samples/bpf/bpf_load.h

   1 #ifndef __BPF_LOAD_H
   2 #define __BPF_LOAD_H
   3
   4 #define MAX_MAPS 32
   5 #define MAX_PROGS 32
   6
   7 extern int map_fd[MAX_MAPS];
   8 extern int prog_fd[MAX_PROGS];
   9 extern int event_fd[MAX_PROGS];
  10
  11 /* parses elf file compiled by llvm .c->.o
  12  * . parses 'maps' section and creates maps via BPF syscall
  13  * . parses 'license' section and passes it to syscall
  14  * . parses elf relocations for BPF maps and adjusts BPF_LD_IMM64 insns by
  15  *   storing map_fd into insn->imm and marking such insns as BPF_PSEUDO_MAP_FD
  16  * . loads eBPF programs via BPF syscall
  17  *
  18  * One ELF file can contain multiple BPF programs which will be loaded
  19  * and their FDs stored stored in prog_fd array
  20  *
  21  * returns zero on success
  22  */
  23 int load_bpf_file(char *path);
  24
  25 void read_trace_pipe(void);
  26
  27 #endif