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-rw-r--r--arch/sparc64/kernel/of_device.c5
-rw-r--r--arch/sparc64/kernel/process.c110
-rw-r--r--arch/sparc64/kernel/signal.c6
-rw-r--r--arch/sparc64/kernel/smp.c6
-rw-r--r--arch/sparc64/kernel/sparc64_ksyms.c1
-rw-r--r--arch/sparc64/kernel/traps.c10
-rw-r--r--arch/sparc64/mm/ultra.S42
7 files changed, 48 insertions, 132 deletions
diff --git a/arch/sparc64/kernel/of_device.c b/arch/sparc64/kernel/of_device.c
index 4fd48ab7dda4..f8b50cbf4bf7 100644
--- a/arch/sparc64/kernel/of_device.c
+++ b/arch/sparc64/kernel/of_device.c
@@ -56,9 +56,6 @@ struct of_device *of_find_device_by_node(struct device_node *dp)
EXPORT_SYMBOL(of_find_device_by_node);
#ifdef CONFIG_PCI
-struct bus_type isa_bus_type;
-EXPORT_SYMBOL(isa_bus_type);
-
struct bus_type ebus_bus_type;
EXPORT_SYMBOL(ebus_bus_type);
#endif
@@ -842,8 +839,6 @@ static int __init of_bus_driver_init(void)
err = of_bus_type_init(&of_platform_bus_type, "of");
#ifdef CONFIG_PCI
if (!err)
- err = of_bus_type_init(&isa_bus_type, "isa");
- if (!err)
err = of_bus_type_init(&ebus_bus_type, "ebus");
#endif
#ifdef CONFIG_SBUS
diff --git a/arch/sparc64/kernel/process.c b/arch/sparc64/kernel/process.c
index 8a9cd3e165b9..7f5debdc5fed 100644
--- a/arch/sparc64/kernel/process.c
+++ b/arch/sparc64/kernel/process.c
@@ -52,8 +52,6 @@
#include <asm/irq_regs.h>
#include <asm/smp.h>
-/* #define VERBOSE_SHOWREGS */
-
static void sparc64_yield(int cpu)
{
if (tlb_type != hypervisor)
@@ -213,22 +211,8 @@ static void show_regwindow(struct pt_regs *regs)
printk("I7: <%pS>\n", (void *) rwk->ins[7]);
}
-#ifdef CONFIG_SMP
-static DEFINE_SPINLOCK(regdump_lock);
-#endif
-
-void __show_regs(struct pt_regs * regs)
+void show_regs(struct pt_regs *regs)
{
-#ifdef CONFIG_SMP
- unsigned long flags;
-
- /* Protect against xcall ipis which might lead to livelock on the lock */
- __asm__ __volatile__("rdpr %%pstate, %0\n\t"
- "wrpr %0, %1, %%pstate"
- : "=r" (flags)
- : "i" (PSTATE_IE));
- spin_lock(&regdump_lock);
-#endif
printk("TSTATE: %016lx TPC: %016lx TNPC: %016lx Y: %08x %s\n", regs->tstate,
regs->tpc, regs->tnpc, regs->y, print_tainted());
printk("TPC: <%pS>\n", (void *) regs->tpc);
@@ -246,64 +230,24 @@ void __show_regs(struct pt_regs * regs)
regs->u_regs[15]);
printk("RPC: <%pS>\n", (void *) regs->u_regs[15]);
show_regwindow(regs);
-#ifdef CONFIG_SMP
- spin_unlock(&regdump_lock);
- __asm__ __volatile__("wrpr %0, 0, %%pstate"
- : : "r" (flags));
-#endif
}
-#ifdef VERBOSE_SHOWREGS
-static void idump_from_user (unsigned int *pc)
-{
- int i;
- int code;
-
- if((((unsigned long) pc) & 3))
- return;
-
- pc -= 3;
- for(i = -3; i < 6; i++) {
- get_user(code, pc);
- printk("%c%08x%c",i?' ':'<',code,i?' ':'>');
- pc++;
- }
- printk("\n");
-}
-#endif
+struct global_reg_snapshot global_reg_snapshot[NR_CPUS];
+static DEFINE_SPINLOCK(global_reg_snapshot_lock);
-void show_regs(struct pt_regs *regs)
+static bool kstack_valid(struct thread_info *tp, struct reg_window *rw)
{
-#ifdef VERBOSE_SHOWREGS
- extern long etrap, etraptl1;
-#endif
- __show_regs(regs);
-#if 0
-#ifdef CONFIG_SMP
- {
- extern void smp_report_regs(void);
+ unsigned long thread_base, fp;
- smp_report_regs();
- }
-#endif
-#endif
+ thread_base = (unsigned long) tp;
+ fp = (unsigned long) rw;
-#ifdef VERBOSE_SHOWREGS
- if (regs->tpc >= &etrap && regs->tpc < &etraptl1 &&
- regs->u_regs[14] >= (long)current - PAGE_SIZE &&
- regs->u_regs[14] < (long)current + 6 * PAGE_SIZE) {
- printk ("*********parent**********\n");
- __show_regs((struct pt_regs *)(regs->u_regs[14] + PTREGS_OFF));
- idump_from_user(((struct pt_regs *)(regs->u_regs[14] + PTREGS_OFF))->tpc);
- printk ("*********endpar**********\n");
- }
-#endif
+ if (fp < (thread_base + sizeof(struct thread_info)) ||
+ fp >= (thread_base + THREAD_SIZE))
+ return false;
+ return true;
}
-#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)
{
@@ -315,14 +259,22 @@ static void __global_reg_self(struct thread_info *tp, struct pt_regs *regs,
global_reg_snapshot[this_cpu].o7 = regs->u_regs[UREG_I7];
if (regs->tstate & TSTATE_PRIV) {
+ struct thread_info *tp = current_thread_info();
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
+ if (kstack_valid(tp, rw)) {
+ global_reg_snapshot[this_cpu].i7 = rw->ins[7];
+ rw = (struct reg_window *)
+ (rw->ins[6] + STACK_BIAS);
+ if (kstack_valid(tp, rw))
+ global_reg_snapshot[this_cpu].rpc = rw->ins[7];
+ }
+ } else {
global_reg_snapshot[this_cpu].i7 = 0;
-
+ global_reg_snapshot[this_cpu].rpc = 0;
+ }
global_reg_snapshot[this_cpu].thread = tp;
}
@@ -341,7 +293,7 @@ static void __global_reg_poll(struct global_reg_snapshot *gp)
}
}
-static void sysrq_handle_globreg(int key, struct tty_struct *tty)
+void __trigger_all_cpu_backtrace(void)
{
struct thread_info *tp = current_thread_info();
struct pt_regs *regs = get_irq_regs();
@@ -375,13 +327,14 @@ static void sysrq_handle_globreg(int key, struct tty_struct *tty)
((tp && tp->task) ? tp->task->pid : -1));
if (gp->tstate & TSTATE_PRIV) {
- printk(" TPC[%pS] O7[%pS] I7[%pS]\n",
+ printk(" TPC[%pS] O7[%pS] I7[%pS] RPC[%pS]\n",
(void *) gp->tpc,
(void *) gp->o7,
- (void *) gp->i7);
+ (void *) gp->i7,
+ (void *) gp->rpc);
} else {
- printk(" TPC[%lx] O7[%lx] I7[%lx]\n",
- gp->tpc, gp->o7, gp->i7);
+ printk(" TPC[%lx] O7[%lx] I7[%lx] RPC[%lx]\n",
+ gp->tpc, gp->o7, gp->i7, gp->rpc);
}
}
@@ -390,6 +343,13 @@ static void sysrq_handle_globreg(int key, struct tty_struct *tty)
spin_unlock_irqrestore(&global_reg_snapshot_lock, flags);
}
+#ifdef CONFIG_MAGIC_SYSRQ
+
+static void sysrq_handle_globreg(int key, struct tty_struct *tty)
+{
+ __trigger_all_cpu_backtrace();
+}
+
static struct sysrq_key_op sparc_globalreg_op = {
.handler = sysrq_handle_globreg,
.help_msg = "Globalregs",
diff --git a/arch/sparc64/kernel/signal.c b/arch/sparc64/kernel/signal.c
index d1b84456a9ee..ca5a6ae3a6e2 100644
--- a/arch/sparc64/kernel/signal.c
+++ b/arch/sparc64/kernel/signal.c
@@ -2,7 +2,7 @@
* arch/sparc64/kernel/signal.c
*
* Copyright (C) 1991, 1992 Linus Torvalds
- * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 1995, 2008 David S. Miller (davem@davemloft.net)
* Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
* Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
* Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
@@ -91,7 +91,9 @@ asmlinkage void sparc64_set_context(struct pt_regs *regs)
err |= __get_user(regs->u_regs[UREG_G4], (&(*grp)[MC_G4]));
err |= __get_user(regs->u_regs[UREG_G5], (&(*grp)[MC_G5]));
err |= __get_user(regs->u_regs[UREG_G6], (&(*grp)[MC_G6]));
- err |= __get_user(regs->u_regs[UREG_G7], (&(*grp)[MC_G7]));
+
+ /* Skip %g7 as that's the thread register in userspace. */
+
err |= __get_user(regs->u_regs[UREG_I0], (&(*grp)[MC_O0]));
err |= __get_user(regs->u_regs[UREG_I1], (&(*grp)[MC_O1]));
err |= __get_user(regs->u_regs[UREG_I2], (&(*grp)[MC_O2]));
diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c
index 7cf72b4bb108..340842e51ce1 100644
--- a/arch/sparc64/kernel/smp.c
+++ b/arch/sparc64/kernel/smp.c
@@ -843,7 +843,6 @@ void smp_tsb_sync(struct mm_struct *mm)
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
@@ -1022,11 +1021,6 @@ void kgdb_roundup_cpus(unsigned long flags)
}
#endif
-void smp_report_regs(void)
-{
- smp_cross_call(&xcall_report_regs, 0, 0, 0);
-}
-
#ifdef CONFIG_MAGIC_SYSRQ
void smp_fetch_global_regs(void)
{
diff --git a/arch/sparc64/kernel/sparc64_ksyms.c b/arch/sparc64/kernel/sparc64_ksyms.c
index 504e678ee128..0804f71df6cb 100644
--- a/arch/sparc64/kernel/sparc64_ksyms.c
+++ b/arch/sparc64/kernel/sparc64_ksyms.c
@@ -68,7 +68,6 @@ extern void *__memscan_zero(void *, size_t);
extern void *__memscan_generic(void *, int, size_t);
extern int __memcmp(const void *, const void *, __kernel_size_t);
extern __kernel_size_t strlen(const char *);
-extern void show_regs(struct pt_regs *);
extern void syscall_trace(struct pt_regs *, int);
extern void sys_sigsuspend(void);
extern int compat_sys_ioctl(unsigned int fd, unsigned int cmd, u32 arg);
diff --git a/arch/sparc64/kernel/traps.c b/arch/sparc64/kernel/traps.c
index bd30ecba5630..404e8561e2d0 100644
--- a/arch/sparc64/kernel/traps.c
+++ b/arch/sparc64/kernel/traps.c
@@ -1777,7 +1777,7 @@ static void sun4v_log_error(struct pt_regs *regs, struct sun4v_error_entry *ent,
pfx,
ent->err_raddr, ent->err_size, ent->err_cpu);
- __show_regs(regs);
+ show_regs(regs);
if ((cnt = atomic_read(ocnt)) != 0) {
atomic_set(ocnt, 0);
@@ -2177,7 +2177,6 @@ static inline struct reg_window *kernel_stack_up(struct reg_window *rw)
void die_if_kernel(char *str, struct pt_regs *regs)
{
static int die_counter;
- extern void smp_report_regs(void);
int count = 0;
/* Amuse the user. */
@@ -2190,7 +2189,7 @@ void die_if_kernel(char *str, struct pt_regs *regs)
printk("%s(%d): %s [#%d]\n", current->comm, task_pid_nr(current), str, ++die_counter);
notify_die(DIE_OOPS, str, regs, 0, 255, SIGSEGV);
__asm__ __volatile__("flushw");
- __show_regs(regs);
+ show_regs(regs);
add_taint(TAINT_DIE);
if (regs->tstate & TSTATE_PRIV) {
struct reg_window *rw = (struct reg_window *)
@@ -2215,11 +2214,6 @@ void die_if_kernel(char *str, struct pt_regs *regs)
}
user_instruction_dump ((unsigned int __user *) regs->tpc);
}
-#if 0
-#ifdef CONFIG_SMP
- smp_report_regs();
-#endif
-#endif
if (regs->tstate & TSTATE_PRIV)
do_exit(SIGKILL);
do_exit(SIGSEGV);
diff --git a/arch/sparc64/mm/ultra.S b/arch/sparc64/mm/ultra.S
index 4c8ca131ffaf..ff1dc44d363e 100644
--- a/arch/sparc64/mm/ultra.S
+++ b/arch/sparc64/mm/ultra.S
@@ -480,41 +480,6 @@ xcall_sync_tick:
b rtrap_xcall
ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %l1
- /* NOTE: This is SPECIAL!! We do etrap/rtrap however
- * we choose to deal with the "BH's run with
- * %pil==15" problem (described in asm/pil.h)
- * by just invoking rtrap directly past where
- * BH's are checked for.
- *
- * We do it like this because we do not want %pil==15
- * lockups to prevent regs being reported.
- */
- .globl xcall_report_regs
-xcall_report_regs:
-
-661: rdpr %pstate, %g2
- wrpr %g2, PSTATE_IG | PSTATE_AG, %pstate
- .section .sun4v_2insn_patch, "ax"
- .word 661b
- nop
- nop
- .previous
-
- rdpr %pil, %g2
- wrpr %g0, 15, %pil
- sethi %hi(109f), %g7
- b,pt %xcc, etrap_irq
-109: or %g7, %lo(109b), %g7
-#ifdef CONFIG_TRACE_IRQFLAGS
- call trace_hardirqs_off
- nop
-#endif
- call __show_regs
- add %sp, PTREGS_OFF, %o0
- /* Has to be a non-v9 branch due to the large distance. */
- b rtrap_xcall
- ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %l1
-
#ifdef CONFIG_MAGIC_SYSRQ
.globl xcall_fetch_glob_regs
xcall_fetch_glob_regs:
@@ -531,6 +496,13 @@ xcall_fetch_glob_regs:
stx %g7, [%g1 + GR_SNAP_TNPC]
stx %o7, [%g1 + GR_SNAP_O7]
stx %i7, [%g1 + GR_SNAP_I7]
+ /* Don't try this at home kids... */
+ rdpr %cwp, %g2
+ sub %g2, 1, %g7
+ wrpr %g7, %cwp
+ mov %i7, %g7
+ wrpr %g2, %cwp
+ stx %g7, [%g1 + GR_SNAP_RPC]
sethi %hi(trap_block), %g7
or %g7, %lo(trap_block), %g7
sllx %g2, TRAP_BLOCK_SZ_SHIFT, %g2
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-02 12:37:45 +0000