Commit 9960e9e8 authored by David S. Miller's avatar David S. Miller

sparc64: Add function graph tracer support.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a71d1d6b
......@@ -37,6 +37,8 @@ config SPARC64
def_bool 64BIT
select ARCH_SUPPORTS_MSI
select HAVE_FUNCTION_TRACER
select HAVE_FUNCTION_GRAPH_TRACER
select HAVE_FUNCTION_GRAPH_FP_TEST
select HAVE_FUNCTION_TRACE_MCOUNT_TEST
select HAVE_KRETPROBES
select HAVE_KPROBES
......
......@@ -93,6 +93,7 @@ obj-$(CONFIG_KGDB) += kgdb_$(BITS).o
obj-$(CONFIG_DYNAMIC_FTRACE) += ftrace.o
obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o
obj-$(CONFIG_EARLYFB) += btext.o
obj-$(CONFIG_STACKTRACE) += stacktrace.o
......
......@@ -91,3 +91,61 @@ int __init ftrace_dyn_arch_init(void *data)
return 0;
}
#endif
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
#ifdef CONFIG_DYNAMIC_FTRACE
extern void ftrace_graph_call(void);
int ftrace_enable_ftrace_graph_caller(void)
{
unsigned long ip = (unsigned long)(&ftrace_graph_call);
u32 old, new;
old = *(u32 *) &ftrace_graph_call;
new = ftrace_call_replace(ip, (unsigned long) &ftrace_graph_caller);
return ftrace_modify_code(ip, old, new);
}
int ftrace_disable_ftrace_graph_caller(void)
{
unsigned long ip = (unsigned long)(&ftrace_graph_call);
u32 old, new;
old = *(u32 *) &ftrace_graph_call;
new = ftrace_call_replace(ip, (unsigned long) &ftrace_stub);
return ftrace_modify_code(ip, old, new);
}
#endif /* !CONFIG_DYNAMIC_FTRACE */
/*
* Hook the return address and push it in the stack of return addrs
* in current thread info.
*/
unsigned long prepare_ftrace_return(unsigned long parent,
unsigned long self_addr,
unsigned long frame_pointer)
{
unsigned long return_hooker = (unsigned long) &return_to_handler;
struct ftrace_graph_ent trace;
if (unlikely(atomic_read(&current->tracing_graph_pause)))
return parent + 8UL;
if (ftrace_push_return_trace(parent, self_addr, &trace.depth,
frame_pointer) == -EBUSY)
return parent + 8UL;
trace.func = self_addr;
/* Only trace if the calling function expects to */
if (!ftrace_graph_entry(&trace)) {
current->curr_ret_stack--;
return parent + 8UL;
}
return return_hooker;
}
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
......@@ -20,6 +20,7 @@
#include <linux/delay.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/ftrace.h>
#include <linux/irq.h>
#include <asm/ptrace.h>
......@@ -721,7 +722,7 @@ static __attribute__((always_inline)) void restore_hardirq_stack(void *orig_sp)
__asm__ __volatile__("mov %0, %%sp" : : "r" (orig_sp));
}
void handler_irq(int irq, struct pt_regs *regs)
void __irq_entry handler_irq(int irq, struct pt_regs *regs)
{
unsigned long pstate, bucket_pa;
struct pt_regs *old_regs;
......
......@@ -5,6 +5,7 @@
#include <linux/kgdb.h>
#include <linux/kdebug.h>
#include <linux/ftrace.h>
#include <asm/kdebug.h>
#include <asm/ptrace.h>
......@@ -108,7 +109,7 @@ void gdb_regs_to_pt_regs(unsigned long *gdb_regs, struct pt_regs *regs)
}
#ifdef CONFIG_SMP
void smp_kgdb_capture_client(int irq, struct pt_regs *regs)
void __irq_entry smp_kgdb_capture_client(int irq, struct pt_regs *regs)
{
unsigned long flags;
......
......@@ -8,6 +8,7 @@
#include <linux/irq.h>
#include <linux/perf_event.h>
#include <linux/ftrace.h>
#include <asm/pil.h>
#include <asm/pcr.h>
......@@ -34,7 +35,7 @@ unsigned int picl_shift;
* Therefore in such situations we defer the work by signalling
* a lower level cpu IRQ.
*/
void deferred_pcr_work_irq(int irq, struct pt_regs *regs)
void __irq_entry deferred_pcr_work_irq(int irq, struct pt_regs *regs)
{
struct pt_regs *old_regs;
......
......@@ -22,6 +22,7 @@
#include <linux/profile.h>
#include <linux/bootmem.h>
#include <linux/vmalloc.h>
#include <linux/ftrace.h>
#include <linux/cpu.h>
#include <asm/head.h>
......@@ -822,13 +823,13 @@ void arch_send_call_function_single_ipi(int cpu)
&cpumask_of_cpu(cpu));
}
void smp_call_function_client(int irq, struct pt_regs *regs)
void __irq_entry smp_call_function_client(int irq, struct pt_regs *regs)
{
clear_softint(1 << irq);
generic_smp_call_function_interrupt();
}
void smp_call_function_single_client(int irq, struct pt_regs *regs)
void __irq_entry smp_call_function_single_client(int irq, struct pt_regs *regs)
{
clear_softint(1 << irq);
generic_smp_call_function_single_interrupt();
......@@ -964,7 +965,7 @@ void flush_dcache_page_all(struct mm_struct *mm, struct page *page)
put_cpu();
}
void smp_new_mmu_context_version_client(int irq, struct pt_regs *regs)
void __irq_entry smp_new_mmu_context_version_client(int irq, struct pt_regs *regs)
{
struct mm_struct *mm;
unsigned long flags;
......@@ -1148,7 +1149,7 @@ void smp_release(void)
*/
extern void prom_world(int);
void smp_penguin_jailcell(int irq, struct pt_regs *regs)
void __irq_entry smp_penguin_jailcell(int irq, struct pt_regs *regs)
{
clear_softint(1 << irq);
......@@ -1364,7 +1365,7 @@ void smp_send_reschedule(int cpu)
&cpumask_of_cpu(cpu));
}
void smp_receive_signal_client(int irq, struct pt_regs *regs)
void __irq_entry smp_receive_signal_client(int irq, struct pt_regs *regs)
{
clear_softint(1 << irq);
}
......
......@@ -35,6 +35,7 @@
#include <linux/clocksource.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/ftrace.h>
#include <asm/oplib.h>
#include <asm/timer.h>
......@@ -717,7 +718,7 @@ static struct clock_event_device sparc64_clockevent = {
};
static DEFINE_PER_CPU(struct clock_event_device, sparc64_events);
void timer_interrupt(int irq, struct pt_regs *regs)
void __irq_entry timer_interrupt(int irq, struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
unsigned long tick_mask = tick_ops->softint_mask;
......
......@@ -46,6 +46,7 @@ SECTIONS
SCHED_TEXT
LOCK_TEXT
KPROBES_TEXT
IRQENTRY_TEXT
*(.gnu.warning)
} = 0
_etext = .;
......
......@@ -26,22 +26,42 @@ mcount:
#else
sethi %hi(function_trace_stop), %g1
lduw [%g1 + %lo(function_trace_stop)], %g2
brnz,pn %g2, 1f
brnz,pn %g2, 2f
sethi %hi(ftrace_trace_function), %g1
sethi %hi(ftrace_stub), %g2
ldx [%g1 + %lo(ftrace_trace_function)], %g1
or %g2, %lo(ftrace_stub), %g2
cmp %g1, %g2
be,pn %icc, 1f
mov %i7, %g2
mov %i7, %g3
save %sp, -128, %sp
mov %g2, %o1
mov %g3, %o1
jmpl %g1, %o7
mov %i7, %o0
ret
restore
/* not reached */
1:
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
sethi %hi(ftrace_graph_return), %g1
ldx [%g1 + %lo(ftrace_graph_return)], %g3
cmp %g2, %g3
bne,pn %xcc, 5f
sethi %hi(ftrace_graph_entry_stub), %g2
sethi %hi(ftrace_graph_entry), %g1
or %g2, %lo(ftrace_graph_entry_stub), %g2
ldx [%g1 + %lo(ftrace_graph_entry)], %g1
cmp %g1, %g2
be,pt %xcc, 2f
nop
5: mov %i7, %g2
mov %fp, %g3
save %sp, -128, %sp
mov %g2, %l0
ba,pt %xcc, ftrace_graph_caller
mov %g3, %l1
#endif
2:
#endif
#endif
retl
......@@ -62,18 +82,48 @@ ftrace_stub:
ftrace_caller:
sethi %hi(function_trace_stop), %g1
mov %i7, %g2
lduw [%g1 + %lo(function_trace_stop)], %g3
brnz,pn %g3, ftrace_stub
nop
lduw [%g1 + %lo(function_trace_stop)], %g1
brnz,pn %g1, ftrace_stub
mov %fp, %g3
save %sp, -128, %sp
mov %g2, %o1
mov %g2, %l0
mov %g3, %l1
.globl ftrace_call
ftrace_call:
call ftrace_stub
mov %i7, %o0
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
.globl ftrace_graph_call
ftrace_graph_call:
call ftrace_stub
nop
#endif
ret
restore
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
.size ftrace_graph_call,.-ftrace_graph_call
#endif
.size ftrace_call,.-ftrace_call
.size ftrace_caller,.-ftrace_caller
#endif
#endif
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
ENTRY(ftrace_graph_caller)
mov %l0, %o0
mov %i7, %o1
call prepare_ftrace_return
mov %l1, %o2
ret
restore %o0, -8, %i7
END(ftrace_graph_caller)
ENTRY(return_to_handler)
save %sp, -128, %sp
call ftrace_return_to_handler
mov %fp, %o0
jmpl %o0 + 8, %g0
restore
END(return_to_handler)
#endif
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