| /* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */ |
| #ifndef __BPF_HELPERS__ |
| #define __BPF_HELPERS__ |
| |
| #define __uint(name, val) int (*name)[val] |
| #define __type(name, val) val *name |
| |
| /* helper macro to print out debug messages */ |
| #define bpf_printk(fmt, ...) \ |
| ({ \ |
| char ____fmt[] = fmt; \ |
| bpf_trace_printk(____fmt, sizeof(____fmt), \ |
| ##__VA_ARGS__); \ |
| }) |
| |
| #ifdef __clang__ |
| |
| /* 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, const void *key) = |
| (void *) BPF_FUNC_map_lookup_elem; |
| static int (*bpf_map_update_elem)(void *map, const void *key, const void *value, |
| unsigned long long flags) = |
| (void *) BPF_FUNC_map_update_elem; |
| static int (*bpf_map_delete_elem)(void *map, const void *key) = |
| (void *) BPF_FUNC_map_delete_elem; |
| static int (*bpf_map_push_elem)(void *map, const 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, const 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, const 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_skc_lookup_tcp)(void *ctx, |
| struct bpf_sock_tuple *tuple, |
| int size, unsigned long long netns_id, |
| unsigned long long flags) = |
| (void *) BPF_FUNC_skc_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; |
| static int (*bpf_tcp_check_syncookie)(struct bpf_sock *sk, |
| void *ip, int ip_len, void *tcp, int tcp_len) = |
| (void *) BPF_FUNC_tcp_check_syncookie; |
| static int (*bpf_sysctl_get_name)(void *ctx, char *buf, |
| unsigned long long buf_len, |
| unsigned long long flags) = |
| (void *) BPF_FUNC_sysctl_get_name; |
| static int (*bpf_sysctl_get_current_value)(void *ctx, char *buf, |
| unsigned long long buf_len) = |
| (void *) BPF_FUNC_sysctl_get_current_value; |
| static int (*bpf_sysctl_get_new_value)(void *ctx, char *buf, |
| unsigned long long buf_len) = |
| (void *) BPF_FUNC_sysctl_get_new_value; |
| static int (*bpf_sysctl_set_new_value)(void *ctx, const char *buf, |
| unsigned long long buf_len) = |
| (void *) BPF_FUNC_sysctl_set_new_value; |
| static int (*bpf_strtol)(const char *buf, unsigned long long buf_len, |
| unsigned long long flags, long *res) = |
| (void *) BPF_FUNC_strtol; |
| static int (*bpf_strtoul)(const char *buf, unsigned long long buf_len, |
| unsigned long long flags, unsigned long *res) = |
| (void *) BPF_FUNC_strtoul; |
| static void *(*bpf_sk_storage_get)(void *map, struct bpf_sock *sk, |
| void *value, __u64 flags) = |
| (void *) BPF_FUNC_sk_storage_get; |
| static int (*bpf_sk_storage_delete)(void *map, struct bpf_sock *sk) = |
| (void *)BPF_FUNC_sk_storage_delete; |
| static int (*bpf_send_signal)(unsigned sig) = (void *)BPF_FUNC_send_signal; |
| static long long (*bpf_tcp_gen_syncookie)(struct bpf_sock *sk, void *ip, |
| int ip_len, void *tcp, int tcp_len) = |
| (void *) BPF_FUNC_tcp_gen_syncookie; |
| |
| /* 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; |
| }; |
| |
| #else |
| |
| #include <bpf-helpers.h> |
| |
| #endif |
| |
| #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) = |
| (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_s390) |
| #define bpf_target_s390 |
| #define bpf_target_defined |
| #elif defined(__TARGET_ARCH_arm) |
| #define bpf_target_arm |
| #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(__s390__) |
| #define bpf_target_s390 |
| #elif defined(__arm__) |
| #define bpf_target_arm |
| #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) |
| |
| #ifdef __KERNEL__ |
| #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) |
| #else |
| #ifdef __i386__ |
| /* i386 kernel is built with -mregparm=3 */ |
| #define PT_REGS_PARM1(x) ((x)->eax) |
| #define PT_REGS_PARM2(x) ((x)->edx) |
| #define PT_REGS_PARM3(x) ((x)->ecx) |
| #define PT_REGS_PARM4(x) 0 |
| #define PT_REGS_PARM5(x) 0 |
| #define PT_REGS_RET(x) ((x)->esp) |
| #define PT_REGS_FP(x) ((x)->ebp) |
| #define PT_REGS_RC(x) ((x)->eax) |
| #define PT_REGS_SP(x) ((x)->esp) |
| #define PT_REGS_IP(x) ((x)->eip) |
| #else |
| #define PT_REGS_PARM1(x) ((x)->rdi) |
| #define PT_REGS_PARM2(x) ((x)->rsi) |
| #define PT_REGS_PARM3(x) ((x)->rdx) |
| #define PT_REGS_PARM4(x) ((x)->rcx) |
| #define PT_REGS_PARM5(x) ((x)->r8) |
| #define PT_REGS_RET(x) ((x)->rsp) |
| #define PT_REGS_FP(x) ((x)->rbp) |
| #define PT_REGS_RC(x) ((x)->rax) |
| #define PT_REGS_SP(x) ((x)->rsp) |
| #define PT_REGS_IP(x) ((x)->rip) |
| #endif |
| #endif |
| |
| #elif defined(bpf_target_s390) |
| |
| /* s390 provides user_pt_regs instead of struct pt_regs to userspace */ |
| struct pt_regs; |
| #define PT_REGS_S390 const volatile user_pt_regs |
| #define PT_REGS_PARM1(x) (((PT_REGS_S390 *)(x))->gprs[2]) |
| #define PT_REGS_PARM2(x) (((PT_REGS_S390 *)(x))->gprs[3]) |
| #define PT_REGS_PARM3(x) (((PT_REGS_S390 *)(x))->gprs[4]) |
| #define PT_REGS_PARM4(x) (((PT_REGS_S390 *)(x))->gprs[5]) |
| #define PT_REGS_PARM5(x) (((PT_REGS_S390 *)(x))->gprs[6]) |
| #define PT_REGS_RET(x) (((PT_REGS_S390 *)(x))->gprs[14]) |
| /* Works only with CONFIG_FRAME_POINTER */ |
| #define PT_REGS_FP(x) (((PT_REGS_S390 *)(x))->gprs[11]) |
| #define PT_REGS_RC(x) (((PT_REGS_S390 *)(x))->gprs[2]) |
| #define PT_REGS_SP(x) (((PT_REGS_S390 *)(x))->gprs[15]) |
| #define PT_REGS_IP(x) (((PT_REGS_S390 *)(x))->psw.addr) |
| |
| #elif defined(bpf_target_arm) |
| |
| #define PT_REGS_PARM1(x) ((x)->uregs[0]) |
| #define PT_REGS_PARM2(x) ((x)->uregs[1]) |
| #define PT_REGS_PARM3(x) ((x)->uregs[2]) |
| #define PT_REGS_PARM4(x) ((x)->uregs[3]) |
| #define PT_REGS_PARM5(x) ((x)->uregs[4]) |
| #define PT_REGS_RET(x) ((x)->uregs[14]) |
| #define PT_REGS_FP(x) ((x)->uregs[11]) /* Works only with CONFIG_FRAME_POINTER */ |
| #define PT_REGS_RC(x) ((x)->uregs[0]) |
| #define PT_REGS_SP(x) ((x)->uregs[13]) |
| #define PT_REGS_IP(x) ((x)->uregs[12]) |
| |
| #elif defined(bpf_target_arm64) |
| |
| /* arm64 provides struct user_pt_regs instead of struct pt_regs to userspace */ |
| struct pt_regs; |
| #define PT_REGS_ARM64 const volatile struct user_pt_regs |
| #define PT_REGS_PARM1(x) (((PT_REGS_ARM64 *)(x))->regs[0]) |
| #define PT_REGS_PARM2(x) (((PT_REGS_ARM64 *)(x))->regs[1]) |
| #define PT_REGS_PARM3(x) (((PT_REGS_ARM64 *)(x))->regs[2]) |
| #define PT_REGS_PARM4(x) (((PT_REGS_ARM64 *)(x))->regs[3]) |
| #define PT_REGS_PARM5(x) (((PT_REGS_ARM64 *)(x))->regs[4]) |
| #define PT_REGS_RET(x) (((PT_REGS_ARM64 *)(x))->regs[30]) |
| /* Works only with CONFIG_FRAME_POINTER */ |
| #define PT_REGS_FP(x) (((PT_REGS_ARM64 *)(x))->regs[29]) |
| #define PT_REGS_RC(x) (((PT_REGS_ARM64 *)(x))->regs[0]) |
| #define PT_REGS_SP(x) (((PT_REGS_ARM64 *)(x))->sp) |
| #define PT_REGS_IP(x) (((PT_REGS_ARM64 *)(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 |
| |
| #if defined(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 defined(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 |
| |
| /* |
| * BPF_CORE_READ abstracts away bpf_probe_read() call and captures offset |
| * relocation for source address using __builtin_preserve_access_index() |
| * built-in, provided by Clang. |
| * |
| * __builtin_preserve_access_index() takes as an argument an expression of |
| * taking an address of a field within struct/union. It makes compiler emit |
| * a relocation, which records BTF type ID describing root struct/union and an |
| * accessor string which describes exact embedded field that was used to take |
| * an address. See detailed description of this relocation format and |
| * semantics in comments to struct bpf_offset_reloc in libbpf_internal.h. |
| * |
| * This relocation allows libbpf to adjust BPF instruction to use correct |
| * actual field offset, based on target kernel BTF type that matches original |
| * (local) BTF, used to record relocation. |
| */ |
| #define BPF_CORE_READ(dst, src) \ |
| bpf_probe_read((dst), sizeof(*(src)), \ |
| __builtin_preserve_access_index(src)) |
| |
| #endif |
