
+	cmpl	$0, %edx
+	jnz	1f
+	addl	$8, %esp
+	popl	%esi
+	movl	%ebp, %esp
+	popl	%ebp
+	ret
+	.p2align 2
+
+	/*
+	 * If we are in the child (new thread), then
+	 * set-up the call to the internal subroutine.  If it
+	 * returns, then call __exit.
+	 */
+1:
+	movl	%esi,%esp
+	popl	%eax 
+	call	*%eax
+	addl	$4, %esp
+
+	/*
+	 * Exit system call
+	 */
+	pushl	%eax
+	pushl	$0
+#ifdef SYS_exit
+	movl	$SYS_exit, %eax
+#else
+	movl	$SYS_sys_exit, %eax
+#endif
+	KERNCALL
+
+	/*
+	 * Branch here if the thread creation fails:
+	 */
+2:
+	addl	$8, %esp
+	popl	%esi
+	movl	%ebp, %esp
+	popl	%ebp
+	PIC_PROLOGUE
+	jmp	PIC_PLT(HIDENAME(cerror))
diff --git a/lib/libc/i386/gen/setjmp.S b/lib/libc/i386/gen/setjmp.S
new file mode 100644
index 0000000..900ade6
--- /dev/null
+++ b/lib/libc/i386/gen/setjmp.S
@@ -0,0 +1,98 @@
+/*-
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * William Jolitz.
+ *
+ * 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.
+ * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+	.asciz "@(#)setjmp.s	5.1 (Berkeley) 4/23/90"
+#endif /* LIBC_SCCS and not lint */
+#include <machine/asm.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * C library -- _setjmp, _longjmp
+ *
+ *	longjmp(a,v)
+ * will generate a "return(v)" from the last call to
+ *	setjmp(a)
+ * by restoring registers from the environment 'a'.
+ * The previous signal state is restored.
+ */
+
+#include "SYS.h"
+
+ENTRY(setjmp)
+	movl	4(%esp),%ecx
+	PIC_PROLOGUE
+	leal	28(%ecx), %eax
+	pushl	%eax			/* (sigset_t*)oset */
+	pushl	$0			/* (sigset_t*)set  */
+	pushl	$1			/* SIG_BLOCK       */
+	call	PIC_PLT(CNAME(_sigprocmask))
+	addl	$12,%esp
+	PIC_EPILOGUE
+	movl	4(%esp),%ecx
+	movl	0(%esp),%edx
+	movl	%edx, 0(%ecx)
+	movl	%ebx, 4(%ecx)
+	movl	%esp, 8(%ecx)
+	movl	%ebp,12(%ecx)
+	movl	%esi,16(%ecx)
+	movl	%edi,20(%ecx)
+	fnstcw	24(%ecx)
+	xorl	%eax,%eax
+	ret
+
+	.weak CNAME(longjmp)
+	.set CNAME(longjmp),CNAME(__longjmp)
+ENTRY(__longjmp)
+	movl	4(%esp),%edx
+	PIC_PROLOGUE
+	pushl	$0			/* (sigset_t*)oset */
+	leal	28(%edx), %eax
+	pushl	%eax			/* (sigset_t*)set  */
+	pushl	$3			/* SIG_SETMASK     */
+	call	PIC_PLT(CNAME(_sigprocmask))
+	addl	$12,%esp
+	PIC_EPILOGUE
+	movl	4(%esp),%edx
+	movl	8(%esp),%eax
+	movl	0(%edx),%ecx
+	movl	4(%edx),%ebx
+	movl	8(%edx),%esp
+	movl	12(%edx),%ebp
+	movl	16(%edx),%esi
+	movl	20(%edx),%edi
+	fldcw	24(%edx)
+	testl	%eax,%eax
+	jnz	1f
+	incl	%eax
+1:	movl	%ecx,0(%esp)
+	ret
diff --git a/lib/libc/i386/gen/signalcontext.c b/lib/libc/i386/gen/signalcontext.c
new file mode 100644
index 0000000..877b655
--- /dev/null
+++ b/lib/libc/i386/gen/signalcontext.c
@@ -0,0 +1,79 @@
+/*-
+ * Copyright (c) 2002 Jonathan Mini <mini@freebsd.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/ucontext.h>
+#include <machine/psl.h>
+#include <machine/sigframe.h>
+#include <signal.h>
+#include <strings.h>
+
+__weak_reference(__signalcontext, signalcontext);
+
+extern void _ctx_start(ucontext_t *, int argc, ...);
+
+int
+__signalcontext(ucontext_t *ucp, int sig, __sighandler_t *func)
+{
+	register_t *p;
+	struct sigframe *sfp;
+
+	/*-
+	 * Set up stack.
+	 * (n = sizeof(int))
+	 * 2n+sizeof(struct sigframe)	ucp
+	 * 2n				struct sigframe
+	 * 1n				&func
+	 * 0n				&_ctx_start
+	 */
+	p = (register_t *)(void *)(intptr_t)ucp->uc_mcontext.mc_esp;
+	*--p = (register_t)(intptr_t)ucp;
+	p = (register_t *)((u_register_t)p & ~0xF);  /* Align to 16 bytes. */
+	p = (register_t *)((u_register_t)p - sizeof(struct sigframe));
+	sfp = (struct sigframe *)p;
+	bzero(sfp, sizeof(struct sigframe));
+	sfp->sf_signum = sig;
+	sfp->sf_siginfo = (register_t)(intptr_t)&sfp->sf_si;
+	sfp->sf_ucontext = (register_t)(intptr_t)&sfp->sf_uc;
+	sfp->sf_ahu.sf_action = (__siginfohandler_t *)func;
+	bcopy(ucp, &sfp->sf_uc, sizeof(ucontext_t));
+	sfp->sf_si.si_signo = sig;
+	*--p = (register_t)(intptr_t)func;
+
+	/*
+	 * Set up ucontext_t.
+	 */
+	ucp->uc_mcontext.mc_esi = ucp->uc_mcontext.mc_esp - sizeof(int);
+	ucp->uc_mcontext.mc_esp = (register_t)(intptr_t)p;
+	ucp->uc_mcontext.mc_eip = (register_t)(intptr_t)_ctx_start;
+	ucp->uc_mcontext.mc_eflags &= ~PSL_T;
+	ucp->uc_link = &sfp->sf_uc;
+	sigdelset(&ucp->uc_sigmask, sig);
+	return (0);
+}
diff --git a/lib/libc/i386/gen/sigsetjmp.S b/lib/libc/i386/gen/sigsetjmp.S
new file mode 100644
index 0000000..7c1f85c
--- /dev/null
+++ b/lib/libc/i386/gen/sigsetjmp.S
@@ -0,0 +1,110 @@
+/*-
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * William Jolitz.
+ *
+ * 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.
+ * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
+ *
+ *	@(#)setjmp.s	5.1 (Berkeley) 4/23/90"
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+	.text
+	.asciz "$Id: sigsetjmp.S,v 1.1 1993/12/05 13:01:05 ats Exp $"
+#endif /* LIBC_SCCS and not lint */
+#include <machine/asm.h>
+__FBSDID("$FreeBSD$");
+
+#include "SYS.h"
+
+/*-
+ * TODO:
+ *	Rename sigsetjmp to __sigsetjmp and siglongjmp to __siglongjmp,
+ *	remove the other *jmp functions and define everything in terms
+ *	of the renamed functions.  This requires compiler support for
+ *	the renamed functions (introduced in gcc-2.5.3; previous versions
+ *	only supported *jmp with 0 or 1 leading underscores).
+ *
+ *	Restore _all_ the registers and the signal mask atomically.  Can
+ *	use sigreturn() if sigreturn() works.
+ */
+
+ENTRY(sigsetjmp)
+	movl	8(%esp),%eax
+	movl	4(%esp),%ecx
+	movl	%eax,44(%ecx)
+	testl	%eax,%eax
+	jz	2f
+	PIC_PROLOGUE
+	leal	28(%ecx), %eax
+	pushl	%eax			/* (sigset_t*)oset */
+	pushl	$0			/* (sigset_t*)set  */
+	pushl	$1			/* SIG_BLOCK       */
+	call	PIC_PLT(CNAME(_sigprocmask))
+	addl	$12,%esp
+	PIC_EPILOGUE
+	movl	4(%esp),%ecx
+2:	movl	0(%esp),%edx
+	movl	%edx, 0(%ecx)
+	movl	%ebx, 4(%ecx)
+	movl	%esp, 8(%ecx)
+	movl	%ebp,12(%ecx)
+	movl	%esi,16(%ecx)
+	movl	%edi,20(%ecx)
+	fnstcw	24(%ecx)
+	xorl	%eax,%eax
+	ret
+
+	.weak CNAME(siglongjmp);
+	.set CNAME(siglongjmp),CNAME(__siglongjmp);
+ENTRY(__siglongjmp);
+	movl	4(%esp),%edx
+	cmpl	$0,44(%edx)
+	jz	2f
+	PIC_PROLOGUE
+	pushl	$0			/* (sigset_t*)oset */
+	leal	28(%edx), %eax
+	pushl	%eax			/* (sigset_t*)set  */
+	pushl	$3			/* SIG_SETMASK     */
+	call	PIC_PLT(CNAME(_sigprocmask))
+	addl	$12,%esp
+	PIC_EPILOGUE
+	movl	4(%esp),%edx
+2:	movl	8(%esp),%eax
+	movl	0(%edx),%ecx
+	movl	4(%edx),%ebx
+	movl	8(%edx),%esp
+	movl	12(%edx),%ebp
+	movl	16(%edx),%esi
+	movl	20(%edx),%edi
+	fninit
+	fldcw	24(%edx)
+	testl	%eax,%eax
+	jnz	1f
+	incl	%eax
+1:	movl	%ecx,0(%esp)
+	ret