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LibC: Rework constructor/destructor calling

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constructors are now called in _init_libc instead of crt0

destructors are now registered with atexit() instead of called manually
This commit is contained in:
Bananymous
2025-04-15 22:29:26 +03:00
parent 066ed7e4a1
commit cf59f89bfb
4 changed files with 46 additions and 37 deletions
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34
userspace/libraries/LibC/arch/i686/crt0.S
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@@ -3,9 +3,9 @@
.global _start
_start:
pushl $0
pushl %edi
pushl %esi
pushl %edx
pushl %esi
pushl %edi
# STACK LAYOUT
# null
@@ -15,27 +15,21 @@ _start:
xorl %ebp, %ebp
# init libc (envp already as argument)
pushl $__fini_array_end
pushl $__fini_array_start
pushl $_fini
pushl $__init_array_end
pushl $__init_array_start
pushl $_init
pushl %edx
call _init_libc
# call global constructors
movl $_init, %eax
testl %eax, %eax
jz 1f
call *%eax
1:
addl $(4 * 8), %esp
movl $__init_array_start, %ebx
jmp 2f
1: call *(%ebx)
addl $4, %ebx
2: cmpl $__init_array_end, %ebx
jne 1b
# call main
movl 0(%esp), %eax
xchgl %eax, 8(%esp)
movl %eax, (%esp)
# argc, argv, envp already on stack
call main
subl $12, %esp