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(access_reg): Do not reject accesses to floating-point registers. On

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little-endian machines, this automagically does the right thing
	and on HP-UX (big-endian) we never use this routine.
	Reject write-accesses to read-only save-locations (such as
	unw.read_only.r0).
(access_fpreg): Reject write-accesses to read-only save-locations.

(Logical change 1.229)
This commit is contained in:
hp.com!davidm 2004-05-06 20:24:01 +00:00
parent ec634b320c
commit b8d777bc65
1 changed files with 12 additions and 5 deletions
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17
src/ia64/Ginit-ia64.c
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@ -290,9 +290,6 @@ access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val, int write,
unw_word_t *addr, mask; unw_word_t *addr, mask;
ucontext_t *uc = arg; ucontext_t *uc = arg;
if (reg >= UNW_IA64_FR && reg < UNW_IA64_FR + 128)
goto badreg;
if (reg >= UNW_IA64_NAT + 4 && reg <= UNW_IA64_NAT + 7) if (reg >= UNW_IA64_NAT + 4 && reg <= UNW_IA64_NAT + 7)
{ {
mask = ((unw_word_t) 1) << (reg - UNW_IA64_NAT); mask = ((unw_word_t) 1) << (reg - UNW_IA64_NAT);
@ -319,7 +316,12 @@ access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val, int write,
if (write) if (write)
{ {
*(unw_word_t *) addr = *val; if (ia64_read_only_reg (addr))
{
Debug (16, "attempt to write read-only register\n");
return -UNW_EREADONLYREG;
}
*addr = *val;
Debug (12, "%s <- %lx\n", unw_regname (reg), *val); Debug (12, "%s <- %lx\n", unw_regname (reg), *val);
} }
else else
@ -350,9 +352,14 @@ access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
if (write) if (write)
{ {
if (ia64_read_only_reg (addr))
{
Debug (16, "attempt to write read-only register\n");
return -UNW_EREADONLYREG;
}
*addr = *val;
Debug (12, "%s <- %016lx.%016lx\n", Debug (12, "%s <- %016lx.%016lx\n",
unw_regname (reg), val->raw.bits[1], val->raw.bits[0]); unw_regname (reg), val->raw.bits[1], val->raw.bits[0]);
*(unw_fpreg_t *) addr = *val;
} }
else else
{ {