Hi,
>
> This patch implements following new test cases:
> - test_call4: test case to verify if stack corruption occurs
> across with multiple function calls.
> - test_jump2: test case with a default packet in memory, parse
> the packet and check if dest ip is part of a subnet.
> - test_call5: test case with string data in the stack and
> calling string comaprision.
>
> Signed-off-by: Harman Kalra <hka...@marvell.com>
> ---
> app/test/test_bpf.c | 644 ++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 644 insertions(+)
>
> diff --git a/app/test/test_bpf.c b/app/test/test_bpf.c
> index e8841800a..c6b9819fc 100644
> --- a/app/test/test_bpf.c
> +++ b/app/test/test_bpf.c
> @@ -14,6 +14,8 @@
> #include <rte_byteorder.h>
> #include <rte_errno.h>
> #include <rte_bpf.h>
> +#include <rte_ether.h>
> +#include <rte_ip.h>
>
> #include "test.h"
>
> @@ -35,6 +37,12 @@ struct dummy_vect8 {
> struct dummy_offset out[8];
> };
>
> +struct dummy_net {
> + struct rte_ether_hdr eth_hdr;
> + struct rte_vlan_hdr vlan_hdr;
> + struct rte_ipv4_hdr ip_hdr;
> +};
> +
> #define TEST_FILL_1 0xDEADBEEF
>
> #define TEST_MUL_1 21
> @@ -54,6 +62,20 @@ struct dummy_vect8 {
> #define TEST_IMM_4 ((uint64_t)UINT32_MAX)
> #define TEST_IMM_5 ((uint64_t)UINT32_MAX + 1)
>
> +#define TEST_MEMFROB 0x2a2a2a2a
> +
> +#define STRING_GEEK 0x6B656567
> +#define STRING_WEEK 0x6B656577
> +
> +#define TEST_NETMASK 0xffffff00
> +#define TEST_SUBNET 0xaca80200
> +
> +uint8_t src_mac[] = { 0x00, 0xFF, 0xAA, 0xFF, 0xAA, 0xFF };
> +uint8_t dst_mac[] = { 0x00, 0xAA, 0xFF, 0xAA, 0xFF, 0xAA };
> +
> +uint32_t ip_src_addr = (172U << 24) | (168U << 16) | (2 << 8) | 1;
> +uint32_t ip_dst_addr = (172U << 24) | (168U << 16) | (2 << 8) | 2;
> +
> struct bpf_test {
> const char *name;
> size_t arg_sz;
> @@ -866,6 +888,181 @@ test_jump1_check(uint64_t rc, const void *arg)
> return cmp_res(__func__, rv, rc, &rv, &rc, sizeof(rv));
> }
>
> +/* Jump test case - check ip4_dest in particular subnet */
> +static const struct ebpf_insn test_jump2_prog[] = {
> +
> + [0] = {
> + .code = (EBPF_ALU64 | EBPF_MOV | BPF_K),
> + .dst_reg = EBPF_REG_2,
> + .imm = 0xe,
> + },
> + [1] = {
> + .code = (BPF_LDX | BPF_MEM | BPF_H),
> + .dst_reg = EBPF_REG_3,
> + .src_reg = EBPF_REG_1,
> + .off = 12,
> + },
> + [2] = {
> + .code = (BPF_JMP | EBPF_JNE | BPF_K),
> + .dst_reg = EBPF_REG_3,
> + .off = 2,
> + .imm = 0x81,
> + },
> + [3] = {
> + .code = (EBPF_ALU64 | EBPF_MOV | BPF_K),
> + .dst_reg = EBPF_REG_2,
> + .imm = 0x12,
> + },
> + [4] = {
> + .code = (BPF_LDX | BPF_MEM | BPF_H),
> + .dst_reg = EBPF_REG_3,
> + .src_reg = EBPF_REG_1,
> + .off = 16,
> + },
> + [5] = {
> + .code = (EBPF_ALU64 | BPF_AND | BPF_K),
> + .dst_reg = EBPF_REG_3,
> + .imm = 0xffff,
> + },
> + [6] = {
> + .code = (BPF_JMP | EBPF_JNE | BPF_K),
> + .dst_reg = EBPF_REG_3,
> + .off = 9,
> + .imm = 0x8,
> + },
> + [7] = {
> + .code = (EBPF_ALU64 | BPF_ADD | BPF_X),
> + .dst_reg = EBPF_REG_1,
> + .src_reg = EBPF_REG_2,
> + },
> + [8] = {
> + .code = (EBPF_ALU64 | EBPF_MOV | BPF_K),
> + .dst_reg = EBPF_REG_0,
> + .imm = 0,
> + },
> + [9] = {
> + .code = (BPF_LDX | BPF_MEM | BPF_W),
> + .dst_reg = EBPF_REG_1,
> + .src_reg = EBPF_REG_1,
> + .off = 16,
> + },
> + [10] = {
> + .code = (BPF_ALU | EBPF_MOV | BPF_K),
> + .dst_reg = EBPF_REG_3,
> + .imm = TEST_NETMASK,
> + },
> + [11] = {
> + .code = (BPF_ALU | EBPF_END | EBPF_TO_BE),
> + .dst_reg = EBPF_REG_3,
> + .imm = sizeof(uint32_t) * CHAR_BIT,
> + },
> + [12] = {
> + .code = (BPF_ALU | BPF_AND | BPF_X),
> + .dst_reg = EBPF_REG_1,
> + .src_reg = EBPF_REG_3,
> + },
> + [13] = {
> + .code = (BPF_ALU | EBPF_MOV | BPF_K),
> + .dst_reg = EBPF_REG_3,
> + .imm = TEST_SUBNET,
> + },
> + [14] = {
> + .code = (BPF_ALU | EBPF_END | EBPF_TO_BE),
> + .dst_reg = EBPF_REG_3,
> + .imm = sizeof(uint32_t) * CHAR_BIT,
> + },
> + [15] = {
> + .code = (BPF_JMP | BPF_JEQ | BPF_X),
> + .dst_reg = EBPF_REG_1,
> + .src_reg = EBPF_REG_3,
> + .off = 1,
> + },
> + [16] = {
> + .code = (EBPF_ALU64 | EBPF_MOV | BPF_K),
> + .dst_reg = EBPF_REG_0,
> + .imm = -1,
> + },
> + [17] = {
> + .code = (BPF_JMP | EBPF_EXIT),
> + },
> +};
> +
> +/* Preparing a vlan packet */
> +static void
> +test_jump2_prepare(void *arg)
> +{
> + struct dummy_net *dn;
> +
> + dn = arg;
> + memset(dn, 0, sizeof(*dn));
> +
> + /*
> + * Initialize ether header.
> + */
> + rte_ether_addr_copy((struct rte_ether_addr *)dst_mac,
> + &dn->eth_hdr.d_addr);
> + rte_ether_addr_copy((struct rte_ether_addr *)src_mac,
> + &dn->eth_hdr.s_addr);
> + dn->eth_hdr.ether_type = rte_cpu_to_be_16(RTE_ETHER_TYPE_VLAN);
> +
> + /*
> + * Initialize vlan header.
> + */
> + dn->vlan_hdr.eth_proto = rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV4);
> + dn->vlan_hdr.vlan_tci = 32;
> +
> + /*
> + * Initialize IP header.
> + */
> + dn->ip_hdr.version_ihl = 0x45; /*IP_VERSION | IP_HDRLEN*/
> + dn->ip_hdr.time_to_live = 64; /* IP_DEFTTL */
> + dn->ip_hdr.next_proto_id = IPPROTO_TCP;
> + dn->ip_hdr.packet_id = rte_cpu_to_be_16(0x463c);
> + dn->ip_hdr.total_length = rte_cpu_to_be_16(60);
> + dn->ip_hdr.src_addr = rte_cpu_to_be_32(ip_src_addr);
> + dn->ip_hdr.dst_addr = rte_cpu_to_be_32(ip_dst_addr);
> +}
> +
> +static int
> +test_jump2_check(uint64_t rc, const void *arg)
> +{
> + const struct rte_ether_hdr *eth_hdr = arg;
> + const struct rte_ipv4_hdr *ipv4_hdr;
> + const void *next = eth_hdr;
> + uint16_t eth_type;
> + uint64_t v = -1;
> +
> + if (eth_hdr->ether_type == htons(0x8100)) {
> + const struct rte_vlan_hdr *vlan_hdr =
> + (const void *)(eth_hdr + 1);
> + eth_type = vlan_hdr->eth_proto;
> + next = vlan_hdr + 1;
> + } else {
> + eth_type = eth_hdr->ether_type;
> + next = eth_hdr + 1;
> + }
> +
> + if (eth_type == htons(0x0800)) {
> + ipv4_hdr = next;
> + if ((ipv4_hdr->dst_addr & rte_cpu_to_be_32(TEST_NETMASK)) ==
> + rte_cpu_to_be_32(TEST_SUBNET)) {
> + v = 0;
> + }
> + }
> +
> + if (v != rc) {
> + printf("%s@%d: invalid return value "
> + "expected=0x%" PRIx64 ", actual=0x%" PRIx64 "\n",
> + __func__, __LINE__, v, rc);
> + return -1;
> + }
> +
> + if (v)
> + printf("Either IP not part of subnet or wrong ethertype\n");
Looks good to me in general, and obviously more tests are always welcome :)
Just one nit - I think it here and in other tests that you added it is better
to use cm_res() for results validation.
First - makes code more uniform, second cmp_res() does memcp() for whole
structs,
which helps to catch possible problems with silent data corruption, etc.
Konstantin
> +
> + return 0;
> +}
> +
> /* alu (add, sub, and, or, xor, neg) test-cases */
> static const struct ebpf_insn test_alu1_prog[] = {
>
> @@ -1889,6 +2086,403 @@ static const struct rte_bpf_xsym test_call3_xsym[] = {
> },
> };
>
> +/* Test for stack corruption in multiple function calls */
> +static const struct ebpf_insn test_call4_prog[] = {
> + {
> + .code = (BPF_ST | BPF_MEM | BPF_B),
> + .dst_reg = EBPF_REG_10,
> + .off = -4,
> + .imm = 1,
> + },
> + {
> + .code = (BPF_ST | BPF_MEM | BPF_B),
> + .dst_reg = EBPF_REG_10,
> + .off = -3,
> + .imm = 2,
> + },
> + {
> + .code = (BPF_ST | BPF_MEM | BPF_B),
> + .dst_reg = EBPF_REG_10,
> + .off = -2,
> + .imm = 3,
> + },
> + {
> + .code = (BPF_ST | BPF_MEM | BPF_B),
> + .dst_reg = EBPF_REG_10,
> + .off = -1,
> + .imm = 4,
> + },
> + {
> + .code = (EBPF_ALU64 | EBPF_MOV | BPF_X),
> + .dst_reg = EBPF_REG_1,
> + .src_reg = EBPF_REG_10,
> + },
> + {
> + .code = (EBPF_ALU64 | EBPF_MOV | BPF_K),
> + .dst_reg = EBPF_REG_2,
> + .imm = 4,
> + },
> + {
> + .code = (EBPF_ALU64 | BPF_SUB | BPF_X),
> + .dst_reg = EBPF_REG_1,
> + .src_reg = EBPF_REG_2,
> + },
> + {
> + .code = (BPF_JMP | EBPF_CALL),
> + .imm = 0,
> + },
> + {
> + .code = (BPF_LDX | BPF_MEM | BPF_B),
> + .dst_reg = EBPF_REG_1,
> + .src_reg = EBPF_REG_10,
> + .off = -4,
> + },
> + {
> + .code = (BPF_LDX | BPF_MEM | BPF_B),
> + .dst_reg = EBPF_REG_2,
> + .src_reg = EBPF_REG_10,
> + .off = -3,
> + },
> + {
> + .code = (BPF_LDX | BPF_MEM | BPF_B),
> + .dst_reg = EBPF_REG_3,
> + .src_reg = EBPF_REG_10,
> + .off = -2,
> + },
> + {
> + .code = (BPF_LDX | BPF_MEM | BPF_B),
> + .dst_reg = EBPF_REG_4,
> + .src_reg = EBPF_REG_10,
> + .off = -1,
> + },
> + {
> + .code = (BPF_JMP | EBPF_CALL),
> + .imm = 1,
> + },
> + {
> + .code = (EBPF_ALU64 | BPF_XOR | BPF_K),
> + .dst_reg = EBPF_REG_0,
> + .imm = TEST_MEMFROB,
> + },
> + {
> + .code = (BPF_JMP | EBPF_EXIT),
> + },
> +};
> +
> +/* Gathering the bytes together */
> +static uint32_t
> +dummy_func4_1(uint8_t a, uint8_t b, uint8_t c, uint8_t d)
> +{
> + return (a << 24) | (b << 16) | (c << 8) | (d << 0);
> +}
> +
> +/* Implementation of memfrob */
> +static uint32_t
> +dummy_func4_0(uint32_t *s, uint8_t n)
> +{
> + char *p = (char *) s;
> + while (n-- > 0)
> + *p++ ^= 42;
> + return *s;
> +}
> +
> +
> +static int
> +test_call4_check(uint64_t rc, const void *arg)
> +{
> + uint8_t a[4] = {1, 2, 3, 4};
> + uint32_t s, v = 0;
> +
> + RTE_SET_USED(arg);
> +
> + s = dummy_func4_0((uint32_t *)a, 4);
> +
> + s = dummy_func4_1(a[0], a[1], a[2], a[3]);
> +
> + v = s ^ TEST_MEMFROB;
> +
> + if (v != rc) {
> + printf("%s@%d: invalid return value "
> + "expected=0x%" PRIx32 ", actual=0x%" PRIx64 "\n",
> + __func__, __LINE__, v, rc);
> + return -1;
> + }
> + return 0;
> +}
> +
> +static const struct rte_bpf_xsym test_call4_xsym[] = {
> + [0] = {
> + .name = RTE_STR(dummy_func4_0),
> + .type = RTE_BPF_XTYPE_FUNC,
> + .func = {
> + .val = (void *)dummy_func4_0,
> + .nb_args = 2,
> + .args = {
> + [0] = {
> + .type = RTE_BPF_ARG_PTR,
> + .size = 4 * sizeof(uint8_t),
> + },
> + [1] = {
> + .type = RTE_BPF_ARG_RAW,
> + .size = sizeof(uint8_t),
> + },
> + },
> + .ret = {
> + .type = RTE_BPF_ARG_RAW,
> + .size = sizeof(uint32_t),
> + },
> + },
> + },
> + [1] = {
> + .name = RTE_STR(dummy_func4_1),
> + .type = RTE_BPF_XTYPE_FUNC,
> + .func = {
> + .val = (void *)dummy_func4_1,
> + .nb_args = 4,
> + .args = {
> + [0] = {
> + .type = RTE_BPF_ARG_RAW,
> + .size = sizeof(uint8_t),
> + },
> + [1] = {
> + .type = RTE_BPF_ARG_RAW,
> + .size = sizeof(uint8_t),
> + },
> + [2] = {
> + .type = RTE_BPF_ARG_RAW,
> + .size = sizeof(uint8_t),
> + },
> + [3] = {
> + .type = RTE_BPF_ARG_RAW,
> + .size = sizeof(uint8_t),
> + },
> + },
> + .ret = {
> + .type = RTE_BPF_ARG_RAW,
> + .size = sizeof(uint32_t),
> + },
> + },
> + },
> +};
> +
> +/* string compare test case */
> +static const struct ebpf_insn test_call5_prog[] = {
> +
> + [0] = {
> + .code = (EBPF_ALU64 | EBPF_MOV | BPF_K),
> + .dst_reg = EBPF_REG_1,
> + .imm = STRING_GEEK,
> + },
> + [1] = {
> + .code = (BPF_STX | BPF_MEM | BPF_W),
> + .dst_reg = EBPF_REG_10,
> + .src_reg = EBPF_REG_1,
> + .off = -8,
> + },
> + [2] = {
> + .code = (EBPF_ALU64 | EBPF_MOV | BPF_K),
> + .dst_reg = EBPF_REG_6,
> + .imm = 0,
> + },
> + [3] = {
> + .code = (BPF_STX | BPF_MEM | BPF_B),
> + .dst_reg = EBPF_REG_10,
> + .src_reg = EBPF_REG_6,
> + .off = -4,
> + },
> + [4] = {
> + .code = (BPF_STX | BPF_MEM | BPF_W),
> + .dst_reg = EBPF_REG_10,
> + .src_reg = EBPF_REG_6,
> + .off = -12,
> + },
> + [5] = {
> + .code = (EBPF_ALU64 | EBPF_MOV | BPF_K),
> + .dst_reg = EBPF_REG_1,
> + .imm = STRING_WEEK,
> + },
> + [6] = {
> + .code = (BPF_STX | BPF_MEM | BPF_W),
> + .dst_reg = EBPF_REG_10,
> + .src_reg = EBPF_REG_1,
> + .off = -16,
> + },
> + [7] = {
> + .code = (EBPF_ALU64 | EBPF_MOV | BPF_X),
> + .dst_reg = EBPF_REG_1,
> + .src_reg = EBPF_REG_10,
> + },
> + [8] = {
> + .code = (EBPF_ALU64 | BPF_ADD | BPF_K),
> + .dst_reg = EBPF_REG_1,
> + .imm = -8,
> + },
> + [9] = {
> + .code = (EBPF_ALU64 | EBPF_MOV | BPF_X),
> + .dst_reg = EBPF_REG_2,
> + .src_reg = EBPF_REG_1,
> + },
> + [10] = {
> + .code = (BPF_JMP | EBPF_CALL),
> + .imm = 0,
> + },
> + [11] = {
> + .code = (EBPF_ALU64 | EBPF_MOV | BPF_X),
> + .dst_reg = EBPF_REG_1,
> + .src_reg = EBPF_REG_0,
> + },
> + [12] = {
> + .code = (BPF_ALU | EBPF_MOV | BPF_K),
> + .dst_reg = EBPF_REG_0,
> + .imm = -1,
> + },
> + [13] = {
> + .code = (EBPF_ALU64 | BPF_LSH | BPF_K),
> + .dst_reg = EBPF_REG_1,
> + .imm = 0x20,
> + },
> + [14] = {
> + .code = (EBPF_ALU64 | BPF_RSH | BPF_K),
> + .dst_reg = EBPF_REG_1,
> + .imm = 0x20,
> + },
> + [15] = {
> + .code = (BPF_JMP | EBPF_JNE | BPF_K),
> + .dst_reg = EBPF_REG_1,
> + .off = 11,
> + .imm = 0,
> + },
> + [16] = {
> + .code = (EBPF_ALU64 | EBPF_MOV | BPF_X),
> + .dst_reg = EBPF_REG_1,
> + .src_reg = EBPF_REG_10,
> + },
> + [17] = {
> + .code = (EBPF_ALU64 | BPF_ADD | BPF_K),
> + .dst_reg = EBPF_REG_1,
> + .imm = -8,
> + },
> + [18] = {
> + .code = (EBPF_ALU64 | EBPF_MOV | BPF_X),
> + .dst_reg = EBPF_REG_2,
> + .src_reg = EBPF_REG_10,
> + },
> + [19] = {
> + .code = (EBPF_ALU64 | BPF_ADD | BPF_K),
> + .dst_reg = EBPF_REG_2,
> + .imm = -16,
> + },
> + [20] = {
> + .code = (BPF_JMP | EBPF_CALL),
> + .imm = 0,
> + },
> + [21] = {
> + .code = (EBPF_ALU64 | EBPF_MOV | BPF_X),
> + .dst_reg = EBPF_REG_1,
> + .src_reg = EBPF_REG_0,
> + },
> + [22] = {
> + .code = (EBPF_ALU64 | BPF_LSH | BPF_K),
> + .dst_reg = EBPF_REG_1,
> + .imm = 0x20,
> + },
> + [23] = {
> + .code = (EBPF_ALU64 | BPF_RSH | BPF_K),
> + .dst_reg = EBPF_REG_1,
> + .imm = 0x20,
> + },
> + [24] = {
> + .code = (EBPF_ALU64 | EBPF_MOV | BPF_X),
> + .dst_reg = EBPF_REG_0,
> + .src_reg = EBPF_REG_1,
> + },
> + [25] = {
> + .code = (BPF_JMP | BPF_JEQ | BPF_X),
> + .dst_reg = EBPF_REG_1,
> + .src_reg = EBPF_REG_6,
> + .off = 1,
> + },
> + [26] = {
> + .code = (EBPF_ALU64 | EBPF_MOV | BPF_K),
> + .dst_reg = EBPF_REG_0,
> + .imm = 0,
> + },
> + [27] = {
> + .code = (BPF_JMP | EBPF_EXIT),
> + },
> +};
> +
> +/* String comparision impelementation, return 0 if equal else difference */
> +static uint32_t
> +dummy_func5(const char *s1, const char *s2)
> +{
> + while (*s1 && (*s1 == *s2)) {
> + s1++;
> + s2++;
> + }
> + return *(const unsigned char *)s1 - *(const unsigned char *)s2;
> +}
> +
> +static int
> +test_call5_check(uint64_t rc, const void *arg)
> +{
> + char a[] = "geek";
> + char b[] = "week";
> + uint32_t v;
> +
> + RTE_SET_USED(arg);
> +
> + v = dummy_func5(a, a);
> + if (v != 0) {
> + v = -1;
> + goto fail;
> + }
> +
> + v = dummy_func5(a, b);
> + if (v == 0)
> + goto fail;
> +
> + v = 0;
> +
> +fail:
> + if (v != rc) {
> + printf("%s@%d: invalid return value "
> + "expected=0x%" PRIx32 ", actual=0x%" PRIx64 "\n",
> + __func__, __LINE__, v, rc);
> + return -1;
> + }
> +
> + if (v)
> + printf("String comparision test failed\n");
> +
> + return 0;
> +}
> +
> +static const struct rte_bpf_xsym test_call5_xsym[] = {
> + [0] = {
> + .name = RTE_STR(dummy_func5),
> + .type = RTE_BPF_XTYPE_FUNC,
> + .func = {
> + .val = (void *)dummy_func5,
> + .nb_args = 2,
> + .args = {
> + [0] = {
> + .type = RTE_BPF_ARG_PTR,
> + .size = sizeof(char),
> + },
> + [1] = {
> + .type = RTE_BPF_ARG_PTR,
> + .size = sizeof(char),
> + },
> + },
> + .ret = {
> + .type = RTE_BPF_ARG_RAW,
> + .size = sizeof(uint32_t),
> + },
> + },
> + },
> +};
> +
> static const struct bpf_test tests[] = {
> {
> .name = "test_store1",
> @@ -1988,6 +2582,20 @@ static const struct bpf_test tests[] = {
> .prepare = test_jump1_prepare,
> .check_result = test_jump1_check,
> },
> + {
> + .name = "test_jump2",
> + .arg_sz = sizeof(struct dummy_net),
> + .prm = {
> + .ins = test_jump2_prog,
> + .nb_ins = RTE_DIM(test_jump2_prog),
> + .prog_arg = {
> + .type = RTE_BPF_ARG_PTR,
> + .size = sizeof(struct dummy_net),
> + },
> + },
> + .prepare = test_jump2_prepare,
> + .check_result = test_jump2_check,
> + },
> {
> .name = "test_alu1",
> .arg_sz = sizeof(struct dummy_vect8),
> @@ -2098,6 +2706,42 @@ static const struct bpf_test tests[] = {
> /* for now don't support function calls on 32 bit platform */
> .allow_fail = (sizeof(uint64_t) != sizeof(uintptr_t)),
> },
> + {
> + .name = "test_call4",
> + .arg_sz = sizeof(struct dummy_offset),
> + .prm = {
> + .ins = test_call4_prog,
> + .nb_ins = RTE_DIM(test_call4_prog),
> + .prog_arg = {
> + .type = RTE_BPF_ARG_PTR,
> + .size = 2 * sizeof(struct dummy_offset),
> + },
> + .xsym = test_call4_xsym,
> + .nb_xsym = RTE_DIM(test_call4_xsym),
> + },
> + .prepare = test_store1_prepare,
> + .check_result = test_call4_check,
> + /* for now don't support function calls on 32 bit platform */
> + .allow_fail = (sizeof(uint64_t) != sizeof(uintptr_t)),
> + },
> + {
> + .name = "test_call5",
> + .arg_sz = sizeof(struct dummy_offset),
> + .prm = {
> + .ins = test_call5_prog,
> + .nb_ins = RTE_DIM(test_call5_prog),
> + .prog_arg = {
> + .type = RTE_BPF_ARG_PTR,
> + .size = sizeof(struct dummy_offset),
> + },
> + .xsym = test_call5_xsym,
> + .nb_xsym = RTE_DIM(test_call5_xsym),
> + },
> + .prepare = test_store1_prepare,
> + .check_result = test_call5_check,
> + /* for now don't support function calls on 32 bit platform */
> + .allow_fail = (sizeof(uint64_t) != sizeof(uintptr_t)),
> + },
> };
>
> static int
> --
> 2.18.0
