diff --git a/lib/compiler-rt/builtins/assembly.h b/lib/compiler-rt/builtins/assembly.h
index 69a3d86..169d496 100644
--- a/lib/compiler-rt/builtins/assembly.h
+++ b/lib/compiler-rt/builtins/assembly.h
@@ -267,7 +267,7 @@
 #define DEFINE_COMPILERRT_FUNCTION_ALIAS(name, target)                         \
   .globl SYMBOL_NAME(name) SEPARATOR                                           \
   SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR                                  \
-  DECLARE_SYMBOL_VISIBILITY(SYMBOL_NAME(name)) SEPARATOR                       \
+  DECLARE_SYMBOL_VISIBILITY(name) SEPARATOR                                    \
   .set SYMBOL_NAME(name), SYMBOL_NAME(target) SEPARATOR
 
 #if defined(__ARM_EABI__)
diff --git a/lib/compiler-rt/builtins/int_types.h b/lib/compiler-rt/builtins/int_types.h
index 7a72de4..e94d315 100644
--- a/lib/compiler-rt/builtins/int_types.h
+++ b/lib/compiler-rt/builtins/int_types.h
@@ -64,7 +64,7 @@
 } udwords;
 
 #if defined(__LP64__) || defined(__wasm__) || defined(__mips64) ||             \
-    defined(__riscv) || defined(_WIN64)
+    defined(__SIZEOF_INT128__) || defined(_WIN64)
 #define CRT_HAS_128BIT
 #endif
 
diff --git a/lib/libc/printf.c b/lib/libc/printf.c
index e52cbed..faccfdf 100644
--- a/lib/libc/printf.c
+++ b/lib/libc/printf.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014-2021, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2014-2023, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -81,6 +81,7 @@
  * %x - hexadecimal format
  * %s - string format
  * %d or %i - signed decimal format
+ * %c - character format
  * %u - unsigned decimal format
  * %p - pointer format
  *
@@ -130,6 +131,10 @@
 				count += unsigned_num_print(unum, 10,
 							    padc, padn);
 				break;
+			case 'c':
+				(void)putchar(va_arg(args, int));
+				count++;
+				break;
 			case 's':
 				str = va_arg(args, char *);
 				count += string_print(str);
diff --git a/lib/libc/snprintf.c b/lib/libc/snprintf.c
index 0e3256c..21d3416 100644
--- a/lib/libc/snprintf.c
+++ b/lib/libc/snprintf.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2022, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2023, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -85,6 +85,7 @@
  *
  * %x (or %X) - hexadecimal format
  * %d or %i - signed decimal format
+ * %c - character format
  * %s - string format
  * %u - unsigned decimal format
  * %p - pointer format
@@ -181,6 +182,9 @@
 				unsigned_num_print(&s, n, &chars_printed,
 						   unum, 10, padc, padn, false);
 				break;
+			case 'c':
+				CHECK_AND_PUT_CHAR(s, n, chars_printed, va_arg(args, int));
+				break;
 			case 's':
 				str = va_arg(args, char *);
 				string_print(&s, n, &chars_printed, str);
diff --git a/lib/libfdt/fdt.c b/lib/libfdt/fdt.c
index 9fe7cf4..20c6415 100644
--- a/lib/libfdt/fdt.c
+++ b/lib/libfdt/fdt.c
@@ -106,7 +106,6 @@
 	}
 	hdrsize = fdt_header_size(fdt);
 	if (!can_assume(VALID_DTB)) {
-
 		if ((fdt_totalsize(fdt) < hdrsize)
 		    || (fdt_totalsize(fdt) > INT_MAX))
 			return -FDT_ERR_TRUNCATED;
@@ -115,9 +114,7 @@
 		if (!check_off_(hdrsize, fdt_totalsize(fdt),
 				fdt_off_mem_rsvmap(fdt)))
 			return -FDT_ERR_TRUNCATED;
-	}
 
-	if (!can_assume(VALID_DTB)) {
 		/* Bounds check structure block */
 		if (!can_assume(LATEST) && fdt_version(fdt) < 17) {
 			if (!check_off_(hdrsize, fdt_totalsize(fdt),
@@ -165,7 +162,7 @@
 uint32_t fdt_next_tag(const void *fdt, int startoffset, int *nextoffset)
 {
 	const fdt32_t *tagp, *lenp;
-	uint32_t tag;
+	uint32_t tag, len, sum;
 	int offset = startoffset;
 	const char *p;
 
@@ -191,12 +188,19 @@
 		lenp = fdt_offset_ptr(fdt, offset, sizeof(*lenp));
 		if (!can_assume(VALID_DTB) && !lenp)
 			return FDT_END; /* premature end */
+
+		len = fdt32_to_cpu(*lenp);
+		sum = len + offset;
+		if (!can_assume(VALID_DTB) &&
+		    (INT_MAX <= sum || sum < (uint32_t) offset))
+			return FDT_END; /* premature end */
+
 		/* skip-name offset, length and value */
-		offset += sizeof(struct fdt_property) - FDT_TAGSIZE
-			+ fdt32_to_cpu(*lenp);
+		offset += sizeof(struct fdt_property) - FDT_TAGSIZE + len;
+
 		if (!can_assume(LATEST) &&
-		    fdt_version(fdt) < 0x10 && fdt32_to_cpu(*lenp) >= 8 &&
-		    ((offset - fdt32_to_cpu(*lenp)) % 8) != 0)
+		    fdt_version(fdt) < 0x10 && len >= 8 &&
+		    ((offset - len) % 8) != 0)
 			offset += 4;
 		break;