banan-os/userspace/libraries/LibC/arch/x86_64/crt0.S

.section .text

.global _start
_start:
	pushq $0
	pushq %rdi
	pushq %rsi
	pushq %rdx

	# STACK LAYOUT
	#   null
	#   argc
	#   argv
	#   envp

	xorq %rbp, %rbp

	# init libc
	movq 0(%rsp), %rdi
	call _init_libc

	# call global constructors
	call _init

	movq $__init_array_start, %rbx
	jmp 2f
 1: call *(%rbx)
	addq $8, %rbx
 2: cmpq $__init_array_end, %rbx
	jne 1b

	# call main
	movq 16(%rsp), %rdi
	movq  8(%rsp), %rsi
	movq  0(%rsp), %rdx
	call main

	# call exit
	movq %rax, %rdi
	call exit

.size _start, . - _start
BuildSystem: cmake can now build out libc I can't seem to get libc++ build to work... 2023-04-07 02:27:15 +03:00			`.section .text`

			`.global _start`
			`_start:`
Kernel: Implement thread start trampoline for userspace This is needed on i686 to set segment registers. 2024-04-03 00:42:39 +03:00			`pushq $0`
			`pushq %rdi`
			`pushq %rsi`
			`pushq %rdx`

Kernel: Rewrite whole scheduler Current context saving was very hacky and dependant on compiler behaviour that was not consistent. Now we always use iret for context saving. This makes everything more clean. 2024-03-29 18:02:12 +02:00			`# STACK LAYOUT`
			`# null`
			`# argc`
			`# argv`
			`# envp`
BuildSystem: cmake can now build out libc I can't seem to get libc++ build to work... 2023-04-07 02:27:15 +03:00
Kernel: Rewrite whole scheduler Current context saving was very hacky and dependant on compiler behaviour that was not consistent. Now we always use iret for context saving. This makes everything more clean. 2024-03-29 18:02:12 +02:00			`xorq %rbp, %rbp`
BuildSystem: cmake can now build out libc I can't seem to get libc++ build to work... 2023-04-07 02:27:15 +03:00
Kernel: Rewrite whole scheduler Current context saving was very hacky and dependant on compiler behaviour that was not consistent. Now we always use iret for context saving. This makes everything more clean. 2024-03-29 18:02:12 +02:00			`# init libc`
			`movq 0(%rsp), %rdi`
Kernel/LibC: opening standard files is done in libc 2023-05-29 20:21:19 +03:00			`call _init_libc`
BuildSystem: cmake can now build out libc I can't seem to get libc++ build to work... 2023-04-07 02:27:15 +03:00
Kernel: Rewrite whole scheduler Current context saving was very hacky and dependant on compiler behaviour that was not consistent. Now we always use iret for context saving. This makes everything more clean. 2024-03-29 18:02:12 +02:00			`# call global constructors`
BuildSystem: cmake can now build out libc I can't seem to get libc++ build to work... 2023-04-07 02:27:15 +03:00			`call _init`

Kernel/LibC: Add support for init_array and fini_array 2024-08-26 14:04:58 +03:00			`movq $__init_array_start, %rbx`
			`jmp 2f`
Userspace: Remove unnecessary mov instruction from crt0 2024-09-05 12:59:05 +03:00			`1: call *(%rbx)`
Kernel/LibC: Add support for init_array and fini_array 2024-08-26 14:04:58 +03:00			`addq $8, %rbx`
			`2: cmpq $__init_array_end, %rbx`
			`jne 1b`

Kernel: Rewrite whole scheduler Current context saving was very hacky and dependant on compiler behaviour that was not consistent. Now we always use iret for context saving. This makes everything more clean. 2024-03-29 18:02:12 +02:00			`# call main`
			`movq 16(%rsp), %rdi`
			`movq 8(%rsp), %rsi`
			`movq 0(%rsp), %rdx`
BuildSystem: cmake can now build out libc I can't seem to get libc++ build to work... 2023-04-07 02:27:15 +03:00			`call main`

Kernel: Rewrite whole scheduler Current context saving was very hacky and dependant on compiler behaviour that was not consistent. Now we always use iret for context saving. This makes everything more clean. 2024-03-29 18:02:12 +02:00			`# call exit`
			`movq %rax, %rdi`
BuildSystem: cmake can now build out libc I can't seem to get libc++ build to work... 2023-04-07 02:27:15 +03:00			`call exit`
Kernel/LibC: Add crt* files to LibC and remove crt0 from kernel There was no reason for libc get crt0 from kernel. 2023-10-30 11:06:13 +02:00
BuildSystem: cmake can now build out libc I can't seem to get libc++ build to work... 2023-04-07 02:27:15 +03:00			`.size _start, . - _start`