From 36f0c65401337edce7d1577ef45ee3dea520920e Mon Sep 17 00:00:00 2001
From: renzehua <renzehua3@huawei.com>
Date: Fri, 5 May 2023 21:50:59 +0800
Subject: [PATCH] PAC-FWD-CFI DATA:5.5

Signed-off-by: renzehua <renzehua3@huawei.com>
---
 pac/arm64/include/asm_pointer_init.h | 16 +++++++++++++
 pac/arm64/include/pauth.h            | 36 ++++++++++++++++++++++++++++
 pac/arm64/src/asm_pointer_init.S     | 32 +++++++++++++++++++++++++
 3 files changed, 84 insertions(+)
 create mode 100644 pac/arm64/include/asm_pointer_init.h
 create mode 100644 pac/arm64/include/pauth.h
 create mode 100644 pac/arm64/src/asm_pointer_init.S

diff --git a/pac/arm64/include/asm_pointer_init.h b/pac/arm64/include/asm_pointer_init.h
new file mode 100644
index 0000000..ca4f770
--- /dev/null
+++ b/pac/arm64/include/asm_pointer_init.h
@@ -0,0 +1,16 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *
+ * Copyright (c) 2023 Huawei Device Co., Ltd.
+ *
+ * Global Pointers initialization.
+ *
+ */
+
+#ifndef __ASM_POINTER_INIT_H
+#define __ASM_POINTER_INIT_H
+
+#ifdef CONFIG_ARM64_PTR_AUTH_FWD_CFI
+    void ptrauth_init_globals(void);
+#endif
+#endif
diff --git a/pac/arm64/include/pauth.h b/pac/arm64/include/pauth.h
new file mode 100644
index 0000000..dbf667d
--- /dev/null
+++ b/pac/arm64/include/pauth.h
@@ -0,0 +1,36 @@
+#ifndef __ASM_PAUTH_H
+#define __ASM_PAUTH_H
+
+#ifdef CONFIG_ARM64_PTR_AUTH_EXT
+#define pauth_common(prefix, type, key, addr, mod) \
+({  \
+    const void *__addr = (addr);    \
+    unsigned long __mod = (unsigned long)(mod);  \
+\
+    if (__builtin_constant_p(mod) && (__mod == 0))  \
+        asm(#prefix #type "z" #key " %0\n" : "+r" (__addr)); \
+    else    \
+        asm(#prefix #type #key  " %0, %1\n" : "+r" (__addr) :   \
+            "r" (__mod)); \
+    (typeof (addr))(__addr);    \
+})
+
+#define pauth_sign_ptr_parameter(fun, mod, key) \
+({  /
+    const void * __fun = fun;   \
+    unsigned long __mod = (unsigned long)mod;   \
+    asm("paci" #key  " %0, %1\n" : "+r" (__fun) :   \
+            "r" (__mod));   \
+    (void *)__fun;  \
+})
+
+#define pauth_autia(addr, mod) pauth_common(aut, i, a, addr, mod)
+#define pauth_autib(addr, mod) pauth_common(aut, i, b, addr, mod)
+
+#define pauth_pacia(addr, mod) pauth_common(pac, i, a, addr, mod)
+#define pauth_pacib(addr, mod) pauth_common(pac, i, b, addr, mod)
+
+
+
+#endif //CONFIG_ARM64_PTR_AUTH_EXT
+#endif
diff --git a/pac/arm64/src/asm_pointer_init.S b/pac/arm64/src/asm_pointer_init.S
new file mode 100644
index 0000000..fb08603
--- /dev/null
+++ b/pac/arm64/src/asm_pointer_init.S
@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *
+ * Copyright (c) 2023 Huawei Device Co., Ltd.
+ *
+ * Global Pointers initialization.
+ *
+ */
+ 
+ #include <linux/linkage.h>
+ #include <linux/init.h>
+ #include <asm/assembler.h>
+
+ .pushsection ".init.text", "ax"
+ 
+ SYM_CODE_START(ptrauth_init_globals)
+    mov x21, x30
+    adrp    x19, __ctors_end
+    adrp    x20, __ctors_start
+    add x19, x19, #:lo12:__ctors_end
+    add x20, x20, #:lo12:__ctors_start
+    cmp x20, x19
+    b.cs    4f
+3:
+    ldr x8, [x20], #8
+    blr x8
+    cmp x20, x19
+    b.cc 3b
+4:
+    mov x30, x21
+    ret
+ SYM_CODE_END(ptrauth_init_globals)
\ No newline at end of file
-- 
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