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softmmu: fix for "after access" watchpoints 

Watchpoints that should fire after the memory access
break an execution of the current block, try to
translate current instruction into the separate block,
which then causes debug interrupt.
But cpu_interrupt can't be called in such block when
icount is enabled, because interrupts muse be allowed
explicitly.
This patch sets CF_LAST_IO flag for retranslated block,
allowing interrupt request for the last instruction.

Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgalyuk@ispras.ru>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <163542169727.2127597.8141772572696627329.stgit@pasha-ThinkPad-X280>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Pavel Dovgalyuk 2021-10-28 14:48:17 +03:00 committed by Richard Henderson
parent 1ab0ba8ab5
commit efd629fb21
1 changed files with 1 additions and 1 deletions
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2
softmmu/physmem.c
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@ -946,7 +946,7 @@ void cpu_check_watchpoint(CPUState *cpu, vaddr addr, vaddr len,
cpu_loop_exit(cpu);
} else {
/* Force execution of one insn next time. */
cpu->cflags_next_tb = 1 | curr_cflags(cpu);
cpu->cflags_next_tb = 1 | CF_LAST_IO | curr_cflags(cpu);
mmap_unlock();
cpu_loop_exit_noexc(cpu);
}