Add unit tests for movsx insns.
Signed-off-by: Yonghong Song <yonghong.song@xxxxxxxxx>
---
.../selftests/bpf/prog_tests/verifier.c | 2 +
.../selftests/bpf/progs/verifier_movsx.c | 213 ++++++++++++++++++
2 files changed, 215 insertions(+)
create mode 100644 tools/testing/selftests/bpf/progs/verifier_movsx.c
diff --git a/tools/testing/selftests/bpf/prog_tests/verifier.c b/tools/testing/selftests/bpf/prog_tests/verifier.c
index 6eec6a9463c8..037af7799cdf 100644
--- a/tools/testing/selftests/bpf/prog_tests/verifier.c
+++ b/tools/testing/selftests/bpf/prog_tests/verifier.c
@@ -41,6 +41,7 @@
#include "verifier_map_ret_val.skel.h"
#include "verifier_masking.skel.h"
#include "verifier_meta_access.skel.h"
+#include "verifier_movsx.skel.h"
#include "verifier_netfilter_ctx.skel.h"
#include "verifier_netfilter_retcode.skel.h"
#include "verifier_prevent_map_lookup.skel.h"
@@ -144,6 +145,7 @@ 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_movsx(void) { RUN(verifier_movsx); }
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); }
diff --git a/tools/testing/selftests/bpf/progs/verifier_movsx.c b/tools/testing/selftests/bpf/progs/verifier_movsx.c
new file mode 100644
index 000000000000..9568089932d7
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/verifier_movsx.c
@@ -0,0 +1,213 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+#include "bpf_misc.h"
+
+#if defined(__TARGET_ARCH_x86) && __clang_major__ >= 18
+
+SEC("socket")
+__description("MOV32SX, S8")
+__success __success_unpriv __retval(0x23)
+__naked void mov32sx_s8(void)
+{
+ asm volatile (" \
+ w0 = 0xff23; \
+ w0 = (s8)w0; \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("MOV32SX, S16")
+__success __success_unpriv __retval(0xFFFFff23)
+__naked void mov32sx_s16(void)
+{
+ asm volatile (" \
+ w0 = 0xff23; \
+ w0 = (s16)w0; \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("MOV64SX, S8")
+__success __success_unpriv __retval(-2)
+__naked void mov64sx_s8(void)
+{
+ asm volatile (" \
+ r0 = 0x1fe; \
+ r0 = (s8)r0; \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("MOV64SX, S16")
+__success __success_unpriv __retval(0xf23)
+__naked void mov64sx_s16(void)
+{
+ asm volatile (" \
+ r0 = 0xf0f23; \
+ r0 = (s16)r0; \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("MOV64SX, S32")
+__success __success_unpriv __retval(-1)
+__naked void mov64sx_s32(void)
+{
+ asm volatile (" \
+ r0 = 0xfffffffe; \
+ r0 = (s32)r0; \
+ r0 >>= 1; \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("MOV32SX, S8, range_check")
+__success __success_unpriv __retval(1)
+__naked void mov32sx_s8_range(void)
+{
+ asm volatile (" \
+ call %[bpf_get_prandom_u32]; \
+ w1 = (s8)w0; \
+ /* w1 with s8 range */ \
+ if w1 s> 0x7f goto l0_%=; \
+ if w1 s< -0x80 goto l0_%=; \
+ r0 = 1; \
+l1_%=: \
+ exit; \
+l0_%=: \
+ r0 = 2; \
+ goto l1_%=; \
+" :
+ : __imm(bpf_get_prandom_u32)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("MOV32SX, S16, range_check")
+__success __success_unpriv __retval(1)
+__naked void mov32sx_s16_range(void)
+{
+ asm volatile (" \
+ call %[bpf_get_prandom_u32]; \
+ w1 = (s16)w0; \
+ /* w1 with s16 range */ \
+ if w1 s> 0x7fff goto l0_%=; \
+ if w1 s< -0x80ff goto l0_%=; \
+ r0 = 1; \
+l1_%=: \
+ exit; \
+l0_%=: \
+ r0 = 2; \
+ goto l1_%=; \
+" :
+ : __imm(bpf_get_prandom_u32)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("MOV32SX, S16, range_check 2")
+__success __success_unpriv __retval(1)
+__naked void mov32sx_s16_range_2(void)
+{
+ asm volatile (" \
+ r1 = 65535; \
+ w2 = (s16)w1; \
+ r2 >>= 1; \
+ if r2 != 0x7fffFFFF goto l0_%=; \
+ r0 = 1; \
+l1_%=: \
+ exit; \
+l0_%=: \
+ r0 = 0; \
+ goto l1_%=; \
+" :
+ : __imm(bpf_get_prandom_u32)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("MOV64SX, S8, range_check")
+__success __success_unpriv __retval(1)
+__naked void mov64sx_s8_range(void)
+{
+ asm volatile (" \
+ call %[bpf_get_prandom_u32]; \
+ r1 = (s8)r0; \
+ /* r1 with s8 range */ \
+ if r1 s> 0x7f goto l0_%=; \
+ if r1 s< -0x80 goto l0_%=; \
+ r0 = 1; \
+l1_%=: \
+ exit; \
+l0_%=: \
+ r0 = 2; \
+ goto l1_%=; \
+" :
+ : __imm(bpf_get_prandom_u32)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("MOV64SX, S16, range_check")
+__success __success_unpriv __retval(1)
+__naked void mov64sx_s16_range(void)
+{
+ asm volatile (" \
+ call %[bpf_get_prandom_u32]; \
+ r1 = (s16)r0; \
+ /* r1 with s16 range */ \
+ if r1 s> 0x7fff goto l0_%=; \
+ if r1 s< -0x8000 goto l0_%=; \
+ r0 = 1; \
+l1_%=: \
+ exit; \
+l0_%=: \
+ r0 = 2; \
+ goto l1_%=; \
+" :
+ : __imm(bpf_get_prandom_u32)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("MOV64SX, S32, range_check")
+__success __success_unpriv __retval(1)
+__naked void mov64sx_s32_range(void)
+{
+ asm volatile (" \
+ call %[bpf_get_prandom_u32]; \
+ r1 = (s32)r0; \
+ /* r1 with s32 range */ \
+ if r1 s> 0x7fffffff goto l0_%=; \
+ if r1 s< -0x80000000 goto l0_%=; \
+ r0 = 1; \
+l1_%=: \
+ exit; \
+l0_%=: \
+ r0 = 2; \
+ goto l1_%=; \
+" :
+ : __imm(bpf_get_prandom_u32)
+ : __clobber_all);
+}
+
+#else
+
+SEC("socket")
+__description("cpuv4 is not supported by compiler or jit, use a dummy test")
+__success
+int dummy_test(void)
+{
+ return 0;
+}
+
+#endif
+
+char _license[] SEC("license") = "GPL";
--
2.34.1
