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ed80cd6809
* dwarf2out.c (expand_builtin_init_dwarf_reg_sizes): Honor
DWARF_ALT_FRAME_RETURN_COLUMN.
* unwind-dw2.c (dwarf_reg_size_table): Expand by one.
(_Unwind_GetGR, _Unwind_SetGR): Validate lookup column.
(uw_frame_state_for): Return end-of-stack for null return address.
* doc/tm.texi (DWARF_ALT_FRAME_RETURN_COLUMN): Add.
* config/alpha/alpha.c (alpha_sa_mask): Add r31 for eh_return.
(alpha_expand_prologue): Store a zero for it.
(alpha_expand_epilogue): Don't reload it.
* config/alpha/alpha.h (DWARF_ALT_FRAME_RETURN_COLUMN): New.
* config/alpha/linux.h (MD_FALLBACK_FRAME_STATE_FOR): Use column 64
for the sigframe return address.
From-SVN: r71967
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