Date: Wed, 8 Sep 1999 14:33:57 -0400 (EDT) From: Luoqi Chen <luoqi@watermarkgroup.com> To: marcus@jet.franken.de, nox@jelal.kn-bremen.de Cc: FreeBSD-emulation@FreeBSD.ORG, wine-devel@winehq.com Subject: Re: debugger, stepi, c(ontinue) from breakpoint... Message-ID: <199909081833.OAA12069@lor.watermarkgroup.com>
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>
> - if ((frame.tf_eflags & PSL_T) && !(frame.tf_eflags & PSL_VM)) {
> + if ((frame.tf_eflags & PSL_T) && !(frame.tf_eflags & PSL_VM) &&
> + *callp->sy_call != sigreturn && *callp->sy_call != linux_sigreturn) {
> /* Traced syscall. */
> frame.tf_eflags &= ~PSL_T;
> + /* tell the signal handler this is a trace trap */
> + frame.tf_trapno = T_TRCTRAP;
> trapsignal(p, SIGTRAP, 0);
> }
>
> (so wine must be the first program that handles SIGTAP for itself and
> sets the trace bit from a signal handler? :) I Cc'd this to -emulation,
> are any committers reading or should i also send-pr it?)
>
It seems to me that SIGTRAP is signalled for either a breakpoint or the
TF bit in eflags, so it is probably safe to assume it's a single step
unless the trapno is T_BPTTRAP.
-lq
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