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 struct ins_ops s390_call_ops = { 49 .parse = s390_call__parse, 50 .scnprintf = call__scnprintf, 51 }; 52 53 static 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 93 out_free_target: 94 zfree(&ops->target.raw); 95 out_free_source: 96 zfree(&ops->source.raw); 97 return -1; 98 } 99 100 101 static struct ins_ops s390_mov_ops = { 102 .parse = s390_mov__parse, 103 .scnprintf = mov__scnprintf, 104 }; 105 106 static 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 } 135 136 static 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 } 156 157 static 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