Module Name: src
Committed By: jmcneill
Date: Tue Sep 6 09:55:04 UTC 2011
Modified Files:
src/sys/arch/usermode/dev: cpu.c
src/sys/arch/usermode/usermode: trap.c urkelvisor.c
Log Message:
cpu_lwp_inkernel approach won't work, back to the drawing board
To generate a diff of this commit:
cvs rdiff -u -r1.33 -r1.34 src/sys/arch/usermode/dev/cpu.c
cvs rdiff -u -r1.29 -r1.30 src/sys/arch/usermode/usermode/trap.c
cvs rdiff -u -r1.7 -r1.8 src/sys/arch/usermode/usermode/urkelvisor.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/usermode/dev/cpu.c
diff -u src/sys/arch/usermode/dev/cpu.c:1.33 src/sys/arch/usermode/dev/cpu.c:1.34
--- src/sys/arch/usermode/dev/cpu.c:1.33 Mon Sep 5 20:54:47 2011
+++ src/sys/arch/usermode/dev/cpu.c Tue Sep 6 09:55:04 2011
@@ -1,4 +1,4 @@
-/* $NetBSD: cpu.c,v 1.33 2011/09/05 20:54:47 jmcneill Exp $ */
+/* $NetBSD: cpu.c,v 1.34 2011/09/06 09:55:04 jmcneill Exp $ */
/*-
* Copyright (c) 2007 Jared D. McNeill <jmcne...@invisible.ca>
@@ -29,7 +29,7 @@
#include "opt_cpu.h"
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: cpu.c,v 1.33 2011/09/05 20:54:47 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: cpu.c,v 1.34 2011/09/06 09:55:04 jmcneill Exp $");
#include <sys/param.h>
#include <sys/conf.h>
@@ -58,8 +58,6 @@
#define cpu_unreachable() do { thunk_abort(); } while (0)
#endif
-int cpu_lwp_inkernel = 1;
-
static int cpu_match(device_t, cfdata_t, void *);
static void cpu_attach(device_t, device_t, void *);
@@ -188,7 +186,6 @@
ci->ci_stash = oldlwp;
curlwp = newlwp;
- cpu_lwp_inkernel = curproc->p_vmspace->vm_map.pmap == pmap_kernel();
if (oldpcb) {
oldpcb->pcb_errno = thunk_geterrno();
Index: src/sys/arch/usermode/usermode/trap.c
diff -u src/sys/arch/usermode/usermode/trap.c:1.29 src/sys/arch/usermode/usermode/trap.c:1.30
--- src/sys/arch/usermode/usermode/trap.c:1.29 Tue Sep 6 09:38:27 2011
+++ src/sys/arch/usermode/usermode/trap.c Tue Sep 6 09:55:04 2011
@@ -1,4 +1,4 @@
-/* $NetBSD: trap.c,v 1.29 2011/09/06 09:38:27 reinoud Exp $ */
+/* $NetBSD: trap.c,v 1.30 2011/09/06 09:55:04 jmcneill Exp $ */
/*-
* Copyright (c) 2011 Reinoud Zandijk <rein...@netbsd.org>
@@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: trap.c,v 1.29 2011/09/06 09:38:27 reinoud Exp $");
+__KERNEL_RCSID(0, "$NetBSD: trap.c,v 1.30 2011/09/06 09:55:04 jmcneill Exp $");
#include <sys/types.h>
#include <sys/param.h>
@@ -48,8 +48,6 @@
//#include <machine/instr.h>
//#include <machine/userret.h>
-extern int cpu_lwp_inkernel;
-
/* forwards and externals */
void setup_signal_handlers(void);
static void mem_access_handler(int sig, siginfo_t *info, void *ctx);
@@ -118,8 +116,6 @@
void *onfault;
int kmem, lwp_errno, rv;
- cpu_lwp_inkernel++;
-
recurse++;
if (recurse > 1)
printf("enter trap recursion level %d\n", recurse);
@@ -232,7 +228,6 @@
if (recurse > 1)
printf("leaving trap recursion level %d\n", recurse);
recurse--;
- cpu_lwp_inkernel--;
}
static void
@@ -244,7 +239,6 @@
struct pcb *pcb;
vaddr_t va;
- cpu_lwp_inkernel++;
recurse++;
if (recurse > 1)
printf("enter trap recursion level %d\n", recurse);
@@ -292,5 +286,4 @@
panic("illegal instruction encountered\n");
}
- cpu_lwp_inkernel--;
}
Index: src/sys/arch/usermode/usermode/urkelvisor.c
diff -u src/sys/arch/usermode/usermode/urkelvisor.c:1.7 src/sys/arch/usermode/usermode/urkelvisor.c:1.8
--- src/sys/arch/usermode/usermode/urkelvisor.c:1.7 Mon Sep 5 20:54:48 2011
+++ src/sys/arch/usermode/usermode/urkelvisor.c Tue Sep 6 09:55:04 2011
@@ -1,4 +1,4 @@
-/* $NetBSD: urkelvisor.c,v 1.7 2011/09/05 20:54:48 jmcneill Exp $ */
+/* $NetBSD: urkelvisor.c,v 1.8 2011/09/06 09:55:04 jmcneill Exp $ */
/*-
* Copyright (c) 2011 Jared D. McNeill <jmcne...@invisible.ca>
@@ -32,7 +32,7 @@
#include <sys/cdefs.h>
#ifdef __NetBSD__
-__RCSID("$NetBSD: urkelvisor.c,v 1.7 2011/09/05 20:54:48 jmcneill Exp $");
+__RCSID("$NetBSD: urkelvisor.c,v 1.8 2011/09/06 09:55:04 jmcneill Exp $");
#endif
#include <sys/types.h>
@@ -114,15 +114,12 @@
static int
handle_syscall(struct reg_struct *puregs, pid_t urkel_pid)
{
- extern int cpu_lwp_inkernel;
+ vaddr_t pc;
int sig = 0;
int inkernel;
- errno = 0;
- inkernel = ptrace(PT_READ_D, urkel_pid, &cpu_lwp_inkernel, 0);
- if (errno)
- err(EXIT_FAILURE, "ptrace(PT_READ_D, %d, %p, 0) failed",
- urkel_pid, &cpu_lwp_inkernel);
+ pc = (vaddr_t)R_PC(puregs);
+ inkernel = !(pc >= kmem_user_start && pc < kmem_user_end);
//fprintf(stderr, "%s: pid=%d pc=%p inkernel=%d\n",
// __func__, urkel_pid, (void *)R_PC(puregs), inkernel);
