_UPT_find_proc_info.c revision cc6cc088ba4077f5b6cfa3931a1737b03fc0446e
126465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm/* libunwind - a platform-independent unwind library 226465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm Copyright (C) 2003-2004 Hewlett-Packard Co 326465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm Contributed by David Mosberger-Tang <davidm@hpl.hp.com> 426465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm 526465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidmThis file is part of libunwind. 626465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm 726465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidmPermission is hereby granted, free of charge, to any person obtaining 826465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidma copy of this software and associated documentation files (the 926465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm"Software"), to deal in the Software without restriction, including 1026465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidmwithout limitation the rights to use, copy, modify, merge, publish, 1126465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidmdistribute, sublicense, and/or sell copies of the Software, and to 1226465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidmpermit persons to whom the Software is furnished to do so, subject to 1326465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidmthe following conditions: 1426465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm 1526465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidmThe above copyright notice and this permission notice shall be 1626465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidmincluded in all copies or substantial portions of the Software. 1726465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm 1826465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidmTHE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 1926465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidmEXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 2026465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidmMERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 2126465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidmNONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 2226465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidmLIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 2326465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidmOF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 2426465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidmWITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ 2526465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm 2626465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm#include <elf.h> 2726465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm#include <fcntl.h> 2826465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm#include <string.h> 2926465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm#include <unistd.h> 3026465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm 3126465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm#include <sys/mman.h> 3226465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm 3326465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm#include "_UPT_internal.h" 3426465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm 35b317cb48296ca3837b403782c317f6214a54a7faKen Wernerstatic int 3625ee9f81727616f3269032c52483e4421d451291Arun Sharmaget_unwind_info (struct elf_dyn_info *edi, pid_t pid, unw_addr_space_t as, unw_word_t ip) 3726465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm{ 3826465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm unsigned long segbase, mapoff; 39cc6cc088ba4077f5b6cfa3931a1737b03fc0446eChristopher Ferris#if defined(CONSERVE_STACK) 40cc6cc088ba4077f5b6cfa3931a1737b03fc0446eChristopher Ferris char *path; 41cc6cc088ba4077f5b6cfa3931a1737b03fc0446eChristopher Ferris#else 4226465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm char path[PATH_MAX]; 43cc6cc088ba4077f5b6cfa3931a1737b03fc0446eChristopher Ferris#endif 4426465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm 4526465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm#if UNW_TARGET_IA64 && defined(__linux) 4625ee9f81727616f3269032c52483e4421d451291Arun Sharma if (!edi->ktab.start_ip && _Uia64_get_kernel_table (&edi->ktab) < 0) 47b317cb48296ca3837b403782c317f6214a54a7faKen Werner return -UNW_ENOINFO; 4826465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm 4925ee9f81727616f3269032c52483e4421d451291Arun Sharma if (edi->ktab.format != -1 && ip >= edi->ktab.start_ip && ip < edi->ktab.end_ip) 50b317cb48296ca3837b403782c317f6214a54a7faKen Werner return 0; 5126465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm#endif 5226465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm 5325ee9f81727616f3269032c52483e4421d451291Arun Sharma if ((edi->di_cache.format != -1 5425ee9f81727616f3269032c52483e4421d451291Arun Sharma && ip >= edi->di_cache.start_ip && ip < edi->di_cache.end_ip) 55d83846f120596ea60f74816947deceb93d0a8944Ken Werner#if UNW_TARGET_ARM 5625ee9f81727616f3269032c52483e4421d451291Arun Sharma || (edi->di_debug.format != -1 5725ee9f81727616f3269032c52483e4421d451291Arun Sharma && ip >= edi->di_arm.start_ip && ip < edi->di_arm.end_ip) 58d83846f120596ea60f74816947deceb93d0a8944Ken Werner#endif 5925ee9f81727616f3269032c52483e4421d451291Arun Sharma || (edi->di_debug.format != -1 6025ee9f81727616f3269032c52483e4421d451291Arun Sharma && ip >= edi->di_debug.start_ip && ip < edi->di_debug.end_ip)) 61b317cb48296ca3837b403782c317f6214a54a7faKen Werner return 0; 6226465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm 6325ee9f81727616f3269032c52483e4421d451291Arun Sharma invalidate_edi(edi); 6426465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm 65cc6cc088ba4077f5b6cfa3931a1737b03fc0446eChristopher Ferris#if defined(CONSERVE_STACK) 66cc6cc088ba4077f5b6cfa3931a1737b03fc0446eChristopher Ferris path = (char*)malloc(PATH_MAX); 67cc6cc088ba4077f5b6cfa3931a1737b03fc0446eChristopher Ferris if (path == NULL) 68cc6cc088ba4077f5b6cfa3931a1737b03fc0446eChristopher Ferris return -UNW_ENOMEM; 69cc6cc088ba4077f5b6cfa3931a1737b03fc0446eChristopher Ferris#endif 7025ee9f81727616f3269032c52483e4421d451291Arun Sharma if (tdep_get_elf_image (&edi->ei, pid, ip, &segbase, &mapoff, path, 71cc6cc088ba4077f5b6cfa3931a1737b03fc0446eChristopher Ferris PATH_MAX) < 0) 72cc6cc088ba4077f5b6cfa3931a1737b03fc0446eChristopher Ferris { 73cc6cc088ba4077f5b6cfa3931a1737b03fc0446eChristopher Ferris#if defined(CONSERVE_STACK) 74cc6cc088ba4077f5b6cfa3931a1737b03fc0446eChristopher Ferris free(path); 75cc6cc088ba4077f5b6cfa3931a1737b03fc0446eChristopher Ferris#endif 76cc6cc088ba4077f5b6cfa3931a1737b03fc0446eChristopher Ferris return -UNW_ENOINFO; 77cc6cc088ba4077f5b6cfa3931a1737b03fc0446eChristopher Ferris } 7826465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm 7910a269d6d0b3f5b01688606a72c29cacf098b74amostang.com!davidm /* Here, SEGBASE is the starting-address of the (mmap'ped) segment 8010a269d6d0b3f5b01688606a72c29cacf098b74amostang.com!davidm which covers the IP we're looking for. */ 81d93d96ad833390519ea68a2df22dd55dd26a3214Martin Milata if (tdep_find_unwind_table (edi, as, path, segbase, mapoff, ip) < 0) 82cc6cc088ba4077f5b6cfa3931a1737b03fc0446eChristopher Ferris { 83cc6cc088ba4077f5b6cfa3931a1737b03fc0446eChristopher Ferris#if defined(CONSERVE_STACK) 84cc6cc088ba4077f5b6cfa3931a1737b03fc0446eChristopher Ferris free(path); 85cc6cc088ba4077f5b6cfa3931a1737b03fc0446eChristopher Ferris#endif 86cc6cc088ba4077f5b6cfa3931a1737b03fc0446eChristopher Ferris return -UNW_ENOINFO; 87cc6cc088ba4077f5b6cfa3931a1737b03fc0446eChristopher Ferris } 88cc6cc088ba4077f5b6cfa3931a1737b03fc0446eChristopher Ferris 89cc6cc088ba4077f5b6cfa3931a1737b03fc0446eChristopher Ferris#if defined(CONSERVE_STACK) 90cc6cc088ba4077f5b6cfa3931a1737b03fc0446eChristopher Ferris free(path); 91cc6cc088ba4077f5b6cfa3931a1737b03fc0446eChristopher Ferris#endif 92b317cb48296ca3837b403782c317f6214a54a7faKen Werner 93b317cb48296ca3837b403782c317f6214a54a7faKen Werner /* This can happen in corner cases where dynamically generated 94b317cb48296ca3837b403782c317f6214a54a7faKen Werner code falls into the same page that contains the data-segment 95b317cb48296ca3837b403782c317f6214a54a7faKen Werner and the page-offset of the code is within the first page of 96b317cb48296ca3837b403782c317f6214a54a7faKen Werner the executable. */ 9725ee9f81727616f3269032c52483e4421d451291Arun Sharma if (edi->di_cache.format != -1 9825ee9f81727616f3269032c52483e4421d451291Arun Sharma && (ip < edi->di_cache.start_ip || ip >= edi->di_cache.end_ip)) 9925ee9f81727616f3269032c52483e4421d451291Arun Sharma edi->di_cache.format = -1; 100b317cb48296ca3837b403782c317f6214a54a7faKen Werner 10125ee9f81727616f3269032c52483e4421d451291Arun Sharma if (edi->di_debug.format != -1 10225ee9f81727616f3269032c52483e4421d451291Arun Sharma && (ip < edi->di_debug.start_ip || ip >= edi->di_debug.end_ip)) 10325ee9f81727616f3269032c52483e4421d451291Arun Sharma edi->di_debug.format = -1; 104b317cb48296ca3837b403782c317f6214a54a7faKen Werner 10525ee9f81727616f3269032c52483e4421d451291Arun Sharma if (edi->di_cache.format == -1 106d83846f120596ea60f74816947deceb93d0a8944Ken Werner#if UNW_TARGET_ARM 10725ee9f81727616f3269032c52483e4421d451291Arun Sharma && edi->di_arm.format == -1 108d83846f120596ea60f74816947deceb93d0a8944Ken Werner#endif 10925ee9f81727616f3269032c52483e4421d451291Arun Sharma && edi->di_debug.format == -1) 110b317cb48296ca3837b403782c317f6214a54a7faKen Werner return -UNW_ENOINFO; 11126465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm 112b317cb48296ca3837b403782c317f6214a54a7faKen Werner return 0; 11326465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm} 11426465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm 11526465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidmint 11626465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm_UPT_find_proc_info (unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi, 11726465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm int need_unwind_info, void *arg) 11826465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm{ 11926465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm struct UPT_info *ui = arg; 120b317cb48296ca3837b403782c317f6214a54a7faKen Werner int ret = -UNW_ENOINFO; 12126465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm 12225ee9f81727616f3269032c52483e4421d451291Arun Sharma if (get_unwind_info (&ui->edi, ui->pid, as, ip) < 0) 12326465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm return -UNW_ENOINFO; 12426465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm 12526465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm#if UNW_TARGET_IA64 12625ee9f81727616f3269032c52483e4421d451291Arun Sharma if (ui->edi.ktab.format != -1) 12726465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm { 12826465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm /* The kernel unwind table resides in local memory, so we have 12926465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm to use the local address space to search it. Since 13026465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm _UPT_put_unwind_info() has no easy way of detecting this 13126465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm case, we simply make a copy of the unwind-info, so 13226465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm _UPT_put_unwind_info() can always free() the unwind-info 13326465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm without ill effects. */ 13425ee9f81727616f3269032c52483e4421d451291Arun Sharma ret = tdep_search_unwind_table (unw_local_addr_space, ip, &ui->edi.ktab, pi, 135b317cb48296ca3837b403782c317f6214a54a7faKen Werner need_unwind_info, arg); 1368c94e12429e49bf1db61e75909fd55bffe572404David Mosberger-Tang if (ret >= 0) 13726465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm { 1388c94e12429e49bf1db61e75909fd55bffe572404David Mosberger-Tang if (!need_unwind_info) 1398c94e12429e49bf1db61e75909fd55bffe572404David Mosberger-Tang pi->unwind_info = NULL; 1408c94e12429e49bf1db61e75909fd55bffe572404David Mosberger-Tang else 1418c94e12429e49bf1db61e75909fd55bffe572404David Mosberger-Tang { 1428c94e12429e49bf1db61e75909fd55bffe572404David Mosberger-Tang void *mem = malloc (pi->unwind_info_size); 1438c94e12429e49bf1db61e75909fd55bffe572404David Mosberger-Tang 1448c94e12429e49bf1db61e75909fd55bffe572404David Mosberger-Tang if (!mem) 1458c94e12429e49bf1db61e75909fd55bffe572404David Mosberger-Tang return -UNW_ENOMEM; 1468c94e12429e49bf1db61e75909fd55bffe572404David Mosberger-Tang memcpy (mem, pi->unwind_info, pi->unwind_info_size); 1478c94e12429e49bf1db61e75909fd55bffe572404David Mosberger-Tang pi->unwind_info = mem; 1488c94e12429e49bf1db61e75909fd55bffe572404David Mosberger-Tang } 14926465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm } 15026465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm } 15126465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm#endif 152b317cb48296ca3837b403782c317f6214a54a7faKen Werner 15325ee9f81727616f3269032c52483e4421d451291Arun Sharma if (ret == -UNW_ENOINFO && ui->edi.di_cache.format != -1) 15425ee9f81727616f3269032c52483e4421d451291Arun Sharma ret = tdep_search_unwind_table (as, ip, &ui->edi.di_cache, 155b317cb48296ca3837b403782c317f6214a54a7faKen Werner pi, need_unwind_info, arg); 156b317cb48296ca3837b403782c317f6214a54a7faKen Werner 157d83846f120596ea60f74816947deceb93d0a8944Ken Werner#if UNW_TARGET_ARM 15825ee9f81727616f3269032c52483e4421d451291Arun Sharma if (ret == -UNW_ENOINFO && ui->edi.di_arm.format != -1) 15925ee9f81727616f3269032c52483e4421d451291Arun Sharma ret = tdep_search_unwind_table (as, ip, &ui->edi.di_arm, pi, 160d83846f120596ea60f74816947deceb93d0a8944Ken Werner need_unwind_info, arg); 161d83846f120596ea60f74816947deceb93d0a8944Ken Werner#endif 162d83846f120596ea60f74816947deceb93d0a8944Ken Werner 16325ee9f81727616f3269032c52483e4421d451291Arun Sharma if (ret == -UNW_ENOINFO && ui->edi.di_debug.format != -1) 16425ee9f81727616f3269032c52483e4421d451291Arun Sharma ret = tdep_search_unwind_table (as, ip, &ui->edi.di_debug, pi, 165b317cb48296ca3837b403782c317f6214a54a7faKen Werner need_unwind_info, arg); 166b317cb48296ca3837b403782c317f6214a54a7faKen Werner 167b317cb48296ca3837b403782c317f6214a54a7faKen Werner return ret; 16826465f4a7ddbe7a219e27d6348a91282ad22441dhp.com!davidm} 169