93 lines
2.2 KiB
NASM
93 lines
2.2 KiB
NASM
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page ,132
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title crt0fp - floating point not loaded trap
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;***
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;crt0fp.asm - floating point not loaded trap
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;
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; Copyright (c) 1986-1988, Microsoft Corporation, All Rights Reserved
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;
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;Purpose:
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; To trap certain cases where certain necessary floating-point
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; software is not loaded. Two specific cases are when 87.LIB
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; is linked in but no coprocessor is present, and when floating
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; point i/o conversions are done, but no floating-point variables
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; or expressions are used in the program.
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;
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;*******************************************************************************
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?DF= 1 ; this is special for c startup
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include version.inc
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.xlist
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include cmacros.inc
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.list
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createSeg _TEXT, code, word, public, CODE, <>
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createSeg _DATA, data, word, public, DATA, DGROUP
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createSeg HDR, nhdr, byte, public, MSG, DGROUP
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createSeg MSG, nmsg, byte, public, MSG, DGROUP
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createSeg PAD, npad, byte, common, MSG, DGROUP
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createSeg EPAD, nepad, byte, common, MSG, DGROUP
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defGrp DGROUP ; define DGROUP
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; Messages used by _fptrap
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sBegin nmsg
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assumes ds,data
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dw 2
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db 'R6002',13,10,'- floating point not loaded',13,10,0
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sEnd
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sBegin npad
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assumes ds,data
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dw -1
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; no padding for now;
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; MAX padding would be
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; db 22 dup(0)
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sEnd
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sBegin code
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assumes cs,code
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externNP _amsg_exit
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page
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;***
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;_fptrap - trap for missing floating-point software
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;
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;Purpose:
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; Catches these cases of incomplete f.p. software linked into a program.
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;
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; (1) 87.LIB chosen, but no coprocessor present;
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; (i.e., emulator not linked)
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;
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; (2) "%e", "%f", and "%g" i/o conversion formats specified, but
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; not all conversion software has been linked in, because the
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; program did not use any floating-point variables or expressions.
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;
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;Entry:
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; None.
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;
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;Exit:
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; None.
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;
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;Uses:
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; AX.
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;
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;Exceptions:
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; Transfers control to _amsg_exit which ...
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; - Writes error message to standard error: "floating point not loaded";
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; - Terminates the program by calling _exit().
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;*******************************************************************************
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labelNP <PUBLIC,_fptrap>
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mov ax,2 ; issue floating point not loaded
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jmp _amsg_exit ; and die
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sEnd code
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end
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