9vx: found the bug - vx32 - Local 9vx git repository for patches.
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---
(DIR) commit 3945e86207f2afcbc6a2e0a63e82c417ce210db9
(DIR) parent 782ab6b09be00536665dd4fb507e93a150ce1ebf
(HTM) Author: Russ Cox <rsc@swtch.com>
Date: Mon, 8 Dec 2008 10:04:19 -0800
9vx: found the bug
Diffstat:
src/9vx/vx32.c | 19 ++++---------------
1 file changed, 4 insertions(+), 15 deletions(-)
---
(DIR) diff --git a/src/9vx/vx32.c b/src/9vx/vx32.c
@@ -223,7 +223,6 @@ touser(void *initsp)
* User-mode execution loop.
*/
for(;;){
-iprint("X\n");
/*
* Optimization: try to fault in code page and stack
* page right now, since we're likely to need them.
@@ -256,6 +255,7 @@ iprint("X\n");
if(rc < 0)
panic("vxproc_run: %r");
+if(rc == 0x240 && vp->cpu->reg[EAX] == 4) { xxclose(); }
if(traceprocs)
iprint("-vx32 %p %p %s eip=%lux esp=%lux rc=%#x\n",
m, up, up->text, vp->cpu->eip, vp->cpu->reg[ESP], rc);
@@ -281,19 +281,10 @@ iprint("X\n");
if(abortonfault)
abort();
}
-iprint("U\n");
up->dbgreg = &u;
-iprint("P\n");
-struct timeval tv;
-ttv.tv_sec = 0;
-ttv.tv_usec = 1000;
-select(0, 0, 0, 0, &tv);
-iprint("P1\n");
proc2ureg(vp, &u);
-iprint("Q\n");
u.trap = rc;
-iprint("T\n");
trap(&u);
ureg2proc(&u, vp);
}
@@ -307,10 +298,9 @@ breakme(void)
static void
proc2ureg(vxproc *vp, Ureg *u)
{
-static int x;
-iprint("proc2ureg %p %p %d\n", vp, u, ++x);
-if(x==1588) breakme();
-// memset(u, 0, sizeof *u);
+XXX this memset runs backward because the direction bit
+is set wrong on entry!
+ memset(u, 0, sizeof *u);
u->pc = vp->cpu->eip;
u->ax = vp->cpu->reg[EAX];
u->bx = vp->cpu->reg[EBX];
@@ -319,7 +309,6 @@ if(x==1588) breakme();
u->si = vp->cpu->reg[ESI];
u->di = vp->cpu->reg[EDI];
u->usp = vp->cpu->reg[ESP];
-iprint("proc2ureg %p %p\n", vp, u);
}
static void