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Diffstat (limited to 'tools/testing/selftests/bpf/verifier/atomic_and.c')
-rw-r--r--tools/testing/selftests/bpf/verifier/atomic_and.c77
1 files changed, 77 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/verifier/atomic_and.c b/tools/testing/selftests/bpf/verifier/atomic_and.c
new file mode 100644
index 000000000000..1bdc8e6684f7
--- /dev/null
+++ b/tools/testing/selftests/bpf/verifier/atomic_and.c
@@ -0,0 +1,77 @@
+{
+ "BPF_ATOMIC_AND without fetch",
+ .insns = {
+ /* val = 0x110; */
+ BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0x110),
+ /* atomic_and(&val, 0x011); */
+ BPF_MOV64_IMM(BPF_REG_1, 0x011),
+ BPF_ATOMIC_OP(BPF_DW, BPF_AND, BPF_REG_10, BPF_REG_1, -8),
+ /* if (val != 0x010) exit(2); */
+ BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0x010, 2),
+ BPF_MOV64_IMM(BPF_REG_0, 2),
+ BPF_EXIT_INSN(),
+ /* r1 should not be clobbered, no BPF_FETCH flag */
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0x011, 1),
+ BPF_MOV64_IMM(BPF_REG_0, 1),
+ BPF_EXIT_INSN(),
+ },
+ .result = ACCEPT,
+},
+{
+ "BPF_ATOMIC_AND with fetch",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 123),
+ /* val = 0x110; */
+ BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0x110),
+ /* old = atomic_fetch_and(&val, 0x011); */
+ BPF_MOV64_IMM(BPF_REG_1, 0x011),
+ BPF_ATOMIC_OP(BPF_DW, BPF_AND | BPF_FETCH, BPF_REG_10, BPF_REG_1, -8),
+ /* if (old != 0x110) exit(3); */
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0x110, 2),
+ BPF_MOV64_IMM(BPF_REG_0, 3),
+ BPF_EXIT_INSN(),
+ /* if (val != 0x010) exit(2); */
+ BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_10, -8),
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0x010, 2),
+ BPF_MOV64_IMM(BPF_REG_1, 2),
+ BPF_EXIT_INSN(),
+ /* Check R0 wasn't clobbered (for fear of x86 JIT bug) */
+ BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 123, 2),
+ BPF_MOV64_IMM(BPF_REG_0, 1),
+ BPF_EXIT_INSN(),
+ /* exit(0); */
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .result = ACCEPT,
+},
+{
+ "BPF_ATOMIC_AND with fetch 32bit",
+ .insns = {
+ /* r0 = (s64) -1 */
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_ALU64_IMM(BPF_SUB, BPF_REG_0, 1),
+ /* val = 0x110; */
+ BPF_ST_MEM(BPF_W, BPF_REG_10, -4, 0x110),
+ /* old = atomic_fetch_and(&val, 0x011); */
+ BPF_MOV32_IMM(BPF_REG_1, 0x011),
+ BPF_ATOMIC_OP(BPF_W, BPF_AND | BPF_FETCH, BPF_REG_10, BPF_REG_1, -4),
+ /* if (old != 0x110) exit(3); */
+ BPF_JMP32_IMM(BPF_JEQ, BPF_REG_1, 0x110, 2),
+ BPF_MOV32_IMM(BPF_REG_0, 3),
+ BPF_EXIT_INSN(),
+ /* if (val != 0x010) exit(2); */
+ BPF_LDX_MEM(BPF_W, BPF_REG_1, BPF_REG_10, -4),
+ BPF_JMP32_IMM(BPF_JEQ, BPF_REG_1, 0x010, 2),
+ BPF_MOV32_IMM(BPF_REG_1, 2),
+ BPF_EXIT_INSN(),
+ /* Check R0 wasn't clobbered (for fear of x86 JIT bug)
+ * It should be -1 so add 1 to get exit code.
+ */
+ BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 1),
+ BPF_EXIT_INSN(),
+ },
+ .result = ACCEPT,
+},