1 /* libunwind - a platform-independent unwind library 2 Copyright (C) 2006-2007 IBM 3 Contributed by 4 Corey Ashford <cjashfor@us.ibm.com> 5 Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com> 6 7 Copied from libunwind-x86_64.h, modified slightly for building 8 frysk successfully on ppc64, by Wu Zhou <woodzltc@cn.ibm.com> 9 Will be replaced when libunwind is ready on ppc64 platform. 10 11 This file is part of libunwind. 12 13 Permission is hereby granted, free of charge, to any person obtaining 14 a copy of this software and associated documentation files (the 15 "Software"), to deal in the Software without restriction, including 16 without limitation the rights to use, copy, modify, merge, publish, 17 distribute, sublicense, and/or sell copies of the Software, and to 18 permit persons to whom the Software is furnished to do so, subject to 19 the following conditions: 20 21 The above copyright notice and this permission notice shall be 22 included in all copies or substantial portions of the Software. 23 24 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 28 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 29 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 30 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ 31 32 #ifndef LIBUNWIND_H 33 #define LIBUNWIND_H 34 35 #if defined(__cplusplus) || defined(c_plusplus) 36 extern "C" { 37 #endif 38 39 #include <inttypes.h> 40 #include <ucontext.h> 41 42 #define UNW_TARGET ppc64 43 #define UNW_TARGET_PPC64 1 44 45 #define _U_TDEP_QP_TRUE 0 /* see libunwind-dynamic.h */ 46 47 /* 48 * This needs to be big enough to accommodate "struct cursor", while 49 * leaving some slack for future expansion. Changing this value will 50 * require recompiling all users of this library. Stack allocation is 51 * relatively cheap and unwind-state copying is relatively rare, so we want 52 * to err on making it rather too big than too small. 53 * 54 * To simplify this whole process, we are at least initially taking the 55 * tack that UNW_PPC64_* map straight across to the .eh_frame column register 56 * numbers. These register numbers come from gcc's source in 57 * gcc/config/rs6000/rs6000.h 58 * 59 * UNW_TDEP_CURSOR_LEN is in terms of unw_word_t size. Since we have 115 60 * elements in the loc array, each sized 2 * unw_word_t, plus the rest of 61 * the cursor struct, this puts us at about 2 * 115 + 40 = 270. Let's 62 * round that up to 280. 63 */ 64 65 #define UNW_TDEP_CURSOR_LEN 280 66 67 #if __WORDSIZE==32 68 typedef uint32_t unw_word_t; 69 typedef int32_t unw_sword_t; 70 #else 71 typedef uint64_t unw_word_t; 72 typedef int64_t unw_sword_t; 73 #endif 74 75 typedef long double unw_tdep_fpreg_t; 76 77 /* 78 * Vector register (in PowerPC64 used for AltiVec registers) 79 */ 80 typedef struct { 81 uint64_t halves[2]; 82 } unw_tdep_vreg_t; 83 84 typedef enum 85 { 86 UNW_PPC64_R0, 87 UNW_PPC64_R1, /* called STACK_POINTER in gcc */ 88 UNW_PPC64_R2, 89 UNW_PPC64_R3, 90 UNW_PPC64_R4, 91 UNW_PPC64_R5, 92 UNW_PPC64_R6, 93 UNW_PPC64_R7, 94 UNW_PPC64_R8, 95 UNW_PPC64_R9, 96 UNW_PPC64_R10, 97 UNW_PPC64_R11, /* called STATIC_CHAIN in gcc */ 98 UNW_PPC64_R12, 99 UNW_PPC64_R13, 100 UNW_PPC64_R14, 101 UNW_PPC64_R15, 102 UNW_PPC64_R16, 103 UNW_PPC64_R17, 104 UNW_PPC64_R18, 105 UNW_PPC64_R19, 106 UNW_PPC64_R20, 107 UNW_PPC64_R21, 108 UNW_PPC64_R22, 109 UNW_PPC64_R23, 110 UNW_PPC64_R24, 111 UNW_PPC64_R25, 112 UNW_PPC64_R26, 113 UNW_PPC64_R27, 114 UNW_PPC64_R28, 115 UNW_PPC64_R29, 116 UNW_PPC64_R30, 117 UNW_PPC64_R31, /* called HARD_FRAME_POINTER in gcc */ 118 119 UNW_PPC64_F0 = 32, 120 UNW_PPC64_F1, 121 UNW_PPC64_F2, 122 UNW_PPC64_F3, 123 UNW_PPC64_F4, 124 UNW_PPC64_F5, 125 UNW_PPC64_F6, 126 UNW_PPC64_F7, 127 UNW_PPC64_F8, 128 UNW_PPC64_F9, 129 UNW_PPC64_F10, 130 UNW_PPC64_F11, 131 UNW_PPC64_F12, 132 UNW_PPC64_F13, 133 UNW_PPC64_F14, 134 UNW_PPC64_F15, 135 UNW_PPC64_F16, 136 UNW_PPC64_F17, 137 UNW_PPC64_F18, 138 UNW_PPC64_F19, 139 UNW_PPC64_F20, 140 UNW_PPC64_F21, 141 UNW_PPC64_F22, 142 UNW_PPC64_F23, 143 UNW_PPC64_F24, 144 UNW_PPC64_F25, 145 UNW_PPC64_F26, 146 UNW_PPC64_F27, 147 UNW_PPC64_F28, 148 UNW_PPC64_F29, 149 UNW_PPC64_F30, 150 UNW_PPC64_F31, 151 /* Note that there doesn't appear to be an .eh_frame register column 152 for the FPSCR register. I don't know why this is. Since .eh_frame 153 info is what this implementation uses for unwinding, we have no way 154 to unwind this register, and so we will not expose an FPSCR register 155 number in the libunwind API. 156 */ 157 158 UNW_PPC64_LR = 65, 159 UNW_PPC64_CTR = 66, 160 UNW_PPC64_ARG_POINTER = 67, 161 162 UNW_PPC64_CR0 = 68, 163 UNW_PPC64_CR1, 164 UNW_PPC64_CR2, 165 UNW_PPC64_CR3, 166 UNW_PPC64_CR4, 167 /* CR5 .. CR7 are currently unused */ 168 UNW_PPC64_CR5, 169 UNW_PPC64_CR6, 170 UNW_PPC64_CR7, 171 172 UNW_PPC64_XER = 76, 173 174 UNW_PPC64_V0 = 77, 175 UNW_PPC64_V1, 176 UNW_PPC64_V2, 177 UNW_PPC64_V3, 178 UNW_PPC64_V4, 179 UNW_PPC64_V5, 180 UNW_PPC64_V6, 181 UNW_PPC64_V7, 182 UNW_PPC64_V8, 183 UNW_PPC64_V9, 184 UNW_PPC64_V10, 185 UNW_PPC64_V11, 186 UNW_PPC64_V12, 187 UNW_PPC64_V13, 188 UNW_PPC64_V14, 189 UNW_PPC64_V15, 190 UNW_PPC64_V16, 191 UNW_PPC64_V17, 192 UNW_PPC64_V18, 193 UNW_PPC64_V19, 194 UNW_PPC64_V20, 195 UNW_PPC64_V21, 196 UNW_PPC64_V22, 197 UNW_PPC64_V23, 198 UNW_PPC64_V24, 199 UNW_PPC64_V25, 200 UNW_PPC64_V26, 201 UNW_PPC64_V27, 202 UNW_PPC64_V28, 203 UNW_PPC64_V29, 204 UNW_PPC64_V30, 205 UNW_PPC64_V31, 206 207 UNW_PPC64_VRSAVE = 109, 208 UNW_PPC64_VSCR = 110, 209 UNW_PPC64_SPE_ACC = 111, 210 UNW_PPC64_SPEFSCR = 112, 211 212 /* frame info (read-only) */ 213 UNW_PPC64_FRAME_POINTER, 214 UNW_PPC64_NIP, 215 216 217 UNW_TDEP_LAST_REG = UNW_PPC64_NIP, 218 219 UNW_TDEP_IP = UNW_PPC64_NIP, 220 UNW_TDEP_SP = UNW_PPC64_R1, 221 UNW_TDEP_EH = UNW_PPC64_R12 222 } 223 ppc64_regnum_t; 224 225 /* 226 * According to David Edelsohn, GNU gcc uses R3, R4, R5, and maybe R6 for 227 * passing parameters to exception handlers. 228 */ 229 230 #define UNW_TDEP_NUM_EH_REGS 4 231 232 typedef struct unw_tdep_save_loc 233 { 234 /* Additional target-dependent info on a save location. */ 235 /* ANDROID support update. */ 236 char __reserved; 237 /* End of ANDROID update. */ 238 } 239 unw_tdep_save_loc_t; 240 241 /* On ppc64, we can directly use ucontext_t as the unwind context. */ 242 typedef ucontext_t unw_tdep_context_t; 243 244 /* XXX this is not ideal: an application should not be prevented from 245 using the "getcontext" name just because it's using libunwind. We 246 can't just use __getcontext() either, because that isn't exported 247 by glibc... */ 248 #define unw_tdep_getcontext(uc) (getcontext (uc), 0) 249 250 #include "libunwind-dynamic.h" 251 252 typedef struct 253 { 254 /* no ppc64-specific auxiliary proc-info */ 255 /* ANDROID support update. */ 256 char __reserved; 257 /* End of ANDROID update. */ 258 } 259 unw_tdep_proc_info_t; 260 261 #include "libunwind-common.h" 262 263 #define unw_tdep_is_fpreg UNW_ARCH_OBJ(is_fpreg) 264 extern int unw_tdep_is_fpreg (int); 265 266 #if defined(__cplusplus) || defined(c_plusplus) 267 } 268 #endif 269 270 #endif /* LIBUNWIND_H */ 271