mirror of https://github.com/golang/go.git
runtime/cgo: add linux/mips64x cgo support
MIPS N64 ABI passes arguments in registers R4-R11, return value in R2. R16-R23, R28, R30 and F24-F31 are callee-save. gcc PIC code expects to be called with indirect call through R25. Change-Id: I24f582b4b58e1891ba9fd606509990f95cca8051 Reviewed-on: https://go-review.googlesource.com/19805 Reviewed-by: Minux Ma <minux@golang.org>
This commit is contained in:
Cherry Zhang
Minux Ma
parent
073d292c45
commit
5d002dbc21
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@ -0,0 +1,74 @@
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// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build mips64 mips64le
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#include "textflag.h"
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/*
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* void crosscall2(void (*fn)(void*, int32), void*, int32)
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* Save registers and call fn with two arguments.
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*/
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TEXT crosscall2(SB),NOSPLIT,$-8
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/*
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* We still need to save all callee save register as before, and then
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* push 2 args for fn (R5 and R6).
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* Also note that at procedure entry in gc world, 8(R29) will be the
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* first arg.
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*/
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ADDV $(-8*22), R29
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MOVV R5, (8*1)(R29)
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MOVV R6, (8*2)(R29)
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MOVV R16, (8*3)(R29)
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MOVV R17, (8*4)(R29)
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MOVV R18, (8*5)(R29)
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MOVV R19, (8*6)(R29)
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MOVV R20, (8*7)(R29)
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MOVV R21, (8*8)(R29)
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MOVV R22, (8*9)(R29)
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MOVV R23, (8*10)(R29)
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MOVV RSB, (8*11)(R29)
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MOVV g, (8*12)(R29)
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MOVV R31, (8*13)(R29)
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MOVD F24, (8*14)(R29)
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MOVD F25, (8*15)(R29)
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MOVD F26, (8*16)(R29)
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MOVD F27, (8*17)(R29)
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MOVD F28, (8*18)(R29)
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MOVD F29, (8*19)(R29)
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MOVD F30, (8*20)(R29)
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MOVD F31, (8*21)(R29)
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// Initialize Go ABI environment
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// prepare SB register = PC & 0xffffffff00000000
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BGEZAL R0, 1(PC)
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SRLV $32, R31, RSB
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SLLV $32, RSB
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JAL runtime·reginit(SB)
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JAL runtime·load_g(SB)
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JAL (R4)
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MOVV (8*1)(R29), R5
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MOVV (8*2)(R29), R6
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MOVV (8*3)(R29), R16
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MOVV (8*4)(R29), R17
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MOVV (8*5)(R29), R18
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MOVV (8*6)(R29), R19
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MOVV (8*7)(R29), R20
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MOVV (8*8)(R29), R21
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MOVV (8*9)(R29), R22
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MOVV (8*10)(R29), R23
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MOVV (8*11)(R29), RSB
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MOVV (8*12)(R29), g
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MOVV (8*13)(R29), R31
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MOVD (8*14)(R29), F24
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MOVD (8*15)(R29), F25
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MOVD (8*16)(R29), F26
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MOVD (8*17)(R29), F27
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MOVD (8*18)(R29), F28
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MOVD (8*19)(R29), F29
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MOVD (8*20)(R29), F30
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MOVD (8*21)(R29), F31
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ADDV $(8*22), R29
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RET
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@ -0,0 +1,77 @@
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// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build cgo
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// +build linux
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// +build mips64 mips64le
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#include <pthread.h>
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#include <string.h>
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#include <signal.h>
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#include "libcgo.h"
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static void *threadentry(void*);
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void (*x_cgo_inittls)(void **tlsg, void **tlsbase);
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void (*setg_gcc)(void*);
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void
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_cgo_sys_thread_start(ThreadStart *ts)
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{
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pthread_attr_t attr;
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sigset_t ign, oset;
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pthread_t p;
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size_t size;
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int err;
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sigfillset(&ign);
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pthread_sigmask(SIG_SETMASK, &ign, &oset);
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// Not sure why the memset is necessary here,
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// but without it, we get a bogus stack size
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// out of pthread_attr_getstacksize. C'est la Linux.
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memset(&attr, 0, sizeof attr);
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pthread_attr_init(&attr);
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size = 0;
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pthread_attr_getstacksize(&attr, &size);
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// Leave stacklo=0 and set stackhi=size; mstack will do the rest.
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ts->g->stackhi = size;
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err = pthread_create(&p, &attr, threadentry, ts);
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pthread_sigmask(SIG_SETMASK, &oset, nil);
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if (err != 0) {
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fatalf("pthread_create failed: %s", strerror(err));
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}
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}
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extern void crosscall1(void (*fn)(void), void (*setg_gcc)(void*), void *g);
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static void*
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threadentry(void *v)
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{
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ThreadStart ts;
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ts = *(ThreadStart*)v;
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free(v);
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crosscall1(ts.fn, setg_gcc, (void*)ts.g);
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return nil;
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}
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void
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x_cgo_init(G *g, void (*setg)(void*), void **tlsg, void **tlsbase)
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{
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pthread_attr_t attr;
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size_t size;
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setg_gcc = setg;
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pthread_attr_init(&attr);
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pthread_attr_getstacksize(&attr, &size);
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g->stacklo = (uintptr)&attr - size + 4096;
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pthread_attr_destroy(&attr);
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if (x_cgo_inittls) {
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x_cgo_inittls(tlsg, tlsbase);
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}
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}
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@ -0,0 +1,79 @@
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// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build mips64 mips64le
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/*
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* void crosscall1(void (*fn)(void), void (*setg_gcc)(void *g), void *g)
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*
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* Calling into the gc tool chain, where all registers are caller save.
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* Called from standard MIPS N64 ABI, where $16-$23, $28, $30, and $f24-$f31
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* are callee-save, so they must be saved explicitly, along with $31 (LR).
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*/
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.globl crosscall1
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.set noat
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crosscall1:
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daddiu $29, $29, -160
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sd $31, 0($29)
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sd $16, 8($29)
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sd $17, 16($29)
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sd $18, 24($29)
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sd $19, 32($29)
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sd $20, 40($29)
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sd $21, 48($29)
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sd $22, 56($29)
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sd $23, 64($29)
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sd $28, 72($29)
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sd $30, 80($29)
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sdc1 $f24, 88($29)
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sdc1 $f25, 96($29)
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sdc1 $f26, 104($29)
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sdc1 $f27, 112($29)
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sdc1 $f28, 120($29)
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sdc1 $f29, 128($29)
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sdc1 $f30, 136($29)
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sdc1 $f31, 144($29)
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dla $23,_cgo_reginit
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// prepare SB register = pc & 0xffffffff00000000
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bal 1f
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1:
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dsrl $28, $31, 32
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dsll $28, $28, 32
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move $20, $4 // save R4
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jalr $23 // call _cgo_reginit, set up Go ABI constant registers
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move $1, $6
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jalr $5 // call setg_gcc (clobbers R4)
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jalr $20 // call fn
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ld $16, 8($29)
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ld $17, 16($29)
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ld $18, 24($29)
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ld $19, 32($29)
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ld $20, 40($29)
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ld $21, 48($29)
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ld $22, 56($29)
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ld $23, 64($29)
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ld $28, 72($29)
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ld $30, 80($29)
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ldc1 $f24, 88($29)
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ldc1 $f25, 96($29)
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ldc1 $f26, 104($29)
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ldc1 $f27, 112($29)
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ldc1 $f28, 120($29)
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ldc1 $f29, 128($29)
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ldc1 $f30, 136($29)
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ldc1 $f31, 144($29)
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ld $31, 0($29)
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daddiu $29, $29, 160
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jr $31
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.set at
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#ifdef __ELF__
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.section .note.GNU-stack,"",%progbits
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#endif
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