1// SPDX-License-Identifier: Apache-2.0
2// SPDX-FileCopyrightText: 2026 The Ebitengine Authors
3
4//go:build !cgo && linux
5
6#include "textflag.h"
7#include "go_asm.h"
8#include "abi_riscv64.h"
9
10// these trampolines map the gcc ABI to Go ABI and then calls into the Go equivalent functions.
11// X5 is used as temporary register.
12
13TEXT x_cgo_init_trampoline(SB), NOSPLIT, $16
14 MOV ·x_cgo_init_call(SB), X5
15 MOV (X5), X5
16 CALL X5
17 RET
18
19TEXT x_cgo_thread_start_trampoline(SB), NOSPLIT, $8
20 MOV ·x_cgo_thread_start_call(SB), X5
21 MOV (X5), X5
22 CALL X5
23 RET
24
25TEXT x_cgo_setenv_trampoline(SB), NOSPLIT, $8
26 MOV ·x_cgo_setenv_call(SB), X5
27 MOV (X5), X5
28 CALL X5
29 RET
30
31TEXT x_cgo_unsetenv_trampoline(SB), NOSPLIT, $8
32 MOV ·x_cgo_unsetenv_call(SB), X5
33 MOV (X5), X5
34 CALL X5
35 RET
36
37TEXT x_cgo_notify_runtime_init_done_trampoline(SB), NOSPLIT, $0
38 CALL ·x_cgo_notify_runtime_init_done(SB)
39 RET
40
41TEXT x_cgo_bindm_trampoline(SB), NOSPLIT, $0
42 CALL ·x_cgo_bindm(SB)
43 RET
44
45// func setg_trampoline(setg uintptr, g uintptr)
46TEXT ·setg_trampoline(SB), NOSPLIT, $0
47 MOV gp+8(FP), X10
48 MOV setg+0(FP), X5
49 CALL X5
50 RET
51
52TEXT threadentry_trampoline(SB), NOSPLIT, $200
53 MOV X10, 8(SP)
54
55 SAVE_GPR(8*2)
56 SAVE_FPR(8*14)
57
58 MOV ·threadentry_call(SB), X5
59 MOV (X5), X5
60 CALL X5
61
62 RESTORE_GPR(8*2)
63 RESTORE_FPR(8*14)
64
65 RET
66
67TEXT ·call5(SB), NOSPLIT, $0-48
68 MOV fn+0(FP), X5
69 MOV a1+8(FP), X10
70 MOV a2+16(FP), X11
71 MOV a3+24(FP), X12
72 MOV a4+32(FP), X13
73 MOV a5+40(FP), X14
74 CALL X5
75 MOV X10, ret+48(FP)
76 RET