[PATCH 10/12] powerpc/entry32: Blacklist exception entry points for kprobe.

[Christophe Leroy]

kprobe does not handle events happening in real mode.

As exception entry points are running with MMU disabled,
blacklist them.

Signed-off-by: Christophe Leroy <christophe.le...@c-s.fr>
---
 arch/powerpc/kernel/entry_32.S | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index 94f78c03cb79..9a1a45d6038a 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -51,6 +51,7 @@ mcheck_transfer_to_handler:
        mfspr   r0,SPRN_DSRR1
        stw     r0,_DSRR1(r11)
        /* fall through */
+_ASM_NOKPROBE_SYMBOL(mcheck_transfer_to_handler)
 
        .globl  debug_transfer_to_handler
 debug_transfer_to_handler:
@@ -59,6 +60,7 @@ debug_transfer_to_handler:
        mfspr   r0,SPRN_CSRR1
        stw     r0,_CSRR1(r11)
        /* fall through */
+_ASM_NOKPROBE_SYMBOL(debug_transfer_to_handler)
 
        .globl  crit_transfer_to_handler
 crit_transfer_to_handler:
@@ -94,6 +96,7 @@ crit_transfer_to_handler:
        rlwinm  r0,r1,0,0,(31 - THREAD_SHIFT)
        stw     r0,KSP_LIMIT(r8)
        /* fall through */
+_ASM_NOKPROBE_SYMBOL(crit_transfer_to_handler)
 #endif
 
 #ifdef CONFIG_40x
@@ -115,6 +118,7 @@ crit_transfer_to_handler:
        rlwinm  r0,r1,0,0,(31 - THREAD_SHIFT)
        stw     r0,KSP_LIMIT(r8)
        /* fall through */
+_ASM_NOKPROBE_SYMBOL(crit_transfer_to_handler)
 #endif
 
 /*
@@ -127,6 +131,7 @@ crit_transfer_to_handler:
        .globl  transfer_to_handler_full
 transfer_to_handler_full:
        SAVE_NVGPRS(r11)
+_ASM_NOKPROBE_SYMBOL(transfer_to_handler_full)
        /* fall through */
 
        .globl  transfer_to_handler
@@ -286,6 +291,8 @@ reenable_mmu:
        lwz     r2, GPR2(r11)
        b       fast_exception_return
 #endif
+_ASM_NOKPROBE_SYMBOL(transfer_to_handler)
+_ASM_NOKPROBE_SYMBOL(transfer_to_handler_cont)
 
 #ifndef CONFIG_VMAP_STACK
 /*
-- 
2.25.0