/* libunwind - a platform-independent unwind library Copyright (C) 2002, 2004 Hewlett-Packard Co Copyright (C) 2007 David Mosberger-Tang Contributed by David Mosberger-Tang <dmosberger@gmail.com> 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 <stdlib.h> #include <string.h> #include "unwind_i.h" #ifdef UNW_REMOTE_ONLY /* unw_local_addr_space is a NULL pointer in this case. */ PROTECTED unw_addr_space_t unw_local_addr_space; #else /* !UNW_REMOTE_ONLY */ static struct unw_addr_space local_addr_space; PROTECTED unw_addr_space_t unw_local_addr_space = &local_addr_space; static inline void * uc_addr (ucontext_t *uc, int reg) { void *addr; if ((unsigned) (reg - UNW_HPPA_GR) < 32) addr = &uc->uc_mcontext.sc_gr[reg - UNW_HPPA_GR]; else if ((unsigned) (reg - UNW_HPPA_FR) < 32) addr = &uc->uc_mcontext.sc_fr[reg - UNW_HPPA_FR]; else addr = NULL; return addr; } # ifdef UNW_LOCAL_ONLY void * _Uhppa_uc_addr (ucontext_t *uc, int reg) { return uc_addr (uc, reg); } # endif /* UNW_LOCAL_ONLY */ HIDDEN unw_dyn_info_list_t _U_dyn_info_list; /* XXX fix me: there is currently no way to locate the dyn-info list by a remote unwinder. On ia64, this is done via a special unwind-table entry. Perhaps something similar can be done with DWARF2 unwind info. */ static void put_unwind_info (unw_addr_space_t as, unw_proc_info_t *proc_info, void *arg) { /* it's a no-op */ } static int get_dyn_info_list_addr (unw_addr_space_t as, unw_word_t *dyn_info_list_addr, void *arg) { *dyn_info_list_addr = (unw_word_t) &_U_dyn_info_list; return 0; } static int access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *val, int write, void *arg) { if (write) { /* ANDROID support update. */ #ifdef UNW_LOCAL_ONLY if (maps_is_writable(as->map_list, addr)) { #endif Debug (12, "mem[%x] <- %x\n", addr, *val); *(unw_word_t *) addr = *val; #ifdef UNW_LOCAL_ONLY } else { Debug (12, "Unwritable memory mem[%x] <- %x\n", addr, *val); return -1; } #endif /* End of ANDROID update. */ } else { /* ANDROID support update. */ #ifdef UNW_LOCAL_ONLY if (maps_is_readable(as->map_list, addr)) { #endif *val = *(unw_word_t *) addr; Debug (12, "mem[%x] -> %x\n", addr, *val); #ifdef UNW_LOCAL_ONLY } else { Debug (12, "Unreadable memory mem[%x] -> XXX\n", addr); return -1; } #endif /* End of ANDROID update. */ } return 0; } static int access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val, int write, void *arg) { unw_word_t *addr; ucontext_t *uc = arg; if ((unsigned int) (reg - UNW_HPPA_FR) < 32) goto badreg; addr = uc_addr (uc, reg); if (!addr) goto badreg; if (write) { *(unw_word_t *) addr = *val; Debug (12, "%s <- %x\n", unw_regname (reg), *val); } else { *val = *(unw_word_t *) addr; Debug (12, "%s -> %x\n", unw_regname (reg), *val); } return 0; badreg: Debug (1, "bad register number %u\n", reg); return -UNW_EBADREG; } static int access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val, int write, void *arg) { ucontext_t *uc = arg; unw_fpreg_t *addr; if ((unsigned) (reg - UNW_HPPA_FR) > 32) goto badreg; addr = uc_addr (uc, reg); if (!addr) goto badreg; if (write) { Debug (12, "%s <- %08x.%08x\n", unw_regname (reg), val->raw.bits[1], val->raw.bits[0]); *(unw_fpreg_t *) addr = *val; } else { *val = *(unw_fpreg_t *) addr; Debug (12, "%s -> %08x.%08x\n", unw_regname (reg), val->raw.bits[1], val->raw.bits[0]); } return 0; badreg: Debug (1, "bad register number %u\n", reg); /* attempt to access a non-preserved register */ return -UNW_EBADREG; } static int get_static_proc_name (unw_addr_space_t as, unw_word_t ip, char *buf, size_t buf_len, unw_word_t *offp, void *arg) { return _Uelf32_get_proc_name (as, getpid (), ip, buf, buf_len, offp); } HIDDEN void hppa_local_addr_space_init (void) { memset (&local_addr_space, 0, sizeof (local_addr_space)); local_addr_space.caching_policy = UNW_CACHE_GLOBAL; local_addr_space.acc.find_proc_info = dwarf_find_proc_info; local_addr_space.acc.put_unwind_info = put_unwind_info; local_addr_space.acc.get_dyn_info_list_addr = get_dyn_info_list_addr; local_addr_space.acc.access_mem = access_mem; local_addr_space.acc.access_reg = access_reg; local_addr_space.acc.access_fpreg = access_fpreg; local_addr_space.acc.resume = hppa_local_resume; local_addr_space.acc.get_proc_name = get_static_proc_name; unw_flush_cache (&local_addr_space, 0, 0); } #endif /* !UNW_REMOTE_ONLY */