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- // SPDX-License-Identifier: Apache-2.0
- // SPDX-FileCopyrightText: 2026 The Ebitengine Authors
- //go:build !cgo && (freebsd || linux)
- #include "textflag.h"
- #include "go_asm.h"
- // These trampolines map the gcc ABI to Go ABI0 and then call into the Go equivalent functions.
- // On ARM32, Go ABI0 uses stack-based calling convention.
- // Arguments are placed on the stack starting at 4(SP) after the prologue.
- TEXT x_cgo_init_trampoline(SB), NOSPLIT, $8-0
- MOVW R0, 4(R13)
- MOVW R1, 8(R13)
- MOVW ·x_cgo_init_call(SB), R12
- MOVW (R12), R12
- CALL (R12)
- RET
- TEXT x_cgo_thread_start_trampoline(SB), NOSPLIT, $8-0
- MOVW R0, 4(R13)
- MOVW ·x_cgo_thread_start_call(SB), R12
- MOVW (R12), R12
- CALL (R12)
- RET
- TEXT x_cgo_setenv_trampoline(SB), NOSPLIT, $8-0
- MOVW R0, 4(R13)
- MOVW ·x_cgo_setenv_call(SB), R12
- MOVW (R12), R12
- CALL (R12)
- RET
- TEXT x_cgo_unsetenv_trampoline(SB), NOSPLIT, $8-0
- MOVW R0, 4(R13)
- MOVW ·x_cgo_unsetenv_call(SB), R12
- MOVW (R12), R12
- CALL (R12)
- RET
- TEXT x_cgo_notify_runtime_init_done_trampoline(SB), NOSPLIT, $0-0
- 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, $0-8
- MOVW G+4(FP), R0
- MOVW setg+0(FP), R12
- BL (R12)
- RET
- TEXT threadentry_trampoline(SB), NOSPLIT, $8-0
- // See crosscall2.
- MOVW R0, 4(R13)
- MOVW ·threadentry_call(SB), R12
- MOVW (R12), R12
- CALL (R12)
- RET
- TEXT ·call5(SB), NOSPLIT, $8-28
- MOVW fn+0(FP), R12
- MOVW a1+4(FP), R0
- MOVW a2+8(FP), R1
- MOVW a3+12(FP), R2
- MOVW a4+16(FP), R3
- MOVW a5+20(FP), R4
- // Store 5th arg below SP (in local frame area)
- MOVW R4, arg5-8(SP)
- // Align SP to 8 bytes for call (required by ARM AAPCS)
- SUB $8, R13
- CALL (R12)
- ADD $8, R13
- MOVW R0, r1+24(FP)
- RET
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