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
19 lines
256 B
ArmAsm
19 lines
256 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 valid open file
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! descriptor.
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.define __sys_isopen
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__sys_isopen:
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mov ebx, 4(esp)
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mov eax, 0x4400
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int 0x21
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sbb eax, eax
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inc eax
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ret
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