Index: head/libexec/rtld-elf/riscv/rtld_start.S
===================================================================
--- head/libexec/rtld-elf/riscv/rtld_start.S	(revision 365341)
+++ head/libexec/rtld-elf/riscv/rtld_start.S	(revision 365342)
@@ -1,129 +1,130 @@
 /*-
  * Copyright (c) 2015-2018 Ruslan Bukin <br@bsdpad.com>
  * All rights reserved.
  *
  * This software was developed by SRI International and the University of
  * Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237
  * ("CTSRD"), as part of the DARPA CRASH research programme.
  *
  * This software was developed by the University of Cambridge Computer
  * Laboratory as part of the CTSRD Project, with support from the UK Higher
  * Education Innovation Fund (HEIF).
  *
  * 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("$FreeBSD$");
 
 /*
  * func_ptr_type
  * _rtld(Elf_Addr *sp, func_ptr_type *exit_proc, Obj_Entry **objp)
  */
 
 ENTRY(.rtld_start)
 	mv	s0, a0		/* Put ps_strings in a callee-saved register */
 	mv	s1, sp		/* And the stack pointer */
 
 	addi	sp, sp, -16	/* Make room for obj_main & exit proc */
 
 	mv	a1, sp		/* exit_proc */
 	addi	a2, a1, 8	/* obj_main */
 	jal	_rtld		/* Call the loader */
 	mv	t0, a0		/* Backup the entry point */
 
 	ld	a2, 0(sp)	/* Load cleanup */
 	ld	a1, 8(sp)	/* Load obj_main */
 	mv	a0, s0		/* Restore ps_strings */
 	mv	sp, s1		/* Restore the stack pointer */
 	jr	t0		/* Jump to the entry point */
 END(.rtld_start)
 
 /*
  * t0 = obj pointer
  * t1 = reloc offset
  */
 ENTRY(_rtld_bind_start)
 	/* Save the arguments and ra */
-	addi	sp, sp, -(8 * 17)
+	/* We require 17 dwords, but the stack must be aligned to 16-bytes */
+	addi	sp, sp, -(8 * 18)
 	sd	a0, (8 * 0)(sp)
 	sd	a1, (8 * 1)(sp)
 	sd	a2, (8 * 2)(sp)
 	sd	a3, (8 * 3)(sp)
 	sd	a4, (8 * 4)(sp)
 	sd	a5, (8 * 5)(sp)
 	sd	a6, (8 * 6)(sp)
 	sd	a7, (8 * 7)(sp)
 	sd	ra, (8 * 8)(sp)
 
 #ifdef __riscv_float_abi_double
 	/* Save any floating-point arguments */
 	fsd	fa0, (8 * 9)(sp)
 	fsd	fa1, (8 * 10)(sp)
 	fsd	fa2, (8 * 11)(sp)
 	fsd	fa3, (8 * 12)(sp)
 	fsd	fa4, (8 * 13)(sp)
 	fsd	fa5, (8 * 14)(sp)
 	fsd	fa6, (8 * 15)(sp)
 	fsd	fa7, (8 * 16)(sp)
 #endif
 
 	/* Reloc offset is 3x of the .got.plt offset */
 	slli	a1, t1, 1	/* Mult items by 2 */
 	add	a1, a1, t1	/* Plus item */
 
 	/* Load obj */
 	mv	a0, t0
 
 	/* Call into rtld */
 	jal	_rtld_bind
 
 	/* Backup the address to branch to */
 	mv	t0, a0
 
 	/* Restore the arguments and ra */
 	ld	a0, (8 * 0)(sp)
 	ld	a1, (8 * 1)(sp)
 	ld	a2, (8 * 2)(sp)
 	ld	a3, (8 * 3)(sp)
 	ld	a4, (8 * 4)(sp)
 	ld	a5, (8 * 5)(sp)
 	ld	a6, (8 * 6)(sp)
 	ld	a7, (8 * 7)(sp)
 	ld	ra, (8 * 8)(sp)
 
 #ifdef __riscv_float_abi_double
 	/* Restore floating-point arguments */
 	fld	fa0, (8 * 9)(sp)
 	fld	fa1, (8 * 10)(sp)
 	fld	fa2, (8 * 11)(sp)
 	fld	fa3, (8 * 12)(sp)
 	fld	fa4, (8 * 13)(sp)
 	fld	fa5, (8 * 14)(sp)
 	fld	fa6, (8 * 15)(sp)
 	fld	fa7, (8 * 16)(sp)
 #endif
-	addi	sp, sp, (8 * 17)
+	addi	sp, sp, (8 * 18)
 
 	/* Call into the correct function */
 	jr	t0
 END(_rtld_bind_start)