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-rw-r--r--arch/arm/kernel/Makefile4
-rw-r--r--arch/arm/kernel/ecard.c31
-rw-r--r--arch/arm/kernel/ecard.h56
-rw-r--r--arch/arm/kernel/head-nommu.S2
-rw-r--r--arch/arm/kernel/head.S8
-rw-r--r--arch/arm/kernel/init_task.c2
-rw-r--r--arch/arm/kernel/irq.c3
-rw-r--r--arch/arm/kernel/module.c4
-rw-r--r--arch/arm/kernel/process.c4
-rw-r--r--arch/arm/kernel/ptrace.c22
-rw-r--r--arch/arm/kernel/ptrace.h39
-rw-r--r--arch/arm/kernel/signal.c22
-rw-r--r--arch/arm/kernel/smp.c4
-rw-r--r--arch/arm/kernel/stacktrace.c73
-rw-r--r--arch/arm/kernel/stacktrace.h9
-rw-r--r--arch/arm/kernel/time.c4
-rw-r--r--arch/arm/kernel/traps.c38
-rw-r--r--arch/arm/kernel/vmlinux.lds.S17
18 files changed, 265 insertions, 77 deletions
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index bb28087bf818..593b56509f4f 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -7,8 +7,8 @@ AFLAGS_head.o := -DTEXT_OFFSET=$(TEXT_OFFSET)
# Object file lists.
obj-y := compat.o entry-armv.o entry-common.o irq.o \
- process.o ptrace.o semaphore.o setup.o signal.o sys_arm.o \
- time.o traps.o
+ process.o ptrace.o semaphore.o setup.o signal.o \
+ sys_arm.o stacktrace.o time.o traps.o
obj-$(CONFIG_ISA_DMA_API) += dma.o
obj-$(CONFIG_ARCH_ACORN) += ecard.o
diff --git a/arch/arm/kernel/ecard.c b/arch/arm/kernel/ecard.c
index f1c0fb974177..bdbd7da99286 100644
--- a/arch/arm/kernel/ecard.c
+++ b/arch/arm/kernel/ecard.c
@@ -40,6 +40,7 @@
#include <linux/device.h>
#include <linux/init.h>
#include <linux/mutex.h>
+#include <linux/kthread.h>
#include <asm/dma.h>
#include <asm/ecard.h>
@@ -50,6 +51,8 @@
#include <asm/mach/irq.h>
#include <asm/tlbflush.h>
+#include "ecard.h"
+
#ifndef CONFIG_ARCH_RPC
#define HAVE_EXPMASK
#endif
@@ -123,7 +126,7 @@ static void ecard_task_reset(struct ecard_request *req)
res = ec->slot_no == 8
? &ec->resource[ECARD_RES_MEMC]
- : ec->type == ECARD_EASI
+ : ec->easi
? &ec->resource[ECARD_RES_EASI]
: &ec->resource[ECARD_RES_IOCSYNC];
@@ -178,7 +181,7 @@ static void ecard_task_readbytes(struct ecard_request *req)
index += 1;
}
} else {
- unsigned long base = (ec->type == ECARD_EASI
+ unsigned long base = (ec->easi
? &ec->resource[ECARD_RES_EASI]
: &ec->resource[ECARD_RES_IOCSYNC])->start;
void __iomem *pbase = (void __iomem *)base;
@@ -263,8 +266,6 @@ static int ecard_init_mm(void)
static int
ecard_task(void * unused)
{
- daemonize("kecardd");
-
/*
* Allocate a mm. We're not a lazy-TLB kernel task since we need
* to set page table entries where the user space would be. Note
@@ -727,7 +728,7 @@ static int ecard_prints(char *buffer, ecard_t *ec)
char *start = buffer;
buffer += sprintf(buffer, " %d: %s ", ec->slot_no,
- ec->type == ECARD_EASI ? "EASI" : " ");
+ ec->easi ? "EASI" : " ");
if (ec->cid.id == 0) {
struct in_chunk_dir incd;
@@ -814,7 +815,7 @@ static struct expansion_card *__init ecard_alloc_card(int type, int slot)
}
ec->slot_no = slot;
- ec->type = type;
+ ec->easi = type == ECARD_EASI;
ec->irq = NO_IRQ;
ec->fiq = NO_IRQ;
ec->dma = NO_DMA;
@@ -825,6 +826,7 @@ static struct expansion_card *__init ecard_alloc_card(int type, int slot)
ec->dev.bus = &ecard_bus_type;
ec->dev.dma_mask = &ec->dma_mask;
ec->dma_mask = (u64)0xffffffff;
+ ec->dev.coherent_dma_mask = ec->dma_mask;
if (slot < 4) {
ec_set_resource(ec, ECARD_RES_MEMC,
@@ -907,7 +909,7 @@ static ssize_t ecard_show_device(struct device *dev, struct device_attribute *at
static ssize_t ecard_show_type(struct device *dev, struct device_attribute *attr, char *buf)
{
struct expansion_card *ec = ECARD_DEV(dev);
- return sprintf(buf, "%s\n", ec->type == ECARD_EASI ? "EASI" : "IOC");
+ return sprintf(buf, "%s\n", ec->easi ? "EASI" : "IOC");
}
static struct device_attribute ecard_dev_attrs[] = {
@@ -1058,13 +1060,14 @@ ecard_probe(int slot, card_type_t type)
*/
static int __init ecard_init(void)
{
- int slot, irqhw, ret;
-
- ret = kernel_thread(ecard_task, NULL, CLONE_KERNEL);
- if (ret < 0) {
- printk(KERN_ERR "Ecard: unable to create kernel thread: %d\n",
- ret);
- return ret;
+ struct task_struct *task;
+ int slot, irqhw;
+
+ task = kthread_run(ecard_task, NULL, "kecardd");
+ if (IS_ERR(task)) {
+ printk(KERN_ERR "Ecard: unable to create kernel thread: %ld\n",
+ PTR_ERR(task));
+ return PTR_ERR(task);
}
printk("Probing expansion cards\n");
diff --git a/arch/arm/kernel/ecard.h b/arch/arm/kernel/ecard.h
new file mode 100644
index 000000000000..d7c2dacf935d
--- /dev/null
+++ b/arch/arm/kernel/ecard.h
@@ -0,0 +1,56 @@
+/*
+ * ecard.h
+ *
+ * Copyright 2007 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/* Definitions internal to ecard.c - for it's use only!!
+ *
+ * External expansion card header as read from the card
+ */
+struct ex_ecid {
+ unsigned char r_irq:1;
+ unsigned char r_zero:1;
+ unsigned char r_fiq:1;
+ unsigned char r_id:4;
+ unsigned char r_a:1;
+
+ unsigned char r_cd:1;
+ unsigned char r_is:1;
+ unsigned char r_w:2;
+ unsigned char r_r1:4;
+
+ unsigned char r_r2:8;
+
+ unsigned char r_prod[2];
+
+ unsigned char r_manu[2];
+
+ unsigned char r_country;
+
+ unsigned char r_fiqmask;
+ unsigned char r_fiqoff[3];
+
+ unsigned char r_irqmask;
+ unsigned char r_irqoff[3];
+};
+
+/*
+ * Chunk directory entry as read from the card
+ */
+struct ex_chunk_dir {
+ unsigned char r_id;
+ unsigned char r_len[3];
+ unsigned long r_start;
+ union {
+ char string[256];
+ char data[1];
+ } d;
+#define c_id(x) ((x)->r_id)
+#define c_len(x) ((x)->r_len[0]|((x)->r_len[1]<<8)|((x)->r_len[2]<<16))
+#define c_start(x) ((x)->r_start)
+};
diff --git a/arch/arm/kernel/head-nommu.S b/arch/arm/kernel/head-nommu.S
index 0119c0d5f978..5d78ffb8a9a7 100644
--- a/arch/arm/kernel/head-nommu.S
+++ b/arch/arm/kernel/head-nommu.S
@@ -33,7 +33,7 @@
* numbers for r1.
*
*/
- __INIT
+ .section ".text.head", "ax"
.type stext, %function
ENTRY(stext)
msr cpsr_c, #PSR_F_BIT | PSR_I_BIT | SVC_MODE @ ensure svc mode
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index 66db0a9bf0bc..41f98b4ba2ee 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -73,7 +73,7 @@
* crap here - that's what the boot loader (or in extreme, well justified
* circumstances, zImage) is for.
*/
- __INIT
+ .section ".text.head", "ax"
.type stext, %function
ENTRY(stext)
msr cpsr_c, #PSR_F_BIT | PSR_I_BIT | SVC_MODE @ ensure svc mode
@@ -257,7 +257,9 @@ __create_page_tables:
* Map some ram to cover our .data and .bss areas.
*/
orr r3, r7, #(KERNEL_RAM_PADDR & 0xff000000)
+ .if (KERNEL_RAM_PADDR & 0x00f00000)
orr r3, r3, #(KERNEL_RAM_PADDR & 0x00f00000)
+ .endif
add r0, r4, #(KERNEL_RAM_VADDR & 0xff000000) >> 18
str r3, [r0, #(KERNEL_RAM_VADDR & 0x00f00000) >> 18]!
ldr r6, =(_end - 1)
@@ -274,7 +276,9 @@ __create_page_tables:
*/
add r0, r4, #PAGE_OFFSET >> 18
orr r6, r7, #(PHYS_OFFSET & 0xff000000)
- orr r6, r6, #(PHYS_OFFSET & 0x00e00000)
+ .if (PHYS_OFFSET & 0x00f00000)
+ orr r6, r6, #(PHYS_OFFSET & 0x00f00000)
+ .endif
str r6, [r0]
#ifdef CONFIG_DEBUG_LL
diff --git a/arch/arm/kernel/init_task.c b/arch/arm/kernel/init_task.c
index a00cca0000bd..bd4ef53bc6b9 100644
--- a/arch/arm/kernel/init_task.c
+++ b/arch/arm/kernel/init_task.c
@@ -31,7 +31,7 @@ EXPORT_SYMBOL(init_mm);
* The things we do for performance..
*/
union thread_union init_thread_union
- __attribute__((__section__(".init.task"))) =
+ __attribute__((__section__(".data.init_task"))) =
{ INIT_THREAD_INFO(init_task) };
/*
diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c
index e101846ab7dd..11dcd52e51be 100644
--- a/arch/arm/kernel/irq.c
+++ b/arch/arm/kernel/irq.c
@@ -27,7 +27,6 @@
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
-#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/random.h>
#include <linux/smp.h>
@@ -109,7 +108,7 @@ static struct irq_desc bad_irq_desc = {
* come via this function. Instead, they should provide their
* own 'handler'
*/
-asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs)
+asmlinkage void __exception asm_do_IRQ(unsigned int irq, struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
struct irq_desc *desc = irq_desc + irq;
diff --git a/arch/arm/kernel/module.c b/arch/arm/kernel/module.c
index 1b061583408e..79b7e5cf5416 100644
--- a/arch/arm/kernel/module.c
+++ b/arch/arm/kernel/module.c
@@ -116,8 +116,8 @@ apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
offset += sym->st_value - loc;
if (offset & 3 ||
- offset <= (s32)0xfc000000 ||
- offset >= (s32)0x04000000) {
+ offset <= (s32)0xfe000000 ||
+ offset >= (s32)0x02000000) {
printk(KERN_ERR
"%s: relocation out of range, section "
"%d reloc %d sym '%s'\n", module->name,
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 782af3cb213f..5d6e6523598b 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -16,7 +16,6 @@
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
-#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/user.h>
#include <linux/a.out.h>
@@ -28,6 +27,7 @@
#include <linux/cpu.h>
#include <linux/elfcore.h>
#include <linux/pm.h>
+#include <linux/tick.h>
#include <asm/leds.h>
#include <asm/processor.h>
@@ -160,9 +160,11 @@ void cpu_idle(void)
if (!idle)
idle = default_idle;
leds_event(led_idle_start);
+ tick_nohz_stop_sched_tick();
while (!need_resched())
idle();
leds_event(led_idle_end);
+ tick_nohz_restart_sched_tick();
preempt_enable_no_resched();
schedule();
preempt_disable();
diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c
index 9254ba2f46fc..6f2f46c2e406 100644
--- a/arch/arm/kernel/ptrace.c
+++ b/arch/arm/kernel/ptrace.c
@@ -13,7 +13,6 @@
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/smp.h>
-#include <linux/smp_lock.h>
#include <linux/ptrace.h>
#include <linux/user.h>
#include <linux/security.h>
@@ -457,13 +456,10 @@ void ptrace_cancel_bpt(struct task_struct *child)
/*
* Called by kernel/ptrace.c when detaching..
- *
- * Make sure the single step bit is not set.
*/
void ptrace_disable(struct task_struct *child)
{
- child->ptrace &= ~PT_SINGLESTEP;
- ptrace_cancel_bpt(child);
+ single_step_disable(child);
}
/*
@@ -712,9 +708,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
else
clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
child->exit_code = data;
- /* make sure single-step breakpoint is gone. */
- child->ptrace &= ~PT_SINGLESTEP;
- ptrace_cancel_bpt(child);
+ single_step_disable(child);
wake_up_process(child);
ret = 0;
break;
@@ -725,9 +719,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
* exit.
*/
case PTRACE_KILL:
- /* make sure single-step breakpoint is gone. */
- child->ptrace &= ~PT_SINGLESTEP;
- ptrace_cancel_bpt(child);
+ single_step_disable(child);
if (child->exit_state != EXIT_ZOMBIE) {
child->exit_code = SIGKILL;
wake_up_process(child);
@@ -742,7 +734,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
ret = -EIO;
if (!valid_signal(data))
break;
- child->ptrace |= PT_SINGLESTEP;
+ single_step_enable(child);
clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
child->exit_code = data;
/* give it a chance to run. */
@@ -786,8 +778,8 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
break;
case PTRACE_SET_SYSCALL:
+ task_thread_info(child)->syscall = data;
ret = 0;
- child->ptrace_message = data;
break;
#ifdef CONFIG_CRUNCH
@@ -824,7 +816,7 @@ asmlinkage int syscall_trace(int why, struct pt_regs *regs, int scno)
ip = regs->ARM_ip;
regs->ARM_ip = why;
- current->ptrace_message = scno;
+ current_thread_info()->syscall = scno;
/* the 0x80 provides a way for the tracing parent to distinguish
between a syscall stop and SIGTRAP delivery */
@@ -841,5 +833,5 @@ asmlinkage int syscall_trace(int why, struct pt_regs *regs, int scno)
}
regs->ARM_ip = ip;
- return current->ptrace_message;
+ return current_thread_info()->syscall;
}
diff --git a/arch/arm/kernel/ptrace.h b/arch/arm/kernel/ptrace.h
index f7cad13a22e9..def3b6184a79 100644
--- a/arch/arm/kernel/ptrace.h
+++ b/arch/arm/kernel/ptrace.h
@@ -7,6 +7,45 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
+#include <linux/ptrace.h>
+
extern void ptrace_cancel_bpt(struct task_struct *);
extern void ptrace_set_bpt(struct task_struct *);
extern void ptrace_break(struct task_struct *, struct pt_regs *);
+
+/*
+ * make sure single-step breakpoint is gone.
+ */
+static inline void single_step_disable(struct task_struct *task)
+{
+ task->ptrace &= ~PT_SINGLESTEP;
+ ptrace_cancel_bpt(task);
+}
+
+static inline void single_step_enable(struct task_struct *task)
+{
+ task->ptrace |= PT_SINGLESTEP;
+}
+
+/*
+ * Send SIGTRAP if we're single-stepping
+ */
+static inline void single_step_trap(struct task_struct *task)
+{
+ if (task->ptrace & PT_SINGLESTEP) {
+ ptrace_cancel_bpt(task);
+ send_sig(SIGTRAP, task, 1);
+ }
+}
+
+static inline void single_step_clear(struct task_struct *task)
+{
+ if (task->ptrace & PT_SINGLESTEP)
+ ptrace_cancel_bpt(task);
+}
+
+static inline void single_step_set(struct task_struct *task)
+{
+ if (task->ptrace & PT_SINGLESTEP)
+ ptrace_set_bpt(task);
+}
diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c
index 3843d3bab2dd..54cdf1aeefc3 100644
--- a/arch/arm/kernel/signal.c
+++ b/arch/arm/kernel/signal.c
@@ -9,7 +9,6 @@
*/
#include <linux/errno.h>
#include <linux/signal.h>
-#include <linux/ptrace.h>
#include <linux/personality.h>
#include <linux/freezer.h>
@@ -285,11 +284,7 @@ asmlinkage int sys_sigreturn(struct pt_regs *regs)
if (restore_sigframe(regs, frame))
goto badframe;
- /* Send SIGTRAP if we're single-stepping */
- if (current->ptrace & PT_SINGLESTEP) {
- ptrace_cancel_bpt(current);
- send_sig(SIGTRAP, current, 1);
- }
+ single_step_trap(current);
return regs->ARM_r0;
@@ -324,11 +319,7 @@ asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
if (do_sigaltstack(&frame->sig.uc.uc_stack, NULL, regs->ARM_sp) == -EFAULT)
goto badframe;
- /* Send SIGTRAP if we're single-stepping */
- if (current->ptrace & PT_SINGLESTEP) {
- ptrace_cancel_bpt(current);
- send_sig(SIGTRAP, current, 1);
- }
+ single_step_trap(current);
return regs->ARM_r0;
@@ -644,14 +635,12 @@ static int do_signal(sigset_t *oldset, struct pt_regs *regs, int syscall)
if (try_to_freeze())
goto no_signal;
- if (current->ptrace & PT_SINGLESTEP)
- ptrace_cancel_bpt(current);
+ single_step_clear(current);
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
if (signr > 0) {
handle_signal(signr, &ka, &info, oldset, regs, syscall);
- if (current->ptrace & PT_SINGLESTEP)
- ptrace_set_bpt(current);
+ single_step_set(current);
return 1;
}
@@ -705,8 +694,7 @@ static int do_signal(sigset_t *oldset, struct pt_regs *regs, int syscall)
restart_syscall(regs);
}
}
- if (current->ptrace & PT_SINGLESTEP)
- ptrace_set_bpt(current);
+ single_step_set(current);
return 0;
}
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 070bcb7a6306..1b76d87fa335 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -486,7 +486,7 @@ static void ipi_timer(void)
}
#ifdef CONFIG_LOCAL_TIMERS
-asmlinkage void do_local_timer(struct pt_regs *regs)
+asmlinkage void __exception do_local_timer(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
int cpu = smp_processor_id();
@@ -551,7 +551,7 @@ static void ipi_cpu_stop(unsigned int cpu)
*
* Bit 0 - Inter-processor function call
*/
-asmlinkage void do_IPI(struct pt_regs *regs)
+asmlinkage void __exception do_IPI(struct pt_regs *regs)
{
unsigned int cpu = smp_processor_id();
struct ipi_data *ipi = &per_cpu(ipi_data, cpu);
diff --git a/arch/arm/kernel/stacktrace.c b/arch/arm/kernel/stacktrace.c
new file mode 100644
index 000000000000..77ef35efaa8d
--- /dev/null
+++ b/arch/arm/kernel/stacktrace.c
@@ -0,0 +1,73 @@
+#include <linux/sched.h>
+#include <linux/stacktrace.h>
+
+#include "stacktrace.h"
+
+int walk_stackframe(unsigned long fp, unsigned long low, unsigned long high,
+ int (*fn)(struct stackframe *, void *), void *data)
+{
+ struct stackframe *frame;
+
+ do {
+ /*
+ * Check current frame pointer is within bounds
+ */
+ if ((fp - 12) < low || fp + 4 >= high)
+ break;
+
+ frame = (struct stackframe *)(fp - 12);
+
+ if (fn(frame, data))
+ break;
+
+ /*
+ * Update the low bound - the next frame must always
+ * be at a higher address than the current frame.
+ */
+ low = fp + 4;
+ fp = frame->fp;
+ } while (fp);
+
+ return 0;
+}
+
+#ifdef CONFIG_STACKTRACE
+struct stack_trace_data {
+ struct stack_trace *trace;
+ unsigned int skip;
+};
+
+static int save_trace(struct stackframe *frame, void *d)
+{
+ struct stack_trace_data *data = d;
+ struct stack_trace *trace = data->trace;
+
+ if (data->skip) {
+ data->skip--;
+ return 0;
+ }
+
+ trace->entries[trace->nr_entries++] = frame->lr;
+
+ return trace->nr_entries >= trace->max_entries;
+}
+
+void save_stack_trace(struct stack_trace *trace, struct task_struct *task)
+{
+ struct stack_trace_data data;
+ unsigned long fp, base;
+
+ data.trace = trace;
+ data.skip = trace->skip;
+
+ if (task) {
+ base = (unsigned long)task_stack_page(task);
+ fp = 0; /* FIXME */
+ } else {
+ base = (unsigned long)task_stack_page(current);
+ asm("mov %0, fp" : "=r" (fp));
+ }
+
+ walk_stackframe(fp, base, base + THREAD_SIZE, save_trace, &data);
+}
+#endif
diff --git a/arch/arm/kernel/stacktrace.h b/arch/arm/kernel/stacktrace.h
new file mode 100644
index 000000000000..e9fd20cb5662
--- /dev/null
+++ b/arch/arm/kernel/stacktrace.h
@@ -0,0 +1,9 @@
+struct stackframe {
+ unsigned long fp;
+ unsigned long sp;
+ unsigned long lr;
+ unsigned long pc;
+};
+
+int walk_stackframe(unsigned long fp, unsigned long low, unsigned long high,
+ int (*fn)(struct stackframe *, void *), void *data);
diff --git a/arch/arm/kernel/time.c b/arch/arm/kernel/time.c
index f61decb89ba2..d0540e4eaf5b 100644
--- a/arch/arm/kernel/time.c
+++ b/arch/arm/kernel/time.c
@@ -327,6 +327,7 @@ void restore_time_delta(struct timespec *delta, struct timespec *rtc)
}
EXPORT_SYMBOL(restore_time_delta);
+#ifndef CONFIG_GENERIC_CLOCKEVENTS
/*
* Kernel system timer support.
*/
@@ -340,8 +341,9 @@ void timer_tick(void)
update_process_times(user_mode(get_irq_regs()));
#endif
}
+#endif
-#ifdef CONFIG_PM
+#if defined(CONFIG_PM) && !defined(CONFIG_GENERIC_CLOCKEVENTS)
static int timer_suspend(struct sys_device *dev, pm_message_t state)
{
struct sys_timer *timer = container_of(dev, struct sys_timer, dev);
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index 24095601359b..10ff36e4e414 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -16,7 +16,6 @@
#include <linux/signal.h>
#include <linux/spinlock.h>
#include <linux/personality.h>
-#include <linux/ptrace.h>
#include <linux/kallsyms.h>
#include <linux/delay.h>
#include <linux/init.h>
@@ -45,7 +44,18 @@ static int __init user_debug_setup(char *str)
__setup("user_debug=", user_debug_setup);
#endif
-void dump_backtrace_entry(unsigned long where, unsigned long from)
+static void dump_mem(const char *str, unsigned long bottom, unsigned long top);
+
+static inline int in_exception_text(unsigned long ptr)
+{
+ extern char __exception_text_start[];
+ extern char __exception_text_end[];
+
+ return ptr >= (unsigned long)&__exception_text_start &&
+ ptr < (unsigned long)&__exception_text_end;
+}
+
+void dump_backtrace_entry(unsigned long where, unsigned long from, unsigned long frame)
{
#ifdef CONFIG_KALLSYMS
printk("[<%08lx>] ", where);
@@ -55,6 +65,9 @@ void dump_backtrace_entry(unsigned long where, unsigned long from)
#else
printk("Function entered at [<%08lx>] from [<%08lx>]\n", where, from);
#endif
+
+ if (in_exception_text(where))
+ dump_mem("Exception stack", frame + 4, frame + 4 + sizeof(struct pt_regs));
}
/*
@@ -232,8 +245,8 @@ NORET_TYPE void die(const char *str, struct pt_regs *regs, int err)
do_exit(SIGSEGV);
}
-void notify_die(const char *str, struct pt_regs *regs, struct siginfo *info,
- unsigned long err, unsigned long trap)
+void arm_notify_die(const char *str, struct pt_regs *regs,
+ struct siginfo *info, unsigned long err, unsigned long trap)
{
if (user_mode(regs)) {
current->thread.error_code = err;
@@ -266,13 +279,14 @@ void unregister_undef_hook(struct undef_hook *hook)
spin_unlock_irqrestore(&undef_lock, flags);
}
-asmlinkage void do_undefinstr(struct pt_regs *regs)
+asmlinkage void __exception do_undefinstr(struct pt_regs *regs)
{
unsigned int correction = thumb_mode(regs) ? 2 : 4;
unsigned int instr;
struct undef_hook *hook;
siginfo_t info;
void __user *pc;
+ unsigned long flags;
/*
* According to the ARM ARM, PC is 2 or 4 bytes ahead,
@@ -291,7 +305,7 @@ asmlinkage void do_undefinstr(struct pt_regs *regs)
get_user(instr, (u32 __user *)pc);
}
- spin_lock_irq(&undef_lock);
+ spin_lock_irqsave(&undef_lock, flags);
list_for_each_entry(hook, &undef_hook, node) {
if ((instr & hook->instr_mask) == hook->instr_val &&
(regs->ARM_cpsr & hook->cpsr_mask) == hook->cpsr_val) {
@@ -301,7 +315,7 @@ asmlinkage void do_undefinstr(struct pt_regs *regs)
}
}
}
- spin_unlock_irq(&undef_lock);
+ spin_unlock_irqrestore(&undef_lock, flags);
#ifdef CONFIG_DEBUG_USER
if (user_debug & UDBG_UNDEFINED) {
@@ -316,7 +330,7 @@ asmlinkage void do_undefinstr(struct pt_regs *regs)
info.si_code = ILL_ILLOPC;
info.si_addr = pc;
- notify_die("Oops - undefined instruction", regs, &info, 0, 6);
+ arm_notify_die("Oops - undefined instruction", regs, &info, 0, 6);
}
asmlinkage void do_unexp_fiq (struct pt_regs *regs)
@@ -370,7 +384,7 @@ static int bad_syscall(int n, struct pt_regs *regs)
info.si_addr = (void __user *)instruction_pointer(regs) -
(thumb_mode(regs) ? 2 : 4);
- notify_die("Oops - bad syscall", regs, &info, n, 0);
+ arm_notify_die("Oops - bad syscall", regs, &info, n, 0);
return regs->ARM_r0;
}
@@ -414,7 +428,7 @@ asmlinkage int arm_syscall(int no, struct pt_regs *regs)
info.si_code = SEGV_MAPERR;
info.si_addr = NULL;
- notify_die("branch through zero", regs, &info, 0, 0);
+ arm_notify_die("branch through zero", regs, &info, 0, 0);
return 0;
case NR(breakpoint): /* SWI BREAK_POINT */
@@ -550,7 +564,7 @@ asmlinkage int arm_syscall(int no, struct pt_regs *regs)
info.si_addr = (void __user *)instruction_pointer(regs) -
(thumb_mode(regs) ? 2 : 4);
- notify_die("Oops - bad syscall(2)", regs, &info, no, 0);
+ arm_notify_die("Oops - bad syscall(2)", regs, &info, no, 0);
return 0;
}
@@ -624,7 +638,7 @@ baddataabort(int code, unsigned long instr, struct pt_regs *regs)
info.si_code = ILL_ILLOPC;
info.si_addr = (void __user *)addr;
- notify_die("unknown data abort code", regs, &info, instr, 0);
+ arm_notify_die("unknown data abort code", regs, &info, instr, 0);
}
void __attribute__((noreturn)) __bug(const char *file, int line)
diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S
index ddbdad48f5b2..e4156e7868ce 100644
--- a/arch/arm/kernel/vmlinux.lds.S
+++ b/arch/arm/kernel/vmlinux.lds.S
@@ -23,11 +23,15 @@ SECTIONS
#else
. = PAGE_OFFSET + TEXT_OFFSET;
#endif
- .init : { /* Init code and data */
+ .text.head : {
_stext = .;
- _sinittext = .;
+ _sinittext = .;
+ *(.text.head)
+ }
+
+ .init : { /* Init code and data */
*(.init.text)
- _einittext = .;
+ _einittext = .;
__proc_info_begin = .;
*(.proc.info.init)
__proc_info_end = .;
@@ -59,7 +63,7 @@ SECTIONS
usr/built-in.o(.init.ramfs)
__initramfs_end = .;
#endif
- . = ALIGN(64);
+ . = ALIGN(4096);
__per_cpu_start = .;
*(.data.percpu)
__per_cpu_end = .;
@@ -83,6 +87,9 @@ SECTIONS
.text : { /* Real text segment */
_text = .; /* Text and read-only data */
+ __exception_text_start = .;
+ *(.exception.text)
+ __exception_text_end = .;
*(.text)
SCHED_TEXT
LOCK_TEXT
@@ -116,7 +123,7 @@ SECTIONS
* first, the init task union, aligned
* to an 8192 byte boundary.
*/
- *(.init.task)
+ *(.data.init_task)
#ifdef CONFIG_XIP_KERNEL
. = ALIGN(4096);
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