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2012-03-28 Pedro Alves <palves@redhat.com> 

* ia64-linux-nat.c (supply_fpregset, ia64_linux_fetch_register):
	Always supply $fr0 as 0.0 and $fr1 as 1.0.
This commit is contained in:
Pedro Alves 2012-03-28 17:50:17 +00:00
parent cc0265cdda
commit ca9b8b9ce8
2 changed files with 39 additions and 1 deletions
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5
gdb/ChangeLog
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@ -1,3 +1,8 @@
2012-03-28 Pedro Alves <palves@redhat.com>
* ia64-linux-nat.c (supply_fpregset, ia64_linux_fetch_register):
Always supply $fr0 as 0.0 and $fr1 as 1.0.
2012-03-28 Tom Tromey <tromey@redhat.com>
* python/py-inferior.c (infpy_read_memory): Remove cleanups and

35
gdb/ia64-linux-nat.c
View File

@ -447,8 +447,20 @@ supply_fpregset (struct regcache *regcache, const fpregset_t *fpregsetp)
{
int regi;
const char *from;
const gdb_byte f_zero[16] = { 0 };
const gdb_byte f_one[16] =
{ 0, 0, 0, 0, 0, 0, 0, 0x80, 0xff, 0xff, 0, 0, 0, 0, 0, 0 };
for (regi = IA64_FR0_REGNUM; regi <= IA64_FR127_REGNUM; regi++)
/* Kernel generated cores have fr1==0 instead of 1.0. Older GDBs
did the same. So ignore whatever might be recorded in fpregset_t
for fr0/fr1 and always supply their expected values. */
/* fr0 is always read as zero. */
regcache_raw_supply (regcache, IA64_FR0_REGNUM, f_zero);
/* fr1 is always read as one (1.0). */
regcache_raw_supply (regcache, IA64_FR1_REGNUM, f_one);
for (regi = IA64_FR2_REGNUM; regi <= IA64_FR127_REGNUM; regi++)
{
from = (const char *) &((*fpregsetp)[regi - IA64_FR0_REGNUM]);
regcache_raw_supply (regcache, regi, from);
@ -690,6 +702,27 @@ ia64_linux_fetch_register (struct regcache *regcache, int regnum)
return;
}
/* fr0 cannot be fetched but is always zero. */
if (regnum == IA64_FR0_REGNUM)
{
const gdb_byte f_zero[16] = { 0 };
gdb_assert (sizeof (f_zero) == register_size (gdbarch, regnum));
regcache_raw_supply (regcache, regnum, f_zero);
return;
}
/* fr1 cannot be fetched but is always one (1.0). */
if (regnum == IA64_FR1_REGNUM)
{
const gdb_byte f_one[16] =
{ 0, 0, 0, 0, 0, 0, 0, 0x80, 0xff, 0xff, 0, 0, 0, 0, 0, 0 };
gdb_assert (sizeof (f_one) == register_size (gdbarch, regnum));
regcache_raw_supply (regcache, regnum, f_one);
return;
}
if (ia64_cannot_fetch_register (gdbarch, regnum))
{
regcache_raw_supply (regcache, regnum, NULL);