Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
696e2457 JO |
2 | #include <linux/compiler.h> |
3 | ||
dbdebdc5 RB |
4 | static struct ins_ops *powerpc__associate_instruction_ops(struct arch *arch, const char *name) |
5 | { | |
6 | int i; | |
7 | struct ins_ops *ops; | |
8 | ||
9 | /* | |
10 | * - Interested only if instruction starts with 'b'. | |
11 | * - Few start with 'b', but aren't branch instructions. | |
12 | */ | |
13 | if (name[0] != 'b' || | |
14 | !strncmp(name, "bcd", 3) || | |
15 | !strncmp(name, "brinc", 5) || | |
16 | !strncmp(name, "bper", 4)) | |
17 | return NULL; | |
18 | ||
19 | ops = &jump_ops; | |
20 | ||
21 | i = strlen(name) - 1; | |
22 | if (i < 0) | |
23 | return NULL; | |
24 | ||
25 | /* ignore optional hints at the end of the instructions */ | |
26 | if (name[i] == '+' || name[i] == '-') | |
27 | i--; | |
28 | ||
29 | if (name[i] == 'l' || (name[i] == 'a' && name[i-1] == 'l')) { | |
30 | /* | |
31 | * if the instruction ends up with 'l' or 'la', then | |
32 | * those are considered 'calls' since they update LR. | |
33 | * ... except for 'bnl' which is branch if not less than | |
34 | * and the absolute form of the same. | |
35 | */ | |
36 | if (strcmp(name, "bnl") && strcmp(name, "bnl+") && | |
37 | strcmp(name, "bnl-") && strcmp(name, "bnla") && | |
38 | strcmp(name, "bnla+") && strcmp(name, "bnla-")) | |
39 | ops = &call_ops; | |
40 | } | |
41 | if (name[i] == 'r' && name[i-1] == 'l') | |
42 | /* | |
43 | * instructions ending with 'lr' are considered to be | |
44 | * return instructions | |
45 | */ | |
46 | ops = &ret_ops; | |
47 | ||
48 | arch__associate_ins_ops(arch, name, ops); | |
49 | return ops; | |
50 | } | |
51 | ||
696e2457 | 52 | static int powerpc__annotate_init(struct arch *arch, char *cpuid __maybe_unused) |
dbdebdc5 RB |
53 | { |
54 | if (!arch->initialized) { | |
55 | arch->initialized = true; | |
56 | arch->associate_instruction_ops = powerpc__associate_instruction_ops; | |
57 | arch->objdump.comment_char = '#'; | |
58 | } | |
59 | ||
60 | return 0; | |
61 | } |