From 85bdc136388b07d039610df97362f07fe6529e2c Mon Sep 17 00:00:00 2001
From: Daniil Baturin <daniil@baturin.org>
Date: Fri, 1 Apr 2016 16:45:09 +0600
Subject: Crude support for building on non-x86 architectures.

Right now the CPUID procedure is made to return zeroes on non-x86 platforms through
conditional compilation.
A cleaner solution would be to use separate procedures and specify implementation
through gprbuild directives.
---
 Makefile                 |  3 +++
 hvinfo.def               |  1 +
 hvinfo.gpr               |  5 +++++
 mkconfig.sh              | 10 ++++++++++
 src/hypervisor_check.adb |  4 ++++
 5 files changed, 23 insertions(+)
 create mode 100644 hvinfo.def

diff --git a/Makefile b/Makefile
index 9893b1a..783d4f3 100644
--- a/Makefile
+++ b/Makefile
@@ -20,6 +20,8 @@ BINDIR = bin
 
 BUILD_DIR = build
 
+CONFIG = config.def
+
 DESTDIR = ""
 
 GPRBUILD = gprbuild
@@ -51,6 +53,7 @@ clean:
 	  $(GPRCLEAN); \
 	  rm -rf $(BUILD_DIR);\
 	fi
+	rm -f $(CONFIG)
 
 install:
 	$(INSTALL) -d $(DESTDIR)/$(PREFIX)/$(BINDIR)
diff --git a/hvinfo.def b/hvinfo.def
new file mode 100644
index 0000000..1b562e8
--- /dev/null
+++ b/hvinfo.def
@@ -0,0 +1 @@
+* "config.def" -u
diff --git a/hvinfo.gpr b/hvinfo.gpr
index 00c0463..227c236 100644
--- a/hvinfo.gpr
+++ b/hvinfo.gpr
@@ -5,5 +5,10 @@ project hvinfo is
    for Object_Dir use  "build";
    for Main use ("hvinfo.adb");
 
+   package Compiler is
+      for Switches ("Ada") use
+        ("-gnatep=" & hvinfo'Project_Dir & "hvinfo.def", "-I" & hvinfo'Project_Dir);
+   end Compiler;
+
 end hvinfo;
 
diff --git a/mkconfig.sh b/mkconfig.sh
index d8d0eaf..54a91c2 100755
--- a/mkconfig.sh
+++ b/mkconfig.sh
@@ -21,6 +21,8 @@ HVINFO_FREEBSD=False
 
 VERSION=$(cat VERSION)
 
+CONFIG=config.def
+
 OS=$(uname)
 case $OS in
     Linux)
@@ -34,6 +36,14 @@ case $OS in
         exit 1
 esac
 
+# Create the gnatprep defs file
+# Determine the arch
+rm -f $CONFIG
+ARCH=$(uname -m)
+if [ $(expr $ARCH : 'i*86') -o $(expr $ARCH : 'amd64') -o $(expr $ARCH : 'x86_64') ]; then
+    echo "X86 := True" >> $CONFIG
+fi
+
 $GNATPREP -D LINUX=$HVINFO_LINUX \
          -D FREEBSD=$HVINFO_FREEBSD \
          -D VERSION=\"$VERSION\" \
diff --git a/src/hypervisor_check.adb b/src/hypervisor_check.adb
index b6c8719..4d87cb0 100644
--- a/src/hypervisor_check.adb
+++ b/src/hypervisor_check.adb
@@ -22,6 +22,7 @@ package body Hypervisor_Check is
     function CPUID (Arg : Unsigned_32) return CPUID_Registers is
         eax, ebx, ecx, edx : Unsigned_32;
     begin
+        #if X86 then
 	Asm("cpuid",
             Outputs => (Unsigned_32'Asm_Output ("=a", eax),
                         Unsigned_32'Asm_Output ("=b", ebx),
@@ -29,6 +30,9 @@ package body Hypervisor_Check is
                         Unsigned_32'Asm_Output ("=d", edx)),
             Inputs  => Unsigned_32'Asm_Input ("a", Arg));
         return (eax, ebx, ecx, edx);
+        #else
+        return (0, 0, 0, 0);
+        #end if;
     end CPUID;
 
     -- Convert an unsigned 32-bit integer to a string of 4 characters
-- 
cgit v1.2.3