tools/testing/selftests/bpf/progs/test_core_reloc_nesting.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/progs/test_core_reloc_nesting.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/progs/test_core_reloc_nesting.c
Extension
.c
Size
905 bytes
Lines
50
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

struct core_reloc_nesting_substruct {
	int a;
};

union core_reloc_nesting_subunion {
	int b;
};

/* int a.a.a and b.b.b accesses */
struct core_reloc_nesting {
	union {
		struct core_reloc_nesting_substruct a;
	} a;
	struct {
		union core_reloc_nesting_subunion b;
	} b;
};

#define CORE_READ(dst, src) bpf_core_read(dst, sizeof(*(dst)), src)

SEC("raw_tracepoint/sys_enter")
int test_core_nesting(void *ctx)
{
	struct core_reloc_nesting *in = (void *)&data.in;
	struct core_reloc_nesting *out = (void *)&data.out;

	if (CORE_READ(&out->a.a.a, &in->a.a.a))
		return 1;
	if (CORE_READ(&out->b.b.b, &in->b.b.b))
		return 1;

	return 0;
}

Annotation

Implementation Notes