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-rw-r--r--arch/parisc/kernel/Makefile15
-rw-r--r--arch/parisc/kernel/entry.S60
-rw-r--r--arch/parisc/kernel/firmware.c6
-rw-r--r--arch/parisc/kernel/ftrace.c185
-rw-r--r--arch/parisc/kernel/irq.c4
-rw-r--r--arch/parisc/kernel/module.c18
-rw-r--r--arch/parisc/kernel/parisc_ksyms.c5
-rw-r--r--arch/parisc/kernel/process.c31
-rw-r--r--arch/parisc/kernel/processor.c13
-rw-r--r--arch/parisc/kernel/smp.c21
-rw-r--r--arch/parisc/kernel/stacktrace.c63
-rw-r--r--arch/parisc/kernel/syscall.S58
-rw-r--r--arch/parisc/kernel/time.c12
-rw-r--r--arch/parisc/kernel/traps.c5
-rw-r--r--arch/parisc/kernel/vmlinux.lds.S2
15 files changed, 420 insertions, 78 deletions
diff --git a/arch/parisc/kernel/Makefile b/arch/parisc/kernel/Makefile
index 016d3fc4111c..67db0722e6ca 100644
--- a/arch/parisc/kernel/Makefile
+++ b/arch/parisc/kernel/Makefile
@@ -11,10 +11,25 @@ obj-y := cache.o pacache.o setup.o traps.o time.o irq.o \
process.o processor.o pdc_cons.o pdc_chassis.o unwind.o \
topology.o
+ifdef CONFIG_FUNCTION_TRACER
+# Do not profile debug and lowlevel utilities
+CFLAGS_REMOVE_ftrace.o = -pg
+CFLAGS_REMOVE_cache.o = -pg
+CFLAGS_REMOVE_irq.o = -pg
+CFLAGS_REMOVE_pacache.o = -pg
+CFLAGS_REMOVE_perf.o = -pg
+CFLAGS_REMOVE_traps.o = -pg
+CFLAGS_REMOVE_unaligned.o = -pg
+CFLAGS_REMOVE_unwind.o = -pg
+endif
+
obj-$(CONFIG_SMP) += smp.o
obj-$(CONFIG_PA11) += pci-dma.o
obj-$(CONFIG_PCI) += pci.o
obj-$(CONFIG_MODULES) += module.o
obj-$(CONFIG_64BIT) += binfmt_elf32.o sys_parisc32.o signal32.o
+obj-$(CONFIG_STACKTRACE)+= stacktrace.o
# only supported for PCX-W/U in 64-bit mode at the moment
obj-$(CONFIG_64BIT) += perf.o perf_asm.o
+obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o
+obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index 0db9fdcb7709..ae3e70cd1e14 100644
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -505,6 +505,18 @@
STREG \pte,0(\ptep)
.endm
+ /* bitshift difference between a PFN (based on kernel's PAGE_SIZE)
+ * to a CPU TLB 4k PFN (4k => 12 bits to shift) */
+ #define PAGE_ADD_SHIFT (PAGE_SHIFT-12)
+
+ /* Drop prot bits and convert to page addr for iitlbt and idtlbt */
+ .macro convert_for_tlb_insert20 pte
+ extrd,u \pte,(63-ASM_PFN_PTE_SHIFT)+(63-58)+PAGE_ADD_SHIFT,\
+ 64-PAGE_SHIFT-PAGE_ADD_SHIFT,\pte
+ depdi _PAGE_SIZE_ENCODING_DEFAULT,63,\
+ (63-58)+PAGE_ADD_SHIFT,\pte
+ .endm
+
/* Convert the pte and prot to tlb insertion values. How
* this happens is quite subtle, read below */
.macro make_insert_tlb spc,pte,prot
@@ -544,8 +556,7 @@
depi 1,12,1,\prot
/* Drop prot bits and convert to page addr for iitlbt and idtlbt */
- extrd,u \pte,(63-ASM_PFN_PTE_SHIFT)+(63-58),64-PAGE_SHIFT,\pte
- depdi _PAGE_SIZE_ENCODING_DEFAULT,63,63-58,\pte
+ convert_for_tlb_insert20 \pte
.endm
/* Identical macro to make_insert_tlb above, except it
@@ -563,8 +574,8 @@
/* Get rid of prot bits and convert to page addr for iitlba */
- depi _PAGE_SIZE_ENCODING_DEFAULT,31,ASM_PFN_PTE_SHIFT,\pte
- extru \pte,24,25,\pte
+ depi 0,31,ASM_PFN_PTE_SHIFT,\pte
+ SHRREG \pte,(ASM_PFN_PTE_SHIFT-(31-26)),\pte
.endm
/* This is for ILP32 PA2.0 only. The TLB insertion needs
@@ -1244,10 +1255,9 @@ nadtlb_check_flush_20w:
depdi,z 7,7,3,prot
depdi 1,10,1,prot
- /* Get rid of prot bits and convert to page addr for idtlbt */
+ /* Drop prot bits from pte and convert to page addr for idtlbt */
+ convert_for_tlb_insert20 pte
- depdi 0,63,12,pte
- extrd,u pte,56,52,pte
idtlbt pte,prot
rfir
@@ -1337,8 +1347,8 @@ nadtlb_check_flush_11:
/* Get rid of prot bits and convert to page addr for idtlba */
- depi 0,31,12,pte
- extru pte,24,25,pte
+ depi 0,31,ASM_PFN_PTE_SHIFT,pte
+ SHRREG pte,(ASM_PFN_PTE_SHIFT-(31-26)),pte
mfsp %sr1,t0 /* Save sr1 so we can use it in tlb inserts */
mtsp spc,%sr1
@@ -1403,10 +1413,9 @@ nadtlb_check_flush_20:
depdi,z 7,7,3,prot
depdi 1,10,1,prot
- /* Get rid of prot bits and convert to page addr for idtlbt */
+ /* Drop prot bits from pte and convert to page addr for idtlbt */
+ convert_for_tlb_insert20 pte
- depdi 0,63,12,pte
- extrd,u pte,56,32,pte
idtlbt pte,prot
rfir
@@ -2176,6 +2185,33 @@ syscall_do_resched:
ENDPROC(syscall_exit)
+#ifdef CONFIG_FUNCTION_TRACER
+ .import ftrace_function_trampoline,code
+ENTRY(_mcount)
+ copy %r3, %arg2
+ b ftrace_function_trampoline
+ nop
+ENDPROC(_mcount)
+
+ENTRY(return_to_handler)
+ load32 return_trampoline, %rp
+ copy %ret0, %arg0
+ copy %ret1, %arg1
+ b ftrace_return_to_handler
+ nop
+return_trampoline:
+ copy %ret0, %rp
+ copy %r23, %ret0
+ copy %r24, %ret1
+
+.globl ftrace_stub
+ftrace_stub:
+ bv %r0(%rp)
+ nop
+ENDPROC(return_to_handler)
+#endif /* CONFIG_FUNCTION_TRACER */
+
+
get_register:
/*
* get_register is used by the non access tlb miss handlers to
diff --git a/arch/parisc/kernel/firmware.c b/arch/parisc/kernel/firmware.c
index f6d241238a78..4c247e02d9b1 100644
--- a/arch/parisc/kernel/firmware.c
+++ b/arch/parisc/kernel/firmware.c
@@ -527,7 +527,11 @@ int pdc_model_capabilities(unsigned long *capabilities)
pdc_result[0] = 0; /* preset zero (call may not be implemented!) */
retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES, __pa(pdc_result), 0);
convert_to_wide(pdc_result);
- *capabilities = pdc_result[0];
+ if (retval == PDC_OK) {
+ *capabilities = pdc_result[0];
+ } else {
+ *capabilities = PDC_MODEL_OS32;
+ }
spin_unlock_irqrestore(&pdc_lock, flags);
return retval;
diff --git a/arch/parisc/kernel/ftrace.c b/arch/parisc/kernel/ftrace.c
new file mode 100644
index 000000000000..9877372ffdba
--- /dev/null
+++ b/arch/parisc/kernel/ftrace.c
@@ -0,0 +1,185 @@
+/*
+ * Code for tracing calls in Linux kernel.
+ * Copyright (C) 2009 Helge Deller <deller@gmx.de>
+ *
+ * based on code for x86 which is:
+ * Copyright (C) 2007-2008 Steven Rostedt <srostedt@redhat.com>
+ *
+ * future possible enhancements:
+ * - add CONFIG_DYNAMIC_FTRACE
+ * - add CONFIG_STACK_TRACER
+ */
+
+#include <linux/init.h>
+#include <linux/ftrace.h>
+
+#include <asm/sections.h>
+#include <asm/ftrace.h>
+
+
+
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+
+/* Add a function return address to the trace stack on thread info.*/
+static int push_return_trace(unsigned long ret, unsigned long long time,
+ unsigned long func, int *depth)
+{
+ int index;
+
+ if (!current->ret_stack)
+ return -EBUSY;
+
+ /* The return trace stack is full */
+ if (current->curr_ret_stack == FTRACE_RETFUNC_DEPTH - 1) {
+ atomic_inc(&current->trace_overrun);
+ return -EBUSY;
+ }
+
+ index = ++current->curr_ret_stack;
+ barrier();
+ current->ret_stack[index].ret = ret;
+ current->ret_stack[index].func = func;
+ current->ret_stack[index].calltime = time;
+ *depth = index;
+
+ return 0;
+}
+
+/* Retrieve a function return address to the trace stack on thread info.*/
+static void pop_return_trace(struct ftrace_graph_ret *trace, unsigned long *ret)
+{
+ int index;
+
+ index = current->curr_ret_stack;
+
+ if (unlikely(index < 0)) {
+ ftrace_graph_stop();
+ WARN_ON(1);
+ /* Might as well panic, otherwise we have no where to go */
+ *ret = (unsigned long)
+ dereference_function_descriptor(&panic);
+ return;
+ }
+
+ *ret = current->ret_stack[index].ret;
+ trace->func = current->ret_stack[index].func;
+ trace->calltime = current->ret_stack[index].calltime;
+ trace->overrun = atomic_read(&current->trace_overrun);
+ trace->depth = index;
+ barrier();
+ current->curr_ret_stack--;
+
+}
+
+/*
+ * Send the trace to the ring-buffer.
+ * @return the original return address.
+ */
+unsigned long ftrace_return_to_handler(unsigned long retval0,
+ unsigned long retval1)
+{
+ struct ftrace_graph_ret trace;
+ unsigned long ret;
+
+ pop_return_trace(&trace, &ret);
+ trace.rettime = cpu_clock(raw_smp_processor_id());
+ ftrace_graph_return(&trace);
+
+ if (unlikely(!ret)) {
+ ftrace_graph_stop();
+ WARN_ON(1);
+ /* Might as well panic. What else to do? */
+ ret = (unsigned long)
+ dereference_function_descriptor(&panic);
+ }
+
+ /* HACK: we hand over the old functions' return values
+ in %r23 and %r24. Assembly in entry.S will take care
+ and move those to their final registers %ret0 and %ret1 */
+ asm( "copy %0, %%r23 \n\t"
+ "copy %1, %%r24 \n" : : "r" (retval0), "r" (retval1) );
+
+ return ret;
+}
+
+/*
+ * Hook the return address and push it in the stack of return addrs
+ * in current thread info.
+ */
+void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr)
+{
+ unsigned long old;
+ unsigned long long calltime;
+ struct ftrace_graph_ent trace;
+
+ if (unlikely(atomic_read(&current->tracing_graph_pause)))
+ return;
+
+ old = *parent;
+ *parent = (unsigned long)
+ dereference_function_descriptor(&return_to_handler);
+
+ if (unlikely(!__kernel_text_address(old))) {
+ ftrace_graph_stop();
+ *parent = old;
+ WARN_ON(1);
+ return;
+ }
+
+ calltime = cpu_clock(raw_smp_processor_id());
+
+ if (push_return_trace(old, calltime,
+ self_addr, &trace.depth) == -EBUSY) {
+ *parent = old;
+ return;
+ }
+
+ trace.func = self_addr;
+
+ /* Only trace if the calling function expects to */
+ if (!ftrace_graph_entry(&trace)) {
+ current->curr_ret_stack--;
+ *parent = old;
+ }
+}
+
+#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
+
+
+void ftrace_function_trampoline(unsigned long parent,
+ unsigned long self_addr,
+ unsigned long org_sp_gr3)
+{
+ extern ftrace_func_t ftrace_trace_function;
+
+ if (function_trace_stop)
+ return;
+
+ if (ftrace_trace_function != ftrace_stub) {
+ ftrace_trace_function(parent, self_addr);
+ return;
+ }
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+ if (ftrace_graph_entry && ftrace_graph_return) {
+ unsigned long sp;
+ unsigned long *parent_rp;
+
+ asm volatile ("copy %%r30, %0" : "=r"(sp));
+ /* sanity check: is stack pointer which we got from
+ assembler function in entry.S in a reasonable
+ range compared to current stack pointer? */
+ if ((sp - org_sp_gr3) > 0x400)
+ return;
+
+ /* calculate pointer to %rp in stack */
+ parent_rp = (unsigned long *) org_sp_gr3 - 0x10;
+ /* sanity check: parent_rp should hold parent */
+ if (*parent_rp != parent)
+ return;
+
+ prepare_ftrace_return(parent_rp, self_addr);
+ return;
+ }
+#endif
+}
+
diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c
index 1c740f5cbd63..4ea4229d765c 100644
--- a/arch/parisc/kernel/irq.c
+++ b/arch/parisc/kernel/irq.c
@@ -311,12 +311,12 @@ unsigned long txn_alloc_addr(unsigned int virt_irq)
next_cpu++; /* assign to "next" CPU we want this bugger on */
/* validate entry */
- while ((next_cpu < NR_CPUS) &&
+ while ((next_cpu < nr_cpu_ids) &&
(!per_cpu(cpu_data, next_cpu).txn_addr ||
!cpu_online(next_cpu)))
next_cpu++;
- if (next_cpu >= NR_CPUS)
+ if (next_cpu >= nr_cpu_ids)
next_cpu = 0; /* nothing else, assign monarch */
return txn_affinity_addr(virt_irq, next_cpu);
diff --git a/arch/parisc/kernel/module.c b/arch/parisc/kernel/module.c
index 9013243cecca..ecd1c5024447 100644
--- a/arch/parisc/kernel/module.c
+++ b/arch/parisc/kernel/module.c
@@ -61,9 +61,7 @@
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/bug.h>
-#include <linux/uaccess.h>
-#include <asm/sections.h>
#include <asm/unwind.h>
#if 0
@@ -115,8 +113,6 @@ struct got_entry {
Elf32_Addr addr;
};
-#define Elf_Fdesc Elf32_Fdesc
-
struct stub_entry {
Elf32_Word insns[2]; /* each stub entry has two insns */
};
@@ -125,8 +121,6 @@ struct got_entry {
Elf64_Addr addr;
};
-#define Elf_Fdesc Elf64_Fdesc
-
struct stub_entry {
Elf64_Word insns[4]; /* each stub entry has four insns */
};
@@ -916,15 +910,3 @@ void module_arch_cleanup(struct module *mod)
deregister_unwind_table(mod);
module_bug_cleanup(mod);
}
-
-#ifdef CONFIG_64BIT
-void *dereference_function_descriptor(void *ptr)
-{
- Elf64_Fdesc *desc = ptr;
- void *p;
-
- if (!probe_kernel_address(&desc->addr, p))
- ptr = p;
- return ptr;
-}
-#endif
diff --git a/arch/parisc/kernel/parisc_ksyms.c b/arch/parisc/kernel/parisc_ksyms.c
index 0eecfbbc59cd..df653663d3db 100644
--- a/arch/parisc/kernel/parisc_ksyms.c
+++ b/arch/parisc/kernel/parisc_ksyms.c
@@ -153,5 +153,10 @@ EXPORT_SYMBOL(node_data);
EXPORT_SYMBOL(pfnnid_map);
#endif
+#ifdef CONFIG_FUNCTION_TRACER
+extern void _mcount(void);
+EXPORT_SYMBOL(_mcount);
+#endif
+
/* from pacache.S -- needed for copy_page */
EXPORT_SYMBOL(copy_user_page_asm);
diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c
index b80e02a4d81d..6f69101f90bb 100644
--- a/arch/parisc/kernel/process.c
+++ b/arch/parisc/kernel/process.c
@@ -46,14 +46,15 @@
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/kallsyms.h>
+#include <linux/uaccess.h>
#include <asm/io.h>
#include <asm/asm-offsets.h>
#include <asm/pdc.h>
#include <asm/pdc_chassis.h>
#include <asm/pgalloc.h>
-#include <asm/uaccess.h>
#include <asm/unwind.h>
+#include <asm/sections.h>
/*
* The idle thread. There's no useful work to be
@@ -231,8 +232,8 @@ sys_clone(unsigned long clone_flags, unsigned long usp,
However, these last 3 args are only examined
if the proper flags are set. */
- int __user *child_tidptr;
- int __user *parent_tidptr;
+ int __user *parent_tidptr = (int __user *)regs->gr[24];
+ int __user *child_tidptr = (int __user *)regs->gr[22];
/* usp must be word aligned. This also prevents users from
* passing in the value 1 (which is the signal for a special
@@ -243,16 +244,6 @@ sys_clone(unsigned long clone_flags, unsigned long usp,
if (usp == 0)
usp = regs->gr[30];
- if (clone_flags & CLONE_PARENT_SETTID)
- parent_tidptr = (int __user *)regs->gr[24];
- else
- parent_tidptr = NULL;
-
- if (clone_flags & (CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID))
- child_tidptr = (int __user *)regs->gr[22];
- else
- child_tidptr = NULL;
-
return do_fork(clone_flags, usp, regs, 0, parent_tidptr, child_tidptr);
}
@@ -263,7 +254,7 @@ sys_vfork(struct pt_regs *regs)
}
int
-copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
+copy_thread(unsigned long clone_flags, unsigned long usp,
unsigned long unused, /* in ia64 this is "user_stack_size" */
struct task_struct * p, struct pt_regs * pregs)
{
@@ -400,3 +391,15 @@ get_wchan(struct task_struct *p)
} while (count++ < 16);
return 0;
}
+
+#ifdef CONFIG_64BIT
+void *dereference_function_descriptor(void *ptr)
+{
+ Elf64_Fdesc *desc = ptr;
+ void *p;
+
+ if (!probe_kernel_address(&desc->addr, p))
+ ptr = p;
+ return ptr;
+}
+#endif
diff --git a/arch/parisc/kernel/processor.c b/arch/parisc/kernel/processor.c
index ecb609342feb..e09d0f7fb6b0 100644
--- a/arch/parisc/kernel/processor.c
+++ b/arch/parisc/kernel/processor.c
@@ -100,8 +100,8 @@ static int __cpuinit processor_probe(struct parisc_device *dev)
struct cpuinfo_parisc *p;
#ifdef CONFIG_SMP
- if (num_online_cpus() >= NR_CPUS) {
- printk(KERN_INFO "num_online_cpus() >= NR_CPUS\n");
+ if (num_online_cpus() >= nr_cpu_ids) {
+ printk(KERN_INFO "num_online_cpus() >= nr_cpu_ids\n");
return 1;
}
#else
@@ -214,7 +214,7 @@ static int __cpuinit processor_probe(struct parisc_device *dev)
*/
#ifdef CONFIG_SMP
if (cpuid) {
- cpu_set(cpuid, cpu_present_map);
+ set_cpu_present(cpuid, true);
cpu_up(cpuid);
}
#endif
@@ -364,6 +364,13 @@ show_cpuinfo (struct seq_file *m, void *v)
boot_cpu_data.cpu_hz / 1000000,
boot_cpu_data.cpu_hz % 1000000 );
+ seq_printf(m, "capabilities\t:");
+ if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS32)
+ seq_printf(m, " os32");
+ if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS64)
+ seq_printf(m, " os64");
+ seq_printf(m, "\n");
+
seq_printf(m, "model\t\t: %s\n"
"model name\t: %s\n",
boot_cpu_data.pdc.sys_model_name,
diff --git a/arch/parisc/kernel/smp.c b/arch/parisc/kernel/smp.c
index 9995d7ed5819..1fd0f0cec037 100644
--- a/arch/parisc/kernel/smp.c
+++ b/arch/parisc/kernel/smp.c
@@ -31,6 +31,7 @@
#include <linux/err.h>
#include <linux/delay.h>
#include <linux/bitops.h>
+#include <linux/ftrace.h>
#include <asm/system.h>
#include <asm/atomic.h>
@@ -113,14 +114,14 @@ halt_processor(void)
{
/* REVISIT : redirect I/O Interrupts to another CPU? */
/* REVISIT : does PM *know* this CPU isn't available? */
- cpu_clear(smp_processor_id(), cpu_online_map);
+ set_cpu_online(smp_processor_id(), false);
local_irq_disable();
for (;;)
;
}
-irqreturn_t
+irqreturn_t __irq_entry
ipi_interrupt(int irq, void *dev_id)
{
int this_cpu = smp_processor_id();
@@ -214,11 +215,11 @@ ipi_send(int cpu, enum ipi_message_type op)
}
static void
-send_IPI_mask(cpumask_t mask, enum ipi_message_type op)
+send_IPI_mask(const struct cpumask *mask, enum ipi_message_type op)
{
int cpu;
- for_each_cpu_mask(cpu, mask)
+ for_each_cpu(cpu, mask)
ipi_send(cpu, op);
}
@@ -257,7 +258,7 @@ smp_send_all_nop(void)
send_IPI_allbutself(IPI_NOP);
}
-void arch_send_call_function_ipi(cpumask_t mask)
+void arch_send_call_function_ipi_mask(const struct cpumask *mask)
{
send_IPI_mask(mask, IPI_CALL_FUNC);
}
@@ -296,13 +297,14 @@ smp_cpu_init(int cpunum)
mb();
/* Well, support 2.4 linux scheme as well. */
- if (cpu_test_and_set(cpunum, cpu_online_map))
+ if (cpu_isset(cpunum, cpu_online_map))
{
extern void machine_halt(void); /* arch/parisc.../process.c */
printk(KERN_CRIT "CPU#%d already initialized!\n", cpunum);
machine_halt();
}
+ set_cpu_online(cpunum, true);
/* Initialise the idle task for this CPU */
atomic_inc(&init_mm.mm_count);
@@ -424,8 +426,8 @@ void __init smp_prepare_boot_cpu(void)
/* Setup BSP mappings */
printk(KERN_INFO "SMP: bootstrap CPU ID is %d\n", bootstrap_processor);
- cpu_set(bootstrap_processor, cpu_online_map);
- cpu_set(bootstrap_processor, cpu_present_map);
+ set_cpu_online(bootstrap_processor, true);
+ set_cpu_present(bootstrap_processor, true);
}
@@ -436,8 +438,7 @@ void __init smp_prepare_boot_cpu(void)
*/
void __init smp_prepare_cpus(unsigned int max_cpus)
{
- cpus_clear(cpu_present_map);
- cpu_set(0, cpu_present_map);
+ init_cpu_present(cpumask_of(0));
parisc_max_cpus = max_cpus;
if (!max_cpus)
diff --git a/arch/parisc/kernel/stacktrace.c b/arch/parisc/kernel/stacktrace.c
new file mode 100644
index 000000000000..2fe914c5f533
--- /dev/null
+++ b/arch/parisc/kernel/stacktrace.c
@@ -0,0 +1,63 @@
+/*
+ * Stack trace management functions
+ *
+ * Copyright (C) 2009 Helge Deller <deller@gmx.de>
+ * based on arch/x86/kernel/stacktrace.c by Ingo Molnar <mingo@redhat.com>
+ * and parisc unwind functions by Randolph Chung <tausq@debian.org>
+ *
+ * TODO: Userspace stacktrace (CONFIG_USER_STACKTRACE_SUPPORT)
+ */
+#include <linux/module.h>
+#include <linux/stacktrace.h>
+
+#include <asm/unwind.h>
+
+static void dump_trace(struct task_struct *task, struct stack_trace *trace)
+{
+ struct unwind_frame_info info;
+
+ /* initialize unwind info */
+ if (task == current) {
+ unsigned long sp;
+ struct pt_regs r;
+HERE:
+ asm volatile ("copy %%r30, %0" : "=r"(sp));
+ memset(&r, 0, sizeof(struct pt_regs));
+ r.iaoq[0] = (unsigned long)&&HERE;
+ r.gr[2] = (unsigned long)__builtin_return_address(0);
+ r.gr[30] = sp;
+ unwind_frame_init(&info, task, &r);
+ } else {
+ unwind_frame_init_from_blocked_task(&info, task);
+ }
+
+ /* unwind stack and save entries in stack_trace struct */
+ trace->nr_entries = 0;
+ while (trace->nr_entries < trace->max_entries) {
+ if (unwind_once(&info) < 0 || info.ip == 0)
+ break;
+
+ if (__kernel_text_address(info.ip))
+ trace->entries[trace->nr_entries++] = info.ip;
+ }
+}
+
+
+/*
+ * Save stack-backtrace addresses into a stack_trace buffer.
+ */
+void save_stack_trace(struct stack_trace *trace)
+{
+ dump_trace(current, trace);
+ if (trace->nr_entries < trace->max_entries)
+ trace->entries[trace->nr_entries++] = ULONG_MAX;
+}
+EXPORT_SYMBOL_GPL(save_stack_trace);
+
+void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
+{
+ dump_trace(tsk, trace);
+ if (trace->nr_entries < trace->max_entries)
+ trace->entries[trace->nr_entries++] = ULONG_MAX;
+}
+EXPORT_SYMBOL_GPL(save_stack_trace_tsk);
diff --git a/arch/parisc/kernel/syscall.S b/arch/parisc/kernel/syscall.S
index 69b6eebc466e..59fc1a43ec3e 100644
--- a/arch/parisc/kernel/syscall.S
+++ b/arch/parisc/kernel/syscall.S
@@ -365,17 +365,51 @@ tracesys_sigexit:
/*********************************************************
- Light-weight-syscall code
+ 32/64-bit Light-Weight-Syscall ABI
- r20 - lws number
- r26,r25,r24,r23,r22 - Input registers
- r28 - Function return register
- r21 - Error code.
+ * - Indicates a hint for userspace inline asm
+ implementations.
- Scracth: Any of the above that aren't being
- currently used, including r1.
+ Syscall number (caller-saves)
+ - %r20
+ * In asm clobber.
- Return pointer: r31 (Not usable)
+ Argument registers (caller-saves)
+ - %r26, %r25, %r24, %r23, %r22
+ * In asm input.
+
+ Return registers (caller-saves)
+ - %r28 (return), %r21 (errno)
+ * In asm output.
+
+ Caller-saves registers
+ - %r1, %r27, %r29
+ - %r2 (return pointer)
+ - %r31 (ble link register)
+ * In asm clobber.
+
+ Callee-saves registers
+ - %r3-%r18
+ - %r30 (stack pointer)
+ * Not in asm clobber.
+
+ If userspace is 32-bit:
+ Callee-saves registers
+ - %r19 (32-bit PIC register)
+
+ Differences from 32-bit calling convention:
+ - Syscall number in %r20
+ - Additional argument register %r22 (arg4)
+ - Callee-saves %r19.
+
+ If userspace is 64-bit:
+ Callee-saves registers
+ - %r27 (64-bit PIC register)
+
+ Differences from 64-bit calling convention:
+ - Syscall number in %r20
+ - Additional argument register %r22 (arg4)
+ - Callee-saves %r27.
Error codes returned by entry path:
@@ -473,7 +507,8 @@ lws_compare_and_swap64:
b,n lws_compare_and_swap
#else
/* If we are not a 64-bit kernel, then we don't
- * implement having 64-bit input registers
+ * have 64-bit input registers, and calling
+ * the 64-bit LWS CAS returns ENOSYS.
*/
b,n lws_exit_nosys
#endif
@@ -635,12 +670,15 @@ END(sys_call_table64)
/*
All light-weight-syscall atomic operations
will use this set of locks
+
+ NOTE: The lws_lock_start symbol must be
+ at least 16-byte aligned for safe use
+ with ldcw.
*/
.section .data
.align PAGE_SIZE
ENTRY(lws_lock_start)
/* lws locks */
- .align 16
.rept 16
/* Keep locks aligned at 16-bytes */
.word 1
diff --git a/arch/parisc/kernel/time.c b/arch/parisc/kernel/time.c
index 9d46c43a4152..d4dd05674c62 100644
--- a/arch/parisc/kernel/time.c
+++ b/arch/parisc/kernel/time.c
@@ -24,6 +24,7 @@
#include <linux/profile.h>
#include <linux/clocksource.h>
#include <linux/platform_device.h>
+#include <linux/ftrace.h>
#include <asm/uaccess.h>
#include <asm/io.h>
@@ -53,7 +54,7 @@ static unsigned long clocktick __read_mostly; /* timer cycles per tick */
* held off for an arbitrarily long period of time by interrupts being
* disabled, so we may miss one or more ticks.
*/
-irqreturn_t timer_interrupt(int irq, void *dev_id)
+irqreturn_t __irq_entry timer_interrupt(int irq, void *dev_id)
{
unsigned long now;
unsigned long next_tick;
@@ -216,17 +217,14 @@ void __init start_cpu_itimer(void)
per_cpu(cpu_data, cpu).it_value = next_tick;
}
-struct platform_device rtc_parisc_dev = {
- .name = "rtc-parisc",
+static struct platform_device rtc_generic_dev = {
+ .name = "rtc-generic",
.id = -1,
};
static int __init rtc_init(void)
{
- int ret;
-
- ret = platform_device_register(&rtc_parisc_dev);
- if (ret < 0)
+ if (platform_device_register(&rtc_generic_dev) < 0)
printk(KERN_ERR "unable to register rtc device...\n");
/* not necessarily an error */
diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c
index ba658d2086f7..c32f5d6d778e 100644
--- a/arch/parisc/kernel/traps.c
+++ b/arch/parisc/kernel/traps.c
@@ -247,6 +247,8 @@ void die_if_kernel(char *str, struct pt_regs *regs, long err)
oops_in_progress = 1;
+ oops_enter();
+
/* Amuse the user in a SPARC fashion */
if (err) printk(
KERN_CRIT " _______________________________ \n"
@@ -293,6 +295,7 @@ KERN_CRIT " || ||\n");
panic("Fatal exception");
}
+ oops_exit();
do_exit(SIGSEGV);
}
@@ -494,7 +497,7 @@ void parisc_terminate(char *msg, struct pt_regs *regs, int code, unsigned long o
panic(msg);
}
-void handle_interruption(int code, struct pt_regs *regs)
+void notrace handle_interruption(int code, struct pt_regs *regs)
{
unsigned long fault_address = 0;
unsigned long fault_space = 0;
diff --git a/arch/parisc/kernel/vmlinux.lds.S b/arch/parisc/kernel/vmlinux.lds.S
index 1a3b6ccd3620..fd2cc4fd2b65 100644
--- a/arch/parisc/kernel/vmlinux.lds.S
+++ b/arch/parisc/kernel/vmlinux.lds.S
@@ -54,6 +54,8 @@ SECTIONS
TEXT_TEXT
SCHED_TEXT
LOCK_TEXT
+ KPROBES_TEXT
+ IRQENTRY_TEXT
*(.text.do_softirq)
*(.text.sys_exit)
*(.text.do_sigaltstack)
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-20 04:13:20 +0000