| /* libunwind - a platform-independent unwind library |
| Copyright (C) 2008 CodeSourcery |
| |
| 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 "unwind_i.h" |
| #include "dwarf_i.h" |
| |
| HIDDEN pthread_mutex_t arm_lock = PTHREAD_MUTEX_INITIALIZER; |
| HIDDEN int tdep_needs_initialization = 1; |
| |
| /* Unwinding methods to use. See UNW_METHOD_ enums */ |
| HIDDEN int unwi_unwind_method = UNW_ARM_METHOD_ALL; |
| |
| /* FIXME: I'm pretty sure we don't need this at all for ARM, but "generic" |
| code (include/dwarf_i.h) seems to expect it to be here at present. */ |
| |
| HIDDEN uint8_t dwarf_to_unw_regnum_map[16] = |
| { |
| /* 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 */ |
| UNW_ARM_R0, UNW_ARM_R1, UNW_ARM_R2, UNW_ARM_R3, UNW_ARM_R4, UNW_ARM_R5, |
| UNW_ARM_R6, UNW_ARM_R7, UNW_ARM_R8, UNW_ARM_R9, UNW_ARM_R10, UNW_ARM_R11, |
| UNW_ARM_R12, UNW_ARM_R13, UNW_ARM_R14, UNW_ARM_R15 |
| }; |
| |
| HIDDEN void |
| tdep_init (void) |
| { |
| intrmask_t saved_mask; |
| |
| sigfillset (&unwi_full_mask); |
| |
| lock_acquire (&arm_lock, saved_mask); |
| { |
| if (!tdep_needs_initialization) |
| /* another thread else beat us to it... */ |
| goto out; |
| |
| /* read ARM unwind method setting */ |
| const char* str = getenv ("UNW_ARM_UNWIND_METHOD"); |
| if (str) |
| { |
| unwi_unwind_method = atoi (str); |
| } |
| |
| mi_init (); |
| |
| dwarf_init (); |
| |
| #ifndef UNW_REMOTE_ONLY |
| arm_local_addr_space_init (); |
| #endif |
| tdep_needs_initialization = 0; /* signal that we're initialized... */ |
| } |
| out: |
| lock_release (&arm_lock, saved_mask); |
| } |