1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Perf annotate functions.
4  *
5  * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
6  */
7 
loongarch_call__parse(struct arch * arch,struct ins_operands * ops,struct map_symbol * ms,struct disasm_line * dl __maybe_unused)8 static int loongarch_call__parse(struct arch *arch, struct ins_operands *ops, struct map_symbol *ms,
9 		struct disasm_line *dl __maybe_unused)
10 {
11 	char *c, *endptr, *tok, *name;
12 	struct map *map = ms->map;
13 	struct addr_map_symbol target = {
14 		.ms = { .map = map, },
15 	};
16 
17 	c = strchr(ops->raw, '#');
18 	if (c++ == NULL)
19 		return -1;
20 
21 	ops->target.addr = strtoull(c, &endptr, 16);
22 
23 	name = strchr(endptr, '<');
24 	name++;
25 
26 	if (arch->objdump.skip_functions_char &&
27 	    strchr(name, arch->objdump.skip_functions_char))
28 		return -1;
29 
30 	tok = strchr(name, '>');
31 	if (tok == NULL)
32 		return -1;
33 
34 	*tok = '\0';
35 	ops->target.name = strdup(name);
36 	*tok = '>';
37 
38 	if (ops->target.name == NULL)
39 		return -1;
40 
41 	target.addr = map__objdump_2mem(map, ops->target.addr);
42 
43 	if (maps__find_ams(ms->maps, &target) == 0 &&
44 	    map__rip_2objdump(target.ms.map, map__map_ip(target.ms.map, target.addr)) == ops->target.addr)
45 		ops->target.sym = target.ms.sym;
46 
47 	return 0;
48 }
49 
50 static struct ins_ops loongarch_call_ops = {
51 	.parse	   = loongarch_call__parse,
52 	.scnprintf = call__scnprintf,
53 };
54 
loongarch_jump__parse(struct arch * arch,struct ins_operands * ops,struct map_symbol * ms,struct disasm_line * dl __maybe_unused)55 static int loongarch_jump__parse(struct arch *arch, struct ins_operands *ops, struct map_symbol *ms,
56 		struct disasm_line *dl __maybe_unused)
57 {
58 	struct map *map = ms->map;
59 	struct symbol *sym = ms->sym;
60 	struct addr_map_symbol target = {
61 		.ms = { .map = map, },
62 	};
63 	const char *c = strchr(ops->raw, '#');
64 	u64 start, end;
65 
66 	ops->jump.raw_comment = strchr(ops->raw, arch->objdump.comment_char);
67 	ops->jump.raw_func_start = strchr(ops->raw, '<');
68 
69 	if (ops->jump.raw_func_start && c > ops->jump.raw_func_start)
70 		c = NULL;
71 
72 	if (c++ != NULL)
73 		ops->target.addr = strtoull(c, NULL, 16);
74 	else
75 		ops->target.addr = strtoull(ops->raw, NULL, 16);
76 
77 	target.addr = map__objdump_2mem(map, ops->target.addr);
78 	start = map__unmap_ip(map, sym->start);
79 	end = map__unmap_ip(map, sym->end);
80 
81 	ops->target.outside = target.addr < start || target.addr > end;
82 
83 	if (maps__find_ams(ms->maps, &target) == 0 &&
84 	    map__rip_2objdump(target.ms.map, map__map_ip(target.ms.map, target.addr)) == ops->target.addr)
85 		ops->target.sym = target.ms.sym;
86 
87 	if (!ops->target.outside) {
88 		ops->target.offset = target.addr - start;
89 		ops->target.offset_avail = true;
90 	} else {
91 		ops->target.offset_avail = false;
92 	}
93 
94 	return 0;
95 }
96 
97 static struct ins_ops loongarch_jump_ops = {
98 	.parse	   = loongarch_jump__parse,
99 	.scnprintf = jump__scnprintf,
100 };
101 
102 static
loongarch__associate_ins_ops(struct arch * arch,const char * name)103 struct ins_ops *loongarch__associate_ins_ops(struct arch *arch, const char *name)
104 {
105 	struct ins_ops *ops = NULL;
106 
107 	if (!strcmp(name, "bl"))
108 		ops = &loongarch_call_ops;
109 	else if (!strcmp(name, "jirl"))
110 		ops = &ret_ops;
111 	else if (!strcmp(name, "b") ||
112 		 !strncmp(name, "beq", 3) ||
113 		 !strncmp(name, "bne", 3) ||
114 		 !strncmp(name, "blt", 3) ||
115 		 !strncmp(name, "bge", 3) ||
116 		 !strncmp(name, "bltu", 4) ||
117 		 !strncmp(name, "bgeu", 4))
118 		ops = &loongarch_jump_ops;
119 	else
120 		return NULL;
121 
122 	arch__associate_ins_ops(arch, name, ops);
123 
124 	return ops;
125 }
126 
127 static
loongarch__annotate_init(struct arch * arch,char * cpuid __maybe_unused)128 int loongarch__annotate_init(struct arch *arch, char *cpuid __maybe_unused)
129 {
130 	if (!arch->initialized) {
131 		arch->associate_instruction_ops = loongarch__associate_ins_ops;
132 		arch->initialized = true;
133 		arch->objdump.comment_char = '#';
134 	}
135 
136 	return 0;
137 }
138