| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596 |
- // SPDX-License-Identifier: Apache-2.0
- // SPDX-FileCopyrightText: 2025 The Ebitengine Authors
- //go:build linux
- #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
- // push structure pointer
- SUBV $STACK_SIZE, R3
- MOVV R4, PTR_ADDRESS(R3)
- MOVV R4, R13
- MOVD syscall15Args_f1(R13), F0 // f1
- MOVD syscall15Args_f2(R13), F1 // f2
- MOVD syscall15Args_f3(R13), F2 // f3
- MOVD syscall15Args_f4(R13), F3 // f4
- MOVD syscall15Args_f5(R13), F4 // f5
- MOVD syscall15Args_f6(R13), F5 // f6
- MOVD syscall15Args_f7(R13), F6 // f7
- MOVD syscall15Args_f8(R13), F7 // f8
- MOVV syscall15Args_a1(R13), R4 // a1
- MOVV syscall15Args_a2(R13), R5 // a2
- MOVV syscall15Args_a3(R13), R6 // a3
- MOVV syscall15Args_a4(R13), R7 // a4
- MOVV syscall15Args_a5(R13), R8 // a5
- MOVV syscall15Args_a6(R13), R9 // a6
- MOVV syscall15Args_a7(R13), R10 // a7
- MOVV syscall15Args_a8(R13), R11 // a8
- // push a9-a15 onto stack
- MOVV syscall15Args_a9(R13), R12
- MOVV R12, 0(R3)
- MOVV syscall15Args_a10(R13), R12
- MOVV R12, 8(R3)
- MOVV syscall15Args_a11(R13), R12
- MOVV R12, 16(R3)
- MOVV syscall15Args_a12(R13), R12
- MOVV R12, 24(R3)
- MOVV syscall15Args_a13(R13), R12
- MOVV R12, 32(R3)
- MOVV syscall15Args_a14(R13), R12
- MOVV R12, 40(R3)
- MOVV syscall15Args_a15(R13), R12
- MOVV R12, 48(R3)
- MOVV syscall15Args_fn(R13), R12
- JAL (R12)
- // pop structure pointer
- MOVV PTR_ADDRESS(R3), R13
- ADDV $STACK_SIZE, R3
- // save R4, R5
- MOVV R4, syscall15Args_a1(R13)
- MOVV R5, syscall15Args_a2(R13)
- // save f0-f3
- MOVD F0, syscall15Args_f1(R13)
- MOVD F1, syscall15Args_f2(R13)
- MOVD F2, syscall15Args_f3(R13)
- MOVD F3, syscall15Args_f4(R13)
- RET
|
