Support ARM and Android

Conflicts:
	src/libcore/os.rs
	src/librustc/back/link.rs
	src/librustc/driver/driver.rs
	src/librustc/metadata/loader.rs
	src/librustc/middle/trans/base.rs

1 files changed, 36 insertions, 0 deletions

diff --git a/src/rt/arch/arm/context.cpp b/src/rt/arch/arm/context.cpp
new file mode 100644
index 00000000000..dbf06a532a8
--- /dev/null
+++ b/src/rt/arch/arm/context.cpp
@@ -0,0 +1,36 @@
+
+#include "context.h"
+#include "../../rust_globals.h"
+
+extern "C" void CDECL swap_registers(registers_t *oregs,
+                                     registers_t *regs)
+asm ("swap_registers");
+
+context::context()
+{
+    assert((void*)&regs == (void*)this);
+    memset(&regs, 0, sizeof(regs));
+}
+
+void context::swap(context &out)
+{
+    swap_registers(&out.regs, &regs);
+}
+
+void context::call(void *f, void *arg, void *stack)
+{
+  // Get the current context, which we will then modify to call the
+  // given function.
+  swap(*this);
+
+  // set up the stack
+  uint32_t *sp = ( uint32_t *)stack;
+  //sp = align_down(sp);
+  // The final return address. 0 indicates the bottom of the stack
+  *--sp = 0;
+
+  regs.data[0] = ( uint32_t )arg; // r0
+  regs.data[13] = ( uint32_t )sp; //#52 sp, r13
+  regs.data[14] = ( uint32_t )f;  //#60 pc, r15 --> lr,
+  // Last base pointer on the stack should be 0
+}