// SPDX-License-Identifier: GPL-2.0
/* Converted from tools/testing/selftests/bpf/verifier/bpf_get_stack.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_ARRAY);
        __uint(max_entries, 1);
        __type(key, int);
        __type(value, struct test_val);
} map_array_48b SEC(".maps");

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("tracepoint")
__description("bpf_get_stack return R0 within range")
__success
__naked void stack_return_r0_within_range(void)
{
        asm volatile ("                                 \
        r6 = r1;                                        \
        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_%=;                          \
        r7 = r0;                                        \
        r9 = %[__imm_0];                                \
        r1 = r6;                                        \
        r2 = r7;                                        \
        r3 = %[__imm_0];                                \
        r4 = 256;                                       \
        call %[bpf_get_stack];                          \
        r1 = 0;                                         \
        r8 = r0;                                        \
        r8 <<= 32;                                      \
        r8 s>>= 32;                                     \
        if r1 s> r8 goto l0_%=;                         \
        r9 -= r8;                                       \
        r2 = r7;                                        \
        r2 += r8;                                       \
        r1 = r9;                                        \
        r1 <<= 32;                                      \
        r1 s>>= 32;                                     \
        r3 = r2;                                        \
        r3 += r1;                                       \
        r1 = r7;                                        \
        r5 = %[__imm_0];                                \
        r1 += r5;                                       \
        if r3 >= r1 goto l0_%=;                         \
        r1 = r6;                                        \
        r3 = r9;                                        \
        r4 = 0;                                         \
        call %[bpf_get_stack];                          \
l0_%=:  exit;                                           \
"       :
        : __imm(bpf_get_stack),
          __imm(bpf_map_lookup_elem),
          __imm_addr(map_hash_48b),
          __imm_const(__imm_0, sizeof(struct test_val) / 2)
        : __clobber_all);
}

SEC("iter/task")
__description("bpf_get_task_stack return R0 range is refined")
__success
__naked void return_r0_range_is_refined(void)
{
        asm volatile ("                                 \
        r6 = *(u64*)(r1 + 0);                           \
        r6 = *(u64*)(r6 + 0);           /* ctx->meta->seq */\
        r7 = *(u64*)(r1 + 8);           /* ctx->task */\
        r1 = %[map_array_48b] ll;       /* fixup_map_array_48b */\
        r2 = 0;                                         \
        *(u64*)(r10 - 8) = r2;                          \
        r2 = r10;                                       \
        r2 += -8;                                       \
        call %[bpf_map_lookup_elem];                    \
        if r0 != 0 goto l0_%=;                          \
        r0 = 0;                                         \
        exit;                                           \
l0_%=:  if r7 != 0 goto l1_%=;                          \
        r0 = 0;                                         \
        exit;                                           \
l1_%=:  r1 = r7;                                        \
        r2 = r0;                                        \
        r9 = r0;                        /* keep buf for seq_write */\
        r3 = 48;                                        \
        r4 = 0;                                         \
        call %[bpf_get_task_stack];                     \
        if r0 s> 0 goto l2_%=;                          \
        r0 = 0;                                         \
        exit;                                           \
l2_%=:  r1 = r6;                                        \
        r2 = r9;                                        \
        r3 = r0;                                        \
        call %[bpf_seq_write];                          \
        r0 = 0;                                         \
        exit;                                           \
"       :
        : __imm(bpf_get_task_stack),
          __imm(bpf_map_lookup_elem),
          __imm(bpf_seq_write),
          __imm_addr(map_array_48b)
        : __clobber_all);
}

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