| 1 | |
| 2 | |
| 3 | * Copyright (C) 2015 Josh Poimboeuf <[email protected]>
|
| 4 |
|
| 5 |
|
| 6 | #include <stdio.h>
|
| 7 | #include <stdbool.h>
|
| 8 | #include <string.h>
|
| 9 | #include <stdlib.h>
|
| 10 | #include <unistd.h>
|
| 11 | #include <subcmd/exec-cmd.h>
|
| 12 | #include <subcmd/pager.h>
|
| 13 | #include <linux/kernel.h>
|
| 14 |
|
| 15 | #include <objtool/builtin.h>
|
| 16 | #include <objtool/objtool.h>
|
| 17 | #include <objtool/warn.h>
|
| 18 |
|
| 19 | static struct objtool_file file;
|
| 20 |
|
| 21 | struct objtool_file *objtool_open_read(const char *filename)
|
| 22 | {
|
| 23 | if (file.elf) {
|
| 24 | ERROR("won't handle more than one file at a time");
|
| 25 | return NULL;
|
| 26 | }
|
| 27 |
|
| 28 | file.elf = elf_open_read(filename, O_RDWR);
|
| 29 | if (!file.elf)
|
| 30 | return NULL;
|
| 31 |
|
| 32 | hash_init(file.insn_hash);
|
| 33 | INIT_LIST_HEAD(&file.retpoline_call_list);
|
| 34 | INIT_LIST_HEAD(&file.return_thunk_list);
|
| 35 | INIT_LIST_HEAD(&file.static_call_list);
|
| 36 | INIT_LIST_HEAD(&file.mcount_loc_list);
|
| 37 | INIT_LIST_HEAD(&file.endbr_list);
|
| 38 | INIT_LIST_HEAD(&file.call_list);
|
| 39 | file.ignore_unreachables = opts.no_unreachable;
|
| 40 | file.hints = false;
|
| 41 |
|
| 42 | return &file;
|
| 43 | }
|
| 44 |
|
| 45 | int objtool_pv_add(struct objtool_file *f, int idx, struct symbol *func)
|
| 46 | {
|
| 47 | if (!opts.noinstr)
|
| 48 | return 0;
|
| 49 |
|
| 50 | if (!f->pv_ops) {
|
| 51 | ERROR("paravirt confusion");
|
| 52 | return -1;
|
| 53 | }
|
| 54 |
|
| 55 | |
| 56 | * These functions will be patched into native code,
|
| 57 | * see paravirt_patch().
|
| 58 |
|
| 59 | if (!strcmp(func->name, "_paravirt_nop") ||
|
| 60 | !strcmp(func->name, "_paravirt_ident_64"))
|
| 61 | return 0;
|
| 62 |
|
| 63 |
|
| 64 | if (!list_empty(&func->pv_target))
|
| 65 | return 0;
|
| 66 |
|
| 67 | list_add(&func->pv_target, &f->pv_ops[idx].targets);
|
| 68 | f->pv_ops[idx].clean = false;
|
| 69 | return 0;
|
| 70 | }
|
| 71 |
|
| 72 | char *top_level_dir(const char *file)
|
| 73 | {
|
| 74 | ssize_t len, self_len, file_len;
|
| 75 | char self[PATH_MAX], *str;
|
| 76 | int i;
|
| 77 |
|
| 78 | len = readlink("/proc/self/exe", self, sizeof(self) - 1);
|
| 79 | if (len <= 0)
|
| 80 | return NULL;
|
| 81 | self[len] = '\0';
|
| 82 |
|
| 83 | for (i = 0; i < 3; i++) {
|
| 84 | char *s = strrchr(self, '/');
|
| 85 | if (!s)
|
| 86 | return NULL;
|
| 87 | *s = '\0';
|
| 88 | }
|
| 89 |
|
| 90 | self_len = strlen(self);
|
| 91 | file_len = strlen(file);
|
| 92 |
|
| 93 | str = malloc(self_len + file_len + 2);
|
| 94 | if (!str)
|
| 95 | return NULL;
|
| 96 |
|
| 97 | memcpy(str, self, self_len);
|
| 98 | str[self_len] = '/';
|
| 99 | strcpy(str + self_len + 1, file);
|
| 100 |
|
| 101 | return str;
|
| 102 | }
|
| 103 |
|
| 104 | int main(int argc, const char **argv)
|
| 105 | {
|
| 106 | static const char *UNUSED = "OBJTOOL_NOT_IMPLEMENTED";
|
| 107 |
|
| 108 | if (init_signal_handler())
|
| 109 | return -1;
|
| 110 |
|
| 111 |
|
| 112 | exec_cmd_init("objtool", UNUSED, UNUSED, UNUSED);
|
| 113 | pager_init(UNUSED);
|
| 114 |
|
| 115 | if (argc > 1 && !strcmp(argv[1], "klp")) {
|
| 116 | argc--;
|
| 117 | argv++;
|
| 118 | return cmd_klp(argc, argv);
|
| 119 | }
|
| 120 |
|
| 121 | return objtool_run(argc, argv);
|
| 122 | }
|