| 1 | |
| 2 | |
| 3 | * Copyright (C) 2015 Josh Poimboeuf <[email protected]>
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| 4 |
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| 5 |
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| 6 | #include <stdio.h>
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| 7 | #include <stdbool.h>
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| 8 | #include <string.h>
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| 9 | #include <stdlib.h>
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| 10 | #include <unistd.h>
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| 11 | #include <subcmd/exec-cmd.h>
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| 12 | #include <subcmd/pager.h>
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| 13 | #include <linux/kernel.h>
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| 14 |
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| 15 | #include <objtool/builtin.h>
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| 16 | #include <objtool/objtool.h>
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| 17 | #include <objtool/warn.h>
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| 18 |
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| 19 | bool help;
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| 20 |
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| 21 | static struct objtool_file file;
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| 22 |
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| 23 | struct objtool_file *objtool_open_read(const char *filename)
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| 24 | {
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| 25 | if (file.elf) {
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| 26 | ERROR("won't handle more than one file at a time");
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| 27 | return NULL;
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| 28 | }
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| 29 |
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| 30 | file.elf = elf_open_read(filename, O_RDWR);
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| 31 | if (!file.elf)
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| 32 | return NULL;
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| 33 |
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| 34 | hash_init(file.insn_hash);
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| 35 | INIT_LIST_HEAD(&file.retpoline_call_list);
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| 36 | INIT_LIST_HEAD(&file.return_thunk_list);
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| 37 | INIT_LIST_HEAD(&file.static_call_list);
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| 38 | INIT_LIST_HEAD(&file.mcount_loc_list);
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| 39 | INIT_LIST_HEAD(&file.endbr_list);
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| 40 | INIT_LIST_HEAD(&file.call_list);
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| 41 | file.ignore_unreachables = opts.no_unreachable;
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| 42 | file.hints = false;
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| 43 |
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| 44 | return &file;
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| 45 | }
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| 46 |
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| 47 | int objtool_pv_add(struct objtool_file *f, int idx, struct symbol *func)
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| 48 | {
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| 49 | if (!opts.noinstr)
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| 50 | return 0;
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| 51 |
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| 52 | if (!f->pv_ops) {
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| 53 | ERROR("paravirt confusion");
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| 54 | return -1;
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| 55 | }
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| 56 |
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| 57 | |
| 58 | * These functions will be patched into native code,
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| 59 | * see paravirt_patch().
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| 60 |
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| 61 | if (!strcmp(func->name, "_paravirt_nop") ||
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| 62 | !strcmp(func->name, "_paravirt_ident_64"))
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| 63 | return 0;
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| 64 |
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| 65 |
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| 66 | if (!list_empty(&func->pv_target))
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| 67 | return 0;
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| 68 |
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| 69 | list_add(&func->pv_target, &f->pv_ops[idx].targets);
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| 70 | f->pv_ops[idx].clean = false;
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| 71 | return 0;
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| 72 | }
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| 73 |
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| 74 | int main(int argc, const char **argv)
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| 75 | {
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| 76 | static const char *UNUSED = "OBJTOOL_NOT_IMPLEMENTED";
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| 77 |
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| 78 |
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| 79 | exec_cmd_init("objtool", UNUSED, UNUSED, UNUSED);
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| 80 | pager_init(UNUSED);
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| 81 |
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| 82 | return objtool_run(argc, argv);
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| 83 | }
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