[libc] Pull crt0 out into its own module

Sorta. crt0 is a separate module as far as bonnibel is concerned, but it's still part of the libc module file.
2025-12-10 00:14:32 -08:00 · 2024-02-13 22:41:40 -08:00
parent 75d30fb56d
commit ba6e8e1349
7 changed files with 28 additions and 4 deletions
--- a/src/libraries/libc/arch/amd64/crt/crt0.s
+++ b/src/libraries/libc/arch/amd64/crt/crt0.s
@@ -1,10 +1,18 @@
-%include "util/got.inc"
+extern _GLOBAL_OFFSET_TABLE_

 extern main
 extern exit
 extern __init_libj6
 extern __init_libc

+; Put the address of the given symbol in rax
+; This macro is the same as in util/got.inc,
+; but crt0 can't have a dep on libutil
+%macro lookup_GOT 1
+    lea rax, [rel _GLOBAL_OFFSET_TABLE_]
+    mov rax, [rax + %1 wrt ..got]
+%endmacro
+
 global _start:function weak (_libc_crt0_start.end - _libc_crt0_start)
 global _libc_crt0_start:function (_libc_crt0_start.end - _libc_crt0_start)

--- a/src/libraries/libc/arch/amd64/crt/init.cpp
+++ b/src/libraries/libc/arch/amd64/crt/init.cpp
--- a/src/libraries/libc/arch/amd64/crt/libdl.cpp
+++ b/src/libraries/libc/arch/amd64/crt/libdl.cpp