18d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala/* libunwind - a platform-independent unwind library 28d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala Copyright (C) 2012 Tommi Rantala <tt.rantala@gmail.com> 38d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 48d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi RantalaThis file is part of libunwind. 58d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 68d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi RantalaPermission is hereby granted, free of charge, to any person obtaining 78d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantalaa copy of this software and associated documentation files (the 88d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala"Software"), to deal in the Software without restriction, including 98d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantalawithout limitation the rights to use, copy, modify, merge, publish, 108d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantaladistribute, sublicense, and/or sell copies of the Software, and to 118d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantalapermit persons to whom the Software is furnished to do so, subject to 128d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantalathe following conditions: 138d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 148d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi RantalaThe above copyright notice and this permission notice shall be 158d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantalaincluded in all copies or substantial portions of the Software. 168d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 178d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi RantalaTHE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 188d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi RantalaEXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 198d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi RantalaMERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 208d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi RantalaNONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 218d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi RantalaLIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 228d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi RantalaOF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 238d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi RantalaWITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ 248d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 258d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala#include "unwind_i.h" 268d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 278d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala/* Disassembly of the Linux VDSO sigreturn functions: 288d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 298d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala00000000 <__kernel_sigreturn>: 308d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 0: 05 93 mov.w e <__kernel_sigreturn+0xe>,r3 ! 77 318d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 2: 10 c3 trapa #16 328d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 4: 0b 20 or r0,r0 338d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 6: 0b 20 or r0,r0 348d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 8: 0b 20 or r0,r0 358d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala a: 0b 20 or r0,r0 368d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala c: 0b 20 or r0,r0 378d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala e: 77 00 .word 0x0077 388d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 10: 09 00 nop 398d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 12: 09 00 nop 408d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 14: 09 00 nop 418d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 16: 09 00 nop 428d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 18: 09 00 nop 438d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 1a: 09 00 nop 448d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 1c: 09 00 nop 458d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 1e: 09 00 nop 468d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 478d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala00000020 <__kernel_rt_sigreturn>: 488d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 20: 05 93 mov.w 2e <__kernel_rt_sigreturn+0xe>,r3 ! ad 498d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 22: 10 c3 trapa #16 508d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 24: 0b 20 or r0,r0 518d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 26: 0b 20 or r0,r0 528d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 28: 0b 20 or r0,r0 538d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 2a: 0b 20 or r0,r0 548d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 2c: 0b 20 or r0,r0 558d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 2e: ad 00 mov.w @(r0,r10),r0 568d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 30: 09 00 nop 578d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 32: 09 00 nop 588d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 34: 09 00 nop 598d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 36: 09 00 nop 608d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 38: 09 00 nop 618d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 3a: 09 00 nop 628d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 3c: 09 00 nop 638d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 3e: 09 00 nop 648d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala*/ 658d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 668d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi RantalaPROTECTED int 678d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantalaunw_is_signal_frame (unw_cursor_t *cursor) 688d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala{ 698d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala#ifdef __linux__ 708d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala struct cursor *c = (struct cursor *) cursor; 718d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala unw_word_t w0, ip; 728d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala unw_addr_space_t as; 738d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala unw_accessors_t *a; 748d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala void *arg; 758d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala int ret; 768d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 778d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala as = c->dwarf.as; 788d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala a = unw_get_accessors (as); 798d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala arg = c->dwarf.as_arg; 808d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 818d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala ip = c->dwarf.ip; 828d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 838d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala ret = (*a->access_mem) (as, ip, &w0, 0, arg); 848d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala if (ret < 0) 858d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala return ret; 868d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 878d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala if (w0 != 0xc3109305) 888d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala return 0; 898d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 908d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala ret = (*a->access_mem) (as, ip+4, &w0, 0, arg); 918d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala if (ret < 0) 928d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala return ret; 938d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 948d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala if (w0 != 0x200b200b) 958d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala return 0; 968d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 978d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala ret = (*a->access_mem) (as, ip+8, &w0, 0, arg); 988d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala if (ret < 0) 998d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala return ret; 1008d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 1018d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala if (w0 != 0x200b200b) 1028d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala return 0; 1038d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 1048d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala ret = (*a->access_mem) (as, ip+12, &w0, 0, arg); 1058d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala if (ret < 0) 1068d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala return ret; 1078d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 1088d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala if (w0 == 0x0077200b) 1098d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala return 1; /* non-RT */ 1108d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala else if (w0 == 0x00ad200b) 1118d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala return 2; /* RT */ 1128d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 1138d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala /* does not look like a signal frame */ 1148d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala return 0; 1158d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala 1168d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala#else 1178d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala return -UNW_ENOINFO; 1188d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala#endif 1198d5b1aeeffb80515197fd7aeee0b3fbfac904ecdTommi Rantala} 120