1 /* libunwind - a platform-independent unwind library 2 Copyright (C) 2001-2004 Hewlett-Packard Co 3 Contributed by David Mosberger-Tang <davidm@hpl.hp.com> 4 Copyright (C) 2013 Linaro Limited 5 6 This file is part of libunwind. 7 8 Permission is hereby granted, free of charge, to any person obtaining 9 a copy of this software and associated documentation files (the 10 "Software"), to deal in the Software without restriction, including 11 without limitation the rights to use, copy, modify, merge, publish, 12 distribute, sublicense, and/or sell copies of the Software, and to 13 permit persons to whom the Software is furnished to do so, subject to 14 the following conditions: 15 16 The above copyright notice and this permission notice shall be 17 included in all copies or substantial portions of the Software. 18 19 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 20 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 21 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 22 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 23 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 24 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 25 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ 26 27 #ifndef LIBUNWIND_H 28 #define LIBUNWIND_H 29 30 #if defined(__cplusplus) || defined(c_plusplus) 31 extern "C" { 32 #endif 33 34 #include <inttypes.h> 35 #include <stddef.h> 36 #include <ucontext.h> 37 #include <stdalign.h> 38 39 #ifndef UNW_EMPTY_STRUCT 40 # ifdef __GNUC__ 41 # define UNW_EMPTY_STRUCT 42 # else 43 # define UNW_EMPTY_STRUCT uint8_t unused; 44 # endif 45 #endif 46 47 #define UNW_TARGET aarch64 48 #define UNW_TARGET_AARCH64 1 49 50 #define _U_TDEP_QP_TRUE 0 /* see libunwind-dynamic.h */ 51 52 /* This needs to be big enough to accommodate "struct cursor", while 53 leaving some slack for future expansion. Changing this value will 54 require recompiling all users of this library. Stack allocation is 55 relatively cheap and unwind-state copying is relatively rare, so we 56 want to err on making it rather too big than too small. 57 58 Calculation is regs used (64 + 34) * 2 + 40 (bytes of rest of 59 cursor) + padding 60 */ 61 62 #define UNW_TDEP_CURSOR_LEN 250 63 64 typedef uint64_t unw_word_t; 65 typedef int64_t unw_sword_t; 66 67 typedef long double unw_tdep_fpreg_t; 68 69 typedef struct 70 { 71 /* no aarch64-specific auxiliary proc-info */ 72 UNW_EMPTY_STRUCT 73 } 74 unw_tdep_proc_info_t; 75 76 typedef enum 77 { 78 /* 64-bit general registers. */ 79 UNW_AARCH64_X0, 80 UNW_AARCH64_X1, 81 UNW_AARCH64_X2, 82 UNW_AARCH64_X3, 83 UNW_AARCH64_X4, 84 UNW_AARCH64_X5, 85 UNW_AARCH64_X6, 86 UNW_AARCH64_X7, 87 UNW_AARCH64_X8, 88 89 /* Temporary registers. */ 90 UNW_AARCH64_X9, 91 UNW_AARCH64_X10, 92 UNW_AARCH64_X11, 93 UNW_AARCH64_X12, 94 UNW_AARCH64_X13, 95 UNW_AARCH64_X14, 96 UNW_AARCH64_X15, 97 98 /* Intra-procedure-call temporary registers. */ 99 UNW_AARCH64_X16, 100 UNW_AARCH64_X17, 101 102 /* Callee-saved registers. */ 103 UNW_AARCH64_X18, 104 UNW_AARCH64_X19, 105 UNW_AARCH64_X20, 106 UNW_AARCH64_X21, 107 UNW_AARCH64_X22, 108 UNW_AARCH64_X23, 109 UNW_AARCH64_X24, 110 UNW_AARCH64_X25, 111 UNW_AARCH64_X26, 112 UNW_AARCH64_X27, 113 UNW_AARCH64_X28, 114 115 /* 64-bit frame pointer. */ 116 UNW_AARCH64_X29, 117 118 /* 64-bit link register. */ 119 UNW_AARCH64_X30, 120 121 /* 64-bit stack pointer. */ 122 UNW_AARCH64_SP = 31, 123 UNW_AARCH64_PC, 124 UNW_AARCH64_PSTATE, 125 126 /* 128-bit FP/Advanced SIMD registers. */ 127 UNW_AARCH64_V0 = 64, 128 UNW_AARCH64_V1, 129 UNW_AARCH64_V2, 130 UNW_AARCH64_V3, 131 UNW_AARCH64_V4, 132 UNW_AARCH64_V5, 133 UNW_AARCH64_V6, 134 UNW_AARCH64_V7, 135 UNW_AARCH64_V8, 136 UNW_AARCH64_V9, 137 UNW_AARCH64_V10, 138 UNW_AARCH64_V11, 139 UNW_AARCH64_V12, 140 UNW_AARCH64_V13, 141 UNW_AARCH64_V14, 142 UNW_AARCH64_V15, 143 UNW_AARCH64_V16, 144 UNW_AARCH64_V17, 145 UNW_AARCH64_V18, 146 UNW_AARCH64_V19, 147 UNW_AARCH64_V20, 148 UNW_AARCH64_V21, 149 UNW_AARCH64_V22, 150 UNW_AARCH64_V23, 151 UNW_AARCH64_V24, 152 UNW_AARCH64_V25, 153 UNW_AARCH64_V26, 154 UNW_AARCH64_V27, 155 UNW_AARCH64_V28, 156 UNW_AARCH64_V29, 157 UNW_AARCH64_V30, 158 UNW_AARCH64_V31, 159 160 UNW_AARCH64_FPSR, 161 UNW_AARCH64_FPCR, 162 163 /* For AArch64, the CFA is the value of SP (x31) at the call site of the 164 previous frame. */ 165 UNW_AARCH64_CFA = UNW_AARCH64_SP, 166 167 UNW_TDEP_LAST_REG = UNW_AARCH64_FPCR, 168 169 UNW_TDEP_IP = UNW_AARCH64_X30, 170 UNW_TDEP_SP = UNW_AARCH64_SP, 171 UNW_TDEP_EH = UNW_AARCH64_X0, 172 173 } 174 aarch64_regnum_t; 175 176 /* Use R0 through R3 to pass exception handling information. */ 177 #define UNW_TDEP_NUM_EH_REGS 4 178 179 typedef struct unw_tdep_save_loc 180 { 181 /* Additional target-dependent info on a save location. */ 182 UNW_EMPTY_STRUCT 183 } 184 unw_tdep_save_loc_t; 185 186 #ifdef __linux__ 187 /* On AArch64, we can directly use ucontext_t as the unwind context, 188 * however, the __reserved struct is quite large: tune it down to only 189 * the necessary used fields. */ 190 191 struct unw_sigcontext 192 { 193 uint64_t fault_address; 194 uint64_t regs[31]; 195 uint64_t sp; 196 uint64_t pc; 197 uint64_t pstate; 198 alignas(16) uint8_t __reserved[(66 * 8)]; 199 }; 200 201 typedef struct 202 { 203 unsigned long uc_flags; 204 struct ucontext *uc_link; 205 stack_t uc_stack; 206 #ifndef __ANDROID__ 207 sigset_t uc_sigmask; 208 #else 209 union { 210 sigset_t uc_sigmask; 211 sigset64_t uc_sigmask64; 212 }; 213 char __padding[128 - sizeof(sigset_t)]; 214 #endif 215 struct unw_sigcontext uc_mcontext; 216 } unw_tdep_context_t; 217 218 typedef struct 219 { 220 uint32_t _ctx_magic; 221 uint32_t _ctx_size; 222 uint32_t fpsr; 223 uint32_t fpcr; 224 uint64_t vregs[64]; 225 } unw_fpsimd_context_t; 226 #else 227 /* On AArch64, we can directly use ucontext_t as the unwind context. */ 228 typedef ucontext_t unw_tdep_context_t; 229 #endif 230 231 232 #include "libunwind-common.h" 233 #include "libunwind-dynamic.h" 234 235 #define unw_tdep_getcontext(uc) ({ \ 236 unw_tdep_context_t *unw_ctx = (uc); \ 237 register uint64_t unw_base __asm__ ("x0") = (uint64_t) unw_ctx->uc_mcontext.regs; \ 238 __asm__ __volatile__ ( \ 239 "stp x0, x1, [%[base], #0]\n" \ 240 "stp x2, x3, [%[base], #16]\n" \ 241 "stp x4, x5, [%[base], #32]\n" \ 242 "stp x6, x7, [%[base], #48]\n" \ 243 "stp x8, x9, [%[base], #64]\n" \ 244 "stp x10, x11, [%[base], #80]\n" \ 245 "stp x12, x13, [%[base], #96]\n" \ 246 "stp x14, x13, [%[base], #112]\n" \ 247 "stp x16, x17, [%[base], #128]\n" \ 248 "stp x18, x19, [%[base], #144]\n" \ 249 "stp x20, x21, [%[base], #160]\n" \ 250 "stp x22, x23, [%[base], #176]\n" \ 251 "stp x24, x25, [%[base], #192]\n" \ 252 "stp x26, x27, [%[base], #208]\n" \ 253 "stp x28, x29, [%[base], #224]\n" \ 254 "mov x1, sp\n" \ 255 "stp x30, x1, [%[base], #240]\n" \ 256 "adr x1, ret%=\n" \ 257 "str x1, [%[base], #256]\n" \ 258 "mov %[base], #0\n" \ 259 "ret%=:\n" \ 260 : [base] "+r" (unw_base) : : "x1", "memory"); \ 261 (int)unw_base; }) 262 #define unw_tdep_is_fpreg UNW_ARCH_OBJ(is_fpreg) 263 264 extern int unw_tdep_is_fpreg (int); 265 266 #if defined(__cplusplus) || defined(c_plusplus) 267 } 268 #endif 269 270 #endif /* LIBUNWIND_H */ 271