diff options
Diffstat (limited to 'tools/bpf/bpftool/prog.c')
| -rw-r--r-- | tools/bpf/bpftool/prog.c | 100 |
1 files changed, 90 insertions, 10 deletions
diff --git a/tools/bpf/bpftool/prog.c b/tools/bpf/bpftool/prog.c index a9a51123454c..65b921ffd10a 100644 --- a/tools/bpf/bpftool/prog.c +++ b/tools/bpf/bpftool/prog.c @@ -423,24 +423,26 @@ static int do_show(int argc, char **argv) static int do_dump(int argc, char **argv) { + unsigned int finfo_rec_size, linfo_rec_size, jited_linfo_rec_size; + void *func_info = NULL, *linfo = NULL, *jited_linfo = NULL; + unsigned int finfo_cnt, linfo_cnt = 0, jited_linfo_cnt = 0; + struct bpf_prog_linfo *prog_linfo = NULL; unsigned long *func_ksyms = NULL; 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; + bool linum = false; __u32 *member_len; __u64 *member_ptr; ssize_t n; @@ -484,6 +486,9 @@ static int do_dump(int argc, char **argv) } else if (is_prefix(*argv, "visual")) { visual = true; NEXT_ARG(); + } else if (is_prefix(*argv, "linum")) { + linum = true; + NEXT_ARG(); } if (argc) { @@ -543,6 +548,32 @@ static int do_dump(int argc, char **argv) } } + linfo_rec_size = info.line_info_rec_size; + if (info.line_info_cnt && linfo_rec_size && info.btf_id) { + linfo_cnt = info.line_info_cnt; + linfo = malloc(linfo_cnt * linfo_rec_size); + if (!linfo) { + p_err("mem alloc failed"); + close(fd); + goto err_free; + } + } + + jited_linfo_rec_size = info.jited_line_info_rec_size; + if (info.jited_line_info_cnt && + jited_linfo_rec_size && + info.nr_jited_ksyms && + info.nr_jited_func_lens && + info.btf_id) { + jited_linfo_cnt = info.jited_line_info_cnt; + jited_linfo = malloc(jited_linfo_cnt * jited_linfo_rec_size); + if (!jited_linfo) { + p_err("mem alloc failed"); + close(fd); + goto err_free; + } + } + memset(&info, 0, sizeof(info)); *member_ptr = ptr_to_u64(buf); @@ -554,6 +585,13 @@ static int do_dump(int argc, char **argv) info.func_info_cnt = finfo_cnt; info.func_info_rec_size = finfo_rec_size; info.func_info = ptr_to_u64(func_info); + info.line_info_cnt = linfo_cnt; + info.line_info_rec_size = linfo_rec_size; + info.line_info = ptr_to_u64(linfo); + info.jited_line_info_cnt = jited_linfo_cnt; + info.jited_line_info_rec_size = jited_linfo_rec_size; + info.jited_line_info = ptr_to_u64(jited_linfo); + err = bpf_obj_get_info_by_fd(fd, &info, &len); close(fd); @@ -596,6 +634,30 @@ static int do_dump(int argc, char **argv) finfo_cnt = 0; } + if (linfo && info.line_info_cnt != linfo_cnt) { + p_err("incorrect line_info_cnt %u vs. expected %u", + info.line_info_cnt, linfo_cnt); + goto err_free; + } + + if (info.line_info_rec_size != linfo_rec_size) { + p_err("incorrect line_info_rec_size %u vs. expected %u", + info.line_info_rec_size, linfo_rec_size); + goto err_free; + } + + if (jited_linfo && info.jited_line_info_cnt != jited_linfo_cnt) { + p_err("incorrect jited_line_info_cnt %u vs. expected %u", + info.jited_line_info_cnt, jited_linfo_cnt); + goto err_free; + } + + if (info.jited_line_info_rec_size != jited_linfo_rec_size) { + p_err("incorrect jited_line_info_rec_size %u vs. expected %u", + info.jited_line_info_rec_size, jited_linfo_rec_size); + goto err_free; + } + if ((member_len == &info.jited_prog_len && info.jited_prog_insns == 0) || (member_len == &info.xlated_prog_len && @@ -609,6 +671,12 @@ static int do_dump(int argc, char **argv) goto err_free; } + if (linfo_cnt) { + prog_linfo = bpf_prog_linfo__new(&info); + if (!prog_linfo) + p_err("error in processing bpf_line_info. continue without it."); + } + if (filepath) { fd = open(filepath, O_WRONLY | O_CREAT | O_TRUNC, 0600); if (fd < 0) { @@ -690,8 +758,11 @@ static int do_dump(int argc, char **argv) printf("%s:\n", sym_name); } - disasm_print_insn(img, lens[i], opcodes, name, - disasm_opt); + disasm_print_insn(img, lens[i], opcodes, + name, disasm_opt, btf, + prog_linfo, ksyms[i], i, + linum); + img += lens[i]; if (json_output) @@ -704,7 +775,7 @@ static int do_dump(int argc, char **argv) jsonw_end_array(json_wtr); } else { disasm_print_insn(buf, *member_len, opcodes, name, - disasm_opt); + disasm_opt, btf, NULL, 0, 0, false); } } else if (visual) { if (json_output) @@ -718,11 +789,14 @@ static int do_dump(int argc, char **argv) dd.btf = btf; dd.func_info = func_info; dd.finfo_rec_size = finfo_rec_size; + dd.prog_linfo = prog_linfo; if (json_output) - dump_xlated_json(&dd, buf, *member_len, opcodes); + dump_xlated_json(&dd, buf, *member_len, opcodes, + linum); else - dump_xlated_plain(&dd, buf, *member_len, opcodes); + dump_xlated_plain(&dd, buf, *member_len, opcodes, + linum); kernel_syms_destroy(&dd); } @@ -730,6 +804,9 @@ static int do_dump(int argc, char **argv) free(func_ksyms); free(func_lens); free(func_info); + free(linfo); + free(jited_linfo); + bpf_prog_linfo__free(prog_linfo); return 0; err_free: @@ -737,6 +814,9 @@ err_free: free(func_ksyms); free(func_lens); free(func_info); + free(linfo); + free(jited_linfo); + bpf_prog_linfo__free(prog_linfo); return -1; } @@ -1138,8 +1218,8 @@ static int do_help(int argc, char **argv) fprintf(stderr, "Usage: %s %s { show | list } [PROG]\n" - " %s %s dump xlated PROG [{ file FILE | opcodes | visual }]\n" - " %s %s dump jited PROG [{ file FILE | opcodes }]\n" + " %s %s dump xlated PROG [{ file FILE | opcodes | visual | linum }]\n" + " %s %s dump jited PROG [{ file FILE | opcodes | linum }]\n" " %s %s pin PROG FILE\n" " %s %s { load | loadall } OBJ PATH \\\n" " [type TYPE] [dev NAME] \\\n" |