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commit 5b757e5ddbd9ad252d9c51103f1aa52b41c2e947
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Author: Ulrich Weigand <ulrich.weigand@de.ibm.com>
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Date: Tue Feb 4 18:33:04 2014 +0100
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PowerPC64 little-endian fixes: 32-bit DFP parameters
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Passing a 32-bit DFP in register needs to use the least-significant part
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of the register. Like with a previous patch that addressed the same
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issue for small structs, this patch makes sure the appropriate offset
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is used on little-endian systems.
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gdb/ChangeLog:
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* ppc-sysv-tdep.c (ppc64_sysv_abi_push_freg): Use correct
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offset on little-endian when passing _Decimal32.
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(ppc64_sysv_abi_return_value_base): Likewise for return values.
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Index: gdb-7.6.1/gdb/ppc-sysv-tdep.c
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===================================================================
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--- gdb-7.6.1.orig/gdb/ppc-sysv-tdep.c
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+++ gdb-7.6.1/gdb/ppc-sysv-tdep.c
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@@ -1231,7 +1231,10 @@ ppc64_sysv_abi_push_freg (struct gdbarch
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if (argpos->regcache && argpos->freg <= 13)
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{
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int regnum = tdep->ppc_fp0_regnum + argpos->freg;
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- int offset = 8 - TYPE_LENGTH (type);
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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 (type);
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regcache_cooked_write_part (argpos->regcache, regnum,
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offset, TYPE_LENGTH (type), val);
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@@ -1640,7 +1643,10 @@ ppc64_sysv_abi_return_value_base (struct
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&& TYPE_CODE (valtype) == TYPE_CODE_DECFLOAT)
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{
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int regnum = tdep->ppc_fp0_regnum + 1 + index;
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- int offset = 8 - TYPE_LENGTH (valtype);
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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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if (writebuf != NULL)
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regcache_cooked_write_part (regcache, regnum,
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