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runtime: implement runtime entry for linux/loong64
Contributors to the loong64 port are: Weining Lu <luweining@loongson.cn> Lei Wang <wanglei@loongson.cn> Lingqin Gong <gonglingqin@loongson.cn> Xiaolin Zhao <zhaoxiaolin@loongson.cn> Meidan Li <limeidan@loongson.cn> Xiaojuan Zhai <zhaixiaojuan@loongson.cn> Qiyuan Pu <puqiyuan@loongson.cn> Guoqi Chen <chenguoqi@loongson.cn> This port has been updated to Go 1.15.6: https://github.com/loongson/go Updates #46229 Change-Id: I252ecd0b13580c5e71723715023b1951985045f3 Reviewed-on: https://go-review.googlesource.com/c/go/+/342322 TryBot-Result: Gopher Robot <gobot@golang.org> Auto-Submit: Ian Lance Taylor <iant@google.com> Run-TryBot: Ian Lance Taylor <iant@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com> Reviewed-by: Michael Knyszek <mknyszek@google.com>
This commit is contained in:
Xiaodong Liu
Gopher Robot
parent
5370494577
commit
2a5ceaaa78
803
src/runtime/asm_loong64.s
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803
src/runtime/asm_loong64.s
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// Copyright 2022 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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#include "go_asm.h"
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#include "go_tls.h"
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#include "funcdata.h"
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#include "textflag.h"
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#define REGCTXT R29
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TEXT runtime·rt0_go(SB),NOSPLIT,$0
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// R3 = stack; R4 = argc; R5 = argv
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ADDV $-24, R3
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MOVW R4, 8(R3) // argc
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MOVV R5, 16(R3) // argv
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// create istack out of the given (operating system) stack.
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// _cgo_init may update stackguard.
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MOVV $runtime·g0(SB), g
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MOVV $(-64*1024), R30
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ADDV R30, R3, R19
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MOVV R19, g_stackguard0(g)
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MOVV R19, g_stackguard1(g)
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MOVV R19, (g_stack+stack_lo)(g)
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MOVV R3, (g_stack+stack_hi)(g)
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// if there is a _cgo_init, call it using the gcc ABI.
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MOVV _cgo_init(SB), R25
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BEQ R25, nocgo
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MOVV R0, R7 // arg 3: not used
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MOVV R0, R6 // arg 2: not used
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MOVV $setg_gcc<>(SB), R5 // arg 1: setg
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MOVV g, R4 // arg 0: G
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JAL (R25)
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nocgo:
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// update stackguard after _cgo_init
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MOVV (g_stack+stack_lo)(g), R19
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ADDV $const__StackGuard, R19
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MOVV R19, g_stackguard0(g)
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MOVV R19, g_stackguard1(g)
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// set the per-goroutine and per-mach "registers"
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MOVV $runtime·m0(SB), R19
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// save m->g0 = g0
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MOVV g, m_g0(R19)
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// save m0 to g0->m
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MOVV R19, g_m(g)
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JAL runtime·check(SB)
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// args are already prepared
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JAL runtime·args(SB)
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JAL runtime·osinit(SB)
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JAL runtime·schedinit(SB)
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// create a new goroutine to start program
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MOVV $runtime·mainPC(SB), R19 // entry
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ADDV $-16, R3
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MOVV R19, 8(R3)
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MOVV R0, 0(R3)
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JAL runtime·newproc(SB)
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ADDV $16, R3
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// start this M
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JAL runtime·mstart(SB)
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MOVV R0, 1(R0)
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RET
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DATA runtime·mainPC+0(SB)/8,$runtime·main(SB)
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GLOBL runtime·mainPC(SB),RODATA,$8
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TEXT runtime·breakpoint(SB),NOSPLIT|NOFRAME,$0-0
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BREAK
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RET
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TEXT runtime·asminit(SB),NOSPLIT|NOFRAME,$0-0
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RET
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TEXT runtime·mstart(SB),NOSPLIT|TOPFRAME,$0
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JAL runtime·mstart0(SB)
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RET // not reached
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/*
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* go-routine
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*/
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// void gosave(Gobuf*)
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// save state in Gobuf; setjmp
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TEXT runtime·gosave(SB), NOSPLIT|NOFRAME, $0-8
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MOVV buf+0(FP), R19
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MOVV R3, gobuf_sp(R19)
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MOVV R1, gobuf_pc(R19)
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MOVV g, gobuf_g(R19)
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MOVV R0, gobuf_lr(R19)
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MOVV R0, gobuf_ret(R19)
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// Assert ctxt is zero. See func save.
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MOVV gobuf_ctxt(R19), R19
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BEQ R19, 2(PC)
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JAL runtime·badctxt(SB)
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RET
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// void gogo(Gobuf*)
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// restore state from Gobuf; longjmp
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TEXT runtime·gogo(SB), NOSPLIT, $16-8
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MOVV buf+0(FP), R4
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MOVV gobuf_g(R4), g // make sure g is not nil
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JAL runtime·save_g(SB)
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MOVV 0(g), R5
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MOVV gobuf_sp(R4), R3
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MOVV gobuf_lr(R4), R1
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MOVV gobuf_ret(R4), R19
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MOVV gobuf_ctxt(R4), REGCTXT
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MOVV R0, gobuf_sp(R4)
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MOVV R0, gobuf_ret(R4)
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MOVV R0, gobuf_lr(R4)
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MOVV R0, gobuf_ctxt(R4)
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MOVV gobuf_pc(R4), R6
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JMP (R6)
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// void mcall(fn func(*g))
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// Switch to m->g0's stack, call fn(g).
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// Fn must never return. It should gogo(&g->sched)
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// to keep running g.
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TEXT runtime·mcall(SB), NOSPLIT|NOFRAME, $0-8
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// Save caller state in g->sched
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MOVV R3, (g_sched+gobuf_sp)(g)
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MOVV R1, (g_sched+gobuf_pc)(g)
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MOVV R0, (g_sched+gobuf_lr)(g)
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MOVV g, (g_sched+gobuf_g)(g)
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// Switch to m->g0 & its stack, call fn.
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MOVV g, R19
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MOVV g_m(g), R4
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MOVV m_g0(R4), g
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JAL runtime·save_g(SB)
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BNE g, R19, 2(PC)
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JMP runtime·badmcall(SB)
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MOVV fn+0(FP), REGCTXT // context
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MOVV 0(REGCTXT), R5 // code pointer
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MOVV (g_sched+gobuf_sp)(g), R3 // sp = m->g0->sched.sp
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ADDV $-16, R3
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MOVV R19, 8(R3)
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MOVV R0, 0(R3)
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JAL (R5)
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JMP runtime·badmcall2(SB)
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// systemstack_switch is a dummy routine that systemstack leaves at the bottom
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// of the G stack. We need to distinguish the routine that
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// lives at the bottom of the G stack from the one that lives
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// at the top of the system stack because the one at the top of
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// the system stack terminates the stack walk (see topofstack()).
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TEXT runtime·systemstack_switch(SB), NOSPLIT, $0-0
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UNDEF
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JAL (R1) // make sure this function is not leaf
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RET
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// func systemstack(fn func())
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TEXT runtime·systemstack(SB), NOSPLIT, $0-8
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MOVV fn+0(FP), R19 // R19 = fn
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MOVV R19, REGCTXT // context
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MOVV g_m(g), R4 // R4 = m
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MOVV m_gsignal(R4), R5 // R5 = gsignal
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BEQ g, R5, noswitch
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MOVV m_g0(R4), R5 // R5 = g0
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BEQ g, R5, noswitch
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MOVV m_curg(R4), R6
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BEQ g, R6, switch
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// Bad: g is not gsignal, not g0, not curg. What is it?
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// Hide call from linker nosplit analysis.
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MOVV $runtime·badsystemstack(SB), R7
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JAL (R7)
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JAL runtime·abort(SB)
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switch:
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// save our state in g->sched. Pretend to
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// be systemstack_switch if the G stack is scanned.
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JAL gosave_systemstack_switch<>(SB)
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// switch to g0
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MOVV R5, g
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JAL runtime·save_g(SB)
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MOVV (g_sched+gobuf_sp)(g), R19
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// make it look like mstart called systemstack on g0, to stop traceback
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ADDV $-8, R19
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MOVV $runtime·mstart(SB), R6
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MOVV R6, 0(R19)
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MOVV R19, R3
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// call target function
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MOVV 0(REGCTXT), R6 // code pointer
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JAL (R6)
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// switch back to g
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MOVV g_m(g), R4
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MOVV m_curg(R4), g
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JAL runtime·save_g(SB)
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MOVV (g_sched+gobuf_sp)(g), R3
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MOVV R0, (g_sched+gobuf_sp)(g)
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RET
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noswitch:
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// already on m stack, just call directly
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// Using a tail call here cleans up tracebacks since we won't stop
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// at an intermediate systemstack.
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MOVV 0(REGCTXT), R4 // code pointer
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MOVV 0(R3), R1 // restore LR
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ADDV $8, R3
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JMP (R4)
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/*
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* support for morestack
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*/
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// Called during function prolog when more stack is needed.
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// Caller has already loaded:
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// loong64: R5: LR
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//
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// The traceback routines see morestack on a g0 as being
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// the top of a stack (for example, morestack calling newstack
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// calling the scheduler calling newm calling gc), so we must
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// record an argument size. For that purpose, it has no arguments.
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TEXT runtime·morestack(SB),NOSPLIT|NOFRAME,$0-0
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// Cannot grow scheduler stack (m->g0).
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MOVV g_m(g), R7
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MOVV m_g0(R7), R8
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BNE g, R8, 3(PC)
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JAL runtime·badmorestackg0(SB)
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JAL runtime·abort(SB)
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// Cannot grow signal stack (m->gsignal).
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MOVV m_gsignal(R7), R8
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BNE g, R8, 3(PC)
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JAL runtime·badmorestackgsignal(SB)
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JAL runtime·abort(SB)
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// Called from f.
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// Set g->sched to context in f.
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MOVV R3, (g_sched+gobuf_sp)(g)
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MOVV R1, (g_sched+gobuf_pc)(g)
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MOVV R5, (g_sched+gobuf_lr)(g)
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MOVV REGCTXT, (g_sched+gobuf_ctxt)(g)
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// Called from f.
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// Set m->morebuf to f's caller.
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MOVV R5, (m_morebuf+gobuf_pc)(R7) // f's caller's PC
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MOVV R3, (m_morebuf+gobuf_sp)(R7) // f's caller's SP
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MOVV g, (m_morebuf+gobuf_g)(R7)
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// Call newstack on m->g0's stack.
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MOVV m_g0(R7), g
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JAL runtime·save_g(SB)
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MOVV (g_sched+gobuf_sp)(g), R3
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// Create a stack frame on g0 to call newstack.
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MOVV R0, -8(R3) // Zero saved LR in frame
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ADDV $-8, R3
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JAL runtime·newstack(SB)
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// Not reached, but make sure the return PC from the call to newstack
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// is still in this function, and not the beginning of the next.
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UNDEF
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TEXT runtime·morestack_noctxt(SB),NOSPLIT|NOFRAME,$0-0
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MOVV R0, REGCTXT
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JMP runtime·morestack(SB)
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// reflectcall: call a function with the given argument list
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// func call(argtype *_type, f *FuncVal, arg *byte, argsize, retoffset uint32).
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// we don't have variable-sized frames, so we use a small number
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// of constant-sized-frame functions to encode a few bits of size in the pc.
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// Caution: ugly multiline assembly macros in your future!
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#define DISPATCH(NAME,MAXSIZE) \
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MOVV $MAXSIZE, R30; \
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SGTU R19, R30, R30; \
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BNE R30, 3(PC); \
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MOVV $NAME(SB), R4; \
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JMP (R4)
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// Note: can't just "BR NAME(SB)" - bad inlining results.
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TEXT ·reflectcall(SB), NOSPLIT|NOFRAME, $0-48
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MOVWU stackArgsSize+24(FP), R19
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DISPATCH(runtime·call32, 32)
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DISPATCH(runtime·call64, 64)
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DISPATCH(runtime·call128, 128)
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DISPATCH(runtime·call256, 256)
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DISPATCH(runtime·call512, 512)
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DISPATCH(runtime·call1024, 1024)
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DISPATCH(runtime·call2048, 2048)
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DISPATCH(runtime·call4096, 4096)
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DISPATCH(runtime·call8192, 8192)
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DISPATCH(runtime·call16384, 16384)
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DISPATCH(runtime·call32768, 32768)
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DISPATCH(runtime·call65536, 65536)
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DISPATCH(runtime·call131072, 131072)
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DISPATCH(runtime·call262144, 262144)
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DISPATCH(runtime·call524288, 524288)
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DISPATCH(runtime·call1048576, 1048576)
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DISPATCH(runtime·call2097152, 2097152)
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DISPATCH(runtime·call4194304, 4194304)
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DISPATCH(runtime·call8388608, 8388608)
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DISPATCH(runtime·call16777216, 16777216)
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DISPATCH(runtime·call33554432, 33554432)
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DISPATCH(runtime·call67108864, 67108864)
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DISPATCH(runtime·call134217728, 134217728)
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DISPATCH(runtime·call268435456, 268435456)
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DISPATCH(runtime·call536870912, 536870912)
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DISPATCH(runtime·call1073741824, 1073741824)
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MOVV $runtime·badreflectcall(SB), R4
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JMP (R4)
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#define CALLFN(NAME,MAXSIZE) \
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TEXT NAME(SB), WRAPPER, $MAXSIZE-24; \
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NO_LOCAL_POINTERS; \
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/* copy arguments to stack */ \
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MOVV arg+16(FP), R4; \
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MOVWU argsize+24(FP), R5; \
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MOVV R3, R12; \
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ADDV $8, R12; \
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ADDV R12, R5; \
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BEQ R12, R5, 6(PC); \
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MOVBU (R4), R6; \
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ADDV $1, R4; \
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MOVBU R6, (R12); \
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ADDV $1, R12; \
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JMP -5(PC); \
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/* call function */ \
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MOVV f+8(FP), REGCTXT; \
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MOVV (REGCTXT), R6; \
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PCDATA $PCDATA_StackMapIndex, $0; \
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JAL (R6); \
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/* copy return values back */ \
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||||||
|
MOVV argtype+0(FP), R7; \
|
||||||
|
MOVV arg+16(FP), R4; \
|
||||||
|
MOVWU n+24(FP), R5; \
|
||||||
|
MOVWU retoffset+28(FP), R6; \
|
||||||
|
ADDV $8, R3, R12; \
|
||||||
|
ADDV R6, R12; \
|
||||||
|
ADDV R6, R4; \
|
||||||
|
SUBVU R6, R5; \
|
||||||
|
JAL callRet<>(SB); \
|
||||||
|
RET
|
||||||
|
|
||||||
|
// callRet copies return values back at the end of call*. This is a
|
||||||
|
// separate function so it can allocate stack space for the arguments
|
||||||
|
// to reflectcallmove. It does not follow the Go ABI; it expects its
|
||||||
|
// arguments in registers.
|
||||||
|
TEXT callRet<>(SB), NOSPLIT, $32-0
|
||||||
|
MOVV R7, 8(R3)
|
||||||
|
MOVV R4, 16(R3)
|
||||||
|
MOVV R12, 24(R3)
|
||||||
|
MOVV R5, 32(R3)
|
||||||
|
JAL runtime·reflectcallmove(SB)
|
||||||
|
RET
|
||||||
|
|
||||||
|
CALLFN(·call16, 16)
|
||||||
|
CALLFN(·call32, 32)
|
||||||
|
CALLFN(·call64, 64)
|
||||||
|
CALLFN(·call128, 128)
|
||||||
|
CALLFN(·call256, 256)
|
||||||
|
CALLFN(·call512, 512)
|
||||||
|
CALLFN(·call1024, 1024)
|
||||||
|
CALLFN(·call2048, 2048)
|
||||||
|
CALLFN(·call4096, 4096)
|
||||||
|
CALLFN(·call8192, 8192)
|
||||||
|
CALLFN(·call16384, 16384)
|
||||||
|
CALLFN(·call32768, 32768)
|
||||||
|
CALLFN(·call65536, 65536)
|
||||||
|
CALLFN(·call131072, 131072)
|
||||||
|
CALLFN(·call262144, 262144)
|
||||||
|
CALLFN(·call524288, 524288)
|
||||||
|
CALLFN(·call1048576, 1048576)
|
||||||
|
CALLFN(·call2097152, 2097152)
|
||||||
|
CALLFN(·call4194304, 4194304)
|
||||||
|
CALLFN(·call8388608, 8388608)
|
||||||
|
CALLFN(·call16777216, 16777216)
|
||||||
|
CALLFN(·call33554432, 33554432)
|
||||||
|
CALLFN(·call67108864, 67108864)
|
||||||
|
CALLFN(·call134217728, 134217728)
|
||||||
|
CALLFN(·call268435456, 268435456)
|
||||||
|
CALLFN(·call536870912, 536870912)
|
||||||
|
CALLFN(·call1073741824, 1073741824)
|
||||||
|
|
||||||
|
TEXT runtime·procyield(SB),NOSPLIT,$0-0
|
||||||
|
RET
|
||||||
|
|
||||||
|
// Save state of caller into g->sched.
|
||||||
|
// but using fake PC from systemstack_switch.
|
||||||
|
// Must only be called from functions with no locals ($0)
|
||||||
|
// or else unwinding from systemstack_switch is incorrect.
|
||||||
|
// Smashes R19.
|
||||||
|
TEXT gosave_systemstack_switch<>(SB),NOSPLIT|NOFRAME,$0
|
||||||
|
MOVV $runtime·systemstack_switch(SB), R19
|
||||||
|
ADDV $8, R19
|
||||||
|
MOVV R19, (g_sched+gobuf_pc)(g)
|
||||||
|
MOVV R3, (g_sched+gobuf_sp)(g)
|
||||||
|
MOVV R0, (g_sched+gobuf_lr)(g)
|
||||||
|
MOVV R0, (g_sched+gobuf_ret)(g)
|
||||||
|
// Assert ctxt is zero. See func save.
|
||||||
|
MOVV (g_sched+gobuf_ctxt)(g), R19
|
||||||
|
BEQ R19, 2(PC)
|
||||||
|
JAL runtime·abort(SB)
|
||||||
|
RET
|
||||||
|
|
||||||
|
// func asmcgocall(fn, arg unsafe.Pointer) int32
|
||||||
|
// Call fn(arg) on the scheduler stack,
|
||||||
|
// aligned appropriately for the gcc ABI.
|
||||||
|
// See cgocall.go for more details.
|
||||||
|
TEXT ·asmcgocall(SB),NOSPLIT,$0-20
|
||||||
|
MOVV fn+0(FP), R25
|
||||||
|
MOVV arg+8(FP), R4
|
||||||
|
|
||||||
|
MOVV R3, R12 // save original stack pointer
|
||||||
|
MOVV g, R13
|
||||||
|
|
||||||
|
// Figure out if we need to switch to m->g0 stack.
|
||||||
|
// We get called to create new OS threads too, and those
|
||||||
|
// come in on the m->g0 stack already.
|
||||||
|
MOVV g_m(g), R5
|
||||||
|
MOVV m_gsignal(R5), R6
|
||||||
|
BEQ R6, g, g0
|
||||||
|
MOVV m_g0(R5), R6
|
||||||
|
BEQ R6, g, g0
|
||||||
|
|
||||||
|
JAL gosave_systemstack_switch<>(SB)
|
||||||
|
MOVV R6, g
|
||||||
|
JAL runtime·save_g(SB)
|
||||||
|
MOVV (g_sched+gobuf_sp)(g), R3
|
||||||
|
|
||||||
|
// Now on a scheduling stack (a pthread-created stack).
|
||||||
|
g0:
|
||||||
|
// Save room for two of our pointers.
|
||||||
|
ADDV $-16, R3
|
||||||
|
MOVV R13, 0(R3) // save old g on stack
|
||||||
|
MOVV (g_stack+stack_hi)(R13), R13
|
||||||
|
SUBVU R12, R13
|
||||||
|
MOVV R13, 8(R3) // save depth in old g stack (can't just save SP, as stack might be copied during a callback)
|
||||||
|
JAL (R25)
|
||||||
|
|
||||||
|
// Restore g, stack pointer. R4 is return value.
|
||||||
|
MOVV 0(R3), g
|
||||||
|
JAL runtime·save_g(SB)
|
||||||
|
MOVV (g_stack+stack_hi)(g), R5
|
||||||
|
MOVV 8(R3), R6
|
||||||
|
SUBVU R6, R5
|
||||||
|
MOVV R5, R3
|
||||||
|
|
||||||
|
MOVW R4, ret+16(FP)
|
||||||
|
RET
|
||||||
|
|
||||||
|
// func cgocallback(fn, frame unsafe.Pointer, ctxt uintptr)
|
||||||
|
// See cgocall.go for more details.
|
||||||
|
TEXT ·cgocallback(SB),NOSPLIT,$24-24
|
||||||
|
NO_LOCAL_POINTERS
|
||||||
|
|
||||||
|
// Load m and g from thread-local storage.
|
||||||
|
MOVB runtime·iscgo(SB), R19
|
||||||
|
BEQ R19, nocgo
|
||||||
|
JAL runtime·load_g(SB)
|
||||||
|
nocgo:
|
||||||
|
|
||||||
|
// If g is nil, Go did not create the current thread.
|
||||||
|
// Call needm to obtain one for temporary use.
|
||||||
|
// In this case, we're running on the thread stack, so there's
|
||||||
|
// lots of space, but the linker doesn't know. Hide the call from
|
||||||
|
// the linker analysis by using an indirect call.
|
||||||
|
BEQ g, needm
|
||||||
|
|
||||||
|
MOVV g_m(g), R12
|
||||||
|
MOVV R12, savedm-8(SP)
|
||||||
|
JMP havem
|
||||||
|
|
||||||
|
needm:
|
||||||
|
MOVV g, savedm-8(SP) // g is zero, so is m.
|
||||||
|
MOVV $runtime·needm(SB), R4
|
||||||
|
JAL (R4)
|
||||||
|
|
||||||
|
// Set m->sched.sp = SP, so that if a panic happens
|
||||||
|
// during the function we are about to execute, it will
|
||||||
|
// have a valid SP to run on the g0 stack.
|
||||||
|
// The next few lines (after the havem label)
|
||||||
|
// will save this SP onto the stack and then write
|
||||||
|
// the same SP back to m->sched.sp. That seems redundant,
|
||||||
|
// but if an unrecovered panic happens, unwindm will
|
||||||
|
// restore the g->sched.sp from the stack location
|
||||||
|
// and then systemstack will try to use it. If we don't set it here,
|
||||||
|
// that restored SP will be uninitialized (typically 0) and
|
||||||
|
// will not be usable.
|
||||||
|
MOVV g_m(g), R12
|
||||||
|
MOVV m_g0(R12), R19
|
||||||
|
MOVV R3, (g_sched+gobuf_sp)(R19)
|
||||||
|
|
||||||
|
havem:
|
||||||
|
// Now there's a valid m, and we're running on its m->g0.
|
||||||
|
// Save current m->g0->sched.sp on stack and then set it to SP.
|
||||||
|
// Save current sp in m->g0->sched.sp in preparation for
|
||||||
|
// switch back to m->curg stack.
|
||||||
|
// NOTE: unwindm knows that the saved g->sched.sp is at 8(R29) aka savedsp-16(SP).
|
||||||
|
MOVV m_g0(R12), R19
|
||||||
|
MOVV (g_sched+gobuf_sp)(R19), R13
|
||||||
|
MOVV R13, savedsp-24(SP) // must match frame size
|
||||||
|
MOVV R3, (g_sched+gobuf_sp)(R19)
|
||||||
|
|
||||||
|
// Switch to m->curg stack and call runtime.cgocallbackg.
|
||||||
|
// Because we are taking over the execution of m->curg
|
||||||
|
// but *not* resuming what had been running, we need to
|
||||||
|
// save that information (m->curg->sched) so we can restore it.
|
||||||
|
// We can restore m->curg->sched.sp easily, because calling
|
||||||
|
// runtime.cgocallbackg leaves SP unchanged upon return.
|
||||||
|
// To save m->curg->sched.pc, we push it onto the stack.
|
||||||
|
// This has the added benefit that it looks to the traceback
|
||||||
|
// routine like cgocallbackg is going to return to that
|
||||||
|
// PC (because the frame we allocate below has the same
|
||||||
|
// size as cgocallback_gofunc's frame declared above)
|
||||||
|
// so that the traceback will seamlessly trace back into
|
||||||
|
// the earlier calls.
|
||||||
|
MOVV m_curg(R12), g
|
||||||
|
JAL runtime·save_g(SB)
|
||||||
|
MOVV (g_sched+gobuf_sp)(g), R13 // prepare stack as R13
|
||||||
|
MOVV (g_sched+gobuf_pc)(g), R4
|
||||||
|
MOVV R4, -(24+8)(R13) // "saved LR"; must match frame size
|
||||||
|
MOVV fn+0(FP), R5
|
||||||
|
MOVV frame+8(FP), R6
|
||||||
|
MOVV ctxt+16(FP), R7
|
||||||
|
MOVV $-(24+8)(R13), R3
|
||||||
|
MOVV R5, 8(R3)
|
||||||
|
MOVV R6, 16(R3)
|
||||||
|
MOVV R7, 24(R3)
|
||||||
|
JAL runtime·cgocallbackg(SB)
|
||||||
|
|
||||||
|
// Restore g->sched (== m->curg->sched) from saved values.
|
||||||
|
MOVV 0(R3), R4
|
||||||
|
MOVV R4, (g_sched+gobuf_pc)(g)
|
||||||
|
MOVV $(24+8)(R3), R13 // must match frame size
|
||||||
|
MOVV R13, (g_sched+gobuf_sp)(g)
|
||||||
|
|
||||||
|
// Switch back to m->g0's stack and restore m->g0->sched.sp.
|
||||||
|
// (Unlike m->curg, the g0 goroutine never uses sched.pc,
|
||||||
|
// so we do not have to restore it.)
|
||||||
|
MOVV g_m(g), R12
|
||||||
|
MOVV m_g0(R12), g
|
||||||
|
JAL runtime·save_g(SB)
|
||||||
|
MOVV (g_sched+gobuf_sp)(g), R3
|
||||||
|
MOVV savedsp-24(SP), R13 // must match frame size
|
||||||
|
MOVV R13, (g_sched+gobuf_sp)(g)
|
||||||
|
|
||||||
|
// If the m on entry was nil, we called needm above to borrow an m
|
||||||
|
// for the duration of the call. Since the call is over, return it with dropm.
|
||||||
|
MOVV savedm-8(SP), R12
|
||||||
|
BNE R12, droppedm
|
||||||
|
MOVV $runtime·dropm(SB), R4
|
||||||
|
JAL (R4)
|
||||||
|
droppedm:
|
||||||
|
|
||||||
|
// Done!
|
||||||
|
RET
|
||||||
|
|
||||||
|
// void setg(G*); set g. for use by needm.
|
||||||
|
TEXT runtime·setg(SB), NOSPLIT, $0-8
|
||||||
|
MOVV gg+0(FP), g
|
||||||
|
// This only happens if iscgo, so jump straight to save_g
|
||||||
|
JAL runtime·save_g(SB)
|
||||||
|
RET
|
||||||
|
|
||||||
|
// void setg_gcc(G*); set g called from gcc with g in R19
|
||||||
|
TEXT setg_gcc<>(SB),NOSPLIT,$0-0
|
||||||
|
MOVV R19, g
|
||||||
|
JAL runtime·save_g(SB)
|
||||||
|
RET
|
||||||
|
|
||||||
|
TEXT runtime·abort(SB),NOSPLIT|NOFRAME,$0-0
|
||||||
|
MOVW (R0), R0
|
||||||
|
UNDEF
|
||||||
|
|
||||||
|
// AES hashing not implemented for loong64
|
||||||
|
TEXT runtime·memhash(SB),NOSPLIT|NOFRAME,$0-32
|
||||||
|
JMP runtime·memhashFallback(SB)
|
||||||
|
TEXT runtime·strhash(SB),NOSPLIT|NOFRAME,$0-24
|
||||||
|
JMP runtime·strhashFallback(SB)
|
||||||
|
TEXT runtime·memhash32(SB),NOSPLIT|NOFRAME,$0-24
|
||||||
|
JMP runtime·memhash32Fallback(SB)
|
||||||
|
TEXT runtime·memhash64(SB),NOSPLIT|NOFRAME,$0-24
|
||||||
|
JMP runtime·memhash64Fallback(SB)
|
||||||
|
|
||||||
|
TEXT runtime·return0(SB), NOSPLIT, $0
|
||||||
|
MOVW $0, R19
|
||||||
|
RET
|
||||||
|
|
||||||
|
// Called from cgo wrappers, this function returns g->m->curg.stack.hi.
|
||||||
|
// Must obey the gcc calling convention.
|
||||||
|
TEXT _cgo_topofstack(SB),NOSPLIT,$16
|
||||||
|
// g (R22) and REGTMP (R30) might be clobbered by load_g. They
|
||||||
|
// are callee-save in the gcc calling convention, so save them.
|
||||||
|
MOVV R30, savedREGTMP-16(SP)
|
||||||
|
MOVV g, savedG-8(SP)
|
||||||
|
|
||||||
|
JAL runtime·load_g(SB)
|
||||||
|
MOVV g_m(g), R19
|
||||||
|
MOVV m_curg(R19), R19
|
||||||
|
MOVV (g_stack+stack_hi)(R19), R4 // return value in R4
|
||||||
|
|
||||||
|
MOVV savedG-8(SP), g
|
||||||
|
MOVV savedREGTMP-16(SP), R30
|
||||||
|
RET
|
||||||
|
|
||||||
|
// The top-most function running on a goroutine
|
||||||
|
// returns to goexit+PCQuantum.
|
||||||
|
TEXT runtime·goexit(SB),NOSPLIT|NOFRAME|TOPFRAME,$0-0
|
||||||
|
NOR R0, R0 // NOP
|
||||||
|
JAL runtime·goexit1(SB) // does not return
|
||||||
|
// traceback from goexit1 must hit code range of goexit
|
||||||
|
NOR R0, R0 // NOP
|
||||||
|
|
||||||
|
TEXT ·checkASM(SB),NOSPLIT,$0-1
|
||||||
|
MOVW $1, R19
|
||||||
|
MOVB R19, ret+0(FP)
|
||||||
|
RET
|
||||||
|
|
||||||
|
// gcWriteBarrier performs a heap pointer write and informs the GC.
|
||||||
|
//
|
||||||
|
// gcWriteBarrier does NOT follow the Go ABI. It takes two arguments:
|
||||||
|
// - R27 is the destination of the write
|
||||||
|
// - R28 is the value being written at R27.
|
||||||
|
// It clobbers R30 (the linker temp register).
|
||||||
|
// The act of CALLing gcWriteBarrier will clobber R1 (LR).
|
||||||
|
// It does not clobber any other general-purpose registers,
|
||||||
|
// but may clobber others (e.g., floating point registers).
|
||||||
|
TEXT runtime·gcWriteBarrier(SB),NOSPLIT,$216
|
||||||
|
// Save the registers clobbered by the fast path.
|
||||||
|
MOVV R19, 208(R3)
|
||||||
|
MOVV R13, 216(R3)
|
||||||
|
MOVV g_m(g), R19
|
||||||
|
MOVV m_p(R19), R19
|
||||||
|
MOVV (p_wbBuf+wbBuf_next)(R19), R13
|
||||||
|
// Increment wbBuf.next position.
|
||||||
|
ADDV $16, R13
|
||||||
|
MOVV R13, (p_wbBuf+wbBuf_next)(R19)
|
||||||
|
MOVV (p_wbBuf+wbBuf_end)(R19), R19
|
||||||
|
MOVV R19, R30 // R30 is linker temp register
|
||||||
|
// Record the write.
|
||||||
|
MOVV R28, -16(R13) // Record value
|
||||||
|
MOVV (R27), R19 // TODO: This turns bad writes into bad reads.
|
||||||
|
MOVV R19, -8(R13) // Record *slot
|
||||||
|
// Is the buffer full?
|
||||||
|
BEQ R13, R30, flush
|
||||||
|
ret:
|
||||||
|
MOVV 208(R3), R19
|
||||||
|
MOVV 216(R3), R13
|
||||||
|
// Do the write.
|
||||||
|
MOVV R28, (R27)
|
||||||
|
RET
|
||||||
|
|
||||||
|
flush:
|
||||||
|
// Save all general purpose registers since these could be
|
||||||
|
// clobbered by wbBufFlush and were not saved by the caller.
|
||||||
|
MOVV R27, 8(R3) // Also first argument to wbBufFlush
|
||||||
|
MOVV R28, 16(R3) // Also second argument to wbBufFlush
|
||||||
|
// R1 is LR, which was saved by the prologue.
|
||||||
|
MOVV R2, 24(R3)
|
||||||
|
// R3 is SP.
|
||||||
|
MOVV R4, 32(R3)
|
||||||
|
MOVV R5, 40(R3)
|
||||||
|
MOVV R6, 48(R3)
|
||||||
|
MOVV R7, 56(R3)
|
||||||
|
MOVV R8, 64(R3)
|
||||||
|
MOVV R9, 72(R3)
|
||||||
|
MOVV R10, 80(R3)
|
||||||
|
MOVV R11, 88(R3)
|
||||||
|
MOVV R12, 96(R3)
|
||||||
|
// R13 already saved
|
||||||
|
MOVV R14, 104(R3)
|
||||||
|
MOVV R15, 112(R3)
|
||||||
|
MOVV R16, 120(R3)
|
||||||
|
MOVV R17, 128(R3)
|
||||||
|
MOVV R18, 136(R3)
|
||||||
|
// R19 already saved
|
||||||
|
MOVV R20, 144(R3)
|
||||||
|
MOVV R21, 152(R3)
|
||||||
|
// R22 is g.
|
||||||
|
MOVV R23, 160(R3)
|
||||||
|
MOVV R24, 168(R3)
|
||||||
|
MOVV R25, 176(R3)
|
||||||
|
MOVV R26, 184(R3)
|
||||||
|
// R27 already saved
|
||||||
|
// R28 already saved.
|
||||||
|
MOVV R29, 192(R3)
|
||||||
|
// R30 is tmp register.
|
||||||
|
MOVV R31, 200(R3)
|
||||||
|
|
||||||
|
|
||||||
|
// This takes arguments R27 and R28.
|
||||||
|
CALL runtime·wbBufFlush(SB)
|
||||||
|
|
||||||
|
MOVV 8(R3), R27
|
||||||
|
MOVV 16(R3), R28
|
||||||
|
MOVV 24(R3), R2
|
||||||
|
MOVV 32(R3), R4
|
||||||
|
MOVV 40(R3), R5
|
||||||
|
MOVV 48(R3), R6
|
||||||
|
MOVV 56(R3), R7
|
||||||
|
MOVV 64(R3), R8
|
||||||
|
MOVV 72(R3), R9
|
||||||
|
MOVV 80(R3), R10
|
||||||
|
MOVV 88(R3), R11
|
||||||
|
MOVV 96(R3), R12
|
||||||
|
MOVV 104(R3), R14
|
||||||
|
MOVV 112(R3), R15
|
||||||
|
MOVV 120(R3), R16
|
||||||
|
MOVV 128(R3), R17
|
||||||
|
MOVV 136(R3), R18
|
||||||
|
MOVV 144(R3), R20
|
||||||
|
MOVV 152(R3), R21
|
||||||
|
MOVV 160(R3), R23
|
||||||
|
MOVV 168(R3), R24
|
||||||
|
MOVV 176(R3), R25
|
||||||
|
MOVV 184(R3), R26
|
||||||
|
MOVV 192(R3), R29
|
||||||
|
MOVV 200(R3), R31
|
||||||
|
JMP ret
|
||||||
|
|
||||||
|
// Note: these functions use a special calling convention to save generated code space.
|
||||||
|
// Arguments are passed in registers, but the space for those arguments are allocated
|
||||||
|
// in the caller's stack frame. These stubs write the args into that stack space and
|
||||||
|
// then tail call to the corresponding runtime handler.
|
||||||
|
// The tail call makes these stubs disappear in backtraces.
|
||||||
|
TEXT runtime·panicIndex(SB),NOSPLIT,$0-16
|
||||||
|
MOVV R19, x+0(FP)
|
||||||
|
MOVV R18, y+8(FP)
|
||||||
|
JMP runtime·goPanicIndex(SB)
|
||||||
|
TEXT runtime·panicIndexU(SB),NOSPLIT,$0-16
|
||||||
|
MOVV R19, x+0(FP)
|
||||||
|
MOVV R18, y+8(FP)
|
||||||
|
JMP runtime·goPanicIndexU(SB)
|
||||||
|
TEXT runtime·panicSliceAlen(SB),NOSPLIT,$0-16
|
||||||
|
MOVV R18, x+0(FP)
|
||||||
|
MOVV R17, y+8(FP)
|
||||||
|
JMP runtime·goPanicSliceAlen(SB)
|
||||||
|
TEXT runtime·panicSliceAlenU(SB),NOSPLIT,$0-16
|
||||||
|
MOVV R18, x+0(FP)
|
||||||
|
MOVV R17, y+8(FP)
|
||||||
|
JMP runtime·goPanicSliceAlenU(SB)
|
||||||
|
TEXT runtime·panicSliceAcap(SB),NOSPLIT,$0-16
|
||||||
|
MOVV R18, x+0(FP)
|
||||||
|
MOVV R17, y+8(FP)
|
||||||
|
JMP runtime·goPanicSliceAcap(SB)
|
||||||
|
TEXT runtime·panicSliceAcapU(SB),NOSPLIT,$0-16
|
||||||
|
MOVV R18, x+0(FP)
|
||||||
|
MOVV R17, y+8(FP)
|
||||||
|
JMP runtime·goPanicSliceAcapU(SB)
|
||||||
|
TEXT runtime·panicSliceB(SB),NOSPLIT,$0-16
|
||||||
|
MOVV R19, x+0(FP)
|
||||||
|
MOVV R18, y+8(FP)
|
||||||
|
JMP runtime·goPanicSliceB(SB)
|
||||||
|
TEXT runtime·panicSliceBU(SB),NOSPLIT,$0-16
|
||||||
|
MOVV R19, x+0(FP)
|
||||||
|
MOVV R18, y+8(FP)
|
||||||
|
JMP runtime·goPanicSliceBU(SB)
|
||||||
|
TEXT runtime·panicSlice3Alen(SB),NOSPLIT,$0-16
|
||||||
|
MOVV R17, x+0(FP)
|
||||||
|
MOVV R4, y+8(FP)
|
||||||
|
JMP runtime·goPanicSlice3Alen(SB)
|
||||||
|
TEXT runtime·panicSlice3AlenU(SB),NOSPLIT,$0-16
|
||||||
|
MOVV R17, x+0(FP)
|
||||||
|
MOVV R4, y+8(FP)
|
||||||
|
JMP runtime·goPanicSlice3AlenU(SB)
|
||||||
|
TEXT runtime·panicSlice3Acap(SB),NOSPLIT,$0-16
|
||||||
|
MOVV R17, x+0(FP)
|
||||||
|
MOVV R4, y+8(FP)
|
||||||
|
JMP runtime·goPanicSlice3Acap(SB)
|
||||||
|
TEXT runtime·panicSlice3AcapU(SB),NOSPLIT,$0-16
|
||||||
|
MOVV R17, x+0(FP)
|
||||||
|
MOVV R4, y+8(FP)
|
||||||
|
JMP runtime·goPanicSlice3AcapU(SB)
|
||||||
|
TEXT runtime·panicSlice3B(SB),NOSPLIT,$0-16
|
||||||
|
MOVV R18, x+0(FP)
|
||||||
|
MOVV R17, y+8(FP)
|
||||||
|
JMP runtime·goPanicSlice3B(SB)
|
||||||
|
TEXT runtime·panicSlice3BU(SB),NOSPLIT,$0-16
|
||||||
|
MOVV R18, x+0(FP)
|
||||||
|
MOVV R17, y+8(FP)
|
||||||
|
JMP runtime·goPanicSlice3BU(SB)
|
||||||
|
TEXT runtime·panicSlice3C(SB),NOSPLIT,$0-16
|
||||||
|
MOVV R19, x+0(FP)
|
||||||
|
MOVV R18, y+8(FP)
|
||||||
|
JMP runtime·goPanicSlice3C(SB)
|
||||||
|
TEXT runtime·panicSlice3CU(SB),NOSPLIT,$0-16
|
||||||
|
MOVV R19, x+0(FP)
|
||||||
|
MOVV R18, y+8(FP)
|
||||||
|
JMP runtime·goPanicSlice3CU(SB)
|
||||||
|
TEXT runtime·panicSliceConvert(SB),NOSPLIT,$0-16
|
||||||
|
MOVV R17, x+0(FP)
|
||||||
|
MOVV R4, y+8(FP)
|
||||||
|
JMP runtime·goPanicSliceConvert(SB)
|
||||||
9
src/runtime/atomic_loong64.s
Normal file
9
src/runtime/atomic_loong64.s
Normal file
@ -0,0 +1,9 @@
|
|||||||
|
// 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"
|
||||||
|
|
||||||
|
TEXT ·publicationBarrier(SB),NOSPLIT|NOFRAME,$0-0
|
||||||
|
DBAR
|
||||||
|
RET
|
||||||
@ -2,7 +2,7 @@
|
|||||||
// Use of this source code is governed by a BSD-style
|
// Use of this source code is governed by a BSD-style
|
||||||
// license that can be found in the LICENSE file.
|
// license that can be found in the LICENSE file.
|
||||||
|
|
||||||
//go:build !arm && !arm64 && !mips64 && !mips64le && !mips && !mipsle && !wasm
|
//go:build !arm && !arm64 && !loong64 && !mips64 && !mips64le && !mips && !mipsle && !wasm
|
||||||
|
|
||||||
package runtime
|
package runtime
|
||||||
|
|
||||||
|
|||||||
18
src/runtime/os_linux_loong64.go
Normal file
18
src/runtime/os_linux_loong64.go
Normal file
@ -0,0 +1,18 @@
|
|||||||
|
// 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.
|
||||||
|
|
||||||
|
//go:build linux && loong64
|
||||||
|
|
||||||
|
package runtime
|
||||||
|
|
||||||
|
func archauxv(tag, val uintptr) {}
|
||||||
|
|
||||||
|
func osArchInit() {}
|
||||||
|
|
||||||
|
//go:nosplit
|
||||||
|
func cputicks() int64 {
|
||||||
|
// Currently cputicks() is used in blocking profiler and to seed fastrand().
|
||||||
|
// nanotime() is a poor approximation of CPU ticks that is enough for the profiler.
|
||||||
|
return nanotime()
|
||||||
|
}
|
||||||
@ -2,7 +2,7 @@
|
|||||||
// Use of this source code is governed by a BSD-style
|
// Use of this source code is governed by a BSD-style
|
||||||
// license that can be found in the LICENSE file.
|
// license that can be found in the LICENSE file.
|
||||||
|
|
||||||
//go:build linux && !arm && !arm64 && !mips && !mipsle && !mips64 && !mips64le && !s390x && !ppc64 && !ppc64le
|
//go:build linux && !arm && !arm64 && !loong64 && !mips && !mipsle && !mips64 && !mips64le && !s390x && !ppc64 && !ppc64le
|
||||||
|
|
||||||
package runtime
|
package runtime
|
||||||
|
|
||||||
|
|||||||
24
src/runtime/rt0_linux_loong64.s
Normal file
24
src/runtime/rt0_linux_loong64.s
Normal file
@ -0,0 +1,24 @@
|
|||||||
|
// 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"
|
||||||
|
|
||||||
|
TEXT _rt0_loong64_linux(SB),NOSPLIT,$0
|
||||||
|
JMP _main<>(SB)
|
||||||
|
|
||||||
|
TEXT _main<>(SB),NOSPLIT|NOFRAME,$0
|
||||||
|
// In a statically linked binary, the stack contains argc,
|
||||||
|
// argv as argc string pointers followed by a NULL, envv as a
|
||||||
|
// sequence of string pointers followed by a NULL, and auxv.
|
||||||
|
// There is no TLS base pointer.
|
||||||
|
MOVW 0(R3), R4 // argc
|
||||||
|
ADDV $8, R3, R5 // argv
|
||||||
|
JMP main(SB)
|
||||||
|
|
||||||
|
TEXT main(SB),NOSPLIT|NOFRAME,$0
|
||||||
|
// in external linking, glibc jumps to main with argc in R4
|
||||||
|
// and argv in R5
|
||||||
|
|
||||||
|
MOVV $runtime·rt0_go(SB), R19
|
||||||
|
JMP (R19)
|
||||||
20
src/runtime/sys_loong64.go
Normal file
20
src/runtime/sys_loong64.go
Normal file
@ -0,0 +1,20 @@
|
|||||||
|
// 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.
|
||||||
|
|
||||||
|
//go:build loong64
|
||||||
|
|
||||||
|
package runtime
|
||||||
|
|
||||||
|
import "unsafe"
|
||||||
|
|
||||||
|
// adjust Gobuf as if it executed a call to fn with context ctxt
|
||||||
|
// and then did an immediate Gosave.
|
||||||
|
func gostartcall(buf *gobuf, fn, ctxt unsafe.Pointer) {
|
||||||
|
if buf.lr != 0 {
|
||||||
|
throw("invalid use of gostartcall")
|
||||||
|
}
|
||||||
|
buf.lr = buf.pc
|
||||||
|
buf.pc = uintptr(fn)
|
||||||
|
buf.ctxt = ctxt
|
||||||
|
}
|
||||||
Loading…
x
Reference in New Issue
Block a user