// 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 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)

// 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)

// 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 AMD64, Darwin
//

// Trap # in AX, args in DI SI DX, return in AX DX

// func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno);
TEXT	·Syscall(SB),NOSPLIT,$0-56

// Copyright 2013 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 ARM, NetBSD
//

// func Syscall(trap int32, a1, a2, a3 int32) (r1, r2, err int32);
// func Syscall6(trap int32, a1, a2, a3, a4, a5, a6 int32) (r1, r2, err int32);

//
// Do not remove or change the type signature.
// See go.dev/issue/67401.
//
//go:linkname newInlineUnwinder
func newInlineUnwinder(f funcInfo, pc uintptr) (inlineUnwinder, inlineFrame) {
	inldata := funcdata(f, abi.FUNCDATA_InlTree)
	if inldata == nil {
		return inlineUnwinder{f: f}, inlineFrame{pc: pc, index: -1}
	}
	inlTree := (*[1 << 20]inlinedCall)(inldata)
	u := inlineUnwinder{f: f, inlTree: inlTree}

// 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"

#define SYS_ERRSTR 41	/* from zsysnum_plan9.go */
#define SYS_SEEK 39	/* from zsysnum_plan9.go */

// System call support for plan9 on arm

//func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err ErrorString)

// Copyright 2015 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 "go_asm.h"
#include "textflag.h"
#include "funcdata.h"

// bool armcas(int32 *val, int32 old, int32 new)
// Atomically:
//	if(*val == old){
//		*val = new;
//		return 1;
//	}else
//		return 0;
//
// To implement ·cas in sys_$GOOS_arm.s

}

// funcdata returns a pointer to the ith funcdata for f.
// funcdata should be kept in sync with cmd/link:writeFuncs.
func funcdata(f funcInfo, i uint8) unsafe.Pointer {
	if i < 0 || i >= f.nfuncdata {
		return nil
	}
	base := f.datap.gofunc // load gofunc address early so that we calculate during cache misses

	//
	// pcdata [npcdata]uint32

	// funcdata contains the offset past moduledata.gofunc which contains a
	// pointer to that index's funcdata. e.g.,
	// *(moduledata.gofunc +  _func.funcdata[_FUNCDATA_ArgsPointerMaps]) is
	// the argument pointer map.
	//
	// An offset of ^uint32(0) indicates that there is no entry.
	//
	// funcdata [nfuncdata]uint32
}

// Copyright 2015 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"

// bool Cas(int32 *val, int32 old, int32 new)
// Atomically:
//	if(*val == old){
//		*val = new;
//		return 1;
//	}else
//		return 0;
TEXT ·Cas(SB), NOSPLIT, $0-13
	MOVL	ptr+0(FP), BX
	MOVL	old+4(FP), AX
	MOVL	new+8(FP), CX