Kernel: Start the call stack with a null RBP on x86_64

2022-11-19 18:38:32 +01:00 · 2022-11-19 18:38:32 +01:00 · 424b069d55
commit 424b069d55
parent db3e34b2ba
3 changed files with 8 additions and 1 deletions
--- a/kernel/CMakeLists.txt
+++ b/kernel/CMakeLists.txt
@ -21,6 +21,7 @@ add_executable(moon ${SOURCES})
 if("${ARCH}" MATCHES "x86_64")
    set(ASM_SOURCES
        src/arch/x86_64/CPU.asm
+        src/arch/x86_64/Entry.asm
    )
    add_library(moon-asm STATIC ${ASM_SOURCES})
    target_link_libraries(moon moon-asm)
--- a/kernel/moon.ld
+++ b/kernel/moon.ld
@ -1,4 +1,4 @@
-ENTRY(_start)
+ENTRY(_main)
 OUTPUT_FORMAT(elf64-x86-64)

 mmio        = 0xfffffffff8000000;              /* these are configurable for level 2 loaders */
--- a/kernel/src/arch/x86_64/Entry.asm
+++ b/kernel/src/arch/x86_64/Entry.asm
@ -0,0 +1,6 @@
+global _main
+extern _start
+
+_main:
+    xor rbp, rbp
+    call _start