1 // SPDX-License-Identifier: GPL-2.0 2 static struct ins_ops *powerpc__associate_instruction_ops(struct arch *arch, const char *name) 3 { 4 int i; 5 struct ins_ops *ops; 6 7 /* 8 * - Interested only if instruction starts with 'b'. 9 * - Few start with 'b', but aren't branch instructions. 10 */ 11 if (name[0] != 'b' || 12 !strncmp(name, "bcd", 3) || 13 !strncmp(name, "brinc", 5) || 14 !strncmp(name, "bper", 4)) 15 return NULL; 16 17 ops = &jump_ops; 18 19 i = strlen(name) - 1; 20 if (i < 0) 21 return NULL; 22 23 /* ignore optional hints at the end of the instructions */ 24 if (name[i] == '+' || name[i] == '-') 25 i--; 26 27 if (name[i] == 'l' || (name[i] == 'a' && name[i-1] == 'l')) { 28 /* 29 * if the instruction ends up with 'l' or 'la', then 30 * those are considered 'calls' since they update LR. 31 * ... except for 'bnl' which is branch if not less than 32 * and the absolute form of the same. 33 */ 34 if (strcmp(name, "bnl") && strcmp(name, "bnl+") && 35 strcmp(name, "bnl-") && strcmp(name, "bnla") && 36 strcmp(name, "bnla+") && strcmp(name, "bnla-")) 37 ops = &call_ops; 38 } 39 if (name[i] == 'r' && name[i-1] == 'l') 40 /* 41 * instructions ending with 'lr' are considered to be 42 * return instructions 43 */ 44 ops = &ret_ops; 45 46 arch__associate_ins_ops(arch, name, ops); 47 return ops; 48 } 49 50 static int powerpc__annotate_init(struct arch *arch) 51 { 52 if (!arch->initialized) { 53 arch->initialized = true; 54 arch->associate_instruction_ops = powerpc__associate_instruction_ops; 55 arch->objdump.comment_char = '#'; 56 } 57 58 return 0; 59 } 60