banan-os/kernel/arch/x86_64/crt0.S

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ArmAsm
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.section .text
.global _start
_start:
# Set up end of the stack frame linked list.
movq $0, %rbp
pushq %rbp # rip=0
pushq %rbp # rbp=0
movq %rsp, %rbp
# We need those in a moment when we call main.
pushq %rsi
pushq %rdi
# Prepare signals, memory allocation, stdio and such.
call _init_libc
# Run the global constructors.
call _init
# Restore argc and argv.
popq %rdi
popq %rsi
# Run main
call main
# Terminate the process with the exit code.
movl %eax, %edi
call exit
.size _start, . - _start