48 lines
603 B
ArmAsm
48 lines
603 B
ArmAsm
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#
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! $Source$
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! $State$
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! $Revision$
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#include "syscalls.h"
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! Declare segments (the order is important).
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.sect .text
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.sect .rom
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.sect .data
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.sect .bss
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.sect .text
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EINVAL = 22
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! Perform a Linux system call.
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.define __syscall
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__syscall:
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mov eax, 4(esp)
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mov ebx, 8(esp)
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mov ecx, 12(esp)
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mov edx, 16(esp)
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int 0x80
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or eax, eax
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jl 1f
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ret
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1:
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neg eax
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! It just so happens that errnos 1-34 are the same in Linux as in the ACK.
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cmp eax, 1
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jb 2f
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cmp eax, 34
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ja 2f
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mov (_errno), eax
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3:
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mov eax, -1
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ret
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2:
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! All other errnos become EINVAL for now. FIXME dtrg.
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mov (_errno), EINVAL
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jmp 3b
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