From 1befcddfd218cf487112296b793ddae8db9110b1 Mon Sep 17 00:00:00 2001
From: Theo de Raadt <deraadt@cvs.openbsd.org>
Date: Sun, 16 May 2021 03:23:49 +0000
Subject: add riscv asm for these two security-feature checking regress tests
 with drahn

---
 regress/sys/kern/noexec/Makefile     | 3 ++-
 regress/sys/kern/noexec/testfly.S    | 8 +++++++-
 regress/sys/kern/stackpivot/Makefile | 1 +
 regress/sys/kern/stackpivot/pivot.h  | 2 ++
 4 files changed, 12 insertions(+), 2 deletions(-)

(limited to 'regress/sys/kern')

diff --git a/regress/sys/kern/noexec/Makefile b/regress/sys/kern/noexec/Makefile
index 96103c332eb..f2717bba257 100644
--- a/regress/sys/kern/noexec/Makefile
+++ b/regress/sys/kern/noexec/Makefile
@@ -1,4 +1,4 @@
-#	$OpenBSD: Makefile,v 1.22 2020/12/17 00:51:12 bluhm Exp $
+#	$OpenBSD: Makefile,v 1.23 2021/05/16 03:23:48 deraadt Exp $
 
 PROG=		noexec
 SRCS=		noexec.c testfly.S
@@ -69,6 +69,7 @@ nxmmap-mprotect: ${PROG}
     ${MACHINE} != "i386" && \
     ${MACHINE} != "octeon" && \
     ${MACHINE} != "powerpc64" && \
+    ${MACHINE} != "riscv64" && \
     ${MACHINE} != "sparc64"
 REGRESS_TARGETS=run-regress-skiparch
 run-regress-skiparch:
diff --git a/regress/sys/kern/noexec/testfly.S b/regress/sys/kern/noexec/testfly.S
index 46faa42d936..3fabe27cdf4 100644
--- a/regress/sys/kern/noexec/testfly.S
+++ b/regress/sys/kern/noexec/testfly.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: testfly.S,v 1.8 2020/07/06 07:31:19 kettenis Exp $	*/
+/*	$OpenBSD: testfly.S,v 1.9 2021/05/16 03:23:48 deraadt Exp $	*/
 
 /*
  * Copyright (c) 2002,2003 Michael Shalayeff
@@ -65,6 +65,12 @@ LEAF(testfly, 0)
 END(testfly)
 #endif
 
+#ifdef __riscv64
+ENTRY(testfly)
+	jr	ra
+END(testfly)
+#endif
+
 #ifdef __powerpc__
 ENTRY(testfly)
 	blr
diff --git a/regress/sys/kern/stackpivot/Makefile b/regress/sys/kern/stackpivot/Makefile
index a9f963de3a0..fa6f2450e75 100644
--- a/regress/sys/kern/stackpivot/Makefile
+++ b/regress/sys/kern/stackpivot/Makefile
@@ -3,6 +3,7 @@
     ${MACHINE} != "amd64" && \
     ${MACHINE} != "i386" && \
     ${MACHINE} != "powerpc64" && \
+    ${MACHINE} != "riscv64" && \
     ${MACHINE_ARCH} != "powerpc" && \
     ${MACHINE_ARCH} != "mips64" && \
     ${MACHINE_ARCH} != "mips64el"
diff --git a/regress/sys/kern/stackpivot/pivot.h b/regress/sys/kern/stackpivot/pivot.h
index eec535278ee..fe87baab431 100644
--- a/regress/sys/kern/stackpivot/pivot.h
+++ b/regress/sys/kern/stackpivot/pivot.h
@@ -14,6 +14,8 @@ static void pivot(void *newstack) {
     asm("mr %%r1, %0; ld %%r3, 0(%%r1); mtlr %%r3; blr;" ::"r"(newstack));
 #elif defined(__powerpc__)
     asm("mr %%r1, %0; lwz %%r3, 0(%%r1); mtlr %%r3; blr;" ::"r"(newstack));
+#elif defined(__riscv)
+    asm("mv sp, %0; ld ra, 0(sp); jr ra" ::"r"(newstack));
 #endif
 }
 
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