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 38 #define UNW_TARGET aarch64 39 #define UNW_TARGET_AARCH64 1 40 41 #define _U_TDEP_QP_TRUE 0 /* see libunwind-dynamic.h */ 42 43 /* This needs to be big enough to accommodate "struct cursor", while 44 leaving some slack for future expansion. Changing this value will 45 require recompiling all users of this library. Stack allocation is 46 relatively cheap and unwind-state copying is relatively rare, so we 47 want to err on making it rather too big than too small. 48 49 Calculation is regs used (64 + 34) * 2 + 40 (bytes of rest of 50 cursor) + padding 51 */ 52 53 #define UNW_TDEP_CURSOR_LEN 250 54 55 typedef uint64_t unw_word_t; 56 typedef int64_t unw_sword_t; 57 58 typedef long double unw_tdep_fpreg_t; 59 60 typedef struct 61 { 62 /* no aarch64-specific auxiliary proc-info */ 63 } 64 unw_tdep_proc_info_t; 65 66 typedef enum 67 { 68 /* 64-bit general registers. */ 69 UNW_AARCH64_X0, 70 UNW_AARCH64_X1, 71 UNW_AARCH64_X2, 72 UNW_AARCH64_X3, 73 UNW_AARCH64_X4, 74 UNW_AARCH64_X5, 75 UNW_AARCH64_X6, 76 UNW_AARCH64_X7, 77 UNW_AARCH64_X8, 78 79 /* Temporary registers. */ 80 UNW_AARCH64_X9, 81 UNW_AARCH64_X10, 82 UNW_AARCH64_X11, 83 UNW_AARCH64_X12, 84 UNW_AARCH64_X13, 85 UNW_AARCH64_X14, 86 UNW_AARCH64_X15, 87 88 /* Intra-procedure-call temporary registers. */ 89 UNW_AARCH64_X16, 90 UNW_AARCH64_X17, 91 92 /* Callee-saved registers. */ 93 UNW_AARCH64_X18, 94 UNW_AARCH64_X19, 95 UNW_AARCH64_X20, 96 UNW_AARCH64_X21, 97 UNW_AARCH64_X22, 98 UNW_AARCH64_X23, 99 UNW_AARCH64_X24, 100 UNW_AARCH64_X25, 101 UNW_AARCH64_X26, 102 UNW_AARCH64_X27, 103 UNW_AARCH64_X28, 104 105 /* 64-bit frame pointer. */ 106 UNW_AARCH64_X29, 107 108 /* 64-bit link register. */ 109 UNW_AARCH64_X30, 110 111 /* 64-bit stack pointer. */ 112 UNW_AARCH64_SP = 31, 113 UNW_AARCH64_PC, 114 UNW_AARCH64_PSTATE, 115 116 /* 128-bit FP/Advanced SIMD registers. */ 117 UNW_AARCH64_V0 = 64, 118 UNW_AARCH64_V1, 119 UNW_AARCH64_V2, 120 UNW_AARCH64_V3, 121 UNW_AARCH64_V4, 122 UNW_AARCH64_V5, 123 UNW_AARCH64_V6, 124 UNW_AARCH64_V7, 125 UNW_AARCH64_V8, 126 UNW_AARCH64_V9, 127 UNW_AARCH64_V10, 128 UNW_AARCH64_V11, 129 UNW_AARCH64_V12, 130 UNW_AARCH64_V13, 131 UNW_AARCH64_V14, 132 UNW_AARCH64_V15, 133 UNW_AARCH64_V16, 134 UNW_AARCH64_V17, 135 UNW_AARCH64_V18, 136 UNW_AARCH64_V19, 137 UNW_AARCH64_V20, 138 UNW_AARCH64_V21, 139 UNW_AARCH64_V22, 140 UNW_AARCH64_V23, 141 UNW_AARCH64_V24, 142 UNW_AARCH64_V25, 143 UNW_AARCH64_V26, 144 UNW_AARCH64_V27, 145 UNW_AARCH64_V28, 146 UNW_AARCH64_V29, 147 UNW_AARCH64_V30, 148 UNW_AARCH64_V31, 149 150 UNW_AARCH64_FPSR, 151 UNW_AARCH64_FPCR, 152 153 /* For AArch64, the CFA is the value of SP (x31) at the call site of the 154 previous frame. */ 155 UNW_AARCH64_CFA = UNW_AARCH64_SP, 156 157 UNW_TDEP_LAST_REG = UNW_AARCH64_FPCR, 158 159 UNW_TDEP_IP = UNW_AARCH64_X30, 160 UNW_TDEP_SP = UNW_AARCH64_SP, 161 UNW_TDEP_EH = UNW_AARCH64_X0, 162 163 } 164 aarch64_regnum_t; 165 166 /* Use R0 through R3 to pass exception handling information. */ 167 #define UNW_TDEP_NUM_EH_REGS 4 168 169 typedef struct unw_tdep_save_loc 170 { 171 /* Additional target-dependent info on a save location. */ 172 } 173 unw_tdep_save_loc_t; 174 175 176 /* On AArch64, we can directly use ucontext_t as the unwind context, 177 * however, the __reserved struct is quite large: tune it down to only 178 * the necessary used fields. */ 179 180 struct unw_sigcontext 181 { 182 uint64_t fault_address; 183 uint64_t regs[31]; 184 uint64_t sp; 185 uint64_t pc; 186 uint64_t pstate; 187 uint8_t __reserved[(34 * 8)] __attribute__((__aligned__(16))); 188 }; 189 190 typedef struct 191 { 192 unsigned long uc_flags; 193 struct ucontext *uc_link; 194 stack_t uc_stack; 195 sigset_t uc_sigmask; 196 struct unw_sigcontext uc_mcontext; 197 } unw_tdep_context_t; 198 199 typedef struct 200 { 201 uint32_t _ctx_magic; 202 uint32_t _ctx_size; 203 uint32_t fpsr; 204 uint32_t fpcr; 205 uint64_t vregs[64]; 206 } unw_fpsimd_context_t; 207 208 209 210 #include "libunwind-common.h" 211 #include "libunwind-dynamic.h" 212 213 #define unw_tdep_getcontext(uc) (({ \ 214 unw_tdep_context_t *unw_ctx = (uc); \ 215 register uint64_t *unw_base __asm__ ("x0") = (uint64_t*) unw_ctx->uc_mcontext.regs; \ 216 __asm__ __volatile__ ( \ 217 "stp x0, x1, [%[base], #0]\n" \ 218 "stp x2, x3, [%[base], #16]\n" \ 219 "stp x4, x5, [%[base], #32]\n" \ 220 "stp x6, x7, [%[base], #48]\n" \ 221 "stp x8, x9, [%[base], #64]\n" \ 222 "stp x10, x11, [%[base], #80]\n" \ 223 "stp x12, x13, [%[base], #96]\n" \ 224 "stp x14, x13, [%[base], #112]\n" \ 225 "stp x16, x17, [%[base], #128]\n" \ 226 "stp x18, x19, [%[base], #144]\n" \ 227 "stp x20, x21, [%[base], #160]\n" \ 228 "stp x22, x23, [%[base], #176]\n" \ 229 "stp x24, x25, [%[base], #192]\n" \ 230 "stp x26, x27, [%[base], #208]\n" \ 231 "stp x28, x29, [%[base], #224]\n" \ 232 "str x30, [%[base], #240]\n" \ 233 "mov x1, sp\n" \ 234 "stp x1, x30, [%[base], #248]\n" \ 235 : [base] "+r" (unw_base) : : "x1", "memory"); \ 236 }), 0) 237 #define unw_tdep_is_fpreg UNW_ARCH_OBJ(is_fpreg) 238 239 extern int unw_tdep_is_fpreg (int); 240 241 #if defined(__cplusplus) || defined(c_plusplus) 242 } 243 #endif 244 245 #endif /* LIBUNWIND_H */ 246