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target/i386: document incorrect semantics of watchpoint following MOV/POP SS

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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2024-05-29 13:31:39 +02:00
parent 6dd7d8c649
commit cdc829b37d
1 changed files with 6 additions and 0 deletions
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6
target/i386/tcg/sysemu/bpt_helper.c
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@ -215,6 +215,12 @@ void breakpoint_handler(CPUState *cs)
if (cs->watchpoint_hit->flags & BP_CPU) { if (cs->watchpoint_hit->flags & BP_CPU) {
cs->watchpoint_hit = NULL; cs->watchpoint_hit = NULL;
if (check_hw_breakpoints(env, false)) { if (check_hw_breakpoints(env, false)) {
/*
* FIXME: #DB should be delayed by one instruction if
* INHIBIT_IRQ is set (STI cannot trigger a watchpoint).
* The delayed #DB should also fuse with one generated
* by ICEBP (aka INT1).
*/
raise_exception(env, EXCP01_DB); raise_exception(env, EXCP01_DB);
} else { } else {
cpu_loop_exit_noexc(cs); cpu_loop_exit_noexc(cs);