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

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

struct {
        __uint(type, BPF_MAP_TYPE_HASH);
        __uint(max_entries, 1);
        __type(key, long long);
        __type(value, long long);
} map_hash_8b SEC(".maps");

SEC("raw_tracepoint.w")
__description("raw_tracepoint_writable: reject variable offset")
__failure
__msg("R6 invalid variable buffer offset: off=0, var_off=(0x0; 0xffffffff)")
__flag(BPF_F_ANY_ALIGNMENT)
__naked void tracepoint_writable_reject_variable_offset(void)
{
        asm volatile ("                                 \
        /* r6 is our tp buffer */                       \
        r6 = *(u64*)(r1 + 0);                           \
        r1 = %[map_hash_8b] ll;                         \
        /* move the key (== 0) to r10-8 */              \
        w0 = 0;                                         \
        r2 = r10;                                       \
        r2 += -8;                                       \
        *(u64*)(r2 + 0) = r0;                           \
        /* lookup in the map */                         \
        call %[bpf_map_lookup_elem];                    \
        /* exit clean if null */                        \
        if r0 != 0 goto l0_%=;                          \
        exit;                                           \
l0_%=:  /* shift the buffer pointer to a variable location */\
        r0 = *(u32*)(r0 + 0);                           \
        r6 += r0;                                       \
        /* clobber whatever's there */                  \
        r7 = 4242;                                      \
        *(u64*)(r6 + 0) = r7;                           \
        r0 = 0;                                         \
        exit;                                           \
"       :
        : __imm(bpf_map_lookup_elem),
          __imm_addr(map_hash_8b)
        : __clobber_all);
}

SEC("raw_tracepoint.w")
__description("raw_tracepoint_writable: reject negative const offset")
__failure
__msg("invalid negative tracepoint buffer offset")
__naked void tracepoint_writable_reject_negative_const_offset(void)
{
        asm volatile ("                                 \
        r6 = *(u64 *)(r1 + 0);                          \
        r6 += -8;                                       \
        r0 = *(u64 *)(r6 + 0);                          \
        exit;                                           \
"       :
        :
        : __clobber_all);
}

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