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- // SPDX-License-Identifier: Apache-2.0
- // SPDX-FileCopyrightText: 2022 The Ebitengine Authors
- //go:build darwin || freebsd || linux || windows
- #include "textflag.h"
- #include "go_asm.h"
- #include "funcdata.h"
- #define STACK_SIZE 64
- #define PTR_ADDRESS (STACK_SIZE - 8)
- // syscall15X calls a function in libc on behalf of the syscall package.
- // syscall15X takes a pointer to a struct like:
- // struct {
- // fn uintptr
- // a1 uintptr
- // a2 uintptr
- // a3 uintptr
- // a4 uintptr
- // a5 uintptr
- // a6 uintptr
- // a7 uintptr
- // a8 uintptr
- // a9 uintptr
- // a10 uintptr
- // a11 uintptr
- // a12 uintptr
- // a13 uintptr
- // a14 uintptr
- // a15 uintptr
- // r1 uintptr
- // r2 uintptr
- // err uintptr
- // }
- // syscall15X must be called on the g0 stack with the
- // C calling convention (use libcCall).
- GLOBL ·syscall15XABI0(SB), NOPTR|RODATA, $8
- DATA ·syscall15XABI0(SB)/8, $syscall15X(SB)
- TEXT syscall15X(SB), NOSPLIT, $0
- SUB $STACK_SIZE, RSP // push structure pointer
- MOVD R0, PTR_ADDRESS(RSP)
- MOVD R0, R9
- FMOVD syscall15Args_f1(R9), F0 // f1
- FMOVD syscall15Args_f2(R9), F1 // f2
- FMOVD syscall15Args_f3(R9), F2 // f3
- FMOVD syscall15Args_f4(R9), F3 // f4
- FMOVD syscall15Args_f5(R9), F4 // f5
- FMOVD syscall15Args_f6(R9), F5 // f6
- FMOVD syscall15Args_f7(R9), F6 // f7
- FMOVD syscall15Args_f8(R9), F7 // f8
- MOVD syscall15Args_a1(R9), R0 // a1
- MOVD syscall15Args_a2(R9), R1 // a2
- MOVD syscall15Args_a3(R9), R2 // a3
- MOVD syscall15Args_a4(R9), R3 // a4
- MOVD syscall15Args_a5(R9), R4 // a5
- MOVD syscall15Args_a6(R9), R5 // a6
- MOVD syscall15Args_a7(R9), R6 // a7
- MOVD syscall15Args_a8(R9), R7 // a8
- MOVD syscall15Args_arm64_r8(R9), R8 // r8
- MOVD syscall15Args_a9(R9), R10
- MOVD R10, 0(RSP) // push a9 onto stack
- MOVD syscall15Args_a10(R9), R10
- MOVD R10, 8(RSP) // push a10 onto stack
- MOVD syscall15Args_a11(R9), R10
- MOVD R10, 16(RSP) // push a11 onto stack
- MOVD syscall15Args_a12(R9), R10
- MOVD R10, 24(RSP) // push a12 onto stack
- MOVD syscall15Args_a13(R9), R10
- MOVD R10, 32(RSP) // push a13 onto stack
- MOVD syscall15Args_a14(R9), R10
- MOVD R10, 40(RSP) // push a14 onto stack
- MOVD syscall15Args_a15(R9), R10
- MOVD R10, 48(RSP) // push a15 onto stack
- MOVD syscall15Args_fn(R9), R10 // fn
- BL (R10)
- MOVD PTR_ADDRESS(RSP), R2 // pop structure pointer
- ADD $STACK_SIZE, RSP
- MOVD R0, syscall15Args_a1(R2) // save r1
- MOVD R1, syscall15Args_a2(R2) // save r3
- FMOVD F0, syscall15Args_f1(R2) // save f0
- FMOVD F1, syscall15Args_f2(R2) // save f1
- FMOVD F2, syscall15Args_f3(R2) // save f2
- FMOVD F3, syscall15Args_f4(R2) // save f3
- RET
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