From c04bfe41ccf06cafac28f4037380131441044556 Mon Sep 17 00:00:00 2001
From: Zhipeng Xie <xiezhipeng1@huawei.com>
Date: Sun, 14 Nov 2021 17:26:59 +0800
Subject: [PATCH 03/38] create-diff-object:support
 kpatch_line_macro_change_only on aarch64

implement kpatch_line_macro_change_only on aarch64

Signed-off-by: Zhipeng Xie <xiezhipeng1@huawei.com>
---
 kpatch-build/create-diff-object.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/kpatch-build/create-diff-object.c b/kpatch-build/create-diff-object.c
index 4a5a180..f854eca 100644
--- a/kpatch-build/create-diff-object.c
+++ b/kpatch-build/create-diff-object.c
@@ -691,6 +691,17 @@ static bool insn_is_load_immediate(struct kpatch_elf *kelf, void *addr)
 
 		break;
 
+	case ARM64:
+		/*
+		 * aarch64 immediate move insns is Little-Endian:
+		 *
+		 *   52 80 00 41     mov	 w1, #0x2
+		 */
+		if ((insn[3] & 0x7f) == 0x52 && (insn[2] & 0x80) == 0x80)
+			return true;
+
+		break;
+
 	case S390:
 		/* arg2: lghi %r3, imm */
 		if (insn[0] == 0xa7 && insn[1] == 0x39)
@@ -742,6 +753,7 @@ static bool kpatch_line_macro_change_only(struct kpatch_elf *kelf,
 	void *data1, *data2, *insn1, *insn2;
 	struct rela *r, *rela;
 	bool found, found_any = false;
+	unsigned int mov_imm_mask = ((1<<16) - 1)<<5;
 
 	if (sec->status != CHANGED ||
 	    is_rela_section(sec) ||
@@ -787,6 +799,10 @@ static bool kpatch_line_macro_change_only(struct kpatch_elf *kelf,
 		    !insn_is_load_immediate(kelf, insn2))
 			return false;
 
+		if ((*(int *)(insn1) & ~mov_imm_mask) !=
+				(*(int *)(insn2) & ~mov_imm_mask))
+			return false;
+
 		found = false;
 		list_for_each_entry(r, &sec->rela->relas, list) {
 
-- 
2.33.0