lib: Add libstr library

Signed-off-by: Ian Moffett <ian@mirocom.org>

usr/src/Makefile

@@ -12,7 +12,11 @@
 include mk/sys.mk
 
 .PHONY: all
-all: sp1 boot
+all: lib sp1 boot
+
+.PHONY: lib
+lib:
+	cd lib/; $(MAKE)
 
 .PHONY: boot
 boot:

usr/src/lib/Makefile

@@ -0,0 +1,19 @@
+#
+# Copyright (c) 2026, Mirocom Laboratories
+# All rights reserved.
+#
+# The following sources are CONFIDENTIAL and PROPRIETARY
+# property of Mirocom Laboratories. Unauthorized copying,
+# use, distrubution or modification of this file, in whole
+# and in part, is strictly prohibited without the prior written
+# consent from Mirocom Laboratories.
+#
+
+include ../mk/sys.mk
+
+.PHONY: all
+all: libstr
+
+.PHONY: libstr
+libstr:
+	cd libstr/; $(MAKE) $(PASSDOWN_ARGS)

usr/src/lib/libstr/Makefile

@@ -0,0 +1,22 @@
+#
+# Copyright (c) 2026, Mirocom Laboratories
+# All rights reserved.
+#
+# The following sources are CONFIDENTIAL and PROPRIETARY
+# property of Mirocom Laboratories. Unauthorized copying,
+# use, distrubution or modification of this file, in whole
+# and in part, is strictly prohibited without the prior written
+# consent from Mirocom Laboratories.
+#
+
+CFILES = $(shell find . -name "*.c")
+OFILES = $(CFILES:.c=.o)
+
+CC = ../../../../$(SYS_CC)
+CFLAGS = $(SYS_CFLAGS) -I../../head -D_SP1_SOURCE
+
+.PHONY: all
+all: $(OFILES)
+
+%.o: %.c
+	$(CC) -c $< $(CFLAGS) -o $@

usr/src/lib/libstr/memcmp.c

@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2026, Mirocom Laboratories
+ * All rights reserved.
+ *
+ * The following sources are CONFIDENTIAL and PROPRIETARY
+ * property of Mirocom Laboratories. Unauthorized copying,
+ * use, distribution or modification of this file, in whole
+ * and in part, is strictly prohibited without the prior written
+ * consent from Mirocom Laboratories.
+ */
+
+#include <string.h>
+
+int
+memcmp(const void *s1, const void *s2, __size_t n)
+{
+	if (n != 0) {
+        const unsigned char *p1 = s1, *p2 = s2;
+
+		do {
+			if (*p1++ != *p2++) {
+				return (*--p1 - *--p2);
+            }
+		} while (--n != 0);
+    }
+	return 0;
+}

usr/src/lib/libstr/memcpy.c

@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2026, Mirocom Laboratories
+ * All rights reserved.
+ *
+ * The following sources are CONFIDENTIAL and PROPRIETARY
+ * property of Mirocom Laboratories. Unauthorized copying,
+ * use, distribution or modification of this file, in whole
+ * and in part, is strictly prohibited without the prior written
+ * consent from Mirocom Laboratories.
+ */
+
+#include <string.h>
+
+void *
+memcpy(void *dest, const void *src, size_t count)
+{
+    if (dest == NULL || src == NULL) {
+        return NULL;
+    }
+
+    for (size_t i = 0; i < count; ++i) {
+        ((char *)dest)[i] = ((char *)src)[i];
+    }
+
+    return dest;
+}

usr/src/lib/libstr/memset.c

@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2026, Mirocom Laboratories
+ * All rights reserved.
+ *
+ * The following sources are CONFIDENTIAL and PROPRIETARY
+ * property of Mirocom Laboratories. Unauthorized copying,
+ * use, distribution or modification of this file, in whole
+ * and in part, is strictly prohibited without the prior written
+ * consent from Mirocom Laboratories.
+ */
+
+#include <string.h>
+
+void *
+memset(void *s, int c, size_t n)
+{
+    if (s == NULL) {
+        return NULL;
+    }
+
+    for (size_t i = 0; i < n; ++i) {
+        ((uint8_t *)s)[i] = c;
+    }
+
+    return s;
+}

usr/src/sp1/amd64/Makefile

@@ -11,7 +11,9 @@
 
 ASMFILES = $(shell find . -name "*.S")
 ASMOFILES = $(ASMFILES:.S=.S.o)
-MISC_OFILES = $(shell find ../common -name "*.o")
+
+MISC_OFILES = $(shell find ../ -name "*.o")
+LIB_OFILES = $(shell find ../../lib/ -name "*.o")
 
 CC = 				\
 	../../../../$(SYS_CC)
@@ -27,7 +29,7 @@ all: $(ASMOFILES)
 	$(LD) 			   \
 		-Tconf/link.ld \
 		$(MISC_OFILES) \
-		$(ASMOFILES)   \
+		$(LIB_OFILES)  \
 		-o ../../../../sp1.sys
 
 %.S.o: %.S