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PowerPC64 little-endian fixes: 32-bit DFP parameters 

Passing a 32-bit DFP in register needs to use the least-significant part
of the register.  Like with a previous patch that addressed the same
issue for small structs, this patch makes sure the appropriate offset
is used on little-endian systems.

gdb/ChangeLog:

	* ppc-sysv-tdep.c (ppc64_sysv_abi_push_freg): Use correct
	offset on little-endian when passing _Decimal32.
	(ppc64_sysv_abi_return_value_base): Likewise for return values.
This commit is contained in:
Ulrich Weigand 2014-02-04 18:33:04 +01:00
parent 084ee54552
commit 5b757e5ddb
2 changed files with 14 additions and 2 deletions
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6
gdb/ChangeLog
View File

@ -1,3 +1,9 @@
2014-02-04 Ulrich Weigand  <uweigand@de.ibm.com>
* ppc-sysv-tdep.c (ppc64_sysv_abi_push_freg): Use correct
offset on little-endian when passing _Decimal32.
(ppc64_sysv_abi_return_value_base): Likewise for return values.
2014-02-04 Ulrich Weigand  <uweigand@de.ibm.com>
* rs6000-tdep.c (efpr_pseudo_register_read): Use correct offset

10
gdb/ppc-sysv-tdep.c
View File

@ -1232,7 +1232,10 @@ ppc64_sysv_abi_push_freg (struct gdbarch *gdbarch,
if (argpos->regcache && argpos->freg <= 13)
{
int regnum = tdep->ppc_fp0_regnum + argpos->freg;
int offset = 8 - TYPE_LENGTH (type);
int offset = 0;
if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG)
offset = 8 - TYPE_LENGTH (type);
regcache_cooked_write_part (argpos->regcache, regnum,
offset, TYPE_LENGTH (type), val);
@ -1641,7 +1644,10 @@ ppc64_sysv_abi_return_value_base (struct gdbarch *gdbarch, struct type *valtype,
&& TYPE_CODE (valtype) == TYPE_CODE_DECFLOAT)
{
int regnum = tdep->ppc_fp0_regnum + 1 + index;
int offset = 8 - TYPE_LENGTH (valtype);
int offset = 0;
if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG)
offset = 8 - TYPE_LENGTH (valtype);
if (writebuf != NULL)
regcache_cooked_write_part (regcache, regnum,