1
2#include <linux/compiler.h>
3#include <linux/zalloc.h>
4#include <sys/types.h>
5#include <regex.h>
6#include <stdlib.h>
7
8struct arm_annotate {
9 regex_t call_insn,
10 jump_insn;
11};
12
13static struct ins_ops *arm__associate_instruction_ops(struct arch *arch, const char *name)
14{
15 struct arm_annotate *arm = arch->priv;
16 struct ins_ops *ops;
17 regmatch_t match[2];
18
19 if (!regexec(&arm->call_insn, name, 2, match, 0))
20 ops = &call_ops;
21 else if (!regexec(&arm->jump_insn, name, 2, match, 0))
22 ops = &jump_ops;
23 else
24 return NULL;
25
26 arch__associate_ins_ops(arch, name, ops);
27 return ops;
28}
29
30static int arm__annotate_init(struct arch *arch, char *cpuid __maybe_unused)
31{
32 struct arm_annotate *arm;
33 int err;
34
35 if (arch->initialized)
36 return 0;
37
38 arm = zalloc(sizeof(*arm));
39 if (!arm)
40 return ENOMEM;
41
42#define ARM_CONDS "(cc|cs|eq|ge|gt|hi|le|ls|lt|mi|ne|pl|vc|vs)"
43 err = regcomp(&arm->call_insn, "^blx?" ARM_CONDS "?$", REG_EXTENDED);
44 if (err)
45 goto out_free_arm;
46 err = regcomp(&arm->jump_insn, "^bx?" ARM_CONDS "?$", REG_EXTENDED);
47 if (err)
48 goto out_free_call;
49#undef ARM_CONDS
50
51 arch->initialized = true;
52 arch->priv = arm;
53 arch->associate_instruction_ops = arm__associate_instruction_ops;
54 arch->objdump.comment_char = ';';
55 arch->objdump.skip_functions_char = '+';
56 return 0;
57
58out_free_call:
59 regfree(&arm->call_insn);
60out_free_arm:
61 free(arm);
62 return SYMBOL_ANNOTATE_ERRNO__ARCH_INIT_REGEXP;
63}
64
