mirror of https://go.googlesource.com/go
952 lines
26 KiB
ArmAsm
952 lines
26 KiB
ArmAsm
// 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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//go:build mips || mipsle
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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 R22
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TEXT runtime·rt0_go(SB),NOSPLIT|TOPFRAME,$0
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// R29 = stack; R4 = argc; R5 = argv
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ADDU $-12, R29
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MOVW R4, 4(R29) // argc
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MOVW R5, 8(R29) // 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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MOVW $runtime·g0(SB), g
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MOVW $(-64*1024), R23
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ADD R23, R29, R1
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MOVW R1, g_stackguard0(g)
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MOVW R1, g_stackguard1(g)
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MOVW R1, (g_stack+stack_lo)(g)
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MOVW R29, (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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MOVW _cgo_init(SB), R25
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BEQ R25, nocgo
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ADDU $-16, R29
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MOVW R0, R7 // arg 3: not used
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MOVW R0, R6 // arg 2: not used
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MOVW $setg_gcc<>(SB), R5 // arg 1: setg
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MOVW g, R4 // arg 0: G
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JAL (R25)
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ADDU $16, R29
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nocgo:
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// update stackguard after _cgo_init
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MOVW (g_stack+stack_lo)(g), R1
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ADD $const_stackGuard, R1
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MOVW R1, g_stackguard0(g)
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MOVW R1, g_stackguard1(g)
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// set the per-goroutine and per-mach "registers"
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MOVW $runtime·m0(SB), R1
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// save m->g0 = g0
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MOVW g, m_g0(R1)
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// save m0 to g0->m
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MOVW R1, 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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MOVW $runtime·mainPC(SB), R1 // entry
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ADDU $-8, R29
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MOVW R1, 4(R29)
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MOVW R0, 0(R29)
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JAL runtime·newproc(SB)
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ADDU $8, R29
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// start this M
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JAL runtime·mstart(SB)
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UNDEF
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RET
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DATA runtime·mainPC+0(SB)/4,$runtime·main(SB)
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GLOBL runtime·mainPC(SB),RODATA,$4
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TEXT runtime·breakpoint(SB),NOSPLIT,$0-0
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BREAK
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RET
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TEXT runtime·asminit(SB),NOSPLIT,$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 gogo(Gobuf*)
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// restore state from Gobuf; longjmp
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TEXT runtime·gogo(SB),NOSPLIT|NOFRAME,$0-4
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MOVW buf+0(FP), R3
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MOVW gobuf_g(R3), R4
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MOVW 0(R4), R5 // make sure g != nil
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JMP gogo<>(SB)
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TEXT gogo<>(SB),NOSPLIT|NOFRAME,$0
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MOVW R4, g
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JAL runtime·save_g(SB)
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MOVW gobuf_sp(R3), R29
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MOVW gobuf_lr(R3), R31
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MOVW gobuf_ret(R3), R1
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MOVW gobuf_ctxt(R3), REGCTXT
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MOVW R0, gobuf_sp(R3)
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MOVW R0, gobuf_ret(R3)
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MOVW R0, gobuf_lr(R3)
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MOVW R0, gobuf_ctxt(R3)
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MOVW gobuf_pc(R3), R4
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JMP (R4)
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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,$0-4
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// Save caller state in g->sched
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MOVW R29, (g_sched+gobuf_sp)(g)
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MOVW R31, (g_sched+gobuf_pc)(g)
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MOVW R0, (g_sched+gobuf_lr)(g)
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// Switch to m->g0 & its stack, call fn.
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MOVW g, R1
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MOVW g_m(g), R3
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MOVW m_g0(R3), g
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JAL runtime·save_g(SB)
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BNE g, R1, 2(PC)
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JMP runtime·badmcall(SB)
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MOVW fn+0(FP), REGCTXT // context
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MOVW 0(REGCTXT), R4 // code pointer
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MOVW (g_sched+gobuf_sp)(g), R29 // sp = m->g0->sched.sp
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ADDU $-8, R29 // make room for 1 arg and fake LR
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MOVW R1, 4(R29)
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MOVW R0, 0(R29)
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JAL (R4)
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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 (R31) // 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,$0-4
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MOVW fn+0(FP), R1 // R1 = fn
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MOVW R1, REGCTXT // context
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MOVW g_m(g), R2 // R2 = m
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MOVW m_gsignal(R2), R3 // R3 = gsignal
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BEQ g, R3, noswitch
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MOVW m_g0(R2), R3 // R3 = g0
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BEQ g, R3, noswitch
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MOVW m_curg(R2), R4
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BEQ g, R4, 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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MOVW $runtime·badsystemstack(SB), R4
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JAL (R4)
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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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MOVW R3, g
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JAL runtime·save_g(SB)
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MOVW (g_sched+gobuf_sp)(g), R1
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MOVW R1, R29
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// call target function
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MOVW 0(REGCTXT), R4 // code pointer
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JAL (R4)
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// switch back to g
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MOVW g_m(g), R1
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MOVW m_curg(R1), g
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JAL runtime·save_g(SB)
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MOVW (g_sched+gobuf_sp)(g), R29
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MOVW 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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MOVW 0(REGCTXT), R4 // code pointer
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MOVW 0(R29), R31 // restore LR
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ADD $4, R29
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JMP (R4)
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// func switchToCrashStack0(fn func())
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TEXT runtime·switchToCrashStack0(SB), NOSPLIT, $0-4
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MOVW fn+0(FP), REGCTXT // context register
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MOVW g_m(g), R2 // curm
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// set g to gcrash
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MOVW $runtime·gcrash(SB), g // g = &gcrash
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CALL runtime·save_g(SB)
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MOVW R2, g_m(g) // g.m = curm
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MOVW g, m_g0(R2) // curm.g0 = g
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// switch to crashstack
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MOVW (g_stack+stack_hi)(g), R2
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ADDU $(-4*8), R2, R29
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// call target function
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MOVW 0(REGCTXT), R25
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JAL (R25)
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// should never return
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CALL runtime·abort(SB)
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UNDEF
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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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// R1: framesize, R2: argsize, R3: 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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// Called from f.
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// Set g->sched to context in f.
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MOVW R29, (g_sched+gobuf_sp)(g)
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MOVW R31, (g_sched+gobuf_pc)(g)
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MOVW R3, (g_sched+gobuf_lr)(g)
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MOVW REGCTXT, (g_sched+gobuf_ctxt)(g)
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// Cannot grow scheduler stack (m->g0).
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MOVW g_m(g), R7
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MOVW 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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MOVW 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 m->morebuf to f's caller.
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MOVW R3, (m_morebuf+gobuf_pc)(R7) // f's caller's PC
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MOVW R29, (m_morebuf+gobuf_sp)(R7) // f's caller's SP
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MOVW g, (m_morebuf+gobuf_g)(R7)
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// Call newstack on m->g0's stack.
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MOVW m_g0(R7), g
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JAL runtime·save_g(SB)
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MOVW (g_sched+gobuf_sp)(g), R29
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// Create a stack frame on g0 to call newstack.
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MOVW R0, -4(R29) // Zero saved LR in frame
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ADDU $-4, R29
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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,$0-0
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// Force SPWRITE. This function doesn't actually write SP,
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// but it is called with a special calling convention where
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// the caller doesn't save LR on stack but passes it as a
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// register (R3), and the unwinder currently doesn't understand.
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// Make it SPWRITE to stop unwinding. (See issue 54332)
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MOVW R29, R29
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MOVW 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(stackArgsType *_type, f *FuncVal, stackArgs *byte, stackArgsSize, stackRetOffset, frameSize uint32, regArgs *abi.RegArgs).
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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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#define DISPATCH(NAME,MAXSIZE) \
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MOVW $MAXSIZE, R23; \
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SGTU R1, R23, R23; \
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BNE R23, 3(PC); \
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MOVW $NAME(SB), R4; \
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JMP (R4)
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TEXT ·reflectcall(SB),NOSPLIT|NOFRAME,$0-28
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MOVW frameSize+20(FP), R1
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DISPATCH(runtime·call16, 16)
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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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MOVW $runtime·badreflectcall(SB), R4
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JMP (R4)
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#define CALLFN(NAME,MAXSIZE) \
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TEXT NAME(SB),WRAPPER,$MAXSIZE-28; \
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NO_LOCAL_POINTERS; \
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/* copy arguments to stack */ \
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MOVW stackArgs+8(FP), R1; \
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MOVW stackArgsSize+12(FP), R2; \
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MOVW R29, R3; \
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ADDU $4, R3; \
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ADDU R3, R2; \
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BEQ R3, R2, 6(PC); \
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MOVBU (R1), R4; \
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ADDU $1, R1; \
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MOVBU R4, (R3); \
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ADDU $1, R3; \
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JMP -5(PC); \
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/* call function */ \
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MOVW f+4(FP), REGCTXT; \
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MOVW (REGCTXT), R4; \
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PCDATA $PCDATA_StackMapIndex, $0; \
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JAL (R4); \
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/* copy return values back */ \
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MOVW stackArgsType+0(FP), R5; \
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MOVW stackArgs+8(FP), R1; \
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MOVW stackArgsSize+12(FP), R2; \
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MOVW stackRetOffset+16(FP), R4; \
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ADDU $4, R29, R3; \
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ADDU R4, R3; \
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ADDU R4, R1; \
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SUBU R4, R2; \
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JAL callRet<>(SB); \
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RET
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// callRet copies return values back at the end of call*. This is a
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// separate function so it can allocate stack space for the arguments
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// to reflectcallmove. It does not follow the Go ABI; it expects its
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// arguments in registers.
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TEXT callRet<>(SB), NOSPLIT, $20-0
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MOVW R5, 4(R29)
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MOVW R1, 8(R29)
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MOVW R3, 12(R29)
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MOVW R2, 16(R29)
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MOVW $0, 20(R29)
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JAL runtime·reflectcallmove(SB)
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RET
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CALLFN(·call16, 16)
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CALLFN(·call32, 32)
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CALLFN(·call64, 64)
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CALLFN(·call128, 128)
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CALLFN(·call256, 256)
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CALLFN(·call512, 512)
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CALLFN(·call1024, 1024)
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CALLFN(·call2048, 2048)
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CALLFN(·call4096, 4096)
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CALLFN(·call8192, 8192)
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CALLFN(·call16384, 16384)
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CALLFN(·call32768, 32768)
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CALLFN(·call65536, 65536)
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CALLFN(·call131072, 131072)
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CALLFN(·call262144, 262144)
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CALLFN(·call524288, 524288)
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CALLFN(·call1048576, 1048576)
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CALLFN(·call2097152, 2097152)
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CALLFN(·call4194304, 4194304)
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CALLFN(·call8388608, 8388608)
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CALLFN(·call16777216, 16777216)
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CALLFN(·call33554432, 33554432)
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CALLFN(·call67108864, 67108864)
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CALLFN(·call134217728, 134217728)
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CALLFN(·call268435456, 268435456)
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CALLFN(·call536870912, 536870912)
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CALLFN(·call1073741824, 1073741824)
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TEXT runtime·procyield(SB),NOSPLIT,$0-4
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RET
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// Save state of caller into g->sched,
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// but using fake PC from systemstack_switch.
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// Must only be called from functions with no locals ($0)
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// or else unwinding from systemstack_switch is incorrect.
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// Smashes R1.
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TEXT gosave_systemstack_switch<>(SB),NOSPLIT|NOFRAME,$0
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MOVW $runtime·systemstack_switch(SB), R1
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ADDU $8, R1 // get past prologue
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MOVW R1, (g_sched+gobuf_pc)(g)
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MOVW R29, (g_sched+gobuf_sp)(g)
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MOVW R0, (g_sched+gobuf_lr)(g)
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MOVW R0, (g_sched+gobuf_ret)(g)
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// Assert ctxt is zero. See func save.
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MOVW (g_sched+gobuf_ctxt)(g), R1
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BEQ R1, 2(PC)
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JAL runtime·abort(SB)
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RET
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// func asmcgocall(fn, arg unsafe.Pointer) int32
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// Call fn(arg) on the scheduler stack,
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// aligned appropriately for the gcc ABI.
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// See cgocall.go for more details.
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TEXT ·asmcgocall(SB),NOSPLIT,$0-12
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MOVW fn+0(FP), R25
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MOVW arg+4(FP), R4
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MOVW R29, R3 // save original stack pointer
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MOVW g, R2
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// Figure out if we need to switch to m->g0 stack.
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// We get called to create new OS threads too, and those
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// come in on the m->g0 stack already. Or we might already
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// be on the m->gsignal stack.
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MOVW g_m(g), R5
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MOVW m_gsignal(R5), R6
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BEQ R6, g, g0
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MOVW m_g0(R5), R6
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BEQ R6, g, g0
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JAL gosave_systemstack_switch<>(SB)
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MOVW R6, g
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JAL runtime·save_g(SB)
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MOVW (g_sched+gobuf_sp)(g), R29
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// Now on a scheduling stack (a pthread-created stack).
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g0:
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// Save room for two of our pointers and O32 frame.
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ADDU $-24, R29
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AND $~7, R29 // O32 ABI expects 8-byte aligned stack on function entry
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MOVW R2, 16(R29) // save old g on stack
|
|
MOVW (g_stack+stack_hi)(R2), R2
|
|
SUBU R3, R2
|
|
MOVW R2, 20(R29) // 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. R2 is return value.
|
|
MOVW 16(R29), g
|
|
JAL runtime·save_g(SB)
|
|
MOVW (g_stack+stack_hi)(g), R5
|
|
MOVW 20(R29), R6
|
|
SUBU R6, R5
|
|
MOVW R5, R29
|
|
|
|
MOVW R2, ret+8(FP)
|
|
RET
|
|
|
|
// cgocallback(fn, frame unsafe.Pointer, ctxt uintptr)
|
|
// See cgocall.go for more details.
|
|
TEXT ·cgocallback(SB),NOSPLIT,$12-12
|
|
NO_LOCAL_POINTERS
|
|
|
|
// Skip cgocallbackg, just dropm when fn is nil, and frame is the saved g.
|
|
// It is used to dropm while thread is exiting.
|
|
MOVW fn+0(FP), R5
|
|
BNE R5, loadg
|
|
// Restore the g from frame.
|
|
MOVW frame+4(FP), g
|
|
JMP dropm
|
|
|
|
loadg:
|
|
// Load m and g from thread-local storage.
|
|
MOVB runtime·iscgo(SB), R1
|
|
BEQ R1, nocgo
|
|
JAL runtime·load_g(SB)
|
|
nocgo:
|
|
|
|
// If g is nil, Go did not create the current thread,
|
|
// or if this thread never called into Go on pthread platforms.
|
|
// 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
|
|
|
|
MOVW g_m(g), R3
|
|
MOVW R3, savedm-4(SP)
|
|
JMP havem
|
|
|
|
needm:
|
|
MOVW g, savedm-4(SP) // g is zero, so is m.
|
|
MOVW $runtime·needAndBindM(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.
|
|
MOVW g_m(g), R3
|
|
MOVW m_g0(R3), R1
|
|
MOVW R29, (g_sched+gobuf_sp)(R1)
|
|
|
|
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 4(R29) aka savedsp-8(SP).
|
|
MOVW m_g0(R3), R1
|
|
MOVW (g_sched+gobuf_sp)(R1), R2
|
|
MOVW R2, savedsp-12(SP) // must match frame size
|
|
MOVW R29, (g_sched+gobuf_sp)(R1)
|
|
|
|
// 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 curg stack and
|
|
// open a frame the same size as cgocallback's g0 frame.
|
|
// Once we switch to the curg stack, the pushed PC will appear
|
|
// to be the return PC of cgocallback, so that the traceback
|
|
// will seamlessly trace back into the earlier calls.
|
|
MOVW m_curg(R3), g
|
|
JAL runtime·save_g(SB)
|
|
MOVW (g_sched+gobuf_sp)(g), R2 // prepare stack as R2
|
|
MOVW (g_sched+gobuf_pc)(g), R4
|
|
MOVW R4, -(12+4)(R2) // "saved LR"; must match frame size
|
|
// Gather our arguments into registers.
|
|
MOVW fn+0(FP), R5
|
|
MOVW frame+4(FP), R6
|
|
MOVW ctxt+8(FP), R7
|
|
MOVW $-(12+4)(R2), R29 // switch stack; must match frame size
|
|
MOVW R5, 4(R29)
|
|
MOVW R6, 8(R29)
|
|
MOVW R7, 12(R29)
|
|
JAL runtime·cgocallbackg(SB)
|
|
|
|
// Restore g->sched (== m->curg->sched) from saved values.
|
|
MOVW 0(R29), R4
|
|
MOVW R4, (g_sched+gobuf_pc)(g)
|
|
MOVW $(12+4)(R29), R2 // must match frame size
|
|
MOVW R2, (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.)
|
|
MOVW g_m(g), R3
|
|
MOVW m_g0(R3), g
|
|
JAL runtime·save_g(SB)
|
|
MOVW (g_sched+gobuf_sp)(g), R29
|
|
MOVW savedsp-12(SP), R2 // must match frame size
|
|
MOVW R2, (g_sched+gobuf_sp)(g)
|
|
|
|
// If the m on entry was nil, we called needm above to borrow an m,
|
|
// 1. for the duration of the call on non-pthread platforms,
|
|
// 2. or the duration of the C thread alive on pthread platforms.
|
|
// If the m on entry wasn't nil,
|
|
// 1. the thread might be a Go thread,
|
|
// 2. or it wasn't the first call from a C thread on pthread platforms,
|
|
// since then we skip dropm to reuse the m in the first call.
|
|
MOVW savedm-4(SP), R3
|
|
BNE R3, droppedm
|
|
|
|
// Skip dropm to reuse it in the next call, when a pthread key has been created.
|
|
MOVW _cgo_pthread_key_created(SB), R3
|
|
// It means cgo is disabled when _cgo_pthread_key_created is a nil pointer, need dropm.
|
|
BEQ R3, dropm
|
|
MOVW (R3), R3
|
|
BNE R3, droppedm
|
|
|
|
dropm:
|
|
MOVW $runtime·dropm(SB), R4
|
|
JAL (R4)
|
|
droppedm:
|
|
|
|
// Done!
|
|
RET
|
|
|
|
// void setg(G*); set g. for use by needm.
|
|
// This only happens if iscgo, so jump straight to save_g
|
|
TEXT runtime·setg(SB),NOSPLIT,$0-4
|
|
MOVW gg+0(FP), g
|
|
JAL runtime·save_g(SB)
|
|
RET
|
|
|
|
// void setg_gcc(G*); set g in C TLS.
|
|
// Must obey the gcc calling convention.
|
|
TEXT setg_gcc<>(SB),NOSPLIT,$0
|
|
MOVW R4, g
|
|
JAL runtime·save_g(SB)
|
|
RET
|
|
|
|
TEXT runtime·abort(SB),NOSPLIT,$0-0
|
|
UNDEF
|
|
|
|
// AES hashing not implemented for mips
|
|
TEXT runtime·memhash(SB),NOSPLIT|NOFRAME,$0-16
|
|
JMP runtime·memhashFallback(SB)
|
|
TEXT runtime·strhash(SB),NOSPLIT|NOFRAME,$0-12
|
|
JMP runtime·strhashFallback(SB)
|
|
TEXT runtime·memhash32(SB),NOSPLIT|NOFRAME,$0-12
|
|
JMP runtime·memhash32Fallback(SB)
|
|
TEXT runtime·memhash64(SB),NOSPLIT|NOFRAME,$0-12
|
|
JMP runtime·memhash64Fallback(SB)
|
|
|
|
TEXT runtime·return0(SB),NOSPLIT,$0
|
|
MOVW $0, R1
|
|
RET
|
|
|
|
// Called from cgo wrappers, this function returns g->m->curg.stack.hi.
|
|
// Must obey the gcc calling convention.
|
|
TEXT _cgo_topofstack(SB),NOSPLIT|NOFRAME,$0
|
|
// g (R30), R3 and REGTMP (R23) might be clobbered by load_g. R30 and R23
|
|
// are callee-save in the gcc calling convention, so save them.
|
|
MOVW R23, R8
|
|
MOVW g, R9
|
|
MOVW R31, R10 // this call frame does not save LR
|
|
|
|
JAL runtime·load_g(SB)
|
|
MOVW g_m(g), R1
|
|
MOVW m_curg(R1), R1
|
|
MOVW (g_stack+stack_hi)(R1), R2 // return value in R2
|
|
|
|
MOVW R8, R23
|
|
MOVW R9, g
|
|
MOVW R10, R31
|
|
|
|
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, R1
|
|
MOVB R1, ret+0(FP)
|
|
RET
|
|
|
|
// gcWriteBarrier informs the GC about heap pointer writes.
|
|
//
|
|
// gcWriteBarrier does NOT follow the Go ABI. It accepts the
|
|
// number of bytes of buffer needed in R25, and returns a pointer
|
|
// to the buffer space in R25.
|
|
// It clobbers R23 (the linker temp register).
|
|
// The act of CALLing gcWriteBarrier will clobber R31 (LR).
|
|
// It does not clobber any other general-purpose registers,
|
|
// but may clobber others (e.g., floating point registers).
|
|
TEXT gcWriteBarrier<>(SB),NOSPLIT,$104
|
|
// Save the registers clobbered by the fast path.
|
|
MOVW R1, 100(R29)
|
|
MOVW R2, 104(R29)
|
|
retry:
|
|
MOVW g_m(g), R1
|
|
MOVW m_p(R1), R1
|
|
MOVW (p_wbBuf+wbBuf_next)(R1), R2
|
|
MOVW (p_wbBuf+wbBuf_end)(R1), R23 // R23 is linker temp register
|
|
// Increment wbBuf.next position.
|
|
ADD R25, R2
|
|
// Is the buffer full?
|
|
SGTU R2, R23, R23
|
|
BNE R23, flush
|
|
// Commit to the larger buffer.
|
|
MOVW R2, (p_wbBuf+wbBuf_next)(R1)
|
|
// Make return value (the original next position)
|
|
SUB R25, R2, R25
|
|
// Restore registers.
|
|
MOVW 100(R29), R1
|
|
MOVW 104(R29), R2
|
|
RET
|
|
|
|
flush:
|
|
// Save all general purpose registers since these could be
|
|
// clobbered by wbBufFlush and were not saved by the caller.
|
|
MOVW R20, 4(R29)
|
|
MOVW R21, 8(R29)
|
|
// R1 already saved
|
|
// R2 already saved
|
|
MOVW R3, 12(R29)
|
|
MOVW R4, 16(R29)
|
|
MOVW R5, 20(R29)
|
|
MOVW R6, 24(R29)
|
|
MOVW R7, 28(R29)
|
|
MOVW R8, 32(R29)
|
|
MOVW R9, 36(R29)
|
|
MOVW R10, 40(R29)
|
|
MOVW R11, 44(R29)
|
|
MOVW R12, 48(R29)
|
|
MOVW R13, 52(R29)
|
|
MOVW R14, 56(R29)
|
|
MOVW R15, 60(R29)
|
|
MOVW R16, 64(R29)
|
|
MOVW R17, 68(R29)
|
|
MOVW R18, 72(R29)
|
|
MOVW R19, 76(R29)
|
|
MOVW R20, 80(R29)
|
|
// R21 already saved
|
|
// R22 already saved.
|
|
MOVW R22, 84(R29)
|
|
// R23 is tmp register.
|
|
MOVW R24, 88(R29)
|
|
MOVW R25, 92(R29)
|
|
// R26 is reserved by kernel.
|
|
// R27 is reserved by kernel.
|
|
MOVW R28, 96(R29)
|
|
// R29 is SP.
|
|
// R30 is g.
|
|
// R31 is LR, which was saved by the prologue.
|
|
|
|
CALL runtime·wbBufFlush(SB)
|
|
|
|
MOVW 4(R29), R20
|
|
MOVW 8(R29), R21
|
|
MOVW 12(R29), R3
|
|
MOVW 16(R29), R4
|
|
MOVW 20(R29), R5
|
|
MOVW 24(R29), R6
|
|
MOVW 28(R29), R7
|
|
MOVW 32(R29), R8
|
|
MOVW 36(R29), R9
|
|
MOVW 40(R29), R10
|
|
MOVW 44(R29), R11
|
|
MOVW 48(R29), R12
|
|
MOVW 52(R29), R13
|
|
MOVW 56(R29), R14
|
|
MOVW 60(R29), R15
|
|
MOVW 64(R29), R16
|
|
MOVW 68(R29), R17
|
|
MOVW 72(R29), R18
|
|
MOVW 76(R29), R19
|
|
MOVW 80(R29), R20
|
|
MOVW 84(R29), R22
|
|
MOVW 88(R29), R24
|
|
MOVW 92(R29), R25
|
|
MOVW 96(R29), R28
|
|
JMP retry
|
|
|
|
TEXT runtime·gcWriteBarrier1<ABIInternal>(SB),NOSPLIT,$0
|
|
MOVW $4, R25
|
|
JMP gcWriteBarrier<>(SB)
|
|
TEXT runtime·gcWriteBarrier2<ABIInternal>(SB),NOSPLIT,$0
|
|
MOVW $8, R25
|
|
JMP gcWriteBarrier<>(SB)
|
|
TEXT runtime·gcWriteBarrier3<ABIInternal>(SB),NOSPLIT,$0
|
|
MOVW $12, R25
|
|
JMP gcWriteBarrier<>(SB)
|
|
TEXT runtime·gcWriteBarrier4<ABIInternal>(SB),NOSPLIT,$0
|
|
MOVW $16, R25
|
|
JMP gcWriteBarrier<>(SB)
|
|
TEXT runtime·gcWriteBarrier5<ABIInternal>(SB),NOSPLIT,$0
|
|
MOVW $20, R25
|
|
JMP gcWriteBarrier<>(SB)
|
|
TEXT runtime·gcWriteBarrier6<ABIInternal>(SB),NOSPLIT,$0
|
|
MOVW $24, R25
|
|
JMP gcWriteBarrier<>(SB)
|
|
TEXT runtime·gcWriteBarrier7<ABIInternal>(SB),NOSPLIT,$0
|
|
MOVW $28, R25
|
|
JMP gcWriteBarrier<>(SB)
|
|
TEXT runtime·gcWriteBarrier8<ABIInternal>(SB),NOSPLIT,$0
|
|
MOVW $32, R25
|
|
JMP gcWriteBarrier<>(SB)
|
|
|
|
// 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,$0-8
|
|
MOVW R1, x+0(FP)
|
|
MOVW R2, y+4(FP)
|
|
JMP runtime·goPanicIndex(SB)
|
|
TEXT runtime·panicIndexU(SB),NOSPLIT,$0-8
|
|
MOVW R1, x+0(FP)
|
|
MOVW R2, y+4(FP)
|
|
JMP runtime·goPanicIndexU(SB)
|
|
TEXT runtime·panicSliceAlen(SB),NOSPLIT,$0-8
|
|
MOVW R2, x+0(FP)
|
|
MOVW R3, y+4(FP)
|
|
JMP runtime·goPanicSliceAlen(SB)
|
|
TEXT runtime·panicSliceAlenU(SB),NOSPLIT,$0-8
|
|
MOVW R2, x+0(FP)
|
|
MOVW R3, y+4(FP)
|
|
JMP runtime·goPanicSliceAlenU(SB)
|
|
TEXT runtime·panicSliceAcap(SB),NOSPLIT,$0-8
|
|
MOVW R2, x+0(FP)
|
|
MOVW R3, y+4(FP)
|
|
JMP runtime·goPanicSliceAcap(SB)
|
|
TEXT runtime·panicSliceAcapU(SB),NOSPLIT,$0-8
|
|
MOVW R2, x+0(FP)
|
|
MOVW R3, y+4(FP)
|
|
JMP runtime·goPanicSliceAcapU(SB)
|
|
TEXT runtime·panicSliceB(SB),NOSPLIT,$0-8
|
|
MOVW R1, x+0(FP)
|
|
MOVW R2, y+4(FP)
|
|
JMP runtime·goPanicSliceB(SB)
|
|
TEXT runtime·panicSliceBU(SB),NOSPLIT,$0-8
|
|
MOVW R1, x+0(FP)
|
|
MOVW R2, y+4(FP)
|
|
JMP runtime·goPanicSliceBU(SB)
|
|
TEXT runtime·panicSlice3Alen(SB),NOSPLIT,$0-8
|
|
MOVW R3, x+0(FP)
|
|
MOVW R4, y+4(FP)
|
|
JMP runtime·goPanicSlice3Alen(SB)
|
|
TEXT runtime·panicSlice3AlenU(SB),NOSPLIT,$0-8
|
|
MOVW R3, x+0(FP)
|
|
MOVW R4, y+4(FP)
|
|
JMP runtime·goPanicSlice3AlenU(SB)
|
|
TEXT runtime·panicSlice3Acap(SB),NOSPLIT,$0-8
|
|
MOVW R3, x+0(FP)
|
|
MOVW R4, y+4(FP)
|
|
JMP runtime·goPanicSlice3Acap(SB)
|
|
TEXT runtime·panicSlice3AcapU(SB),NOSPLIT,$0-8
|
|
MOVW R3, x+0(FP)
|
|
MOVW R4, y+4(FP)
|
|
JMP runtime·goPanicSlice3AcapU(SB)
|
|
TEXT runtime·panicSlice3B(SB),NOSPLIT,$0-8
|
|
MOVW R2, x+0(FP)
|
|
MOVW R3, y+4(FP)
|
|
JMP runtime·goPanicSlice3B(SB)
|
|
TEXT runtime·panicSlice3BU(SB),NOSPLIT,$0-8
|
|
MOVW R2, x+0(FP)
|
|
MOVW R3, y+4(FP)
|
|
JMP runtime·goPanicSlice3BU(SB)
|
|
TEXT runtime·panicSlice3C(SB),NOSPLIT,$0-8
|
|
MOVW R1, x+0(FP)
|
|
MOVW R2, y+4(FP)
|
|
JMP runtime·goPanicSlice3C(SB)
|
|
TEXT runtime·panicSlice3CU(SB),NOSPLIT,$0-8
|
|
MOVW R1, x+0(FP)
|
|
MOVW R2, y+4(FP)
|
|
JMP runtime·goPanicSlice3CU(SB)
|
|
TEXT runtime·panicSliceConvert(SB),NOSPLIT,$0-8
|
|
MOVW R3, x+0(FP)
|
|
MOVW R4, y+4(FP)
|
|
JMP runtime·goPanicSliceConvert(SB)
|
|
|
|
// Extended versions for 64-bit indexes.
|
|
TEXT runtime·panicExtendIndex(SB),NOSPLIT,$0-12
|
|
MOVW R5, hi+0(FP)
|
|
MOVW R1, lo+4(FP)
|
|
MOVW R2, y+8(FP)
|
|
JMP runtime·goPanicExtendIndex(SB)
|
|
TEXT runtime·panicExtendIndexU(SB),NOSPLIT,$0-12
|
|
MOVW R5, hi+0(FP)
|
|
MOVW R1, lo+4(FP)
|
|
MOVW R2, y+8(FP)
|
|
JMP runtime·goPanicExtendIndexU(SB)
|
|
TEXT runtime·panicExtendSliceAlen(SB),NOSPLIT,$0-12
|
|
MOVW R5, hi+0(FP)
|
|
MOVW R2, lo+4(FP)
|
|
MOVW R3, y+8(FP)
|
|
JMP runtime·goPanicExtendSliceAlen(SB)
|
|
TEXT runtime·panicExtendSliceAlenU(SB),NOSPLIT,$0-12
|
|
MOVW R5, hi+0(FP)
|
|
MOVW R2, lo+4(FP)
|
|
MOVW R3, y+8(FP)
|
|
JMP runtime·goPanicExtendSliceAlenU(SB)
|
|
TEXT runtime·panicExtendSliceAcap(SB),NOSPLIT,$0-12
|
|
MOVW R5, hi+0(FP)
|
|
MOVW R2, lo+4(FP)
|
|
MOVW R3, y+8(FP)
|
|
JMP runtime·goPanicExtendSliceAcap(SB)
|
|
TEXT runtime·panicExtendSliceAcapU(SB),NOSPLIT,$0-12
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MOVW R5, hi+0(FP)
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MOVW R2, lo+4(FP)
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MOVW R3, y+8(FP)
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JMP runtime·goPanicExtendSliceAcapU(SB)
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TEXT runtime·panicExtendSliceB(SB),NOSPLIT,$0-12
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MOVW R5, hi+0(FP)
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MOVW R1, lo+4(FP)
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MOVW R2, y+8(FP)
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JMP runtime·goPanicExtendSliceB(SB)
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TEXT runtime·panicExtendSliceBU(SB),NOSPLIT,$0-12
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MOVW R5, hi+0(FP)
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MOVW R1, lo+4(FP)
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MOVW R2, y+8(FP)
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JMP runtime·goPanicExtendSliceBU(SB)
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TEXT runtime·panicExtendSlice3Alen(SB),NOSPLIT,$0-12
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MOVW R5, hi+0(FP)
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MOVW R3, lo+4(FP)
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MOVW R4, y+8(FP)
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JMP runtime·goPanicExtendSlice3Alen(SB)
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TEXT runtime·panicExtendSlice3AlenU(SB),NOSPLIT,$0-12
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MOVW R5, hi+0(FP)
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MOVW R3, lo+4(FP)
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MOVW R4, y+8(FP)
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JMP runtime·goPanicExtendSlice3AlenU(SB)
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TEXT runtime·panicExtendSlice3Acap(SB),NOSPLIT,$0-12
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MOVW R5, hi+0(FP)
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MOVW R3, lo+4(FP)
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MOVW R4, y+8(FP)
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JMP runtime·goPanicExtendSlice3Acap(SB)
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TEXT runtime·panicExtendSlice3AcapU(SB),NOSPLIT,$0-12
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MOVW R5, hi+0(FP)
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MOVW R3, lo+4(FP)
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MOVW R4, y+8(FP)
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JMP runtime·goPanicExtendSlice3AcapU(SB)
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TEXT runtime·panicExtendSlice3B(SB),NOSPLIT,$0-12
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MOVW R5, hi+0(FP)
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MOVW R2, lo+4(FP)
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MOVW R3, y+8(FP)
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JMP runtime·goPanicExtendSlice3B(SB)
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TEXT runtime·panicExtendSlice3BU(SB),NOSPLIT,$0-12
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MOVW R5, hi+0(FP)
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MOVW R2, lo+4(FP)
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MOVW R3, y+8(FP)
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JMP runtime·goPanicExtendSlice3BU(SB)
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TEXT runtime·panicExtendSlice3C(SB),NOSPLIT,$0-12
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MOVW R5, hi+0(FP)
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MOVW R1, lo+4(FP)
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MOVW R2, y+8(FP)
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JMP runtime·goPanicExtendSlice3C(SB)
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TEXT runtime·panicExtendSlice3CU(SB),NOSPLIT,$0-12
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MOVW R5, hi+0(FP)
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MOVW R1, lo+4(FP)
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MOVW R2, y+8(FP)
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JMP runtime·goPanicExtendSlice3CU(SB)
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