8375870af6
- Allow constant id specification - Define function signature in SYSCALL macro - Move implementation into src/kernel/syscalls/*.cpp
80 lines
814 B
ArmAsm
80 lines
814 B
ArmAsm
section .bss
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mymessage:
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resq 1024
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extern main
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extern exit
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section .text
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global getpid
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getpid:
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push rbp
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mov rbp, rsp
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mov rax, 0x02 ; getpid syscall
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syscall ; pid is now already in rax, so just return
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pop rbp
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ret
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global debug
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debug:
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push rbp
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mov rbp, rsp
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mov rax, 0x00 ; debug syscall
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syscall
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pop rbp
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ret
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global sleep
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sleep:
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push rbp
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mov rbp, rsp
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mov rax, 0x21 ; sleep syscall
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syscall
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pop rbp
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ret
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global fork
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fork:
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push rbp
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mov rbp, rsp
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mov rax, 0x00
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syscall ; pid left in rax
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pop rbp
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ret
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global message
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message:
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push rbp
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mov rbp, rsp
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; message should already be in rdi
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mov rax, 0x10
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syscall
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pop rbp
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ret
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global _start
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_start:
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xor rbp, rbp ; Sentinel rbp
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push rbp
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push rbp
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mov rbp, rsp
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mov rdi, 0
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mov rsi, 0
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call main
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mov rdi, rax
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call exit
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