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[docs] Don't use the `asm` syntax highlighting (which our docs builder 

errors on) and clean up the formattting.

This isn't actualy assembly anyways, so dropping the highlighting is
probably for the best.

llvm-svn: 338979
This commit is contained in:
Chandler Carruth 2018-08-06 01:28:42 +00:00
parent 343a87ac8d
commit 59f1e69d15
1 changed files with 9 additions and 9 deletions
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18
clang/docs/HardwareAssistedAddressSanitizerDesign.rst
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@ -47,21 +47,21 @@ All memory accesses are prefixed with an inline instruction sequence that
verifies the tags. Currently, the following sequence is used:
.. code-block:: asm
.. code-block:: none
// int foo(int *a) { return *a; }
// clang -O2 --target=aarch64-linux -fsanitize=hwaddress -c load.c
foo:
0: 08 00 00 90 adrp x8, 0 <__hwasan_shadow>
4: 08 01 40 f9 ldr x8, [x8] // shadow base (to be resolved by the loader)
8: 09 dc 44 d3 ubfx x9, x0, #4, #52 // shadow offset
c: 28 69 68 38 ldrb w8, [x9, x8] // load shadow tag
10: 09 fc 78 d3 lsr x9, x0, #56 // extract address tag
14: 3f 01 08 6b cmp w9, w8 // compare tags
18: 61 00 00 54 b.ne 24 // jump on mismatch
1c: 00 00 40 b9 ldr w0, [x0] // original load
4: 08 01 40 f9 ldr x8, [x8] // shadow base (to be resolved by the loader)
8: 09 dc 44 d3 ubfx x9, x0, #4, #52 // shadow offset
c: 28 69 68 38 ldrb w8, [x9, x8] // load shadow tag
10: 09 fc 78 d3 lsr x9, x0, #56 // extract address tag
14: 3f 01 08 6b cmp w9, w8 // compare tags
18: 61 00 00 54 b.ne 24 // jump on mismatch
1c: 00 00 40 b9 ldr w0, [x0] // original load
20: c0 03 5f d6 ret
24: 40 20 21 d4 brk #0x902 // trap
24: 40 20 21 d4 brk #0x902 // trap
Alternatively, memory accesses are prefixed with a function call.