From 8d412689a97da681d87d60c8e43ac7e667c539cf Mon Sep 17 00:00:00 2001
From: Lukas Martini <hello@lutoma.org>
Date: Sat, 18 Nov 2023 23:47:39 +0100
Subject: [PATCH] land/newlib: Add _serial_printf debug function

---
 land/newlib/xelix/Makefile.am | 4 ++--
 land/newlib/xelix/crt0.c      | 1 +
 land/newlib/xelix/sys/xelix.h | 3 +++
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/land/newlib/xelix/Makefile.am b/land/newlib/xelix/Makefile.am
index 38656df2..21475edd 100644
--- a/land/newlib/xelix/Makefile.am
+++ b/land/newlib/xelix/Makefile.am
@@ -9,14 +9,14 @@ AM_CCASFLAGS = $(INCLUDES)
 noinst_LIBRARIES = lib.a
 
 if MAY_SUPPLY_SYSCALLS
-extra_objs = $(lpfx)syscalls.o stubs.o inet_addr.o inet_ntoa.o getgrent.o mntent.o mntent_r.o getaddrinfo.o openpty.o pututline.o select.o
+extra_objs = $(lpfx)syscalls.o stubs.o inet_addr.o inet_ntoa.o getgrent.o mntent.o mntent_r.o getaddrinfo.o openpty.o pututline.o select.o xelix.o
 else
 extra_objs =
 endif
 
 lib_a_SOURCES =
 lib_a_LIBADD = $(extra_objs)
-EXTRA_lib_a_SOURCES = crt0.c crti.s crtn.s syscalls.c stubs.c inet_addr.c inet_ntoa.c getgrent.c mntent.c mntent_r.c getaddrinfo.c openpty.c pututline.c select.c
+EXTRA_lib_a_SOURCES = crt0.c crti.s crtn.s syscalls.c stubs.c inet_addr.c inet_ntoa.c getgrent.c mntent.c mntent_r.c getaddrinfo.c openpty.c pututline.c select.c xelix.c
 lib_a_DEPENDENCIES = $(extra_objs)
 lib_a_CCASFLAGS = $(AM_CCASFLAGS)
 lib_a_CFLAGS = $(AM_CFLAGS)
diff --git a/land/newlib/xelix/crt0.c b/land/newlib/xelix/crt0.c
index 0e8ab418..2722d346 100644
--- a/land/newlib/xelix/crt0.c
+++ b/land/newlib/xelix/crt0.c
@@ -32,6 +32,7 @@ extern void __libc_fini_array();
 // These are defined as extern in sys/xelix.h
 struct _xelix_execdata* _xelix_execdata;
 char* _progname;
+FILE* _xelix_serial = NULL;
 
 void __attribute__((fastcall, noreturn)) _start(void) {
 	__libc_init_array();
diff --git a/land/newlib/xelix/sys/xelix.h b/land/newlib/xelix/sys/xelix.h
index 291d302b..01a599d9 100644
--- a/land/newlib/xelix/sys/xelix.h
+++ b/land/newlib/xelix/sys/xelix.h
@@ -20,6 +20,7 @@
 #define _SYS_XELIX_H
 
 #include <stdint.h>
+#include <stdio.h>
 #include <errno.h>
 #include <limits.h>
 
@@ -45,8 +46,10 @@ struct _xelix_execdata {
 
 extern struct _xelix_execdata* _xelix_execdata;
 extern char* _progname;
+extern FILE* _xelix_serial;
 
 int _strace(void);
+void _serial_printf(const char* format, ...);
 
 #define syscall(call, a1, a2, a3) __syscall(__errno(), call, (uint32_t)a1, (uint32_t)a2, (uint32_t)a3)
 static inline uint32_t __syscall(int* errp, uint32_t call, uint32_t arg1, uint32_t arg2, uint32_t arg3) {