xref: /linux/tools/perf/util/annotate-arch/annotate-loongarch.c (revision bf4afc53b77aeaa48b5409da5c8da6bb4eff7f43)
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Perf annotate functions.
4  *
5  * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
6  */
7 #include <stdlib.h>
8 #include <string.h>
9 #include <linux/compiler.h>
10 #include <linux/zalloc.h>
11 #include "../disasm.h"
12 #include "../map.h"
13 #include "../maps.h"
14 #include "../symbol.h"
15 #include "../thread.h"
16 
17 static int loongarch_call__parse(const struct arch *arch, struct ins_operands *ops,
18 				 struct map_symbol *ms,
19 				 struct disasm_line *dl __maybe_unused)
20 {
21 	char *c, *endptr, *tok, *name;
22 	struct map *map = ms->map;
23 	struct addr_map_symbol target;
24 
25 	c = strchr(ops->raw, '#');
26 	if (c++ == NULL)
27 		return -1;
28 
29 	ops->target.addr = strtoull(c, &endptr, 16);
30 
31 	name = strchr(endptr, '<');
32 	name++;
33 
34 	if (arch->objdump.skip_functions_char &&
35 	    strchr(name, arch->objdump.skip_functions_char))
36 		return -1;
37 
38 	tok = strchr(name, '>');
39 	if (tok == NULL)
40 		return -1;
41 
42 	*tok = '\0';
43 	ops->target.name = strdup(name);
44 	*tok = '>';
45 
46 	if (ops->target.name == NULL)
47 		return -1;
48 
49 	target = (struct addr_map_symbol) {
50 		.ms = { .map = map__get(map), },
51 		.addr = map__objdump_2mem(map, ops->target.addr),
52 	};
53 
54 	if (maps__find_ams(thread__maps(ms->thread), &target) == 0 &&
55 	    map__rip_2objdump(target.ms.map, map__map_ip(target.ms.map, target.addr)) == ops->target.addr)
56 		ops->target.sym = target.ms.sym;
57 
58 	addr_map_symbol__exit(&target);
59 	return 0;
60 }
61 
62 static const struct ins_ops loongarch_call_ops = {
63 	.parse	   = loongarch_call__parse,
64 	.scnprintf = call__scnprintf,
65 	.is_call   = true,
66 };
67 
68 static int loongarch_jump__parse(const struct arch *arch, struct ins_operands *ops,
69 				 struct map_symbol *ms,
70 				 struct disasm_line *dl __maybe_unused)
71 
72 {
73 	struct map *map = ms->map;
74 	struct symbol *sym = ms->sym;
75 	struct addr_map_symbol target = {
76 		.ms = { .map = map__get(map), },
77 	};
78 	const char *c = strchr(ops->raw, '#');
79 	u64 start, end;
80 
81 	ops->jump.raw_comment = strchr(ops->raw, arch->objdump.comment_char);
82 	ops->jump.raw_func_start = strchr(ops->raw, '<');
83 
84 	if (ops->jump.raw_func_start && c > ops->jump.raw_func_start)
85 		c = NULL;
86 
87 	if (c++ != NULL)
88 		ops->target.addr = strtoull(c, NULL, 16);
89 	else
90 		ops->target.addr = strtoull(ops->raw, NULL, 16);
91 
92 	target.addr = map__objdump_2mem(map, ops->target.addr);
93 	start = map__unmap_ip(map, sym->start);
94 	end = map__unmap_ip(map, sym->end);
95 
96 	ops->target.outside = target.addr < start || target.addr > end;
97 
98 	if (maps__find_ams(thread__maps(ms->thread), &target) == 0 &&
99 	    map__rip_2objdump(target.ms.map, map__map_ip(target.ms.map, target.addr)) == ops->target.addr)
100 		ops->target.sym = target.ms.sym;
101 
102 	if (!ops->target.outside) {
103 		ops->target.offset = target.addr - start;
104 		ops->target.offset_avail = true;
105 	} else {
106 		ops->target.offset_avail = false;
107 	}
108 	addr_map_symbol__exit(&target);
109 	return 0;
110 }
111 
112 static const struct ins_ops loongarch_jump_ops = {
113 	.parse	   = loongarch_jump__parse,
114 	.scnprintf = jump__scnprintf,
115 	.is_jump   = true,
116 };
117 
118 static
119 const struct ins_ops *loongarch__associate_ins_ops(struct arch *arch, const char *name)
120 {
121 	const struct ins_ops *ops = NULL;
122 
123 	if (!strcmp(name, "bl"))
124 		ops = &loongarch_call_ops;
125 	else if (!strcmp(name, "jirl"))
126 		ops = &ret_ops;
127 	else if (!strcmp(name, "b") ||
128 		 !strncmp(name, "beq", 3) ||
129 		 !strncmp(name, "bne", 3) ||
130 		 !strncmp(name, "blt", 3) ||
131 		 !strncmp(name, "bge", 3) ||
132 		 !strncmp(name, "bltu", 4) ||
133 		 !strncmp(name, "bgeu", 4))
134 		ops = &loongarch_jump_ops;
135 	else
136 		return NULL;
137 
138 	arch__associate_ins_ops(arch, name, ops);
139 
140 	return ops;
141 }
142 
143 const struct arch *arch__new_loongarch(const struct e_machine_and_e_flags *id,
144 				       const char *cpuid __maybe_unused)
145 {
146 	struct arch *arch = zalloc(sizeof(*arch));
147 
148 	if (!arch)
149 		return NULL;
150 
151 	arch->name = "loongarch";
152 	arch->id = *id;
153 	arch->associate_instruction_ops = loongarch__associate_ins_ops;
154 	arch->objdump.comment_char = '#';
155 	return arch;
156 }
157