/usr/share/z88dk/lib/z80_crt0.hdr is in z88dk-data 1.8.ds1-10.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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; Header file which contains all required variables from the
; startup that need to be exposed to individual C files
;
; Stick in this file any routines which are needed or implicitly
; implied by sccz80.
;
; This file is included by every module
; To handle multi module programs which use floating point
; routines in different modules, we have got rid of
; the conditional assembly around the float routines
;
; $Id: z80_crt0.hdr,v 1.6 2005/08/27 00:09:31 aralbrec Exp $
XREF base_graphics ; Address of graphics screen
XREF _cpfar2near ; Far->near conversion (z88)
XREF packintrout ; Process interrupt (z88 apps)
XREF l_dcal ; jp(hl)
XREF cleanup ; cleanup before program exit
LIB l_jphl ; another jp(hl)
LIB l_jpix ; jp(ix)
LIB l_jpiy ; jp(iy)
;------------------------------------
; Scopes for integer library routines
;------------------------------------
LIB l_getptr ;Get 3 byte pointer
LIB l_putptr ;Put 3 byte pointer
LIB l_gchar ;Get signed char
LIB l_sxt ;Sign extend char
LIB l_gint ;Get int
LIB l_gint_eq ;Get int and test == 0
LIB l_ghtonsint ;Get reverse order int
LIB l_pint ;Put int
LIB l_pint_eq ;Put int and test == 0
LIB l_pint_pop ;Put int and pop place address
LIB l_pint_ex ;Put int hl to addr de return addr in hl
LIB l_or ;Int logical or
LIB l_xor ;Int logical xor
LIB l_and ;Int logical and
LIB l_eq ;Int equality
LIB l_ne ;Int inequality
LIB l_gt ;Int signed >
LIB l_le ;Int signed <=
LIB l_ge ;Int signed >=
LIB l_lt ;Int signed <
LIB l_uge ;Int unsigned >=
LIB l_ult ;Int unsigned <
LIB l_ugt ;Int unsigned >
LIB l_ule ;Int unsigned <=
LIB l_cmp ;Int signed compare
LIB l_ucmp ;Int unsigned compare
LIB l_asr ;Int signed >>
LIB l_asr_u ;Int unsigned >>
LIB l_asl ;Int <<
LIB l_sub ;Int subtract
LIB l_neg ;Int negate
LIB l_com ;Int ~
LIB l_lneg ;Int logical negate
LIB l_bool ;Int boolean tetst
LIB l_cm_de ;
LIB l_cm_bc
LIB l_deneg
LIB l_bcneg
LIB l_case ;Integer case
LIB l_mult ;Integer *
LIB l_div ;Integer signed /
LIB l_div_u ;Integer unsigned /
;------------------
;Long functions now
;------------------
LIB lpush2 ;Push a long under the stack
LIB l_int2long_s ;Int->long signed conversion
LIB l_long2int_s ;Long->int signed conversion
LIB l_glong ;Get long
LIB l_long_add
LIB l_long_and
LIB l_long_asl
LIB l_long_asr
LIB l_long_aslo ;Long << shift in c
LIB l_long_asro ;Long >> shift in c (signed)
LIB l_long_bool
LIB l_long_cmp
LIB l_long_com
LIB l_long_eq
LIB l_long_ge
LIB l_long_gt
LIB l_long_le
LIB l_long_lneg
LIB l_long_lt
LIB l_long_ne
LIB l_long_neg
LIB l_long_or
LIB l_long_sub
LIB l_long_ucmp
LIB l_long_uge
LIB l_long_ugt
LIB l_long_ule
LIB l_long_ult
LIB l_long_xor
LIB l_plong
LIB l_inclong ;Increment long
LIB l_declong ;Decrement long
LIB l_long_div
LIB l_long_div_u
LIB l_long_mult
LIB l_long_asr_u ;Long unsigned >>
LIB l_long_asr_uo ;Long unsigned >> shift in c
LIB l_long_case
;--------------------------------------------------------------
; Floating point support routines, mostly in library
;--------------------------------------------------------------
LIB dadd
LIB ddiv
LIB dsub
LIB dmul
LIB dge
LIB dgt
LIB dleq
LIB dlt
LIB deq
LIB dne
LIB minusfa ;FA=-FA
LIB dswap ;Exchange FA with top of stack
LIB float ;Convert int to float
LIB ufloat ;unsigned int to float
LIB ifix ;Convert float to int
XREF dstore ;FA->(de)
XREF dload ;FA<-(hl)
XREF dldpsh ;(hl)->(stack)
XREF dpush ;FA->(stack)
XREF dpush2 ;FA->(stack under)
XREF fa ;may not be needed in this file
XREF extra ;dittot
XREF __atof2 ;string->fa convsersion
;--------------------------------------------------
; Routines for picking up variables from far memory
;--------------------------------------------------
LIB lp_gchar
LIB lp_gdoub
LIB lp_gint
LIB lp_glong
LIB lp_gptr
LIB lp_pchar
LIB lp_pdoub
LIB lp_pint
LIB lp_plong
LIB lp_pptr
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