tools/testing/selftests/bpf/bpf

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This source file includes following definitions.
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   1 /* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
   2 #ifndef __BPF_HELPERS__
   3 #define __BPF_HELPERS__
   4 
   5 #define __uint(name, val) int (*name)[val]
   6 #define __type(name, val) typeof(val) *name
   7 
   8 /* helper macro to print out debug messages */
   9 #define bpf_printk(fmt, ...)                            \
  10 ({                                                      \
  11         char ____fmt[] = fmt;                           \
  12         bpf_trace_printk(____fmt, sizeof(____fmt),      \
  13                          ##__VA_ARGS__);                \
  14 })
  15 
  16 #ifdef __clang__
  17 
  18 /* helper macro to place programs, maps, license in
  19  * different sections in elf_bpf file. Section names
  20  * are interpreted by elf_bpf loader
  21  */
  22 #define SEC(NAME) __attribute__((section(NAME), used))
  23 
  24 /* helper functions called from eBPF programs written in C */
  25 static void *(*bpf_map_lookup_elem)(void *map, const void *key) =
  26         (void *) BPF_FUNC_map_lookup_elem;
  27 static int (*bpf_map_update_elem)(void *map, const void *key, const void *value,
  28                                   unsigned long long flags) =
  29         (void *) BPF_FUNC_map_update_elem;
  30 static int (*bpf_map_delete_elem)(void *map, const void *key) =
  31         (void *) BPF_FUNC_map_delete_elem;
  32 static int (*bpf_map_push_elem)(void *map, const void *value,
  33                                 unsigned long long flags) =
  34         (void *) BPF_FUNC_map_push_elem;
  35 static int (*bpf_map_pop_elem)(void *map, void *value) =
  36         (void *) BPF_FUNC_map_pop_elem;
  37 static int (*bpf_map_peek_elem)(void *map, void *value) =
  38         (void *) BPF_FUNC_map_peek_elem;
  39 static int (*bpf_probe_read)(void *dst, int size, const void *unsafe_ptr) =
  40         (void *) BPF_FUNC_probe_read;
  41 static unsigned long long (*bpf_ktime_get_ns)(void) =
  42         (void *) BPF_FUNC_ktime_get_ns;
  43 static int (*bpf_trace_printk)(const char *fmt, int fmt_size, ...) =
  44         (void *) BPF_FUNC_trace_printk;
  45 static void (*bpf_tail_call)(void *ctx, void *map, int index) =
  46         (void *) BPF_FUNC_tail_call;
  47 static unsigned long long (*bpf_get_smp_processor_id)(void) =
  48         (void *) BPF_FUNC_get_smp_processor_id;
  49 static unsigned long long (*bpf_get_current_pid_tgid)(void) =
  50         (void *) BPF_FUNC_get_current_pid_tgid;
  51 static unsigned long long (*bpf_get_current_uid_gid)(void) =
  52         (void *) BPF_FUNC_get_current_uid_gid;
  53 static int (*bpf_get_current_comm)(void *buf, int buf_size) =
  54         (void *) BPF_FUNC_get_current_comm;
  55 static unsigned long long (*bpf_perf_event_read)(void *map,
  56                                                  unsigned long long flags) =
  57         (void *) BPF_FUNC_perf_event_read;
  58 static int (*bpf_clone_redirect)(void *ctx, int ifindex, int flags) =
  59         (void *) BPF_FUNC_clone_redirect;
  60 static int (*bpf_redirect)(int ifindex, int flags) =
  61         (void *) BPF_FUNC_redirect;
  62 static int (*bpf_redirect_map)(void *map, int key, int flags) =
  63         (void *) BPF_FUNC_redirect_map;
  64 static int (*bpf_perf_event_output)(void *ctx, void *map,
  65                                     unsigned long long flags, void *data,
  66                                     int size) =
  67         (void *) BPF_FUNC_perf_event_output;
  68 static int (*bpf_get_stackid)(void *ctx, void *map, int flags) =
  69         (void *) BPF_FUNC_get_stackid;
  70 static int (*bpf_probe_write_user)(void *dst, const void *src, int size) =
  71         (void *) BPF_FUNC_probe_write_user;
  72 static int (*bpf_current_task_under_cgroup)(void *map, int index) =
  73         (void *) BPF_FUNC_current_task_under_cgroup;
  74 static int (*bpf_skb_get_tunnel_key)(void *ctx, void *key, int size, int flags) =
  75         (void *) BPF_FUNC_skb_get_tunnel_key;
  76 static int (*bpf_skb_set_tunnel_key)(void *ctx, void *key, int size, int flags) =
  77         (void *) BPF_FUNC_skb_set_tunnel_key;
  78 static int (*bpf_skb_get_tunnel_opt)(void *ctx, void *md, int size) =
  79         (void *) BPF_FUNC_skb_get_tunnel_opt;
  80 static int (*bpf_skb_set_tunnel_opt)(void *ctx, void *md, int size) =
  81         (void *) BPF_FUNC_skb_set_tunnel_opt;
  82 static unsigned long long (*bpf_get_prandom_u32)(void) =
  83         (void *) BPF_FUNC_get_prandom_u32;
  84 static int (*bpf_xdp_adjust_head)(void *ctx, int offset) =
  85         (void *) BPF_FUNC_xdp_adjust_head;
  86 static int (*bpf_xdp_adjust_meta)(void *ctx, int offset) =
  87         (void *) BPF_FUNC_xdp_adjust_meta;
  88 static int (*bpf_get_socket_cookie)(void *ctx) =
  89         (void *) BPF_FUNC_get_socket_cookie;
  90 static int (*bpf_setsockopt)(void *ctx, int level, int optname, void *optval,
  91                              int optlen) =
  92         (void *) BPF_FUNC_setsockopt;
  93 static int (*bpf_getsockopt)(void *ctx, int level, int optname, void *optval,
  94                              int optlen) =
  95         (void *) BPF_FUNC_getsockopt;
  96 static int (*bpf_sock_ops_cb_flags_set)(void *ctx, int flags) =
  97         (void *) BPF_FUNC_sock_ops_cb_flags_set;
  98 static int (*bpf_sk_redirect_map)(void *ctx, void *map, int key, int flags) =
  99         (void *) BPF_FUNC_sk_redirect_map;
 100 static int (*bpf_sk_redirect_hash)(void *ctx, void *map, void *key, int flags) =
 101         (void *) BPF_FUNC_sk_redirect_hash;
 102 static int (*bpf_sock_map_update)(void *map, void *key, void *value,
 103                                   unsigned long long flags) =
 104         (void *) BPF_FUNC_sock_map_update;
 105 static int (*bpf_sock_hash_update)(void *map, void *key, void *value,
 106                                    unsigned long long flags) =
 107         (void *) BPF_FUNC_sock_hash_update;
 108 static int (*bpf_perf_event_read_value)(void *map, unsigned long long flags,
 109                                         void *buf, unsigned int buf_size) =
 110         (void *) BPF_FUNC_perf_event_read_value;
 111 static int (*bpf_perf_prog_read_value)(void *ctx, void *buf,
 112                                        unsigned int buf_size) =
 113         (void *) BPF_FUNC_perf_prog_read_value;
 114 static int (*bpf_override_return)(void *ctx, unsigned long rc) =
 115         (void *) BPF_FUNC_override_return;
 116 static int (*bpf_msg_redirect_map)(void *ctx, void *map, int key, int flags) =
 117         (void *) BPF_FUNC_msg_redirect_map;
 118 static int (*bpf_msg_redirect_hash)(void *ctx,
 119                                     void *map, void *key, int flags) =
 120         (void *) BPF_FUNC_msg_redirect_hash;
 121 static int (*bpf_msg_apply_bytes)(void *ctx, int len) =
 122         (void *) BPF_FUNC_msg_apply_bytes;
 123 static int (*bpf_msg_cork_bytes)(void *ctx, int len) =
 124         (void *) BPF_FUNC_msg_cork_bytes;
 125 static int (*bpf_msg_pull_data)(void *ctx, int start, int end, int flags) =
 126         (void *) BPF_FUNC_msg_pull_data;
 127 static int (*bpf_msg_push_data)(void *ctx, int start, int end, int flags) =
 128         (void *) BPF_FUNC_msg_push_data;
 129 static int (*bpf_msg_pop_data)(void *ctx, int start, int cut, int flags) =
 130         (void *) BPF_FUNC_msg_pop_data;
 131 static int (*bpf_bind)(void *ctx, void *addr, int addr_len) =
 132         (void *) BPF_FUNC_bind;
 133 static int (*bpf_xdp_adjust_tail)(void *ctx, int offset) =
 134         (void *) BPF_FUNC_xdp_adjust_tail;
 135 static int (*bpf_skb_get_xfrm_state)(void *ctx, int index, void *state,
 136                                      int size, int flags) =
 137         (void *) BPF_FUNC_skb_get_xfrm_state;
 138 static int (*bpf_sk_select_reuseport)(void *ctx, void *map, void *key, __u32 flags) =
 139         (void *) BPF_FUNC_sk_select_reuseport;
 140 static int (*bpf_get_stack)(void *ctx, void *buf, int size, int flags) =
 141         (void *) BPF_FUNC_get_stack;
 142 static int (*bpf_fib_lookup)(void *ctx, struct bpf_fib_lookup *params,
 143                              int plen, __u32 flags) =
 144         (void *) BPF_FUNC_fib_lookup;
 145 static int (*bpf_lwt_push_encap)(void *ctx, unsigned int type, void *hdr,
 146                                  unsigned int len) =
 147         (void *) BPF_FUNC_lwt_push_encap;
 148 static int (*bpf_lwt_seg6_store_bytes)(void *ctx, unsigned int offset,
 149                                        void *from, unsigned int len) =
 150         (void *) BPF_FUNC_lwt_seg6_store_bytes;
 151 static int (*bpf_lwt_seg6_action)(void *ctx, unsigned int action, void *param,
 152                                   unsigned int param_len) =
 153         (void *) BPF_FUNC_lwt_seg6_action;
 154 static int (*bpf_lwt_seg6_adjust_srh)(void *ctx, unsigned int offset,
 155                                       unsigned int len) =
 156         (void *) BPF_FUNC_lwt_seg6_adjust_srh;
 157 static int (*bpf_rc_repeat)(void *ctx) =
 158         (void *) BPF_FUNC_rc_repeat;
 159 static int (*bpf_rc_keydown)(void *ctx, unsigned int protocol,
 160                              unsigned long long scancode, unsigned int toggle) =
 161         (void *) BPF_FUNC_rc_keydown;
 162 static unsigned long long (*bpf_get_current_cgroup_id)(void) =
 163         (void *) BPF_FUNC_get_current_cgroup_id;
 164 static void *(*bpf_get_local_storage)(void *map, unsigned long long flags) =
 165         (void *) BPF_FUNC_get_local_storage;
 166 static unsigned long long (*bpf_skb_cgroup_id)(void *ctx) =
 167         (void *) BPF_FUNC_skb_cgroup_id;
 168 static unsigned long long (*bpf_skb_ancestor_cgroup_id)(void *ctx, int level) =
 169         (void *) BPF_FUNC_skb_ancestor_cgroup_id;
 170 static struct bpf_sock *(*bpf_sk_lookup_tcp)(void *ctx,
 171                                              struct bpf_sock_tuple *tuple,
 172                                              int size, unsigned long long netns_id,
 173                                              unsigned long long flags) =
 174         (void *) BPF_FUNC_sk_lookup_tcp;
 175 static struct bpf_sock *(*bpf_skc_lookup_tcp)(void *ctx,
 176                                              struct bpf_sock_tuple *tuple,
 177                                              int size, unsigned long long netns_id,
 178                                              unsigned long long flags) =
 179         (void *) BPF_FUNC_skc_lookup_tcp;
 180 static struct bpf_sock *(*bpf_sk_lookup_udp)(void *ctx,
 181                                              struct bpf_sock_tuple *tuple,
 182                                              int size, unsigned long long netns_id,
 183                                              unsigned long long flags) =
 184         (void *) BPF_FUNC_sk_lookup_udp;
 185 static int (*bpf_sk_release)(struct bpf_sock *sk) =
 186         (void *) BPF_FUNC_sk_release;
 187 static int (*bpf_skb_vlan_push)(void *ctx, __be16 vlan_proto, __u16 vlan_tci) =
 188         (void *) BPF_FUNC_skb_vlan_push;
 189 static int (*bpf_skb_vlan_pop)(void *ctx) =
 190         (void *) BPF_FUNC_skb_vlan_pop;
 191 static int (*bpf_rc_pointer_rel)(void *ctx, int rel_x, int rel_y) =
 192         (void *) BPF_FUNC_rc_pointer_rel;
 193 static void (*bpf_spin_lock)(struct bpf_spin_lock *lock) =
 194         (void *) BPF_FUNC_spin_lock;
 195 static void (*bpf_spin_unlock)(struct bpf_spin_lock *lock) =
 196         (void *) BPF_FUNC_spin_unlock;
 197 static struct bpf_sock *(*bpf_sk_fullsock)(struct bpf_sock *sk) =
 198         (void *) BPF_FUNC_sk_fullsock;
 199 static struct bpf_tcp_sock *(*bpf_tcp_sock)(struct bpf_sock *sk) =
 200         (void *) BPF_FUNC_tcp_sock;
 201 static struct bpf_sock *(*bpf_get_listener_sock)(struct bpf_sock *sk) =
 202         (void *) BPF_FUNC_get_listener_sock;
 203 static int (*bpf_skb_ecn_set_ce)(void *ctx) =
 204         (void *) BPF_FUNC_skb_ecn_set_ce;
 205 static int (*bpf_tcp_check_syncookie)(struct bpf_sock *sk,
 206             void *ip, int ip_len, void *tcp, int tcp_len) =
 207         (void *) BPF_FUNC_tcp_check_syncookie;
 208 static int (*bpf_sysctl_get_name)(void *ctx, char *buf,
 209                                   unsigned long long buf_len,
 210                                   unsigned long long flags) =
 211         (void *) BPF_FUNC_sysctl_get_name;
 212 static int (*bpf_sysctl_get_current_value)(void *ctx, char *buf,
 213                                            unsigned long long buf_len) =
 214         (void *) BPF_FUNC_sysctl_get_current_value;
 215 static int (*bpf_sysctl_get_new_value)(void *ctx, char *buf,
 216                                        unsigned long long buf_len) =
 217         (void *) BPF_FUNC_sysctl_get_new_value;
 218 static int (*bpf_sysctl_set_new_value)(void *ctx, const char *buf,
 219                                        unsigned long long buf_len) =
 220         (void *) BPF_FUNC_sysctl_set_new_value;
 221 static int (*bpf_strtol)(const char *buf, unsigned long long buf_len,
 222                          unsigned long long flags, long *res) =
 223         (void *) BPF_FUNC_strtol;
 224 static int (*bpf_strtoul)(const char *buf, unsigned long long buf_len,
 225                           unsigned long long flags, unsigned long *res) =
 226         (void *) BPF_FUNC_strtoul;
 227 static void *(*bpf_sk_storage_get)(void *map, struct bpf_sock *sk,
 228                                    void *value, __u64 flags) =
 229         (void *) BPF_FUNC_sk_storage_get;
 230 static int (*bpf_sk_storage_delete)(void *map, struct bpf_sock *sk) =
 231         (void *)BPF_FUNC_sk_storage_delete;
 232 static int (*bpf_send_signal)(unsigned sig) = (void *)BPF_FUNC_send_signal;
 233 static long long (*bpf_tcp_gen_syncookie)(struct bpf_sock *sk, void *ip,
 234                                           int ip_len, void *tcp, int tcp_len) =
 235         (void *) BPF_FUNC_tcp_gen_syncookie;
 236 
 237 /* llvm builtin functions that eBPF C program may use to
 238  * emit BPF_LD_ABS and BPF_LD_IND instructions
 239  */
 240 struct sk_buff;
 241 unsigned long long load_byte(void *skb,
 242                              unsigned long long off) asm("llvm.bpf.load.byte");
 243 unsigned long long load_half(void *skb,
 244                              unsigned long long off) asm("llvm.bpf.load.half");
 245 unsigned long long load_word(void *skb,
 246                              unsigned long long off) asm("llvm.bpf.load.word");
 247 
 248 /* a helper structure used by eBPF C program
 249  * to describe map attributes to elf_bpf loader
 250  */
 251 struct bpf_map_def {
 252         unsigned int type;
 253         unsigned int key_size;
 254         unsigned int value_size;
 255         unsigned int max_entries;
 256         unsigned int map_flags;
 257         unsigned int inner_map_idx;
 258         unsigned int numa_node;
 259 };
 260 
 261 #else
 262 
 263 #include <bpf-helpers.h>
 264 
 265 #endif
 266 
 267 #define BPF_ANNOTATE_KV_PAIR(name, type_key, type_val)          \
 268         struct ____btf_map_##name {                             \
 269                 type_key key;                                   \
 270                 type_val value;                                 \
 271         };                                                      \
 272         struct ____btf_map_##name                               \
 273         __attribute__ ((section(".maps." #name), used))         \
 274                 ____btf_map_##name = { }
 275 
 276 static int (*bpf_skb_load_bytes)(void *ctx, int off, void *to, int len) =
 277         (void *) BPF_FUNC_skb_load_bytes;
 278 static int (*bpf_skb_load_bytes_relative)(void *ctx, int off, void *to, int len, __u32 start_header) =
 279         (void *) BPF_FUNC_skb_load_bytes_relative;
 280 static int (*bpf_skb_store_bytes)(void *ctx, int off, void *from, int len, int flags) =
 281         (void *) BPF_FUNC_skb_store_bytes;
 282 static int (*bpf_l3_csum_replace)(void *ctx, int off, int from, int to, int flags) =
 283         (void *) BPF_FUNC_l3_csum_replace;
 284 static int (*bpf_l4_csum_replace)(void *ctx, int off, int from, int to, int flags) =
 285         (void *) BPF_FUNC_l4_csum_replace;
 286 static int (*bpf_csum_diff)(void *from, int from_size, void *to, int to_size, int seed) =
 287         (void *) BPF_FUNC_csum_diff;
 288 static int (*bpf_skb_under_cgroup)(void *ctx, void *map, int index) =
 289         (void *) BPF_FUNC_skb_under_cgroup;
 290 static int (*bpf_skb_change_head)(void *, int len, int flags) =
 291         (void *) BPF_FUNC_skb_change_head;
 292 static int (*bpf_skb_pull_data)(void *, int len) =
 293         (void *) BPF_FUNC_skb_pull_data;
 294 static unsigned int (*bpf_get_cgroup_classid)(void *ctx) =
 295         (void *) BPF_FUNC_get_cgroup_classid;
 296 static unsigned int (*bpf_get_route_realm)(void *ctx) =
 297         (void *) BPF_FUNC_get_route_realm;
 298 static int (*bpf_skb_change_proto)(void *ctx, __be16 proto, __u64 flags) =
 299         (void *) BPF_FUNC_skb_change_proto;
 300 static int (*bpf_skb_change_type)(void *ctx, __u32 type) =
 301         (void *) BPF_FUNC_skb_change_type;
 302 static unsigned int (*bpf_get_hash_recalc)(void *ctx) =
 303         (void *) BPF_FUNC_get_hash_recalc;
 304 static unsigned long long (*bpf_get_current_task)(void) =
 305         (void *) BPF_FUNC_get_current_task;
 306 static int (*bpf_skb_change_tail)(void *ctx, __u32 len, __u64 flags) =
 307         (void *) BPF_FUNC_skb_change_tail;
 308 static long long (*bpf_csum_update)(void *ctx, __u32 csum) =
 309         (void *) BPF_FUNC_csum_update;
 310 static void (*bpf_set_hash_invalid)(void *ctx) =
 311         (void *) BPF_FUNC_set_hash_invalid;
 312 static int (*bpf_get_numa_node_id)(void) =
 313         (void *) BPF_FUNC_get_numa_node_id;
 314 static int (*bpf_probe_read_str)(void *ctx, __u32 size,
 315                                  const void *unsafe_ptr) =
 316         (void *) BPF_FUNC_probe_read_str;
 317 static unsigned int (*bpf_get_socket_uid)(void *ctx) =
 318         (void *) BPF_FUNC_get_socket_uid;
 319 static unsigned int (*bpf_set_hash)(void *ctx, __u32 hash) =
 320         (void *) BPF_FUNC_set_hash;
 321 static int (*bpf_skb_adjust_room)(void *ctx, __s32 len_diff, __u32 mode,
 322                                   unsigned long long flags) =
 323         (void *) BPF_FUNC_skb_adjust_room;
 324 
 325 /* Scan the ARCH passed in from ARCH env variable (see Makefile) */
 326 #if defined(__TARGET_ARCH_x86)
 327         #define bpf_target_x86
 328         #define bpf_target_defined
 329 #elif defined(__TARGET_ARCH_s390)
 330         #define bpf_target_s390
 331         #define bpf_target_defined
 332 #elif defined(__TARGET_ARCH_arm)
 333         #define bpf_target_arm
 334         #define bpf_target_defined
 335 #elif defined(__TARGET_ARCH_arm64)
 336         #define bpf_target_arm64
 337         #define bpf_target_defined
 338 #elif defined(__TARGET_ARCH_mips)
 339         #define bpf_target_mips
 340         #define bpf_target_defined
 341 #elif defined(__TARGET_ARCH_powerpc)
 342         #define bpf_target_powerpc
 343         #define bpf_target_defined
 344 #elif defined(__TARGET_ARCH_sparc)
 345         #define bpf_target_sparc
 346         #define bpf_target_defined
 347 #else
 348         #undef bpf_target_defined
 349 #endif
 350 
 351 /* Fall back to what the compiler says */
 352 #ifndef bpf_target_defined
 353 #if defined(__x86_64__)
 354         #define bpf_target_x86
 355 #elif defined(__s390__)
 356         #define bpf_target_s390
 357 #elif defined(__arm__)
 358         #define bpf_target_arm
 359 #elif defined(__aarch64__)
 360         #define bpf_target_arm64
 361 #elif defined(__mips__)
 362         #define bpf_target_mips
 363 #elif defined(__powerpc__)
 364         #define bpf_target_powerpc
 365 #elif defined(__sparc__)
 366         #define bpf_target_sparc
 367 #endif
 368 #endif
 369 
 370 #if defined(bpf_target_x86)
 371 
 372 #ifdef __KERNEL__
 373 #define PT_REGS_PARM1(x) ((x)->di)
 374 #define PT_REGS_PARM2(x) ((x)->si)
 375 #define PT_REGS_PARM3(x) ((x)->dx)
 376 #define PT_REGS_PARM4(x) ((x)->cx)
 377 #define PT_REGS_PARM5(x) ((x)->r8)
 378 #define PT_REGS_RET(x) ((x)->sp)
 379 #define PT_REGS_FP(x) ((x)->bp)
 380 #define PT_REGS_RC(x) ((x)->ax)
 381 #define PT_REGS_SP(x) ((x)->sp)
 382 #define PT_REGS_IP(x) ((x)->ip)
 383 #else
 384 #ifdef __i386__
 385 /* i386 kernel is built with -mregparm=3 */
 386 #define PT_REGS_PARM1(x) ((x)->eax)
 387 #define PT_REGS_PARM2(x) ((x)->edx)
 388 #define PT_REGS_PARM3(x) ((x)->ecx)
 389 #define PT_REGS_PARM4(x) 0
 390 #define PT_REGS_PARM5(x) 0
 391 #define PT_REGS_RET(x) ((x)->esp)
 392 #define PT_REGS_FP(x) ((x)->ebp)
 393 #define PT_REGS_RC(x) ((x)->eax)
 394 #define PT_REGS_SP(x) ((x)->esp)
 395 #define PT_REGS_IP(x) ((x)->eip)
 396 #else
 397 #define PT_REGS_PARM1(x) ((x)->rdi)
 398 #define PT_REGS_PARM2(x) ((x)->rsi)
 399 #define PT_REGS_PARM3(x) ((x)->rdx)
 400 #define PT_REGS_PARM4(x) ((x)->rcx)
 401 #define PT_REGS_PARM5(x) ((x)->r8)
 402 #define PT_REGS_RET(x) ((x)->rsp)
 403 #define PT_REGS_FP(x) ((x)->rbp)
 404 #define PT_REGS_RC(x) ((x)->rax)
 405 #define PT_REGS_SP(x) ((x)->rsp)
 406 #define PT_REGS_IP(x) ((x)->rip)
 407 #endif
 408 #endif
 409 
 410 #elif defined(bpf_target_s390)
 411 
 412 /* s390 provides user_pt_regs instead of struct pt_regs to userspace */
 413 struct pt_regs;
 414 #define PT_REGS_S390 const volatile user_pt_regs
 415 #define PT_REGS_PARM1(x) (((PT_REGS_S390 *)(x))->gprs[2])
 416 #define PT_REGS_PARM2(x) (((PT_REGS_S390 *)(x))->gprs[3])
 417 #define PT_REGS_PARM3(x) (((PT_REGS_S390 *)(x))->gprs[4])
 418 #define PT_REGS_PARM4(x) (((PT_REGS_S390 *)(x))->gprs[5])
 419 #define PT_REGS_PARM5(x) (((PT_REGS_S390 *)(x))->gprs[6])
 420 #define PT_REGS_RET(x) (((PT_REGS_S390 *)(x))->gprs[14])
 421 /* Works only with CONFIG_FRAME_POINTER */
 422 #define PT_REGS_FP(x) (((PT_REGS_S390 *)(x))->gprs[11])
 423 #define PT_REGS_RC(x) (((PT_REGS_S390 *)(x))->gprs[2])
 424 #define PT_REGS_SP(x) (((PT_REGS_S390 *)(x))->gprs[15])
 425 #define PT_REGS_IP(x) (((PT_REGS_S390 *)(x))->psw.addr)
 426 
 427 #elif defined(bpf_target_arm)
 428 
 429 #define PT_REGS_PARM1(x) ((x)->uregs[0])
 430 #define PT_REGS_PARM2(x) ((x)->uregs[1])
 431 #define PT_REGS_PARM3(x) ((x)->uregs[2])
 432 #define PT_REGS_PARM4(x) ((x)->uregs[3])
 433 #define PT_REGS_PARM5(x) ((x)->uregs[4])
 434 #define PT_REGS_RET(x) ((x)->uregs[14])
 435 #define PT_REGS_FP(x) ((x)->uregs[11]) /* Works only with CONFIG_FRAME_POINTER */
 436 #define PT_REGS_RC(x) ((x)->uregs[0])
 437 #define PT_REGS_SP(x) ((x)->uregs[13])
 438 #define PT_REGS_IP(x) ((x)->uregs[12])
 439 
 440 #elif defined(bpf_target_arm64)
 441 
 442 /* arm64 provides struct user_pt_regs instead of struct pt_regs to userspace */
 443 struct pt_regs;
 444 #define PT_REGS_ARM64 const volatile struct user_pt_regs
 445 #define PT_REGS_PARM1(x) (((PT_REGS_ARM64 *)(x))->regs[0])
 446 #define PT_REGS_PARM2(x) (((PT_REGS_ARM64 *)(x))->regs[1])
 447 #define PT_REGS_PARM3(x) (((PT_REGS_ARM64 *)(x))->regs[2])
 448 #define PT_REGS_PARM4(x) (((PT_REGS_ARM64 *)(x))->regs[3])
 449 #define PT_REGS_PARM5(x) (((PT_REGS_ARM64 *)(x))->regs[4])
 450 #define PT_REGS_RET(x) (((PT_REGS_ARM64 *)(x))->regs[30])
 451 /* Works only with CONFIG_FRAME_POINTER */
 452 #define PT_REGS_FP(x) (((PT_REGS_ARM64 *)(x))->regs[29])
 453 #define PT_REGS_RC(x) (((PT_REGS_ARM64 *)(x))->regs[0])
 454 #define PT_REGS_SP(x) (((PT_REGS_ARM64 *)(x))->sp)
 455 #define PT_REGS_IP(x) (((PT_REGS_ARM64 *)(x))->pc)
 456 
 457 #elif defined(bpf_target_mips)
 458 
 459 #define PT_REGS_PARM1(x) ((x)->regs[4])
 460 #define PT_REGS_PARM2(x) ((x)->regs[5])
 461 #define PT_REGS_PARM3(x) ((x)->regs[6])
 462 #define PT_REGS_PARM4(x) ((x)->regs[7])
 463 #define PT_REGS_PARM5(x) ((x)->regs[8])
 464 #define PT_REGS_RET(x) ((x)->regs[31])
 465 #define PT_REGS_FP(x) ((x)->regs[30]) /* Works only with CONFIG_FRAME_POINTER */
 466 #define PT_REGS_RC(x) ((x)->regs[1])
 467 #define PT_REGS_SP(x) ((x)->regs[29])
 468 #define PT_REGS_IP(x) ((x)->cp0_epc)
 469 
 470 #elif defined(bpf_target_powerpc)
 471 
 472 #define PT_REGS_PARM1(x) ((x)->gpr[3])
 473 #define PT_REGS_PARM2(x) ((x)->gpr[4])
 474 #define PT_REGS_PARM3(x) ((x)->gpr[5])
 475 #define PT_REGS_PARM4(x) ((x)->gpr[6])
 476 #define PT_REGS_PARM5(x) ((x)->gpr[7])
 477 #define PT_REGS_RC(x) ((x)->gpr[3])
 478 #define PT_REGS_SP(x) ((x)->sp)
 479 #define PT_REGS_IP(x) ((x)->nip)
 480 
 481 #elif defined(bpf_target_sparc)
 482 
 483 #define PT_REGS_PARM1(x) ((x)->u_regs[UREG_I0])
 484 #define PT_REGS_PARM2(x) ((x)->u_regs[UREG_I1])
 485 #define PT_REGS_PARM3(x) ((x)->u_regs[UREG_I2])
 486 #define PT_REGS_PARM4(x) ((x)->u_regs[UREG_I3])
 487 #define PT_REGS_PARM5(x) ((x)->u_regs[UREG_I4])
 488 #define PT_REGS_RET(x) ((x)->u_regs[UREG_I7])
 489 #define PT_REGS_RC(x) ((x)->u_regs[UREG_I0])
 490 #define PT_REGS_SP(x) ((x)->u_regs[UREG_FP])
 491 
 492 /* Should this also be a bpf_target check for the sparc case? */
 493 #if defined(__arch64__)
 494 #define PT_REGS_IP(x) ((x)->tpc)
 495 #else
 496 #define PT_REGS_IP(x) ((x)->pc)
 497 #endif
 498 
 499 #endif
 500 
 501 #if defined(bpf_target_powerpc)
 502 #define BPF_KPROBE_READ_RET_IP(ip, ctx)         ({ (ip) = (ctx)->link; })
 503 #define BPF_KRETPROBE_READ_RET_IP               BPF_KPROBE_READ_RET_IP
 504 #elif defined(bpf_target_sparc)
 505 #define BPF_KPROBE_READ_RET_IP(ip, ctx)         ({ (ip) = PT_REGS_RET(ctx); })
 506 #define BPF_KRETPROBE_READ_RET_IP               BPF_KPROBE_READ_RET_IP
 507 #else
 508 #define BPF_KPROBE_READ_RET_IP(ip, ctx)         ({                              \
 509                 bpf_probe_read(&(ip), sizeof(ip), (void *)PT_REGS_RET(ctx)); })
 510 #define BPF_KRETPROBE_READ_RET_IP(ip, ctx)      ({                              \
 511                 bpf_probe_read(&(ip), sizeof(ip),                               \
 512                                 (void *)(PT_REGS_FP(ctx) + sizeof(ip))); })
 513 #endif
 514 
 515 /*
 516  * BPF_CORE_READ abstracts away bpf_probe_read() call and captures offset
 517  * relocation for source address using __builtin_preserve_access_index()
 518  * built-in, provided by Clang.
 519  *
 520  * __builtin_preserve_access_index() takes as an argument an expression of
 521  * taking an address of a field within struct/union. It makes compiler emit
 522  * a relocation, which records BTF type ID describing root struct/union and an
 523  * accessor string which describes exact embedded field that was used to take
 524  * an address. See detailed description of this relocation format and
 525  * semantics in comments to struct bpf_offset_reloc in libbpf_internal.h.
 526  *
 527  * This relocation allows libbpf to adjust BPF instruction to use correct
 528  * actual field offset, based on target kernel BTF type that matches original
 529  * (local) BTF, used to record relocation.
 530  */
 531 #define BPF_CORE_READ(dst, src)                                         \
 532         bpf_probe_read((dst), sizeof(*(src)),                           \
 533                        __builtin_preserve_access_index(src))
 534 
 535 #endif
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root/tools/testing/selftests/bpf/bpf_helpers.h

INCLUDED FROM

DEFINITIONS
