From: Alexei Starovoitov <ast@xxxxxxxxxx> Add asm tests for register allocator tracking logic implemented in the patches: https://lore.kernel.org/bpf/20201006200955.12350-1-alexei.starovoitov@xxxxxxxxx/T/#t Signed-off-by: Alexei Starovoitov <ast@xxxxxxxxxx> --- .../testing/selftests/bpf/verifier/regalloc.c | 159 ++++++++++++++++++ 1 file changed, 159 insertions(+) create mode 100644 tools/testing/selftests/bpf/verifier/regalloc.c diff --git a/tools/testing/selftests/bpf/verifier/regalloc.c b/tools/testing/selftests/bpf/verifier/regalloc.c new file mode 100644 index 000000000000..e9b6c6fdecd2 --- /dev/null +++ b/tools/testing/selftests/bpf/verifier/regalloc.c @@ -0,0 +1,159 @@ +{ + "regalloc 1", + .insns = { + BPF_MOV64_REG(BPF_REG_6, BPF_REG_1), + BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0), + BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8), + BPF_LD_MAP_FD(BPF_REG_1, 0), + BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem), + BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 8), + BPF_MOV64_REG(BPF_REG_7, BPF_REG_0), + BPF_EMIT_CALL(BPF_FUNC_get_prandom_u32), + BPF_MOV64_REG(BPF_REG_2, BPF_REG_0), + BPF_JMP_IMM(BPF_JSGT, BPF_REG_0, 20, 4), + BPF_JMP_IMM(BPF_JSLT, BPF_REG_2, 0, 3), + BPF_ALU64_REG(BPF_ADD, BPF_REG_7, BPF_REG_0), + BPF_ALU64_REG(BPF_ADD, BPF_REG_7, BPF_REG_2), + BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_7, 0), + BPF_EXIT_INSN(), + }, + .fixup_map_hash_48b = { 4 }, + .result = ACCEPT, + .prog_type = BPF_PROG_TYPE_TRACEPOINT, +}, +{ + "regalloc 2", + .insns = { + BPF_MOV64_REG(BPF_REG_6, BPF_REG_1), + BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0), + BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8), + BPF_LD_MAP_FD(BPF_REG_1, 0), + BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem), + BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 8), + BPF_MOV64_REG(BPF_REG_7, BPF_REG_0), + BPF_EMIT_CALL(BPF_FUNC_get_prandom_u32), + BPF_MOV64_REG(BPF_REG_2, BPF_REG_0), + BPF_JMP_IMM(BPF_JSGT, BPF_REG_0, 24, 4), + BPF_JMP_IMM(BPF_JSLT, BPF_REG_2, 0, 3), + BPF_ALU64_REG(BPF_ADD, BPF_REG_7, BPF_REG_0), + BPF_ALU64_REG(BPF_ADD, BPF_REG_7, BPF_REG_2), + BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_7, 0), + BPF_EXIT_INSN(), + }, + .fixup_map_hash_48b = { 4 }, + .result = REJECT, + .errstr = "invalid access to map value, value_size=48 off=48 size=1", + .prog_type = BPF_PROG_TYPE_TRACEPOINT, +}, +{ + "regalloc 3", + .insns = { + BPF_MOV64_REG(BPF_REG_6, BPF_REG_1), + BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0), + BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8), + BPF_LD_MAP_FD(BPF_REG_1, 0), + BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem), + BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 9), + BPF_MOV64_REG(BPF_REG_7, BPF_REG_0), + BPF_EMIT_CALL(BPF_FUNC_get_prandom_u32), + BPF_MOV64_REG(BPF_REG_2, BPF_REG_0), + BPF_JMP_IMM(BPF_JSGT, BPF_REG_0, 20, 5), + BPF_MOV64_IMM(BPF_REG_3, 0), + BPF_JMP_REG(BPF_JSGE, BPF_REG_3, BPF_REG_2, 3), + BPF_ALU64_REG(BPF_ADD, BPF_REG_7, BPF_REG_0), + BPF_ALU64_REG(BPF_ADD, BPF_REG_7, BPF_REG_2), + BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_7, 0), + BPF_EXIT_INSN(), + }, + .fixup_map_hash_48b = { 4 }, + .result = ACCEPT, + .prog_type = BPF_PROG_TYPE_TRACEPOINT, +}, +{ + "regalloc 4", + .insns = { + BPF_MOV64_REG(BPF_REG_6, BPF_REG_1), + BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0), + BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8), + BPF_LD_MAP_FD(BPF_REG_1, 0), + BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem), + BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 9), + BPF_MOV64_REG(BPF_REG_7, BPF_REG_0), + BPF_EMIT_CALL(BPF_FUNC_get_prandom_u32), + BPF_MOV64_REG(BPF_REG_2, BPF_REG_0), + BPF_JMP_IMM(BPF_JSGT, BPF_REG_0, 22, 5), + BPF_MOV64_IMM(BPF_REG_3, 0), + BPF_JMP_REG(BPF_JSGE, BPF_REG_3, BPF_REG_2, 3), + BPF_ALU64_REG(BPF_ADD, BPF_REG_7, BPF_REG_0), + BPF_ALU64_REG(BPF_ADD, BPF_REG_7, BPF_REG_2), + BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_7, 0), + BPF_EXIT_INSN(), + }, + .fixup_map_hash_48b = { 4 }, + .result = REJECT, + .errstr = "invalid access to map value, value_size=48 off=44 size=8", + .prog_type = BPF_PROG_TYPE_TRACEPOINT, +}, +{ + "regalloc 5", + .insns = { + BPF_MOV64_REG(BPF_REG_6, BPF_REG_1), + BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0), + BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8), + BPF_LD_MAP_FD(BPF_REG_1, 0), + BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem), + BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 11), + BPF_MOV64_REG(BPF_REG_7, BPF_REG_0), + BPF_EMIT_CALL(BPF_FUNC_get_prandom_u32), + BPF_MOV64_REG(BPF_REG_2, BPF_REG_0), + BPF_JMP_IMM(BPF_JSGT, BPF_REG_0, 20, 7), + /* r0 has upper bound that should propagate into r2 */ + BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_2, -8), /* spill r2 */ + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_MOV64_IMM(BPF_REG_2, 0), /* clear r0 and r2 */ + BPF_LDX_MEM(BPF_DW, BPF_REG_3, BPF_REG_10, -8), /* fill r3 */ + BPF_JMP_REG(BPF_JSGE, BPF_REG_0, BPF_REG_3, 2), + /* r3 has lower and upper bounds */ + BPF_ALU64_REG(BPF_ADD, BPF_REG_7, BPF_REG_3), + BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_7, 0), + BPF_EXIT_INSN(), + }, + .fixup_map_hash_48b = { 4 }, + .result = ACCEPT, + .prog_type = BPF_PROG_TYPE_TRACEPOINT, +}, +{ + "regalloc 6", + .insns = { + BPF_MOV64_REG(BPF_REG_6, BPF_REG_1), + BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0), + BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8), + BPF_LD_MAP_FD(BPF_REG_1, 0), + BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem), + BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 11), + BPF_MOV64_REG(BPF_REG_7, BPF_REG_0), + BPF_EMIT_CALL(BPF_FUNC_get_prandom_u32), + BPF_MOV64_REG(BPF_REG_2, BPF_REG_0), + BPF_JMP_IMM(BPF_JSGT, BPF_REG_0, 48, 7), + /* r0 has upper bound that should propagate into r2 */ + BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_2, -8), /* spill r2 */ + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_MOV64_IMM(BPF_REG_2, 0), /* clear r0 and r2 */ + BPF_LDX_MEM(BPF_DW, BPF_REG_3, BPF_REG_10, -8), /* fill r3 */ + BPF_JMP_REG(BPF_JSGE, BPF_REG_0, BPF_REG_3, 2), + /* r3 has lower and upper bounds */ + BPF_ALU64_REG(BPF_ADD, BPF_REG_7, BPF_REG_3), + BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_7, 0), + BPF_EXIT_INSN(), + }, + .fixup_map_hash_48b = { 4 }, + .result = REJECT, + .errstr = "invalid access to map value, value_size=48 off=48 size=8", + .prog_type = BPF_PROG_TYPE_TRACEPOINT, +}, -- 2.23.0
