1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun #include <linux/compiler.h>
3*4882a593Smuzhiyun
powerpc__associate_instruction_ops(struct arch * arch,const char * name)4*4882a593Smuzhiyun static struct ins_ops *powerpc__associate_instruction_ops(struct arch *arch, const char *name)
5*4882a593Smuzhiyun {
6*4882a593Smuzhiyun int i;
7*4882a593Smuzhiyun struct ins_ops *ops;
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun /*
10*4882a593Smuzhiyun * - Interested only if instruction starts with 'b'.
11*4882a593Smuzhiyun * - Few start with 'b', but aren't branch instructions.
12*4882a593Smuzhiyun */
13*4882a593Smuzhiyun if (name[0] != 'b' ||
14*4882a593Smuzhiyun !strncmp(name, "bcd", 3) ||
15*4882a593Smuzhiyun !strncmp(name, "brinc", 5) ||
16*4882a593Smuzhiyun !strncmp(name, "bper", 4))
17*4882a593Smuzhiyun return NULL;
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun ops = &jump_ops;
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun i = strlen(name) - 1;
22*4882a593Smuzhiyun if (i < 0)
23*4882a593Smuzhiyun return NULL;
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun /* ignore optional hints at the end of the instructions */
26*4882a593Smuzhiyun if (name[i] == '+' || name[i] == '-')
27*4882a593Smuzhiyun i--;
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun if (name[i] == 'l' || (name[i] == 'a' && name[i-1] == 'l')) {
30*4882a593Smuzhiyun /*
31*4882a593Smuzhiyun * if the instruction ends up with 'l' or 'la', then
32*4882a593Smuzhiyun * those are considered 'calls' since they update LR.
33*4882a593Smuzhiyun * ... except for 'bnl' which is branch if not less than
34*4882a593Smuzhiyun * and the absolute form of the same.
35*4882a593Smuzhiyun */
36*4882a593Smuzhiyun if (strcmp(name, "bnl") && strcmp(name, "bnl+") &&
37*4882a593Smuzhiyun strcmp(name, "bnl-") && strcmp(name, "bnla") &&
38*4882a593Smuzhiyun strcmp(name, "bnla+") && strcmp(name, "bnla-"))
39*4882a593Smuzhiyun ops = &call_ops;
40*4882a593Smuzhiyun }
41*4882a593Smuzhiyun if (name[i] == 'r' && name[i-1] == 'l')
42*4882a593Smuzhiyun /*
43*4882a593Smuzhiyun * instructions ending with 'lr' are considered to be
44*4882a593Smuzhiyun * return instructions
45*4882a593Smuzhiyun */
46*4882a593Smuzhiyun ops = &ret_ops;
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun arch__associate_ins_ops(arch, name, ops);
49*4882a593Smuzhiyun return ops;
50*4882a593Smuzhiyun }
51*4882a593Smuzhiyun
powerpc__annotate_init(struct arch * arch,char * cpuid __maybe_unused)52*4882a593Smuzhiyun static int powerpc__annotate_init(struct arch *arch, char *cpuid __maybe_unused)
53*4882a593Smuzhiyun {
54*4882a593Smuzhiyun if (!arch->initialized) {
55*4882a593Smuzhiyun arch->initialized = true;
56*4882a593Smuzhiyun arch->associate_instruction_ops = powerpc__associate_instruction_ops;
57*4882a593Smuzhiyun arch->objdump.comment_char = '#';
58*4882a593Smuzhiyun }
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun return 0;
61*4882a593Smuzhiyun }
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