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(uc_addr): Correct value returned for AR_BSPSTORE.
(Logical change 1.40)
This commit is contained in:
mostang.com!davidm
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commit
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1 changed files with 228 additions and 0 deletions
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/* libunwind - a platform-independent unwind library
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Copyright (C) 2001-2003 Hewlett-Packard Co
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Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
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This file is part of libunwind.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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#include <endian.h>
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#include <stdlib.h>
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#include "rse.h"
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#include "unwind_i.h"
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#ifdef UNW_REMOTE_ONLY
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/* unw_local_addr_space is a NULL pointer in this case. */
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unw_addr_space_t unw_local_addr_space;
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#else
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static struct unw_addr_space local_addr_space;
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unw_addr_space_t unw_local_addr_space = &local_addr_space;
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static inline void *
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uc_addr (ucontext_t *uc, int reg)
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{
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void *addr;
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switch (reg)
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{
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case UNW_IA64_IP: addr = &uc->uc_mcontext.sc_br[0]; break;
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case UNW_IA64_CFM: addr = &uc->uc_mcontext.sc_ar_pfs; break;
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case UNW_IA64_AR_RNAT: addr = &uc->uc_mcontext.sc_ar_rnat; break;
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case UNW_IA64_AR_UNAT: addr = &uc->uc_mcontext.sc_ar_unat; break;
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case UNW_IA64_AR_LC: addr = &uc->uc_mcontext.sc_ar_lc; break;
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case UNW_IA64_AR_FPSR: addr = &uc->uc_mcontext.sc_ar_fpsr; break;
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case UNW_IA64_PR: addr = &uc->uc_mcontext.sc_pr; break;
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/* This may look confusing, but it's correct: AR_BSPSTORE needs
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to return the address past the last word written, which is
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stored in sc_ar_bsp. On the other hand, AR_BSP needs to
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return the address that was in ar.bsp at the time the context
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was captured. As described in unw_init_local(), sc_ar_bsp is
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(ab-)used for this purpose. */
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case UNW_IA64_AR_BSP: addr = &uc->uc_mcontext.sc_rbs_base; break;
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case UNW_IA64_AR_BSPSTORE: addr = &uc->uc_mcontext.sc_ar_bsp; break;
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case UNW_IA64_GR + 4 ... UNW_IA64_GR + 7:
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case UNW_IA64_GR + 12:
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addr = &uc->uc_mcontext.sc_gr[reg - UNW_IA64_GR];
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break;
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case UNW_IA64_BR + 1 ... UNW_IA64_BR + 5:
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addr = &uc->uc_mcontext.sc_br[reg - UNW_IA64_BR];
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break;
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case UNW_IA64_FR+ 2 ... UNW_IA64_FR+ 5:
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case UNW_IA64_FR+16 ... UNW_IA64_FR+31:
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addr = &uc->uc_mcontext.sc_fr[reg - UNW_IA64_FR];
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break;
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default:
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addr = NULL;
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}
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return addr;
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}
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# ifdef UNW_LOCAL_ONLY
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void *
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tdep_uc_addr (ucontext_t *uc, int reg)
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{
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return uc_addr (uc, reg);
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}
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# endif /* UNW_LOCAL_ONLY */
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static void
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put_unwind_info (unw_addr_space_t as, unw_proc_info_t *proc_info, void *arg)
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{
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/* it's a no-op */
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}
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static int
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get_dyn_info_list_addr (unw_addr_space_t as, unw_word_t *dyn_info_list_addr,
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void *arg)
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{
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*dyn_info_list_addr = (unw_word_t) &_U_dyn_info_list;
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return 0;
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}
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static int
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access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *val, int write,
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void *arg)
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{
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if (write)
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{
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debug (100, "%s: mem[%lx] <- %lx\n", __FUNCTION__, addr, *val);
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*(unw_word_t *) addr = *val;
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}
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else
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{
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*val = *(unw_word_t *) addr;
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debug (100, "%s: mem[%lx] -> %lx\n", __FUNCTION__, addr, *val);
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}
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return 0;
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}
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static int
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access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val, int write,
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void *arg)
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{
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unw_word_t *addr, mask;
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ucontext_t *uc = arg;
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if (reg >= UNW_IA64_FR && reg < UNW_IA64_FR + 128)
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goto badreg;
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if (reg >= UNW_IA64_NAT + 4 && reg <= UNW_IA64_NAT + 7)
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{
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mask = ((unw_word_t) 1) << (reg - UNW_IA64_NAT);
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if (write)
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{
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if (*val)
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uc->uc_mcontext.sc_nat |= mask;
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else
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uc->uc_mcontext.sc_nat &= ~mask;
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}
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else
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*val = (uc->uc_mcontext.sc_nat & mask) != 0;
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if (write)
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debug (100, "%s: %s <- %lx\n", __FUNCTION__, unw_regname (reg), *val);
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else
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debug (100, "%s: %s -> %lx\n", __FUNCTION__, unw_regname (reg), *val);
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return 0;
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}
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addr = uc_addr (uc, reg);
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if (!addr)
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goto badreg;
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if (write)
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{
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*(unw_word_t *) addr = *val;
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debug (100, "%s: %s <- %lx\n", __FUNCTION__, unw_regname (reg), *val);
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}
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else
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{
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*val = *(unw_word_t *) addr;
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debug (100, "%s: %s -> %lx\n", __FUNCTION__, unw_regname (reg), *val);
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}
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return 0;
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badreg:
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debug (1, "%s: bad register number %u\n", __FUNCTION__, reg);
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return -UNW_EBADREG;
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}
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static int
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access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
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int write, void *arg)
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{
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ucontext_t *uc = arg;
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unw_fpreg_t *addr;
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if (reg < UNW_IA64_FR || reg >= UNW_IA64_FR + 128)
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goto badreg;
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addr = uc_addr (uc, reg);
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if (!addr)
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goto badreg;
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if (write)
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{
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debug (100, "%s: %s <- %016lx.%016lx\n", __FUNCTION__,
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unw_regname (reg), val->raw.bits[1], val->raw.bits[0]);
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*(unw_fpreg_t *) addr = *val;
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}
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else
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{
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*val = *(unw_fpreg_t *) addr;
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debug (100, "%s: %s -> %016lx.%016lx\n", __FUNCTION__,
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unw_regname (reg), val->raw.bits[1], val->raw.bits[0]);
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}
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return 0;
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badreg:
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debug (1, "%s: bad register number %u\n", __FUNCTION__, reg);
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/* attempt to access a non-preserved register */
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return -UNW_EBADREG;
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}
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HIDDEN void
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ia64_local_addr_space_init (void)
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{
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memset (&local_addr_space, 0, sizeof (local_addr_space));
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ia64_script_cache_init (&local_addr_space.global_cache);
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local_addr_space.big_endian = (__BYTE_ORDER == __BIG_ENDIAN);
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local_addr_space.caching_policy = UNW_CACHE_GLOBAL;
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local_addr_space.acc.find_proc_info = UNW_ARCH_OBJ (find_proc_info);
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local_addr_space.acc.put_unwind_info = put_unwind_info;
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local_addr_space.acc.get_dyn_info_list_addr = get_dyn_info_list_addr;
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local_addr_space.acc.access_mem = access_mem;
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local_addr_space.acc.access_reg = access_reg;
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local_addr_space.acc.access_fpreg = access_fpreg;
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local_addr_space.acc.resume = ia64_local_resume;
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}
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#endif /* !UNW_REMOTE_ONLY */
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