From 414662b24a964cc97c2f7fc10d4e3a80851b734b Mon Sep 17 00:00:00 2001
From: Alex <enderice2@users.noreply.github.com>
Date: Mon, 28 Nov 2022 08:21:05 +0200
Subject: [PATCH] Added libssp

---
 libc/Makefile        |  2 ++
 libc/libssp/Makefile | 44 ++++++++++++++++++++++++++++++++++++++++++++
 libc/libssp/ssp.c    | 33 +++++++++++++++++++++++++++++++++
 3 files changed, 79 insertions(+)
 create mode 100644 libc/libssp/Makefile
 create mode 100644 libc/libssp/ssp.c

diff --git a/libc/Makefile b/libc/Makefile
index 0906be2..7f2eaea 100644
--- a/libc/Makefile
+++ b/libc/Makefile
@@ -2,9 +2,11 @@ build:
 	cp include/* ../out/system/include
 	make --quiet -C runtime build
 	make --quiet -C libgcc build
+	make --quiet -C libssp build
 	make --quiet -C src build
 
 clean:
 	make --quiet -C runtime clean
 	make --quiet -C libgcc clean
+	make --quiet -C libssp clean
 	make --quiet -C src clean
diff --git a/libc/libssp/Makefile b/libc/libssp/Makefile
new file mode 100644
index 0000000..c31b837
--- /dev/null
+++ b/libc/libssp/Makefile
@@ -0,0 +1,44 @@
+# Config file
+include ../../../Makefile.conf
+
+NAME=ssp
+
+OBJECT_NAME=lib$(NAME).a
+
+OUTPUT_DIR=../../out/system/lib/
+
+CC = ../../../$(COMPILER_PATH)/$(COMPILER_ARCH)gcc
+AR = ../../../$(COMPILER_PATH)/$(COMPILER_ARCH)ar
+NASM = /usr/bin/nasm
+
+C_SOURCES = $(shell find ./ -type f -name '*.c')
+S_SOURCES = $(shell find ./ -type f -name '*.s')
+ASM_SOURCES = $(shell find ./ -type f -name '*.asm')
+OBJ = ${C_SOURCES:.c=.o} ${ASM_SOURCES:.asm=.o} ${S_SOURCES:.s=.o}
+
+INCLUDE_DIR = ../include
+
+ifeq ($(OSARCH), amd64)
+ASM_ARCH := elf64
+else ifeq ($(OSARCH), i686)
+ASM_ARCH := elf32
+endif
+
+CFLAGS := -fPIC -I$(INCLUDE_DIR)
+
+build: $(OBJECT_NAME)
+
+$(OBJECT_NAME): $(OBJ)
+	$(AR) rcs  $(OUTPUT_DIR)$@ $(OBJ)
+
+%.o: %.c $(HEADERS) $(HEADERS2)
+	$(CC) $(CFLAGS) -std=c17 -c $< -o $@
+
+%.o: %.cpp $(HEADERS) $(HEADERS2)
+	$(CC) $(CFLAGS) -std=c++20 -c $< -o $@
+
+%.o: %.asm
+	$(NASM) $< -f $(ASM_ARCH) -o $@
+
+clean:
+
diff --git a/libc/libssp/ssp.c b/libc/libssp/ssp.c
new file mode 100644
index 0000000..e96911d
--- /dev/null
+++ b/libc/libssp/ssp.c
@@ -0,0 +1,33 @@
+#ifndef STACK_CHK_GUARD_VALUE
+#if UINTPTR_MAX == UINT32_MAX
+#define STACK_CHK_GUARD_VALUE 0xDEAD57AC
+#else
+#define STACK_CHK_GUARD_VALUE 0xDEAD57AC00000000
+#endif
+#endif
+
+__UINTPTR_TYPE__ __stack_chk_guard = 0;
+
+static void __attribute__((constructor, no_stack_protector)) __guard_setup(void)
+{
+    if (__stack_chk_guard == 0)
+        __stack_chk_guard = STACK_CHK_GUARD_VALUE;
+}
+
+__attribute__((weak, noreturn, no_stack_protector)) void __stack_chk_fail(void)
+{
+    const char *msg = "Stack smashing detected";
+    __asm__ __volatile__("syscall"
+                         :
+                         : "a"(0), "D"(0x57AC)
+                         : "rcx", "r11", "memory");
+}
+
+__attribute__((weak, noreturn, no_stack_protector)) void __chk_fail(void)
+{
+    const char *msg = "Buffer overflow detected";
+    __asm__ __volatile__("syscall"
+                         :
+                         : "a"(0), "D"(0xF700)
+                         : "rcx", "r11", "memory");
+}