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Diffstat (limited to 'arch')
-rw-r--r--arch/sh/kernel/process_32.c9
-rw-r--r--arch/sh/kernel/process_64.c10
-rw-r--r--arch/sh/kernel/sys_sh.c2
-rw-r--r--arch/sh/mm/fault_32.c57
4 files changed, 50 insertions, 28 deletions
diff --git a/arch/sh/kernel/process_32.c b/arch/sh/kernel/process_32.c
index 914e543102d..7b013aa8c43 100644
--- a/arch/sh/kernel/process_32.c
+++ b/arch/sh/kernel/process_32.c
@@ -169,6 +169,7 @@ __asm__(".align 5\n"
int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
{
struct pt_regs regs;
+ int pid;
memset(&regs, 0, sizeof(regs));
regs.regs[4] = (unsigned long)arg;
@@ -178,8 +179,12 @@ int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
regs.sr = (1 << 30);
/* Ok, create the new process.. */
- return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0,
- &regs, 0, NULL, NULL);
+ pid = do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0,
+ &regs, 0, NULL, NULL);
+
+ trace_mark(kernel_arch_kthread_create, "pid %d fn %p", pid, fn);
+
+ return pid;
}
/*
diff --git a/arch/sh/kernel/process_64.c b/arch/sh/kernel/process_64.c
index d0dddc438c0..b7aa09235b5 100644
--- a/arch/sh/kernel/process_64.c
+++ b/arch/sh/kernel/process_64.c
@@ -396,6 +396,7 @@ ATTRIB_NORET void kernel_thread_helper(void *arg, int (*fn)(void *))
int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
{
struct pt_regs regs;
+ int pid;
memset(&regs, 0, sizeof(regs));
regs.regs[2] = (unsigned long)arg;
@@ -404,8 +405,13 @@ int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
regs.pc = (unsigned long)kernel_thread_helper;
regs.sr = (1 << 30);
- return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0,
- &regs, 0, NULL, NULL);
+ /* Ok, create the new process.. */
+ pid = do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0,
+ &regs, 0, NULL, NULL);
+
+ trace_mark(kernel_arch_kthread_create, "pid %d fn %p", pid, fn);
+
+ return pid;
}
/*
diff --git a/arch/sh/kernel/sys_sh.c b/arch/sh/kernel/sys_sh.c
index 0dfb88925ad..38f098c9c72 100644
--- a/arch/sh/kernel/sys_sh.c
+++ b/arch/sh/kernel/sys_sh.c
@@ -171,6 +171,8 @@ asmlinkage int sys_ipc(uint call, int first, int second,
version = call >> 16; /* hack for backward compatibility */
call &= 0xffff;
+ trace_mark(kernel_arch_ipc_call, "call %u first %d", call, first);
+
if (call <= SEMTIMEDOP)
switch (call) {
case SEMOP:
diff --git a/arch/sh/mm/fault_32.c b/arch/sh/mm/fault_32.c
index 08a08ea5d69..898d477e47c 100644
--- a/arch/sh/mm/fault_32.c
+++ b/arch/sh/mm/fault_32.c
@@ -15,28 +15,13 @@
#include <linux/mm.h>
#include <linux/hardirq.h>
#include <linux/kprobes.h>
+#include <linux/marker.h>
#include <asm/io_trapped.h>
#include <asm/system.h>
#include <asm/mmu_context.h>
#include <asm/tlbflush.h>
#include <asm/kgdb.h>
-static inline int notify_page_fault(struct pt_regs *regs, int trap)
-{
- int ret = 0;
-
-#ifdef CONFIG_KPROBES
- if (!user_mode(regs)) {
- preempt_disable();
- if (kprobe_running() && kprobe_fault_handler(regs, trap))
- ret = 1;
- preempt_enable();
- }
-#endif
-
- return ret;
-}
-
/*
* This routine handles page faults. It determines the address,
* and the problem, and then passes it off to one of the appropriate
@@ -261,6 +246,25 @@ do_sigbus:
goto no_context;
}
+static inline int notify_page_fault(struct pt_regs *regs, int trap)
+{
+ int ret = 0;
+
+ trace_mark(kernel_arch_trap_entry, "trap_id %d ip #p%ld",
+ trap >> 5, instruction_pointer(regs));
+
+#ifdef CONFIG_KPROBES
+ if (!user_mode(regs)) {
+ preempt_disable();
+ if (kprobe_running() && kprobe_fault_handler(regs, trap))
+ ret = 1;
+ preempt_enable();
+ }
+#endif
+
+ return ret;
+}
+
#ifdef CONFIG_SH_STORE_QUEUES
/*
* This is a special case for the SH-4 store queues, as pages for this
@@ -284,15 +288,18 @@ asmlinkage int __kprobes __do_page_fault(struct pt_regs *regs,
pmd_t *pmd;
pte_t *pte;
pte_t entry;
+ int ret = 0;
if (notify_page_fault(regs, lookup_exception_vector()))
- return 0;
+ goto out;
#ifdef CONFIG_SH_KGDB
if (kgdb_nofault && kgdb_bus_err_hook)
kgdb_bus_err_hook();
#endif
+ ret = 1;
+
/*
* We don't take page faults for P1, P2, and parts of P4, these
* are always mapped, whether it be due to legacy behaviour in
@@ -302,24 +309,23 @@ asmlinkage int __kprobes __do_page_fault(struct pt_regs *regs,
pgd = pgd_offset_k(address);
} else {
if (unlikely(address >= TASK_SIZE || !current->mm))
- return 1;
+ goto out;
pgd = pgd_offset(current->mm, address);
}
pud = pud_offset(pgd, address);
if (pud_none_or_clear_bad(pud))
- return 1;
+ goto out;
pmd = pmd_offset(pud, address);
if (pmd_none_or_clear_bad(pmd))
- return 1;
-
+ goto out;
pte = pte_offset_kernel(pmd, address);
entry = *pte;
if (unlikely(pte_none(entry) || pte_not_present(entry)))
- return 1;
+ goto out;
if (unlikely(writeaccess && !pte_write(entry)))
- return 1;
+ goto out;
if (writeaccess)
entry = pte_mkdirty(entry);
@@ -336,5 +342,8 @@ asmlinkage int __kprobes __do_page_fault(struct pt_regs *regs,
set_pte(pte, entry);
update_mmu_cache(NULL, address, entry);
- return 0;
+ ret = 0;
+out:
+ trace_mark(kernel_arch_trap_exit, MARK_NOARGS);
+ return ret;
}