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 #define UNW_TDEP_CURSOR_LEN 4096 50 51 typedef uint64_t unw_word_t; 52 typedef int64_t unw_sword_t; 53 54 typedef long double unw_tdep_fpreg_t; 55 56 typedef struct 57 { 58 /* no aarch64-specific auxiliary proc-info */ 59 /* ANDROID support update. */ 60 char __reserved; 61 /* End of ANDROID update. */ 62 } 63 unw_tdep_proc_info_t; 64 65 typedef enum 66 { 67 /* 64-bit general registers. */ 68 UNW_AARCH64_X0, 69 UNW_AARCH64_X1, 70 UNW_AARCH64_X2, 71 UNW_AARCH64_X3, 72 UNW_AARCH64_X4, 73 UNW_AARCH64_X5, 74 UNW_AARCH64_X6, 75 UNW_AARCH64_X7, 76 UNW_AARCH64_X8, 77 78 /* Temporary registers. */ 79 UNW_AARCH64_X9, 80 UNW_AARCH64_X10, 81 UNW_AARCH64_X11, 82 UNW_AARCH64_X12, 83 UNW_AARCH64_X13, 84 UNW_AARCH64_X14, 85 UNW_AARCH64_X15, 86 87 /* Intra-procedure-call temporary registers. */ 88 UNW_AARCH64_X16, 89 UNW_AARCH64_X17, 90 91 /* Callee-saved registers. */ 92 UNW_AARCH64_X18, 93 UNW_AARCH64_X19, 94 UNW_AARCH64_X20, 95 UNW_AARCH64_X21, 96 UNW_AARCH64_X22, 97 UNW_AARCH64_X23, 98 UNW_AARCH64_X24, 99 UNW_AARCH64_X25, 100 UNW_AARCH64_X26, 101 UNW_AARCH64_X27, 102 UNW_AARCH64_X28, 103 104 /* 64-bit frame pointer. */ 105 UNW_AARCH64_X29, 106 107 /* 64-bit link register. */ 108 UNW_AARCH64_X30, 109 110 /* 64-bit stack pointer. */ 111 UNW_AARCH64_SP = 31, 112 UNW_AARCH64_PC, 113 UNW_AARCH64_PSTATE, 114 115 /* 128-bit FP/Advanced SIMD registers. */ 116 UNW_AARCH64_V0 = 64, 117 UNW_AARCH64_V1, 118 UNW_AARCH64_V2, 119 UNW_AARCH64_V3, 120 UNW_AARCH64_V4, 121 UNW_AARCH64_V5, 122 UNW_AARCH64_V6, 123 UNW_AARCH64_V7, 124 UNW_AARCH64_V8, 125 UNW_AARCH64_V9, 126 UNW_AARCH64_V10, 127 UNW_AARCH64_V11, 128 UNW_AARCH64_V12, 129 UNW_AARCH64_V13, 130 UNW_AARCH64_V14, 131 UNW_AARCH64_V15, 132 UNW_AARCH64_V16, 133 UNW_AARCH64_V17, 134 UNW_AARCH64_V18, 135 UNW_AARCH64_V19, 136 UNW_AARCH64_V20, 137 UNW_AARCH64_V21, 138 UNW_AARCH64_V22, 139 UNW_AARCH64_V23, 140 UNW_AARCH64_V24, 141 UNW_AARCH64_V25, 142 UNW_AARCH64_V26, 143 UNW_AARCH64_V27, 144 UNW_AARCH64_V28, 145 UNW_AARCH64_V29, 146 UNW_AARCH64_V30, 147 UNW_AARCH64_V31, 148 149 UNW_AARCH64_FPSR, 150 UNW_AARCH64_FPCR, 151 152 /* For AArch64, the CFA is the value of SP (x31) at the call site of the 153 previous frame. */ 154 UNW_AARCH64_CFA = UNW_AARCH64_SP, 155 156 UNW_TDEP_LAST_REG = UNW_AARCH64_FPCR, 157 158 UNW_TDEP_IP = UNW_AARCH64_X30, 159 UNW_TDEP_SP = UNW_AARCH64_SP, 160 UNW_TDEP_EH = UNW_AARCH64_X0, 161 162 } 163 aarch64_regnum_t; 164 165 /* Use R0 through R3 to pass exception handling information. */ 166 #define UNW_TDEP_NUM_EH_REGS 4 167 168 typedef struct unw_tdep_save_loc 169 { 170 /* Additional target-dependent info on a save location. */ 171 /* ANDROID support update. */ 172 char __reserved; 173 /* End of ANDROID update. */ 174 } 175 unw_tdep_save_loc_t; 176 177 178 /* On AArch64, we can directly use ucontext_t as the unwind context. */ 179 typedef ucontext_t unw_tdep_context_t; 180 181 #include "libunwind-common.h" 182 #include "libunwind-dynamic.h" 183 184 /* ANDROID support update. */ 185 /* There is no getcontext in Android. */ 186 #define unw_tdep_getcontext(uc) (({ \ 187 unw_tdep_context_t *unw_ctx = (uc); \ 188 register uint64_t *unw_base asm ("x0") = (uint64_t*) unw_ctx->uc_mcontext.regs; \ 189 __asm__ __volatile__ ( \ 190 "1:\n" \ 191 "stp x0, x1, [%[base], #0]\n" \ 192 "stp x2, x3, [%[base], #16]\n" \ 193 "stp x4, x5, [%[base], #32]\n" \ 194 "stp x6, x7, [%[base], #48]\n" \ 195 "stp x8, x9, [%[base], #64]\n" \ 196 "stp x10, x11, [%[base], #80]\n" \ 197 "stp x12, x13, [%[base], #96]\n" \ 198 "stp x14, x15, [%[base], #112]\n" \ 199 "stp x16, x17, [%[base], #128]\n" \ 200 "stp x18, x19, [%[base], #144]\n" \ 201 "stp x20, x21, [%[base], #160]\n" \ 202 "stp x22, x23, [%[base], #176]\n" \ 203 "stp x24, x25, [%[base], #192]\n" \ 204 "stp x26, x27, [%[base], #208]\n" \ 205 "stp x28, x29, [%[base], #224]\n" \ 206 "str x30, [%[base], #240]\n" \ 207 "mov x1, sp\n" \ 208 "adr x2, 1b\n" \ 209 "stp x1, x2, [%[base], #248]\n" \ 210 : [base] "+r" (unw_base) : : "x1", "x2", "memory"); \ 211 }), 0) 212 /* End of ANDROID update. */ 213 #define unw_tdep_is_fpreg UNW_ARCH_OBJ(is_fpreg) 214 215 extern int unw_tdep_is_fpreg (int); 216 217 #if defined(__cplusplus) || defined(c_plusplus) 218 } 219 #endif 220 221 #endif /* LIBUNWIND_H */ 222