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[src/trunk]: src/sys/arch/arm Add read_insn and read_thumb_insn inlines to hi...
details: https://anonhg.NetBSD.org/src/rev/bcdff0750c61
branches: trunk
changeset: 793187:bcdff0750c61
user: matt <matt%NetBSD.org@localhost>
date: Wed Jan 29 18:45:20 2014 +0000
description:
Add read_insn and read_thumb_insn inlines to hide the endianness of
instructions and use them as appropriate.
diffstat:
sys/arch/arm/arm/syscall.c | 12 +++-------
sys/arch/arm/arm/undefined.c | 23 +++++----------------
sys/arch/arm/arm32/fault.c | 45 +++++++++++++++++++++---------------------
sys/arch/arm/include/locore.h | 36 ++++++++++++++++++++++++++++++++++
4 files changed, 69 insertions(+), 47 deletions(-)
diffs (235 lines):
diff -r e02b4cd2957e -r bcdff0750c61 sys/arch/arm/arm/syscall.c
--- a/sys/arch/arm/arm/syscall.c Wed Jan 29 18:42:14 2014 +0000
+++ b/sys/arch/arm/arm/syscall.c Wed Jan 29 18:45:20 2014 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: syscall.c,v 1.58 2013/08/18 06:28:18 matt Exp $ */
+/* $NetBSD: syscall.c,v 1.59 2014/01/29 18:45:21 matt Exp $ */
/*-
* Copyright (c) 2000, 2003 The NetBSD Foundation, Inc.
@@ -71,7 +71,7 @@
#include <sys/param.h>
-__KERNEL_RCSID(0, "$NetBSD: syscall.c,v 1.58 2013/08/18 06:28:18 matt Exp $");
+__KERNEL_RCSID(0, "$NetBSD: syscall.c,v 1.59 2014/01/29 18:45:21 matt Exp $");
#include <sys/cpu.h>
#include <sys/device.h>
@@ -148,14 +148,10 @@
else
#endif
{
- /* XXX fuword? */
#ifdef __PROG32
- insn = *(uint32_t *)(tf->tf_pc - INSN_SIZE);
-#if defined(__ARMEB__) && defined(_ARM_ARCH_7)
- insn = le32toh(insn); /* BE armv7 insn are in LE */
-#endif
+ insn = read_insn(tf->tf_pc - INSN_SIZE, true);
#else
- insn = *(uint32_t *)((tf->tf_r15 & R15_PC) - INSN_SIZE);
+ insn = read_insn((tf->tf_r15 & R15_PC) - INSN_SIZE, true);
#endif
}
diff -r e02b4cd2957e -r bcdff0750c61 sys/arch/arm/arm/undefined.c
--- a/sys/arch/arm/arm/undefined.c Wed Jan 29 18:42:14 2014 +0000
+++ b/sys/arch/arm/arm/undefined.c Wed Jan 29 18:45:20 2014 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: undefined.c,v 1.50 2013/08/18 08:08:15 matt Exp $ */
+/* $NetBSD: undefined.c,v 1.51 2014/01/29 18:45:21 matt Exp $ */
/*
* Copyright (c) 2001 Ben Harris.
@@ -54,7 +54,7 @@
#include <sys/kgdb.h>
#endif
-__KERNEL_RCSID(0, "$NetBSD: undefined.c,v 1.50 2013/08/18 08:08:15 matt Exp $");
+__KERNEL_RCSID(0, "$NetBSD: undefined.c,v 1.51 2014/01/29 18:45:21 matt Exp $");
#include <sys/kmem.h>
#include <sys/queue.h>
@@ -303,17 +303,10 @@
#ifdef THUMB_CODE
if (frame->tf_spsr & PSR_T_bit) {
- const uint16_t * const pc = (const uint16_t *)(fault_pc & ~1);
- fault_instruction = pc[0];
-#if defined(__ARMEB__) && defined(_ARM_ARCH_7)
- fault_instruction = le16toh(fault_instruction);
-#endif
+ fault_instruction = read_thumb_insn(fault_pc, user);
if (fault_instruction >= 0xe000) {
- uint16_t tmp = pc[1];
-#if defined(__ARMEB__) && defined(_ARM_ARCH_7)
- tmp = le16toh(tmp);
-#endif
- fault_instruction = (fault_instruction << 16) | tmp;
+ fault_instruction = (fault_instruction << 16)
+ | read_thumb_insn(fault_pc + 2, user);
}
}
else
@@ -342,11 +335,7 @@
* the kernel is screwed up in which case it does
* not really matter does it ?
*/
-
- fault_instruction = *(const uint32_t *)fault_pc;
-#if defined(__ARMEB__) && defined(_ARM_ARCH_7)
- fault_instruction = le32toh(fault_instruction);
-#endif
+ fault_instruction = read_insn(fault_pc, user);
}
/* Update vmmeter statistics */
diff -r e02b4cd2957e -r bcdff0750c61 sys/arch/arm/arm32/fault.c
--- a/sys/arch/arm/arm32/fault.c Wed Jan 29 18:42:14 2014 +0000
+++ b/sys/arch/arm/arm32/fault.c Wed Jan 29 18:45:20 2014 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: fault.c,v 1.92 2014/01/11 17:32:20 matt Exp $ */
+/* $NetBSD: fault.c,v 1.93 2014/01/29 18:45:21 matt 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 1.92 2014/01/11 17:32:20 matt Exp $");
+__KERNEL_RCSID(0, "$NetBSD: fault.c,v 1.93 2014/01/29 18:45:21 matt Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -168,8 +168,23 @@
#endif
static inline void
-call_trapsignal(struct lwp *l, ksiginfo_t *ksi)
+call_trapsignal(struct lwp *l, const struct trapframe *tf, ksiginfo_t *ksi)
{
+ if (l->l_proc->p_pid == 1 || cpu_printfataltraps) {
+ printf("%d.%d(%s): trap: signo=%d code=%d addr=%p trap=%#x\n",
+ l->l_proc->p_pid, l->l_lid, l->l_proc->p_comm,
+ ksi->ksi_signo, ksi->ksi_code, ksi->ksi_addr,
+ ksi->ksi_trap);
+ printf("r0=%08x r1=%08x r2=%08x r3=%08x\n",
+ tf->tf_r0, tf->tf_r1, tf->tf_r2, tf->tf_r3);
+ printf("r4=%08x r5=%08x r6=%08x r7=%08x\n",
+ tf->tf_r4, tf->tf_r5, tf->tf_r6, tf->tf_r7);
+ printf("r8=%08x r9=%08x rA=%08x rB=%08x\n",
+ tf->tf_r8, tf->tf_r9, tf->tf_r10, tf->tf_r11);
+ printf("ip=%08x sp=%08x lr=%08x pc=%08x spsr=%08x\n",
+ tf->tf_r12, tf->tf_usr_sp, tf->tf_usr_lr, tf->tf_pc,
+ tf->tf_spsr);
+ }
TRAPSIGNAL(l, ksi);
}
@@ -360,7 +375,7 @@
if (!user && (va >= VM_MIN_KERNEL_ADDRESS ||
(va < VM_MIN_ADDRESS && vector_page == ARM_VECTORS_LOW)) &&
__predict_true((pcb->pcb_onfault == NULL ||
- (ReadWord(tf->tf_pc) & 0x05200000) != 0x04200000))) {
+ (read_insn(tf->tf_pc, false) & 0x05200000) != 0x04200000))) {
map = kernel_map;
/* Was the fault due to the FPE/IPKDB ? */
@@ -402,7 +417,7 @@
#ifdef THUMB_CODE
/* Fast track the ARM case. */
if (__predict_false(tf->tf_spsr & PSR_T_bit)) {
- u_int insn = fusword((void *)(tf->tf_pc & ~1));
+ u_int insn = read_thumb_insn(tf->tf_pc, user);
u_int insn_f8 = insn & 0xf800;
u_int insn_fe = insn & 0xfe00;
@@ -421,7 +436,7 @@
else
#endif
{
- u_int insn = ReadWord(tf->tf_pc);
+ u_int insn = read_insn(tf->tf_pc, user);
if (((insn & 0x0c100000) == 0x04000000) || /* STR[B] */
((insn & 0x0e1000b0) == 0x000000b0) || /* STR[HD]*/
@@ -499,21 +514,7 @@
UVMHIST_LOG(maphist, " <- error (%d)", error, 0, 0, 0);
do_trapsignal:
- if (l->l_proc->p_pid == 1 || cpu_printfataltraps) {
- printf("%d.%d(%s): trap: signo=%d code=%d addr=%p trap=%#x\n",
- l->l_proc->p_pid, l->l_lid, l->l_proc->p_comm,
- ksi.ksi_signo, ksi.ksi_code, ksi.ksi_addr, ksi.ksi_trap);
- printf("r0=%08x r1=%08x r2=%08x r3=%08x\n",
- tf->tf_r0, tf->tf_r1, tf->tf_r2, tf->tf_r3);
- printf("r4=%08x r5=%08x r6=%08x r7=%08x\n",
- tf->tf_r4, tf->tf_r5, tf->tf_r6, tf->tf_r7);
- printf("r8=%08x r9=%08x rA=%08x rB=%08x\n",
- tf->tf_r8, tf->tf_r9, tf->tf_r10, tf->tf_r11);
- printf("ip=%08x sp=%08x lr=%08x pc=%08x spsr=%08x\n",
- tf->tf_r12, tf->tf_usr_sp, tf->tf_usr_lr, tf->tf_pc,
- tf->tf_spsr);
- }
- call_trapsignal(l, &ksi);
+ call_trapsignal(l, tf, &ksi);
out:
/* If returning to user mode, make sure to invoke userret() */
if (user)
@@ -880,7 +881,7 @@
ksi.ksi_trap = fault_pc;
do_trapsignal:
- call_trapsignal(l, &ksi);
+ call_trapsignal(l, tf, &ksi);
out:
KASSERT(!TRAP_USERMODE(tf) || (tf->tf_spsr & IF32_bits) == 0);
diff -r e02b4cd2957e -r bcdff0750c61 sys/arch/arm/include/locore.h
--- a/sys/arch/arm/include/locore.h Wed Jan 29 18:42:14 2014 +0000
+++ b/sys/arch/arm/include/locore.h Wed Jan 29 18:45:20 2014 +0000
@@ -170,6 +170,42 @@
#define CPU_IS_ARMV6_P() true
#endif
+/*
+ * User by the fault code to read the current instruction.
+ */
+static inline uint32_t
+read_insn(vaddr_t va, bool user_p)
+{
+ uint32_t insn;
+ if (user_p) {
+ __asm __volatile("ldrt %0, [%1]" : "=&r"(insn) : "r"(va));
+ } else {
+ insn = *(const uint32_t *)va;
+ }
+#if defined(__ARMEB__) && defined(_ARM_ARCH_7)
+ insn = bswap32(insn);
+#endif
+ return insn;
+}
+
+/*
+ * User by the fault code to read the current thumb instruction.
+ */
+static inline uint32_t
+read_thumb_insn(vaddr_t va, bool user_p)
+{
+ va &= ~1;
+ uint32_t insn;
+ if (user_p) {
+ __asm __volatile("ldrht %0, [%1]" : "=&r"(insn) : "r"(va));
+ } else {
+ insn = *(const uint16_t *)va;
+ }
+#if defined(__ARMEB__) && defined(_ARM_ARCH_7)
+ insn = bswap16(insn);
+#endif
+ return insn;
+}
/*
* Random cruft
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