ARM Support

Signed-off-by: Peng Fan <van.freenix@gmail.com>

4 files changed, 163 insertions, 0 deletions

diff --git a/testcase/1.c b/testcase/1.c
new file mode 100644
index 0000000..e8a1241
--- /dev/null
+++ b/testcase/1.c
@@ -0,0 +1,106 @@
+int global;
+static char local;
+
+void hello(int arg)
+{
+  switch (arg) {
+    case 1:
+      printf("Inner-module call hello()\n");
+      break;
+    case 2:
+      printf("Inter-module call hello()\n");
+      break;
+    default:
+      return;
+  }
+}
+
+#if defined (__arm__)
+int rtems_arm(int arg)
+{
+  switch (arg) {
+    case 24:
+      printf("R_ARM_JUMP24: arg = 24\n");
+      break;
+  }
+  return 0;
+}
+
+int rtems_thumb(int arg)
+{
+  switch (arg) {
+    case 19:
+      printf("R_ARM_THM_JUMP19: arg = 19\n");
+      break;
+    case 24:
+      printf("R_ARM_THM_JUMP24: arg = 24\n");
+      break;
+  }
+  return 0;
+}
+#endif
+
+/* This is the init entry, Because init() use "blx", it is not needed
+ * to handle arm/thumb switch here
+ */
+int rtems(int argc, char **argv)
+{
+  local = 1;
+  printf("In rtems() local = %d\n", local); //inner-module data access
+  hello(1); //inner-module call
+  test(argc, argv);
+
+#if defined (__arm__)
+#ifdef THUMB_TEST
+  __asm__ volatile (
+      "push {r0}\r\n"
+      "push {lr}\r\n"
+      "mov r0, #19\r\n"
+      "cmp r0, #19\r\n"
+      "mov lr, pc\r\n"
+      "add lr, #7\r\n"
+      "beq rtems_thumb\r\n" /*THM_JUMP19*/
+      "nop\r\n"
+      "nop\r\n"
+      "nop\r\n"
+      "nop\r\n"
+      "pop {lr}\r\n"
+      "pop {r0}\r\n"
+      );
+  __asm__ volatile (
+      "push {r0}\r\n"
+      "push {lr}\r\n"
+      "mov r0, #24\r\n"
+      "mov lr, pc\r\n"
+      "add lr, #7\r\n"
+      "b.w rtems_thumb\r\n" /*THM_JUMP24*/
+      "nop\r\n"
+      "nop\r\n"
+      "nop\r\n"
+      "nop\r\n"
+      "pop {lr}\r\n"
+      "pop {r0}\r\n"
+      );
+#elif defined ARM_TEST
+  /*arm instruction test*/
+  __asm__ volatile (
+      "push {r0}\r\n"
+      "push {lr}\r\n"
+      "mov r0, #24\r\n"
+      "mov lr, pc\r\n"
+      "add lr, #4\r\n"
+      "b rtems_arm\r\n" /*JUMP24*/
+      "nop\r\n"
+      "nop\r\n"
+      "nop\r\n"
+      "nop\r\n"
+      "pop {lr}\r\n"
+      "pop {r0}\r\n"
+      );
+#endif
+
+#else
+  /* other archs */
+#endif
+  return 0;
+}
diff --git a/testcase/2.c b/testcase/2.c
new file mode 100644
index 0000000..a63c1c7
--- /dev/null
+++ b/testcase/2.c
@@ -0,0 +1,14 @@
+extern int global;
+extern void hello(int);
+
+int test(int argc, char **argv)
+{
+  global = 1; //inter-module data access
+  printf("In test() global = %d\n", global);
+  hello(2); //inter-module call
+}
+
+int my_main(int argc, char **argv)
+{
+  exit(0);
+}
diff --git a/testcase/Readme b/testcase/Readme
new file mode 100644
index 0000000..1312f60
--- /dev/null
+++ b/testcase/Readme
@@ -0,0 +1,11 @@
+====================
+arm:
+  Simulator:
+  qemu-system-arm -no-reboot -net none -nographic -M realview-pbx-a9 -m 256M -kernel build/arm-rtems4.11-realview_pbx_a9_qemu/rtld
+  add "-S -s" option and you can use gdbserver to debug rtld
+  use "halt" to exit qemu.
+
+  Configuration:
+  waf configure --rtems=/opt/rtems-4.11 --rtems-tools=/opt/rtems-4.11 --rtems-archs=arm  --rtems-bsps=arm/realview_pbx_a9_qemu
+
+  In the wscript, you can use different cflags to test.
diff --git a/testcase/wscript b/testcase/wscript
new file mode 100644
index 0000000..a518cb6
--- /dev/null
+++ b/testcase/wscript
@@ -0,0 +1,32 @@
+import re
+import rtems
+
+def build(bld):
+    arch = bld.get_env()['RTEMS_ARCH']
+
+    bld(target = 'x',
+        features = 'c cstlib',
+        includes = bld.includes,
+        defines = bld.defines,
+        source = ['1.c', '2.c'])
+
+#   Note: the bsp is compiled in thumb mode
+#   The follow cflags is to test arm/thumb reloc code.
+#   cflags = '-marm -fno-common -DARM_TEST',
+#   cflags = '-mthumb -fno-common -DTHUMB_TEST',
+#   cflags = '-marm -mcpu=arm1176jzf-s -fno-common -DARM_TEST',
+
+    if arch == 'arm':
+      bld(target = 'test.rap',
+      features = 'c rap',
+      xxxx = 'hello',
+
+      cflags = '-mthumb -fno-common -DTHUMB_TEST',
+
+      rtems_linkflags = ['--base', 'rtld.prelink',
+                         '--entry', 'my_main'],
+      source = ['1.c', '2.c'])
+
+    bld(target = '../test.rap',
+				source = ['test.rap'],
+				rule = 'cp ${SRC} ${TGT}')