1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/compiler.h>
3 
4 static int s390_call__parse(struct arch *arch, struct ins_operands *ops,
5 			    struct map_symbol *ms)
6 {
7 	char *endptr, *tok, *name;
8 	struct map *map = ms->map;
9 	struct addr_map_symbol target = {
10 		.ms = { .map = map, },
11 	};
12 
13 	tok = strchr(ops->raw, ',');
14 	if (!tok)
15 		return -1;
16 
17 	ops->target.addr = strtoull(tok + 1, &endptr, 16);
18 
19 	name = strchr(endptr, '<');
20 	if (name == NULL)
21 		return -1;
22 
23 	name++;
24 
25 	if (arch->objdump.skip_functions_char &&
26 	    strchr(name, arch->objdump.skip_functions_char))
27 		return -1;
28 
29 	tok = strchr(name, '>');
30 	if (tok == NULL)
31 		return -1;
32 
33 	*tok = '\0';
34 	ops->target.name = strdup(name);
35 	*tok = '>';
36 
37 	if (ops->target.name == NULL)
38 		return -1;
39 	target.addr = map__objdump_2mem(map, ops->target.addr);
40 
41 	if (maps__find_ams(ms->maps, &target) == 0 &&
42 	    map__rip_2objdump(target.ms.map, map__map_ip(target.ms.map, target.addr)) == ops->target.addr)
43 		ops->target.sym = target.ms.sym;
44 
45 	return 0;
46 }
47 
48 static int call__scnprintf(struct ins *ins, char *bf, size_t size,
49 			   struct ins_operands *ops, int max_ins_name);
50 
51 static struct ins_ops s390_call_ops = {
52 	.parse	   = s390_call__parse,
53 	.scnprintf = call__scnprintf,
54 };
55 
56 static int s390_mov__parse(struct arch *arch __maybe_unused,
57 			   struct ins_operands *ops,
58 			   struct map_symbol *ms __maybe_unused)
59 {
60 	char *s = strchr(ops->raw, ','), *target, *endptr;
61 
62 	if (s == NULL)
63 		return -1;
64 
65 	*s = '\0';
66 	ops->source.raw = strdup(ops->raw);
67 	*s = ',';
68 
69 	if (ops->source.raw == NULL)
70 		return -1;
71 
72 	target = ++s;
73 	ops->target.raw = strdup(target);
74 	if (ops->target.raw == NULL)
75 		goto out_free_source;
76 
77 	ops->target.addr = strtoull(target, &endptr, 16);
78 	if (endptr == target)
79 		goto out_free_target;
80 
81 	s = strchr(endptr, '<');
82 	if (s == NULL)
83 		goto out_free_target;
84 	endptr = strchr(s + 1, '>');
85 	if (endptr == NULL)
86 		goto out_free_target;
87 
88 	*endptr = '\0';
89 	ops->target.name = strdup(s + 1);
90 	*endptr = '>';
91 	if (ops->target.name == NULL)
92 		goto out_free_target;
93 
94 	return 0;
95 
96 out_free_target:
97 	zfree(&ops->target.raw);
98 out_free_source:
99 	zfree(&ops->source.raw);
100 	return -1;
101 }
102 
103 
104 static struct ins_ops s390_mov_ops = {
105 	.parse	   = s390_mov__parse,
106 	.scnprintf = mov__scnprintf,
107 };
108 
109 static struct ins_ops *s390__associate_ins_ops(struct arch *arch, const char *name)
110 {
111 	struct ins_ops *ops = NULL;
112 
113 	/* catch all kind of jumps */
114 	if (strchr(name, 'j') ||
115 	    !strncmp(name, "bct", 3) ||
116 	    !strncmp(name, "br", 2))
117 		ops = &jump_ops;
118 	/* override call/returns */
119 	if (!strcmp(name, "bras") ||
120 	    !strcmp(name, "brasl") ||
121 	    !strcmp(name, "basr"))
122 		ops = &s390_call_ops;
123 	if (!strcmp(name, "br"))
124 		ops = &ret_ops;
125 	/* override load/store relative to PC */
126 	if (!strcmp(name, "lrl") ||
127 	    !strcmp(name, "lgrl") ||
128 	    !strcmp(name, "lgfrl") ||
129 	    !strcmp(name, "llgfrl") ||
130 	    !strcmp(name, "strl") ||
131 	    !strcmp(name, "stgrl"))
132 		ops = &s390_mov_ops;
133 
134 	if (ops)
135 		arch__associate_ins_ops(arch, name, ops);
136 	return ops;
137 }
138 
139 static int s390__cpuid_parse(struct arch *arch, char *cpuid)
140 {
141 	unsigned int family;
142 	char model[16], model_c[16], cpumf_v[16], cpumf_a[16];
143 	int ret;
144 
145 	/*
146 	 * cpuid string format:
147 	 * "IBM,family,model-capacity,model[,cpum_cf-version,cpum_cf-authorization]"
148 	 */
149 	ret = sscanf(cpuid, "%*[^,],%u,%[^,],%[^,],%[^,],%s", &family, model_c,
150 		     model, cpumf_v, cpumf_a);
151 	if (ret >= 2) {
152 		arch->family = family;
153 		arch->model = 0;
154 		return 0;
155 	}
156 
157 	return -1;
158 }
159 
160 static int s390__annotate_init(struct arch *arch, char *cpuid __maybe_unused)
161 {
162 	int err = 0;
163 
164 	if (!arch->initialized) {
165 		arch->initialized = true;
166 		arch->associate_instruction_ops = s390__associate_ins_ops;
167 		if (cpuid) {
168 			if (s390__cpuid_parse(arch, cpuid))
169 				err = SYMBOL_ANNOTATE_ERRNO__ARCH_INIT_CPUID_PARSING;
170 		}
171 	}
172 
173 	return err;
174 }
175