mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-24 00:10:10 +07:00
2dc26d5a4f
Add BPF_CORE_READ macro used in tests to do bpf_core_read(), which automatically captures offset relocation. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
528 lines
21 KiB
C
528 lines
21 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __BPF_HELPERS_H
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#define __BPF_HELPERS_H
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/* helper macro to place programs, maps, license in
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* different sections in elf_bpf file. Section names
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* are interpreted by elf_bpf loader
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*/
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#define SEC(NAME) __attribute__((section(NAME), used))
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#define __uint(name, val) int (*name)[val]
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#define __type(name, val) val *name
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/* helper macro to print out debug messages */
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#define bpf_printk(fmt, ...) \
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({ \
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char ____fmt[] = fmt; \
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bpf_trace_printk(____fmt, sizeof(____fmt), \
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##__VA_ARGS__); \
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})
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/* helper functions called from eBPF programs written in C */
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static void *(*bpf_map_lookup_elem)(void *map, const void *key) =
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(void *) BPF_FUNC_map_lookup_elem;
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static int (*bpf_map_update_elem)(void *map, const void *key, const void *value,
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unsigned long long flags) =
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(void *) BPF_FUNC_map_update_elem;
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static int (*bpf_map_delete_elem)(void *map, const void *key) =
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(void *) BPF_FUNC_map_delete_elem;
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static int (*bpf_map_push_elem)(void *map, const void *value,
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unsigned long long flags) =
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(void *) BPF_FUNC_map_push_elem;
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static int (*bpf_map_pop_elem)(void *map, void *value) =
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(void *) BPF_FUNC_map_pop_elem;
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static int (*bpf_map_peek_elem)(void *map, void *value) =
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(void *) BPF_FUNC_map_peek_elem;
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static int (*bpf_probe_read)(void *dst, int size, const void *unsafe_ptr) =
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(void *) BPF_FUNC_probe_read;
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static unsigned long long (*bpf_ktime_get_ns)(void) =
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(void *) BPF_FUNC_ktime_get_ns;
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static int (*bpf_trace_printk)(const char *fmt, int fmt_size, ...) =
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(void *) BPF_FUNC_trace_printk;
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static void (*bpf_tail_call)(void *ctx, void *map, int index) =
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(void *) BPF_FUNC_tail_call;
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static unsigned long long (*bpf_get_smp_processor_id)(void) =
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(void *) BPF_FUNC_get_smp_processor_id;
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static unsigned long long (*bpf_get_current_pid_tgid)(void) =
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(void *) BPF_FUNC_get_current_pid_tgid;
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static unsigned long long (*bpf_get_current_uid_gid)(void) =
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(void *) BPF_FUNC_get_current_uid_gid;
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static int (*bpf_get_current_comm)(void *buf, int buf_size) =
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(void *) BPF_FUNC_get_current_comm;
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static unsigned long long (*bpf_perf_event_read)(void *map,
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unsigned long long flags) =
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(void *) BPF_FUNC_perf_event_read;
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static int (*bpf_clone_redirect)(void *ctx, int ifindex, int flags) =
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(void *) BPF_FUNC_clone_redirect;
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static int (*bpf_redirect)(int ifindex, int flags) =
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(void *) BPF_FUNC_redirect;
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static int (*bpf_redirect_map)(void *map, int key, int flags) =
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(void *) BPF_FUNC_redirect_map;
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static int (*bpf_perf_event_output)(void *ctx, void *map,
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unsigned long long flags, void *data,
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int size) =
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(void *) BPF_FUNC_perf_event_output;
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static int (*bpf_get_stackid)(void *ctx, void *map, int flags) =
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(void *) BPF_FUNC_get_stackid;
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static int (*bpf_probe_write_user)(void *dst, const void *src, int size) =
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(void *) BPF_FUNC_probe_write_user;
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static int (*bpf_current_task_under_cgroup)(void *map, int index) =
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(void *) BPF_FUNC_current_task_under_cgroup;
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static int (*bpf_skb_get_tunnel_key)(void *ctx, void *key, int size, int flags) =
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(void *) BPF_FUNC_skb_get_tunnel_key;
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static int (*bpf_skb_set_tunnel_key)(void *ctx, void *key, int size, int flags) =
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(void *) BPF_FUNC_skb_set_tunnel_key;
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static int (*bpf_skb_get_tunnel_opt)(void *ctx, void *md, int size) =
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(void *) BPF_FUNC_skb_get_tunnel_opt;
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static int (*bpf_skb_set_tunnel_opt)(void *ctx, void *md, int size) =
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(void *) BPF_FUNC_skb_set_tunnel_opt;
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static unsigned long long (*bpf_get_prandom_u32)(void) =
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(void *) BPF_FUNC_get_prandom_u32;
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static int (*bpf_xdp_adjust_head)(void *ctx, int offset) =
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(void *) BPF_FUNC_xdp_adjust_head;
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static int (*bpf_xdp_adjust_meta)(void *ctx, int offset) =
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(void *) BPF_FUNC_xdp_adjust_meta;
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static int (*bpf_get_socket_cookie)(void *ctx) =
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(void *) BPF_FUNC_get_socket_cookie;
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static int (*bpf_setsockopt)(void *ctx, int level, int optname, void *optval,
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int optlen) =
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(void *) BPF_FUNC_setsockopt;
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static int (*bpf_getsockopt)(void *ctx, int level, int optname, void *optval,
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int optlen) =
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(void *) BPF_FUNC_getsockopt;
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static int (*bpf_sock_ops_cb_flags_set)(void *ctx, int flags) =
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(void *) BPF_FUNC_sock_ops_cb_flags_set;
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static int (*bpf_sk_redirect_map)(void *ctx, void *map, int key, int flags) =
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(void *) BPF_FUNC_sk_redirect_map;
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static int (*bpf_sk_redirect_hash)(void *ctx, void *map, void *key, int flags) =
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(void *) BPF_FUNC_sk_redirect_hash;
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static int (*bpf_sock_map_update)(void *map, void *key, void *value,
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unsigned long long flags) =
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(void *) BPF_FUNC_sock_map_update;
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static int (*bpf_sock_hash_update)(void *map, void *key, void *value,
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unsigned long long flags) =
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(void *) BPF_FUNC_sock_hash_update;
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static int (*bpf_perf_event_read_value)(void *map, unsigned long long flags,
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void *buf, unsigned int buf_size) =
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(void *) BPF_FUNC_perf_event_read_value;
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static int (*bpf_perf_prog_read_value)(void *ctx, void *buf,
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unsigned int buf_size) =
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(void *) BPF_FUNC_perf_prog_read_value;
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static int (*bpf_override_return)(void *ctx, unsigned long rc) =
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(void *) BPF_FUNC_override_return;
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static int (*bpf_msg_redirect_map)(void *ctx, void *map, int key, int flags) =
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(void *) BPF_FUNC_msg_redirect_map;
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static int (*bpf_msg_redirect_hash)(void *ctx,
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void *map, void *key, int flags) =
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(void *) BPF_FUNC_msg_redirect_hash;
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static int (*bpf_msg_apply_bytes)(void *ctx, int len) =
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(void *) BPF_FUNC_msg_apply_bytes;
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static int (*bpf_msg_cork_bytes)(void *ctx, int len) =
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(void *) BPF_FUNC_msg_cork_bytes;
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static int (*bpf_msg_pull_data)(void *ctx, int start, int end, int flags) =
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(void *) BPF_FUNC_msg_pull_data;
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static int (*bpf_msg_push_data)(void *ctx, int start, int end, int flags) =
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(void *) BPF_FUNC_msg_push_data;
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static int (*bpf_msg_pop_data)(void *ctx, int start, int cut, int flags) =
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(void *) BPF_FUNC_msg_pop_data;
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static int (*bpf_bind)(void *ctx, void *addr, int addr_len) =
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(void *) BPF_FUNC_bind;
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static int (*bpf_xdp_adjust_tail)(void *ctx, int offset) =
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(void *) BPF_FUNC_xdp_adjust_tail;
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static int (*bpf_skb_get_xfrm_state)(void *ctx, int index, void *state,
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int size, int flags) =
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(void *) BPF_FUNC_skb_get_xfrm_state;
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static int (*bpf_sk_select_reuseport)(void *ctx, void *map, void *key, __u32 flags) =
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(void *) BPF_FUNC_sk_select_reuseport;
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static int (*bpf_get_stack)(void *ctx, void *buf, int size, int flags) =
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(void *) BPF_FUNC_get_stack;
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static int (*bpf_fib_lookup)(void *ctx, struct bpf_fib_lookup *params,
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int plen, __u32 flags) =
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(void *) BPF_FUNC_fib_lookup;
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static int (*bpf_lwt_push_encap)(void *ctx, unsigned int type, void *hdr,
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unsigned int len) =
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(void *) BPF_FUNC_lwt_push_encap;
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static int (*bpf_lwt_seg6_store_bytes)(void *ctx, unsigned int offset,
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void *from, unsigned int len) =
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(void *) BPF_FUNC_lwt_seg6_store_bytes;
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static int (*bpf_lwt_seg6_action)(void *ctx, unsigned int action, void *param,
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unsigned int param_len) =
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(void *) BPF_FUNC_lwt_seg6_action;
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static int (*bpf_lwt_seg6_adjust_srh)(void *ctx, unsigned int offset,
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unsigned int len) =
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(void *) BPF_FUNC_lwt_seg6_adjust_srh;
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static int (*bpf_rc_repeat)(void *ctx) =
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(void *) BPF_FUNC_rc_repeat;
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static int (*bpf_rc_keydown)(void *ctx, unsigned int protocol,
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unsigned long long scancode, unsigned int toggle) =
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(void *) BPF_FUNC_rc_keydown;
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static unsigned long long (*bpf_get_current_cgroup_id)(void) =
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(void *) BPF_FUNC_get_current_cgroup_id;
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static void *(*bpf_get_local_storage)(void *map, unsigned long long flags) =
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(void *) BPF_FUNC_get_local_storage;
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static unsigned long long (*bpf_skb_cgroup_id)(void *ctx) =
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(void *) BPF_FUNC_skb_cgroup_id;
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static unsigned long long (*bpf_skb_ancestor_cgroup_id)(void *ctx, int level) =
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(void *) BPF_FUNC_skb_ancestor_cgroup_id;
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static struct bpf_sock *(*bpf_sk_lookup_tcp)(void *ctx,
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struct bpf_sock_tuple *tuple,
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int size, unsigned long long netns_id,
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unsigned long long flags) =
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(void *) BPF_FUNC_sk_lookup_tcp;
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static struct bpf_sock *(*bpf_skc_lookup_tcp)(void *ctx,
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struct bpf_sock_tuple *tuple,
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int size, unsigned long long netns_id,
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unsigned long long flags) =
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(void *) BPF_FUNC_skc_lookup_tcp;
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static struct bpf_sock *(*bpf_sk_lookup_udp)(void *ctx,
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struct bpf_sock_tuple *tuple,
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int size, unsigned long long netns_id,
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unsigned long long flags) =
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(void *) BPF_FUNC_sk_lookup_udp;
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static int (*bpf_sk_release)(struct bpf_sock *sk) =
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(void *) BPF_FUNC_sk_release;
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static int (*bpf_skb_vlan_push)(void *ctx, __be16 vlan_proto, __u16 vlan_tci) =
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(void *) BPF_FUNC_skb_vlan_push;
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static int (*bpf_skb_vlan_pop)(void *ctx) =
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(void *) BPF_FUNC_skb_vlan_pop;
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static int (*bpf_rc_pointer_rel)(void *ctx, int rel_x, int rel_y) =
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(void *) BPF_FUNC_rc_pointer_rel;
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static void (*bpf_spin_lock)(struct bpf_spin_lock *lock) =
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(void *) BPF_FUNC_spin_lock;
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static void (*bpf_spin_unlock)(struct bpf_spin_lock *lock) =
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(void *) BPF_FUNC_spin_unlock;
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static struct bpf_sock *(*bpf_sk_fullsock)(struct bpf_sock *sk) =
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(void *) BPF_FUNC_sk_fullsock;
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static struct bpf_tcp_sock *(*bpf_tcp_sock)(struct bpf_sock *sk) =
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(void *) BPF_FUNC_tcp_sock;
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static struct bpf_sock *(*bpf_get_listener_sock)(struct bpf_sock *sk) =
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(void *) BPF_FUNC_get_listener_sock;
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static int (*bpf_skb_ecn_set_ce)(void *ctx) =
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(void *) BPF_FUNC_skb_ecn_set_ce;
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static int (*bpf_tcp_check_syncookie)(struct bpf_sock *sk,
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void *ip, int ip_len, void *tcp, int tcp_len) =
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(void *) BPF_FUNC_tcp_check_syncookie;
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static int (*bpf_sysctl_get_name)(void *ctx, char *buf,
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unsigned long long buf_len,
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unsigned long long flags) =
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(void *) BPF_FUNC_sysctl_get_name;
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static int (*bpf_sysctl_get_current_value)(void *ctx, char *buf,
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unsigned long long buf_len) =
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(void *) BPF_FUNC_sysctl_get_current_value;
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static int (*bpf_sysctl_get_new_value)(void *ctx, char *buf,
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unsigned long long buf_len) =
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(void *) BPF_FUNC_sysctl_get_new_value;
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static int (*bpf_sysctl_set_new_value)(void *ctx, const char *buf,
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unsigned long long buf_len) =
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(void *) BPF_FUNC_sysctl_set_new_value;
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static int (*bpf_strtol)(const char *buf, unsigned long long buf_len,
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unsigned long long flags, long *res) =
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(void *) BPF_FUNC_strtol;
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static int (*bpf_strtoul)(const char *buf, unsigned long long buf_len,
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unsigned long long flags, unsigned long *res) =
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(void *) BPF_FUNC_strtoul;
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static void *(*bpf_sk_storage_get)(void *map, struct bpf_sock *sk,
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void *value, __u64 flags) =
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(void *) BPF_FUNC_sk_storage_get;
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static int (*bpf_sk_storage_delete)(void *map, struct bpf_sock *sk) =
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(void *)BPF_FUNC_sk_storage_delete;
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static int (*bpf_send_signal)(unsigned sig) = (void *)BPF_FUNC_send_signal;
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static long long (*bpf_tcp_gen_syncookie)(struct bpf_sock *sk, void *ip,
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int ip_len, void *tcp, int tcp_len) =
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(void *) BPF_FUNC_tcp_gen_syncookie;
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/* llvm builtin functions that eBPF C program may use to
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* emit BPF_LD_ABS and BPF_LD_IND instructions
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*/
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struct sk_buff;
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unsigned long long load_byte(void *skb,
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unsigned long long off) asm("llvm.bpf.load.byte");
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unsigned long long load_half(void *skb,
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unsigned long long off) asm("llvm.bpf.load.half");
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unsigned long long load_word(void *skb,
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unsigned long long off) asm("llvm.bpf.load.word");
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/* a helper structure used by eBPF C program
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* to describe map attributes to elf_bpf loader
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*/
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struct bpf_map_def {
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unsigned int type;
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unsigned int key_size;
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unsigned int value_size;
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unsigned int max_entries;
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unsigned int map_flags;
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unsigned int inner_map_idx;
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unsigned int numa_node;
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};
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#define BPF_ANNOTATE_KV_PAIR(name, type_key, type_val) \
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struct ____btf_map_##name { \
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type_key key; \
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type_val value; \
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}; \
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struct ____btf_map_##name \
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__attribute__ ((section(".maps." #name), used)) \
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____btf_map_##name = { }
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static int (*bpf_skb_load_bytes)(void *ctx, int off, void *to, int len) =
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(void *) BPF_FUNC_skb_load_bytes;
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static int (*bpf_skb_load_bytes_relative)(void *ctx, int off, void *to, int len, __u32 start_header) =
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(void *) BPF_FUNC_skb_load_bytes_relative;
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static int (*bpf_skb_store_bytes)(void *ctx, int off, void *from, int len, int flags) =
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(void *) BPF_FUNC_skb_store_bytes;
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static int (*bpf_l3_csum_replace)(void *ctx, int off, int from, int to, int flags) =
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(void *) BPF_FUNC_l3_csum_replace;
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static int (*bpf_l4_csum_replace)(void *ctx, int off, int from, int to, int flags) =
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(void *) BPF_FUNC_l4_csum_replace;
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static int (*bpf_csum_diff)(void *from, int from_size, void *to, int to_size, int seed) =
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(void *) BPF_FUNC_csum_diff;
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static int (*bpf_skb_under_cgroup)(void *ctx, void *map, int index) =
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(void *) BPF_FUNC_skb_under_cgroup;
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static int (*bpf_skb_change_head)(void *, int len, int flags) =
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(void *) BPF_FUNC_skb_change_head;
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static int (*bpf_skb_pull_data)(void *, int len) =
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(void *) BPF_FUNC_skb_pull_data;
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static unsigned int (*bpf_get_cgroup_classid)(void *ctx) =
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(void *) BPF_FUNC_get_cgroup_classid;
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static unsigned int (*bpf_get_route_realm)(void *ctx) =
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(void *) BPF_FUNC_get_route_realm;
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static int (*bpf_skb_change_proto)(void *ctx, __be16 proto, __u64 flags) =
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(void *) BPF_FUNC_skb_change_proto;
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static int (*bpf_skb_change_type)(void *ctx, __u32 type) =
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(void *) BPF_FUNC_skb_change_type;
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static unsigned int (*bpf_get_hash_recalc)(void *ctx) =
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(void *) BPF_FUNC_get_hash_recalc;
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static unsigned long long (*bpf_get_current_task)(void) =
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(void *) BPF_FUNC_get_current_task;
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static int (*bpf_skb_change_tail)(void *ctx, __u32 len, __u64 flags) =
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(void *) BPF_FUNC_skb_change_tail;
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static long long (*bpf_csum_update)(void *ctx, __u32 csum) =
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(void *) BPF_FUNC_csum_update;
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static void (*bpf_set_hash_invalid)(void *ctx) =
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(void *) BPF_FUNC_set_hash_invalid;
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static int (*bpf_get_numa_node_id)(void) =
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(void *) BPF_FUNC_get_numa_node_id;
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static int (*bpf_probe_read_str)(void *ctx, __u32 size,
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const void *unsafe_ptr) =
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(void *) BPF_FUNC_probe_read_str;
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static unsigned int (*bpf_get_socket_uid)(void *ctx) =
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(void *) BPF_FUNC_get_socket_uid;
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static unsigned int (*bpf_set_hash)(void *ctx, __u32 hash) =
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(void *) BPF_FUNC_set_hash;
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static int (*bpf_skb_adjust_room)(void *ctx, __s32 len_diff, __u32 mode,
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unsigned long long flags) =
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(void *) BPF_FUNC_skb_adjust_room;
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/* Scan the ARCH passed in from ARCH env variable (see Makefile) */
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#if defined(__TARGET_ARCH_x86)
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#define bpf_target_x86
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#define bpf_target_defined
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#elif defined(__TARGET_ARCH_s390)
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#define bpf_target_s390
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#define bpf_target_defined
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#elif defined(__TARGET_ARCH_arm)
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#define bpf_target_arm
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#define bpf_target_defined
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#elif defined(__TARGET_ARCH_arm64)
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#define bpf_target_arm64
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#define bpf_target_defined
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#elif defined(__TARGET_ARCH_mips)
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#define bpf_target_mips
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#define bpf_target_defined
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#elif defined(__TARGET_ARCH_powerpc)
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#define bpf_target_powerpc
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#define bpf_target_defined
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#elif defined(__TARGET_ARCH_sparc)
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#define bpf_target_sparc
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#define bpf_target_defined
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#else
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#undef bpf_target_defined
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#endif
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/* Fall back to what the compiler says */
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#ifndef bpf_target_defined
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#if defined(__x86_64__)
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#define bpf_target_x86
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#elif defined(__s390__)
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#define bpf_target_s390
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#elif defined(__arm__)
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#define bpf_target_arm
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#elif defined(__aarch64__)
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#define bpf_target_arm64
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#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
|