1/* libunwind - a platform-independent unwind library 2 Copyright (C) 2003 Hewlett-Packard Co 3 Contributed by David Mosberger-Tang <davidm@hpl.hp.com> 4 Copyright (C) 2010 Konstantin Belousov <kib@freebsd.org> 5 6This file is part of libunwind. 7 8Permission is hereby granted, free of charge, to any person obtaining 9a copy of this software and associated documentation files (the 10"Software"), to deal in the Software without restriction, including 11without limitation the rights to use, copy, modify, merge, publish, 12distribute, sublicense, and/or sell copies of the Software, and to 13permit persons to whom the Software is furnished to do so, subject to 14the following conditions: 15 16The above copyright notice and this permission notice shall be 17included in all copies or substantial portions of the Software. 18 19THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 20EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 21MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 22NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 23LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 24OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 25WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ 26 27#include "_UPT_internal.h" 28 29#if HAVE_DECL_PTRACE_POKEUSER || HAVE_TTRACE 30int 31_UPT_access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val, 32 int write, void *arg) 33{ 34 unw_word_t *wp = (unw_word_t *) val; 35 struct UPT_info *ui = arg; 36 pid_t pid = ui->pid; 37 int i; 38 39 if ((unsigned) reg >= ARRAY_SIZE (_UPT_reg_offset)) 40 return -UNW_EBADREG; 41 42 errno = 0; 43 if (write) 44 for (i = 0; i < (int) (sizeof (*val) / sizeof (wp[i])); ++i) 45 { 46#ifdef HAVE_TTRACE 47# warning No support for ttrace() yet. 48#else 49 /* ANDROID support update. */ 50 ptrace (PTRACE_POKEUSER, pid, (void*) (_UPT_reg_offset[reg] + i * sizeof(wp[i])), 51 (void*) wp[i]); 52 /* End of ANDROID update. */ 53#endif 54 if (errno) 55 return -UNW_EBADREG; 56 } 57 else 58 for (i = 0; i < (int) (sizeof (*val) / sizeof (wp[i])); ++i) 59 { 60#ifdef HAVE_TTRACE 61# warning No support for ttrace() yet. 62#else 63 /* ANDROID support update. */ 64 wp[i] = ptrace (PTRACE_PEEKUSER, pid, 65 (void*) (_UPT_reg_offset[reg] + i * sizeof(wp[i])), 0); 66 /* End of ANDROID update. */ 67#endif 68 if (errno) 69 return -UNW_EBADREG; 70 } 71 return 0; 72} 73#elif HAVE_DECL_PT_GETFPREGS 74int 75_UPT_access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val, 76 int write, void *arg) 77{ 78 struct UPT_info *ui = arg; 79 pid_t pid = ui->pid; 80 fpregset_t fpreg; 81 82 if ((unsigned) reg >= ARRAY_SIZE (_UPT_reg_offset)) 83 return -UNW_EBADREG; 84 85 if (ptrace(PT_GETFPREGS, pid, (caddr_t)&fpreg, 0) == -1) 86 return -UNW_EBADREG; 87 if (write) { 88#if defined(__amd64__) 89 memcpy(&fpreg.fpr_xacc[reg], val, sizeof(unw_fpreg_t)); 90#elif defined(__i386__) 91 memcpy(&fpreg.fpr_acc[reg], val, sizeof(unw_fpreg_t)); 92#else 93#error Fix me 94#endif 95 if (ptrace(PT_SETFPREGS, pid, (caddr_t)&fpreg, 0) == -1) 96 return -UNW_EBADREG; 97 } else 98#if defined(__amd64__) 99 memcpy(val, &fpreg.fpr_xacc[reg], sizeof(unw_fpreg_t)); 100#elif defined(__i386__) 101 memcpy(val, &fpreg.fpr_acc[reg], sizeof(unw_fpreg_t)); 102#else 103#error Fix me 104#endif 105 return 0; 106} 107/* ANDROID support update. */ 108#elif defined(__mips__) || defined(__aarch64__) 109int 110_UPT_access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val, 111 int write, void *arg) 112{ 113# pragma message("_UPT_access_fpreg is not implemented and not currently used.") 114 return -UNW_EBADREG; 115} 116/* End of ANDROID update. */ 117#else 118#error Fix me 119#endif 120