[RFC PATCH 4/4] powerpc: mm/slb: blacklist symbols from kprobe
From: Naveen N. Rao <hidden>
Date: 2016-11-17 15:09:32
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
We can't really take a trap at this point. So, blacklist these symbols. Reported-by: Anton Blanchard <redacted> Signed-off-by: Naveen N. Rao <redacted> --- arch/powerpc/mm/slb_low.S | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/arch/powerpc/mm/slb_low.S b/arch/powerpc/mm/slb_low.S
index c1c7456..c2bae92 100644
--- a/arch/powerpc/mm/slb_low.S
+++ b/arch/powerpc/mm/slb_low.S@@ -30,7 +30,7 @@ * r9, r10, r11 are clobbered by this function * No other registers are examined or changed. */ -_GLOBAL(slb_allocate_realmode) +_GLOBAL_NOKPROBE(slb_allocate_realmode) /* * check for bad kernel/user address * (ea & ~REGION_MASK) >= PGTABLE_RANGE
@@ -59,7 +59,7 @@ _GLOBAL(slb_allocate_realmode) /* Linear mapping encoding bits, the "li" instruction below will * be patched by the kernel at boot */ -_GLOBAL_SYM(slb_miss_kernel_load_linear) +_GLOBAL_SYM_NOKPROBE(slb_miss_kernel_load_linear) li r11,0 /* * context = (MAX_USER_CONTEXT) + ((ea >> 60) - 0xc) + 1
@@ -79,7 +79,7 @@ END_MMU_FTR_SECTION_IFCLR(MMU_FTR_1T_SEGMENT) /* Check virtual memmap region. To be patches at kernel boot */ cmpldi cr0,r9,0xf bne 1f -_GLOBAL_SYM(slb_miss_kernel_load_vmemmap) +_GLOBAL_SYM_NOKPROBE(slb_miss_kernel_load_vmemmap) li r11,0 b 6f 1:
@@ -95,7 +95,7 @@ _GLOBAL_SYM(slb_miss_kernel_load_vmemmap) b 6f 5: /* IO mapping */ -_GLOBAL_SYM(slb_miss_kernel_load_io) +_GLOBAL_SYM_NOKPROBE(slb_miss_kernel_load_io) li r11,0 6: /*
@@ -203,7 +203,7 @@ END_MMU_FTR_SECTION_IFSET(MMU_FTR_1T_SEGMENT) 7: ld r10,PACASTABRR(r13) addi r10,r10,1 /* This gets soft patched on boot. */ -_GLOBAL_SYM(slb_compare_rr_to_size) +_GLOBAL_SYM_NOKPROBE(slb_compare_rr_to_size) cmpldi r10,0 blt+ 4f
--
2.10.2