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Send a trace trap only if the trace flag is set at the *beginning* of

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the emulated instruction.
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mycroft 1996-04-18 20:36:35 +00:00
parent 204542255a
commit 15d4e17598
1 changed files with 5 additions and 2 deletions
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7
sys/arch/i386/i386/vm86.c
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@ -1,4 +1,4 @@
/* $NetBSD: vm86.c,v 1.10 1996/04/18 19:58:09 mycroft Exp $ */
/* $NetBSD: vm86.c,v 1.11 1996/04/18 20:36:35 mycroft Exp $ */
/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
@ -285,6 +285,7 @@ vm86_gpfault(p, type)
int type;
{
struct trapframe *tf = p->p_md.md_regs;
int trace;
/*
* we want to fetch some stuff from the current user virtual
* address space for checking. remember that the frame's
@ -298,6 +299,8 @@ vm86_gpfault(p, type)
ss = SS(tf) << 4;
sp = SP(tf);
trace = tf->tf_eflags & PSL_T;
/*
* For most of these, we must set all the registers before calling
* macros/functions which might do a vm86_return.
@ -367,7 +370,7 @@ vm86_gpfault(p, type)
goto bad;
}
if (tf->tf_eflags & PSL_T)
if (trace)
trapsignal(p, SIGTRAP, T_TRCTRAP);
return;