diff options
| -rw-r--r-- | arch/sh/kernel/process_32.c | 9 | ||||
| -rw-r--r-- | arch/sh/kernel/process_64.c | 10 | ||||
| -rw-r--r-- | arch/sh/kernel/sys_sh.c | 2 | ||||
| -rw-r--r-- | arch/sh/mm/fault_32.c | 57 |
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(®s, 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, - ®s, 0, NULL, NULL); + pid = do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, + ®s, 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(®s, 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, - ®s, 0, NULL, NULL); + /* Ok, create the new process.. */ + pid = do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, + ®s, 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; } |