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target/s390x: Fix relative long instructions with large offsets 

The expression "imm * 2" in gen_ri2() can wrap around if imm is large
enough.

Fix by casting imm to int64_t, like it's done in disas_jdest().

Fixes: e8ecdfeb30 ("Fix EXECUTE of relative branches")
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20230704081506.276055-8-iii@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Ilya Leoshkevich 2023-07-04 10:12:31 +02:00 committed by Thomas Huth
parent b0ef81062d
commit 349372ff9e
1 changed files with 1 additions and 1 deletions
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target/s390x/tcg/translate.c
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@ -5794,7 +5794,7 @@ static TCGv gen_ri2(DisasContext *s)
disas_jdest(s, i2, is_imm, imm, ri2);
if (is_imm) {
ri2 = tcg_constant_i64(s->base.pc_next + imm * 2);
ri2 = tcg_constant_i64(s->base.pc_next + (int64_t)imm * 2);
}
return ri2;