campo-sirio/zip/unzip/acorn/swiven.s

; SWI veneers used by Zip/Unzip
;

r0		RN	0
r1		RN	1
r2		RN	2
r3		RN	3
r4		RN	4
r5		RN	5
r6		RN	6
r7		RN	7
r8		RN	8
r9		RN	9
r10		RN	10
r11		RN	11
r12		RN	12
sp		RN	13
lr		RN	14
pc		RN	15

sl		RN	10
fp		RN	11
ip		RN	12


XOS_Bit				EQU &020000

OS_GBPB				EQU &00000C
OS_File				EQU &000008
OS_FSControl			EQU &000029
OS_CLI				EQU &000005
OS_ReadC			EQU &000004
OS_ReadVarVal			EQU &000023
DDEUtils_Prefix			EQU &042580
Territory_ReadCurrentTimeZone	EQU &043048

	MACRO
	STARTCODE $name
	EXPORT $name
$name
	MEND


		AREA	|C$$code|, CODE, READONLY

; os_error *SWI_OS_FSControl_26(char *source, char *dest, int actionmask);

	STARTCODE SWI_OS_FSControl_26

	MOV	ip, lr

	MOV	r3, r2
	MOV	r2, r1
	MOV	r1, r0
	MOV	r0, #26

	SWI	OS_FSControl + XOS_Bit

	MOVVC	r0, #0

	MOVS	pc, ip


; os_error *SWI_OS_FSControl_27(char *filename, int actionmask);

	STARTCODE SWI_OS_FSControl_27

	MOV	ip, lr

	MOV	r3, r1
	MOV	r1, r0
	MOV	r0, #27

	SWI	OS_FSControl + XOS_Bit

	MOVVC	r0, #0

	MOVS	pc, ip


; os_error *SWI_OS_GBPB_9(char *dirname, void *buf, int *number,
;			  int *offset, int size, char *match);

	STARTCODE SWI_OS_GBPB_9

	MOV	ip, sp
	STMFD	sp!, {r2-r6,lr}
	LDMIA	ip, {r5,r6}
	LDR	r4, [r3]
	LDR	r3, [r2]
	MOV	r2, r1
	MOV	r1, r0
	MOV	r0, #9
	SWI	OS_GBPB + XOS_Bit
	LDMVSFD sp!, {r2-r6,pc}^
	MOV	r0, #0
	LDMFD	sp, {r5,r6}
	STR	r3, [r5]
	STR	r4, [r6]
	LDMFD	sp!, {r2-r6,pc}^


; os_error *SWI_OS_File_1(char *filename, int loadaddr, int execaddr, int attrib);

	STARTCODE SWI_OS_File_1

	STMFD	sp!, {r5,lr}
	MOV	r5, r3
	MOV	r3, r2
	MOV	r2, r1
	MOV	r1, r0
	MOV	r0, #1
	SWI	OS_File + XOS_Bit
	MOVVC	r0, #0
	LDMFD	sp!, {r5,pc}^



; os_error *SWI_OS_File_5(char *filename, int *objtype, int *loadaddr,
;			  int *execaddr, int *length, int *attrib);

	STARTCODE SWI_OS_File_5

	STMFD	sp!, {r1-r5,lr}
	MOV	r1, r0
	MOV	r0, #5
	SWI	OS_File + XOS_Bit
	LDMVSFD sp!, {r1-r5,pc}^
	LDR	lr, [sp]
	TEQ	lr, #0
	STRNE	r0, [lr]
	LDR	lr, [sp, #4]
	TEQ	lr ,#0
	STRNE	r2, [lr]
	LDR	lr, [sp, #8]
	TEQ	lr, #0
	STRNE	r3, [lr]
	LDR	lr, [sp ,#24]
	TEQ	lr, #0
	STRNE	r4, [lr]
	LDR	lr, [sp ,#28]
	TEQ	lr, #0
	STRNE	r5, [lr]
	MOV	r0, #0
	LDMFD	sp!, {r1-r5,pc}^


; os_error *SWI_OS_File_6(char *filename);

	STARTCODE SWI_OS_File_6

	STMFD	sp!, {r4-r5,lr}
	MOV	r1, r0
	MOV	r0, #6
	SWI	OS_File + XOS_Bit
	MOVVC	r0, #0
	LDMFD	sp!, {r4-r5,pc}^


; os_error *SWI_OS_File_7(char *filename, int loadaddr, int execaddr, int size);

	STARTCODE SWI_OS_File_7

	STMFD	sp!, {r4-r5,lr}
	MOV	r5, r3
	MOV	r4, #0
	MOV	r3, r2
	MOV	r2, r1
	MOV	r1, r0
	MOV	r0, #7
	SWI	OS_File + XOS_Bit
	MOVVC	r0, #0
	LDMFD	sp!, {r4-r5,pc}^


; os_error *SWI_OS_File_8(char *dirname);

	STARTCODE SWI_OS_File_8

	STMFD	sp!, {r4,lr}
	MOV	r1, r0
	MOV	r4, #0
	MOV	r0, #8
	SWI	OS_File + XOS_Bit
	MOVVC	r0, #0
	LDMFD	sp!, {r4,pc}^


; os_error *SWI_OS_CLI(char *cmd);

	STARTCODE SWI_OS_CLI

	MOV	ip, lr
	SWI	OS_CLI + XOS_Bit
	MOVVC	r0, #0
	MOVS	pc, ip


; int SWI_OS_ReadC(void);

	STARTCODE SWI_OS_ReadC

	MOV	ip, lr
	SWI	OS_ReadC + XOS_Bit
	MOVS	pc, ip


; os_error *SWI_OS_ReadVarVal(char *var, char *buf, int len, int *bytesused);

	STARTCODE SWI_OS_ReadVarVal

	STMFD	sp!, {r4,lr}
	MOV	ip, r3
	MOV	r3, #0
	MOV	r4, #0
	SWI	OS_ReadVarVal + XOS_Bit
	LDMVSFD	sp!, {r4,pc}^
	TEQ	ip, #0
	STRNE	r2, [ip]
	MOV	r0, #0
	LDMFD	sp!, {r4,pc}^


; os_error *SWI_OS_FSControl_54(char *buffer, int dir, char *fsname, int *size);

	STARTCODE SWI_OS_FSControl_54

	STMFD	sp!, {r3-r6,lr}
	LDR	r5, [r3]
	MOV	r3, r2
	MOV	r2, r1
	MOV	r1, r0
	MOV	r0, #54
	SWI	OS_FSControl + XOS_Bit
	LDMVSFD sp!, {r3-r6,pc}^
	MOV	r0, #0
	LDMFD	sp!, {r3}
	STR	r5, [r3]
	LDMFD	sp!, {r4-r6,pc}^


; os_error *SWI_OS_FSControl_37(char *pathname, char *buffer, int *size);

	STARTCODE SWI_OS_FSControl_37

	STMFD	sp!, {r2,r3-r5,lr}
	LDR	r5, [r2]
	MOV	r3, #0
	MOV	r4, #0
	MOV	r2, r1
	MOV	r1, r0
	MOV	r0, #37
	SWI	OS_FSControl + XOS_Bit
	LDMVSFD sp!, {r2,r3-r5,pc}^
	MOV	r0, #0
	LDMFD	sp!, {r2}
	STR	r5, [r2]
	LDMFD	sp!, {r3-r5,pc}^


; os_error *SWI_DDEUtils_Prefix(char *dir);

	STARTCODE SWI_DDEUtils_Prefix

	MOV	ip, lr
	SWI	DDEUtils_Prefix + XOS_Bit
	MOVVC	r0, #0
	MOVS	pc, ip

; int SWI_Read_Timezone(void);

	STARTCODE SWI_Read_Timezone

	MOV	ip, lr
	SWI	Territory_ReadCurrentTimeZone + XOS_Bit
	MOVVC	r0, r1
	MOVVS	r0, #0
	MOVS	pc, ip


	END