1/* libunwind - a platform-independent unwind library 2 Copyright (C) 2004 Hewlett-Packard Co 3 Contributed by David Mosberger-Tang <davidm@hpl.hp.com> 4 5This file is part of libunwind. 6 7Permission is hereby granted, free of charge, to any person obtaining 8a copy of this software and associated documentation files (the 9"Software"), to deal in the Software without restriction, including 10without limitation the rights to use, copy, modify, merge, publish, 11distribute, sublicense, and/or sell copies of the Software, and to 12permit persons to whom the Software is furnished to do so, subject to 13the following conditions: 14 15The above copyright notice and this permission notice shall be 16included in all copies or substantial portions of the Software. 17 18THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 19EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 21NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 22LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 23OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 24WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ 25 26#include "unwind_i.h" 27 28HIDDEN int 29tdep_access_reg (struct cursor *c, unw_regnum_t reg, unw_word_t *valp, 30 int write) 31{ 32 struct dwarf_loc loc; 33 34 switch (reg) 35 { 36 case UNW_HPPA_IP: 37 if (write) 38 c->dwarf.ip = *valp; /* update the IP cache */ 39 if (c->dwarf.pi_valid && (*valp < c->dwarf.pi.start_ip 40 || *valp >= c->dwarf.pi.end_ip)) 41 c->dwarf.pi_valid = 0; /* new IP outside of current proc */ 42 break; 43 44 case UNW_HPPA_CFA: 45 case UNW_HPPA_SP: 46 if (write) 47 return -UNW_EREADONLYREG; 48 *valp = c->dwarf.cfa; 49 return 0; 50 51 /* Do the exception-handling register remapping: */ 52 case UNW_HPPA_EH0: reg = UNW_HPPA_GR + 20; break; 53 case UNW_HPPA_EH1: reg = UNW_HPPA_GR + 21; break; 54 case UNW_HPPA_EH2: reg = UNW_HPPA_GR + 22; break; 55 case UNW_HPPA_EH3: reg = UNW_HPPA_GR + 31; break; 56 57 default: 58 break; 59 } 60 61 if ((unsigned) (reg - UNW_HPPA_GR) >= 32) 62 return -UNW_EBADREG; 63 64 loc = c->dwarf.loc[reg]; 65 66 if (write) 67 return dwarf_put (&c->dwarf, loc, *valp); 68 else 69 return dwarf_get (&c->dwarf, loc, valp); 70} 71 72HIDDEN int 73tdep_access_fpreg (struct cursor *c, unw_regnum_t reg, unw_fpreg_t *valp, 74 int write) 75{ 76 struct dwarf_loc loc; 77 78 if ((unsigned) (reg - UNW_HPPA_FR) >= 32) 79 return -UNW_EBADREG; 80 81 loc = c->dwarf.loc[reg]; 82 83 if (write) 84 return dwarf_putfp (&c->dwarf, loc, *valp); 85 else 86 return dwarf_getfp (&c->dwarf, loc, valp); 87} 88