feat(cmake): add USE_NO_RELAX flag

Signed-off-by: Zone.N <[email protected]>

CMakePresets.json

@@ -120,6 +120,10 @@
         "CMAKE_SYSTEM_PROCESSOR": {
           "type": "STRING",
           "value": "riscv64"
+        },
+        "USE_NO_RELAX": {
+          "type": "BOOL",
+          "value": "OFF"
         }
       }
     },

cmake/compile_config.cmake

@@ -56,6 +56,14 @@ list(APPEND COMMON_LINK_OPTIONS
 list(APPEND COMMON_LINK_LIB
 )
 
+# 通用宏定义
+list(APPEND COMMON_DEFINITIONS
+)
+
+list(APPEND DEFAULT_BOOT_DEFINITIONS
+        ${COMMON_DEFINITIONS}
+)
+
 list(APPEND DEFAULT_BOOT_COMPILE_OPTIONS
         ${COMMON_COMPILE_OPTIONS}
         # 使用 2 字节 wchar_t
@@ -109,6 +117,12 @@ list(APPEND DEFAULT_BOOT_LINK_LIB
         >
 )
 
+list(APPEND DEFAULT_KERNEL_DEFINITIONS
+        ${COMMON_DEFINITIONS}
+
+        USE_NO_RELAX=$<BOOL:${USE_NO_RELAX}>
+)
+
 list(APPEND DEFAULT_KERNEL_COMPILE_OPTIONS
         ${COMMON_COMPILE_OPTIONS}
 
@@ -145,8 +159,9 @@ list(APPEND DEFAULT_KERNEL_LINK_OPTIONS
         $<$<STREQUAL:${CMAKE_SYSTEM_PROCESSOR},riscv64>:
         # 链接脚本
         -T ${CMAKE_SOURCE_DIR}/src/kernel/arch/${CMAKE_SYSTEM_PROCESSOR}/link.ld
+
         # 禁用 relax 优化
-        -mno-relax
+        $<$<BOOL:${USE_NO_RELAX}>:-mno-relax>
         >
 )
 

src/kernel/CMakeLists.txt

@@ -29,6 +29,11 @@ add_header_kernel(kernel)
 add_header_driver(kernel)
 add_header_3rd(kernel)
 
+# 添加定义
+target_compile_definitions(kernel PRIVATE 
+        ${DEFAULT_KERNEL_DEFINITIONS}
+)
+
 # 添加编译参数
 target_compile_options(kernel PRIVATE
         ${DEFAULT_KERNEL_COMPILE_OPTIONS}

src/kernel/arch/CMakeLists.txt

@@ -22,6 +22,11 @@ add_library(${PROJECT_NAME} OBJECT
         ${PROJECT_SOURCE_DIR}/${CMAKE_SYSTEM_PROCESSOR}/arch_main.cpp
 )
 
+# 添加定义
+target_compile_definitions(${PROJECT_NAME} PRIVATE 
+        ${DEFAULT_KERNEL_DEFINITIONS}
+)
+
 # 添加头文件
 add_header_libc(${PROJECT_NAME})
 add_header_libcxx(${PROJECT_NAME})

src/kernel/arch/riscv64/boot.S

@@ -22,7 +22,20 @@
 .global _boot
 .type _boot, @function
 .extern _start
+#if USE_NO_RELAX == 0
+.extern __global_pointer$
+#endif
 _boot:
+
+#if USE_NO_RELAX == 0
+    // 初始化 gp 寄存器
+    // 如果不初始化，则需要在编译时添加 -mno-relax 选项
+.option push
+.option norelax
+    la gp, __global_pointer$
+.option pop
+#endif
+
     // 设置栈地址
     la sp, stack_top
 

src/kernel/driver/CMakeLists.txt

@@ -17,6 +17,11 @@ add_library(${PROJECT_NAME}
         ${PROJECT_SOURCE_DIR}/driver.cpp
 )
 
+# 添加定义
+target_compile_definitions(${PROJECT_NAME} PRIVATE 
+        ${DEFAULT_KERNEL_DEFINITIONS}
+)
+
 # 添加头文件
 add_header_driver(${PROJECT_NAME})
 

src/kernel/driver/ns16550a/CMakeLists.txt

@@ -17,6 +17,11 @@ add_library(${PROJECT_NAME}
         ${PROJECT_SOURCE_DIR}/ns16550a.cpp
 )
 
+# 添加定义
+target_compile_definitions(${PROJECT_NAME} PRIVATE 
+        ${DEFAULT_KERNEL_DEFINITIONS}
+)
+
 # 添加头文件
 add_header_driver(${PROJECT_NAME})
 

src/kernel/libc/CMakeLists.txt

@@ -18,6 +18,11 @@ add_library(${PROJECT_NAME} OBJECT
         ${PROJECT_SOURCE_DIR}/stdio.c
 )
 
+# 添加定义
+target_compile_definitions(${PROJECT_NAME} PRIVATE 
+        ${DEFAULT_KERNEL_DEFINITIONS}
+)
+
 # 添加头文件
 add_header_libc(${PROJECT_NAME})
 

src/kernel/libcxx/CMakeLists.txt

@@ -17,6 +17,11 @@ add_library(${PROJECT_NAME} OBJECT
         ${PROJECT_SOURCE_DIR}/libcxx.cpp
 )
 
+# 添加定义
+target_compile_definitions(${PROJECT_NAME} PRIVATE 
+        ${DEFAULT_KERNEL_DEFINITIONS}
+)
+
 # 添加头文件
 add_header_libc(${PROJECT_NAME})
 add_header_libcxx(${PROJECT_NAME})

src/kernel/libcxx/libcxx.cpp

@@ -25,6 +25,7 @@ extern ctor_t __init_array_end[];
 
 void cpp_init(void) {
   for (auto ctor = __init_array_start; ctor < __init_array_end; ctor++) {
+    /// @todo x86_64 crashed
     (*ctor)();
   }
 }

src/kernel/main.cpp

@@ -32,18 +32,18 @@ class aaa {
   aaa(int _a) : a(_a) { printf("aaa init %d\n", _a); }
 };
 
-// auto class_a = aaa(2);
-// static aaa class_a2 = aaa(3);
+auto class_a = aaa(2);
+static aaa class_a2 = aaa(3);
 int i32;
 static int si32;
 
 int main(int _argc, char** _argv) {
   // 架构相关初始化
   auto arch_init_ret = arch_init(_argc, reinterpret_cast<uint8_t**>(_argv));
 
-  // printf("class_a.a: %d\n", class_a.a);
-  // printf("&class_a: %p\n", &class_a);
-  // printf("&class_a2: %p\n", &class_a2);
+  printf("class_a.a: %d\n", class_a.a);
+  printf("&class_a: %p\n", &class_a);
+  printf("&class_a2: %p\n", &class_a2);
   printf("&i32: %p\n", &i32);
   printf("&si32: %p\n", &si32);
   printf("*(&si32): %p\n", *(&si32));