embedded test, exit properly

.github/workflows/test_embedded.yml

+name: Test Embedded
+
+on: [push, pull_request]
+
+jobs:
+  unit:
+    name: Test Embedded
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout Code
+      uses: actions/checkout@v2
+    - name: Install Go
+      run: |
+        sudo apt-get update
+        sudo apt-get -y --no-install-recommends install golang python3 python3-pip
+    - name: Install Python deps
+      run: pip3 install -r risc/requirements.txt
+    - name: Build minigeth and run default block (cache)
+      run: ./run.sh
+    - name: Test in the embedded world
+      run: |
+        cd risc
+        ./build.sh && ./run.py 

.github/workflows/test.yml → .github/workflows/test_pc.yml

-name: Tests
+name: Test PC
 
 on: [push, pull_request]
 
 jobs:
   unit:
-    name: Tests
+    name: Test PC
     runs-on: ubuntu-latest
     steps:
     - name: Checkout Code

risc/requirements.txt

+unicorn==1.0.3
+pyelftools==0.27
+hexdump==3.3
+termcolor==1.1.0
\ No newline at end of file

risc/run.py

@@ -102,8 +102,9 @@ def hook_interrupt(uc, intno, user_data):
         uc.mem_write(buf, ret)
         uc.reg_write(UC_MIPS_REG_V0, len(ret))
     elif syscall_no == 4246:
-      print("EXIT")
-      return False
+      a0 = uc.reg_read(UC_MIPS_REG_A0)
+      print("exit(%d)" % a0)
+      os._exit(a0)
     elif syscall_no == 4090:
       a0 = uc.reg_read(UC_MIPS_REG_A0)
       a1 = uc.reg_read(UC_MIPS_REG_A1)

run.sh

 #!/bin/bash -e
 (cd minigeth/ && go build)
+mkdir -p /tmp/eth
+
 # 0 tx:         13284491
 # low tx:       13284469
 # delete issue: 13284053
-
 minigeth/go-ethereum 13284469