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| author | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2015-09-23 18:07:56 +0000 |
|---|---|---|
| committer | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2015-09-23 18:07:56 +0000 |
| commit | a2002b08f7bd0e165a14a91322acf917bb6c52ea (patch) | |
| tree | 4c769bbd2e49b5618af12131e59539102908680a /llvm/test/Transforms/SafeStack/ARM | |
| parent | b14ecd34f73d8d5414dd6705d0d365eb873889ab (diff) | |
| download | bcm5719-llvm-a2002b08f7bd0e165a14a91322acf917bb6c52ea.tar.gz bcm5719-llvm-a2002b08f7bd0e165a14a91322acf917bb6c52ea.zip | |
Android support for SafeStack.
Add two new ways of accessing the unsafe stack pointer:
* At a fixed offset from the thread TLS base. This is very similar to
StackProtector cookies, but we plan to extend it to other backends
(ARM in particular) soon. Bionic-side implementation here:
https://android-review.googlesource.com/170988.
* Via a function call, as a fallback for platforms that provide
neither a fixed TLS slot, nor a reasonable TLS implementation (i.e.
not emutls).
This is a re-commit of a change in r248357 that was reverted in
r248358.
llvm-svn: 248405
Diffstat (limited to 'llvm/test/Transforms/SafeStack/ARM')
| -rw-r--r-- | llvm/test/Transforms/SafeStack/ARM/abi.ll | 18 | ||||
| -rw-r--r-- | llvm/test/Transforms/SafeStack/ARM/lit.local.cfg | 3 |
2 files changed, 21 insertions, 0 deletions
diff --git a/llvm/test/Transforms/SafeStack/ARM/abi.ll b/llvm/test/Transforms/SafeStack/ARM/abi.ll new file mode 100644 index 00000000000..e33c913ae91 --- /dev/null +++ b/llvm/test/Transforms/SafeStack/ARM/abi.ll @@ -0,0 +1,18 @@ +; RUN: opt -safe-stack -S -mtriple=arm-linux-android < %s -o - | FileCheck %s + + +define void @foo() nounwind uwtable safestack { +entry: +; CHECK: %[[SPA:.*]] = call i8** @__safestack_pointer_address() +; CHECK: %[[USP:.*]] = load i8*, i8** %[[SPA]] +; CHECK: %[[USST:.*]] = getelementptr i8, i8* %[[USP]], i32 -16 +; CHECK: store i8* %[[USST]], i8** %[[SPA]] + + %a = alloca i8, align 8 + call void @Capture(i8* %a) + +; CHECK: store i8* %[[USP]], i8** %[[SPA]] + ret void +} + +declare void @Capture(i8*) diff --git a/llvm/test/Transforms/SafeStack/ARM/lit.local.cfg b/llvm/test/Transforms/SafeStack/ARM/lit.local.cfg new file mode 100644 index 00000000000..98c6700c209 --- /dev/null +++ b/llvm/test/Transforms/SafeStack/ARM/lit.local.cfg @@ -0,0 +1,3 @@ +if not 'ARM' in config.root.targets: + config.unsupported = True + |
