1 /* libunwind - a platform-independent unwind library 2 Copyright (c) 2002-2004 Hewlett-Packard Development Company, L.P. 3 Contributed by David Mosberger-Tang <davidm (at) hpl.hp.com> 4 5 This file is part of libunwind. 6 7 Permission is hereby granted, free of charge, to any person obtaining 8 a copy of this software and associated documentation files (the 9 "Software"), to deal in the Software without restriction, including 10 without limitation the rights to use, copy, modify, merge, publish, 11 distribute, sublicense, and/or sell copies of the Software, and to 12 permit persons to whom the Software is furnished to do so, subject to 13 the following conditions: 14 15 The above copyright notice and this permission notice shall be 16 included in all copies or substantial portions of the Software. 17 18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 19 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 21 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 22 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 23 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 24 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ 25 26 #include <stdlib.h> 27 28 #include "unwind_i.h" 29 #include "offsets.h" 30 31 /* This routine is responsible for copying the register values in 32 cursor C and establishing them as the current machine state. */ 33 34 static inline int 35 establish_machine_state (struct cursor *c) 36 { 37 int (*access_reg) (unw_addr_space_t, unw_regnum_t, unw_word_t *, 38 int write, void *); 39 int (*access_fpreg) (unw_addr_space_t, unw_regnum_t, unw_fpreg_t *, 40 int write, void *); 41 unw_addr_space_t as = c->dwarf.as; 42 void *arg = c->dwarf.as_arg; 43 unw_fpreg_t fpval; 44 unw_word_t val; 45 int reg; 46 47 access_reg = as->acc.access_reg; 48 access_fpreg = as->acc.access_fpreg; 49 50 Debug (8, "copying out cursor state\n"); 51 52 for (reg = 0; reg <= UNW_REG_LAST; ++reg) 53 { 54 Debug (16, "copying %s %d\n", unw_regname (reg), reg); 55 if (unw_is_fpreg (reg)) 56 { 57 if (tdep_access_fpreg (c, reg, &fpval, 0) >= 0) 58 (*access_fpreg) (as, reg, &fpval, 1, arg); 59 } 60 else 61 { 62 if (tdep_access_reg (c, reg, &val, 0) >= 0) 63 (*access_reg) (as, reg, &val, 1, arg); 64 } 65 } 66 return 0; 67 } 68 69 PROTECTED int 70 unw_resume (unw_cursor_t *cursor) 71 { 72 struct cursor *c = (struct cursor *) cursor; 73 int ret; 74 75 Debug (1, "(cursor=%p)\n", c); 76 77 if ((ret = establish_machine_state (c)) < 0) 78 return ret; 79 80 return (*c->dwarf.as->acc.resume) (c->dwarf.as, (unw_cursor_t *) c, 81 c->dwarf.as_arg); 82 } 83
