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-rw-r--r--arch/sparc64/kernel/dtlb_prot.S2
-rw-r--r--arch/sparc64/kernel/ebus.c2
-rw-r--r--arch/sparc64/kernel/etrap.S2
-rw-r--r--arch/sparc64/kernel/idprom.c2
-rw-r--r--arch/sparc64/kernel/process.c153
-rw-r--r--arch/sparc64/kernel/rtrap.S3
-rw-r--r--arch/sparc64/kernel/sbus.c2
-rw-r--r--arch/sparc64/kernel/setup.c2
-rw-r--r--arch/sparc64/kernel/signal.c2
-rw-r--r--arch/sparc64/kernel/smp.c10
-rw-r--r--arch/sparc64/kernel/stacktrace.c12
-rw-r--r--arch/sparc64/kernel/starfire.c2
-rw-r--r--arch/sparc64/kernel/sys32.S2
-rw-r--r--arch/sparc64/kernel/trampoline.S2
-rw-r--r--arch/sparc64/kernel/traps.c12
-rw-r--r--arch/sparc64/kernel/unaligned.c2
16 files changed, 178 insertions, 34 deletions
diff --git a/arch/sparc64/kernel/dtlb_prot.S b/arch/sparc64/kernel/dtlb_prot.S
index e0a920162604..b2c2c5be281c 100644
--- a/arch/sparc64/kernel/dtlb_prot.S
+++ b/arch/sparc64/kernel/dtlb_prot.S
@@ -1,4 +1,4 @@
-/* $Id: dtlb_prot.S,v 1.22 2001/04/11 23:40:32 davem Exp $
+/*
* dtlb_prot.S: DTLB protection trap strategy.
* This is included directly into the trap table.
*
diff --git a/arch/sparc64/kernel/ebus.c b/arch/sparc64/kernel/ebus.c
index bc2632274840..c49d0388b793 100644
--- a/arch/sparc64/kernel/ebus.c
+++ b/arch/sparc64/kernel/ebus.c
@@ -1,4 +1,4 @@
-/* $Id: ebus.c,v 1.64 2001/11/08 04:41:33 davem Exp $
+/*
* ebus.c: PCI to EBus bridge device.
*
* Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
diff --git a/arch/sparc64/kernel/etrap.S b/arch/sparc64/kernel/etrap.S
index f25e1da3fd03..29ce489bc188 100644
--- a/arch/sparc64/kernel/etrap.S
+++ b/arch/sparc64/kernel/etrap.S
@@ -1,4 +1,4 @@
-/* $Id: etrap.S,v 1.46 2002/02/09 19:49:30 davem Exp $
+/*
* etrap.S: Preparing for entry into the kernel on Sparc V9.
*
* Copyright (C) 1996, 1997 David S. Miller (davem@caip.rutgers.edu)
diff --git a/arch/sparc64/kernel/idprom.c b/arch/sparc64/kernel/idprom.c
index 3b6789e09a72..5b45a808c621 100644
--- a/arch/sparc64/kernel/idprom.c
+++ b/arch/sparc64/kernel/idprom.c
@@ -1,4 +1,4 @@
-/* $Id: idprom.c,v 1.3 1999/08/31 06:54:53 davem Exp $
+/*
* idprom.c: Routines to load the idprom into kernel addresses and
* interpret the data contained within.
*
diff --git a/arch/sparc64/kernel/process.c b/arch/sparc64/kernel/process.c
index 4129c0449856..2084f81a76e1 100644
--- a/arch/sparc64/kernel/process.c
+++ b/arch/sparc64/kernel/process.c
@@ -1,6 +1,6 @@
/* arch/sparc64/kernel/process.c
*
- * Copyright (C) 1995, 1996 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 1995, 1996, 2008 David S. Miller (davem@davemloft.net)
* Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
* Copyright (C) 1997, 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
*/
@@ -30,6 +30,7 @@
#include <linux/init.h>
#include <linux/cpu.h>
#include <linux/elfcore.h>
+#include <linux/sysrq.h>
#include <asm/oplib.h>
#include <asm/uaccess.h>
@@ -49,6 +50,8 @@
#include <asm/sstate.h>
#include <asm/reboot.h>
#include <asm/syscalls.h>
+#include <asm/irq_regs.h>
+#include <asm/smp.h>
/* #define VERBOSE_SHOWREGS */
@@ -298,6 +301,118 @@ void show_regs(struct pt_regs *regs)
#endif
}
+#ifdef CONFIG_MAGIC_SYSRQ
+struct global_reg_snapshot global_reg_snapshot[NR_CPUS];
+static DEFINE_SPINLOCK(global_reg_snapshot_lock);
+
+static void __global_reg_self(struct thread_info *tp, struct pt_regs *regs,
+ int this_cpu)
+{
+ flushw_all();
+
+ global_reg_snapshot[this_cpu].tstate = regs->tstate;
+ global_reg_snapshot[this_cpu].tpc = regs->tpc;
+ global_reg_snapshot[this_cpu].tnpc = regs->tnpc;
+ global_reg_snapshot[this_cpu].o7 = regs->u_regs[UREG_I7];
+
+ if (regs->tstate & TSTATE_PRIV) {
+ struct reg_window *rw;
+
+ rw = (struct reg_window *)
+ (regs->u_regs[UREG_FP] + STACK_BIAS);
+ global_reg_snapshot[this_cpu].i7 = rw->ins[6];
+ } else
+ global_reg_snapshot[this_cpu].i7 = 0;
+
+ global_reg_snapshot[this_cpu].thread = tp;
+}
+
+/* In order to avoid hangs we do not try to synchronize with the
+ * global register dump client cpus. The last store they make is to
+ * the thread pointer, so do a short poll waiting for that to become
+ * non-NULL.
+ */
+static void __global_reg_poll(struct global_reg_snapshot *gp)
+{
+ int limit = 0;
+
+ while (!gp->thread && ++limit < 100) {
+ barrier();
+ udelay(1);
+ }
+}
+
+static void sysrq_handle_globreg(int key, struct tty_struct *tty)
+{
+ struct thread_info *tp = current_thread_info();
+ struct pt_regs *regs = get_irq_regs();
+#ifdef CONFIG_KALLSYMS
+ char buffer[KSYM_SYMBOL_LEN];
+#endif
+ unsigned long flags;
+ int this_cpu, cpu;
+
+ if (!regs)
+ regs = tp->kregs;
+
+ spin_lock_irqsave(&global_reg_snapshot_lock, flags);
+
+ memset(global_reg_snapshot, 0, sizeof(global_reg_snapshot));
+
+ this_cpu = raw_smp_processor_id();
+
+ __global_reg_self(tp, regs, this_cpu);
+
+ smp_fetch_global_regs();
+
+ for_each_online_cpu(cpu) {
+ struct global_reg_snapshot *gp = &global_reg_snapshot[cpu];
+ struct thread_info *tp;
+
+ __global_reg_poll(gp);
+
+ tp = gp->thread;
+ printk("%c CPU[%3d]: TSTATE[%016lx] TPC[%016lx] TNPC[%016lx] TASK[%s:%d]\n",
+ (cpu == this_cpu ? '*' : ' '), cpu,
+ gp->tstate, gp->tpc, gp->tnpc,
+ ((tp && tp->task) ? tp->task->comm : "NULL"),
+ ((tp && tp->task) ? tp->task->pid : -1));
+#ifdef CONFIG_KALLSYMS
+ if (gp->tstate & TSTATE_PRIV) {
+ sprint_symbol(buffer, gp->tpc);
+ printk(" TPC[%s] ", buffer);
+ sprint_symbol(buffer, gp->o7);
+ printk("O7[%s] ", buffer);
+ sprint_symbol(buffer, gp->i7);
+ printk("I7[%s]\n", buffer);
+ } else
+#endif
+ {
+ printk(" TPC[%lx] O7[%lx] I7[%lx]\n",
+ gp->tpc, gp->o7, gp->i7);
+ }
+ }
+
+ memset(global_reg_snapshot, 0, sizeof(global_reg_snapshot));
+
+ spin_unlock_irqrestore(&global_reg_snapshot_lock, flags);
+}
+
+static struct sysrq_key_op sparc_globalreg_op = {
+ .handler = sysrq_handle_globreg,
+ .help_msg = "Globalregs",
+ .action_msg = "Show Global CPU Regs",
+};
+
+static int __init sparc_globreg_init(void)
+{
+ return register_sysrq_key('y', &sparc_globalreg_op);
+}
+
+core_initcall(sparc_globreg_init);
+
+#endif
+
unsigned long thread_saved_pc(struct task_struct *tsk)
{
struct thread_info *ti = task_thread_info(tsk);
@@ -542,20 +657,39 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
struct task_struct *p, struct pt_regs *regs)
{
struct thread_info *t = task_thread_info(p);
+ struct sparc_stackf *parent_sf;
+ unsigned long child_stack_sz;
char *child_trap_frame;
+ int kernel_thread;
- /* Calculate offset to stack_frame & pt_regs */
- child_trap_frame = task_stack_page(p) + (THREAD_SIZE - (TRACEREG_SZ+STACKFRAME_SZ));
- memcpy(child_trap_frame, (((struct sparc_stackf *)regs)-1), (TRACEREG_SZ+STACKFRAME_SZ));
+ kernel_thread = (regs->tstate & TSTATE_PRIV) ? 1 : 0;
+ parent_sf = ((struct sparc_stackf *) regs) - 1;
- t->flags = (t->flags & ~((0xffUL << TI_FLAG_CWP_SHIFT) | (0xffUL << TI_FLAG_CURRENT_DS_SHIFT))) |
+ /* Calculate offset to stack_frame & pt_regs */
+ child_stack_sz = ((STACKFRAME_SZ + TRACEREG_SZ) +
+ (kernel_thread ? STACKFRAME_SZ : 0));
+ child_trap_frame = (task_stack_page(p) +
+ (THREAD_SIZE - child_stack_sz));
+ memcpy(child_trap_frame, parent_sf, child_stack_sz);
+
+ t->flags = (t->flags & ~((0xffUL << TI_FLAG_CWP_SHIFT) |
+ (0xffUL << TI_FLAG_CURRENT_DS_SHIFT))) |
(((regs->tstate + 1) & TSTATE_CWP) << TI_FLAG_CWP_SHIFT);
t->new_child = 1;
t->ksp = ((unsigned long) child_trap_frame) - STACK_BIAS;
- t->kregs = (struct pt_regs *)(child_trap_frame+sizeof(struct sparc_stackf));
+ t->kregs = (struct pt_regs *) (child_trap_frame +
+ sizeof(struct sparc_stackf));
t->fpsaved[0] = 0;
- if (regs->tstate & TSTATE_PRIV) {
+ if (kernel_thread) {
+ struct sparc_stackf *child_sf = (struct sparc_stackf *)
+ (child_trap_frame + (STACKFRAME_SZ + TRACEREG_SZ));
+
+ /* Zero terminate the stack backtrace. */
+ child_sf->fp = NULL;
+ t->kregs->u_regs[UREG_FP] =
+ ((unsigned long) child_sf) - STACK_BIAS;
+
/* Special case, if we are spawning a kernel thread from
* a userspace task (via KMOD, NFS, or similar) we must
* disable performance counters in the child because the
@@ -566,12 +700,7 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
t->pcr_reg = 0;
t->flags &= ~_TIF_PERFCTR;
}
- t->kregs->u_regs[UREG_FP] = t->ksp;
t->flags |= ((long)ASI_P << TI_FLAG_CURRENT_DS_SHIFT);
- flush_register_windows();
- memcpy((void *)(t->ksp + STACK_BIAS),
- (void *)(regs->u_regs[UREG_FP] + STACK_BIAS),
- sizeof(struct sparc_stackf));
t->kregs->u_regs[UREG_G6] = (unsigned long) t;
t->kregs->u_regs[UREG_G4] = (unsigned long) t->task;
} else {
diff --git a/arch/sparc64/kernel/rtrap.S b/arch/sparc64/kernel/rtrap.S
index 16689b2930db..c6fc695fe1fe 100644
--- a/arch/sparc64/kernel/rtrap.S
+++ b/arch/sparc64/kernel/rtrap.S
@@ -1,4 +1,4 @@
-/* $Id: rtrap.S,v 1.61 2002/02/09 19:49:31 davem Exp $
+/*
* rtrap.S: Preparing for return from trap on Sparc V9.
*
* Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
@@ -363,6 +363,7 @@ kern_rtt: rdpr %canrestore, %g1
brz,pn %g1, kern_rtt_fill
nop
kern_rtt_restore:
+ stw %g0, [%sp + PTREGS_OFF + PT_V9_MAGIC]
restore
retry
diff --git a/arch/sparc64/kernel/sbus.c b/arch/sparc64/kernel/sbus.c
index fa2827c4a3ad..e33a8a660e9e 100644
--- a/arch/sparc64/kernel/sbus.c
+++ b/arch/sparc64/kernel/sbus.c
@@ -1,4 +1,4 @@
-/* $Id: sbus.c,v 1.19 2002/01/23 11:27:32 davem Exp $
+/*
* sbus.c: UltraSparc SBUS controller support.
*
* Copyright (C) 1999 David S. Miller (davem@redhat.com)
diff --git a/arch/sparc64/kernel/setup.c b/arch/sparc64/kernel/setup.c
index da5e6ee0c661..c8b03a4f68bf 100644
--- a/arch/sparc64/kernel/setup.c
+++ b/arch/sparc64/kernel/setup.c
@@ -1,4 +1,4 @@
-/* $Id: setup.c,v 1.72 2002/02/09 19:49:30 davem Exp $
+/*
* linux/arch/sparc64/kernel/setup.c
*
* Copyright (C) 1995,1996 David S. Miller (davem@caip.rutgers.edu)
diff --git a/arch/sparc64/kernel/signal.c b/arch/sparc64/kernel/signal.c
index 6e4dc67d16af..9667e96fd513 100644
--- a/arch/sparc64/kernel/signal.c
+++ b/arch/sparc64/kernel/signal.c
@@ -1,4 +1,4 @@
-/* $Id: signal.c,v 1.60 2002/02/09 19:49:31 davem Exp $
+/*
* arch/sparc64/kernel/signal.c
*
* Copyright (C) 1991, 1992 Linus Torvalds
diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c
index 0d6403a630ac..fa63c68a1819 100644
--- a/arch/sparc64/kernel/smp.c
+++ b/arch/sparc64/kernel/smp.c
@@ -900,6 +900,9 @@ extern unsigned long xcall_flush_tlb_mm;
extern unsigned long xcall_flush_tlb_pending;
extern unsigned long xcall_flush_tlb_kernel_range;
extern unsigned long xcall_report_regs;
+#ifdef CONFIG_MAGIC_SYSRQ
+extern unsigned long xcall_fetch_glob_regs;
+#endif
extern unsigned long xcall_receive_signal;
extern unsigned long xcall_new_mmu_context_version;
#ifdef CONFIG_KGDB
@@ -1080,6 +1083,13 @@ void smp_report_regs(void)
smp_cross_call(&xcall_report_regs, 0, 0, 0);
}
+#ifdef CONFIG_MAGIC_SYSRQ
+void smp_fetch_global_regs(void)
+{
+ smp_cross_call(&xcall_fetch_glob_regs, 0, 0, 0);
+}
+#endif
+
/* We know that the window frames of the user have been flushed
* to the stack before we get here because all callers of us
* are flush_tlb_*() routines, and these run after flush_cache_*()
diff --git a/arch/sparc64/kernel/stacktrace.c b/arch/sparc64/kernel/stacktrace.c
index 01b52f561af4..c73ce3f4197e 100644
--- a/arch/sparc64/kernel/stacktrace.c
+++ b/arch/sparc64/kernel/stacktrace.c
@@ -19,7 +19,7 @@ void save_stack_trace(struct stack_trace *trace)
fp = ksp + STACK_BIAS;
thread_base = (unsigned long) tp;
do {
- struct reg_window *rw;
+ struct sparc_stackf *sf;
struct pt_regs *regs;
unsigned long pc;
@@ -28,15 +28,17 @@ void save_stack_trace(struct stack_trace *trace)
fp >= (thread_base + THREAD_SIZE))
break;
- rw = (struct reg_window *) fp;
- regs = (struct pt_regs *) (rw + 1);
+ sf = (struct sparc_stackf *) fp;
+ regs = (struct pt_regs *) (sf + 1);
if ((regs->magic & ~0x1ff) == PT_REGS_MAGIC) {
+ if (!(regs->tstate & TSTATE_PRIV))
+ break;
pc = regs->tpc;
fp = regs->u_regs[UREG_I6] + STACK_BIAS;
} else {
- pc = rw->ins[7];
- fp = rw->ins[6] + STACK_BIAS;
+ pc = sf->callers_pc;
+ fp = (unsigned long)sf->fp + STACK_BIAS;
}
if (trace->skip > 0)
diff --git a/arch/sparc64/kernel/starfire.c b/arch/sparc64/kernel/starfire.c
index b930fee7708a..7461581b3bb9 100644
--- a/arch/sparc64/kernel/starfire.c
+++ b/arch/sparc64/kernel/starfire.c
@@ -1,4 +1,4 @@
-/* $Id: starfire.c,v 1.10 2001/04/14 21:13:45 davem Exp $
+/*
* starfire.c: Starfire/E10000 support.
*
* Copyright (C) 1998 David S. Miller (davem@redhat.com)
diff --git a/arch/sparc64/kernel/sys32.S b/arch/sparc64/kernel/sys32.S
index 010a737908ee..ade18ba0c686 100644
--- a/arch/sparc64/kernel/sys32.S
+++ b/arch/sparc64/kernel/sys32.S
@@ -1,4 +1,4 @@
-/* $Id: sys32.S,v 1.12 2000/03/24 04:17:37 davem Exp $
+/*
* sys32.S: I-cache tricks for 32-bit compatibility layer simple
* conversions.
*
diff --git a/arch/sparc64/kernel/trampoline.S b/arch/sparc64/kernel/trampoline.S
index 56ff55211341..704a3afcfd06 100644
--- a/arch/sparc64/kernel/trampoline.S
+++ b/arch/sparc64/kernel/trampoline.S
@@ -1,4 +1,4 @@
-/* $Id: trampoline.S,v 1.26 2002/02/09 19:49:30 davem Exp $
+/*
* trampoline.S: Jump start slave processors on sparc64.
*
* Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
diff --git a/arch/sparc64/kernel/traps.c b/arch/sparc64/kernel/traps.c
index d9b8d46707d1..369749262653 100644
--- a/arch/sparc64/kernel/traps.c
+++ b/arch/sparc64/kernel/traps.c
@@ -2116,7 +2116,7 @@ void show_stack(struct task_struct *tsk, unsigned long *_ksp)
printk("\n");
#endif
do {
- struct reg_window *rw;
+ struct sparc_stackf *sf;
struct pt_regs *regs;
unsigned long pc;
@@ -2124,15 +2124,17 @@ void show_stack(struct task_struct *tsk, unsigned long *_ksp)
if (fp < (thread_base + sizeof(struct thread_info)) ||
fp >= (thread_base + THREAD_SIZE))
break;
- rw = (struct reg_window *)fp;
- regs = (struct pt_regs *) (rw + 1);
+ sf = (struct sparc_stackf *) fp;
+ regs = (struct pt_regs *) (sf + 1);
if ((regs->magic & ~0x1ff) == PT_REGS_MAGIC) {
+ if (!(regs->tstate & TSTATE_PRIV))
+ break;
pc = regs->tpc;
fp = regs->u_regs[UREG_I6] + STACK_BIAS;
} else {
- pc = rw->ins[7];
- fp = rw->ins[6] + STACK_BIAS;
+ pc = sf->callers_pc;
+ fp = (unsigned long)sf->fp + STACK_BIAS;
}
printk(" [%016lx] ", pc);
diff --git a/arch/sparc64/kernel/unaligned.c b/arch/sparc64/kernel/unaligned.c
index 1a511e9f0d3e..afa7fc4f5193 100644
--- a/arch/sparc64/kernel/unaligned.c
+++ b/arch/sparc64/kernel/unaligned.c
@@ -1,4 +1,4 @@
-/* $Id: unaligned.c,v 1.24 2002/02/09 19:49:31 davem Exp $
+/*
* unaligned.c: Unaligned load/store trap handling with special
* cases for the kernel to do them more quickly.
*
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