Make qemu-palcode build environment standalone. NFC.

Don't include system headers.  Instead, provide standalone definitions
and declarations of types needed and functions used by the PALcode that
are compatible with the standard Alpha / GCC ABI.

Signed-off-by: Jason Thorpe <thorpej@me.com>
Message-Id: <20210603035317.6814-2-thorpej@me.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

5 files changed, 28 insertions, 12 deletions

diff --git a/init.c b/init.c
index b53bab6..429a9ad 100644
--- a/init.c
+++ b/init.c
@@ -18,8 +18,6 @@
    along with this program; see the file COPYING.  If not see
    <http://www.gnu.org/licenses/>.  */
 
-#include <string.h>
-#include <stddef.h>
 #include "hwrpb.h"
 #include "osf.h"
 #include "ioport.h"
diff --git a/memcpy.c b/memcpy.c
index b6bbb74..9e1e913 100644
--- a/memcpy.c
+++ b/memcpy.c
@@ -8,7 +8,7 @@
  * This is a reasonably optimized memcpy() routine.
  */
 
-#include <string.h>
+#include "protos.h"
 
 /*
  * Note that the C code is written to be optimized into good assembly. However,
diff --git a/memset.c b/memset.c
index e8481dc..f9b0a6d 100644
--- a/memset.c
+++ b/memset.c
@@ -19,7 +19,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 
-#include <string.h>
+#include "protos.h"
 
 void *memset(void *optr, int ival, unsigned long size)
 {
diff --git a/printf.c b/printf.c
index 469b82c..0e1e128 100644
--- a/printf.c
+++ b/printf.c
@@ -18,10 +18,8 @@
    along with this program; see the file COPYING.  If not see
    <http://www.gnu.org/licenses/>.  */
 
-#include <stdarg.h>
-#include <stdbool.h>
-#include <string.h>
 #include "console.h"
+#include "protos.h"
 
 static int print_buf_pad(char *buf, int buflen, char *p, int width, int pad)
 {
diff --git a/protos.h b/protos.h
index 3ed1381..0d90be8 100644
--- a/protos.h
+++ b/protos.h
@@ -21,11 +21,31 @@
 #ifndef PROTOS_H
 #define PROTOS_H 1
 
-#include <stdint.h>
-#include <stdbool.h>
-#include <stddef.h>
-#include <string.h>
-
+/* Stand-alone definitions for various types, compatible with
+   the Alpha Linux ABI and GCC.  This eliminates dependencies
+   on external headers.  */
+typedef unsigned char  uint8_t;
+typedef unsigned short uint16_t;
+typedef unsigned int   uint32_t;
+typedef unsigned long  uint64_t;
+typedef unsigned long  size_t;
+
+#define bool           _Bool
+#define true           1
+#define false          0
+
+#define offsetof(type, member) __builtin_offsetof(type, member)
+
+typedef __builtin_va_list va_list;
+#define va_start(ap, last)     __builtin_va_start((ap), (last))
+#define va_arg                 __builtin_va_arg
+#define va_end(ap)             __builtin_va_end(ap)
+
+#define NULL                   ((void *)0)
+
+extern void *memset(void *, int, size_t);
+extern void *memcpy(void *, const void *, size_t);
+extern size_t strlen(const char *);
 
 /*
  * Call_Pal functions.