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- /* libunwind - a platform-independent unwind library
- Copyright (C) 2006-2007 IBM
- Contributed by
- Corey Ashford <cjashfor@us.ibm.com>
- Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@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 "unwind_i.h"
- HIDDEN int
- tdep_access_reg (struct cursor *c, unw_regnum_t reg, unw_word_t *valp,
- int write)
- {
- struct dwarf_loc loc;
- switch (reg)
- {
- case UNW_TDEP_IP:
- if (write)
- {
- c->dwarf.ip = *valp; /* update the IP cache */
- if (c->dwarf.pi_valid && (*valp < c->dwarf.pi.start_ip
- || *valp >= c->dwarf.pi.end_ip))
- c->dwarf.pi_valid = 0; /* new IP outside of current proc */
- }
- else
- *valp = c->dwarf.ip;
- return 0;
- case UNW_TDEP_SP:
- if (write)
- return -UNW_EREADONLYREG;
- *valp = c->dwarf.cfa;
- return 0;
- default:
- break;
- }
- /* make sure it's not an FP or VR register */
- if ((((unsigned) (reg - UNW_PPC32_F0)) <= 31))
- return -UNW_EBADREG;
- loc = c->dwarf.loc[reg];
- if (write)
- return dwarf_put (&c->dwarf, loc, *valp);
- else
- return dwarf_get (&c->dwarf, loc, valp);
- }
- HIDDEN int
- tdep_access_fpreg (struct cursor *c, unw_regnum_t reg, unw_fpreg_t *valp,
- int write)
- {
- struct dwarf_loc loc;
- if ((unsigned) (reg - UNW_PPC32_F0) < 32)
- {
- loc = c->dwarf.loc[reg];
- if (write)
- return dwarf_putfp (&c->dwarf, loc, *valp);
- else
- return dwarf_getfp (&c->dwarf, loc, valp);
- }
- return -UNW_EBADREG;
- }
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