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ppc64: Handle short vectors as function return types 

Short synthetic vector types (i.e. those defined using GCC's
attribute ((vector_size)) instead of AltiVec vector types)
are returned in r3.  Fix ppc64_sysv_abi_return_value to
correctly handle this.

gdb/ChangeLog:

	* ppc-sysv-tdep.c (ppc64_sysv_abi_return_value_base): Handle short
	synthetic (non-AltiVec) vector types.
	(ppc64_sysv_abi_return_value): Likewise.
This commit is contained in:
Ulrich Weigand 2015-06-12 17:43:48 +02:00
parent a348708291
commit a1da2672bd
2 changed files with 35 additions and 2 deletions
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6
gdb/ChangeLog
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@ -1,3 +1,9 @@
2015-05-12 Ulrich Weigand <uweigand@de.ibm.com>
* ppc-sysv-tdep.c (ppc64_sysv_abi_return_value_base): Handle short
synthetic (non-AltiVec) vector types.
(ppc64_sysv_abi_return_value): Likewise.
2015-06-12 Antoine Tremblay <antoine.tremblay@ericsson.com>
PR breakpoints/16465

31
gdb/ppc-sysv-tdep.c
View File

@ -1892,7 +1892,8 @@ ppc64_sysv_abi_return_value_base (struct gdbarch *gdbarch, struct type *valtype,
}
/* AltiVec vectors are returned in VRs starting at v2. */
if (TYPE_CODE (valtype) == TYPE_CODE_ARRAY && TYPE_VECTOR (valtype)
if (TYPE_LENGTH (valtype) == 16
&& TYPE_CODE (valtype) == TYPE_CODE_ARRAY && TYPE_VECTOR (valtype)
&& tdep->vector_abi == POWERPC_VEC_ALTIVEC)
{
int regnum = tdep->ppc_vr0_regnum + 2 + index;
@ -1904,6 +1905,25 @@ ppc64_sysv_abi_return_value_base (struct gdbarch *gdbarch, struct type *valtype,
return 1;
}
/* Short vectors are returned in GPRs starting at r3. */
if (TYPE_LENGTH (valtype) <= 8
&& TYPE_CODE (valtype) == TYPE_CODE_ARRAY && TYPE_VECTOR (valtype))
{
int regnum = tdep->ppc_gp0_regnum + 3 + index;
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,
offset, TYPE_LENGTH (valtype), writebuf);
if (readbuf != NULL)
regcache_cooked_read_part (regcache, regnum,
offset, TYPE_LENGTH (valtype), readbuf);
return 1;
}
return 0;
}
@ -1993,6 +2013,7 @@ ppc64_sysv_abi_return_value (struct gdbarch *gdbarch, struct value *function,
/* Small character arrays are returned, right justified, in r3. */
if (TYPE_CODE (valtype) == TYPE_CODE_ARRAY
&& !TYPE_VECTOR (valtype)
&& TYPE_LENGTH (valtype) <= 8
&& TYPE_CODE (TYPE_TARGET_TYPE (valtype)) == TYPE_CODE_INT
&& TYPE_LENGTH (TYPE_TARGET_TYPE (valtype)) == 1)
@ -2012,7 +2033,13 @@ ppc64_sysv_abi_return_value (struct gdbarch *gdbarch, struct value *function,
/* In the ELFv2 ABI, homogeneous floating-point or vector
aggregates are returned in registers. */
if (tdep->elf_abi == POWERPC_ELF_V2
&& ppc64_elfv2_abi_homogeneous_aggregate (valtype, &eltype, &nelt))
&& ppc64_elfv2_abi_homogeneous_aggregate (valtype, &eltype, &nelt)
&& (TYPE_CODE (eltype) == TYPE_CODE_FLT
|| TYPE_CODE (eltype) == TYPE_CODE_DECFLOAT
|| (TYPE_CODE (eltype) == TYPE_CODE_ARRAY
&& TYPE_VECTOR (eltype)
&& tdep->vector_abi == POWERPC_VEC_ALTIVEC
&& TYPE_LENGTH (eltype) == 16)))
{
for (i = 0; i < nelt; i++)
{