249b812d80
simple .o parser and loader using BPF syscall. .o is a standard ELF generated by LLVM backend It parses elf file compiled by llvm .c->.o - parses 'maps' section and creates maps via BPF syscall - parses 'license' section and passes it to syscall - parses elf relocations for BPF maps and adjusts BPF_LD_IMM64 insns by storing map_fd into insn->imm and marking such insns as BPF_PSEUDO_MAP_FD - loads eBPF programs via BPF syscall One ELF file can contain multiple BPF programs. int load_bpf_file(char *path); populates prog_fd[] and map_fd[] with FDs received from bpf syscall bpf_helpers.h - helper functions available to eBPF programs written in C Signed-off-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>
24 lines
694 B
C
24 lines
694 B
C
#ifndef __BPF_LOAD_H
|
|
#define __BPF_LOAD_H
|
|
|
|
#define MAX_MAPS 32
|
|
#define MAX_PROGS 32
|
|
|
|
extern int map_fd[MAX_MAPS];
|
|
extern int prog_fd[MAX_PROGS];
|
|
|
|
/* parses elf file compiled by llvm .c->.o
|
|
* . parses 'maps' section and creates maps via BPF syscall
|
|
* . parses 'license' section and passes it to syscall
|
|
* . parses elf relocations for BPF maps and adjusts BPF_LD_IMM64 insns by
|
|
* storing map_fd into insn->imm and marking such insns as BPF_PSEUDO_MAP_FD
|
|
* . loads eBPF programs via BPF syscall
|
|
*
|
|
* One ELF file can contain multiple BPF programs which will be loaded
|
|
* and their FDs stored stored in prog_fd array
|
|
*
|
|
* returns zero on success
|
|
*/
|
|
int load_bpf_file(char *path);
|
|
|
|
#endif
|