1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * Copyright (C) 2017 Josh Poimboeuf <jpoimboe@redhat.com>
4 */
5
6 #ifndef _CHECK_H
7 #define _CHECK_H
8
9 #include <stdbool.h>
10 #include <objtool/cfi.h>
11 #include <objtool/arch.h>
12
13 struct insn_state {
14 struct cfi_state cfi;
15 unsigned int uaccess_stack;
16 bool uaccess;
17 bool df;
18 bool noinstr;
19 s8 instr;
20 };
21
22 struct alt_group {
23 /*
24 * Pointer from a replacement group to the original group. NULL if it
25 * *is* the original group.
26 */
27 struct alt_group *orig_group;
28
29 /* First and last instructions in the group */
30 struct instruction *first_insn, *last_insn;
31
32 /*
33 * Byte-offset-addressed len-sized array of pointers to CFI structs.
34 * This is shared with the other alt_groups in the same alternative.
35 */
36 struct cfi_state **cfi;
37 };
38
39 struct instruction {
40 struct list_head list;
41 struct hlist_node hash;
42 struct list_head call_node;
43 struct list_head mcount_loc_node;
44 struct section *sec;
45 unsigned long offset;
46 unsigned int len;
47 enum insn_type type;
48 unsigned long immediate;
49 bool dead_end, ignore, ignore_alts;
50 bool hint;
51 bool retpoline_safe;
52 s8 instr;
53 u8 visited;
54 struct alt_group *alt_group;
55 struct symbol *call_dest;
56 struct instruction *jump_dest;
57 struct instruction *first_jump_src;
58 struct reloc *jump_table;
59 struct reloc *reloc;
60 struct list_head alts;
61 struct symbol *func;
62 struct list_head stack_ops;
63 struct cfi_state cfi;
64 };
65
is_static_jump(struct instruction * insn)66 static inline bool is_static_jump(struct instruction *insn)
67 {
68 return insn->type == INSN_JUMP_CONDITIONAL ||
69 insn->type == INSN_JUMP_UNCONDITIONAL;
70 }
71
is_dynamic_jump(struct instruction * insn)72 static inline bool is_dynamic_jump(struct instruction *insn)
73 {
74 return insn->type == INSN_JUMP_DYNAMIC ||
75 insn->type == INSN_JUMP_DYNAMIC_CONDITIONAL;
76 }
77
is_jump(struct instruction * insn)78 static inline bool is_jump(struct instruction *insn)
79 {
80 return is_static_jump(insn) || is_dynamic_jump(insn);
81 }
82
83 struct instruction *find_insn(struct objtool_file *file,
84 struct section *sec, unsigned long offset);
85
86 #define for_each_insn(file, insn) \
87 list_for_each_entry(insn, &file->insn_list, list)
88
89 #define sec_for_each_insn(file, sec, insn) \
90 for (insn = find_insn(file, sec, 0); \
91 insn && &insn->list != &file->insn_list && \
92 insn->sec == sec; \
93 insn = list_next_entry(insn, list))
94
95 #endif /* _CHECK_H */
96
