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Add macro to exclude sgx wasi/pthread ocalls if not needed (#384)

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Xu Jun
2020-09-15 15:49:09 +08:00
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parent 2499e1ec4b
commit 547298d4e7
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15
doc/linux_sgx.md
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@ -39,12 +39,25 @@ or:
iwasm [-options] aot_file [args...]
```
### Minimal build
The libc-WASI and lib-pthread features require a lot of ocalls, if you don't need so much ocalls in your application, you can use the `minimal` version
``` Bash
# replace the build files with minimal version
cd product-mini/platforms/linux-sgx/
cp CMakeLists_minimal.txt CMakeLists.txt
cp enclave-sample/Makefile_minimal enclave-sample/Makefile
cp enclave-sample/Enclave/Enclave_minimal.edl enclave-sample/Enclave/Enclave.edl
# follow the building process above
```
Port WAMR vmcore for Linux SGX
------------------------------
The enclave-sample creates a sample to embed wamr vmlib of Enclave part and App part to an SGX application. To port WAMR vmcore lib to SGX application, there are some steps to do:
**Step 1: Add "sgx_wamr.edl" and "sgx_pthread.edl" into EDL file, e.g. Enclave.edl:**
> This step is not required in minimal version
```bash
from "sgx_pthread.edl" import *;
@ -68,6 +81,7 @@ The sgx_wamr.edl is under ${WAMR_ROOT}/core/shared/platform/linux-sgx, so please
```
**Step 2: Link libvmlib.a to Enclave part and link libvmlib_untrusted.a to App part:**
> libvmlib_untrusted.a is not required in minimal version
```makefile
Enclave_Link_Flags := ... libvmlib.a ...
@ -78,6 +92,7 @@ App_Link_Flags := ... libvmlib_untrusted.a ...
```
**And link SGX pthread lib to Enclave part:**
> SGX pthread lib is not required in minimal version
```makefile
Enclave_Link_Flags := ... -lsgx_pthread ...