pic32 port of newlib

.gitattributes

@@ -836,9 +836,11 @@ newlib/libgloss/pic32mx/Makefile.in -text
 newlib/libgloss/pic32mx/aclocal.m4 -text
 newlib/libgloss/pic32mx/configure -text
 newlib/libgloss/pic32mx/configure.in -text
+newlib/libgloss/pic32mx/exceptions.c -text
+newlib/libgloss/pic32mx/read.c -text
 newlib/libgloss/pic32mx/regs.S -text
-newlib/libgloss/pic32mx/syscalls.c -text
-newlib/libgloss/pic32mx/test.c -text
+newlib/libgloss/pic32mx/sbrk.c -text
+newlib/libgloss/pic32mx/write.c -text
 newlib/libgloss/print.c -text
 newlib/libgloss/putnum.c -text
 newlib/libgloss/read.c -text

newlib/libgloss/pic32mx/Makefile.in

@@ -65,9 +65,14 @@ OBJCOPY = `if [ -f ${objroot}/../binutils/objcopy ] ; \
 	else t='$(program_transform_name)'; echo objcopy | sed -e $$t ; fi`
 
 CRT0 = @crt0@
-GENOBJS = syscalls.o fstat.o getpid.o isatty.o kill.o \
-	lseek.o print.o putnum.o stat.o unlink.o
-GENOBJS2 = open.o close.o read.o write.o
+
+LIBPIC32_BSP = libpic32.a
+LIBPIC32_OBJS = sbrk.o close.o fstat.o getpid.o isatty.o kill.o \
+	lseek.o open.o print.o stat.o unlink.o write.o read.o
+
+
+LIBE_BSP = libe.a
+LIBE_OBJS = exceptions.o
 
 CFLAGS = -g 
 
@@ -75,7 +80,7 @@ GCC_LDFLAGS = `if [ -d ${objroot}/../gcc ] ; \
 	then echo -L${objroot}/../gcc ; fi`
 
 SCRIPTS = @script_list@
-BSP = @bsp_list@
+BSP = @bsp_list@ $(LIBPIC32_BSP) $(LIBE_BSP)
 
 PART_SPECIFIC_DEFINES = @part_specific_defines@
 
@@ -87,7 +92,7 @@ PART_SPECIFIC_DEFINES = @part_specific_defines@
 # it to link is a good test, so we ignore all the errors for now.
 #
 
-all: ${CRT0} test.o ${BSP}
+all: ${CRT0} $(LIBPIC32_BSP) ${BSP}
 
 #
 # here's where we build the board support packages for each target
@@ -119,12 +124,49 @@ info:
 install-info:
 clean-info:
 
-test.o:	${srcdir}/test.c
-
 # these are for the BSPs
 crt0.o: ${srcdir}/crt0.S
 
-syscalls.o: ${srcdir}/syscalls.c
+sbrk.o: ${srcdir}/sbrk.c
+
+syscalls.o: $(srcdir)/syscalls.c
+
+close.o: $(srcdir)/../close.c
+
+fstat.o: $(srcdir)/../fstat.c
+
+getpid.o: $(srcdir)/../getpid.c
+
+isatty.o: $(srcdir)/../isatty.c
+
+kill.o: $(srcdir)/../kill.c
+
+lseek.o: $(srcdir)/../lseek.c
+
+open.o: $(srcdir)/../open.c
+
+print.o: $(srcdir)/../print.c
+
+putnum.o: $(srcdir)/../putnum.c
+
+stat.o: $(srcdir)/../stat.c
+
+unlink.o: $(srcdir)/../unlink.c
+
+write.o: $(srcdir)/write.c
+
+read.o: $(srcdir)/read.c
+
+
+exceptions.o: ${srcdir}/exceptions.c
+
+$(LIBPIC32_BSP): $(LIBPIC32_OBJS)
+	${AR} ${ARFLAGS} $@ $^
+	${RANLIB} $@
+	
+$(LIBE_BSP): $(LIBE_OBJS)
+	${AR} ${ARFLAGS} $@ $^
+	${RANLIB} $@
 
 # target specific makefile fragment comes in here.
 @target_makefile_frag@

newlib/libgloss/pic32mx/exceptions.c

@@ -0,0 +1,53 @@
+
+#include <stdlib.h>
+
+extern void _on_reset() __attribute__((weak));
+
+extern void _nmi_handler() __attribute__((weak)) __attribute__((nomips16));
+
+extern void _on_bootstrap() __attribute__((weak)); 
+
+extern void _bootstrap_exception_handler() __attribute__((weak)) __attribute__((nomips16));
+
+extern void _general_exception_handler(unsigned cause, unsigned status) __attribute__((weak)); /* should have nomips16 here as well */
+
+void _on_reset() {
+  /* nothing */
+  __asm__ __volatile__ ("%(nop%)" : :);
+}
+
+void _nmi_handler() {
+
+}
+
+void _on_bootstrap() {
+  /* nothing */
+  __asm__ __volatile__ ("%(nop%)" : :);
+}
+
+void _bootstrap_exception_handler() {
+  while (1) {
+  __asm__ __volatile__ ("%(nop%)" : :);
+  }
+};
+
+void _general_exception_context() {
+/* The provided implementation
+ * of this function saves context, calls an application handler function, restores context
+ * and performs a return from exception instruction. The context saved is the hi and lo
+ * registers and all general purpose registers except s0-s8, which are defined to be
+ * preserved by all called functions and so are not necessary to actively save again here.
+ * The values of the Cause and Status registers are passed to the application handler
+ * function (_general_exception_handler())
+ */
+ 
+ /* XXX TODO: write this function */
+ _general_exception_handler(0,0);
+};
+
+
+void _general_exception_handler(unsigned cause, unsigned status) {
+  while (1) {
+  __asm__ __volatile__ ("%(nop%)" : :);
+  }
+};

newlib/libgloss/pic32mx/read.c

@@ -0,0 +1,20 @@
+/*
+ * Stub version of read.
+ */
+
+#include <_ansi.h>
+#include <_syslist.h>
+#include <errno.h>
+#undef errno
+extern int errno;
+
+int
+_DEFUN (read, (file, ptr, len),
+        int   file  _AND
+        char *ptr   _AND
+        int   len)
+{
+  errno = ENOSYS;
+  return -1;
+}
+

newlib/libgloss/pic32mx/test.c

@@ -1,13 +0,0 @@
-main()
-{
-  outbyte ('&');
-  outbyte ('@');
-  outbyte ('$');
-  outbyte ('%');
-
-  /* whew, we made it */
-  
-  print ("\r\nDone...");
-
-  return;
-}

newlib/libgloss/pic32mx/write.c

@@ -0,0 +1,21 @@
+/*
+ * Stub version of write.
+ */
+
+#include <_ansi.h>
+#include <_syslist.h>
+#include <errno.h>
+#undef errno
+extern int errno;
+
+int
+_DEFUN (write, (file, ptr, len),
+        int   file  _AND
+        char *ptr   _AND
+        int   len)
+{
+  errno = ENOSYS;
+  return -1;
+}
+
+

newlib/newlib/configure.host

@@ -678,6 +678,9 @@ case "${host}" in
   mn10?00-*-*)
 	syscall_dir=syscalls
 	;;
+  pic32mx-*)
+        newlib_cflags="${newlib_cflags} -DSMALL_MEMORY -DMISSING_SYSCALL_NAMES"
+	;;
   powerpc*-*-eabialtivec*)
 	default_newlib_io_long_long="yes"
 	newlib_cflags="${newlib_cflags} -DMISSING_SYSCALL_NAMES"

newlib/newlib/libc/include/sys/config.h

@@ -95,8 +95,17 @@
 #endif
 
 #if defined(__mips__) && !defined(__rtems__)
+#if defined(__PIC32MX__) && defined(__section__)
+/* Microchip attribs.h defines a __section__ which interfers with our IMPURE define, so this should work around it for now */
+#define __ATTRIBUTE_IMPURE_PTR__ __section__(".sdata")
+#else
 #define __ATTRIBUTE_IMPURE_PTR__ __attribute__((__section__(".sdata")))
 #endif
+#endif
+
+#if defined(__PIC32MX__)
+#define _REENT_SMALL
+#endif
 
 #ifdef __xstormy16__
 #define __SMALL_BITFIELDS