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Recreating objtool errors can be a manual process. Kbuild removes the object, so it has to be compiled or linked again before running objtool. Then the objtool args need to be reversed engineered. Make that all easier by automatically making a backup of the object file on error, and print a modified version of the args which can be used to recreate. Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/7571e30636359b3e173ce6e122419452bb31882f.1741975349.git.jpoimboe@kernel.org
83 lines
1.7 KiB
C
83 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com>
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*/
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#include <stdio.h>
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#include <stdbool.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <subcmd/exec-cmd.h>
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#include <subcmd/pager.h>
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#include <linux/kernel.h>
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#include <objtool/builtin.h>
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#include <objtool/objtool.h>
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#include <objtool/warn.h>
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bool help;
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static struct objtool_file file;
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struct objtool_file *objtool_open_read(const char *filename)
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{
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if (file.elf) {
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WARN("won't handle more than one file at a time");
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return NULL;
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}
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file.elf = elf_open_read(filename, O_RDWR);
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if (!file.elf)
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return NULL;
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hash_init(file.insn_hash);
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INIT_LIST_HEAD(&file.retpoline_call_list);
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INIT_LIST_HEAD(&file.return_thunk_list);
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INIT_LIST_HEAD(&file.static_call_list);
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INIT_LIST_HEAD(&file.mcount_loc_list);
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INIT_LIST_HEAD(&file.endbr_list);
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INIT_LIST_HEAD(&file.call_list);
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file.ignore_unreachables = opts.no_unreachable;
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file.hints = false;
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return &file;
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}
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void objtool_pv_add(struct objtool_file *f, int idx, struct symbol *func)
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{
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if (!opts.noinstr)
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return;
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if (!f->pv_ops) {
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WARN("paravirt confusion");
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return;
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}
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/*
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* These functions will be patched into native code,
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* see paravirt_patch().
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*/
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if (!strcmp(func->name, "_paravirt_nop") ||
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!strcmp(func->name, "_paravirt_ident_64"))
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return;
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/* already added this function */
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if (!list_empty(&func->pv_target))
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return;
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list_add(&func->pv_target, &f->pv_ops[idx].targets);
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f->pv_ops[idx].clean = false;
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}
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int main(int argc, const char **argv)
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{
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static const char *UNUSED = "OBJTOOL_NOT_IMPLEMENTED";
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/* libsubcmd init */
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exec_cmd_init("objtool", UNUSED, UNUSED, UNUSED);
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pager_init(UNUSED);
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return objtool_run(argc, argv);
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}
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