diff options
Diffstat (limited to 'tools/bpf/bpftool/prog.c')
| -rw-r--r-- | tools/bpf/bpftool/prog.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/tools/bpf/bpftool/prog.c b/tools/bpf/bpftool/prog.c index c176e1aa66fe..37b1daf19da6 100644 --- a/tools/bpf/bpftool/prog.c +++ b/tools/bpf/bpftool/prog.c @@ -47,6 +47,7 @@ #include <linux/err.h> #include <bpf.h> +#include <btf.h> #include <libbpf.h> #include "cfg.h" @@ -451,14 +452,19 @@ static int do_dump(int argc, char **argv) struct bpf_prog_info info = {}; unsigned int *func_lens = NULL; const char *disasm_opt = NULL; + unsigned int finfo_rec_size; unsigned int nr_func_ksyms; unsigned int nr_func_lens; struct dump_data dd = {}; __u32 len = sizeof(info); + struct btf *btf = NULL; + void *func_info = NULL; + unsigned int finfo_cnt; unsigned int buf_size; char *filepath = NULL; bool opcodes = false; bool visual = false; + char func_sig[1024]; unsigned char *buf; __u32 *member_len; __u64 *member_ptr; @@ -551,6 +557,17 @@ static int do_dump(int argc, char **argv) } } + finfo_cnt = info.func_info_cnt; + finfo_rec_size = info.func_info_rec_size; + if (finfo_cnt && finfo_rec_size) { + func_info = malloc(finfo_cnt * finfo_rec_size); + if (!func_info) { + p_err("mem alloc failed"); + close(fd); + goto err_free; + } + } + memset(&info, 0, sizeof(info)); *member_ptr = ptr_to_u64(buf); @@ -559,6 +576,9 @@ static int do_dump(int argc, char **argv) info.nr_jited_ksyms = nr_func_ksyms; info.jited_func_lens = ptr_to_u64(func_lens); info.nr_jited_func_lens = nr_func_lens; + info.func_info_cnt = finfo_cnt; + info.func_info_rec_size = finfo_rec_size; + info.func_info = ptr_to_u64(func_info); err = bpf_obj_get_info_by_fd(fd, &info, &len); close(fd); @@ -582,6 +602,18 @@ static int do_dump(int argc, char **argv) goto err_free; } + if (info.func_info_cnt != finfo_cnt) { + p_err("incorrect func_info_cnt %d vs. expected %d", + info.func_info_cnt, finfo_cnt); + goto err_free; + } + + if (info.func_info_rec_size != finfo_rec_size) { + p_err("incorrect func_info_rec_size %d vs. expected %d", + info.func_info_rec_size, finfo_rec_size); + goto err_free; + } + if ((member_len == &info.jited_prog_len && info.jited_prog_insns == 0) || (member_len == &info.xlated_prog_len && @@ -590,6 +622,11 @@ static int do_dump(int argc, char **argv) goto err_free; } + if (info.btf_id && btf_get_from_id(info.btf_id, &btf)) { + p_err("failed to get btf"); + goto err_free; + } + if (filepath) { fd = open(filepath, O_WRONLY | O_CREAT | O_TRUNC, 0600); if (fd < 0) { @@ -622,6 +659,7 @@ static int do_dump(int argc, char **argv) if (info.nr_jited_func_lens && info.jited_func_lens) { struct kernel_sym *sym = NULL; + struct bpf_func_info *record; char sym_name[SYM_MAX_NAME]; unsigned char *img = buf; __u64 *ksyms = NULL; @@ -648,12 +686,25 @@ static int do_dump(int argc, char **argv) strcpy(sym_name, "unknown"); } + if (func_info) { + record = func_info + i * finfo_rec_size; + btf_dumper_type_only(btf, record->type_id, + func_sig, + sizeof(func_sig)); + } + if (json_output) { jsonw_start_object(json_wtr); + if (func_info && func_sig[0] != '\0') { + jsonw_name(json_wtr, "proto"); + jsonw_string(json_wtr, func_sig); + } jsonw_name(json_wtr, "name"); jsonw_string(json_wtr, sym_name); jsonw_name(json_wtr, "insns"); } else { + if (func_info && func_sig[0] != '\0') + printf("%s:\n", func_sig); printf("%s:\n", sym_name); } @@ -682,6 +733,9 @@ static int do_dump(int argc, char **argv) kernel_syms_load(&dd); dd.nr_jited_ksyms = info.nr_jited_ksyms; dd.jited_ksyms = (__u64 *) info.jited_ksyms; + dd.btf = btf; + dd.func_info = func_info; + dd.finfo_rec_size = finfo_rec_size; if (json_output) dump_xlated_json(&dd, buf, *member_len, opcodes); @@ -693,12 +747,14 @@ static int do_dump(int argc, char **argv) free(buf); free(func_ksyms); free(func_lens); + free(func_info); return 0; err_free: free(buf); free(func_ksyms); free(func_lens); + free(func_info); return -1; } |