Simplify the test_encl_bootstrap.S flow by using rip-relative addressing. Compiler does the right thing here, and this removes dependency on where TCS entries need to be located in the binary, i.e. allows the binary layout changed freely in the future.
Cc: Reinette Chatre reinette.chatre@intel.com Cc: Dave Hansen dave.hansen@linux.intel.com Signed-off-by: Jarkko Sakkinen jarkko@kernel.org --- tools/testing/selftests/sgx/test_encl_bootstrap.S | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/tools/testing/selftests/sgx/test_encl_bootstrap.S b/tools/testing/selftests/sgx/test_encl_bootstrap.S index 82fb0dfcbd23..1c1b5c6c4ffe 100644 --- a/tools/testing/selftests/sgx/test_encl_bootstrap.S +++ b/tools/testing/selftests/sgx/test_encl_bootstrap.S @@ -40,11 +40,7 @@ .text
encl_entry: - # RBX contains the base address for TCS, which is the first address - # inside the enclave for TCS #1 and one page into the enclave for - # TCS #2. By adding the value of encl_stack to it, we get - # the absolute address for the stack. - lea (encl_stack)(%rbx), %rax + lea (encl_stack)(%rip), %rax xchg %rsp, %rax push %rax
Add a PT_NOTE section with n_namesz containg "TCS" and n_descz containing 32-bit offset to the TCS table inside the enclave. This allows to place the TCS segment freely, and thereby make the kselftest binary layout way more robust.
Cc: Reinette Chatre reinette.chatre@intel.com Cc: Dave Hansen <dave.hansen@linux.intel.com Signed-off-by: Jarkko Sakkinen jarkko@kernel.org --- v2: * Add RIP relative addressing fix for bootstrap as prepending patch, as this depends on it. * Moved TCS section as the last so that it is easy to add new TCS's, e.g dynamically with EAUG + EMODT, behind it. --- tools/testing/selftests/sgx/load.c | 56 ++++++++++++++----- tools/testing/selftests/sgx/main.c | 37 +++--------- tools/testing/selftests/sgx/main.h | 2 + tools/testing/selftests/sgx/test_encl.lds | 17 ++++-- .../selftests/sgx/test_encl_bootstrap.S | 7 +++ 5 files changed, 72 insertions(+), 47 deletions(-)
diff --git a/tools/testing/selftests/sgx/load.c b/tools/testing/selftests/sgx/load.c index 006b464c8fc9..214b9da631bd 100644 --- a/tools/testing/selftests/sgx/load.c +++ b/tools/testing/selftests/sgx/load.c @@ -19,6 +19,9 @@ #include "defines.h" #include "main.h"
+const char *TCS_NOTE_NAME = "TCS"; +const unsigned long TCS_NOTE_LEN = 4; + void encl_delete(struct encl *encl) { struct encl_segment *heap_seg; @@ -187,11 +190,31 @@ bool encl_load(const char *path, struct encl *encl, unsigned long heap_size)
encl->nr_segments = 1; /* one for the heap */
+ /* Count the loadable segments and discover the TCS array. */ for (i = 0; i < ehdr->e_phnum; i++) { Elf64_Phdr *phdr = &phdr_tbl[i]; + Elf64_Nhdr *note; + char *note_name;
- if (phdr->p_type == PT_LOAD) + switch (phdr->p_type) { + case PT_LOAD: encl->nr_segments++; + break; + + case PT_NOTE: + note = encl->bin + (phdr->p_offset & PAGE_MASK); + note_name = &((char *)note)[sizeof(*note)]; + + if (note->n_namesz == TCS_NOTE_LEN && + !strncmp(note_name, TCS_NOTE_NAME, TCS_NOTE_LEN)) { + /* 32-bit address. */ + encl->tcs = (struct sgx_tcs *)(unsigned long)(note->n_descsz); + } + break; + + default: + break; + } }
encl->segment_tbl = calloc(encl->nr_segments, @@ -215,31 +238,36 @@ bool encl_load(const char *path, struct encl *encl, unsigned long heap_size) goto err; }
- if (j == 0 && flags != (PF_R | PF_W)) { - fprintf(stderr, - "TCS has invalid segment flags 0x%02x.\n", - phdr->p_flags); - goto err; - } - if (j == 0) { src_offset = phdr->p_offset & PAGE_MASK; encl->src = encl->bin + src_offset; + } + + seg->offset = (phdr->p_offset & PAGE_MASK) - src_offset; + seg->size = (phdr->p_filesz + PAGE_SIZE - 1) & PAGE_MASK; + seg->src = encl->src + seg->offset; + seg->measure = true; + + if (seg->offset == (unsigned long)encl->tcs) { + if (flags != (PF_R | PF_W)) { + fprintf(stderr, + "TCS has invalid segment flags 0x%02x.\n", + phdr->p_flags); + goto err; + }
seg->prot = PROT_READ | PROT_WRITE; seg->flags = SGX_PAGE_TYPE_TCS << 8; } else { + if ((flags & (PF_R | PF_W | PF_X)) == (PF_R | PF_W)) + encl->data_offset = seg->offset; + seg->prot = (phdr->p_flags & PF_R) ? PROT_READ : 0; seg->prot |= (phdr->p_flags & PF_W) ? PROT_WRITE : 0; seg->prot |= (phdr->p_flags & PF_X) ? PROT_EXEC : 0; seg->flags = (SGX_PAGE_TYPE_REG << 8) | seg->prot; }
- seg->offset = (phdr->p_offset & PAGE_MASK) - src_offset; - seg->size = (phdr->p_filesz + PAGE_SIZE - 1) & PAGE_MASK; - seg->src = encl->src + seg->offset; - seg->measure = true; - j++; }
@@ -322,5 +350,7 @@ bool encl_build(struct encl *encl) return false; }
+ encl->tcs = (struct sgx_tcs *)((unsigned long)encl->tcs + encl->encl_base); + return true; } diff --git a/tools/testing/selftests/sgx/main.c b/tools/testing/selftests/sgx/main.c index dd74fa42302e..b206548803b4 100644 --- a/tools/testing/selftests/sgx/main.c +++ b/tools/testing/selftests/sgx/main.c @@ -109,25 +109,6 @@ static Elf64_Sym *vdso_symtab_get(struct vdso_symtab *symtab, const char *name) return NULL; }
-/* - * Return the offset in the enclave where the data segment can be found. - * The first RW segment loaded is the TCS, skip that to get info on the - * data segment. - */ -static off_t encl_get_data_offset(struct encl *encl) -{ - int i; - - for (i = 1; i < encl->nr_segments; i++) { - struct encl_segment *seg = &encl->segment_tbl[i]; - - if (seg->prot == (PROT_READ | PROT_WRITE)) - return seg->offset; - } - - return -1; -} - FIXTURE(enclave) { struct encl encl; struct sgx_enclave_run run; @@ -248,7 +229,7 @@ TEST_F(enclave, unclobbered_vdso) ASSERT_TRUE(setup_test_encl(ENCL_HEAP_SIZE_DEFAULT, &self->encl, _metadata));
memset(&self->run, 0, sizeof(self->run)); - self->run.tcs = self->encl.encl_base; + self->run.tcs = (__u64)self->encl.tcs;
put_op.header.type = ENCL_OP_PUT_TO_BUFFER; put_op.value = MAGIC; @@ -321,7 +302,7 @@ TEST_F(enclave, unclobbered_vdso_oversubscribed) ASSERT_TRUE(setup_test_encl(total_mem, &self->encl, _metadata));
memset(&self->run, 0, sizeof(self->run)); - self->run.tcs = self->encl.encl_base; + self->run.tcs = (__u64)self->encl.tcs;
put_op.header.type = ENCL_OP_PUT_TO_BUFFER; put_op.value = MAGIC; @@ -350,7 +331,7 @@ TEST_F(enclave, clobbered_vdso) ASSERT_TRUE(setup_test_encl(ENCL_HEAP_SIZE_DEFAULT, &self->encl, _metadata));
memset(&self->run, 0, sizeof(self->run)); - self->run.tcs = self->encl.encl_base; + self->run.tcs = (__u64)self->encl.tcs;
put_op.header.type = ENCL_OP_PUT_TO_BUFFER; put_op.value = MAGIC; @@ -386,7 +367,7 @@ TEST_F(enclave, clobbered_vdso_and_user_function) ASSERT_TRUE(setup_test_encl(ENCL_HEAP_SIZE_DEFAULT, &self->encl, _metadata));
memset(&self->run, 0, sizeof(self->run)); - self->run.tcs = self->encl.encl_base; + self->run.tcs = (__u64)self->encl.tcs;
self->run.user_handler = (__u64)test_handler; self->run.user_data = 0xdeadbeef; @@ -419,7 +400,7 @@ TEST_F(enclave, tcs_entry) ASSERT_TRUE(setup_test_encl(ENCL_HEAP_SIZE_DEFAULT, &self->encl, _metadata));
memset(&self->run, 0, sizeof(self->run)); - self->run.tcs = self->encl.encl_base; + self->run.tcs = (__u64)self->encl.tcs;
op.type = ENCL_OP_NOP;
@@ -431,7 +412,7 @@ TEST_F(enclave, tcs_entry) EXPECT_EQ(self->run.exception_addr, 0);
/* Move to the next TCS. */ - self->run.tcs = self->encl.encl_base + PAGE_SIZE; + self->run.tcs = (__u64)self->encl.tcs + PAGE_SIZE;
EXPECT_EQ(ENCL_CALL(&op, &self->run, true), 0);
@@ -464,11 +445,9 @@ TEST_F(enclave, pte_permissions) ASSERT_TRUE(setup_test_encl(ENCL_HEAP_SIZE_DEFAULT, &self->encl, _metadata));
memset(&self->run, 0, sizeof(self->run)); - self->run.tcs = self->encl.encl_base; + self->run.tcs = (__u64)self->encl.tcs;
- data_start = self->encl.encl_base + - encl_get_data_offset(&self->encl) + - PAGE_SIZE; + data_start = self->encl.encl_base + self->encl.data_offset + PAGE_SIZE;
/* * Sanity check to ensure it is possible to write to page that will diff --git a/tools/testing/selftests/sgx/main.h b/tools/testing/selftests/sgx/main.h index b45c52ec7ab3..bccb263be8d9 100644 --- a/tools/testing/selftests/sgx/main.h +++ b/tools/testing/selftests/sgx/main.h @@ -29,6 +29,8 @@ struct encl { struct encl_segment *segment_tbl; struct sgx_secs secs; struct sgx_sigstruct sigstruct; + struct sgx_tcs *tcs; + unsigned long data_offset; };
extern unsigned char sign_key[]; diff --git a/tools/testing/selftests/sgx/test_encl.lds b/tools/testing/selftests/sgx/test_encl.lds index a1ec64f7d91f..d76df884d8a4 100644 --- a/tools/testing/selftests/sgx/test_encl.lds +++ b/tools/testing/selftests/sgx/test_encl.lds @@ -2,17 +2,15 @@ OUTPUT_FORMAT(elf64-x86-64)
PHDRS { - tcs PT_LOAD; text PT_LOAD; data PT_LOAD; + tcs PT_LOAD; + note PT_NOTE; }
SECTIONS { . = 0; - .tcs : { - *(.tcs*) - } : tcs
. = ALIGN(4096); .text : { @@ -24,11 +22,20 @@ SECTIONS
.data : { *(.data*) + . = ALIGN(4096); } : data
+ .tcs : { + *(.tcs*) + } : tcs + + .note : { + *(.note.tcs*) + } : note + /DISCARD/ : { *(.comment*) - *(.note*) + *(.note.gnu.*) *(.debug*) *(.eh_frame*) } diff --git a/tools/testing/selftests/sgx/test_encl_bootstrap.S b/tools/testing/selftests/sgx/test_encl_bootstrap.S index 1c1b5c6c4ffe..912b21537532 100644 --- a/tools/testing/selftests/sgx/test_encl_bootstrap.S +++ b/tools/testing/selftests/sgx/test_encl_bootstrap.S @@ -10,6 +10,7 @@ .section ".tcs", "aw" .balign 4096
+encl_tcs: .fill 1, 8, 0 # STATE (set by CPU) .fill 1, 8, 0 # FLAGS .quad encl_ssa_tcs1 # OSSA @@ -90,3 +91,9 @@ encl_stack: .balign 4096 # Stack of TCS #2 .space 4096 + + .section ".note.tcs", "", @progbits + .long 4 + .long encl_tcs + .long 0 + .string "TCS"
Hi Jarkko,
On 3/22/2022 12:43 AM, Jarkko Sakkinen wrote:
Simplify the test_encl_bootstrap.S flow by using rip-relative addressing. Compiler does the right thing here, and this removes dependency on where TCS entries need to be located in the binary, i.e. allows the binary layout changed freely in the future.
Cc: Reinette Chatre reinette.chatre@intel.com Cc: Dave Hansen dave.hansen@linux.intel.com Signed-off-by: Jarkko Sakkinen jarkko@kernel.org
tools/testing/selftests/sgx/test_encl_bootstrap.S | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/tools/testing/selftests/sgx/test_encl_bootstrap.S b/tools/testing/selftests/sgx/test_encl_bootstrap.S index 82fb0dfcbd23..1c1b5c6c4ffe 100644 --- a/tools/testing/selftests/sgx/test_encl_bootstrap.S +++ b/tools/testing/selftests/sgx/test_encl_bootstrap.S @@ -40,11 +40,7 @@ .text encl_entry:
- # RBX contains the base address for TCS, which is the first address
- # inside the enclave for TCS #1 and one page into the enclave for
- # TCS #2. By adding the value of encl_stack to it, we get
- # the absolute address for the stack.
- lea (encl_stack)(%rbx), %rax
- lea (encl_stack)(%rip), %rax xchg %rsp, %rax push %rax
The goal of the above snippet is to set RSP to ensure that each thread has its own stack.
Since EENTER computes RIP as EnclaveBase + TCS.OENTRY, by using offset from RIP this would result in all TCS with OENTRY of encl_entry to use the same stack, no?
Could you please consider the following as an alternative: https://lore.kernel.org/lkml/65c137c875bd4da675eaba35316ff43d7cfd52f8.164427...
The idea in that patch is that a new TCS would always need to be accompanied by a dedicated stack so, at least for testing purposes, the TCS and stack can be dynamically allocated together with the TCS page following its stack. This seems much simpler to me and also makes the following patch unnecessary.
Reinette
On Mon, Mar 28, 2022 at 02:49:04PM -0700, Reinette Chatre wrote:
Hi Jarkko,
On 3/22/2022 12:43 AM, Jarkko Sakkinen wrote:
Simplify the test_encl_bootstrap.S flow by using rip-relative addressing. Compiler does the right thing here, and this removes dependency on where TCS entries need to be located in the binary, i.e. allows the binary layout changed freely in the future.
Cc: Reinette Chatre reinette.chatre@intel.com Cc: Dave Hansen dave.hansen@linux.intel.com Signed-off-by: Jarkko Sakkinen jarkko@kernel.org
tools/testing/selftests/sgx/test_encl_bootstrap.S | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/tools/testing/selftests/sgx/test_encl_bootstrap.S b/tools/testing/selftests/sgx/test_encl_bootstrap.S index 82fb0dfcbd23..1c1b5c6c4ffe 100644 --- a/tools/testing/selftests/sgx/test_encl_bootstrap.S +++ b/tools/testing/selftests/sgx/test_encl_bootstrap.S @@ -40,11 +40,7 @@ .text encl_entry:
- # RBX contains the base address for TCS, which is the first address
- # inside the enclave for TCS #1 and one page into the enclave for
- # TCS #2. By adding the value of encl_stack to it, we get
- # the absolute address for the stack.
- lea (encl_stack)(%rbx), %rax
- lea (encl_stack)(%rip), %rax xchg %rsp, %rax push %rax
The goal of the above snippet is to set RSP to ensure that each thread has its own stack.
Since EENTER computes RIP as EnclaveBase + TCS.OENTRY, by using offset from RIP this would result in all TCS with OENTRY of encl_entry to use the same stack, no?
Could you please consider the following as an alternative: https://lore.kernel.org/lkml/65c137c875bd4da675eaba35316ff43d7cfd52f8.164427...
The idea in that patch is that a new TCS would always need to be accompanied by a dedicated stack so, at least for testing purposes, the TCS and stack can be dynamically allocated together with the TCS page following its stack. This seems much simpler to me and also makes the following patch unnecessary.
There's no better alternative than use rip. Compiler will fix it up.
So, no, I won't consider that. This a dead obvious change.
BR, Jarkko
On Wed, Mar 30, 2022 at 05:54:18PM +0300, Jarkko Sakkinen wrote:
On Mon, Mar 28, 2022 at 02:49:04PM -0700, Reinette Chatre wrote:
Hi Jarkko,
On 3/22/2022 12:43 AM, Jarkko Sakkinen wrote:
Simplify the test_encl_bootstrap.S flow by using rip-relative addressing. Compiler does the right thing here, and this removes dependency on where TCS entries need to be located in the binary, i.e. allows the binary layout changed freely in the future.
Cc: Reinette Chatre reinette.chatre@intel.com Cc: Dave Hansen dave.hansen@linux.intel.com Signed-off-by: Jarkko Sakkinen jarkko@kernel.org
tools/testing/selftests/sgx/test_encl_bootstrap.S | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/tools/testing/selftests/sgx/test_encl_bootstrap.S b/tools/testing/selftests/sgx/test_encl_bootstrap.S index 82fb0dfcbd23..1c1b5c6c4ffe 100644 --- a/tools/testing/selftests/sgx/test_encl_bootstrap.S +++ b/tools/testing/selftests/sgx/test_encl_bootstrap.S @@ -40,11 +40,7 @@ .text encl_entry:
- # RBX contains the base address for TCS, which is the first address
- # inside the enclave for TCS #1 and one page into the enclave for
- # TCS #2. By adding the value of encl_stack to it, we get
- # the absolute address for the stack.
- lea (encl_stack)(%rbx), %rax
- lea (encl_stack)(%rip), %rax xchg %rsp, %rax push %rax
The goal of the above snippet is to set RSP to ensure that each thread has its own stack.
Since EENTER computes RIP as EnclaveBase + TCS.OENTRY, by using offset from RIP this would result in all TCS with OENTRY of encl_entry to use the same stack, no?
Could you please consider the following as an alternative: https://lore.kernel.org/lkml/65c137c875bd4da675eaba35316ff43d7cfd52f8.164427...
The idea in that patch is that a new TCS would always need to be accompanied by a dedicated stack so, at least for testing purposes, the TCS and stack can be dynamically allocated together with the TCS page following its stack. This seems much simpler to me and also makes the following patch unnecessary.
There's no better alternative than use rip. Compiler will fix it up.
So, no, I won't consider that. This a dead obvious change.
How you organize TCS and stack is completely unrelated topic.
BR, Jarkko
Hi Jarkko,
On 3/30/2022 7:54 AM, Jarkko Sakkinen wrote:
On Mon, Mar 28, 2022 at 02:49:04PM -0700, Reinette Chatre wrote:
Hi Jarkko,
On 3/22/2022 12:43 AM, Jarkko Sakkinen wrote:
Simplify the test_encl_bootstrap.S flow by using rip-relative addressing. Compiler does the right thing here, and this removes dependency on where TCS entries need to be located in the binary, i.e. allows the binary layout changed freely in the future.
Cc: Reinette Chatre reinette.chatre@intel.com Cc: Dave Hansen dave.hansen@linux.intel.com Signed-off-by: Jarkko Sakkinen jarkko@kernel.org
tools/testing/selftests/sgx/test_encl_bootstrap.S | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/tools/testing/selftests/sgx/test_encl_bootstrap.S b/tools/testing/selftests/sgx/test_encl_bootstrap.S index 82fb0dfcbd23..1c1b5c6c4ffe 100644 --- a/tools/testing/selftests/sgx/test_encl_bootstrap.S +++ b/tools/testing/selftests/sgx/test_encl_bootstrap.S @@ -40,11 +40,7 @@ .text encl_entry:
- # RBX contains the base address for TCS, which is the first address
- # inside the enclave for TCS #1 and one page into the enclave for
- # TCS #2. By adding the value of encl_stack to it, we get
- # the absolute address for the stack.
- lea (encl_stack)(%rbx), %rax
- lea (encl_stack)(%rip), %rax xchg %rsp, %rax push %rax
The goal of the above snippet is to set RSP to ensure that each thread has its own stack.
Since EENTER computes RIP as EnclaveBase + TCS.OENTRY, by using offset from RIP this would result in all TCS with OENTRY of encl_entry to use the same stack, no?
Could you please consider the following as an alternative: https://lore.kernel.org/lkml/65c137c875bd4da675eaba35316ff43d7cfd52f8.164427...
The idea in that patch is that a new TCS would always need to be accompanied by a dedicated stack so, at least for testing purposes, the TCS and stack can be dynamically allocated together with the TCS page following its stack. This seems much simpler to me and also makes the following patch unnecessary.
There's no better alternative than use rip. Compiler will fix it up.
Could you please elaborate how the compiler will fix it up?
So, no, I won't consider that. This a dead obvious change.
It is not obvious to me so I attempted to make it obvious by writing a test program that prints RSP from the two different threads.
test_encl_bootstrap.S gives each thread, TCS #1 and TCS #2, a page of stack. Before your patch, with the test below printing RSP, this is clear ... the stack used by the two threads are one page apart: # RUN enclave.tcs_entry ... rsp TCS #1 = 0X7FD997D97F68 rsp TCS #2 = 0X7FD997D98F68 # OK enclave.tcs_entry
After applying this patch both threads use the same stack memory: # RUN enclave.tcs_entry ... rsp TCS #1 = 0X7FCF778B7F68 rsp TCS #2 = 0X7FCF778B7F68 # OK enclave.tcs_entry
Here is the test I used:
diff --git a/tools/testing/selftests/sgx/defines.h b/tools/testing/selftests/sgx/defines.h index d8587c971941..08b2765dc2f4 100644 --- a/tools/testing/selftests/sgx/defines.h +++ b/tools/testing/selftests/sgx/defines.h @@ -27,6 +27,7 @@ enum encl_op_type { ENCL_OP_EACCEPT, ENCL_OP_EMODPE, ENCL_OP_INIT_TCS_PAGE, + ENCL_OP_GET_RSP, ENCL_OP_MAX, };
@@ -76,4 +77,10 @@ struct encl_op_init_tcs_page { uint64_t entry; };
+struct encl_op_rsp { + struct encl_op_header header; + uint64_t ret; +}; + + #endif /* DEFINES_H */ diff --git a/tools/testing/selftests/sgx/main.c b/tools/testing/selftests/sgx/main.c index a7543e5561a9..2380944dce71 100644 --- a/tools/testing/selftests/sgx/main.c +++ b/tools/testing/selftests/sgx/main.c @@ -570,12 +573,14 @@ TEST_F(enclave, clobbered_vdso_and_user_function) /* * Sanity check that it is possible to enter either of the two hardcoded TCS */ TEST_F(enclave, tcs_entry) { struct encl_op_header op; + struct encl_op_rsp rsp_op;
ASSERT_TRUE(setup_test_encl(ENCL_HEAP_SIZE_DEFAULT, &self->encl, _metadata));
@@ -591,6 +596,17 @@ TEST_F(enclave, tcs_entry) EXPECT_EQ(self->run.exception_error_code, 0); EXPECT_EQ(self->run.exception_addr, 0);
+ rsp_op.ret = 0; + rsp_op.header.type = ENCL_OP_GET_RSP; + + EXPECT_EQ(ENCL_CALL(&rsp_op, &self->run, true), 0); + + EXPECT_EEXIT(&self->run); + EXPECT_EQ(self->run.exception_vector, 0); + EXPECT_EQ(self->run.exception_error_code, 0); + EXPECT_EQ(self->run.exception_addr, 0); + printf("rsp TCS #1 = 0X%lX \n", rsp_op.ret); + /* Move to the next TCS. */ self->run.tcs = self->encl.encl_base + PAGE_SIZE;
@@ -600,6 +616,17 @@ TEST_F(enclave, tcs_entry) EXPECT_EQ(self->run.exception_vector, 0); EXPECT_EQ(self->run.exception_error_code, 0); EXPECT_EQ(self->run.exception_addr, 0); + rsp_op.ret = 0; + rsp_op.header.type = ENCL_OP_GET_RSP; + + EXPECT_EQ(ENCL_CALL(&rsp_op, &self->run, true), 0); + + EXPECT_EEXIT(&self->run); + EXPECT_EQ(self->run.exception_vector, 0); + EXPECT_EQ(self->run.exception_error_code, 0); + EXPECT_EQ(self->run.exception_addr, 0); + printf("rsp TCS #2 = 0X%lX \n", rsp_op.ret); + }
/* diff --git a/tools/testing/selftests/sgx/test_encl.c b/tools/testing/selftests/sgx/test_encl.c index c0d6397295e3..b2a94a6d754e 100644 --- a/tools/testing/selftests/sgx/test_encl.c +++ b/tools/testing/selftests/sgx/test_encl.c @@ -119,6 +119,17 @@ static void do_encl_op_nop(void *_op)
}
+static void do_get_rsp(void *_op) +{ + struct encl_op_rsp *op = _op; + uint64_t rsp; + + asm volatile("mov %%rsp, %0 \n": "=r"(rsp) ::); + + op->ret = rsp; + +} + void encl_body(void *rdi, void *rsi) { const void (*encl_op_array[ENCL_OP_MAX])(void *) = { @@ -130,6 +141,7 @@ void encl_body(void *rdi, void *rsi) do_encl_eaccept, do_encl_emodpe, do_encl_init_tcs_page, + do_get_rsp, };
struct encl_op_header *op = (struct encl_op_header *)rdi;
linux-kselftest-mirror@lists.linaro.org
-
Jarkko Sakkinen -
Reinette Chatre