Add a version of the FreeBSD bootloader which can run in userland, packaged

as a shared library. This is intended to be used by BHyVe to load FreeBSD
kernels into new virtual machines.

2 files changed, 254 insertions, 0 deletions

diff --git a/sys/boot/userboot/libstand/Makefile b/sys/boot/userboot/libstand/Makefile
new file mode 100644
index 0000000..9e71a24
--- /dev/null
+++ b/sys/boot/userboot/libstand/Makefile
@@ -0,0 +1,161 @@
+# $FreeBSD$
+# Originally from	$NetBSD: Makefile,v 1.21 1997/10/26 22:08:38 lukem Exp $
+#
+# Notes:
+# - We don't use the libc strerror/sys_errlist because the string table is
+#   quite large.
+#
+
+WITHOUT_SSP=
+NO_MAN=
+
+.include <bsd.own.mk>
+
+S=		${.CURDIR}/../../../../lib/libstand
+
+.PATH:		${S}
+LIB=		stand
+INTERNALLIB=
+NO_PROFILE=
+NO_PIC=
+
+WARNS?=		0
+
+CFLAGS+= -ffreestanding -Wformat -fPIC
+CFLAGS+= -I${.CURDIR}/../../../../lib/libstand
+
+.if ${MACHINE_CPUARCH} == "i386" || ${MACHINE_CPUARCH} == "amd64"
+CFLAGS+=	-mno-mmx -mno-3dnow -mno-sse -mno-sse2
+.endif
+.if ${MACHINE_CPUARCH} == "i386"
+CFLAGS+=	-mpreferred-stack-boundary=2
+CFLAGS+=	-mno-sse3
+.endif
+.if ${MACHINE} == "pc98"
+CFLAGS+=	-Os
+.endif
+.if ${MACHINE_CPUARCH} == "powerpc"
+CFLAGS+=	-msoft-float -D_STANDALONE -DNETIF_DEBUG
+.endif
+.if ${MACHINE_CPUARCH} == "arm"
+CFLAGS+=	-msoft-float -D_STANDALONE
+.endif
+
+# standalone components and stuff we have modified locally
+SRCS+=	zutil.h __main.c assert.c bcd.c bswap.c environment.c getopt.c gets.c \
+	globals.c pager.c printf.c strdup.c strerror.c strtol.c random.c \
+	sbrk.c twiddle.c zalloc.c zalloc_malloc.c
+
+# private (pruned) versions of libc string functions
+SRCS+=	strcasecmp.c
+
+LIBC=	${.CURDIR}/../../../../lib/libc
+
+.PATH: ${LIBC}/net
+
+SRCS+= ntoh.c
+
+# string functions from libc
+.PATH: ${LIBC}/string
+.if ${MACHINE_CPUARCH} == "i386" || ${MACHINE_CPUARCH} == "powerpc" || \
+	${MACHINE_CPUARCH} == "sparc64" || ${MACHINE_CPUARCH} == "amd64" || \
+	${MACHINE_CPUARCH} == "arm"
+SRCS+=	bcmp.c bcopy.c bzero.c ffs.c index.c memccpy.c memchr.c memcmp.c \
+        memcpy.c memmove.c memset.c qdivrem.c rindex.c strcat.c strchr.c \
+        strcmp.c strcpy.c strcspn.c strlen.c strncat.c strncmp.c strncpy.c \
+	strpbrk.c strrchr.c strsep.c strspn.c strstr.c strtok.c swab.c
+.endif
+.if ${MACHINE_CPUARCH} == "arm"
+.PATH: ${LIBC}/arm/gen
+SRCS+= divsi3.S
+.endif
+.if ${MACHINE_CPUARCH} == "ia64"
+.PATH: ${LIBC}/ia64/string
+SRCS+=	bcmp.c bcopy.S bzero.S ffs.S index.c memccpy.c memchr.c memcmp.c \
+	memcpy.S memmove.S memset.c rindex.c strcat.c strchr.c \
+	strcmp.c strcpy.c strcspn.c strlen.c \
+	strncat.c strncmp.c strncpy.c strpbrk.c strrchr.c strsep.c \
+	strspn.c strstr.c strtok.c swab.c
+
+.PATH: ${LIBC}/ia64/gen
+SRCS+= __divdi3.S __divsi3.S __moddi3.S __modsi3.S
+SRCS+= __udivdi3.S __udivsi3.S __umoddi3.S __umodsi3.S
+.endif
+.if ${MACHINE_CPUARCH} == "powerpc"
+.PATH: ${LIBC}/libc/quad
+SRCS+=	ashldi3.c ashrdi3.c
+.PATH: ${LIBC}/powerpc/gen
+SRCS+=	syncicache.c
+.endif
+
+# uuid functions from libc
+.PATH: ${LIBC}/uuid
+SRCS+= uuid_equal.c uuid_is_nil.c
+
+# _setjmp/_longjmp
+.if ${MACHINE_CPUARCH} == "amd64"
+.PATH: ${.CURDIR}/amd64
+.elif ${MACHINE_ARCH} == "powerpc64"
+.PATH: ${S}/powerpc
+.else
+.PATH: ${S}/${MACHINE_CPUARCH}
+.endif
+SRCS+=	_setjmp.S
+
+# decompression functionality from libbz2
+# NOTE: to actually test this functionality after libbz2 upgrade compile
+# loader(8) with LOADER_BZIP2_SUPPORT defined
+.PATH: ${.CURDIR}/../../../../contrib/bzip2
+CFLAGS+= -DBZ_NO_STDIO -DBZ_NO_COMPRESS
+SRCS+=	libstand_bzlib_private.h
+
+.for file in bzlib.c crctable.c decompress.c huffman.c randtable.c
+SRCS+=	_${file}
+CLEANFILES+=	_${file}
+
+_${file}: ${file}
+	sed "s|bzlib_private\.h|libstand_bzlib_private.h|" ${.ALLSRC} > ${.TARGET}
+.endfor
+
+CLEANFILES+= libstand_bzlib_private.h
+libstand_bzlib_private.h: bzlib_private.h
+	sed -e 's|<stdlib.h>|"stand.h"|' \
+		${.ALLSRC} > ${.TARGET}
+
+# decompression functionality from libz
+.PATH: ${.CURDIR}/../../../../lib/libz
+CFLAGS+=-DHAVE_MEMCPY -I${.CURDIR}/../../../../lib/libz
+SRCS+=	adler32.c crc32.c libstand_zutil.h
+
+.for file in infback.c inffast.c inflate.c inftrees.c zutil.c
+SRCS+=	_${file}
+CLEANFILES+=	_${file}
+
+_${file}: ${file}
+	sed "s|zutil\.h|libstand_zutil.h|" ${.ALLSRC} > ${.TARGET}
+.endfor
+
+# depend on stand.h being able to be included multiple times
+CLEANFILES+= libstand_zutil.h
+libstand_zutil.h: zutil.h
+	sed -e 's|<stddef.h>|"stand.h"|' \
+	    -e 's|<string.h>|"stand.h"|' \
+	    -e 's|<stdlib.h>|"stand.h"|' \
+	    ${.ALLSRC} > ${.TARGET}
+
+# io routines
+SRCS+=	closeall.c dev.c ioctl.c nullfs.c stat.c \
+	fstat.c close.c lseek.c open.c read.c write.c readdir.c
+
+# network routines
+SRCS+=	arp.c ether.c inet_ntoa.c in_cksum.c net.c udp.c netif.c rpc.c
+
+# network info services:
+SRCS+=	bootp.c rarp.c bootparam.c
+
+# boot filesystems
+SRCS+=	ufs.c nfs.c cd9660.c tftp.c gzipfs.c bzipfs.c
+SRCS+=	dosfs.c ext2fs.c
+SRCS+=	splitfs.c
+
+.include <bsd.lib.mk>
diff --git a/sys/boot/userboot/libstand/amd64/_setjmp.S b/sys/boot/userboot/libstand/amd64/_setjmp.S
new file mode 100644
index 0000000..e841f49
--- /dev/null
+++ b/sys/boot/userboot/libstand/amd64/_setjmp.S
@@ -0,0 +1,93 @@
+/*-
+ * 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)
+	movq	%rdi,%rax
+	movq	0(%rsp),%rdx		/* retval */
+	movq	%rdx, 0(%rax)		/* 0; retval */
+	movq	%rbx, 8(%rax)		/* 1; rbx */
+	movq	%rsp,16(%rax)		/* 2; rsp */
+	movq	%rbp,24(%rax)		/* 3; rbp */
+	movq	%r12,32(%rax)		/* 4; r12 */
+	movq	%r13,40(%rax)		/* 5; r13 */
+	movq	%r14,48(%rax)		/* 6; r14 */
+	movq	%r15,56(%rax)		/* 7; r15 */
+	fnstcw	64(%rax)		/* 8; fpu cw */
+	stmxcsr	68(%rax)		/*    and mxcsr */
+	xorq	%rax,%rax
+	ret
+END(_setjmp)
+
+	.weak	CNAME(_longjmp)
+ENTRY(_longjmp)
+	movq	%rdi,%rdx
+	/* Restore the mxcsr, but leave exception flags intact. */
+	stmxcsr	-4(%rsp)
+	movl	68(%rdx),%eax
+	andl	$0xffffffc0,%eax
+	movl	-4(%rsp),%edi
+	andl	$0x3f,%edi
+	xorl	%eax,%edi
+	movl	%edi,-4(%rsp)
+	ldmxcsr -4(%rsp)
+	movq	%rsi,%rax		/* retval */
+	movq	0(%rdx),%rcx
+	movq	8(%rdx),%rbx
+	movq	16(%rdx),%rsp
+	movq	24(%rdx),%rbp
+	movq	32(%rdx),%r12
+	movq	40(%rdx),%r13
+	movq	48(%rdx),%r14
+	movq	56(%rdx),%r15
+	fldcw	64(%rdx)
+	testq	%rax,%rax
+	jnz	1f
+	incq	%rax
+1:	movq	%rcx,0(%rsp)
+	ret
+END(_longjmp)