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arm64: Add uprobe support

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This patch adds support for uprobe on ARM64 architecture.

Unit tests for following have been done so far and they have been found
working
    1. Step-able instructions, like sub, ldr, add etc.
    2. Simulation-able like ret, cbnz, cbz etc.
    3. uretprobe
    4. Reject-able instructions like sev, wfe etc.
    5. trapped and abort xol path
    6. probe at unaligned user address.
    7. longjump test cases

Currently it does not support aarch32 instruction probing.

Signed-off-by: Pratyush Anand <panand@redhat.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Pratyush Anand
2016-11-02 14:40:46 +05:30
committed by Catalin Marinas
parent 06beb72fbe
commit 9842ceae9f
10 changed files with 277 additions and 2 deletions
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1
arch/arm64/include/asm/cacheflush.h
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@@ -71,6 +71,7 @@ extern void __flush_dcache_area(void *addr, size_t len);
extern void __clean_dcache_area_poc(void *addr, size_t len);
extern void __clean_dcache_area_pou(void *addr, size_t len);
extern long __flush_cache_user_range(unsigned long start, unsigned long end);
extern void sync_icache_aliases(void *kaddr, unsigned long len);
static inline void flush_cache_mm(struct mm_struct *mm)
{