From 7523d8ba3e5c236ec84ab2a83d8f45b8c469c8a2 Mon Sep 17 00:00:00 2001
From: acevest <zhaoyanbai@126.com>
Date: Sat, 13 Apr 2024 18:47:41 +0800
Subject: [PATCH] =?utf8?q?=E4=BB=A5=E4=B8=80=E7=A7=8D=E6=9B=B4=E7=AE=80?=
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---
 scripts/link.ld | 21 ++++++++++++++-------
 1 file changed, 14 insertions(+), 7 deletions(-)

diff --git a/scripts/link.ld b/scripts/link.ld
index 5736596..0bf67e7 100644
--- a/scripts/link.ld
+++ b/scripts/link.ld
@@ -16,16 +16,21 @@
 
 OUTPUT_FORMAT("elf32-i386")
 ENTRY(kernel_entry)
+
+/* 内核加载的物理地址 */
 kernel_loaded_physic_addr = 0x100000;
+/* 内核虚拟地址空间的起始地址 */
 kernel_virtual_addr_start = 0xC0000000;
+/* 内核起始地址在虚拟地址空间中的起始地址 */
 kernel_begin = kernel_virtual_addr_start + kernel_loaded_physic_addr;
+
+
 SECTIONS
 {
     . = kernel_begin;
-    .text : AT(phys_addr) ALIGN(0x1000)
+    .text : AT(kernel_loaded_physic_addr) ALIGN(0x1000)
     {
         code = .;
-        phys_addr = . - kernel_virtual_addr_start;
         *(.kernel_entry_text)
         *(.multiboot2_header)
         /* 单独把 multiboot.S 的 .text 放在这个位置是为了便于调试，实际是可以不写这一句的 */
@@ -35,20 +40,22 @@ SECTIONS
         *(.sysexit) /* last */
     }
     etext = .;
-    .data : AT(phys_addr) ALIGN(0x1000)
+
+    /* 后续节的物理地址(也就是 LMA: Load Memory Address 加载内存地址)会根据 .text 节的自动计算，不用再每个都写一遍 AT 指令了 */
+
+    .data : ALIGN(0x1000)
     {
         data = .;
-        phys_addr = . - kernel_virtual_addr_start;
         *(.data)
     }
     edata = .;
-    .bss : AT(phys_addr)  ALIGN(0x1000)
+
+
+    .bss : ALIGN(0x1000)
     {
         bss = .;
-        phys_addr = . - kernel_virtual_addr_start;
         *(.bss);
     }
-
     ebss = .;
 
     end = .;
-- 
2.44.0