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| 2 | |
| 3 | * Copyright (C) 2015 Josh Poimboeuf <[email protected]>
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| 4 |
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| 5 |
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| 6 | |
| 7 | * objtool:
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| 8 | *
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| 9 | * The 'check' subcmd analyzes every .o file and ensures the validity of its
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| 10 | * stack trace metadata. It enforces a set of rules on asm code and C inline
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| 11 | * assembly code so that stack traces can be reliable.
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| 12 | *
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| 13 | * For more information, see tools/objtool/Documentation/stack-validation.txt.
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| 14 |
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| 15 |
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| 16 | #include <stdio.h>
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| 17 | #include <stdbool.h>
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| 18 | #include <string.h>
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| 19 | #include <stdlib.h>
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| 20 | #include <subcmd/exec-cmd.h>
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| 21 | #include <subcmd/pager.h>
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| 22 | #include <linux/kernel.h>
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| 23 |
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| 24 | #include "builtin.h"
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| 25 |
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| 26 | struct cmd_struct {
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| 27 | const char *name;
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| 28 | int (*fn)(int, const char **);
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| 29 | const char *help;
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| 30 | };
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| 31 |
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| 32 | static const char objtool_usage_string[] =
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| 33 | "objtool COMMAND [ARGS]";
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| 34 |
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| 35 | static struct cmd_struct objtool_cmds[] = {
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| 36 | {"check", cmd_check, "Perform stack metadata validation on an object file" },
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| 37 | {"orc", cmd_orc, "Generate in-place ORC unwind tables for an object file" },
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| 38 | };
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| 39 |
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| 40 | bool help;
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| 41 |
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| 42 | static void cmd_usage(void)
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| 43 | {
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| 44 | unsigned int i, longest = 0;
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| 45 |
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| 46 | printf("\n usage: %s\n\n", objtool_usage_string);
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| 47 |
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| 48 | for (i = 0; i < ARRAY_SIZE(objtool_cmds); i++) {
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| 49 | if (longest < strlen(objtool_cmds[i].name))
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| 50 | longest = strlen(objtool_cmds[i].name);
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| 51 | }
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| 52 |
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| 53 | puts(" Commands:");
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| 54 | for (i = 0; i < ARRAY_SIZE(objtool_cmds); i++) {
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| 55 | printf(" %-*s ", longest, objtool_cmds[i].name);
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| 56 | puts(objtool_cmds[i].help);
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| 57 | }
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| 58 |
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| 59 | printf("\n");
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| 60 |
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| 61 | exit(129);
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| 62 | }
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| 63 |
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| 64 | static void handle_options(int *argc, const char ***argv)
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| 65 | {
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| 66 | while (*argc > 0) {
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| 67 | const char *cmd = (*argv)[0];
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| 68 |
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| 69 | if (cmd[0] != '-')
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| 70 | break;
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| 71 |
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| 72 | if (!strcmp(cmd, "--help") || !strcmp(cmd, "-h")) {
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| 73 | help = true;
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| 74 | break;
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| 75 | } else {
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| 76 | fprintf(stderr, "Unknown option: %s\n", cmd);
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| 77 | cmd_usage();
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| 78 | }
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| 79 |
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| 80 | (*argv)++;
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| 81 | (*argc)--;
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| 82 | }
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| 83 | }
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| 84 |
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| 85 | static void handle_internal_command(int argc, const char **argv)
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| 86 | {
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| 87 | const char *cmd = argv[0];
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| 88 | unsigned int i, ret;
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| 89 |
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| 90 | for (i = 0; i < ARRAY_SIZE(objtool_cmds); i++) {
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| 91 | struct cmd_struct *p = objtool_cmds+i;
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| 92 |
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| 93 | if (strcmp(p->name, cmd))
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| 94 | continue;
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| 95 |
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| 96 | ret = p->fn(argc, argv);
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| 97 |
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| 98 | exit(ret);
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| 99 | }
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| 100 |
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| 101 | cmd_usage();
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| 102 | }
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| 103 |
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| 104 | int main(int argc, const char **argv)
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| 105 | {
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| 106 | static const char *UNUSED = "OBJTOOL_NOT_IMPLEMENTED";
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| 107 |
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| 108 |
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| 109 | exec_cmd_init("objtool", UNUSED, UNUSED, UNUSED);
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| 110 | pager_init(UNUSED);
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| 111 |
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| 112 | argv++;
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| 113 | argc--;
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| 114 | handle_options(&argc, &argv);
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| 115 |
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| 116 | if (!argc || help)
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| 117 | cmd_usage();
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| 118 |
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| 119 | handle_internal_command(argc, argv);
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| 120 |
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| 121 | return 0;
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| 122 | }
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