// SPDX-License-Identifier: GPL-2.0
/* Converted from tools/testing/selftests/bpf/verifier/and.c */

#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include "bpf_misc.h"

#define MAX_ENTRIES 11

struct test_val {
        unsigned int index;
        int foo[MAX_ENTRIES];
};

struct {
        __uint(type, BPF_MAP_TYPE_HASH);
        __uint(max_entries, 1);
        __type(key, long long);
        __type(value, struct test_val);
} map_hash_48b SEC(".maps");

SEC("socket")
__description("invalid and of negative number")
__failure __msg("R0 max value is outside of the allowed memory range")
__failure_unpriv
__flag(BPF_F_ANY_ALIGNMENT)
__naked void invalid_and_of_negative_number(void)
{
        asm volatile ("                                 \
        r1 = 0;                                         \
        *(u64*)(r10 - 8) = r1;                          \
        r2 = r10;                                       \
        r2 += -8;                                       \
        r1 = %[map_hash_48b] ll;                        \
        call %[bpf_map_lookup_elem];                    \
        if r0 == 0 goto l0_%=;                          \
        r1 = *(u8*)(r0 + 0);                            \
        r1 &= -4;                                       \
        r1 <<= 2;                                       \
        r0 += r1;                                       \
l0_%=:  r1 = %[test_val_foo];                           \
        *(u64*)(r0 + 0) = r1;                           \
        exit;                                           \
"       :
        : __imm(bpf_map_lookup_elem),
          __imm_addr(map_hash_48b),
          __imm_const(test_val_foo, offsetof(struct test_val, foo))
        : __clobber_all);
}

SEC("socket")
__description("invalid range check")
__failure __msg("R0 max value is outside of the allowed memory range")
__failure_unpriv
__flag(BPF_F_ANY_ALIGNMENT)
__naked void invalid_range_check(void)
{
        asm volatile ("                                 \
        r1 = 0;                                         \
        *(u64*)(r10 - 8) = r1;                          \
        r2 = r10;                                       \
        r2 += -8;                                       \
        r1 = %[map_hash_48b] ll;                        \
        call %[bpf_map_lookup_elem];                    \
        if r0 == 0 goto l0_%=;                          \
        r1 = *(u32*)(r0 + 0);                           \
        r9 = 1;                                         \
        w1 %%= 2;                                       \
        w1 += 1;                                        \
        w9 &= w1;                                       \
        w9 += 1;                                        \
        w9 >>= 1;                                       \
        w3 = 1;                                         \
        w3 -= w9;                                       \
        w3 *= 0x10000000;                               \
        r0 += r3;                                       \
        *(u32*)(r0 + 0) = r3;                           \
l0_%=:  r0 = r0;                                        \
        exit;                                           \
"       :
        : __imm(bpf_map_lookup_elem),
          __imm_addr(map_hash_48b)
        : __clobber_all);
}

SEC("socket")
__description("check known subreg with unknown reg")
__success __success_unpriv
__retval(0)
#ifdef SPEC_V1
__xlated_unpriv("if w0 < 0x1 goto pc+2")
__xlated_unpriv("nospec") /* inserted to prevent `R1 !read_ok'` */
__xlated_unpriv("goto pc-1") /* `r1 = *(u32*)(r1 + 512)`, sanitized dead code */
__xlated_unpriv("r0 = 0")
#endif
__naked void known_subreg_with_unknown_reg(void)
{
        asm volatile ("                                 \
        call %[bpf_get_prandom_u32];                    \
        r0 <<= 32;                                      \
        r0 += 1;                                        \
        r0 &= 0xFFFF1234;                               \
        /* Upper bits are unknown but AND above masks out 1 zero'ing lower bits */\
        if w0 < 1 goto l0_%=;                           \
        r1 = *(u32*)(r1 + 512);                         \
l0_%=:  r0 = 0;                                         \
        exit;                                           \
"       :
        : __imm(bpf_get_prandom_u32)
        : __clobber_all);
}

char _license[] SEC("license") = "GPL";