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(unw_get_save_loc): New variable "nat_bitnr".

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Adjust NaT-bit handling.  Much simpler now.
	Pass NULL as new third argument to ia64_scratch_loc().
	Set save_loc->extra.nat_bitnr to the NaT bit number (or 0
	when not accessing a NaT bit).

(Logical change 1.181)
This commit is contained in:
mostang.com!davidm 2004-02-27 08:54:25 +00:00
parent ebe6b21c93
commit 7c7bcebcc0
1 changed files with 8 additions and 35 deletions
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43
src/ia64/Gget_save_loc-ia64.c
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@ -34,6 +34,7 @@ unw_get_save_loc (unw_cursor_t *cursor, int reg, unw_save_loc_t *sloc)
{
struct cursor *c = (struct cursor *) cursor;
ia64_loc_t loc, reg_loc;
uint8_t nat_bitnr;
int ret;
loc = IA64_NULL_LOC; /* default to "not saved" */
@ -58,40 +59,10 @@ unw_get_save_loc (unw_cursor_t *cursor, int reg, unw_save_loc_t *sloc)
case UNW_IA64_NAT + 4 ... UNW_IA64_NAT + 7:
loc = c->loc[IA64_REG_NAT4 + (reg - (UNW_IA64_NAT + 4))];
reg_loc = c->loc[IA64_REG_R4 + (reg - (UNW_IA64_NAT + 4))];
nat_bitnr = c->nat_bitnr[reg - (UNW_IA64_NAT + 4)];
if (IA64_IS_FP_LOC (reg_loc))
/* NaT bit saved as a NaTVal. */
loc = reg_loc;
else if (IA64_IS_MEMSTK_NAT (loc))
loc = IA64_LOC_ADDR (IA64_GET_ADDR (loc), 0);
else
{
reg = IA64_GET_REG (loc);
assert (reg >= 0 && reg < 128);
if (!reg)
loc = IA64_NULL_LOC;
else if (reg >= 4 && reg <= 7)
{
#ifdef UNW_LOCAL_ONLY
ucontext_t *uc = c->as_arg;
loc = uc->uc_mcontext.sc_nat;
#else
loc = IA64_REG_LOC (c, UNW_IA64_NAT + reg);
#endif
}
else if (reg >= 32)
{
reg = rotate_gr (c, reg);
ret = ia64_get_stacked (c, reg, NULL, &loc);
if (ret < 0)
return ret;
}
#if !defined(UNW_LOCAL_ONLY) || defined(__linux)
else if (c->last_abi_marker == ABI_MARKER_LINUX_SIGTRAMP
|| c->last_abi_marker == ABI_MARKER_OLD_LINUX_SIGTRAMP)
/* NaT bit is saved in a sigcontext. */
loc = IA64_LOC_ADDR (c->sigcontext_addr + LINUX_SC_NAT_OFF, 0);
#endif
}
break;
case UNW_IA64_FR + 2: loc = c->loc[IA64_REG_F2]; break;
@ -145,7 +116,7 @@ unw_get_save_loc (unw_cursor_t *cursor, int reg, unw_save_loc_t *sloc)
case UNW_IA64_NAT + 2 ... UNW_IA64_NAT + 3:
case UNW_IA64_NAT + 8 ... UNW_IA64_NAT + 31:
loc = ia64_scratch_loc (c, reg);
loc = ia64_scratch_loc (c, reg, &nat_bitnr);
break;
case UNW_IA64_GR + 2 ... UNW_IA64_GR + 3:
@ -157,16 +128,16 @@ unw_get_save_loc (unw_cursor_t *cursor, int reg, unw_save_loc_t *sloc)
case UNW_IA64_AR_CSD:
case UNW_IA64_AR_SSD:
case UNW_IA64_AR_CCV:
loc = ia64_scratch_loc (c, reg);
loc = ia64_scratch_loc (c, reg, NULL);
break;
case UNW_IA64_FR + 6 ... UNW_IA64_FR + 15:
loc = ia64_scratch_loc (c, reg);
loc = ia64_scratch_loc (c, reg, NULL);
break;
case UNW_IA64_FR + 32 ... UNW_IA64_FR + 127:
reg = rotate_fr (c, reg - UNW_IA64_FR) + UNW_IA64_FR;
loc = ia64_scratch_loc (c, reg);
loc = ia64_scratch_loc (c, reg, NULL);
break;
}
@ -183,12 +154,14 @@ unw_get_save_loc (unw_cursor_t *cursor, int reg, unw_save_loc_t *sloc)
{
sloc->type = UNW_SLT_REG;
sloc->u.regnum = IA64_GET_REG (loc);
sloc->extra.nat_bitnr = nat_bitnr;
}
else
#endif
{
sloc->type = UNW_SLT_MEMORY;
sloc->u.addr = IA64_GET_ADDR (loc);
sloc->extra.nat_bitnr = nat_bitnr;
}
return 0;
}