add libc building to agbcc.

1 files changed, 45 insertions, 0 deletions

diff --git a/libc/arm/libcfunc.c b/libc/arm/libcfunc.c
new file mode 100644
index 0000000..9825ccc
--- /dev/null
+++ b/libc/arm/libcfunc.c
@@ -0,0 +1,45 @@
+/* Support files for GNU libc.  Files in the C namespace go here.
+   Files in the system namespace (ie those that start with an underscore)
+   go in syscalls.c.
+   
+   Note: These functions are in a seperate file so that OS providers can
+   overrride the system call stubs (defined in syscalls.c) without having
+   to provide libc funcitons as well.  */
+#include "swi.h"
+
+#ifdef ARM_RDI_MONITOR
+
+static inline int
+do_AngelSWI (int reason, void * arg)
+{
+  int value;
+  asm volatile ("mov r0, %1; mov r1, %2; swi %a3; mov %0, r0"
+       : "=r" (value) /* Outputs */
+       : "r" (reason), "r" (arg), "i" (AngelSWI) /* Inputs */
+       : "r0", "r1", "lr"
+		/* Clobbers r0 and r1, and lr if in supervisor mode */);
+  return value;
+}
+#endif /* ARM_RDI_MONITOR */
+
+
+void
+abort (void)
+{
+#ifdef ARM_RDI_MONITOR
+  do_AngelSWI (AngelSWI_Reason_ReportException,
+	      (void *) ADP_Stopped_RunTimeError);
+#else
+ asm ("mov r0,#17\nswi %a0" :: "i" (SWI_Exit));
+#endif
+}
+
+isatty (int fd)
+{
+  return 1;
+}
+
+void
+alarm (void)
+{
+}