Wshift negative value (#79) + more compiler to travis (#77)

- Fixed clang warning `shifting a negative signed value is undefined`.
- use more compilers to test HermitCore in Travis

.travis.yml

@@ -1,34 +1,108 @@
 sudo: required
 dist: trusty
+language: c
+
 git:
   submodules: true
-language: c
+
-compiler:
+matrix:
-  - clang
+  include:
-  - gcc
+    - compiler:     gcc
+      addons:
+        apt:
+          sources:
+            - ubuntu-toolchain-r-test
+          packages:
+            - g++-4.9
+      env:
+          - COMPILERCXX=g++-4.9
+          - COMPILERC=gcc-4.9
+          - DEPLOY=true
+    - compiler:     gcc
+      addons:
+        apt:
+          sources:
+            - ubuntu-toolchain-r-test
+          packages:
+            - g++-5
+      env:
+          - COMPILERCXX=g++-5
+          - COMPILERC=gcc-5
+    - compiler:     gcc
+      addons:
+        apt:
+          sources:
+            - ubuntu-toolchain-r-test
+          packages:
+            - g++-6
+      env:
+          - COMPILERCXX=g++-6
+          - COMPILERC=gcc-6
+    - compiler:     clang
+      env:
+          - COMPILERC=clang
+          - COMPILERCXX=clang++
+          - CLANGV=3.8.1
+      addons:
+        apt:
+          sources:
+            - ubuntu-toolchain-r-test
+          packages:
+            - g++-6
+    - compiler:     clang
+      env:
+          - COMPILERC=clang
+          - COMPILERCXX=clang++
+          - CLANGV=3.9.1
+      addons:
+        apt:
+          sources:
+            - ubuntu-toolchain-r-test
+          packages:
+            - g++-6
+    - compiler:     clang
+      env:
+          - COMPILERC=clang
+          - COMPILERCXX=clang++
+          - CLANGV=4.0.1
+          - RUNCLANGTIDY=TRUE
+      addons:
+        apt:
+          sources:
+            - ubuntu-toolchain-r-test
+          packages:
+            - g++-6
+
+
 before_install:
   - echo "deb https://dl.bintray.com/rwth-os/hermitcore vivid main" | sudo tee -a /etc/apt/sources.list
   - travis_retry sudo apt-get -qq update
   - travis_retry sudo apt-get install -y curl wget qemu-system-x86 nasm texinfo libmpfr-dev libmpc-dev libgmp-dev libisl-dev flex bison packaging-dev rpm
   - travis_retry sudo apt-get install -y --force-yes binutils-hermit libhermit newlib-hermit pthread-embedded-hermit gcc-hermit
   - git submodule update --init lwip usr/libomp
+  # download clang
+  - mkdir $HOME/clang+llvm
+  - export PATH=$HOME/clang+llvm/bin:$PATH
+  - if [ -n "$CLANGV" ]; then wget http://llvm.org/releases/$CLANGV/clang+llvm-$CLANGV-x86_64-linux-gnu-debian8.tar.xz -O $HOME/clang+llvm.tar.xz; fi
+  - if [ -n "$CLANGV" ]; then tar xf $HOME/clang+llvm.tar.xz -C $HOME/clang+llvm --strip-components 1; fi
 
 script:
   - source cmake/local-cmake.sh
   - mkdir build
   - cd build
-  - cmake ..
+  - cmake -DCMAKE_EXPORT_COMPILE_COMMANDS=true ..
-  - make -j1 package
+  - CC=$COMPILERC CXX=$COMPILERCXX make -j1 package
   - cd $TRAVIS_BUILD_DIR
   - ./tests.sh
 
+
 notifications:
   slack: hermitcore:UtcfeEXkbpx3WyIDK2Wm2beS
 
 deploy:
-  on: 
+  on:
     branch: master
-    condition: "$CC = gcc"
+    condition: $DEPLOY = true
   provider: bintray
   file: .bintray_descriptor.json
   user:

arch/x86/include/asm/page.h

@@ -48,11 +48,11 @@
 #define PAGE_SIZE		( 1L << PAGE_BITS)
 /// Mask the page address without page map flags and XD flag
 #if 0
-#define PAGE_MASK		((~0L) << PAGE_BITS)
+#define PAGE_MASK		((~0UL) << PAGE_BITS)
-#define PAGE_2M_MASK		(~0L) << PAGE_2M_BITS)
+#define PAGE_2M_MASK		(~0UL) << PAGE_2M_BITS)
 #else
-#define PAGE_MASK		(((~0L) << PAGE_BITS) & ~PG_XD)
+#define PAGE_MASK		(((~0UL) << PAGE_BITS) & ~PG_XD)
-#define PAGE_2M_MASK		(((~0L) << PAGE_2M_BITS) & ~PG_XD)
+#define PAGE_2M_MASK		(((~0UL) << PAGE_2M_BITS) & ~PG_XD)
 #endif
 
 #if 0

arch/x86/loader/include/page.h

@@ -37,9 +37,9 @@
 #define PAGE_SIZE		( 1L << PAGE_BITS)
 /// Mask the page address without page map flags and XD flag
 #ifdef CONFIG_X86_32
-#define PAGE_MASK		(-1L << PAGE_BITS)
+#define PAGE_MASK		(~0UL << PAGE_BITS)
 #elif defined(CONFIG_X86_64)
-#define PAGE_MASK		((-1L << PAGE_BITS) & ~PG_XD)
+#define PAGE_MASK		((~0UL << PAGE_BITS) & ~PG_XD)
 #endif
 
 #ifdef CONFIG_X86_32

tools/uhyve.c

@@ -100,8 +100,8 @@
 #define PAGE_MASK		((~0L) << PAGE_BITS)
 #define PAGE_2M_MASK		(~0L) << PAGE_2M_BITS)
 #else
-#define PAGE_MASK			(((~0L) << PAGE_BITS) & ~PG_XD)
+#define PAGE_MASK			(((~0UL) << PAGE_BITS) & ~PG_XD)
-#define PAGE_2M_MASK	(((~0L) << PAGE_2M_BITS) & ~PG_XD)
+#define PAGE_2M_MASK	(((~0UL) << PAGE_2M_BITS) & ~PG_XD)
 #endif
 
 // Page is present