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78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
// clang-format off
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#include <linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_core_read.h>
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// clang-format on
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#include <stdlib.h>
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long set_output(__u64 value) { exit((int)value); }
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struct relocated_struct_with_scalars {
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__u8 b;
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__u8 c;
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__u8 d;
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};
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__attribute__((noinline)) int field_global() {
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struct relocated_struct_with_scalars s = {1, 2, 3};
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return set_output(__builtin_preserve_access_index(s.b));
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}
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struct relocated_struct_with_pointer {
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struct relocated_struct_with_pointer *second;
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struct relocated_struct_with_pointer *first;
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};
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__attribute__((noinline)) int pointer_global() {
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struct relocated_struct_with_pointer s = {
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(struct relocated_struct_with_pointer *)42,
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(struct relocated_struct_with_pointer *)21,
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};
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return set_output((__u64)__builtin_preserve_access_index(s.first));
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}
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__attribute__((noinline)) int struct_flavors_global() {
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struct relocated_struct_with_scalars s = {1, 2, 3};
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if (bpf_core_field_exists(s.b)) {
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return set_output(__builtin_preserve_access_index(s.b));
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} else {
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return set_output(__builtin_preserve_access_index(s.c));
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}
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}
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enum relocated_enum_unsigned_32 { U32 = 0xBBBBBBBB };
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__attribute__((noinline)) int enum_unsigned_32_global() {
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return set_output(bpf_core_enum_value(enum relocated_enum_unsigned_32, U32));
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}
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enum relocated_enum_signed_32 { S32 = -0x7BBBBBBB };
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__attribute__((noinline)) int enum_signed_32_global() {
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return set_output(bpf_core_enum_value(enum relocated_enum_signed_32, S32));
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}
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enum relocated_enum_unsigned_64 { U64 = 0xCCCCCCCCDDDDDDDD };
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__attribute__((noinline)) int enum_unsigned_64_global() {
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return set_output(bpf_core_enum_value(enum relocated_enum_unsigned_64, U64));
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}
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enum relocated_enum_signed_64 { u64 = -0xCCCCCCCDDDDDDDD };
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__attribute__((noinline)) int enum_signed_64_global() {
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return set_output(bpf_core_enum_value(enum relocated_enum_signed_64, u64));
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}
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// Avoids dead code elimination by the compiler.
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int main() {
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field_global();
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pointer_global();
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struct_flavors_global();
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enum_unsigned_32_global();
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enum_signed_32_global();
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enum_unsigned_64_global();
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enum_signed_64_global();
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}
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