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tcg/ppc: Do not overwrite lower address word on Darwin and AIX 

For targets where TARGET_LONG_BITS != 32, i.e. 64-bit guests,
addr_reg is moved to r4. For hosts without TCG_TARGET_CALL_ALIGN_ARGS
either data_reg2 or data_reg or a masked version thereof would overwrite
r4. Place it in r5 instead, matching TCG_TARGET_CALL_ALIGN_ARGS hosts.

This fixes immediate crashes of 64-bit guests observed on Darwin/ppc but
not on Darwin/ppc64.

Signed-off-by: Andreas Färber <andreas.faerber@web.de>
Acked-by: malc <av1474@comtv.ru>
Acked-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Andreas Färber 2012-05-09 19:26:56 +02:00 committed by Anthony Liguori
parent c438b1970b
commit c1696d94c1
1 changed files with 0 additions and 4 deletions
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4
tcg/ppc/tcg-target.c
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@ -816,11 +816,7 @@ static void tcg_out_qemu_st (TCGContext *s, const TCGArg *args, int opc)
#else
tcg_out_mov (s, TCG_TYPE_I32, 3, addr_reg2);
tcg_out_mov (s, TCG_TYPE_I32, 4, addr_reg);
#ifdef TCG_TARGET_CALL_ALIGN_ARGS
ir = 5;
#else
ir = 4;
#endif
#endif
switch (opc) {