diff options
| author | Bharat Bhushan <r65777@freescale.com> | 2013-04-29 22:18:11 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-05-02 10:31:01 +1000 |
| commit | fc2a6cfe05a33891180a27d55983febe170bc0f8 (patch) | |
| tree | 174cf902c521dde8022ed23646cb35d44c29d9bc /arch/powerpc/kernel | |
| parent | 1f6aaaccb1b3af8613fe45781c1aefee2ae8c6b3 (diff) | |
powerpc: Fix interrupt range check on debug exception
We do not want to take single step and branch-taken debug exception
in kernel exception code. But the address range check was not covering
all kernel exception handlers address range.
With this patch we defined the interrupt_end label which defines the
end on kernel exception code. So now we check interrupt_base to
interrupt_end range for not handling debug exception in kernel
exception entry.
Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel')
| -rw-r--r-- | arch/powerpc/kernel/head_44x.S | 2 | ||||
| -rw-r--r-- | arch/powerpc/kernel/head_booke.h | 16 | ||||
| -rw-r--r-- | arch/powerpc/kernel/head_fsl_booke.S | 2 |
3 files changed, 12 insertions, 8 deletions
diff --git a/arch/powerpc/kernel/head_44x.S b/arch/powerpc/kernel/head_44x.S index 7a2e5e421abf..97e2671cde7f 100644 --- a/arch/powerpc/kernel/head_44x.S +++ b/arch/powerpc/kernel/head_44x.S @@ -769,6 +769,8 @@ finish_tlb_load_47x: */ DEBUG_CRIT_EXCEPTION +interrupt_end: + /* * Global functions */ diff --git a/arch/powerpc/kernel/head_booke.h b/arch/powerpc/kernel/head_booke.h index b3853504498d..a620203f7de3 100644 --- a/arch/powerpc/kernel/head_booke.h +++ b/arch/powerpc/kernel/head_booke.h @@ -281,13 +281,13 @@ label: andis. r10,r10,(DBSR_IC|DBSR_BT)@h; \ beq+ 2f; \ \ - lis r10,KERNELBASE@h; /* check if exception in vectors */ \ - ori r10,r10,KERNELBASE@l; \ + lis r10,interrupt_base@h; /* check if exception in vectors */ \ + ori r10,r10,interrupt_base@l; \ cmplw r12,r10; \ blt+ 2f; /* addr below exception vectors */ \ \ - lis r10,DebugDebug@h; \ - ori r10,r10,DebugDebug@l; \ + lis r10,interrupt_end@h; \ + ori r10,r10,interrupt_end@l; \ cmplw r12,r10; \ bgt+ 2f; /* addr above exception vectors */ \ \ @@ -334,13 +334,13 @@ label: andis. r10,r10,(DBSR_IC|DBSR_BT)@h; \ beq+ 2f; \ \ - lis r10,KERNELBASE@h; /* check if exception in vectors */ \ - ori r10,r10,KERNELBASE@l; \ + lis r10,interrupt_base@h; /* check if exception in vectors */ \ + ori r10,r10,interrupt_base@l; \ cmplw r12,r10; \ blt+ 2f; /* addr below exception vectors */ \ \ - lis r10,DebugCrit@h; \ - ori r10,r10,DebugCrit@l; \ + lis r10,interrupt_end@h; \ + ori r10,r10,interrupt_end@l; \ cmplw r12,r10; \ bgt+ 2f; /* addr above exception vectors */ \ \ diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S index 6f62a737f607..d10a7cacccd2 100644 --- a/arch/powerpc/kernel/head_fsl_booke.S +++ b/arch/powerpc/kernel/head_fsl_booke.S @@ -605,6 +605,8 @@ END_FTR_SECTION_IFSET(CPU_FTR_EMB_HV) /* Embedded Hypervisor Privilege */ EXCEPTION(0, HV_PRIV, Ehvpriv, unknown_exception, EXC_XFER_EE) +interrupt_end: + /* * Local functions */ |