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commit a1da2672bdc5adc551ad30d73eccea902063f583
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Author: Ulrich Weigand <ulrich.weigand@de.ibm.com>
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Date: Fri Jun 12 17:43:48 2015 +0200
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ppc64: Handle short vectors as function return types
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Short synthetic vector types (i.e. those defined using GCC's
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attribute ((vector_size)) instead of AltiVec vector types)
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are returned in r3. Fix ppc64_sysv_abi_return_value to
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correctly handle this.
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gdb/ChangeLog:
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* ppc-sysv-tdep.c (ppc64_sysv_abi_return_value_base): Handle short
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synthetic (non-AltiVec) vector types.
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(ppc64_sysv_abi_return_value): Likewise.
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### a/gdb/ChangeLog
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### b/gdb/ChangeLog
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## -1,3 +1,9 @@
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+2015-05-12 Ulrich Weigand <uweigand@de.ibm.com>
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+
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+ * ppc-sysv-tdep.c (ppc64_sysv_abi_return_value_base): Handle short
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+ synthetic (non-AltiVec) vector types.
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+ (ppc64_sysv_abi_return_value): Likewise.
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+
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2015-06-12 Antoine Tremblay <antoine.tremblay@ericsson.com>
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PR breakpoints/16465
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--- a/gdb/ppc-sysv-tdep.c
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+++ b/gdb/ppc-sysv-tdep.c
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@@ -1892,7 +1892,8 @@ ppc64_sysv_abi_return_value_base (struct gdbarch *gdbarch, struct type *valtype,
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}
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/* AltiVec vectors are returned in VRs starting at v2. */
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- if (TYPE_CODE (valtype) == TYPE_CODE_ARRAY && TYPE_VECTOR (valtype)
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+ if (TYPE_LENGTH (valtype) == 16
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+ && TYPE_CODE (valtype) == TYPE_CODE_ARRAY && TYPE_VECTOR (valtype)
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&& tdep->vector_abi == POWERPC_VEC_ALTIVEC)
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{
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int regnum = tdep->ppc_vr0_regnum + 2 + index;
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@@ -1904,6 +1905,25 @@ ppc64_sysv_abi_return_value_base (struct gdbarch *gdbarch, struct type *valtype,
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return 1;
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}
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+ /* Short vectors are returned in GPRs starting at r3. */
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+ if (TYPE_LENGTH (valtype) <= 8
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+ && TYPE_CODE (valtype) == TYPE_CODE_ARRAY && TYPE_VECTOR (valtype))
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+ {
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+ int regnum = tdep->ppc_gp0_regnum + 3 + index;
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+ int offset = 0;
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+
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+ if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG)
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+ offset = 8 - TYPE_LENGTH (valtype);
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+
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+ if (writebuf != NULL)
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+ regcache_cooked_write_part (regcache, regnum,
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+ offset, TYPE_LENGTH (valtype), writebuf);
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+ if (readbuf != NULL)
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+ regcache_cooked_read_part (regcache, regnum,
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+ offset, TYPE_LENGTH (valtype), readbuf);
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+ return 1;
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+ }
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+
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return 0;
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}
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@@ -1993,6 +2013,7 @@ ppc64_sysv_abi_return_value (struct gdbarch *gdbarch, struct value *function,
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/* Small character arrays are returned, right justified, in r3. */
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if (TYPE_CODE (valtype) == TYPE_CODE_ARRAY
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+ && !TYPE_VECTOR (valtype)
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&& TYPE_LENGTH (valtype) <= 8
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&& TYPE_CODE (TYPE_TARGET_TYPE (valtype)) == TYPE_CODE_INT
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&& TYPE_LENGTH (TYPE_TARGET_TYPE (valtype)) == 1)
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@@ -2012,7 +2033,13 @@ ppc64_sysv_abi_return_value (struct gdbarch *gdbarch, struct value *function,
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/* In the ELFv2 ABI, homogeneous floating-point or vector
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aggregates are returned in registers. */
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if (tdep->elf_abi == POWERPC_ELF_V2
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- && ppc64_elfv2_abi_homogeneous_aggregate (valtype, &eltype, &nelt))
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+ && ppc64_elfv2_abi_homogeneous_aggregate (valtype, &eltype, &nelt)
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+ && (TYPE_CODE (eltype) == TYPE_CODE_FLT
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+ || TYPE_CODE (eltype) == TYPE_CODE_DECFLOAT
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+ || (TYPE_CODE (eltype) == TYPE_CODE_ARRAY
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+ && TYPE_VECTOR (eltype)
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+ && tdep->vector_abi == POWERPC_VEC_ALTIVEC
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+ && TYPE_LENGTH (eltype) == 16)))
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{
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for (i = 0; i < nelt; i++)
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{
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