From: Xiaodong Liu Date: Thu, 19 May 2022 12:01:10 +0000 (+0800) Subject: runtime/cgo: add cgo function call support for loong64 X-Git-Tag: go1.19beta1~162 X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=34507e879d31d082eeb5f5722c6c2aceaeb7e052;p=gostls13.git runtime/cgo: add cgo function call support for loong64 Contributors to the loong64 port are: Weining Lu Lei Wang Lingqin Gong Xiaolin Zhao Meidan Li Xiaojuan Zhai Qiyuan Pu Guoqi Chen This port has been updated to Go 1.15.6: https://github.com/loongson/go Updates #46229 Change-Id: I8ef0e7f17d6ada3d2f07c81524136b78457e7795 Reviewed-on: https://go-review.googlesource.com/c/go/+/342319 Run-TryBot: Ian Lance Taylor Auto-Submit: Ian Lance Taylor Run-TryBot: David Chase Reviewed-by: Ian Lance Taylor TryBot-Result: Gopher Robot Reviewed-by: David Chase --- diff --git a/src/runtime/cgo/asm_loong64.s b/src/runtime/cgo/asm_loong64.s new file mode 100644 index 0000000000..961a3dd484 --- /dev/null +++ b/src/runtime/cgo/asm_loong64.s @@ -0,0 +1,67 @@ +// Copyright 2022 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +#include "textflag.h" + +// Called by C code generated by cmd/cgo. +// func crosscall2(fn, a unsafe.Pointer, n int32, ctxt uintptr) +// Saves C callee-saved registers and calls cgocallback with three arguments. +// fn is the PC of a func(a unsafe.Pointer) function. +TEXT crosscall2(SB),NOSPLIT|NOFRAME,$0 + /* + * We still need to save all callee save register as before, and then + * push 3 args for fn (R4, R5, R7), skipping R6. + * Also note that at procedure entry in gc world, 8(R29) will be the + * first arg. + */ + + ADDV $(-8*22), R3 + MOVV R4, (8*1)(R3) // fn unsafe.Pointer + MOVV R5, (8*2)(R3) // a unsafe.Pointer + MOVV R7, (8*3)(R3) // ctxt uintptr + MOVV R23, (8*4)(R3) + MOVV R24, (8*5)(R3) + MOVV R25, (8*6)(R3) + MOVV R26, (8*7)(R3) + MOVV R27, (8*8)(R3) + MOVV R28, (8*9)(R3) + MOVV R29, (8*10)(R3) + MOVV R30, (8*11)(R3) + MOVV g, (8*12)(R3) + MOVV R1, (8*13)(R3) + MOVD F24, (8*14)(R3) + MOVD F25, (8*15)(R3) + MOVD F26, (8*16)(R3) + MOVD F27, (8*17)(R3) + MOVD F28, (8*18)(R3) + MOVD F29, (8*19)(R3) + MOVD F30, (8*20)(R3) + MOVD F31, (8*21)(R3) + + // Initialize Go ABI environment + JAL runtime·load_g(SB) + + JAL runtime·cgocallback(SB) + + MOVV (8*4)(R3), R23 + MOVV (8*5)(R3), R24 + MOVV (8*6)(R3), R25 + MOVV (8*7)(R3), R26 + MOVV (8*8)(R3), R27 + MOVV (8*9)(R3), R28 + MOVV (8*10)(R3), R29 + MOVV (8*11)(R3), R30 + MOVV (8*12)(R3), g + MOVV (8*13)(R3), R1 + MOVD (8*14)(R3), F24 + MOVD (8*15)(R3), F25 + MOVD (8*16)(R3), F26 + MOVD (8*17)(R3), F27 + MOVD (8*18)(R3), F28 + MOVD (8*19)(R3), F29 + MOVD (8*20)(R3), F30 + MOVD (8*21)(R3), F31 + ADDV $(8*22), R3 + + RET diff --git a/src/runtime/cgo/gcc_linux_loong64.c b/src/runtime/cgo/gcc_linux_loong64.c new file mode 100644 index 0000000000..96a06eb960 --- /dev/null +++ b/src/runtime/cgo/gcc_linux_loong64.c @@ -0,0 +1,69 @@ +// Copyright 2022 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +#include +#include +#include +#include "libcgo.h" +#include "libcgo_unix.h" + +static void *threadentry(void*); + +void (*x_cgo_inittls)(void **tlsg, void **tlsbase); +static void (*setg_gcc)(void*); + +void +_cgo_sys_thread_start(ThreadStart *ts) +{ + pthread_attr_t attr; + sigset_t ign, oset; + pthread_t p; + size_t size; + int err; + + sigfillset(&ign); + pthread_sigmask(SIG_SETMASK, &ign, &oset); + + pthread_attr_init(&attr); + pthread_attr_getstacksize(&attr, &size); + // Leave stacklo=0 and set stackhi=size; mstart will do the rest. + ts->g->stackhi = size; + err = _cgo_try_pthread_create(&p, &attr, threadentry, ts); + + pthread_sigmask(SIG_SETMASK, &oset, nil); + + if (err != 0) { + fatalf("pthread_create failed: %s", strerror(err)); + } +} + +extern void crosscall1(void (*fn)(void), void (*setg_gcc)(void*), void *g); +static void* +threadentry(void *v) +{ + ThreadStart ts; + + ts = *(ThreadStart*)v; + free(v); + + crosscall1(ts.fn, setg_gcc, (void*)ts.g); + return nil; +} + +void +x_cgo_init(G *g, void (*setg)(void*), void **tlsg, void **tlsbase) +{ + pthread_attr_t attr; + size_t size; + + setg_gcc = setg; + pthread_attr_init(&attr); + pthread_attr_getstacksize(&attr, &size); + g->stacklo = (uintptr)&attr - size + 4096; + pthread_attr_destroy(&attr); + + if (x_cgo_inittls) { + x_cgo_inittls(tlsg, tlsbase); + } +} diff --git a/src/runtime/cgo/gcc_loong64.S b/src/runtime/cgo/gcc_loong64.S new file mode 100644 index 0000000000..100aa33cc2 --- /dev/null +++ b/src/runtime/cgo/gcc_loong64.S @@ -0,0 +1,65 @@ +// Copyright 2022 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +/* + * void crosscall1(void (*fn)(void), void (*setg_gcc)(void *g), void *g) + * + * Calling into the gc tool chain, where all registers are caller save. + * Called from standard lp64d ABI, where $r1, $r3, $r23-$r30, and $f24-$f31 + * are callee-save, so they must be saved explicitly, along with $r1 (LR). + */ +.globl crosscall1 +crosscall1: + addi.d $r3, $r3, -160 + st.d $r1, $r3, 0 + st.d $r23, $r3, 8 + st.d $r24, $r3, 16 + st.d $r25, $r3, 24 + st.d $r26, $r3, 32 + st.d $r27, $r3, 40 + st.d $r28, $r3, 48 + st.d $r29, $r3, 56 + st.d $r30, $r3, 64 + st.d $r2, $r3, 72 + st.d $r22, $r3, 80 + fst.d $f24, $r3, 88 + fst.d $f25, $r3, 96 + fst.d $f26, $r3, 104 + fst.d $f27, $r3, 112 + fst.d $f28, $r3, 120 + fst.d $f29, $r3, 128 + fst.d $f30, $r3, 136 + fst.d $f31, $r3, 144 + + move $r18, $r4 // save R4 + move $r19, $r6 + jirl $r1, $r5, 0 // call setg_gcc (clobbers R4) + jirl $r1, $r18, 0 // call fn + + ld.d $r23, $r3, 8 + ld.d $r24, $r3, 16 + ld.d $r25, $r3, 24 + ld.d $r26, $r3, 32 + ld.d $r27, $r3, 40 + ld.d $r28, $r3, 48 + ld.d $r29, $r3, 56 + ld.d $r30, $r3, 64 + ld.d $r2, $r3, 72 + ld.d $r22, $r3, 80 + fld.d $f24, $r3, 88 + fld.d $f25, $r3, 96 + fld.d $f26, $r3, 104 + fld.d $f27, $r3, 112 + fld.d $f28, $r3, 120 + fld.d $f29, $r3, 128 + fld.d $f30, $r3, 136 + fld.d $f31, $r3, 144 + ld.d $r1, $r3, 0 + addi.d $r3, $r3, 160 + jirl $r0, $r1, 0 + + +#ifdef __ELF__ +.section .note.GNU-stack,"",%progbits +#endif