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