objtool: Ditch subcommands

Objtool has a fairly singular focus.  It runs on object files and does
validations and transformations which can be combined in various ways.
The subcommand model has never been a good fit, making it awkward to
combine and remove options.

Remove the "check" and "orc" subcommands in favor of a more traditional
cmdline option model.  This makes it much more flexible to use, and
easier to port individual features to other arches.

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Link: https://lkml.kernel.org/r/5c61ebf805e90aefc5fa62bc63468ffae53b9df6.1650300597.git.jpoimboe@redhat.com

1 files changed, 1 insertions, 96 deletions

diff --git a/tools/objtool/objtool.c b/tools/objtool/objtool.c
index a0f3d3c9558d..512669ce064c 100644
--- a/tools/objtool/objtool.c
+++ b/tools/objtool/objtool.c
@@ -3,16 +3,6 @@
  * Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com>
  */
 
-/*
- * objtool:
- *
- * The 'check' subcmd analyzes every .o file and ensures the validity of its
- * stack trace metadata.  It enforces a set of rules on asm code and C inline
- * assembly code so that stack traces can be reliable.
- *
- * For more information, see tools/objtool/Documentation/stack-validation.txt.
- */
-
 #include <stdio.h>
 #include <stdbool.h>
 #include <string.h>
@@ -26,20 +16,6 @@
 #include <objtool/objtool.h>
 #include <objtool/warn.h>
 
-struct cmd_struct {
-	const char *name;
-	int (*fn)(int, const char **);
-	const char *help;
-};
-
-static const char objtool_usage_string[] =
-	"objtool COMMAND [ARGS]";
-
-static struct cmd_struct objtool_cmds[] = {
-	{"check",	cmd_check,	"Perform stack metadata validation on an object file" },
-	{"orc",		cmd_orc,	"Generate in-place ORC unwind tables for an object file" },
-};
-
 bool help;
 
 const char *objname;
@@ -161,70 +137,6 @@ void objtool_pv_add(struct objtool_file *f, int idx, struct symbol *func)
 	f->pv_ops[idx].clean = false;
 }
 
-static void cmd_usage(void)
-{
-	unsigned int i, longest = 0;
-
-	printf("\n usage: %s\n\n", objtool_usage_string);
-
-	for (i = 0; i < ARRAY_SIZE(objtool_cmds); i++) {
-		if (longest < strlen(objtool_cmds[i].name))
-			longest = strlen(objtool_cmds[i].name);
-	}
-
-	puts(" Commands:");
-	for (i = 0; i < ARRAY_SIZE(objtool_cmds); i++) {
-		printf("   %-*s   ", longest, objtool_cmds[i].name);
-		puts(objtool_cmds[i].help);
-	}
-
-	printf("\n");
-
-	if (!help)
-		exit(129);
-	exit(0);
-}
-
-static void handle_options(int *argc, const char ***argv)
-{
-	while (*argc > 0) {
-		const char *cmd = (*argv)[0];
-
-		if (cmd[0] != '-')
-			break;
-
-		if (!strcmp(cmd, "--help") || !strcmp(cmd, "-h")) {
-			help = true;
-			break;
-		} else {
-			fprintf(stderr, "Unknown option: %s\n", cmd);
-			cmd_usage();
-		}
-
-		(*argv)++;
-		(*argc)--;
-	}
-}
-
-static void handle_internal_command(int argc, const char **argv)
-{
-	const char *cmd = argv[0];
-	unsigned int i, ret;
-
-	for (i = 0; i < ARRAY_SIZE(objtool_cmds); i++) {
-		struct cmd_struct *p = objtool_cmds+i;
-
-		if (strcmp(p->name, cmd))
-			continue;
-
-		ret = p->fn(argc, argv);
-
-		exit(ret);
-	}
-
-	cmd_usage();
-}
-
 int main(int argc, const char **argv)
 {
 	static const char *UNUSED = "OBJTOOL_NOT_IMPLEMENTED";
@@ -233,14 +145,7 @@ int main(int argc, const char **argv)
 	exec_cmd_init("objtool", UNUSED, UNUSED, UNUSED);
 	pager_init(UNUSED);
 
-	argv++;
-	argc--;
-	handle_options(&argc, &argv);
-
-	if (!argc || help)
-		cmd_usage();
-
-	handle_internal_command(argc, argv);
+	objtool_run(argc, argv);
 
 	return 0;
 }