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d871f7b5a6
The way to identify jump tables and retrieve all the data necessary to
handle the different execution branches is not the same on all
architectures. In order to be able to add other architecture support,
define an arch-dependent function to process jump-tables.
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Signed-off-by: Raphael Gault <raphael.gault@arm.com>
[J.T.: Move arm64 bits out of this patch,
Have only one function to find the start of the jump table,
for now assume that the jump table format will be the same as
x86]
Signed-off-by: Julien Thierry <jthierry@redhat.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
42 lines
927 B
C
42 lines
927 B
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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#ifndef _SPECIAL_H
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#define _SPECIAL_H
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#include <stdbool.h>
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#include "check.h"
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#include "elf.h"
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#define C_JUMP_TABLE_SECTION ".rodata..c_jump_table"
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struct special_alt {
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struct list_head list;
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bool group;
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bool skip_orig;
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bool skip_alt;
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bool jump_or_nop;
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struct section *orig_sec;
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unsigned long orig_off;
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struct section *new_sec;
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unsigned long new_off;
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unsigned int orig_len, new_len; /* group only */
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};
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int special_get_alts(struct elf *elf, struct list_head *alts);
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void arch_handle_alternative(unsigned short feature, struct special_alt *alt);
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bool arch_support_alt_relocation(struct special_alt *special_alt,
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struct instruction *insn,
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struct reloc *reloc);
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struct reloc *arch_find_switch_table(struct objtool_file *file,
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struct instruction *insn);
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#endif /* _SPECIAL_H */
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