125 lines
2.7 KiB
C
125 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Converted from tools/testing/selftests/bpf/verifier/bpf_get_stack.c */
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#include <linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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#include "bpf_misc.h"
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#define MAX_ENTRIES 11
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struct test_val {
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unsigned int index;
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int foo[MAX_ENTRIES];
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};
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struct {
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__uint(type, BPF_MAP_TYPE_ARRAY);
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__uint(max_entries, 1);
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__type(key, int);
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__type(value, struct test_val);
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} map_array_48b SEC(".maps");
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struct {
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__uint(type, BPF_MAP_TYPE_HASH);
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__uint(max_entries, 1);
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__type(key, long long);
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__type(value, struct test_val);
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} map_hash_48b SEC(".maps");
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SEC("tracepoint")
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__description("bpf_get_stack return R0 within range")
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__success
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__naked void stack_return_r0_within_range(void)
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{
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asm volatile (" \
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r6 = r1; \
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r1 = 0; \
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*(u64*)(r10 - 8) = r1; \
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r2 = r10; \
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r2 += -8; \
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r1 = %[map_hash_48b] ll; \
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call %[bpf_map_lookup_elem]; \
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if r0 == 0 goto l0_%=; \
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r7 = r0; \
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r9 = %[__imm_0]; \
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r1 = r6; \
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r2 = r7; \
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r3 = %[__imm_0]; \
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r4 = 256; \
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call %[bpf_get_stack]; \
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r1 = 0; \
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r8 = r0; \
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r8 <<= 32; \
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r8 s>>= 32; \
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if r1 s> r8 goto l0_%=; \
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r9 -= r8; \
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r2 = r7; \
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r2 += r8; \
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r1 = r9; \
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r1 <<= 32; \
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r1 s>>= 32; \
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r3 = r2; \
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r3 += r1; \
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r1 = r7; \
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r5 = %[__imm_0]; \
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r1 += r5; \
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if r3 >= r1 goto l0_%=; \
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r1 = r6; \
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r3 = r9; \
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r4 = 0; \
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call %[bpf_get_stack]; \
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l0_%=: exit; \
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" :
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: __imm(bpf_get_stack),
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__imm(bpf_map_lookup_elem),
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__imm_addr(map_hash_48b),
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__imm_const(__imm_0, sizeof(struct test_val) / 2)
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: __clobber_all);
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}
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SEC("iter/task")
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__description("bpf_get_task_stack return R0 range is refined")
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__success
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__naked void return_r0_range_is_refined(void)
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{
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asm volatile (" \
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r6 = *(u64*)(r1 + 0); \
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r6 = *(u64*)(r6 + 0); /* ctx->meta->seq */\
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r7 = *(u64*)(r1 + 8); /* ctx->task */\
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r1 = %[map_array_48b] ll; /* fixup_map_array_48b */\
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r2 = 0; \
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*(u64*)(r10 - 8) = r2; \
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r2 = r10; \
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r2 += -8; \
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call %[bpf_map_lookup_elem]; \
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if r0 != 0 goto l0_%=; \
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r0 = 0; \
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exit; \
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l0_%=: if r7 != 0 goto l1_%=; \
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r0 = 0; \
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exit; \
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l1_%=: r1 = r7; \
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r2 = r0; \
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r9 = r0; /* keep buf for seq_write */\
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r3 = 48; \
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r4 = 0; \
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call %[bpf_get_task_stack]; \
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if r0 s> 0 goto l2_%=; \
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r0 = 0; \
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exit; \
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l2_%=: r1 = r6; \
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r2 = r9; \
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r3 = r0; \
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call %[bpf_seq_write]; \
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r0 = 0; \
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exit; \
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" :
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: __imm(bpf_get_task_stack),
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__imm(bpf_map_lookup_elem),
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__imm(bpf_seq_write),
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__imm_addr(map_array_48b)
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: __clobber_all);
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}
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char _license[] SEC("license") = "GPL";
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