Commit | Line | Data |
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249b812d AS |
1 | #ifndef __BPF_HELPERS_H |
2 | #define __BPF_HELPERS_H | |
3 | ||
4 | /* helper macro to place programs, maps, license in | |
5 | * different sections in elf_bpf file. Section names | |
6 | * are interpreted by elf_bpf loader | |
7 | */ | |
8 | #define SEC(NAME) __attribute__((section(NAME), used)) | |
9 | ||
10 | /* helper functions called from eBPF programs written in C */ | |
11 | static void *(*bpf_map_lookup_elem)(void *map, void *key) = | |
12 | (void *) BPF_FUNC_map_lookup_elem; | |
13 | static int (*bpf_map_update_elem)(void *map, void *key, void *value, | |
14 | unsigned long long flags) = | |
15 | (void *) BPF_FUNC_map_update_elem; | |
16 | static int (*bpf_map_delete_elem)(void *map, void *key) = | |
17 | (void *) BPF_FUNC_map_delete_elem; | |
b896c4f9 AS |
18 | static int (*bpf_probe_read)(void *dst, int size, void *unsafe_ptr) = |
19 | (void *) BPF_FUNC_probe_read; | |
20 | static unsigned long long (*bpf_ktime_get_ns)(void) = | |
21 | (void *) BPF_FUNC_ktime_get_ns; | |
22 | static int (*bpf_trace_printk)(const char *fmt, int fmt_size, ...) = | |
23 | (void *) BPF_FUNC_trace_printk; | |
5bacd780 AS |
24 | static void (*bpf_tail_call)(void *ctx, void *map, int index) = |
25 | (void *) BPF_FUNC_tail_call; | |
530b2c86 AS |
26 | static unsigned long long (*bpf_get_smp_processor_id)(void) = |
27 | (void *) BPF_FUNC_get_smp_processor_id; | |
ffeedafb AS |
28 | static unsigned long long (*bpf_get_current_pid_tgid)(void) = |
29 | (void *) BPF_FUNC_get_current_pid_tgid; | |
30 | static unsigned long long (*bpf_get_current_uid_gid)(void) = | |
31 | (void *) BPF_FUNC_get_current_uid_gid; | |
32 | static int (*bpf_get_current_comm)(void *buf, int buf_size) = | |
33 | (void *) BPF_FUNC_get_current_comm; | |
47efb302 KX |
34 | static int (*bpf_perf_event_read)(void *map, int index) = |
35 | (void *) BPF_FUNC_perf_event_read; | |
27b29f63 AS |
36 | static int (*bpf_clone_redirect)(void *ctx, int ifindex, int flags) = |
37 | (void *) BPF_FUNC_clone_redirect; | |
38 | static int (*bpf_redirect)(int ifindex, int flags) = | |
39 | (void *) BPF_FUNC_redirect; | |
05b8ad25 AB |
40 | static int (*bpf_perf_event_output)(void *ctx, void *map, |
41 | unsigned long long flags, void *data, | |
42 | int size) = | |
39111695 | 43 | (void *) BPF_FUNC_perf_event_output; |
a6ffe7b9 AS |
44 | static int (*bpf_get_stackid)(void *ctx, void *map, int flags) = |
45 | (void *) BPF_FUNC_get_stackid; | |
96ae5227 SD |
46 | static int (*bpf_probe_write_user)(void *dst, void *src, int size) = |
47 | (void *) BPF_FUNC_probe_write_user; | |
9e6e60ec SD |
48 | static int (*bpf_current_task_under_cgroup)(void *map, int index) = |
49 | (void *) BPF_FUNC_current_task_under_cgroup; | |
6afb1e28 WT |
50 | static int (*bpf_skb_get_tunnel_key)(void *ctx, void *key, int size, int flags) = |
51 | (void *) BPF_FUNC_skb_get_tunnel_key; | |
52 | static int (*bpf_skb_set_tunnel_key)(void *ctx, void *key, int size, int flags) = | |
53 | (void *) BPF_FUNC_skb_set_tunnel_key; | |
54 | static int (*bpf_skb_get_tunnel_opt)(void *ctx, void *md, int size) = | |
55 | (void *) BPF_FUNC_skb_get_tunnel_opt; | |
56 | static int (*bpf_skb_set_tunnel_opt)(void *ctx, void *md, int size) = | |
57 | (void *) BPF_FUNC_skb_set_tunnel_opt; | |
1c47910e AS |
58 | static unsigned long long (*bpf_get_prandom_u32)(void) = |
59 | (void *) BPF_FUNC_get_prandom_u32; | |
12d8bb64 MKL |
60 | static int (*bpf_xdp_adjust_head)(void *ctx, int offset) = |
61 | (void *) BPF_FUNC_xdp_adjust_head; | |
249b812d AS |
62 | |
63 | /* llvm builtin functions that eBPF C program may use to | |
64 | * emit BPF_LD_ABS and BPF_LD_IND instructions | |
65 | */ | |
66 | struct sk_buff; | |
67 | unsigned long long load_byte(void *skb, | |
68 | unsigned long long off) asm("llvm.bpf.load.byte"); | |
69 | unsigned long long load_half(void *skb, | |
70 | unsigned long long off) asm("llvm.bpf.load.half"); | |
71 | unsigned long long load_word(void *skb, | |
72 | unsigned long long off) asm("llvm.bpf.load.word"); | |
73 | ||
74 | /* a helper structure used by eBPF C program | |
75 | * to describe map attributes to elf_bpf loader | |
76 | */ | |
77 | struct bpf_map_def { | |
78 | unsigned int type; | |
79 | unsigned int key_size; | |
80 | unsigned int value_size; | |
81 | unsigned int max_entries; | |
89b97607 | 82 | unsigned int map_flags; |
fb30d4b7 | 83 | unsigned int inner_map_idx; |
249b812d AS |
84 | }; |
85 | ||
f74599f7 TG |
86 | static int (*bpf_skb_load_bytes)(void *ctx, int off, void *to, int len) = |
87 | (void *) BPF_FUNC_skb_load_bytes; | |
91bc4822 AS |
88 | static int (*bpf_skb_store_bytes)(void *ctx, int off, void *from, int len, int flags) = |
89 | (void *) BPF_FUNC_skb_store_bytes; | |
90 | static int (*bpf_l3_csum_replace)(void *ctx, int off, int from, int to, int flags) = | |
91 | (void *) BPF_FUNC_l3_csum_replace; | |
92 | static int (*bpf_l4_csum_replace)(void *ctx, int off, int from, int to, int flags) = | |
93 | (void *) BPF_FUNC_l4_csum_replace; | |
747ea55e DB |
94 | static int (*bpf_skb_under_cgroup)(void *ctx, void *map, int index) = |
95 | (void *) BPF_FUNC_skb_under_cgroup; | |
f74599f7 TG |
96 | static int (*bpf_skb_change_head)(void *, int len, int flags) = |
97 | (void *) BPF_FUNC_skb_change_head; | |
91bc4822 | 98 | |
d912557b MH |
99 | #if defined(__x86_64__) |
100 | ||
101 | #define PT_REGS_PARM1(x) ((x)->di) | |
102 | #define PT_REGS_PARM2(x) ((x)->si) | |
103 | #define PT_REGS_PARM3(x) ((x)->dx) | |
104 | #define PT_REGS_PARM4(x) ((x)->cx) | |
105 | #define PT_REGS_PARM5(x) ((x)->r8) | |
106 | #define PT_REGS_RET(x) ((x)->sp) | |
107 | #define PT_REGS_FP(x) ((x)->bp) | |
108 | #define PT_REGS_RC(x) ((x)->ax) | |
109 | #define PT_REGS_SP(x) ((x)->sp) | |
138d6153 | 110 | #define PT_REGS_IP(x) ((x)->ip) |
d912557b MH |
111 | |
112 | #elif defined(__s390x__) | |
113 | ||
114 | #define PT_REGS_PARM1(x) ((x)->gprs[2]) | |
115 | #define PT_REGS_PARM2(x) ((x)->gprs[3]) | |
116 | #define PT_REGS_PARM3(x) ((x)->gprs[4]) | |
117 | #define PT_REGS_PARM4(x) ((x)->gprs[5]) | |
118 | #define PT_REGS_PARM5(x) ((x)->gprs[6]) | |
119 | #define PT_REGS_RET(x) ((x)->gprs[14]) | |
120 | #define PT_REGS_FP(x) ((x)->gprs[11]) /* Works only with CONFIG_FRAME_POINTER */ | |
121 | #define PT_REGS_RC(x) ((x)->gprs[2]) | |
122 | #define PT_REGS_SP(x) ((x)->gprs[15]) | |
2dbb4c05 | 123 | #define PT_REGS_IP(x) ((x)->psw.addr) |
d912557b | 124 | |
85ff8a43 YS |
125 | #elif defined(__aarch64__) |
126 | ||
127 | #define PT_REGS_PARM1(x) ((x)->regs[0]) | |
128 | #define PT_REGS_PARM2(x) ((x)->regs[1]) | |
129 | #define PT_REGS_PARM3(x) ((x)->regs[2]) | |
130 | #define PT_REGS_PARM4(x) ((x)->regs[3]) | |
131 | #define PT_REGS_PARM5(x) ((x)->regs[4]) | |
132 | #define PT_REGS_RET(x) ((x)->regs[30]) | |
133 | #define PT_REGS_FP(x) ((x)->regs[29]) /* Works only with CONFIG_FRAME_POINTER */ | |
134 | #define PT_REGS_RC(x) ((x)->regs[0]) | |
135 | #define PT_REGS_SP(x) ((x)->sp) | |
138d6153 NR |
136 | #define PT_REGS_IP(x) ((x)->pc) |
137 | ||
138 | #elif defined(__powerpc__) | |
139 | ||
140 | #define PT_REGS_PARM1(x) ((x)->gpr[3]) | |
141 | #define PT_REGS_PARM2(x) ((x)->gpr[4]) | |
142 | #define PT_REGS_PARM3(x) ((x)->gpr[5]) | |
143 | #define PT_REGS_PARM4(x) ((x)->gpr[6]) | |
144 | #define PT_REGS_PARM5(x) ((x)->gpr[7]) | |
145 | #define PT_REGS_RC(x) ((x)->gpr[3]) | |
146 | #define PT_REGS_SP(x) ((x)->sp) | |
147 | #define PT_REGS_IP(x) ((x)->nip) | |
85ff8a43 | 148 | |
d912557b | 149 | #endif |
138d6153 NR |
150 | |
151 | #ifdef __powerpc__ | |
152 | #define BPF_KPROBE_READ_RET_IP(ip, ctx) ({ (ip) = (ctx)->link; }) | |
153 | #define BPF_KRETPROBE_READ_RET_IP BPF_KPROBE_READ_RET_IP | |
154 | #else | |
155 | #define BPF_KPROBE_READ_RET_IP(ip, ctx) ({ \ | |
156 | bpf_probe_read(&(ip), sizeof(ip), (void *)PT_REGS_RET(ctx)); }) | |
157 | #define BPF_KRETPROBE_READ_RET_IP(ip, ctx) ({ \ | |
158 | bpf_probe_read(&(ip), sizeof(ip), \ | |
159 | (void *)(PT_REGS_FP(ctx) + sizeof(ip))); }) | |
160 | #endif | |
161 | ||
249b812d | 162 | #endif |