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