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3d6f7479b0
tdep_get_func_addr in ppc64 passes NULL for the last argument of as->access_mem. tdep_get_func_addr is called by elf_w(lookup_symbol), which in turn is called by elf_w(get_proc_name_in_image). elf_w(get_proc_name_in_image) is part of the API, and is only passed an unw_addr_space_t, not a unw_cursor_t, meaning that we cannot recover the UPT_info on the PPC64 platform. This could be fixed by giving libunwind the knowledge to perform relocations itself, thus not needing to look at the running image to determine function addresses.
91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
/* 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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ptrace (PTRACE_POKEDATA, pid, addr, *val);
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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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#else
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*val = ptrace (PTRACE_PEEKDATA, pid, addr, 0);
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if (errno)
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return -UNW_EINVAL;
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#endif
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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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