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| author | Justus Fasse <justus.fasse@etu.univ-grenoble-alpes.fr> | 2020-07-15 08:29:11 +0200 |
|---|---|---|
| committer | Justus Fasse <justus.fasse@etu.univ-grenoble-alpes.fr> | 2020-07-15 08:29:11 +0200 |
| commit | d83bdbfb0f32f41fd979d37d6972e92c2f27325c (patch) | |
| tree | dfa5a0fe80df015547ec6a876a6677967410ae96 /aarch64/Asmgen.v | |
| parent | c48fd3f91f6dc9a35c7c9cb4a4b21d0598d91930 (diff) | |
| download | compcert-kvx-d83bdbfb0f32f41fd979d37d6972e92c2f27325c.tar.gz compcert-kvx-d83bdbfb0f32f41fd979d37d6972e92c2f27325c.zip | |
"we must check that the generated code contains less than [2^32] instructions otherwise the offset part of the [PC] code pointer could wrap around, leading to incorrect executions"
-- From the original aarch64/Asmgen.v
Diffstat (limited to 'aarch64/Asmgen.v')
| -rw-r--r-- | aarch64/Asmgen.v | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/aarch64/Asmgen.v b/aarch64/Asmgen.v index ec680478..a3b21a88 100644 --- a/aarch64/Asmgen.v +++ b/aarch64/Asmgen.v @@ -336,8 +336,9 @@ Fixpoint unfold (bbs: Asmblock.bblocks) : res Asm.code := Definition transf_function (f: Asmblock.function) : res Asm.function := do c <- unfold (Asmblock.fn_blocks f); - OK {| Asm.fn_sig := Asmblock.fn_sig f - ; Asm.fn_code := c |}. + if zlt Ptrofs.max_unsigned (Z.of_nat (length c)) + then Error (msg "Asmgen.trans_function: code size exceeded") + else OK {| Asm.fn_sig := Asmblock.fn_sig f; Asm.fn_code := c |}. Definition transf_fundef (f: Asmblock.fundef) : res Asm.fundef := transf_partial_fundef transf_function f. |