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devvmx: add support for extrap command to configure halting on exceptions

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This commit is contained in:
aiju 2017-06-21 22:19:14 +00:00
parent 5c0bff4ba2
commit cabfa4e916
1 changed files with 26 additions and 0 deletions
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26
sys/src/9/pc/devvmx.c
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@ -1445,6 +1445,18 @@ cmdirq(VmCmd *, va_list va)
return 0;
}
static int
cmdextrap(VmCmd *, va_list va)
{
char *p, *q;
u32int v;
p = va_arg(va, char *);
v = strtoul(p, &q, 0);
if(q == p || *q != 0) error(Ebadarg);
vmcswrite(EXC_BITMAP, v);
return 0;
}
static int
gotcmd(void *)
@ -1669,6 +1681,7 @@ enum {
CMstep,
CMexc,
CMirq,
CMextrap,
};
static Cmdtab vmxctlmsg[] = {
@ -1679,6 +1692,7 @@ static Cmdtab vmxctlmsg[] = {
CMstep, "step", 0,
CMexc, "exc", 2,
CMirq, "irq", 0,
CMextrap, "extrap", 2,
};
static int
@ -1921,6 +1935,18 @@ vmxwrite(Chan* c, void* a, long n, vlong off)
poperror();
free(s);
break;
case CMextrap:
s = nil;
kstrdup(&s, cb->f[1]);
if(waserror()){
free(s);
nexterror();
}
vmxcmd(cmdextrap, s);
poperror();
free(s);
break;
default:
error(Egreg);
}