sys/arch/ia64/unwind/decode.h

   1 /*      $NetBSD: decode.h,v 1.1 2006/04/07 14:21:37 cherry Exp $        */
   2
   3 /* Contributed to the NetBSD Foundation by Cherry G. Mathew <cherry@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 usefull 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
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