cba54b205b
- refactor code for transfer buffer reads/writes, real mode int 0x21 calls, and assembler segment declarations - define transfer buffer size in one place - beef up error checking for transfer buffer operations (prevent buffer overflows) - also optimize such operations to transfer dword by dword where feasible
31 lines
397 B
ArmAsm
31 lines
397 B
ArmAsm
#
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! $Source$
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! $State$
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! $Revision$
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#include "libsysasm.h"
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! Say whether a given file descriptor number refers to a terminal.
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.define _isatty
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_isatty:
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mov ebx, esp
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mov ebx, 4(ebx)
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o16 mov ax, 0x4400
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int 0x21
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jc error
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testb dl, dl
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jz not_tty
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mov eax, 1
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ret
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not_tty:
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mov (_errno), 25 ! ENOTTY
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not_tty_2:
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xor eax, eax
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ret
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error:
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push eax
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call __sys_seterrno
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pop ecx
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jmp not_tty_2
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