1/* libunwind - a platform-independent unwind library 2 Copyright (C) 2002-2005 Hewlett-Packard Co 3 Contributed by David Mosberger-Tang <davidm@hpl.hp.com> 4 5This file is part of libunwind. 6 7Permission is hereby granted, free of charge, to any person obtaining 8a copy of this software and associated documentation files (the 9"Software"), to deal in the Software without restriction, including 10without limitation the rights to use, copy, modify, merge, publish, 11distribute, sublicense, and/or sell copies of the Software, and to 12permit persons to whom the Software is furnished to do so, subject to 13the following conditions: 14 15The above copyright notice and this permission notice shall be 16included in all copies or substantial portions of the Software. 17 18THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 19EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 21NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 22LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 23OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 24WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ 25 26/* Logically, we like to think of the stack as a contiguous region of 27memory. Unfortunately, this logical view doesn't work for the 28register backing store, because the RSE is an asynchronous engine and 29because UNIX/Linux allow for stack-switching via sigaltstack(2). 30Specifically, this means that any given stacked register may or may 31not be backed up by memory in the current stack. If not, then the 32backing memory may be found in any of the "more inner" (younger) 33stacks. The routines in this file help manage the discontiguous 34nature of the register backing store. The routines are completely 35independent of UNIX/Linux, but each stack frame that switches the 36backing store is expected to reserve 4 words for use by libunwind. For 37example, in the Linux sigcontext, sc_fr[0] and sc_fr[1] serve this 38purpose. */ 39 40#include "libunwind_i.h" 41 42/* Maintain the register names as a single string to keep the number 43 of dynamic relocations in the shared object to a minimum. */ 44 45#define regname_len 9 46#define regname_str \ 47 "r0\0\0\0\0\0\0\0r1\0\0\0\0\0\0\0r2\0\0\0\0\0\0\0r3\0\0\0\0\0\0\0" \ 48 "r4\0\0\0\0\0\0\0r5\0\0\0\0\0\0\0r6\0\0\0\0\0\0\0r7\0\0\0\0\0\0\0" \ 49 "r8\0\0\0\0\0\0\0r9\0\0\0\0\0\0\0r10\0\0\0\0\0\0r11\0\0\0\0\0\0" \ 50 "r12\0\0\0\0\0\0r13\0\0\0\0\0\0r14\0\0\0\0\0\0r15\0\0\0\0\0\0" \ 51 "r16\0\0\0\0\0\0r17\0\0\0\0\0\0r18\0\0\0\0\0\0r19\0\0\0\0\0\0" \ 52 "r20\0\0\0\0\0\0r21\0\0\0\0\0\0r22\0\0\0\0\0\0r23\0\0\0\0\0\0" \ 53 "r24\0\0\0\0\0\0r25\0\0\0\0\0\0r26\0\0\0\0\0\0r27\0\0\0\0\0\0" \ 54 "r28\0\0\0\0\0\0r29\0\0\0\0\0\0r30\0\0\0\0\0\0r31\0\0\0\0\0\0" \ 55 "r32\0\0\0\0\0\0r33\0\0\0\0\0\0r34\0\0\0\0\0\0r35\0\0\0\0\0\0" \ 56 "r36\0\0\0\0\0\0r37\0\0\0\0\0\0r38\0\0\0\0\0\0r39\0\0\0\0\0\0" \ 57 "r40\0\0\0\0\0\0r41\0\0\0\0\0\0r42\0\0\0\0\0\0r43\0\0\0\0\0\0" \ 58 "r44\0\0\0\0\0\0r45\0\0\0\0\0\0r46\0\0\0\0\0\0r47\0\0\0\0\0\0" \ 59 "r48\0\0\0\0\0\0r49\0\0\0\0\0\0r50\0\0\0\0\0\0r51\0\0\0\0\0\0" \ 60 "r52\0\0\0\0\0\0r53\0\0\0\0\0\0r54\0\0\0\0\0\0r55\0\0\0\0\0\0" \ 61 "r56\0\0\0\0\0\0r57\0\0\0\0\0\0r58\0\0\0\0\0\0r59\0\0\0\0\0\0" \ 62 "r60\0\0\0\0\0\0r61\0\0\0\0\0\0r62\0\0\0\0\0\0r63\0\0\0\0\0\0" \ 63 "r64\0\0\0\0\0\0r65\0\0\0\0\0\0r66\0\0\0\0\0\0r67\0\0\0\0\0\0" \ 64 "r68\0\0\0\0\0\0r69\0\0\0\0\0\0r70\0\0\0\0\0\0r71\0\0\0\0\0\0" \ 65 "r72\0\0\0\0\0\0r73\0\0\0\0\0\0r74\0\0\0\0\0\0r75\0\0\0\0\0\0" \ 66 "r76\0\0\0\0\0\0r77\0\0\0\0\0\0r78\0\0\0\0\0\0r79\0\0\0\0\0\0" \ 67 "r80\0\0\0\0\0\0r81\0\0\0\0\0\0r82\0\0\0\0\0\0r83\0\0\0\0\0\0" \ 68 "r84\0\0\0\0\0\0r85\0\0\0\0\0\0r86\0\0\0\0\0\0r87\0\0\0\0\0\0" \ 69 "r88\0\0\0\0\0\0r89\0\0\0\0\0\0r90\0\0\0\0\0\0r91\0\0\0\0\0\0" \ 70 "r92\0\0\0\0\0\0r93\0\0\0\0\0\0r94\0\0\0\0\0\0r95\0\0\0\0\0\0" \ 71 "r96\0\0\0\0\0\0r97\0\0\0\0\0\0r98\0\0\0\0\0\0r99\0\0\0\0\0\0" \ 72 "r100\0\0\0\0\0r101\0\0\0\0\0r102\0\0\0\0\0r103\0\0\0\0\0" \ 73 "r104\0\0\0\0\0r105\0\0\0\0\0r106\0\0\0\0\0r107\0\0\0\0\0" \ 74 "r108\0\0\0\0\0r109\0\0\0\0\0r110\0\0\0\0\0r111\0\0\0\0\0" \ 75 "r112\0\0\0\0\0r113\0\0\0\0\0r114\0\0\0\0\0r115\0\0\0\0\0" \ 76 "r116\0\0\0\0\0r117\0\0\0\0\0r118\0\0\0\0\0r119\0\0\0\0\0" \ 77 "r120\0\0\0\0\0r121\0\0\0\0\0r122\0\0\0\0\0r123\0\0\0\0\0" \ 78 "r124\0\0\0\0\0r125\0\0\0\0\0r126\0\0\0\0\0r127\0\0\0\0\0" \ 79 "nat0\0\0\0\0\0nat1\0\0\0\0\0nat2\0\0\0\0\0nat3\0\0\0\0\0" \ 80 "nat4\0\0\0\0\0nat5\0\0\0\0\0nat6\0\0\0\0\0nat7\0\0\0\0\0" \ 81 "nat8\0\0\0\0\0nat9\0\0\0\0\0nat10\0\0\0\0nat11\0\0\0\0" \ 82 "nat12\0\0\0\0nat13\0\0\0\0nat14\0\0\0\0nat15\0\0\0\0" \ 83 "nat16\0\0\0\0nat17\0\0\0\0nat18\0\0\0\0nat19\0\0\0\0" \ 84 "nat20\0\0\0\0nat21\0\0\0\0nat22\0\0\0\0nat23\0\0\0\0" \ 85 "nat24\0\0\0\0nat25\0\0\0\0nat26\0\0\0\0nat27\0\0\0\0" \ 86 "nat28\0\0\0\0nat29\0\0\0\0nat30\0\0\0\0nat31\0\0\0\0" \ 87 "nat32\0\0\0\0nat33\0\0\0\0nat34\0\0\0\0nat35\0\0\0\0" \ 88 "nat36\0\0\0\0nat37\0\0\0\0nat38\0\0\0\0nat39\0\0\0\0" \ 89 "nat40\0\0\0\0nat41\0\0\0\0nat42\0\0\0\0nat43\0\0\0\0" \ 90 "nat44\0\0\0\0nat45\0\0\0\0nat46\0\0\0\0nat47\0\0\0\0" \ 91 "nat48\0\0\0\0nat49\0\0\0\0nat50\0\0\0\0nat51\0\0\0\0" \ 92 "nat52\0\0\0\0nat53\0\0\0\0nat54\0\0\0\0nat55\0\0\0\0" \ 93 "nat56\0\0\0\0nat57\0\0\0\0nat58\0\0\0\0nat59\0\0\0\0" \ 94 "nat60\0\0\0\0nat61\0\0\0\0nat62\0\0\0\0nat63\0\0\0\0" \ 95 "nat64\0\0\0\0nat65\0\0\0\0nat66\0\0\0\0nat67\0\0\0\0" \ 96 "nat68\0\0\0\0nat69\0\0\0\0nat70\0\0\0\0nat71\0\0\0\0" \ 97 "nat72\0\0\0\0nat73\0\0\0\0nat74\0\0\0\0nat75\0\0\0\0" \ 98 "nat76\0\0\0\0nat77\0\0\0\0nat78\0\0\0\0nat79\0\0\0\0" \ 99 "nat80\0\0\0\0nat81\0\0\0\0nat82\0\0\0\0nat83\0\0\0\0" \ 100 "nat84\0\0\0\0nat85\0\0\0\0nat86\0\0\0\0nat87\0\0\0\0" \ 101 "nat88\0\0\0\0nat89\0\0\0\0nat90\0\0\0\0nat91\0\0\0\0" \ 102 "nat92\0\0\0\0nat93\0\0\0\0nat94\0\0\0\0nat95\0\0\0\0" \ 103 "nat96\0\0\0\0nat97\0\0\0\0nat98\0\0\0\0nat99\0\0\0\0" \ 104 "nat100\0\0\0nat101\0\0\0nat102\0\0\0nat103\0\0\0" \ 105 "nat104\0\0\0nat105\0\0\0nat106\0\0\0nat107\0\0\0" \ 106 "nat108\0\0\0nat109\0\0\0nat110\0\0\0nat111\0\0\0" \ 107 "nat112\0\0\0nat113\0\0\0nat114\0\0\0nat115\0\0\0" \ 108 "nat116\0\0\0nat117\0\0\0nat118\0\0\0nat119\0\0\0" \ 109 "nat120\0\0\0nat121\0\0\0nat122\0\0\0nat123\0\0\0" \ 110 "nat124\0\0\0nat125\0\0\0nat126\0\0\0nat127\0\0\0" \ 111 "f0\0\0\0\0\0\0\0f1\0\0\0\0\0\0\0f2\0\0\0\0\0\0\0f3\0\0\0\0\0\0\0" \ 112 "f4\0\0\0\0\0\0\0f5\0\0\0\0\0\0\0f6\0\0\0\0\0\0\0f7\0\0\0\0\0\0\0" \ 113 "f8\0\0\0\0\0\0\0f9\0\0\0\0\0\0\0f10\0\0\0\0\0\0f11\0\0\0\0\0\0" \ 114 "f12\0\0\0\0\0\0f13\0\0\0\0\0\0f14\0\0\0\0\0\0f15\0\0\0\0\0\0" \ 115 "f16\0\0\0\0\0\0f17\0\0\0\0\0\0f18\0\0\0\0\0\0f19\0\0\0\0\0\0" \ 116 "f20\0\0\0\0\0\0f21\0\0\0\0\0\0f22\0\0\0\0\0\0f23\0\0\0\0\0\0" \ 117 "f24\0\0\0\0\0\0f25\0\0\0\0\0\0f26\0\0\0\0\0\0f27\0\0\0\0\0\0" \ 118 "f28\0\0\0\0\0\0f29\0\0\0\0\0\0f30\0\0\0\0\0\0f31\0\0\0\0\0\0" \ 119 "f32\0\0\0\0\0\0f33\0\0\0\0\0\0f34\0\0\0\0\0\0f35\0\0\0\0\0\0" \ 120 "f36\0\0\0\0\0\0f37\0\0\0\0\0\0f38\0\0\0\0\0\0f39\0\0\0\0\0\0" \ 121 "f40\0\0\0\0\0\0f41\0\0\0\0\0\0f42\0\0\0\0\0\0f43\0\0\0\0\0\0" \ 122 "f44\0\0\0\0\0\0f45\0\0\0\0\0\0f46\0\0\0\0\0\0f47\0\0\0\0\0\0" \ 123 "f48\0\0\0\0\0\0f49\0\0\0\0\0\0f50\0\0\0\0\0\0f51\0\0\0\0\0\0" \ 124 "f52\0\0\0\0\0\0f53\0\0\0\0\0\0f54\0\0\0\0\0\0f55\0\0\0\0\0\0" \ 125 "f56\0\0\0\0\0\0f57\0\0\0\0\0\0f58\0\0\0\0\0\0f59\0\0\0\0\0\0" \ 126 "f60\0\0\0\0\0\0f61\0\0\0\0\0\0f62\0\0\0\0\0\0f63\0\0\0\0\0\0" \ 127 "f64\0\0\0\0\0\0f65\0\0\0\0\0\0f66\0\0\0\0\0\0f67\0\0\0\0\0\0" \ 128 "f68\0\0\0\0\0\0f69\0\0\0\0\0\0f70\0\0\0\0\0\0f71\0\0\0\0\0\0" \ 129 "f72\0\0\0\0\0\0f73\0\0\0\0\0\0f74\0\0\0\0\0\0f75\0\0\0\0\0\0" \ 130 "f76\0\0\0\0\0\0f77\0\0\0\0\0\0f78\0\0\0\0\0\0f79\0\0\0\0\0\0" \ 131 "f80\0\0\0\0\0\0f81\0\0\0\0\0\0f82\0\0\0\0\0\0f83\0\0\0\0\0\0" \ 132 "f84\0\0\0\0\0\0f85\0\0\0\0\0\0f86\0\0\0\0\0\0f87\0\0\0\0\0\0" \ 133 "f88\0\0\0\0\0\0f89\0\0\0\0\0\0f90\0\0\0\0\0\0f91\0\0\0\0\0\0" \ 134 "f92\0\0\0\0\0\0f93\0\0\0\0\0\0f94\0\0\0\0\0\0f95\0\0\0\0\0\0" \ 135 "f96\0\0\0\0\0\0f97\0\0\0\0\0\0f98\0\0\0\0\0\0f99\0\0\0\0\0\0" \ 136 "f100\0\0\0\0\0f101\0\0\0\0\0f102\0\0\0\0\0f103\0\0\0\0\0" \ 137 "f104\0\0\0\0\0f105\0\0\0\0\0f106\0\0\0\0\0f107\0\0\0\0\0" \ 138 "f108\0\0\0\0\0f109\0\0\0\0\0f110\0\0\0\0\0f111\0\0\0\0\0" \ 139 "f112\0\0\0\0\0f113\0\0\0\0\0f114\0\0\0\0\0f115\0\0\0\0\0" \ 140 "f116\0\0\0\0\0f117\0\0\0\0\0f118\0\0\0\0\0f119\0\0\0\0\0" \ 141 "f120\0\0\0\0\0f121\0\0\0\0\0f122\0\0\0\0\0f123\0\0\0\0\0" \ 142 "f124\0\0\0\0\0f125\0\0\0\0\0f126\0\0\0\0\0f127\0\0\0\0\0" \ 143 "ar0\0\0\0\0\0\0ar1\0\0\0\0\0\0ar2\0\0\0\0\0\0ar3\0\0\0\0\0\0" \ 144 "ar4\0\0\0\0\0\0ar5\0\0\0\0\0\0ar6\0\0\0\0\0\0ar7\0\0\0\0\0\0" \ 145 "ar8\0\0\0\0\0\0ar9\0\0\0\0\0\0ar10\0\0\0\0\0ar11\0\0\0\0\0" \ 146 "ar12\0\0\0\0\0ar13\0\0\0\0\0ar14\0\0\0\0\0ar15\0\0\0\0\0" \ 147 "rsc\0\0\0\0\0\0bsp\0\0\0\0\0\0bspstore\0rnat\0\0\0\0\0" \ 148 "ar20\0\0\0\0\0ar21\0\0\0\0\0ar22\0\0\0\0\0ar23\0\0\0\0\0" \ 149 "ar24\0\0\0\0\0ar25\0\0\0\0\0ar26\0\0\0\0\0ar27\0\0\0\0\0" \ 150 "ar28\0\0\0\0\0ar29\0\0\0\0\0ar30\0\0\0\0\0ar31\0\0\0\0\0" \ 151 "ccv\0\0\0\0\0\0ar33\0\0\0\0\0ar34\0\0\0\0\0ar35\0\0\0\0\0" \ 152 "unat\0\0\0\0\0ar37\0\0\0\0\0ar38\0\0\0\0\0ar39\0\0\0\0\0" \ 153 "fpsr\0\0\0\0\0ar41\0\0\0\0\0ar42\0\0\0\0\0ar43\0\0\0\0\0" \ 154 "ar44\0\0\0\0\0ar45\0\0\0\0\0ar46\0\0\0\0\0ar47\0\0\0\0\0" \ 155 "ar48\0\0\0\0\0ar49\0\0\0\0\0ar50\0\0\0\0\0ar51\0\0\0\0\0" \ 156 "ar52\0\0\0\0\0ar53\0\0\0\0\0ar54\0\0\0\0\0ar55\0\0\0\0\0" \ 157 "ar56\0\0\0\0\0ar57\0\0\0\0\0ar58\0\0\0\0\0ar59\0\0\0\0\0" \ 158 "ar60\0\0\0\0\0ar61\0\0\0\0\0ar62\0\0\0\0\0ar63\0\0\0\0\0" \ 159 "pfs\0\0\0\0\0\0lc\0\0\0\0\0\0\0ec\0\0\0\0\0\0\0ar67\0\0\0\0\0" \ 160 "ar68\0\0\0\0\0ar69\0\0\0\0\0ar70\0\0\0\0\0ar71\0\0\0\0\0" \ 161 "ar72\0\0\0\0\0ar73\0\0\0\0\0ar74\0\0\0\0\0ar75\0\0\0\0\0" \ 162 "ar76\0\0\0\0\0ar77\0\0\0\0\0ar78\0\0\0\0\0ar79\0\0\0\0\0" \ 163 "ar80\0\0\0\0\0ar81\0\0\0\0\0ar82\0\0\0\0\0ar83\0\0\0\0\0" \ 164 "ar84\0\0\0\0\0ar85\0\0\0\0\0ar86\0\0\0\0\0ar87\0\0\0\0\0" \ 165 "ar88\0\0\0\0\0ar89\0\0\0\0\0ar90\0\0\0\0\0ar91\0\0\0\0\0" \ 166 "ar92\0\0\0\0\0ar93\0\0\0\0\0ar94\0\0\0\0\0ar95\0\0\0\0\0" \ 167 "ar96\0\0\0\0\0ar97\0\0\0\0\0ar98\0\0\0\0\0ar99\0\0\0\0\0" \ 168 "ar100\0\0\0\0ar101\0\0\0\0ar102\0\0\0\0ar103\0\0\0\0" \ 169 "ar104\0\0\0\0ar105\0\0\0\0ar106\0\0\0\0ar107\0\0\0\0" \ 170 "ar108\0\0\0\0ar109\0\0\0\0ar110\0\0\0\0ar111\0\0\0\0" \ 171 "ar112\0\0\0\0ar113\0\0\0\0ar114\0\0\0\0ar115\0\0\0\0" \ 172 "ar116\0\0\0\0ar117\0\0\0\0ar118\0\0\0\0ar119\0\0\0\0" \ 173 "ar120\0\0\0\0ar121\0\0\0\0ar122\0\0\0\0ar123\0\0\0\0" \ 174 "ar124\0\0\0\0ar125\0\0\0\0ar126\0\0\0\0ar127\0\0\0\0" \ 175 "rp\0\0\0\0\0\0\0b1\0\0\0\0\0\0\0b2\0\0\0\0\0\0\0b3\0\0\0\0\0\0\0" \ 176 "b4\0\0\0\0\0\0\0b5\0\0\0\0\0\0\0b6\0\0\0\0\0\0\0b7\0\0\0\0\0\0\0" \ 177 "pr\0\0\0\0\0\0\0cfm\0\0\0\0\0\0bsp\0\0\0\0\0\0ip\0\0\0\0\0\0\0" \ 178 "sp\0\0\0\0\0\0\0" 179 180#define NREGS ((int) (sizeof (regname_str) - 1) / regname_len) 181 182PROTECTED const char * 183unw_regname (unw_regnum_t reg) 184{ 185 if (reg < NREGS) 186 return regname_str + reg * regname_len; 187 else 188 return "???"; 189} 190