| /* libunwind - a platform-independent unwind library |
| Copyright (C) 2003-2004 Hewlett-Packard Co |
| Contributed by David Mosberger-Tang <davidm@hpl.hp.com> |
| Copyright (C) 2010 Konstantin Belousov <kib@freebsd.org> |
| |
| This file is part of libunwind. |
| |
| Permission is hereby granted, free of charge, to any person obtaining |
| a copy of this software and associated documentation files (the |
| "Software"), to deal in the Software without restriction, including |
| without limitation the rights to use, copy, modify, merge, publish, |
| distribute, sublicense, and/or sell copies of the Software, and to |
| permit persons to whom the Software is furnished to do so, subject to |
| the following conditions: |
| |
| The above copyright notice and this permission notice shall be |
| included in all copies or substantial portions of the Software. |
| |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE |
| LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
| OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
| WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ |
| |
| #include "_UPT_internal.h" |
| |
| #if HAVE_DECL_PTRACE_POKEDATA || HAVE_TTRACE |
| int |
| _UPT_access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *val, |
| int write, void *arg) |
| { |
| struct UPT_info *ui = arg; |
| if (!ui) |
| return -UNW_EINVAL; |
| |
| pid_t pid = ui->pid; |
| |
| errno = 0; |
| if (write) |
| { |
| Debug (16, "mem[%lx] <- %lx\n", (long) addr, (long) *val); |
| #ifdef HAVE_TTRACE |
| # warning No support for ttrace() yet. |
| #else |
| /* ANDROID support update. */ |
| ptrace (PTRACE_POKEDATA, pid, (void*) (uintptr_t) addr, (void*) (uintptr_t) *val); |
| /* End of ANDROID update. */ |
| if (errno) |
| return -UNW_EINVAL; |
| #endif |
| } |
| else |
| { |
| #ifdef HAVE_TTRACE |
| # warning No support for ttrace() yet. |
| /* ANDROID support update. */ |
| #elif defined(__mips__) && _MIPS_SIM == _ABIO32 |
| /* The assumption is that sizeof(long) == sizeof(unw_word_t). |
| This isn't true for this mips abi, so it requires two reads to get |
| the entire 64 bit value. */ |
| long reg1, reg2; |
| reg1 = ptrace (PTRACE_PEEKDATA, pid, (void*) (uintptr_t) addr, 0); |
| if (errno) |
| return -UNW_EINVAL; |
| reg2 = ptrace (PTRACE_PEEKDATA, pid, (void*) (uintptr_t) (addr + sizeof(long)), 0); |
| if (errno) |
| return -UNW_EINVAL; |
| *val = ((unw_word_t)(reg2) << 32) | (uint32_t) reg1; |
| #else |
| /* ANDROID support update. */ |
| *val = ptrace (PTRACE_PEEKDATA, pid, (void*) addr, 0); |
| /* End of ANDROID update. */ |
| if (errno) |
| return -UNW_EINVAL; |
| #endif |
| /* End of ANDROID update. */ |
| Debug (16, "mem[%lx] -> %lx\n", (long) addr, (long) *val); |
| } |
| return 0; |
| } |
| #elif HAVE_DECL_PT_IO |
| int |
| _UPT_access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *val, |
| int write, void *arg) |
| { |
| struct UPT_info *ui = arg; |
| if (!ui) |
| return -UNW_EINVAL; |
| pid_t pid = ui->pid; |
| struct ptrace_io_desc iod; |
| |
| iod.piod_offs = (void *)addr; |
| iod.piod_addr = val; |
| iod.piod_len = sizeof(*val); |
| iod.piod_op = write ? PIOD_WRITE_D : PIOD_READ_D; |
| if (write) |
| Debug (16, "mem[%lx] <- %lx\n", (long) addr, (long) *val); |
| if (ptrace(PT_IO, pid, (caddr_t)&iod, 0) == -1) |
| return -UNW_EINVAL; |
| if (!write) |
| Debug (16, "mem[%lx] -> %lx\n", (long) addr, (long) *val); |
| return 0; |
| } |
| #else |
| #error Fix me |
| #endif |