@@ -41,6 +41,7 @@
#include "verifier_map_ret_val.skel.h"
#include "verifier_masking.skel.h"
#include "verifier_meta_access.skel.h"
+#include "verifier_movs.skel.h"
#include "verifier_netfilter_ctx.skel.h"
#include "verifier_netfilter_retcode.skel.h"
#include "verifier_prevent_map_lookup.skel.h"
@@ -143,6 +144,7 @@ void test_verifier_map_ptr_mixing(void) { RUN(verifier_map_ptr_mixing); }
void test_verifier_map_ret_val(void) { RUN(verifier_map_ret_val); }
void test_verifier_masking(void) { RUN(verifier_masking); }
void test_verifier_meta_access(void) { RUN(verifier_meta_access); }
+void test_verifier_movs(void) { RUN(verifier_movs); }
void test_verifier_netfilter_ctx(void) { RUN(verifier_netfilter_ctx); }
void test_verifier_netfilter_retcode(void) { RUN(verifier_netfilter_retcode); }
void test_verifier_prevent_map_lookup(void) { RUN(verifier_prevent_map_lookup); }
new file mode 100644
@@ -0,0 +1,67 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+#include "bpf_misc.h"
+
+SEC("socket")
+__description("MOV32S, S8")
+__success __success_unpriv __retval(0x23)
+__naked void mov32s_s8(void)
+{
+ asm volatile (" \
+ w0 = 0xff23; \
+ w0 = (s8)w0; \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("MOV32S, S16")
+__success __success_unpriv __retval(0xFFFFff23)
+__naked void mov32s_s16(void)
+{
+ asm volatile (" \
+ w0 = 0xff23; \
+ w0 = (s16)w0; \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("MOV64S, S8")
+__success __success_unpriv __retval(-2)
+__naked void mov64s_s8(void)
+{
+ asm volatile (" \
+ r0 = 0x1fe; \
+ r0 = (s8)r0; \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("MOV64S, S16")
+__success __success_unpriv __retval(0xf23)
+__naked void mov64s_s16(void)
+{
+ asm volatile (" \
+ r0 = 0xf0f23; \
+ r0 = (s16)r0; \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("MOV64S, S32")
+__success __success_unpriv __retval(-2)
+__naked void mov64s_s32(void)
+{
+ asm volatile (" \
+ r0 = 0xfffffffe; \
+ r0 = (s32)r0; \
+ exit; \
+" ::: __clobber_all);
+}
+
+char _license[] SEC("license") = "GPL";
Signed-off-by: Yonghong Song <yhs@fb.com> --- .../selftests/bpf/prog_tests/verifier.c | 2 + .../selftests/bpf/progs/verifier_movs.c | 67 +++++++++++++++++++ 2 files changed, 69 insertions(+) create mode 100644 tools/testing/selftests/bpf/progs/verifier_movs.c