Signed-off-by: Mathieu Desnoyers <[email protected]>
---
arch/mips/kernel/entry.S | 2 +-
arch/mips/kernel/process.c | 6 +++++-
arch/mips/kernel/ptrace.c | 7 +++++++
arch/mips/kernel/syscall.c | 2 ++
arch/mips/kernel/traps.c | 16 ++++++++++++----
arch/mips/kernel/unaligned.c | 11 ++++++++++-
arch/mips/mm/fault.c | 3 +++
include/asm-mips/mipsregs.h | 1 +
8 files changed, 41 insertions(+), 7 deletions(-)
Index: linux-2.6-lttng/arch/mips/kernel/process.c
===================================================================
--- linux-2.6-lttng.orig/arch/mips/kernel/process.c 2007-11-20 13:13:42.000000000 -0500
+++ linux-2.6-lttng/arch/mips/kernel/process.c 2007-11-20 13:19:04.000000000 -0500
@@ -226,6 +226,7 @@ static void __noreturn kernel_thread_hel
long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
{
struct pt_regs regs;
+ long pid;
memset(®s, 0, sizeof(regs));
@@ -241,7 +242,10 @@ long kernel_thread(int (*fn)(void *), vo
#endif
/* 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 %ld fn %p", pid, fn);
+ return pid;
}
/*
Index: linux-2.6-lttng/arch/mips/kernel/ptrace.c
===================================================================
--- linux-2.6-lttng.orig/arch/mips/kernel/ptrace.c 2007-11-20 13:13:42.000000000 -0500
+++ linux-2.6-lttng/arch/mips/kernel/ptrace.c 2007-11-20 13:19:52.000000000 -0500
@@ -466,6 +466,13 @@ static inline int audit_arch(void)
*/
asmlinkage void do_syscall_trace(struct pt_regs *regs, int entryexit)
{
+ if (!entryexit)
+ trace_mark(kernel_arch_syscall_entry, "syscall_id %d ip #p%ld",
+ (int)regs->regs[2], instruction_pointer(regs));
+ else
+ trace_mark(kernel_arch_syscall_exit, "ret %ld",
+ regs->regs[2]);
+
/* do the secure computing check first */
if (!entryexit)
secure_computing(regs->regs[0]);
Index: linux-2.6-lttng/arch/mips/kernel/syscall.c
===================================================================
--- linux-2.6-lttng.orig/arch/mips/kernel/syscall.c 2007-11-20 13:13:42.000000000 -0500
+++ linux-2.6-lttng/arch/mips/kernel/syscall.c 2007-11-20 13:19:04.000000000 -0500
@@ -327,6 +327,8 @@ asmlinkage int sys_ipc(unsigned int call
version = call >> 16; /* hack for backward compatibility */
call &= 0xffff;
+ trace_mark(kernel_arch_ipc_call, "call %u first %d", call, first);
+
switch (call) {
case SEMOP:
return sys_semtimedop(first, (struct sembuf __user *)ptr,
Index: linux-2.6-lttng/arch/mips/kernel/traps.c
===================================================================
--- linux-2.6-lttng.orig/arch/mips/kernel/traps.c 2007-11-20 13:13:42.000000000 -0500
+++ linux-2.6-lttng/arch/mips/kernel/traps.c 2007-11-20 13:19:04.000000000 -0500
@@ -293,7 +293,7 @@ static void __show_regs(const struct pt_
printk("Cause : %08x\n", cause);
- cause = (cause & CAUSEF_EXCCODE) >> CAUSEB_EXCCODE;
+ cause = CAUSE_EXCCODE(cause);
if (1 <= cause && cause <= 5)
printk("BadVA : %0*lx\n", field, regs->cp0_badvaddr);
@@ -587,6 +587,8 @@ asmlinkage void do_fpe(struct pt_regs *r
die_if_kernel("FP exception in kernel code", regs);
+ trace_mark(kernel_arch_trap_entry, "trap_id %lu ip #p%ld",
+ CAUSE_EXCCODE(regs->cp0_cause), instruction_pointer(regs));
if (fcr31 & FPU_CSR_UNI_X) {
int sig;
@@ -800,6 +802,9 @@ asmlinkage void do_cpu(struct pt_regs *r
unsigned int cpid;
int status;
+ trace_mark(kernel_arch_trap_entry, "trap_id %lu ip #p%ld",
+ CAUSE_EXCCODE(regs->cp0_cause), instruction_pointer(regs));
+
die_if_kernel("do_cpu invoked from kernel context!", regs);
cpid = (regs->cp0_cause >> CAUSEB_CE) & 3;
@@ -811,8 +816,10 @@ asmlinkage void do_cpu(struct pt_regs *r
opcode = 0;
status = -1;
- if (unlikely(compute_return_epc(regs) < 0))
+ if (unlikely(compute_return_epc(regs) < 0)) {
+ trace_mark(kernel_arch_trap_exit, MARK_NOARGS);
return;
+ }
if (unlikely(get_user(opcode, epc) < 0))
status = SIGSEGV;
@@ -830,7 +837,7 @@ asmlinkage void do_cpu(struct pt_regs *r
regs->cp0_epc = old_epc; /* Undo skip-over. */
force_sig(status, current);
}
-
+ trace_mark(kernel_arch_trap_exit, MARK_NOARGS);
return;
case 1:
@@ -850,7 +857,7 @@ asmlinkage void do_cpu(struct pt_regs *r
else
mt_ase_fp_affinity();
}
-
+ trace_mark(kernel_arch_trap_exit, MARK_NOARGS);
return;
case 2:
@@ -859,6 +866,7 @@ asmlinkage void do_cpu(struct pt_regs *r
}
force_sig(SIGILL, current);
+ trace_mark(kernel_arch_trap_exit, MARK_NOARGS);
}
asmlinkage void do_mdmx(struct pt_regs *regs)
Index: linux-2.6-lttng/arch/mips/kernel/unaligned.c
===================================================================
--- linux-2.6-lttng.orig/arch/mips/kernel/unaligned.c 2007-11-20 13:13:42.000000000 -0500
+++ linux-2.6-lttng/arch/mips/kernel/unaligned.c 2007-11-20 13:19:04.000000000 -0500
@@ -503,14 +503,19 @@ asmlinkage void do_ade(struct pt_regs *r
unsigned int __user *pc;
mm_segment_t seg;
+ trace_mark(kernel_arch_trap_entry, "trap_id %lu ip #p%ld",
+ CAUSE_EXCCODE(regs->cp0_cause), instruction_pointer(regs));
+
/*
* Address errors may be deliberately induced by the FPU emulator to
* retake control of the CPU after executing the instruction in the
* delay slot of an emulated branch.
*/
/* Terminate if exception was recognized as a delay slot return */
- if (do_dsemulret(regs))
+ if (do_dsemulret(regs)) {
+ trace_mark(kernel_arch_trap_exit, MARK_NOARGS);
return;
+ }
/* Otherwise handle as normal */
@@ -539,6 +544,8 @@ asmlinkage void do_ade(struct pt_regs *r
emulate_load_store_insn(regs, (void __user *)regs->cp0_badvaddr, pc);
set_fs(seg);
+ trace_mark(kernel_arch_trap_exit, MARK_NOARGS);
+
return;
sigbus:
@@ -548,6 +555,8 @@ sigbus:
/*
* XXX On return from the signal handler we should advance the epc
*/
+
+ trace_mark(kernel_arch_trap_exit, MARK_NOARGS);
}
#ifdef CONFIG_DEBUG_FS
Index: linux-2.6-lttng/include/asm-mips/mipsregs.h
===================================================================
--- linux-2.6-lttng.orig/include/asm-mips/mipsregs.h 2007-11-20 13:13:42.000000000 -0500
+++ linux-2.6-lttng/include/asm-mips/mipsregs.h 2007-11-20 13:19:04.000000000 -0500
@@ -384,6 +384,7 @@
*/
#define CAUSEB_EXCCODE 2
#define CAUSEF_EXCCODE (_ULCAST_(31) << 2)
+#define CAUSE_EXCCODE(cause) (((cause) & CAUSEF_EXCCODE) >> CAUSEB_EXCCODE)
#define CAUSEB_IP 8
#define CAUSEF_IP (_ULCAST_(255) << 8)
#define CAUSEB_IP0 8
Index: linux-2.6-lttng/arch/mips/mm/fault.c
===================================================================
--- linux-2.6-lttng.orig/arch/mips/mm/fault.c 2007-11-20 13:13:42.000000000 -0500
+++ linux-2.6-lttng/arch/mips/mm/fault.c 2007-11-20 13:19:04.000000000 -0500
@@ -103,7 +103,10 @@ survive:
* make sure we exit gracefully rather than endlessly redo
* the fault.
*/
+ trace_mark(kernel_arch_trap_entry, "trap_id %lu ip #p%ld",
+ CAUSE_EXCCODE(regs->cp0_cause), instruction_pointer(regs));
fault = handle_mm_fault(mm, vma, address, write);
+ trace_mark(kernel_arch_trap_exit, MARK_NOARGS);
if (unlikely(fault & VM_FAULT_ERROR)) {
if (fault & VM_FAULT_OOM)
goto out_of_memory;
Index: linux-2.6-lttng/arch/mips/kernel/entry.S
===================================================================
--- linux-2.6-lttng.orig/arch/mips/kernel/entry.S 2007-11-20 13:13:42.000000000 -0500
+++ linux-2.6-lttng/arch/mips/kernel/entry.S 2007-11-20 13:19:04.000000000 -0500
@@ -167,7 +167,7 @@ work_notifysig: # deal with pending s
FEXPORT(syscall_exit_work_partial)
SAVE_STATIC
syscall_exit_work:
- li t0, _TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT
+ li t0, _TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_KERNEL_TRACE
and t0, a2 # a2 is preloaded with TI_FLAGS
beqz t0, work_pending # trace bit set?
local_irq_enable # could let do_syscall_trace()
--
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
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