Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
dbdebdc5 RB |
2 | static struct ins_ops *powerpc__associate_instruction_ops(struct arch *arch, const char *name) |
3 | { | |
4 | int i; | |
5 | struct ins_ops *ops; | |
6 | ||
7 | /* | |
8 | * - Interested only if instruction starts with 'b'. | |
9 | * - Few start with 'b', but aren't branch instructions. | |
10 | */ | |
11 | if (name[0] != 'b' || | |
12 | !strncmp(name, "bcd", 3) || | |
13 | !strncmp(name, "brinc", 5) || | |
14 | !strncmp(name, "bper", 4)) | |
15 | return NULL; | |
16 | ||
17 | ops = &jump_ops; | |
18 | ||
19 | i = strlen(name) - 1; | |
20 | if (i < 0) | |
21 | return NULL; | |
22 | ||
23 | /* ignore optional hints at the end of the instructions */ | |
24 | if (name[i] == '+' || name[i] == '-') | |
25 | i--; | |
26 | ||
27 | if (name[i] == 'l' || (name[i] == 'a' && name[i-1] == 'l')) { | |
28 | /* | |
29 | * if the instruction ends up with 'l' or 'la', then | |
30 | * those are considered 'calls' since they update LR. | |
31 | * ... except for 'bnl' which is branch if not less than | |
32 | * and the absolute form of the same. | |
33 | */ | |
34 | if (strcmp(name, "bnl") && strcmp(name, "bnl+") && | |
35 | strcmp(name, "bnl-") && strcmp(name, "bnla") && | |
36 | strcmp(name, "bnla+") && strcmp(name, "bnla-")) | |
37 | ops = &call_ops; | |
38 | } | |
39 | if (name[i] == 'r' && name[i-1] == 'l') | |
40 | /* | |
41 | * instructions ending with 'lr' are considered to be | |
42 | * return instructions | |
43 | */ | |
44 | ops = &ret_ops; | |
45 | ||
46 | arch__associate_ins_ops(arch, name, ops); | |
47 | return ops; | |
48 | } | |
49 | ||
50 | static int powerpc__annotate_init(struct arch *arch) | |
51 | { | |
52 | if (!arch->initialized) { | |
53 | arch->initialized = true; | |
54 | arch->associate_instruction_ops = powerpc__associate_instruction_ops; | |
55 | arch->objdump.comment_char = '#'; | |
56 | } | |
57 | ||
58 | return 0; | |
59 | } |