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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>
70 lines
1.5 KiB
C
70 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2017 Josh Poimboeuf <jpoimboe@redhat.com>
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*/
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#ifndef _CHECK_H
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#define _CHECK_H
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#include <stdbool.h>
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#include "cfi.h"
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#include "arch.h"
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struct insn_state {
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struct cfi_state cfi;
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unsigned int uaccess_stack;
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bool uaccess;
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bool df;
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bool noinstr;
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s8 instr;
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};
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struct instruction {
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struct list_head list;
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struct hlist_node hash;
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struct list_head static_call_node;
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struct section *sec;
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unsigned long offset;
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unsigned int len;
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enum insn_type type;
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unsigned long immediate;
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bool dead_end, ignore, ignore_alts;
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bool hint;
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bool retpoline_safe;
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s8 instr;
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u8 visited;
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u8 ret_offset;
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int alt_group;
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struct symbol *call_dest;
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struct instruction *jump_dest;
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struct instruction *first_jump_src;
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struct reloc *jump_table;
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struct list_head alts;
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struct symbol *func;
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struct list_head stack_ops;
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struct cfi_state cfi;
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#ifdef INSN_USE_ORC
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struct orc_entry orc;
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#endif
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};
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static inline bool is_static_jump(struct instruction *insn)
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{
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return insn->type == INSN_JUMP_CONDITIONAL ||
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insn->type == INSN_JUMP_UNCONDITIONAL;
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}
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struct instruction *find_insn(struct objtool_file *file,
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struct section *sec, unsigned long offset);
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#define for_each_insn(file, insn) \
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list_for_each_entry(insn, &file->insn_list, list)
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#define sec_for_each_insn(file, sec, insn) \
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for (insn = find_insn(file, sec, 0); \
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insn && &insn->list != &file->insn_list && \
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insn->sec == sec; \
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insn = list_next_entry(insn, list))
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#endif /* _CHECK_H */
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