1 /* libunwind - a platform-independent unwind library 2 Copyright (C) 2003-2004 Hewlett-Packard Co 3 Contributed by David Mosberger-Tang <davidm (at) hpl.hp.com> 4 Copyright (C) 2010 Konstantin Belousov <kib (at) freebsd.org> 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 #include "_UPT_internal.h" 28 29 #if HAVE_DECL_PTRACE_POKEDATA || HAVE_TTRACE 30 int 31 _UPT_access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *val, 32 int write, void *arg) 33 { 34 struct UPT_info *ui = arg; 35 if (!ui) 36 return -UNW_EINVAL; 37 38 pid_t pid = ui->pid; 39 40 errno = 0; 41 if (write) 42 { 43 Debug (16, "mem[%lx] <- %lx\n", (long) addr, (long) *val); 44 #ifdef HAVE_TTRACE 45 # warning No support for ttrace() yet. 46 #else 47 /* ANDROID support update. */ 48 ptrace (PTRACE_POKEDATA, pid, (void*) (uintptr_t) addr, (void*) (uintptr_t) *val); 49 /* End of ANDROID update. */ 50 if (errno) 51 return -UNW_EINVAL; 52 #endif 53 } 54 else 55 { 56 #ifdef HAVE_TTRACE 57 # warning No support for ttrace() yet. 58 /* ANDROID support update. */ 59 #elif defined(__mips__) && _MIPS_SIM == _ABIO32 60 /* The assumption is that sizeof(long) == sizeof(unw_word_t). 61 This isn't true for this mips abi, so it requires two reads to get 62 the entire 64 bit value. */ 63 long reg1, reg2; 64 reg1 = ptrace (PTRACE_PEEKDATA, pid, (void*) (uintptr_t) addr, 0); 65 if (errno) 66 return -UNW_EINVAL; 67 reg2 = ptrace (PTRACE_PEEKDATA, pid, (void*) (uintptr_t) (addr + sizeof(long)), 0); 68 if (errno) 69 return -UNW_EINVAL; 70 *val = ((unw_word_t)(reg2) << 32) | (uint32_t) reg1; 71 #else 72 /* ANDROID support update. */ 73 *val = ptrace (PTRACE_PEEKDATA, pid, (void*) addr, 0); 74 /* End of ANDROID update. */ 75 if (errno) 76 return -UNW_EINVAL; 77 #endif 78 /* End of ANDROID update. */ 79 Debug (16, "mem[%lx] -> %lx\n", (long) addr, (long) *val); 80 } 81 return 0; 82 } 83 #elif HAVE_DECL_PT_IO 84 int 85 _UPT_access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *val, 86 int write, void *arg) 87 { 88 struct UPT_info *ui = arg; 89 if (!ui) 90 return -UNW_EINVAL; 91 pid_t pid = ui->pid; 92 struct ptrace_io_desc iod; 93 94 iod.piod_offs = (void *)addr; 95 iod.piod_addr = val; 96 iod.piod_len = sizeof(*val); 97 iod.piod_op = write ? PIOD_WRITE_D : PIOD_READ_D; 98 if (write) 99 Debug (16, "mem[%lx] <- %lx\n", (long) addr, (long) *val); 100 if (ptrace(PT_IO, pid, (caddr_t)&iod, 0) == -1) 101 return -UNW_EINVAL; 102 if (!write) 103 Debug (16, "mem[%lx] -> %lx\n", (long) addr, (long) *val); 104 return 0; 105 } 106 #else 107 #error Fix me 108 #endif 109
