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

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

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/progs/verifier_map_ptr_mixing.c
Extension
.c
Size
6153 bytes
Lines
266
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 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");

struct {
	__uint(type, BPF_MAP_TYPE_ARRAY_OF_MAPS);
	__uint(max_entries, 1);
	__type(key, int);
	__type(value, int);
	__array(values, struct {
		__uint(type, BPF_MAP_TYPE_ARRAY);
		__uint(max_entries, 1);
		__type(key, int);
		__type(value, int);
	});
} map_in_map SEC(".maps");

void dummy_prog_42_socket(void);
void dummy_prog_24_socket(void);
void dummy_prog_loop1_socket(void);
void dummy_prog_loop2_socket(void);

struct {
	__uint(type, BPF_MAP_TYPE_PROG_ARRAY);
	__uint(max_entries, 4);
	__uint(key_size, sizeof(int));
	__array(values, void (void));
} map_prog1_socket SEC(".maps") = {
	.values = {
		[0] = (void *)&dummy_prog_42_socket,
		[1] = (void *)&dummy_prog_loop1_socket,
		[2] = (void *)&dummy_prog_24_socket,
	},
};

struct {
	__uint(type, BPF_MAP_TYPE_PROG_ARRAY);
	__uint(max_entries, 8);
	__uint(key_size, sizeof(int));
	__array(values, void (void));
} map_prog2_socket SEC(".maps") = {
	.values = {
		[1] = (void *)&dummy_prog_loop2_socket,
		[2] = (void *)&dummy_prog_24_socket,
		[7] = (void *)&dummy_prog_42_socket,
	},
};

SEC("socket")
__auxiliary __auxiliary_unpriv
__naked void dummy_prog_42_socket(void)
{
	asm volatile ("r0 = 42; exit;");
}

SEC("socket")
__auxiliary __auxiliary_unpriv
__naked void dummy_prog_24_socket(void)
{
	asm volatile ("r0 = 24; exit;");
}

SEC("socket")
__auxiliary __auxiliary_unpriv
__naked void dummy_prog_loop1_socket(void)
{
	asm volatile ("			\
	r3 = 1;				\
	r2 = %[map_prog1_socket] ll;	\
	call %[bpf_tail_call];		\
	r0 = 41;			\
	exit;				\
"	:
	: __imm(bpf_tail_call),
	  __imm_addr(map_prog1_socket)

Annotation

Implementation Notes