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(inlined_uc_addr): Also handle f0 and f1.

Browse source 
(ia64_read_only_reg): New function.
(ia64_putfp): Reject puts into read-only save-locations.
(ia64_put): Likewise.

(Logical change 1.229)
This commit is contained in:
hp.com!davidm 2004-05-06 20:24:01 +00:00
parent b8d777bc65
commit ed18defb26
1 changed files with 41 additions and 11 deletions
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52
src/ia64/unwind_i.h
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@ -59,8 +59,15 @@ inlined_uc_addr (ucontext_t *uc, int reg, uint8_t *nat_bitnr)
switch (reg) switch (reg)
{ {
case UNW_IA64_GR + 0: addr = &unw.r0; break; case UNW_IA64_GR + 0: addr = &unw.read_only.r0; break;
case UNW_IA64_NAT + 0: addr = &unw.r0; break; case UNW_IA64_NAT + 0: addr = &unw.read_only.r0; break;
case UNW_IA64_FR + 0: addr = &unw.read_only.f0; break;
case UNW_IA64_FR + 1:
if (__BYTE_ORDER == __BIG_ENDIAN)
addr = &unw.read_only.f1_be;
else
addr = &unw.read_only.f1_le;
break;
case UNW_IA64_IP: addr = &uc->uc_mcontext.sc_br[0]; break; case UNW_IA64_IP: addr = &uc->uc_mcontext.sc_br[0]; break;
case UNW_IA64_CFM: addr = &uc->uc_mcontext.sc_ar_pfs; break; case UNW_IA64_CFM: addr = &uc->uc_mcontext.sc_ar_pfs; break;
case UNW_IA64_AR_RNAT: addr = &uc->uc_mcontext.sc_ar_rnat; break; case UNW_IA64_AR_RNAT: addr = &uc->uc_mcontext.sc_ar_rnat; break;
@ -113,6 +120,15 @@ uc_addr (ucontext_t *uc, int reg, uint8_t *nat_bitnr)
return tdep_uc_addr (uc, reg, nat_bitnr); return tdep_uc_addr (uc, reg, nat_bitnr);
} }
/* Return TRUE if ADDR points inside unw.read_only_reg. */
static inline long
ia64_read_only_reg (void *addr)
{
return ((unsigned long) ((char *) addr - (char *) &unw.read_only)
< sizeof (unw.read_only));
}
#endif /* !defined(HAVE_SYS_UC_ACCESS_H) && !defined(UNW_REMOTE_ONLY) */ #endif /* !defined(HAVE_SYS_UC_ACCESS_H) && !defined(UNW_REMOTE_ONLY) */
/* Bits 0 and 1 of a location are used to encode its type: /* Bits 0 and 1 of a location are used to encode its type:
@ -165,19 +181,26 @@ ia64_getfp (struct cursor *c, unw_word_t loc, unw_fpreg_t *val)
static inline int static inline int
ia64_putfp (struct cursor *c, unw_word_t loc, unw_fpreg_t val) ia64_putfp (struct cursor *c, unw_word_t loc, unw_fpreg_t val)
{ {
if (IA64_IS_NULL_LOC(loc)) unw_fpreg_t *addr = (unw_fpreg_t *) IA64_GET_ADDR (loc);
if (IA64_IS_NULL_LOC (loc))
{ {
Debug (16, "access to unsaved register\n"); Debug (16, "access to unsaved register\n");
return -UNW_EBADREG; return -UNW_EBADREG;
} }
*(unw_fpreg_t *) IA64_GET_ADDR (loc) = val; else if (ia64_read_only_reg (addr))
{
Debug (16, "attempt to read-only register\n");
return -UNW_EREADONLYREG;
}
*addr = val;
return 0; return 0;
} }
static inline int static inline int
ia64_get (struct cursor *c, unw_word_t loc, unw_word_t *val) ia64_get (struct cursor *c, unw_word_t loc, unw_word_t *val)
{ {
if (IA64_IS_NULL_LOC(loc)) if (IA64_IS_NULL_LOC (loc))
{ {
Debug (16, "access to unsaved register\n"); Debug (16, "access to unsaved register\n");
return -UNW_EBADREG; return -UNW_EBADREG;
@ -189,12 +212,19 @@ ia64_get (struct cursor *c, unw_word_t loc, unw_word_t *val)
static inline int static inline int
ia64_put (struct cursor *c, unw_word_t loc, unw_word_t val) ia64_put (struct cursor *c, unw_word_t loc, unw_word_t val)
{ {
if (IA64_IS_NULL_LOC(loc)) unw_word_t *addr = (unw_word_t *) IA64_GET_ADDR (loc);
if (IA64_IS_NULL_LOC (loc))
{ {
Debug (16, "access to unsaved register\n"); Debug (16, "access to unsaved register\n");
return -UNW_EBADREG; return -UNW_EBADREG;
} }
*(unw_word_t *) IA64_GET_ADDR (loc) = (val); else if (ia64_read_only_reg (addr))
{
Debug (16, "attempt to read-only register\n");
return -UNW_EREADONLYREG;
}
*addr = val;
return 0; return 0;
} }
@ -251,7 +281,7 @@ ia64_getfp (struct cursor *c, ia64_loc_t loc, unw_fpreg_t *val)
unw_word_t addr; unw_word_t addr;
int ret; int ret;
if (IA64_IS_NULL_LOC(loc)) if (IA64_IS_NULL_LOC (loc))
{ {
Debug (16, "access to unsaved register\n"); Debug (16, "access to unsaved register\n");
return -UNW_EBADREG; return -UNW_EBADREG;
@ -280,7 +310,7 @@ ia64_putfp (struct cursor *c, ia64_loc_t loc, unw_fpreg_t val)
unw_word_t addr; unw_word_t addr;
int ret; int ret;
if (IA64_IS_NULL_LOC(loc)) if (IA64_IS_NULL_LOC (loc))
{ {
Debug (16, "access to unsaved register\n"); Debug (16, "access to unsaved register\n");
return -UNW_EBADREG; return -UNW_EBADREG;
@ -311,7 +341,7 @@ ia64_putfp (struct cursor *c, ia64_loc_t loc, unw_fpreg_t val)
static inline int static inline int
ia64_get (struct cursor *c, ia64_loc_t loc, unw_word_t *val) ia64_get (struct cursor *c, ia64_loc_t loc, unw_word_t *val)
{ {
if (IA64_IS_NULL_LOC(loc)) if (IA64_IS_NULL_LOC (loc))
{ {
Debug (16, "access to unsaved register\n"); Debug (16, "access to unsaved register\n");
return -UNW_EBADREG; return -UNW_EBADREG;
@ -347,7 +377,7 @@ ia64_get (struct cursor *c, ia64_loc_t loc, unw_word_t *val)
static inline int static inline int
ia64_put (struct cursor *c, ia64_loc_t loc, unw_word_t val) ia64_put (struct cursor *c, ia64_loc_t loc, unw_word_t val)
{ {
if (IA64_IS_NULL_LOC(loc)) if (IA64_IS_NULL_LOC (loc))
{ {
Debug (16, "access to unsaved register\n"); Debug (16, "access to unsaved register\n");
return -UNW_EBADREG; return -UNW_EBADREG;