dev-lang/mono: fix build on arm64; backport UB fix

Closes: https://bugs.gentoo.org/960113
Signed-off-by: Sam James <sam@gentoo.org>

dev-lang/mono/files/mono-6.14.1-c99-arm64.patch

@@ -0,0 +1,31 @@
+https://bugs.gentoo.org/960113
+https://gitlab.winehq.org/mono/mono/-/commit/2224c6915a98f870cc9a3a9f9e3698e7b20e3d27
+
+From 2224c6915a98f870cc9a3a9f9e3698e7b20e3d27 Mon Sep 17 00:00:00 2001
+From: Esme Povirk <esme@codeweavers.com>
+Date: Sat, 12 Apr 2025 20:31:54 +0000
+Subject: [PATCH] arm64: Fix a pointer-to-int cast size mismatch.
+
+---
+ mono/utils/mono-sigcontext.h | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/mono/utils/mono-sigcontext.h b/mono/utils/mono-sigcontext.h
+index 2153c1cad57..6426f44b7c7 100644
+--- a/mono/utils/mono-sigcontext.h
++++ b/mono/utils/mono-sigcontext.h
+@@ -492,6 +492,12 @@ typedef struct ucontext {
+ 	#define UCONTEXT_REG_SP(ctx) (((ucontext_t*)(ctx))->uc_mcontext.sp)
+ 	#define UCONTEXT_REG_R0(ctx) (((ucontext_t*)(ctx))->uc_mcontext.regs [ARMREG_R0])
+ 	#define UCONTEXT_GREGS(ctx) (&(((ucontext_t*)(ctx))->uc_mcontext.regs))
++	#define UCONTEXT_REG_SET_PC(ctx, val) do { \
++		UCONTEXT_REG_PC (ctx) = (gsize)(val); \
++		 } while (0)
++	#define UCONTEXT_REG_SET_SP(ctx, val) do { \
++		UCONTEXT_REG_SP (ctx) = (val); \
++		 } while (0)
+ #endif
+ 
+ #ifndef UCONTEXT_REG_SET_PC
+-- 
+GitLab

dev-lang/mono/files/mono-6.14.1-strcpy-overlap.patch

@@ -0,0 +1,28 @@
+https://gitlab.winehq.org/mono/mono/-/commit/dee6acaeb59e46661efd4ca2018cdd1c275d2a09
+
+From dee6acaeb59e46661efd4ca2018cdd1c275d2a09 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Bernhard=20=C3=9Cbelacker?= <bernhardu@mailbox.org>
+Date: Wed, 3 Sep 2025 22:28:13 +0200
+Subject: [PATCH] Avoid strcpy on overlapping strings in mono_path_canonicalize
+ (ASan).
+
+Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=57691
+---
+ mono/utils/mono-path.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/mono/utils/mono-path.c b/mono/utils/mono-path.c
+index 2f4790666a4..a9924732902 100644
+--- a/mono/utils/mono-path.c
++++ b/mono/utils/mono-path.c
+@@ -87,7 +87,7 @@ mono_path_canonicalize (const char *path)
+ 		lastpos = lastpos-1;
+ #endif
+ 	
+-	if (dest != lastpos) strcpy (dest, lastpos);
++	if (dest != lastpos) memmove (dest, lastpos, strlen(lastpos) + 1);
+ 	
+ 	g_strreverse (abspath);
+ 
+-- 
+GitLab

dev-lang/mono/mono-6.14.1-r1.ebuild

@@ -39,6 +39,8 @@ BDEPEND="
 PATCHES=(
 	"${FILESDIR}"/${PN}-6.14.1-disable-automagic-ccache.patch
 	"${FILESDIR}"/${PN}-6.12.0.199-configure-c99.patch
+	"${FILESDIR}"/${PN}-6.14.1-c99-arm64.patch
+	"${FILESDIR}"/${PN}-6.14.1-strcpy-overlap.patch
 )
 
 pkg_pretend() {