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