1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/compiler.h>
3
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
52 static int powerpc__annotate_init(struct arch *arch, char *cpuid __maybe_unused)
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 }
62
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.