Messages in this thread Patch in this message | | | From | "Huang, Kai" <> | Subject | Re: [PATCH v4 12/13] selftests/sgx: Remove redundant enclave base address save/restore | Date | Tue, 29 Aug 2023 11:00:35 +0000 |
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On Fri, 2023-08-25 at 15:32 +0200, Jo Van Bulck wrote: > Remove redundant push/pop pair that stores and restores the enclave base > address in the test enclave, as it is never used after the pop and can > anyway be easily retrieved via the __encl_base symbol. > > Signed-off-by: Jo Van Bulck <jo.vanbulck@cs.kuleuven.be>
Acked-by: Kai Huang <kai.huang@intel.com>
Nit below...
> --- > tools/testing/selftests/sgx/test_encl_bootstrap.S | 3 --- > 1 file changed, 3 deletions(-) > > diff --git a/tools/testing/selftests/sgx/test_encl_bootstrap.S b/tools/testing/selftests/sgx/test_encl_bootstrap.S > index 4e55d91566c4..28fe5d2ac0af 100644 > --- a/tools/testing/selftests/sgx/test_encl_bootstrap.S > +++ b/tools/testing/selftests/sgx/test_encl_bootstrap.S > @@ -58,12 +58,9 @@ encl_entry_core: > push %rax > > push %rcx # push the address after EENTER > - push %rbx # push the enclave base address > > call encl_body > > - pop %rbx # pop the enclave base address > - > /* Clear volatile GPRs, except RAX (EEXIT function). */ > xor %rcx, %rcx > xor %rdx, %rdx
... please move this patch before patch 2?
Otherwise, strictly speaking patch 2 isn't complete, because after you apply patch 2 you still have this code which is obviously wrong -- %rbx is no longer enclave base address (although it never was even in the current upstream code).
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