mirror of
https://github.com/golang/go
synced 2024-11-06 09:26:18 -07:00
cb6fc99b32
This extends CL 402190 from Linux to the rest of the Unix OSes. Marking sigtramp as TOPFRAME allows gentraceback to stop tracebacks at the end of a signal handler, since there is not much beyond sigtramp. Change-Id: I8b7f5d55d41889f59c0a79c65351b9b0b2d77717 Reviewed-on: https://go-review.googlesource.com/c/go/+/402934 Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Austin Clements <austin@google.com> Auto-Submit: Michael Pratt <mpratt@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Michael Pratt <mpratt@google.com>
642 lines
15 KiB
ArmAsm
642 lines
15 KiB
ArmAsm
// Copyright 2019 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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//
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// System calls and other sys.stuff for arm64, OpenBSD
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// System calls are implemented in libc/libpthread, this file
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// contains trampolines that convert from Go to C calling convention.
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// Some direct system call implementations currently remain.
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//
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#include "go_asm.h"
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#include "go_tls.h"
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#include "textflag.h"
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#include "cgo/abi_arm64.h"
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#define CLOCK_REALTIME $0
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#define CLOCK_MONOTONIC $3
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// mstart_stub is the first function executed on a new thread started by pthread_create.
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// It just does some low-level setup and then calls mstart.
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// Note: called with the C calling convention.
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TEXT runtime·mstart_stub(SB),NOSPLIT,$144
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// R0 points to the m.
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// We are already on m's g0 stack.
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// Save callee-save registers.
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SAVE_R19_TO_R28(8)
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SAVE_F8_TO_F15(88)
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MOVD m_g0(R0), g
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BL runtime·save_g(SB)
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BL runtime·mstart(SB)
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// Restore callee-save registers.
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RESTORE_R19_TO_R28(8)
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RESTORE_F8_TO_F15(88)
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// Go is all done with this OS thread.
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// Tell pthread everything is ok (we never join with this thread, so
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// the value here doesn't really matter).
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MOVD $0, R0
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RET
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TEXT runtime·sigfwd(SB),NOSPLIT,$0-32
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MOVW sig+8(FP), R0
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MOVD info+16(FP), R1
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MOVD ctx+24(FP), R2
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MOVD fn+0(FP), R11
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BL (R11) // Alignment for ELF ABI?
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RET
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TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME,$192
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// Save callee-save registers in the case of signal forwarding.
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// Please refer to https://golang.org/issue/31827 .
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SAVE_R19_TO_R28(8*4)
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SAVE_F8_TO_F15(8*14)
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// If called from an external code context, g will not be set.
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// Save R0, since runtime·load_g will clobber it.
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MOVW R0, 8(RSP) // signum
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BL runtime·load_g(SB)
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#ifdef GOEXPERIMENT_regabiargs
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// Restore signum to R0.
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MOVW 8(RSP), R0
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// R1 and R2 already contain info and ctx, respectively.
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#else
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MOVD R1, 16(RSP)
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MOVD R2, 24(RSP)
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#endif
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BL runtime·sigtrampgo<ABIInternal>(SB)
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// Restore callee-save registers.
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RESTORE_R19_TO_R28(8*4)
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RESTORE_F8_TO_F15(8*14)
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RET
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//
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// These trampolines help convert from Go calling convention to C calling convention.
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// They should be called with asmcgocall.
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// A pointer to the arguments is passed in R0.
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// A single int32 result is returned in R0.
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// (For more results, make an args/results structure.)
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TEXT runtime·pthread_attr_init_trampoline(SB),NOSPLIT,$0
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MOVD 0(R0), R0 // arg 1 - attr
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CALL libc_pthread_attr_init(SB)
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RET
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TEXT runtime·pthread_attr_destroy_trampoline(SB),NOSPLIT,$0
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MOVD 0(R0), R0 // arg 1 - attr
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CALL libc_pthread_attr_destroy(SB)
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RET
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TEXT runtime·pthread_attr_getstacksize_trampoline(SB),NOSPLIT,$0
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MOVD 8(R0), R1 // arg 2 - size
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MOVD 0(R0), R0 // arg 1 - attr
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CALL libc_pthread_attr_getstacksize(SB)
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RET
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TEXT runtime·pthread_attr_setdetachstate_trampoline(SB),NOSPLIT,$0
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MOVD 8(R0), R1 // arg 2 - state
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MOVD 0(R0), R0 // arg 1 - attr
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CALL libc_pthread_attr_setdetachstate(SB)
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RET
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TEXT runtime·pthread_create_trampoline(SB),NOSPLIT,$0
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MOVD 0(R0), R1 // arg 2 - attr
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MOVD 8(R0), R2 // arg 3 - start
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MOVD 16(R0), R3 // arg 4 - arg
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SUB $16, RSP
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MOVD RSP, R0 // arg 1 - &threadid (discard)
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CALL libc_pthread_create(SB)
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ADD $16, RSP
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RET
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TEXT runtime·thrkill_trampoline(SB),NOSPLIT,$0
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MOVW 8(R0), R1 // arg 2 - signal
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MOVD $0, R2 // arg 3 - tcb
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MOVW 0(R0), R0 // arg 1 - tid
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CALL libc_thrkill(SB)
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RET
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TEXT runtime·thrsleep_trampoline(SB),NOSPLIT,$0
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MOVW 8(R0), R1 // arg 2 - clock_id
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MOVD 16(R0), R2 // arg 3 - abstime
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MOVD 24(R0), R3 // arg 4 - lock
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MOVD 32(R0), R4 // arg 5 - abort
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MOVD 0(R0), R0 // arg 1 - id
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CALL libc_thrsleep(SB)
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RET
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TEXT runtime·thrwakeup_trampoline(SB),NOSPLIT,$0
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MOVW 8(R0), R1 // arg 2 - count
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MOVD 0(R0), R0 // arg 1 - id
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CALL libc_thrwakeup(SB)
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RET
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TEXT runtime·exit_trampoline(SB),NOSPLIT,$0
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MOVW 0(R0), R0 // arg 1 - status
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CALL libc_exit(SB)
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MOVD $0, R0 // crash on failure
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MOVD R0, (R0)
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RET
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TEXT runtime·getthrid_trampoline(SB),NOSPLIT,$0
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MOVD R0, R19 // pointer to args
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CALL libc_getthrid(SB)
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MOVW R0, 0(R19) // return value
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RET
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TEXT runtime·raiseproc_trampoline(SB),NOSPLIT,$0
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MOVD R0, R19 // pointer to args
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CALL libc_getpid(SB) // arg 1 - pid
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MOVW 0(R19), R1 // arg 2 - signal
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CALL libc_kill(SB)
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RET
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TEXT runtime·sched_yield_trampoline(SB),NOSPLIT,$0
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CALL libc_sched_yield(SB)
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RET
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TEXT runtime·mmap_trampoline(SB),NOSPLIT,$0
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MOVD R0, R19 // pointer to args
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MOVD 0(R19), R0 // arg 1 - addr
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MOVD 8(R19), R1 // arg 2 - len
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MOVW 16(R19), R2 // arg 3 - prot
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MOVW 20(R19), R3 // arg 4 - flags
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MOVW 24(R19), R4 // arg 5 - fid
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MOVW 28(R19), R5 // arg 6 - offset
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CALL libc_mmap(SB)
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MOVD $0, R1
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CMP $-1, R0
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BNE noerr
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CALL libc_errno(SB)
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MOVW (R0), R1 // errno
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MOVD $0, R0
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noerr:
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MOVD R0, 32(R19)
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MOVD R1, 40(R19)
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RET
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TEXT runtime·munmap_trampoline(SB),NOSPLIT,$0
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MOVD 8(R0), R1 // arg 2 - len
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MOVD 0(R0), R0 // arg 1 - addr
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CALL libc_munmap(SB)
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CMP $-1, R0
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BNE 3(PC)
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MOVD $0, R0 // crash on failure
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MOVD R0, (R0)
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RET
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TEXT runtime·madvise_trampoline(SB), NOSPLIT, $0
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MOVD 8(R0), R1 // arg 2 - len
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MOVW 16(R0), R2 // arg 3 - advice
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MOVD 0(R0), R0 // arg 1 - addr
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CALL libc_madvise(SB)
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// ignore failure - maybe pages are locked
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RET
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TEXT runtime·open_trampoline(SB),NOSPLIT,$0
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MOVW 8(R0), R1 // arg 2 - flags
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MOVW 12(R0), R2 // arg 3 - mode
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MOVD 0(R0), R0 // arg 1 - path
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MOVD $0, R3 // varargs
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CALL libc_open(SB)
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RET
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TEXT runtime·close_trampoline(SB),NOSPLIT,$0
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MOVD 0(R0), R0 // arg 1 - fd
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CALL libc_close(SB)
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RET
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TEXT runtime·read_trampoline(SB),NOSPLIT,$0
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MOVD 8(R0), R1 // arg 2 - buf
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MOVW 16(R0), R2 // arg 3 - count
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MOVW 0(R0), R0 // arg 1 - fd
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CALL libc_read(SB)
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CMP $-1, R0
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BNE noerr
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CALL libc_errno(SB)
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MOVW (R0), R0 // errno
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NEG R0, R0 // caller expects negative errno value
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noerr:
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RET
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TEXT runtime·write_trampoline(SB),NOSPLIT,$0
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MOVD 8(R0), R1 // arg 2 - buf
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MOVW 16(R0), R2 // arg 3 - count
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MOVW 0(R0), R0 // arg 1 - fd
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CALL libc_write(SB)
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CMP $-1, R0
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BNE noerr
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CALL libc_errno(SB)
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MOVW (R0), R0 // errno
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NEG R0, R0 // caller expects negative errno value
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noerr:
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RET
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TEXT runtime·pipe2_trampoline(SB),NOSPLIT,$0
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MOVW 8(R0), R1 // arg 2 - flags
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MOVD 0(R0), R0 // arg 1 - filedes
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CALL libc_pipe2(SB)
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CMP $-1, R0
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BNE noerr
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CALL libc_errno(SB)
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MOVW (R0), R0 // errno
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NEG R0, R0 // caller expects negative errno value
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noerr:
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RET
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TEXT runtime·setitimer_trampoline(SB),NOSPLIT,$0
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MOVD 8(R0), R1 // arg 2 - new
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MOVD 16(R0), R2 // arg 3 - old
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MOVW 0(R0), R0 // arg 1 - which
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CALL libc_setitimer(SB)
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RET
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TEXT runtime·usleep_trampoline(SB),NOSPLIT,$0
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MOVD 0(R0), R0 // arg 1 - usec
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CALL libc_usleep(SB)
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RET
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TEXT runtime·sysctl_trampoline(SB),NOSPLIT,$0
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MOVW 8(R0), R1 // arg 2 - miblen
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MOVD 16(R0), R2 // arg 3 - out
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MOVD 24(R0), R3 // arg 4 - size
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MOVD 32(R0), R4 // arg 5 - dst
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MOVD 40(R0), R5 // arg 6 - ndst
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MOVD 0(R0), R0 // arg 1 - mib
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CALL libc_sysctl(SB)
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RET
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TEXT runtime·kqueue_trampoline(SB),NOSPLIT,$0
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CALL libc_kqueue(SB)
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RET
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TEXT runtime·kevent_trampoline(SB),NOSPLIT,$0
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MOVD 8(R0), R1 // arg 2 - keventt
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MOVW 16(R0), R2 // arg 3 - nch
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MOVD 24(R0), R3 // arg 4 - ev
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MOVW 32(R0), R4 // arg 5 - nev
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MOVD 40(R0), R5 // arg 6 - ts
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MOVW 0(R0), R0 // arg 1 - kq
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CALL libc_kevent(SB)
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CMP $-1, R0
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BNE noerr
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CALL libc_errno(SB)
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MOVW (R0), R0 // errno
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NEG R0, R0 // caller expects negative errno value
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noerr:
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RET
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TEXT runtime·clock_gettime_trampoline(SB),NOSPLIT,$0
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MOVD 8(R0), R1 // arg 2 - tp
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MOVD 0(R0), R0 // arg 1 - clock_id
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CALL libc_clock_gettime(SB)
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CMP $-1, R0
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BNE noerr
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CALL libc_errno(SB)
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MOVW (R0), R0 // errno
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NEG R0, R0 // caller expects negative errno value
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noerr:
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RET
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TEXT runtime·fcntl_trampoline(SB),NOSPLIT,$0
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MOVW 4(R0), R1 // arg 2 - cmd
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MOVW 8(R0), R2 // arg 3 - arg
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MOVW 0(R0), R0 // arg 1 - fd
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MOVD $0, R3 // vararg
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CALL libc_fcntl(SB)
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RET
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TEXT runtime·sigaction_trampoline(SB),NOSPLIT,$0
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MOVD 8(R0), R1 // arg 2 - new
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MOVD 16(R0), R2 // arg 3 - old
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MOVW 0(R0), R0 // arg 1 - sig
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CALL libc_sigaction(SB)
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CMP $-1, R0
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BNE 3(PC)
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MOVD $0, R0 // crash on syscall failure
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MOVD R0, (R0)
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RET
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TEXT runtime·sigprocmask_trampoline(SB),NOSPLIT,$0
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MOVD 8(R0), R1 // arg 2 - new
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MOVD 16(R0), R2 // arg 3 - old
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MOVW 0(R0), R0 // arg 1 - how
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CALL libc_pthread_sigmask(SB)
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CMP $-1, R0
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BNE 3(PC)
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MOVD $0, R0 // crash on syscall failure
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MOVD R0, (R0)
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RET
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TEXT runtime·sigaltstack_trampoline(SB),NOSPLIT,$0
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MOVD 8(R0), R1 // arg 2 - old
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MOVD 0(R0), R0 // arg 1 - new
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CALL libc_sigaltstack(SB)
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CMP $-1, R0
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BNE 3(PC)
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MOVD $0, R0 // crash on syscall failure
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MOVD R0, (R0)
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RET
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// syscall calls a function in libc on behalf of the syscall package.
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// syscall takes a pointer to a struct like:
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// struct {
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// fn uintptr
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// a1 uintptr
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// a2 uintptr
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// a3 uintptr
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// r1 uintptr
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// r2 uintptr
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// err uintptr
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// }
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// syscall must be called on the g0 stack with the
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// C calling convention (use libcCall).
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//
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// syscall expects a 32-bit result and tests for 32-bit -1
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// to decide there was an error.
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TEXT runtime·syscall(SB),NOSPLIT,$0
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MOVD R0, R19 // pointer to args
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MOVD (0*8)(R19), R11 // fn
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MOVD (1*8)(R19), R0 // a1
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MOVD (2*8)(R19), R1 // a2
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MOVD (3*8)(R19), R2 // a3
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MOVD $0, R3 // vararg
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CALL R11
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MOVD R0, (4*8)(R19) // r1
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MOVD R1, (5*8)(R19) // r2
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// Standard libc functions return -1 on error
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// and set errno.
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CMPW $-1, R0
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BNE ok
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// Get error code from libc.
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CALL libc_errno(SB)
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MOVW (R0), R0
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MOVD R0, (6*8)(R19) // err
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ok:
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RET
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// syscallX calls a function in libc on behalf of the syscall package.
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// syscallX takes a pointer to a struct like:
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// struct {
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// fn uintptr
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// a1 uintptr
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// a2 uintptr
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// a3 uintptr
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// r1 uintptr
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// r2 uintptr
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// err uintptr
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// }
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// syscallX must be called on the g0 stack with the
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// C calling convention (use libcCall).
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//
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// syscallX is like syscall but expects a 64-bit result
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// and tests for 64-bit -1 to decide there was an error.
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TEXT runtime·syscallX(SB),NOSPLIT,$0
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MOVD R0, R19 // pointer to args
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MOVD (0*8)(R19), R11 // fn
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MOVD (1*8)(R19), R0 // a1
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MOVD (2*8)(R19), R1 // a2
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MOVD (3*8)(R19), R2 // a3
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MOVD $0, R3 // vararg
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CALL R11
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MOVD R0, (4*8)(R19) // r1
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MOVD R1, (5*8)(R19) // r2
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// Standard libc functions return -1 on error
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// and set errno.
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CMP $-1, R0
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BNE ok
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// Get error code from libc.
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CALL libc_errno(SB)
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MOVW (R0), R0
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MOVD R0, (6*8)(R19) // err
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ok:
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RET
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// syscall6 calls a function in libc on behalf of the syscall package.
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// syscall6 takes a pointer to a struct like:
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// struct {
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// fn uintptr
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// a1 uintptr
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// a2 uintptr
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// a3 uintptr
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// a4 uintptr
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// a5 uintptr
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// a6 uintptr
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// r1 uintptr
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// r2 uintptr
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// err uintptr
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// }
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// syscall6 must be called on the g0 stack with the
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// C calling convention (use libcCall).
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//
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// syscall6 expects a 32-bit result and tests for 32-bit -1
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// to decide there was an error.
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TEXT runtime·syscall6(SB),NOSPLIT,$0
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MOVD R0, R19 // pointer to args
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MOVD (0*8)(R19), R11 // fn
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MOVD (1*8)(R19), R0 // a1
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MOVD (2*8)(R19), R1 // a2
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MOVD (3*8)(R19), R2 // a3
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MOVD (4*8)(R19), R3 // a4
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MOVD (5*8)(R19), R4 // a5
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MOVD (6*8)(R19), R5 // a6
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MOVD $0, R6 // vararg
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CALL R11
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MOVD R0, (7*8)(R19) // r1
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MOVD R1, (8*8)(R19) // r2
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// Standard libc functions return -1 on error
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// and set errno.
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CMPW $-1, R0
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BNE ok
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// Get error code from libc.
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CALL libc_errno(SB)
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MOVW (R0), R0
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MOVD R0, (9*8)(R19) // err
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ok:
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RET
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// syscall6X calls a function in libc on behalf of the syscall package.
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// syscall6X takes a pointer to a struct like:
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// struct {
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// fn uintptr
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// a1 uintptr
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// a2 uintptr
|
|
// a3 uintptr
|
|
// a4 uintptr
|
|
// a5 uintptr
|
|
// a6 uintptr
|
|
// r1 uintptr
|
|
// r2 uintptr
|
|
// err uintptr
|
|
// }
|
|
// syscall6X must be called on the g0 stack with the
|
|
// C calling convention (use libcCall).
|
|
//
|
|
// syscall6X is like syscall6 but expects a 64-bit result
|
|
// and tests for 64-bit -1 to decide there was an error.
|
|
TEXT runtime·syscall6X(SB),NOSPLIT,$0
|
|
MOVD R0, R19 // pointer to args
|
|
|
|
MOVD (0*8)(R19), R11 // fn
|
|
MOVD (1*8)(R19), R0 // a1
|
|
MOVD (2*8)(R19), R1 // a2
|
|
MOVD (3*8)(R19), R2 // a3
|
|
MOVD (4*8)(R19), R3 // a4
|
|
MOVD (5*8)(R19), R4 // a5
|
|
MOVD (6*8)(R19), R5 // a6
|
|
MOVD $0, R6 // vararg
|
|
|
|
CALL R11
|
|
|
|
MOVD R0, (7*8)(R19) // r1
|
|
MOVD R1, (8*8)(R19) // r2
|
|
|
|
// Standard libc functions return -1 on error
|
|
// and set errno.
|
|
CMP $-1, R0
|
|
BNE ok
|
|
|
|
// Get error code from libc.
|
|
CALL libc_errno(SB)
|
|
MOVW (R0), R0
|
|
MOVD R0, (9*8)(R19) // err
|
|
|
|
ok:
|
|
RET
|
|
|
|
// syscall10 calls a function in libc on behalf of the syscall package.
|
|
// syscall10 takes a pointer to a struct like:
|
|
// struct {
|
|
// fn uintptr
|
|
// a1 uintptr
|
|
// a2 uintptr
|
|
// a3 uintptr
|
|
// a4 uintptr
|
|
// a5 uintptr
|
|
// a6 uintptr
|
|
// a7 uintptr
|
|
// a8 uintptr
|
|
// a9 uintptr
|
|
// a10 uintptr
|
|
// r1 uintptr
|
|
// r2 uintptr
|
|
// err uintptr
|
|
// }
|
|
// syscall10 must be called on the g0 stack with the
|
|
// C calling convention (use libcCall).
|
|
TEXT runtime·syscall10(SB),NOSPLIT,$0
|
|
MOVD R0, R19 // pointer to args
|
|
|
|
MOVD (0*8)(R19), R11 // fn
|
|
MOVD (1*8)(R19), R0 // a1
|
|
MOVD (2*8)(R19), R1 // a2
|
|
MOVD (3*8)(R19), R2 // a3
|
|
MOVD (4*8)(R19), R3 // a4
|
|
MOVD (5*8)(R19), R4 // a5
|
|
MOVD (6*8)(R19), R5 // a6
|
|
MOVD (7*8)(R19), R6 // a7
|
|
MOVD (8*8)(R19), R7 // a8
|
|
MOVD (9*8)(R19), R8 // a9
|
|
MOVD (10*8)(R19), R9 // a10
|
|
MOVD $0, R10 // vararg
|
|
|
|
CALL R11
|
|
|
|
MOVD R0, (11*8)(R19) // r1
|
|
MOVD R1, (12*8)(R19) // r2
|
|
|
|
// Standard libc functions return -1 on error
|
|
// and set errno.
|
|
CMPW $-1, R0
|
|
BNE ok
|
|
|
|
// Get error code from libc.
|
|
CALL libc_errno(SB)
|
|
MOVW (R0), R0
|
|
MOVD R0, (13*8)(R19) // err
|
|
|
|
ok:
|
|
RET
|
|
|
|
// syscall10X calls a function in libc on behalf of the syscall package.
|
|
// syscall10X takes a pointer to a struct like:
|
|
// struct {
|
|
// fn uintptr
|
|
// a1 uintptr
|
|
// a2 uintptr
|
|
// a3 uintptr
|
|
// a4 uintptr
|
|
// a5 uintptr
|
|
// a6 uintptr
|
|
// a7 uintptr
|
|
// a8 uintptr
|
|
// a9 uintptr
|
|
// a10 uintptr
|
|
// r1 uintptr
|
|
// r2 uintptr
|
|
// err uintptr
|
|
// }
|
|
// syscall10X must be called on the g0 stack with the
|
|
// C calling convention (use libcCall).
|
|
//
|
|
// syscall10X is like syscall10 but expects a 64-bit result
|
|
// and tests for 64-bit -1 to decide there was an error.
|
|
TEXT runtime·syscall10X(SB),NOSPLIT,$0
|
|
MOVD R0, R19 // pointer to args
|
|
|
|
MOVD (0*8)(R19), R11 // fn
|
|
MOVD (1*8)(R19), R0 // a1
|
|
MOVD (2*8)(R19), R1 // a2
|
|
MOVD (3*8)(R19), R2 // a3
|
|
MOVD (4*8)(R19), R3 // a4
|
|
MOVD (5*8)(R19), R4 // a5
|
|
MOVD (6*8)(R19), R5 // a6
|
|
MOVD (7*8)(R19), R6 // a7
|
|
MOVD (8*8)(R19), R7 // a8
|
|
MOVD (9*8)(R19), R8 // a9
|
|
MOVD (10*8)(R19), R9 // a10
|
|
MOVD $0, R10 // vararg
|
|
|
|
CALL R11
|
|
|
|
MOVD R0, (11*8)(R19) // r1
|
|
MOVD R1, (12*8)(R19) // r2
|
|
|
|
// Standard libc functions return -1 on error
|
|
// and set errno.
|
|
CMP $-1, R0
|
|
BNE ok
|
|
|
|
// Get error code from libc.
|
|
CALL libc_errno(SB)
|
|
MOVW (R0), R0
|
|
MOVD R0, (13*8)(R19) // err
|
|
|
|
ok:
|
|
RET
|