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33092b4866
commit 43d5430ad7 upstream.
Provide infrastructure for architectures to rewrite/augment compiler
generated retpoline calls. Similar to what we do for static_call()s,
keep track of the instructions that are retpoline calls.
Use the same list_head, since a retpoline call cannot also be a
static_call.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Link: https://lkml.kernel.org/r/20210326151300.130805730@infradead.org
[bwh: Backported to 5.10: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
33 lines
720 B
C
33 lines
720 B
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2020 Matt Helsley <mhelsley@vmware.com>
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*/
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#ifndef _OBJTOOL_H
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#define _OBJTOOL_H
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#include <stdbool.h>
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#include <linux/list.h>
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#include <linux/hashtable.h>
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#include "elf.h"
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#define __weak __attribute__((weak))
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struct objtool_file {
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struct elf *elf;
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struct list_head insn_list;
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DECLARE_HASHTABLE(insn_hash, 20);
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struct list_head retpoline_call_list;
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struct list_head static_call_list;
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bool ignore_unreachables, c_file, hints, rodata;
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};
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struct objtool_file *objtool_open_read(const char *_objname);
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int check(struct objtool_file *file);
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int orc_dump(const char *objname);
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int orc_create(struct objtool_file *file);
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#endif /* _OBJTOOL_H */
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