Initial commit: Go 1.23 release state

src/syscall/asm_plan9_386.s

@@ -0,0 +1,178 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include "textflag.h"
+#include "funcdata.h"
+
+//
+// System call support for 386, Plan 9
+//
+
+//func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err string)
+//func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err string)
+//func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr)
+//func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
+
+#define SYS_ERRSTR 41	/* from zsysnum_plan9.go */
+
+// Trap # in AX, args on stack above caller pc.
+TEXT	·Syscall(SB),NOSPLIT,$148-32
+	NO_LOCAL_POINTERS
+	CALL	runtime·entersyscall(SB)
+	MOVL	trap+0(FP), AX	// syscall entry
+	// copy args down
+	LEAL	a1+4(FP), SI
+	LEAL	sysargs-144(SP), DI
+	CLD
+	MOVSL
+	MOVSL
+	MOVSL
+	INT	$64
+	MOVL	AX, r1+16(FP)
+	MOVL	$0, r2+20(FP)
+	CMPL	AX, $-1
+	JNE	ok3
+
+	LEAL	errbuf-128(SP), AX
+	MOVL	AX, sysargs-144(SP)
+	MOVL	$128, sysargs1-140(SP)
+	MOVL	$SYS_ERRSTR, AX
+	INT	$64
+	CALL	runtime·exitsyscall(SB)
+	MOVL	sysargs-144(SP), AX
+	MOVL	AX, errbuf-148(SP)
+	CALL	runtime·gostring(SB)
+	LEAL	str-144(SP), SI
+	JMP	copyresult3
+
+ok3:
+	CALL	runtime·exitsyscall(SB)
+	LEAL	·emptystring(SB), SI
+
+copyresult3:
+	LEAL	err+24(FP), DI
+
+	CLD
+	MOVSL
+	MOVSL
+
+	RET
+
+TEXT	·Syscall6(SB),NOSPLIT,$148-44
+	NO_LOCAL_POINTERS
+	CALL	runtime·entersyscall(SB)
+	MOVL	trap+0(FP), AX	// syscall entry
+	// copy args down
+	LEAL	a1+4(FP), SI
+	LEAL	sysargs-144(SP), DI
+	CLD
+	MOVSL
+	MOVSL
+	MOVSL
+	MOVSL
+	MOVSL
+	MOVSL
+	INT	$64
+	MOVL	AX, r1+28(FP)
+	MOVL	$0, r2+32(FP)
+	CMPL	AX, $-1
+	JNE	ok4
+
+	LEAL	errbuf-128(SP), AX
+	MOVL	AX, sysargs-144(SP)
+	MOVL	$128, sysargs1-140(SP)
+	MOVL	$SYS_ERRSTR, AX
+	INT	$64
+	CALL	runtime·exitsyscall(SB)
+	MOVL	sysargs-144(SP), AX
+	MOVL	AX, errbuf-148(SP)
+	CALL	runtime·gostring(SB)
+	LEAL	str-144(SP), SI
+	JMP	copyresult4
+
+ok4:
+	CALL	runtime·exitsyscall(SB)
+	LEAL	·emptystring(SB), SI
+
+copyresult4:
+	LEAL	err+36(FP), DI
+
+	CLD
+	MOVSL
+	MOVSL
+
+	RET
+
+TEXT ·RawSyscall(SB),NOSPLIT,$0-28
+	MOVL	trap+0(FP), AX	// syscall entry
+	// slide args down on top of system call number
+	LEAL	a1+4(FP), SI
+	LEAL	trap+0(FP), DI
+	CLD
+	MOVSL
+	MOVSL
+	MOVSL
+	INT	$64
+	MOVL	AX, r1+16(FP)
+	MOVL	AX, r2+20(FP)
+	MOVL	AX, err+24(FP)
+	RET
+
+TEXT	·RawSyscall6(SB),NOSPLIT,$0-40
+	MOVL	trap+0(FP), AX	// syscall entry
+	// slide args down on top of system call number
+	LEAL	a1+4(FP), SI
+	LEAL	trap+0(FP), DI
+	CLD
+	MOVSL
+	MOVSL
+	MOVSL
+	MOVSL
+	MOVSL
+	MOVSL
+	INT	$64
+	MOVL	AX, r1+28(FP)
+	MOVL	AX, r2+32(FP)
+	MOVL	AX, err+36(FP)
+	RET
+
+#define SYS_SEEK 39	/* from zsysnum_plan9.go */
+
+//func seek(placeholder uintptr, fd int, offset int64, whence int) (newoffset int64, err string)
+TEXT ·seek(SB),NOSPLIT,$24-36
+	NO_LOCAL_POINTERS
+	LEAL	newoffset+20(FP), AX
+	MOVL	AX, placeholder+0(FP)
+
+	// copy args down
+	LEAL	placeholder+0(FP), SI
+	LEAL	sysargs-20(SP), DI
+	CLD
+	MOVSL
+	MOVSL
+	MOVSL
+	MOVSL
+	MOVSL
+	MOVL	$SYS_SEEK, AX	// syscall entry
+	INT	$64
+
+	CMPL	AX, $-1
+	JNE	ok6
+	MOVL	AX, newoffset_lo+20(FP)
+	MOVL	AX, newoffset_hi+24(FP)
+
+	CALL	syscall·errstr(SB)
+	MOVL	SP, SI
+	JMP	copyresult6
+
+ok6:
+	LEAL	·emptystring(SB), SI
+
+copyresult6:
+	LEAL	err+28(FP), DI
+
+	CLD
+	MOVSL
+	MOVSL
+	RET