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authorPratyush Anand <panand@redhat.com>2014-12-30 17:07:12 +0530
committerSteven Capper <steve.capper@linaro.org>2015-04-07 12:58:39 +0100
commitfb4e988f3d1a0868a44e430933c4297619e93304 (patch)
tree7bc941cd3bf46369ba988e59a64db2faf6bf10ef /arch/arm64/mm/flush.c
parentca722ab33771c09965172e81f77a1b4b18ed104e (diff)
downloadlinux-fb4e988f3d1a0868a44e430933c4297619e93304.tar.gz
ARM64: Add uprobe support
This patch adds support for uprobe on ARM64 architecture. Unit test for following has been done so far and they have been found working 1. Step-able instructions, like sub, ldr, add etc. 2. Simulation-able like ret. 3. uretprobe 4. Reject-able instructions like sev, wfe etc. 5. trapped and abort xol path 6. probe at unaligned user address. Currently it does not support aarch32 instruction probing. Signed-off-by: Pratyush Anand <panand@redhat.com> Signed-off-by: Steve Capper <steve.capper@linaro.org>
Diffstat (limited to 'arch/arm64/mm/flush.c')
-rw-r--r--arch/arm64/mm/flush.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm64/mm/flush.c b/arch/arm64/mm/flush.c
index 9a4dd6f39cf..04fe6671907 100644
--- a/arch/arm64/mm/flush.c
+++ b/arch/arm64/mm/flush.c
@@ -55,6 +55,12 @@ static void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
__flush_ptrace_access(page, uaddr, kaddr, len);
}
+void flush_uprobe_xol_access(struct page *page, unsigned long uaddr,
+ void *kaddr, unsigned long len)
+{
+ __flush_ptrace_access(page, uaddr, kaddr, len);
+}
+
/*
* Copy user data from/to a page which is mapped into a different processes
* address space. Really, we want to allow our "user space" model to handle