[mirror_ubuntu-kernels.git] / tools / testing / selftests / bpf / bpf_helpers.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __BPF_HELPERS_H
#define __BPF_HELPERS_H

/* helper macro to place programs, maps, license in
 * different sections in elf_bpf file. Section names
 * are interpreted by elf_bpf loader
 */
#define SEC(NAME) __attribute__((section(NAME), used))

/* helper functions called from eBPF programs written in C */
static void *(*bpf_map_lookup_elem)(void *map, void *key) =
	(void *) BPF_FUNC_map_lookup_elem;
static int (*bpf_map_update_elem)(void *map, void *key, void *value,
				  unsigned long long flags) =
	(void *) BPF_FUNC_map_update_elem;
static int (*bpf_map_delete_elem)(void *map, void *key) =
	(void *) BPF_FUNC_map_delete_elem;
static int (*bpf_map_push_elem)(void *map, void *value,
				unsigned long long flags) =
	(void *) BPF_FUNC_map_push_elem;
static int (*bpf_map_pop_elem)(void *map, void *value) =
	(void *) BPF_FUNC_map_pop_elem;
static int (*bpf_map_peek_elem)(void *map, void *value) =
	(void *) BPF_FUNC_map_peek_elem;
static int (*bpf_probe_read)(void *dst, int size, void *unsafe_ptr) =
	(void *) BPF_FUNC_probe_read;
static unsigned long long (*bpf_ktime_get_ns)(void) =
	(void *) BPF_FUNC_ktime_get_ns;
static int (*bpf_trace_printk)(const char *fmt, int fmt_size, ...) =
	(void *) BPF_FUNC_trace_printk;
static void (*bpf_tail_call)(void *ctx, void *map, int index) =
	(void *) BPF_FUNC_tail_call;
static unsigned long long (*bpf_get_smp_processor_id)(void) =
	(void *) BPF_FUNC_get_smp_processor_id;
static unsigned long long (*bpf_get_current_pid_tgid)(void) =
	(void *) BPF_FUNC_get_current_pid_tgid;
static unsigned long long (*bpf_get_current_uid_gid)(void) =
	(void *) BPF_FUNC_get_current_uid_gid;
static int (*bpf_get_current_comm)(void *buf, int buf_size) =
	(void *) BPF_FUNC_get_current_comm;
static unsigned long long (*bpf_perf_event_read)(void *map,
						 unsigned long long flags) =
	(void *) BPF_FUNC_perf_event_read;
static int (*bpf_clone_redirect)(void *ctx, int ifindex, int flags) =
	(void *) BPF_FUNC_clone_redirect;
static int (*bpf_redirect)(int ifindex, int flags) =
	(void *) BPF_FUNC_redirect;
static int (*bpf_redirect_map)(void *map, int key, int flags) =
	(void *) BPF_FUNC_redirect_map;
static int (*bpf_perf_event_output)(void *ctx, void *map,
				    unsigned long long flags, void *data,
				    int size) =
	(void *) BPF_FUNC_perf_event_output;
static int (*bpf_get_stackid)(void *ctx, void *map, int flags) =
	(void *) BPF_FUNC_get_stackid;
static int (*bpf_probe_write_user)(void *dst, void *src, int size) =
	(void *) BPF_FUNC_probe_write_user;
static int (*bpf_current_task_under_cgroup)(void *map, int index) =
	(void *) BPF_FUNC_current_task_under_cgroup;
static int (*bpf_skb_get_tunnel_key)(void *ctx, void *key, int size, int flags) =
	(void *) BPF_FUNC_skb_get_tunnel_key;
static int (*bpf_skb_set_tunnel_key)(void *ctx, void *key, int size, int flags) =
	(void *) BPF_FUNC_skb_set_tunnel_key;
static int (*bpf_skb_get_tunnel_opt)(void *ctx, void *md, int size) =
	(void *) BPF_FUNC_skb_get_tunnel_opt;
static int (*bpf_skb_set_tunnel_opt)(void *ctx, void *md, int size) =
	(void *) BPF_FUNC_skb_set_tunnel_opt;
static unsigned long long (*bpf_get_prandom_u32)(void) =
	(void *) BPF_FUNC_get_prandom_u32;
static int (*bpf_xdp_adjust_head)(void *ctx, int offset) =
	(void *) BPF_FUNC_xdp_adjust_head;
static int (*bpf_xdp_adjust_meta)(void *ctx, int offset) =
	(void *) BPF_FUNC_xdp_adjust_meta;
static int (*bpf_get_socket_cookie)(void *ctx) =
	(void *) BPF_FUNC_get_socket_cookie;
static int (*bpf_setsockopt)(void *ctx, int level, int optname, void *optval,
			     int optlen) =
	(void *) BPF_FUNC_setsockopt;
static int (*bpf_getsockopt)(void *ctx, int level, int optname, void *optval,
			     int optlen) =
	(void *) BPF_FUNC_getsockopt;
static int (*bpf_sock_ops_cb_flags_set)(void *ctx, int flags) =
	(void *) BPF_FUNC_sock_ops_cb_flags_set;
static int (*bpf_sk_redirect_map)(void *ctx, void *map, int key, int flags) =
	(void *) BPF_FUNC_sk_redirect_map;
static int (*bpf_sk_redirect_hash)(void *ctx, void *map, void *key, int flags) =
	(void *) BPF_FUNC_sk_redirect_hash;
static int (*bpf_sock_map_update)(void *map, void *key, void *value,
				  unsigned long long flags) =
	(void *) BPF_FUNC_sock_map_update;
static int (*bpf_sock_hash_update)(void *map, void *key, void *value,
				   unsigned long long flags) =
	(void *) BPF_FUNC_sock_hash_update;
static int (*bpf_perf_event_read_value)(void *map, unsigned long long flags,
					void *buf, unsigned int buf_size) =
	(void *) BPF_FUNC_perf_event_read_value;
static int (*bpf_perf_prog_read_value)(void *ctx, void *buf,
				       unsigned int buf_size) =
	(void *) BPF_FUNC_perf_prog_read_value;
static int (*bpf_override_return)(void *ctx, unsigned long rc) =
	(void *) BPF_FUNC_override_return;
static int (*bpf_msg_redirect_map)(void *ctx, void *map, int key, int flags) =
	(void *) BPF_FUNC_msg_redirect_map;
static int (*bpf_msg_redirect_hash)(void *ctx,
				    void *map, void *key, int flags) =
	(void *) BPF_FUNC_msg_redirect_hash;
static int (*bpf_msg_apply_bytes)(void *ctx, int len) =
	(void *) BPF_FUNC_msg_apply_bytes;
static int (*bpf_msg_cork_bytes)(void *ctx, int len) =
	(void *) BPF_FUNC_msg_cork_bytes;
static int (*bpf_msg_pull_data)(void *ctx, int start, int end, int flags) =
	(void *) BPF_FUNC_msg_pull_data;
static int (*bpf_msg_push_data)(void *ctx, int start, int end, int flags) =
	(void *) BPF_FUNC_msg_push_data;
static int (*bpf_msg_pop_data)(void *ctx, int start, int cut, int flags) =
	(void *) BPF_FUNC_msg_pop_data;
static int (*bpf_bind)(void *ctx, void *addr, int addr_len) =
	(void *) BPF_FUNC_bind;
static int (*bpf_xdp_adjust_tail)(void *ctx, int offset) =
	(void *) BPF_FUNC_xdp_adjust_tail;
static int (*bpf_skb_get_xfrm_state)(void *ctx, int index, void *state,
				     int size, int flags) =
	(void *) BPF_FUNC_skb_get_xfrm_state;
static int (*bpf_sk_select_reuseport)(void *ctx, void *map, void *key, __u32 flags) =
	(void *) BPF_FUNC_sk_select_reuseport;
static int (*bpf_get_stack)(void *ctx, void *buf, int size, int flags) =
	(void *) BPF_FUNC_get_stack;
static int (*bpf_fib_lookup)(void *ctx, struct bpf_fib_lookup *params,
			     int plen, __u32 flags) =
	(void *) BPF_FUNC_fib_lookup;
static int (*bpf_lwt_push_encap)(void *ctx, unsigned int type, void *hdr,
				 unsigned int len) =
	(void *) BPF_FUNC_lwt_push_encap;
static int (*bpf_lwt_seg6_store_bytes)(void *ctx, unsigned int offset,
				       void *from, unsigned int len) =
	(void *) BPF_FUNC_lwt_seg6_store_bytes;
static int (*bpf_lwt_seg6_action)(void *ctx, unsigned int action, void *param,
				  unsigned int param_len) =
	(void *) BPF_FUNC_lwt_seg6_action;
static int (*bpf_lwt_seg6_adjust_srh)(void *ctx, unsigned int offset,
				      unsigned int len) =
	(void *) BPF_FUNC_lwt_seg6_adjust_srh;
static int (*bpf_rc_repeat)(void *ctx) =
	(void *) BPF_FUNC_rc_repeat;
static int (*bpf_rc_keydown)(void *ctx, unsigned int protocol,
			     unsigned long long scancode, unsigned int toggle) =
	(void *) BPF_FUNC_rc_keydown;
static unsigned long long (*bpf_get_current_cgroup_id)(void) =
	(void *) BPF_FUNC_get_current_cgroup_id;
static void *(*bpf_get_local_storage)(void *map, unsigned long long flags) =
	(void *) BPF_FUNC_get_local_storage;
static unsigned long long (*bpf_skb_cgroup_id)(void *ctx) =
	(void *) BPF_FUNC_skb_cgroup_id;
static unsigned long long (*bpf_skb_ancestor_cgroup_id)(void *ctx, int level) =
	(void *) BPF_FUNC_skb_ancestor_cgroup_id;
static struct bpf_sock *(*bpf_sk_lookup_tcp)(void *ctx,
					     struct bpf_sock_tuple *tuple,
					     int size, unsigned long long netns_id,
					     unsigned long long flags) =
	(void *) BPF_FUNC_sk_lookup_tcp;
static struct bpf_sock *(*bpf_sk_lookup_udp)(void *ctx,
					     struct bpf_sock_tuple *tuple,
					     int size, unsigned long long netns_id,
					     unsigned long long flags) =
	(void *) BPF_FUNC_sk_lookup_udp;
static int (*bpf_sk_release)(struct bpf_sock *sk) =
	(void *) BPF_FUNC_sk_release;
static int (*bpf_skb_vlan_push)(void *ctx, __be16 vlan_proto, __u16 vlan_tci) =
	(void *) BPF_FUNC_skb_vlan_push;
static int (*bpf_skb_vlan_pop)(void *ctx) =
	(void *) BPF_FUNC_skb_vlan_pop;
static int (*bpf_rc_pointer_rel)(void *ctx, int rel_x, int rel_y) =
	(void *) BPF_FUNC_rc_pointer_rel;
static void (*bpf_spin_lock)(struct bpf_spin_lock *lock) =
	(void *) BPF_FUNC_spin_lock;
static void (*bpf_spin_unlock)(struct bpf_spin_lock *lock) =
	(void *) BPF_FUNC_spin_unlock;
static struct bpf_sock *(*bpf_sk_fullsock)(struct bpf_sock *sk) =
	(void *) BPF_FUNC_sk_fullsock;
static struct bpf_tcp_sock *(*bpf_tcp_sock)(struct bpf_sock *sk) =
	(void *) BPF_FUNC_tcp_sock;
static struct bpf_sock *(*bpf_get_listener_sock)(struct bpf_sock *sk) =
	(void *) BPF_FUNC_get_listener_sock;
static int (*bpf_skb_ecn_set_ce)(void *ctx) =
	(void *) BPF_FUNC_skb_ecn_set_ce;

/* llvm builtin functions that eBPF C program may use to
 * emit BPF_LD_ABS and BPF_LD_IND instructions
 */
struct sk_buff;
unsigned long long load_byte(void *skb,
			     unsigned long long off) asm("llvm.bpf.load.byte");
unsigned long long load_half(void *skb,
			     unsigned long long off) asm("llvm.bpf.load.half");
unsigned long long load_word(void *skb,
			     unsigned long long off) asm("llvm.bpf.load.word");

/* a helper structure used by eBPF C program
 * to describe map attributes to elf_bpf loader
 */
struct bpf_map_def {
	unsigned int type;
	unsigned int key_size;
	unsigned int value_size;
	unsigned int max_entries;
	unsigned int map_flags;
	unsigned int inner_map_idx;
	unsigned int numa_node;
};

#define BPF_ANNOTATE_KV_PAIR(name, type_key, type_val)		\
	struct ____btf_map_##name {				\
		type_key key;					\
		type_val value;					\
	};							\
	struct ____btf_map_##name				\
	__attribute__ ((section(".maps." #name), used))		\
		____btf_map_##name = { }

static int (*bpf_skb_load_bytes)(void *ctx, int off, void *to, int len) =
	(void *) BPF_FUNC_skb_load_bytes;
static int (*bpf_skb_load_bytes_relative)(void *ctx, int off, void *to, int len, __u32 start_header) =
	(void *) BPF_FUNC_skb_load_bytes_relative;
static int (*bpf_skb_store_bytes)(void *ctx, int off, void *from, int len, int flags) =
	(void *) BPF_FUNC_skb_store_bytes;
static int (*bpf_l3_csum_replace)(void *ctx, int off, int from, int to, int flags) =
	(void *) BPF_FUNC_l3_csum_replace;
static int (*bpf_l4_csum_replace)(void *ctx, int off, int from, int to, int flags) =
	(void *) BPF_FUNC_l4_csum_replace;
static int (*bpf_csum_diff)(void *from, int from_size, void *to, int to_size, int seed) =
	(void *) BPF_FUNC_csum_diff;
static int (*bpf_skb_under_cgroup)(void *ctx, void *map, int index) =
	(void *) BPF_FUNC_skb_under_cgroup;
static int (*bpf_skb_change_head)(void *, int len, int flags) =
	(void *) BPF_FUNC_skb_change_head;
static int (*bpf_skb_pull_data)(void *, int len) =
	(void *) BPF_FUNC_skb_pull_data;
static unsigned int (*bpf_get_cgroup_classid)(void *ctx) =
	(void *) BPF_FUNC_get_cgroup_classid;
static unsigned int (*bpf_get_route_realm)(void *ctx) =
	(void *) BPF_FUNC_get_route_realm;
static int (*bpf_skb_change_proto)(void *ctx, __be16 proto, __u64 flags) =
	(void *) BPF_FUNC_skb_change_proto;
static int (*bpf_skb_change_type)(void *ctx, __u32 type) =
	(void *) BPF_FUNC_skb_change_type;
static unsigned int (*bpf_get_hash_recalc)(void *ctx) =
	(void *) BPF_FUNC_get_hash_recalc;
static unsigned long long (*bpf_get_current_task)(void *ctx) =
	(void *) BPF_FUNC_get_current_task;
static int (*bpf_skb_change_tail)(void *ctx, __u32 len, __u64 flags) =
	(void *) BPF_FUNC_skb_change_tail;
static long long (*bpf_csum_update)(void *ctx, __u32 csum) =
	(void *) BPF_FUNC_csum_update;
static void (*bpf_set_hash_invalid)(void *ctx) =
	(void *) BPF_FUNC_set_hash_invalid;
static int (*bpf_get_numa_node_id)(void) =
	(void *) BPF_FUNC_get_numa_node_id;
static int (*bpf_probe_read_str)(void *ctx, __u32 size,
				 const void *unsafe_ptr) =
	(void *) BPF_FUNC_probe_read_str;
static unsigned int (*bpf_get_socket_uid)(void *ctx) =
	(void *) BPF_FUNC_get_socket_uid;
static unsigned int (*bpf_set_hash)(void *ctx, __u32 hash) =
	(void *) BPF_FUNC_set_hash;
static int (*bpf_skb_adjust_room)(void *ctx, __s32 len_diff, __u32 mode,
				  unsigned long long flags) =
	(void *) BPF_FUNC_skb_adjust_room;

/* Scan the ARCH passed in from ARCH env variable (see Makefile) */
#if defined(__TARGET_ARCH_x86)
	#define bpf_target_x86
	#define bpf_target_defined
#elif defined(__TARGET_ARCH_s930x)
	#define bpf_target_s930x
	#define bpf_target_defined
#elif defined(__TARGET_ARCH_arm64)
	#define bpf_target_arm64
	#define bpf_target_defined
#elif defined(__TARGET_ARCH_mips)
	#define bpf_target_mips
	#define bpf_target_defined
#elif defined(__TARGET_ARCH_powerpc)
	#define bpf_target_powerpc
	#define bpf_target_defined
#elif defined(__TARGET_ARCH_sparc)
	#define bpf_target_sparc
	#define bpf_target_defined
#else
	#undef bpf_target_defined
#endif

/* Fall back to what the compiler says */
#ifndef bpf_target_defined
#if defined(__x86_64__)
	#define bpf_target_x86
#elif defined(__s390x__)
	#define bpf_target_s930x
#elif defined(__aarch64__)
	#define bpf_target_arm64
#elif defined(__mips__)
	#define bpf_target_mips
#elif defined(__powerpc__)
	#define bpf_target_powerpc
#elif defined(__sparc__)
	#define bpf_target_sparc
#endif
#endif

#if defined(bpf_target_x86)

#define PT_REGS_PARM1(x) ((x)->di)
#define PT_REGS_PARM2(x) ((x)->si)
#define PT_REGS_PARM3(x) ((x)->dx)
#define PT_REGS_PARM4(x) ((x)->cx)
#define PT_REGS_PARM5(x) ((x)->r8)
#define PT_REGS_RET(x) ((x)->sp)
#define PT_REGS_FP(x) ((x)->bp)
#define PT_REGS_RC(x) ((x)->ax)
#define PT_REGS_SP(x) ((x)->sp)
#define PT_REGS_IP(x) ((x)->ip)

#elif defined(bpf_target_s390x)

#define PT_REGS_PARM1(x) ((x)->gprs[2])
#define PT_REGS_PARM2(x) ((x)->gprs[3])
#define PT_REGS_PARM3(x) ((x)->gprs[4])
#define PT_REGS_PARM4(x) ((x)->gprs[5])
#define PT_REGS_PARM5(x) ((x)->gprs[6])
#define PT_REGS_RET(x) ((x)->gprs[14])
#define PT_REGS_FP(x) ((x)->gprs[11]) /* Works only with CONFIG_FRAME_POINTER */
#define PT_REGS_RC(x) ((x)->gprs[2])
#define PT_REGS_SP(x) ((x)->gprs[15])
#define PT_REGS_IP(x) ((x)->psw.addr)

#elif defined(bpf_target_arm64)

#define PT_REGS_PARM1(x) ((x)->regs[0])
#define PT_REGS_PARM2(x) ((x)->regs[1])
#define PT_REGS_PARM3(x) ((x)->regs[2])
#define PT_REGS_PARM4(x) ((x)->regs[3])
#define PT_REGS_PARM5(x) ((x)->regs[4])
#define PT_REGS_RET(x) ((x)->regs[30])
#define PT_REGS_FP(x) ((x)->regs[29]) /* Works only with CONFIG_FRAME_POINTER */
#define PT_REGS_RC(x) ((x)->regs[0])
#define PT_REGS_SP(x) ((x)->sp)
#define PT_REGS_IP(x) ((x)->pc)

#elif defined(bpf_target_mips)

#define PT_REGS_PARM1(x) ((x)->regs[4])
#define PT_REGS_PARM2(x) ((x)->regs[5])
#define PT_REGS_PARM3(x) ((x)->regs[6])
#define PT_REGS_PARM4(x) ((x)->regs[7])
#define PT_REGS_PARM5(x) ((x)->regs[8])
#define PT_REGS_RET(x) ((x)->regs[31])
#define PT_REGS_FP(x) ((x)->regs[30]) /* Works only with CONFIG_FRAME_POINTER */
#define PT_REGS_RC(x) ((x)->regs[1])
#define PT_REGS_SP(x) ((x)->regs[29])
#define PT_REGS_IP(x) ((x)->cp0_epc)

#elif defined(bpf_target_powerpc)

#define PT_REGS_PARM1(x) ((x)->gpr[3])
#define PT_REGS_PARM2(x) ((x)->gpr[4])
#define PT_REGS_PARM3(x) ((x)->gpr[5])
#define PT_REGS_PARM4(x) ((x)->gpr[6])
#define PT_REGS_PARM5(x) ((x)->gpr[7])
#define PT_REGS_RC(x) ((x)->gpr[3])
#define PT_REGS_SP(x) ((x)->sp)
#define PT_REGS_IP(x) ((x)->nip)

#elif defined(bpf_target_sparc)

#define PT_REGS_PARM1(x) ((x)->u_regs[UREG_I0])
#define PT_REGS_PARM2(x) ((x)->u_regs[UREG_I1])
#define PT_REGS_PARM3(x) ((x)->u_regs[UREG_I2])
#define PT_REGS_PARM4(x) ((x)->u_regs[UREG_I3])
#define PT_REGS_PARM5(x) ((x)->u_regs[UREG_I4])
#define PT_REGS_RET(x) ((x)->u_regs[UREG_I7])
#define PT_REGS_RC(x) ((x)->u_regs[UREG_I0])
#define PT_REGS_SP(x) ((x)->u_regs[UREG_FP])

/* Should this also be a bpf_target check for the sparc case? */
#if defined(__arch64__)
#define PT_REGS_IP(x) ((x)->tpc)
#else
#define PT_REGS_IP(x) ((x)->pc)
#endif

#endif

#ifdef bpf_target_powerpc
#define BPF_KPROBE_READ_RET_IP(ip, ctx)		({ (ip) = (ctx)->link; })
#define BPF_KRETPROBE_READ_RET_IP		BPF_KPROBE_READ_RET_IP
#elif bpf_target_sparc
#define BPF_KPROBE_READ_RET_IP(ip, ctx)		({ (ip) = PT_REGS_RET(ctx); })
#define BPF_KRETPROBE_READ_RET_IP		BPF_KPROBE_READ_RET_IP
#else
#define BPF_KPROBE_READ_RET_IP(ip, ctx)		({				\
		bpf_probe_read(&(ip), sizeof(ip), (void *)PT_REGS_RET(ctx)); })
#define BPF_KRETPROBE_READ_RET_IP(ip, ctx)	({				\
		bpf_probe_read(&(ip), sizeof(ip),				\
				(void *)(PT_REGS_FP(ctx) + sizeof(ip))); })
#endif

#endif
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
249b812d AS	2	#ifndef __BPF_HELPERS_H
	3	#define __BPF_HELPERS_H
	4
	5	/* helper macro to place programs, maps, license in
	6	* different sections in elf_bpf file. Section names
	7	* are interpreted by elf_bpf loader
	8	*/
	9	#define SEC(NAME) __attribute__((section(NAME), used))
	10
	11	/* helper functions called from eBPF programs written in C */
	12	static void (bpf_map_lookup_elem)(void map, void key) =
	13	(void *) BPF_FUNC_map_lookup_elem;
	14	static int (bpf_map_update_elem)(void map, void key, void value,
	15	unsigned long long flags) =
	16	(void *) BPF_FUNC_map_update_elem;
	17	static int (bpf_map_delete_elem)(void map, void *key) =
	18	(void *) BPF_FUNC_map_delete_elem;
43b987d2 MV	19	static int (bpf_map_push_elem)(void map, void *value,
	20	unsigned long long flags) =
	21	(void *) BPF_FUNC_map_push_elem;
	22	static int (bpf_map_pop_elem)(void map, void *value) =
	23	(void *) BPF_FUNC_map_pop_elem;
	24	static int (bpf_map_peek_elem)(void map, void *value) =
	25	(void *) BPF_FUNC_map_peek_elem;
b896c4f9 AS	26	static int (bpf_probe_read)(void dst, int size, void *unsafe_ptr) =
	27	(void *) BPF_FUNC_probe_read;
	28	static unsigned long long (*bpf_ktime_get_ns)(void) =
	29	(void *) BPF_FUNC_ktime_get_ns;
	30	static int (bpf_trace_printk)(const char fmt, int fmt_size, ...) =
	31	(void *) BPF_FUNC_trace_printk;
5bacd780 AS	32	static void (bpf_tail_call)(void ctx, void *map, int index) =
5bacd780 AS	33	(void *) BPF_FUNC_tail_call;
530b2c86 AS	34	static unsigned long long (*bpf_get_smp_processor_id)(void) =
530b2c86 AS	35	(void *) BPF_FUNC_get_smp_processor_id;
ffeedafb AS	36	static unsigned long long (*bpf_get_current_pid_tgid)(void) =
	37	(void *) BPF_FUNC_get_current_pid_tgid;
	38	static unsigned long long (*bpf_get_current_uid_gid)(void) =
	39	(void *) BPF_FUNC_get_current_uid_gid;
	40	static int (bpf_get_current_comm)(void buf, int buf_size) =
	41	(void *) BPF_FUNC_get_current_comm;
41e9a804 TQ	42	static unsigned long long (bpf_perf_event_read)(void map,
41e9a804 TQ	43	unsigned long long flags) =
47efb302	44	(void *) BPF_FUNC_perf_event_read;
27b29f63 AS	45	static int (bpf_clone_redirect)(void ctx, int ifindex, int flags) =
	46	(void *) BPF_FUNC_clone_redirect;
	47	static int (*bpf_redirect)(int ifindex, int flags) =
	48	(void *) BPF_FUNC_redirect;
9d6e0052 JF	49	static int (bpf_redirect_map)(void map, int key, int flags) =
9d6e0052 JF	50	(void *) BPF_FUNC_redirect_map;
05b8ad25 AB	51	static int (bpf_perf_event_output)(void ctx, void *map,
	52	unsigned long long flags, void *data,
	53	int size) =
39111695	54	(void *) BPF_FUNC_perf_event_output;
a6ffe7b9 AS	55	static int (bpf_get_stackid)(void ctx, void *map, int flags) =
a6ffe7b9 AS	56	(void *) BPF_FUNC_get_stackid;
96ae5227 SD	57	static int (bpf_probe_write_user)(void dst, void *src, int size) =
96ae5227 SD	58	(void *) BPF_FUNC_probe_write_user;
9e6e60ec SD	59	static int (bpf_current_task_under_cgroup)(void map, int index) =
9e6e60ec SD	60	(void *) BPF_FUNC_current_task_under_cgroup;
6afb1e28 WT	61	static int (bpf_skb_get_tunnel_key)(void ctx, void *key, int size, int flags) =
	62	(void *) BPF_FUNC_skb_get_tunnel_key;
	63	static int (bpf_skb_set_tunnel_key)(void ctx, void *key, int size, int flags) =
	64	(void *) BPF_FUNC_skb_set_tunnel_key;
	65	static int (bpf_skb_get_tunnel_opt)(void ctx, void *md, int size) =
	66	(void *) BPF_FUNC_skb_get_tunnel_opt;
	67	static int (bpf_skb_set_tunnel_opt)(void ctx, void *md, int size) =
	68	(void *) BPF_FUNC_skb_set_tunnel_opt;
1c47910e AS	69	static unsigned long long (*bpf_get_prandom_u32)(void) =
1c47910e AS	70	(void *) BPF_FUNC_get_prandom_u32;
12d8bb64 MKL	71	static int (bpf_xdp_adjust_head)(void ctx, int offset) =
12d8bb64 MKL	72	(void *) BPF_FUNC_xdp_adjust_head;
22c88526 DB	73	static int (bpf_xdp_adjust_meta)(void ctx, int offset) =
22c88526 DB	74	(void *) BPF_FUNC_xdp_adjust_meta;
0289a2cc AI	75	static int (bpf_get_socket_cookie)(void ctx) =
0289a2cc AI	76	(void *) BPF_FUNC_get_socket_cookie;
8c4b4c7e LB	77	static int (bpf_setsockopt)(void ctx, int level, int optname, void *optval,
	78	int optlen) =
	79	(void *) BPF_FUNC_setsockopt;
cd86d1fd LB	80	static int (bpf_getsockopt)(void ctx, int level, int optname, void *optval,
	81	int optlen) =
	82	(void *) BPF_FUNC_getsockopt;
d6d4f60c LB	83	static int (bpf_sock_ops_cb_flags_set)(void ctx, int flags) =
d6d4f60c LB	84	(void *) BPF_FUNC_sock_ops_cb_flags_set;
34f79502	85	static int (bpf_sk_redirect_map)(void ctx, void *map, int key, int flags) =
69e8cc13	86	(void *) BPF_FUNC_sk_redirect_map;
b8b394fa JF	87	static int (bpf_sk_redirect_hash)(void ctx, void map, void key, int flags) =
b8b394fa JF	88	(void *) BPF_FUNC_sk_redirect_hash;
69e8cc13	89	static int (bpf_sock_map_update)(void map, void key, void value,
464bc0fd	90	unsigned long long flags) =
69e8cc13	91	(void *) BPF_FUNC_sock_map_update;
b8b394fa JF	92	static int (bpf_sock_hash_update)(void map, void key, void value,
	93	unsigned long long flags) =
	94	(void *) BPF_FUNC_sock_hash_update;
020a32d9 YS	95	static int (bpf_perf_event_read_value)(void map, unsigned long long flags,
	96	void *buf, unsigned int buf_size) =
	97	(void *) BPF_FUNC_perf_event_read_value;
81b9cf80 YS	98	static int (bpf_perf_prog_read_value)(void ctx, void *buf,
	99	unsigned int buf_size) =
	100	(void *) BPF_FUNC_perf_prog_read_value;
965de87e JB	101	static int (bpf_override_return)(void ctx, unsigned long rc) =
965de87e JB	102	(void *) BPF_FUNC_override_return;
4c4c3c27 JF	103	static int (bpf_msg_redirect_map)(void ctx, void *map, int key, int flags) =
4c4c3c27 JF	104	(void *) BPF_FUNC_msg_redirect_map;
b8b394fa JF	105	static int (bpf_msg_redirect_hash)(void ctx,
	106	void map, void key, int flags) =
	107	(void *) BPF_FUNC_msg_redirect_hash;
1c16c312 JF	108	static int (bpf_msg_apply_bytes)(void ctx, int len) =
1c16c312 JF	109	(void *) BPF_FUNC_msg_apply_bytes;
468b3fde JF	110	static int (bpf_msg_cork_bytes)(void ctx, int len) =
468b3fde JF	111	(void *) BPF_FUNC_msg_cork_bytes;
0dcbbf67 JF	112	static int (bpf_msg_pull_data)(void ctx, int start, int end, int flags) =
0dcbbf67 JF	113	(void *) BPF_FUNC_msg_pull_data;
f908d26b JF	114	static int (bpf_msg_push_data)(void ctx, int start, int end, int flags) =
f908d26b JF	115	(void *) BPF_FUNC_msg_push_data;
d913a227 JF	116	static int (bpf_msg_pop_data)(void ctx, int start, int cut, int flags) =
d913a227 JF	117	(void *) BPF_FUNC_msg_pop_data;
622adafb AI	118	static int (bpf_bind)(void ctx, void *addr, int addr_len) =
622adafb AI	119	(void *) BPF_FUNC_bind;
0367d0a2 NS	120	static int (bpf_xdp_adjust_tail)(void ctx, int offset) =
0367d0a2 NS	121	(void *) BPF_FUNC_xdp_adjust_tail;
29a36f9e EB	122	static int (bpf_skb_get_xfrm_state)(void ctx, int index, void *state,
	123	int size, int flags) =
	124	(void *) BPF_FUNC_skb_get_xfrm_state;
91134d84 MKL	125	static int (bpf_sk_select_reuseport)(void ctx, void map, void key, __u32 flags) =
91134d84 MKL	126	(void *) BPF_FUNC_sk_select_reuseport;
de2ff05f YS	127	static int (bpf_get_stack)(void ctx, void *buf, int size, int flags) =
de2ff05f YS	128	(void *) BPF_FUNC_get_stack;
fe616055 DA	129	static int (bpf_fib_lookup)(void ctx, struct bpf_fib_lookup *params,
	130	int plen, __u32 flags) =
	131	(void *) BPF_FUNC_fib_lookup;
c99a84ea MX	132	static int (bpf_lwt_push_encap)(void ctx, unsigned int type, void *hdr,
	133	unsigned int len) =
	134	(void *) BPF_FUNC_lwt_push_encap;
	135	static int (bpf_lwt_seg6_store_bytes)(void ctx, unsigned int offset,
	136	void *from, unsigned int len) =
	137	(void *) BPF_FUNC_lwt_seg6_store_bytes;
	138	static int (bpf_lwt_seg6_action)(void ctx, unsigned int action, void *param,
	139	unsigned int param_len) =
	140	(void *) BPF_FUNC_lwt_seg6_action;
	141	static int (bpf_lwt_seg6_adjust_srh)(void ctx, unsigned int offset,
	142	unsigned int len) =
	143	(void *) BPF_FUNC_lwt_seg6_adjust_srh;
6bdd533c SY	144	static int (bpf_rc_repeat)(void ctx) =
	145	(void *) BPF_FUNC_rc_repeat;
	146	static int (bpf_rc_keydown)(void ctx, unsigned int protocol,
	147	unsigned long long scancode, unsigned int toggle) =
	148	(void *) BPF_FUNC_rc_keydown;
c7ddbbaf YS	149	static unsigned long long (*bpf_get_current_cgroup_id)(void) =
c7ddbbaf YS	150	(void *) BPF_FUNC_get_current_cgroup_id;
d4c9f573 RG	151	static void (bpf_get_local_storage)(void *map, unsigned long long flags) =
d4c9f573 RG	152	(void *) BPF_FUNC_get_local_storage;
02f6ac74 AI	153	static unsigned long long (bpf_skb_cgroup_id)(void ctx) =
	154	(void *) BPF_FUNC_skb_cgroup_id;
	155	static unsigned long long (bpf_skb_ancestor_cgroup_id)(void ctx, int level) =
	156	(void *) BPF_FUNC_skb_ancestor_cgroup_id;
6acc9b43 JS	157	static struct bpf_sock (bpf_sk_lookup_tcp)(void *ctx,
6acc9b43 JS	158	struct bpf_sock_tuple *tuple,
f71c6143	159	int size, unsigned long long netns_id,
6acc9b43 JS	160	unsigned long long flags) =
	161	(void *) BPF_FUNC_sk_lookup_tcp;
	162	static struct bpf_sock (bpf_sk_lookup_udp)(void *ctx,
	163	struct bpf_sock_tuple *tuple,
f71c6143	164	int size, unsigned long long netns_id,
6acc9b43 JS	165	unsigned long long flags) =
	166	(void *) BPF_FUNC_sk_lookup_udp;
	167	static int (bpf_sk_release)(struct bpf_sock sk) =
	168	(void *) BPF_FUNC_sk_release;
4f775448 JDB	169	static int (bpf_skb_vlan_push)(void ctx, __be16 vlan_proto, __u16 vlan_tci) =
	170	(void *) BPF_FUNC_skb_vlan_push;
	171	static int (bpf_skb_vlan_pop)(void ctx) =
	172	(void *) BPF_FUNC_skb_vlan_pop;
01d3240a SY	173	static int (bpf_rc_pointer_rel)(void ctx, int rel_x, int rel_y) =
01d3240a SY	174	(void *) BPF_FUNC_rc_pointer_rel;
ab963beb AS	175	static void (bpf_spin_lock)(struct bpf_spin_lock lock) =
	176	(void *) BPF_FUNC_spin_lock;
	177	static void (bpf_spin_unlock)(struct bpf_spin_lock lock) =
	178	(void *) BPF_FUNC_spin_unlock;
e0b27b3f MKL	179	static struct bpf_sock (bpf_sk_fullsock)(struct bpf_sock *sk) =
	180	(void *) BPF_FUNC_sk_fullsock;
	181	static struct bpf_tcp_sock (bpf_tcp_sock)(struct bpf_sock *sk) =
	182	(void *) BPF_FUNC_tcp_sock;
7681e7b2 MKL	183	static struct bpf_sock (bpf_get_listener_sock)(struct bpf_sock *sk) =
7681e7b2 MKL	184	(void *) BPF_FUNC_get_listener_sock;
5cce85c6	185	static int (bpf_skb_ecn_set_ce)(void ctx) =
5cce85c6	186	(void *) BPF_FUNC_skb_ecn_set_ce;
249b812d AS	187
	188	/* llvm builtin functions that eBPF C program may use to
	189	* emit BPF_LD_ABS and BPF_LD_IND instructions
	190	*/
	191	struct sk_buff;
	192	unsigned long long load_byte(void *skb,
	193	unsigned long long off) asm("llvm.bpf.load.byte");
	194	unsigned long long load_half(void *skb,
	195	unsigned long long off) asm("llvm.bpf.load.half");
	196	unsigned long long load_word(void *skb,
	197	unsigned long long off) asm("llvm.bpf.load.word");
	198
	199	/* a helper structure used by eBPF C program
	200	* to describe map attributes to elf_bpf loader
	201	*/
	202	struct bpf_map_def {
	203	unsigned int type;
	204	unsigned int key_size;
	205	unsigned int value_size;
	206	unsigned int max_entries;
89b97607	207	unsigned int map_flags;
fb30d4b7	208	unsigned int inner_map_idx;
ad17d0e6	209	unsigned int numa_node;
249b812d AS	210	};
249b812d AS	211
38d5d3b3 MKL	212	#define BPF_ANNOTATE_KV_PAIR(name, type_key, type_val) \
	213	struct ____btf_map_##name { \
	214	type_key key; \
	215	type_val value; \
	216	}; \
	217	struct ____btf_map_##name \
	218	__attribute__ ((section(".maps." #name), used)) \
	219	____btf_map_##name = { }
	220
f74599f7 TG	221	static int (bpf_skb_load_bytes)(void ctx, int off, void *to, int len) =
f74599f7 TG	222	(void *) BPF_FUNC_skb_load_bytes;
91134d84 MKL	223	static int (bpf_skb_load_bytes_relative)(void ctx, int off, void *to, int len, __u32 start_header) =
91134d84 MKL	224	(void *) BPF_FUNC_skb_load_bytes_relative;
91bc4822 AS	225	static int (bpf_skb_store_bytes)(void ctx, int off, void *from, int len, int flags) =
	226	(void *) BPF_FUNC_skb_store_bytes;
	227	static int (bpf_l3_csum_replace)(void ctx, int off, int from, int to, int flags) =
	228	(void *) BPF_FUNC_l3_csum_replace;
	229	static int (bpf_l4_csum_replace)(void ctx, int off, int from, int to, int flags) =
	230	(void *) BPF_FUNC_l4_csum_replace;
c6ffd1ff NS	231	static int (bpf_csum_diff)(void from, int from_size, void *to, int to_size, int seed) =
c6ffd1ff NS	232	(void *) BPF_FUNC_csum_diff;
747ea55e DB	233	static int (bpf_skb_under_cgroup)(void ctx, void *map, int index) =
747ea55e DB	234	(void *) BPF_FUNC_skb_under_cgroup;
f74599f7 TG	235	static int (bpf_skb_change_head)(void , int len, int flags) =
f74599f7 TG	236	(void *) BPF_FUNC_skb_change_head;
82a86168 JF	237	static int (bpf_skb_pull_data)(void , int len) =
82a86168 JF	238	(void *) BPF_FUNC_skb_pull_data;
f2bb5388 WB	239	static unsigned int (bpf_get_cgroup_classid)(void ctx) =
	240	(void *) BPF_FUNC_get_cgroup_classid;
	241	static unsigned int (bpf_get_route_realm)(void ctx) =
	242	(void *) BPF_FUNC_get_route_realm;
	243	static int (bpf_skb_change_proto)(void ctx, __be16 proto, __u64 flags) =
	244	(void *) BPF_FUNC_skb_change_proto;
	245	static int (bpf_skb_change_type)(void ctx, __u32 type) =
	246	(void *) BPF_FUNC_skb_change_type;
	247	static unsigned int (bpf_get_hash_recalc)(void ctx) =
	248	(void *) BPF_FUNC_get_hash_recalc;
	249	static unsigned long long (bpf_get_current_task)(void ctx) =
	250	(void *) BPF_FUNC_get_current_task;
	251	static int (bpf_skb_change_tail)(void ctx, __u32 len, __u64 flags) =
	252	(void *) BPF_FUNC_skb_change_tail;
	253	static long long (bpf_csum_update)(void ctx, __u32 csum) =
	254	(void *) BPF_FUNC_csum_update;
	255	static void (bpf_set_hash_invalid)(void ctx) =
	256	(void *) BPF_FUNC_set_hash_invalid;
	257	static int (*bpf_get_numa_node_id)(void) =
	258	(void *) BPF_FUNC_get_numa_node_id;
	259	static int (bpf_probe_read_str)(void ctx, __u32 size,
	260	const void *unsafe_ptr) =
	261	(void *) BPF_FUNC_probe_read_str;
	262	static unsigned int (bpf_get_socket_uid)(void ctx) =
	263	(void *) BPF_FUNC_get_socket_uid;
	264	static unsigned int (bpf_set_hash)(void ctx, __u32 hash) =
	265	(void *) BPF_FUNC_set_hash;
	266	static int (bpf_skb_adjust_room)(void ctx, __s32 len_diff, __u32 mode,
	267	unsigned long long flags) =
	268	(void *) BPF_FUNC_skb_adjust_room;
91bc4822	269
b655fc1c JF	270	/* Scan the ARCH passed in from ARCH env variable (see Makefile) */
	271	#if defined(__TARGET_ARCH_x86)
	272	#define bpf_target_x86
	273	#define bpf_target_defined
	274	#elif defined(__TARGET_ARCH_s930x)
	275	#define bpf_target_s930x
	276	#define bpf_target_defined
	277	#elif defined(__TARGET_ARCH_arm64)
	278	#define bpf_target_arm64
	279	#define bpf_target_defined
	280	#elif defined(__TARGET_ARCH_mips)
	281	#define bpf_target_mips
	282	#define bpf_target_defined
	283	#elif defined(__TARGET_ARCH_powerpc)
	284	#define bpf_target_powerpc
	285	#define bpf_target_defined
	286	#elif defined(__TARGET_ARCH_sparc)
	287	#define bpf_target_sparc
	288	#define bpf_target_defined
	289	#else
	290	#undef bpf_target_defined
	291	#endif
	292
	293	/* Fall back to what the compiler says */
	294	#ifndef bpf_target_defined
d912557b	295	#if defined(__x86_64__)
b655fc1c JF	296	#define bpf_target_x86
	297	#elif defined(__s390x__)
	298	#define bpf_target_s930x
	299	#elif defined(__aarch64__)
	300	#define bpf_target_arm64
	301	#elif defined(__mips__)
	302	#define bpf_target_mips
	303	#elif defined(__powerpc__)
	304	#define bpf_target_powerpc
	305	#elif defined(__sparc__)
	306	#define bpf_target_sparc
	307	#endif
	308	#endif
	309
	310	#if defined(bpf_target_x86)
d912557b MH	311
	312	#define PT_REGS_PARM1(x) ((x)->di)
	313	#define PT_REGS_PARM2(x) ((x)->si)
	314	#define PT_REGS_PARM3(x) ((x)->dx)
	315	#define PT_REGS_PARM4(x) ((x)->cx)
	316	#define PT_REGS_PARM5(x) ((x)->r8)
	317	#define PT_REGS_RET(x) ((x)->sp)
	318	#define PT_REGS_FP(x) ((x)->bp)
	319	#define PT_REGS_RC(x) ((x)->ax)
	320	#define PT_REGS_SP(x) ((x)->sp)
138d6153	321	#define PT_REGS_IP(x) ((x)->ip)
d912557b	322
b655fc1c	323	#elif defined(bpf_target_s390x)
d912557b MH	324
	325	#define PT_REGS_PARM1(x) ((x)->gprs[2])
	326	#define PT_REGS_PARM2(x) ((x)->gprs[3])
	327	#define PT_REGS_PARM3(x) ((x)->gprs[4])
	328	#define PT_REGS_PARM4(x) ((x)->gprs[5])
	329	#define PT_REGS_PARM5(x) ((x)->gprs[6])
	330	#define PT_REGS_RET(x) ((x)->gprs[14])
	331	#define PT_REGS_FP(x) ((x)->gprs[11]) /* Works only with CONFIG_FRAME_POINTER */
	332	#define PT_REGS_RC(x) ((x)->gprs[2])
	333	#define PT_REGS_SP(x) ((x)->gprs[15])
2dbb4c05	334	#define PT_REGS_IP(x) ((x)->psw.addr)
d912557b	335
b655fc1c	336	#elif defined(bpf_target_arm64)
85ff8a43 YS	337
	338	#define PT_REGS_PARM1(x) ((x)->regs[0])
	339	#define PT_REGS_PARM2(x) ((x)->regs[1])
	340	#define PT_REGS_PARM3(x) ((x)->regs[2])
	341	#define PT_REGS_PARM4(x) ((x)->regs[3])
	342	#define PT_REGS_PARM5(x) ((x)->regs[4])
	343	#define PT_REGS_RET(x) ((x)->regs[30])
	344	#define PT_REGS_FP(x) ((x)->regs[29]) /* Works only with CONFIG_FRAME_POINTER */
	345	#define PT_REGS_RC(x) ((x)->regs[0])
	346	#define PT_REGS_SP(x) ((x)->sp)
138d6153 NR	347	#define PT_REGS_IP(x) ((x)->pc)
138d6153 NR	348
b655fc1c	349	#elif defined(bpf_target_mips)
c1932cdb DD	350
	351	#define PT_REGS_PARM1(x) ((x)->regs[4])
	352	#define PT_REGS_PARM2(x) ((x)->regs[5])
	353	#define PT_REGS_PARM3(x) ((x)->regs[6])
	354	#define PT_REGS_PARM4(x) ((x)->regs[7])
	355	#define PT_REGS_PARM5(x) ((x)->regs[8])
	356	#define PT_REGS_RET(x) ((x)->regs[31])
	357	#define PT_REGS_FP(x) ((x)->regs[30]) /* Works only with CONFIG_FRAME_POINTER */
	358	#define PT_REGS_RC(x) ((x)->regs[1])
	359	#define PT_REGS_SP(x) ((x)->regs[29])
	360	#define PT_REGS_IP(x) ((x)->cp0_epc)
	361
b655fc1c	362	#elif defined(bpf_target_powerpc)
138d6153 NR	363
	364	#define PT_REGS_PARM1(x) ((x)->gpr[3])
	365	#define PT_REGS_PARM2(x) ((x)->gpr[4])
	366	#define PT_REGS_PARM3(x) ((x)->gpr[5])
	367	#define PT_REGS_PARM4(x) ((x)->gpr[6])
	368	#define PT_REGS_PARM5(x) ((x)->gpr[7])
	369	#define PT_REGS_RC(x) ((x)->gpr[3])
	370	#define PT_REGS_SP(x) ((x)->sp)
	371	#define PT_REGS_IP(x) ((x)->nip)
85ff8a43	372
b655fc1c	373	#elif defined(bpf_target_sparc)
b0c47807 DM	374
	375	#define PT_REGS_PARM1(x) ((x)->u_regs[UREG_I0])
	376	#define PT_REGS_PARM2(x) ((x)->u_regs[UREG_I1])
	377	#define PT_REGS_PARM3(x) ((x)->u_regs[UREG_I2])
	378	#define PT_REGS_PARM4(x) ((x)->u_regs[UREG_I3])
	379	#define PT_REGS_PARM5(x) ((x)->u_regs[UREG_I4])
	380	#define PT_REGS_RET(x) ((x)->u_regs[UREG_I7])
	381	#define PT_REGS_RC(x) ((x)->u_regs[UREG_I0])
	382	#define PT_REGS_SP(x) ((x)->u_regs[UREG_FP])
b655fc1c JF	383
b655fc1c JF	384	/* Should this also be a bpf_target check for the sparc case? */
b0c47807 DM	385	#if defined(__arch64__)
	386	#define PT_REGS_IP(x) ((x)->tpc)
	387	#else
	388	#define PT_REGS_IP(x) ((x)->pc)
	389	#endif
	390
d912557b	391	#endif
138d6153	392
b655fc1c	393	#ifdef bpf_target_powerpc
138d6153 NR	394	#define BPF_KPROBE_READ_RET_IP(ip, ctx) ({ (ip) = (ctx)->link; })
138d6153 NR	395	#define BPF_KRETPROBE_READ_RET_IP BPF_KPROBE_READ_RET_IP
b655fc1c	396	#elif bpf_target_sparc
b0c47807 DM	397	#define BPF_KPROBE_READ_RET_IP(ip, ctx) ({ (ip) = PT_REGS_RET(ctx); })
b0c47807 DM	398	#define BPF_KRETPROBE_READ_RET_IP BPF_KPROBE_READ_RET_IP
138d6153 NR	399	#else
	400	#define BPF_KPROBE_READ_RET_IP(ip, ctx) ({ \
	401	bpf_probe_read(&(ip), sizeof(ip), (void *)PT_REGS_RET(ctx)); })
	402	#define BPF_KRETPROBE_READ_RET_IP(ip, ctx) ({ \
	403	bpf_probe_read(&(ip), sizeof(ip), \
	404	(void *)(PT_REGS_FP(ctx) + sizeof(ip))); })
	405	#endif
	406
249b812d	407	#endif