1 /* $NetBSD: decode.h,v 1.3 2010/02/28 15:52:16 snj Exp $ */ 2 3 /* Contributed to the NetBSD Foundation by Cherry G. Mathew <cherry (at) mahiti.org> 4 * This file contains prototypes to decode unwind descriptors. 5 */ 6 7 #define MAXSTATERECS 20 /* The maximum number of descriptor records per region */ 8 9 #define IS_R1(byte) (( (byte) & 0xc0) == 0) 10 #define IS_R2(byte) (((byte) & 0xf8) == 0x40) 11 #define IS_R3(byte) (((byte) & 0xfc) == 0x60) 12 #define IS_P1(byte) (((byte) & 0xe0) == 0x80) 13 #define IS_P2(byte) (((byte) & 0xf0) == 0xa0) 14 #define IS_P3(byte) (((byte) & 0xf8) == 0xb0) 15 #define IS_P4(byte) ((byte) == (char) 0xb8) 16 #define IS_P5(byte) ((byte) == (char) 0xb9) 17 #define IS_P6(byte) (((byte) & 0xe0) == 0xc0) 18 #define IS_P7(byte) (((byte) & 0xf0) == 0xe0) 19 #define IS_P8(byte) ((byte) == (char) 0xf0) 20 #define IS_P9(byte) ((byte) == (char) 0xf1) 21 #define IS_P10(byte) ((byte) ==(char) 0xff) 22 #define IS_B1(byte) (((byte) & 0xc0) == 0x80) 23 #define IS_B2(byte) (((byte) & 0xe0) == 0xc0) 24 #define IS_B3(byte) ((byte) == (char) 0xe0) 25 #define IS_B4(byte) (((byte) & 0xf7) == 0xf0) 26 #define IS_X1(byte) ((byte) == (char) 0xf9) 27 #define IS_X2(byte) ((byte) == (char) 0xfa) 28 #define IS_X3(byte) ((byte) == (char) 0xfb) 29 #define IS_X4(byte) ((byte) == (char) 0xfc) 30 31 struct unwind_desc_R1 { 32 bool r; 33 vsize_t rlen; 34 }; 35 36 struct unwind_desc_R2 { 37 u_int mask; 38 #define R2MASKRP 0x8 39 #define R2MASKPFS 0x4 40 #define R2MASKPSP 0x2 41 42 u_int grsave; 43 vsize_t rlen; 44 }; 45 46 struct unwind_desc_R3 { 47 bool r; 48 vsize_t rlen; 49 }; 50 51 struct unwind_desc_P1 { 52 u_int brmask; 53 }; 54 55 struct unwind_desc_P2 { 56 u_int brmask; 57 u_int gr; 58 }; 59 60 struct unwind_desc_P3 { 61 u_int r; 62 u_int grbr; 63 }; 64 65 struct unwind_desc_P4 { 66 vsize_t imask; 67 }; 68 69 struct unwind_desc_P5 { 70 u_int grmask; 71 u_int frmask; 72 }; 73 74 struct unwind_desc_P6 { 75 bool r; 76 u_int rmask; 77 }; 78 79 struct unwind_desc_P7 { 80 u_int r; 81 vsize_t t; 82 vsize_t size; 83 }; 84 85 struct unwind_desc_P8 { 86 u_int r; 87 vsize_t t; 88 }; 89 90 struct unwind_desc_P9 { 91 u_int grmask; 92 u_int gr; 93 }; 94 95 struct unwind_desc_P10 { 96 u_int abi; 97 u_int context; 98 }; 99 100 struct unwind_desc_B1 { 101 bool r; 102 u_int label; 103 }; 104 105 struct unwind_desc_B2 { 106 u_int ecount; 107 vsize_t t; 108 }; 109 110 struct unwind_desc_B3 { 111 vsize_t t; 112 vsize_t ecount; 113 }; 114 115 struct unwind_desc_B4 { 116 bool r; 117 vsize_t label; 118 }; 119 120 struct unwind_desc_X1 { 121 bool r; 122 bool a; 123 bool b; 124 u_int reg; 125 vsize_t t; 126 vsize_t offset; 127 }; 128 129 struct unwind_desc_X2 { 130 bool x; 131 bool a; 132 bool b; 133 u_int reg; 134 bool y; 135 u_int treg; 136 vsize_t t; 137 }; 138 139 140 141 struct unwind_desc_X3 { 142 bool r; 143 u_int qp; 144 bool a; 145 bool b; 146 u_int reg; 147 vsize_t t; 148 vsize_t offset; 149 }; 150 151 struct unwind_desc_X4 { 152 u_int qp; 153 bool x; 154 bool a; 155 bool b; 156 u_int reg; 157 bool y; 158 u_int treg; 159 vsize_t t; 160 }; 161 162 union unwind_desc { 163 struct unwind_desc_R1 R1; 164 struct unwind_desc_R2 R2; 165 struct unwind_desc_R3 R3; 166 167 struct unwind_desc_P1 P1; 168 struct unwind_desc_P2 P2; 169 struct unwind_desc_P3 P3; 170 struct unwind_desc_P4 P4; 171 struct unwind_desc_P5 P5; 172 struct unwind_desc_P6 P6; 173 struct unwind_desc_P7 P7; 174 struct unwind_desc_P8 P8; 175 struct unwind_desc_P9 P9; 176 struct unwind_desc_P10 P10; 177 178 struct unwind_desc_B1 B1; 179 struct unwind_desc_B2 B2; 180 struct unwind_desc_B3 B3; 181 struct unwind_desc_B4 B4; 182 183 struct unwind_desc_X1 X1; 184 struct unwind_desc_X2 X2; 185 struct unwind_desc_X3 X3; 186 struct unwind_desc_X4 X4; 187 }; 188 189 enum record_type { 190 R1, R2, R3, 191 P1, P2, P3, P4, P5, P6, P7, P8, P9, P10, 192 B1, B2, B3, B4, 193 X1, X2, X3, X4 194 }; 195 196 197 /* A record chain is a decoded unwind descriptor. 198 * It is useful for post processing unwind descriptors. 199 */ 200 201 struct recordchain { 202 enum record_type type; 203 union unwind_desc udesc; 204 }; 205 206 207 208 /* Decode Function prototypes. */ 209 210 char * 211 unwind_decode_ule128(char *buf, unsigned long *); 212 char * 213 unwind_decode_R1(char *buf, union unwind_desc *uwd); 214 char * 215 unwind_decode_R2(char *buf, union unwind_desc *uwd); 216 char * 217 unwind_decode_R3(char *buf, union unwind_desc *uwd); 218 char * 219 unwind_decode_P1(char *buf, union unwind_desc *uwd); 220 char * 221 unwind_decode_P2(char *buf, union unwind_desc *uwd); 222 char * 223 unwind_decode_P3(char *buf, union unwind_desc *uwd); 224 char * 225 unwind_decode_P4(char *buf, union unwind_desc *uwd, vsize_t len); 226 char * 227 unwind_decode_P5(char *buf, union unwind_desc *uwd); 228 char * 229 unwind_decode_P6(char *buf, union unwind_desc *uwd); 230 char * 231 unwind_decode_P7(char *buf, union unwind_desc *uwd); 232 char * 233 unwind_decode_P8(char *buf, union unwind_desc *uwd); 234 char * 235 unwind_decode_P9(char *buf, union unwind_desc *uwd); 236 char * 237 unwind_decode_P10(char *buf, union unwind_desc *uwd); 238 char * 239 unwind_decode_B1(char *buf, union unwind_desc *uwd); 240 char * 241 unwind_decode_B2(char *buf, union unwind_desc *uwd); 242 char * 243 unwind_decode_B3(char *buf, union unwind_desc *uwd); 244 char * 245 unwind_decode_B4(char *buf, union unwind_desc *uwd); 246 char * 247 unwind_decode_X1(char *buf, union unwind_desc *uwd); 248 char * 249 unwind_decode_X2(char *buf, union unwind_desc *uwd); 250 char * 251 unwind_decode_X3(char *buf, union unwind_desc *uwd); 252 char * 253 unwind_decode_X4(char *buf, union unwind_desc *uwd); 254 255 256 257 258 259 260
Indexes created Sun Sep 21 20:09:37 GMT 2025