vendor dependencies, make some changes to how input is done

2026-06-15 18:54:00 +02:00
parent 535130933c
commit 4800eb28d9
759 changed files with 360941 additions and 30 deletions
@@ -0,0 +1,104 @@
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: 2022 The Ebitengine Authors
+
+//go:build darwin || linux || freebsd
+
+/*
+trampoline for emulating required C functions for cgo in go (see cgo.go)
+(we convert cdecl calling convention to go and vice-versa)
+
+Since we're called from go and call into C we can cheat a bit with the calling conventions:
+ - in go all the registers are caller saved
+ - in C we have a couple of callee saved registers
+
+=> we can use BX, R12, R13, R14, R15 instead of the stack
+
+C Calling convention cdecl used here (we only need integer args):
+1. arg: DI
+2. arg: SI
+3. arg: DX
+4. arg: CX
+5. arg: R8
+6. arg: R9
+We don't need floats with these functions -> AX=0
+return value will be in AX
+*/
+#include "textflag.h"
+#include "go_asm.h"
+
+// these trampolines map the gcc ABI to Go ABI and then calls into the Go equivalent functions.
+
+TEXT x_cgo_init_trampoline(SB), NOSPLIT, $16
+	MOVQ DI, AX
+	MOVQ SI, BX
+	MOVQ ·x_cgo_init_call(SB), DX
+	MOVQ (DX), CX
+	CALL CX
+	RET
+
+TEXT x_cgo_thread_start_trampoline(SB), NOSPLIT, $8
+	MOVQ DI, AX
+	MOVQ ·x_cgo_thread_start_call(SB), DX
+	MOVQ (DX), CX
+	CALL CX
+	RET
+
+TEXT x_cgo_setenv_trampoline(SB), NOSPLIT, $8
+	MOVQ DI, AX
+	MOVQ ·x_cgo_setenv_call(SB), DX
+	MOVQ (DX), CX
+	CALL CX
+	RET
+
+TEXT x_cgo_unsetenv_trampoline(SB), NOSPLIT, $8
+	MOVQ DI, AX
+	MOVQ ·x_cgo_unsetenv_call(SB), DX
+	MOVQ (DX), CX
+	CALL CX
+	RET
+
+TEXT x_cgo_notify_runtime_init_done_trampoline(SB), NOSPLIT, $0
+	CALL ·x_cgo_notify_runtime_init_done(SB)
+	RET
+
+TEXT x_cgo_bindm_trampoline(SB), NOSPLIT, $0
+	CALL ·x_cgo_bindm(SB)
+	RET
+
+// func setg_trampoline(setg uintptr, g uintptr)
+TEXT ·setg_trampoline(SB), NOSPLIT, $0-16
+	MOVQ G+8(FP), DI
+	MOVQ setg+0(FP), BX
+	XORL AX, AX
+	CALL BX
+	RET
+
+TEXT threadentry_trampoline(SB), NOSPLIT, $16
+	MOVQ DI, AX
+	MOVQ ·threadentry_call(SB), DX
+	MOVQ (DX), CX
+	CALL CX
+	RET
+
+TEXT ·call5(SB), NOSPLIT, $0-56
+	MOVQ fn+0(FP), BX
+	MOVQ a1+8(FP), DI
+	MOVQ a2+16(FP), SI
+	MOVQ a3+24(FP), DX
+	MOVQ a4+32(FP), CX
+	MOVQ a5+40(FP), R8
+
+	XORL AX, AX // no floats
+
+	PUSHQ BP       // save BP
+	MOVQ  SP, BP   // save SP inside BP bc BP is callee-saved
+	SUBQ  $16, SP  // allocate space for alignment
+	ANDQ  $-16, SP // align on 16 bytes for SSE
+
+	CALL BX
+
+	MOVQ BP, SP // get SP back
+	POPQ BP     // restore BP
+
+	MOVQ AX, ret+48(FP)
+	RET