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target-xtensa: fix search_pc for the last TB opcode 

Zero out tcg_ctx.gen_opc_instr_start for instructions representing the
last guest opcode in the TB.

Cc: qemu-stable@nongnu.org
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
(cherry picked from commit 36f25d2537)

*modified to use older global version of gen_opc_instr_start

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
This commit is contained in:
Max Filippov 2012-12-20 00:04:09 +04:00 committed by Michael Roth
parent ff0c079c14
commit 1205b8080f
1 changed files with 5 additions and 1 deletions
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6
target-xtensa/translate.c
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@ -2962,7 +2962,11 @@ static void gen_intermediate_code_internal(
gen_icount_end(tb, insn_count); gen_icount_end(tb, insn_count);
*tcg_ctx.gen_opc_ptr = INDEX_op_end; *tcg_ctx.gen_opc_ptr = INDEX_op_end;
if (!search_pc) { if (search_pc) {
j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf;
memset(gen_opc_instr_start + lj + 1, 0,
(j - lj) * sizeof(gen_opc_instr_start[0]));
} else {
tb->size = dc.pc - pc_start; tb->size = dc.pc - pc_start;
tb->icount = insn_count; tb->icount = insn_count;
} }