From 3ad06ac1f87017e862d9c8bf08f4a5d15758bc6a Mon Sep 17 00:00:00 2001
From: "Chloe M." <chloe@mensia.org>
Date: Mon, 22 Jun 2026 01:24:57 +0000
Subject: [PATCH] paw: spkg: Add support package groundwork

Signed-off-by: Chloe M. <chloe@mensia.org>
---
 build.sh                     |  4 ++++
 paw/Makefile                 | 16 ++++++++++++++++
 paw/spkg/Makefile            | 25 +++++++++++++++++++++++++
 paw/spkg/head/string.h       | 25 +++++++++++++++++++++++++
 paw/spkg/lib/memcmp.c        | 32 ++++++++++++++++++++++++++++++++
 paw/stos/arch/amd64/Makefile |  1 +
 paw/stos/ke/Makefile         |  4 +++-
 7 files changed, 106 insertions(+), 1 deletion(-)
 create mode 100644 paw/Makefile
 create mode 100644 paw/spkg/Makefile
 create mode 100644 paw/spkg/head/string.h
 create mode 100644 paw/spkg/lib/memcmp.c

diff --git a/build.sh b/build.sh
index 46b3c16..e571941 100755
--- a/build.sh
+++ b/build.sh
@@ -63,6 +63,10 @@ make_build() {
 build() {
     mkdir -p artifacts/
 
+    make_build      \
+        paw/        \
+        "Building world..."
+
     make_build      \
         paw/host    \
         "Building host utils..."
diff --git a/paw/Makefile b/paw/Makefile
new file mode 100644
index 0000000..5f9edbc
--- /dev/null
+++ b/paw/Makefile
@@ -0,0 +1,16 @@
+#
+# Copyright (c) 2026, Chloe M.
+# Provided under the BSD-3 clause
+#
+# Description:  OS world build script
+# Author:		Chloe M.
+#
+
+include mk/stos.mk
+
+.PHONY: all
+all: spkg
+
+.PHONY: spkg
+spkg:
+	cd spkg/; $(MAKE) $(PASSDOWN_ARGS)
diff --git a/paw/spkg/Makefile b/paw/spkg/Makefile
new file mode 100644
index 0000000..b2e88c2
--- /dev/null
+++ b/paw/spkg/Makefile
@@ -0,0 +1,25 @@
+#
+# Copyright (c) 2026, Chloe M.
+# Provided under the BSD-3 clause
+#
+# Description:  Support package build script
+# Author:		Chloe M.
+#
+
+.SILENT:
+include ../mk/stos.mk
+
+CFILES = $(shell find . -name "*.c")
+OFILES = $(CFILES:.c=.o)
+
+CFLAGS = 			\
+	$(SYS_CFLAGS)	\
+	-Ihead			\
+	-I$(ST_PROJECT_ROOT)/sdk/head
+
+.PHONY: all
+all: $(OFILES)
+
+%.o: %.c
+	$(PROMPT) "CC" $<
+	$(SYS_CC) -c $(CFLAGS) $< -o $@
diff --git a/paw/spkg/head/string.h b/paw/spkg/head/string.h
new file mode 100644
index 0000000..d7cfbf3
--- /dev/null
+++ b/paw/spkg/head/string.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2026, Chloe M.
+ * Provided under the BSD-3 clause.
+ *
+ * Description: String helpers
+ * Author:      Chloe M.
+ */
+
+#ifndef _SPKG_STRING_H_
+#define _SPKG_STRING_H_ 1
+
+#include <stdef.h>
+
+/*
+ * Compare the differences between two strings
+ *
+ * @Buffer1: First buffer to compare
+ * @Buffer2: Second buffer to compare
+ * @Length:  Number of bytes to compare
+ *
+ * Returns the differences
+ */
+LONG RtlMemCmp(const VOID *Buffer1, const VOID *Buffer2, USIZE Length);
+
+#endif  /* !_SPKG_STRING_H_ */
diff --git a/paw/spkg/lib/memcmp.c b/paw/spkg/lib/memcmp.c
new file mode 100644
index 0000000..5b57ec8
--- /dev/null
+++ b/paw/spkg/lib/memcmp.c
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2026, Chloe M.
+ * Provided under the BSD-3 clause.
+ *
+ * Description: RtlMemCmp() implementation
+ * Author:      Chloe M.
+ */
+
+#include <string.h>
+
+LONG
+RtlMemCmp(const VOID *Buffer1, const VOID *Buffer2, USIZE Length)
+{
+    const UCHAR *Ptr1 = Buffer1;
+    const UCHAR *Ptr2 = Buffer2;
+
+    if (Buffer1 == NULL || Buffer2 == NULL) {
+        return 0;
+    }
+
+    if (Length == 0) {
+        return 0;
+    }
+
+    do {
+        if (*Ptr1++ != *Ptr2++) {
+            return (*--Ptr1 - *--Ptr2);
+        }
+    } while (--Length != 0);
+
+    return 0;
+}
diff --git a/paw/stos/arch/amd64/Makefile b/paw/stos/arch/amd64/Makefile
index 1c6b0aa..d7fc37f 100644
--- a/paw/stos/arch/amd64/Makefile
+++ b/paw/stos/arch/amd64/Makefile
@@ -13,6 +13,7 @@ ASMFILES = $(shell find . -name "*.S")
 ASMOFILES = $(ASMFILES:.S=.S.o)
 
 MISC_OFILES = $(ASMOFILES)
+MISC_OFILES += $(shell find $(ST_PROJECT_ROOT)/paw/spkg/ -name "*.o")
 MISC_OFILES += $(shell find $(ST_PROJECT_ROOT)/paw/stos/ -name "*.o" | grep -v "arch")
 
 KERNEL_PATH =       \
diff --git a/paw/stos/ke/Makefile b/paw/stos/ke/Makefile
index f60939d..dcfa06f 100644
--- a/paw/stos/ke/Makefile
+++ b/paw/stos/ke/Makefile
@@ -23,7 +23,9 @@ CFLAGS =			\
 	-DPRINTF_DISABLE_SUPPORT_PTRDIFF_T \
 	-DPRINTF_DISABLE_SUPPORT_FLOAT	   \
 	-I../head						   \
-	-I$(ST_PROJECT_ROOT)/sdk/head
+	-I$(ST_PROJECT_ROOT)/paw/spkg/head \
+	-I$(ST_PROJECT_ROOT)/sdk/head	   \
+	-D_BOOT_PROTO="\"$(ST_BOOT_PROTOCOL)\""
 
 .PHONY: all
 all: $(OFILES)