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[src/trunk]: src/sys/arch/arm Consistency around the user trapframe for all L...
details: https://anonhg.NetBSD.org/src/rev/f848fdc7ebca
branches: trunk
changeset: 825176:f848fdc7ebca
user: skrll <skrll%NetBSD.org@localhost>
date: Sun Jul 02 16:16:44 2017 +0000
description:
Consistency around the user trapframe for all LWPs and there's no need to
keep assigning it in kernel entry points.
diffstat:
sys/arch/arm/arm/syscall.c | 6 +++---
sys/arch/arm/arm/undefined.c | 7 ++++---
sys/arch/arm/arm32/arm32_boot.c | 27 ++++++++++++++++++++++++---
sys/arch/arm/arm32/arm32_machdep.c | 26 +++++++++++++++++++++++---
sys/arch/arm/arm32/fault.c | 18 +++++++++---------
5 files changed, 63 insertions(+), 21 deletions(-)
diffs (227 lines):
diff -r d5d654fb0e22 -r f848fdc7ebca sys/arch/arm/arm/syscall.c
--- a/sys/arch/arm/arm/syscall.c Sun Jul 02 16:06:42 2017 +0000
+++ b/sys/arch/arm/arm/syscall.c Sun Jul 02 16:16:44 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: syscall.c,v 1.61 2017/07/02 16:06:42 skrll Exp $ */
+/* $NetBSD: syscall.c,v 1.62 2017/07/02 16:16:44 skrll Exp $ */
/*-
* Copyright (c) 2000, 2003 The NetBSD Foundation, Inc.
@@ -71,7 +71,7 @@
#include <sys/param.h>
-__KERNEL_RCSID(0, "$NetBSD: syscall.c,v 1.61 2017/07/02 16:06:42 skrll Exp $");
+__KERNEL_RCSID(0, "$NetBSD: syscall.c,v 1.62 2017/07/02 16:16:44 skrll Exp $");
#include <sys/cpu.h>
#include <sys/device.h>
@@ -155,7 +155,7 @@
#endif
}
- lwp_settrapframe(l, tf);
+ KASSERTMSG(tf == lwp_trapframe(l), "tf %p vs %p", tf, lwp_trapframe(l));
#ifdef CPU_ARM7
/*
diff -r d5d654fb0e22 -r f848fdc7ebca sys/arch/arm/arm/undefined.c
--- a/sys/arch/arm/arm/undefined.c Sun Jul 02 16:06:42 2017 +0000
+++ b/sys/arch/arm/arm/undefined.c Sun Jul 02 16:16:44 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: undefined.c,v 1.59 2017/05/06 13:05:59 skrll Exp $ */
+/* $NetBSD: undefined.c,v 1.60 2017/07/02 16:16:44 skrll Exp $ */
/*
* Copyright (c) 2001 Ben Harris.
@@ -55,7 +55,7 @@
#include <sys/kgdb.h>
#endif
-__KERNEL_RCSID(0, "$NetBSD: undefined.c,v 1.59 2017/05/06 13:05:59 skrll Exp $");
+__KERNEL_RCSID(0, "$NetBSD: undefined.c,v 1.60 2017/07/02 16:16:44 skrll Exp $");
#include <sys/kmem.h>
#include <sys/queue.h>
@@ -420,7 +420,8 @@
* time of fault.
*/
fault_code = FAULT_USER;
- lwp_settrapframe(l, tf);
+ KASSERTMSG(tf == lwp_trapframe(l), "tf %p vs %p", tf,
+ lwp_trapframe(l));
} else
fault_code = 0;
diff -r d5d654fb0e22 -r f848fdc7ebca sys/arch/arm/arm32/arm32_boot.c
--- a/sys/arch/arm/arm32/arm32_boot.c Sun Jul 02 16:06:42 2017 +0000
+++ b/sys/arch/arm/arm32/arm32_boot.c Sun Jul 02 16:16:44 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: arm32_boot.c,v 1.18 2016/12/22 14:47:54 cherry Exp $ */
+/* $NetBSD: arm32_boot.c,v 1.19 2017/07/02 16:16:44 skrll Exp $ */
/*
* Copyright (c) 2002, 2003, 2005 Genetec Corporation. All rights reserved.
@@ -123,7 +123,7 @@
#include <sys/cdefs.h>
-__KERNEL_RCSID(1, "$NetBSD: arm32_boot.c,v 1.18 2016/12/22 14:47:54 cherry Exp $");
+__KERNEL_RCSID(1, "$NetBSD: arm32_boot.c,v 1.19 2017/07/02 16:16:44 skrll Exp $");
#include "opt_ddb.h"
#include "opt_kgdb.h"
@@ -173,6 +173,27 @@
*/
uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);
+ struct lwp * const l = &lwp0;
+ struct pcb * const pcb = lwp_getpcb(l);
+
+ /* Zero out the PCB. */
+ memset(pcb, 0, sizeof(*pcb));
+
+ pcb->pcb_ksp = uvm_lwp_getuarea(l) + USPACE_SVC_STACK_TOP;
+ pcb->pcb_ksp -= sizeof(struct trapframe);
+
+ struct trapframe * tf = (struct trapframe *)pcb->pcb_ksp;
+
+ /* Zero out the trapframe. */
+ memset(tf, 0, sizeof(*tf));
+ lwp_settrapframe(l, tf);
+
+#if defined(__ARMEB__)
+ tf->tf_spsr = PSR_USR32_MODE | (CPU_IS_ARMV7_P() ? PSR_E_BIT : 0);
+#else
+ tf->tf_spsr = PSR_USR32_MODE;
+#endif
+
#ifdef VERBOSE_INIT_ARM
printf("bootstrap done.\n");
#endif
@@ -313,7 +334,7 @@
#endif
/* We return the new stack pointer address */
- return kernelstack.pv_va + USPACE_SVC_STACK_TOP;
+ return pcb->pcb_ksp;
}
#ifdef MULTIPROCESSOR
diff -r d5d654fb0e22 -r f848fdc7ebca sys/arch/arm/arm32/arm32_machdep.c
--- a/sys/arch/arm/arm32/arm32_machdep.c Sun Jul 02 16:06:42 2017 +0000
+++ b/sys/arch/arm/arm32/arm32_machdep.c Sun Jul 02 16:16:44 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: arm32_machdep.c,v 1.113 2017/07/02 16:06:42 skrll Exp $ */
+/* $NetBSD: arm32_machdep.c,v 1.114 2017/07/02 16:16:44 skrll Exp $ */
/*
* Copyright (c) 1994-1998 Mark Brinicombe.
@@ -42,7 +42,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: arm32_machdep.c,v 1.113 2017/07/02 16:06:42 skrll Exp $");
+__KERNEL_RCSID(0, "$NetBSD: arm32_machdep.c,v 1.114 2017/07/02 16:16:44 skrll Exp $");
#include "opt_modular.h"
#include "opt_md.h"
@@ -315,10 +315,30 @@
format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free));
printf("avail memory = %s\n", pbuf);
+ /*
+ * This is actually done by initarm_common, but not all ports use it
+ * yet so do it here to catch them as well
+ */
struct lwp * const l = &lwp0;
struct pcb * const pcb = lwp_getpcb(l);
+
+ /* Zero out the PCB. */
+ memset(pcb, 0, sizeof(*pcb));
+
pcb->pcb_ksp = uvm_lwp_getuarea(l) + USPACE_SVC_STACK_TOP;
- lwp_settrapframe(l, (struct trapframe *)pcb->pcb_ksp - 1);
+ pcb->pcb_ksp -= sizeof(struct trapframe);
+
+ struct trapframe * tf = (struct trapframe *)pcb->pcb_ksp;
+
+ /* Zero out the trapframe. */
+ memset(tf, 0, sizeof(*tf));
+ lwp_settrapframe(l, tf);
+
+#if defined(__ARMEB__)
+ tf->tf_spsr = PSR_USR32_MODE | (CPU_IS_ARMV7_P() ? PSR_E_BIT : 0);
+#else
+ tf->tf_spsr = PSR_USR32_MODE;
+#endif
}
/*
diff -r d5d654fb0e22 -r f848fdc7ebca sys/arch/arm/arm32/fault.c
--- a/sys/arch/arm/arm32/fault.c Sun Jul 02 16:06:42 2017 +0000
+++ b/sys/arch/arm/arm32/fault.c Sun Jul 02 16:16:44 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: fault.c,v 1.103 2015/03/02 13:36:36 martin Exp $ */
+/* $NetBSD: fault.c,v 1.104 2017/07/02 16:16:44 skrll Exp $ */
/*
* Copyright 2003 Wasabi Systems, Inc.
@@ -81,7 +81,7 @@
#include "opt_kgdb.h"
#include <sys/types.h>
-__KERNEL_RCSID(0, "$NetBSD: fault.c,v 1.103 2015/03/02 13:36:36 martin Exp $");
+__KERNEL_RCSID(0, "$NetBSD: fault.c,v 1.104 2017/07/02 16:16:44 skrll Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -310,9 +310,8 @@
return;
}
- if (user) {
- lwp_settrapframe(l, tf);
- }
+ KASSERTMSG(!user || tf == lwp_trapframe(l), "tf %p vs %p", tf,
+ lwp_trapframe(l));
/*
* Make sure the Program Counter is sane. We could fall foul of
@@ -624,7 +623,7 @@
ksi->ksi_addr = (uint32_t *)(intptr_t)far;
ksi->ksi_trap = fsr;
- lwp_settrapframe(l, tf);
+ KASSERTMSG(tf == lwp_trapframe(l), "tf %p vs %p", tf, lwp_trapframe(l));
return (1);
}
@@ -731,7 +730,7 @@
ksi->ksi_addr = (uint32_t *)(intptr_t)far;
ksi->ksi_trap = fsr;
- lwp_settrapframe(l, tf);
+ KASSERTMSG(tf == lwp_trapframe(l), "tf %p vs %p", tf, lwp_trapframe(l));
return (1);
}
@@ -834,7 +833,8 @@
ksi.ksi_signo = SIGILL;
ksi.ksi_code = ILL_ILLOPC;
ksi.ksi_addr = (uint32_t *)(intptr_t) tf->tf_pc;
- lwp_settrapframe(l, tf);
+ KASSERTMSG(tf == lwp_trapframe(l), "tf %p vs %p", tf,
+ lwp_trapframe(l));
goto do_trapsignal;
default:
break;
@@ -846,7 +846,7 @@
/* Get fault address */
fault_pc = tf->tf_pc;
- lwp_settrapframe(l, tf);
+ KASSERTMSG(tf == lwp_trapframe(l), "tf %p vs %p", tf, lwp_trapframe(l));
UVMHIST_LOG(maphist, " (pc=0x%x, l=0x%x, tf=0x%x)",
fault_pc, l, tf, 0);
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