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 .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 (map_groups__find_ams(&target) == 0 && 42 map__rip_2objdump(target.map, map->map_ip(target.map, target.addr)) == ops->target.addr) 43 ops->target.sym = target.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