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runtime: implement signal for linux/loong64

Browse Source 
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: Ifa0229d2044dd53683de4a2b3ab965b16263f267
Reviewed-on: https://go-review.googlesource.com/c/go/+/368075
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Xiaodong Liu 2022-05-19 20:01:10 +08:00 committed by Gopher Robot
parent c8de7628cb
commit 0084706528
3 changed files with 385 additions and 0 deletions
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212
src/runtime/defs_linux_loong64.go Normal file
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// Generated using cgo, then manually converted into appropriate naming and code
// for the Go runtime.
// go tool cgo -godefs defs_linux.go defs1_linux.go defs2_linux.go
package runtime
import "unsafe"
const (
_EINTR = 0x4
_EAGAIN = 0xb
_ENOMEM = 0xc
_ENOSYS = 0x26
_PROT_NONE = 0x0
_PROT_READ = 0x1
_PROT_WRITE = 0x2
_PROT_EXEC = 0x4
_MAP_ANON = 0x20
_MAP_PRIVATE = 0x2
_MAP_FIXED = 0x10
_MADV_DONTNEED = 0x4
_MADV_FREE = 0x8
_MADV_HUGEPAGE = 0xe
_MADV_NOHUGEPAGE = 0xf
_SA_RESTART = 0x10000000
_SA_ONSTACK = 0x8000000
_SA_SIGINFO = 0x4
_SA_RESTORER = 0x0
_SI_KERNEL = 0x80
_SI_TIMER = -0x2
_SIGHUP = 0x1
_SIGINT = 0x2
_SIGQUIT = 0x3
_SIGILL = 0x4
_SIGTRAP = 0x5
_SIGABRT = 0x6
_SIGBUS = 0x7
_SIGFPE = 0x8
_SIGKILL = 0x9
_SIGUSR1 = 0xa
_SIGSEGV = 0xb
_SIGUSR2 = 0xc
_SIGPIPE = 0xd
_SIGALRM = 0xe
_SIGSTKFLT = 0x10
_SIGCHLD = 0x11
_SIGCONT = 0x12
_SIGSTOP = 0x13
_SIGTSTP = 0x14
_SIGTTIN = 0x15
_SIGTTOU = 0x16
_SIGURG = 0x17
_SIGXCPU = 0x18
_SIGXFSZ = 0x19
_SIGVTALRM = 0x1a
_SIGPROF = 0x1b
_SIGWINCH = 0x1c
_SIGIO = 0x1d
_SIGPWR = 0x1e
_SIGSYS = 0x1f
_SIGRTMIN = 0x20
_FPE_INTDIV = 0x1
_FPE_INTOVF = 0x2
_FPE_FLTDIV = 0x3
_FPE_FLTOVF = 0x4
_FPE_FLTUND = 0x5
_FPE_FLTRES = 0x6
_FPE_FLTINV = 0x7
_FPE_FLTSUB = 0x8
_BUS_ADRALN = 0x1
_BUS_ADRERR = 0x2
_BUS_OBJERR = 0x3
_SEGV_MAPERR = 0x1
_SEGV_ACCERR = 0x2
_ITIMER_REAL = 0x0
_ITIMER_VIRTUAL = 0x1
_ITIMER_PROF = 0x2
_CLOCK_THREAD_CPUTIME_ID = 0x3
_SIGEV_THREAD_ID = 0x4
_EPOLLIN = 0x1
_EPOLLOUT = 0x4
_EPOLLERR = 0x8
_EPOLLHUP = 0x10
_EPOLLRDHUP = 0x2000
_EPOLLET = 0x80000000
_EPOLL_CLOEXEC = 0x80000
_EPOLL_CTL_ADD = 0x1
_EPOLL_CTL_DEL = 0x2
_EPOLL_CTL_MOD = 0x3
)
type timespec struct {
tv_sec int64
tv_nsec int64
}
//go:nosplit
func (ts *timespec) setNsec(ns int64) {
ts.tv_sec = ns / 1e9
ts.tv_nsec = ns % 1e9
}
type timeval struct {
tv_sec int64
tv_usec int64
}
func (tv *timeval) set_usec(x int32) {
tv.tv_usec = int64(x)
}
type itimerspec struct {
it_interval timespec
it_value timespec
}
type itimerval struct {
it_interval timeval
it_value timeval
}
type sigeventFields struct {
value uintptr
signo int32
notify int32
// below here is a union; sigev_notify_thread_id is the only field we use
sigev_notify_thread_id int32
}
type sigevent struct {
sigeventFields
// Pad struct to the max size in the kernel.
_ [_sigev_max_size - unsafe.Sizeof(sigeventFields{})]byte
}
type epollevent struct {
events uint32
pad_cgo_0 [4]byte
data [8]byte // unaligned uintptr
}
const (
_O_RDONLY = 0x0
_O_NONBLOCK = 0x800
_O_CLOEXEC = 0x80000
)
type sigactiont struct {
sa_handler uintptr
sa_flags uint64
sa_mask uint64
// Linux on loong64 does not have the sa_restorer field, but the setsig
// function references it (for x86). Not much harm to include it at the end.
sa_restorer uintptr
}
type siginfoFields struct {
si_signo int32
si_errno int32
si_code int32
__pad0 [1]int32
// below here is a union; si_addr is the only field we use
si_addr uint64
}
type siginfo struct {
siginfoFields
// Pad struct to the max size in the kernel.
_ [_si_max_size - unsafe.Sizeof(siginfoFields{})]byte
}
type usigset struct {
val [16]uint64
}
type stackt struct {
ss_sp *byte
ss_flags int32
pad_cgo_0 [4]byte
ss_size uintptr
}
type sigcontext struct {
sc_pc uint64
sc_regs [32]uint64
sc_flags uint32
sc_extcontext [0]uint64
}
type ucontext struct {
uc_flags uint64
uc_link *ucontext
uc_stack stackt
uc_sigmask usigset
uc_x_unused [0]uint8
uc_pad_cgo_0 [8]byte
uc_mcontext sigcontext
}

75
src/runtime/signal_linux_loong64.go Normal file
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// 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
import (
"internal/goarch"
"unsafe"
)
type sigctxt struct {
info *siginfo
ctxt unsafe.Pointer
}
//go:nosplit
//go:nowritebarrierrec
func (c *sigctxt) regs() *sigcontext { return &(*ucontext)(c.ctxt).uc_mcontext }
func (c *sigctxt) r0() uint64 { return c.regs().sc_regs[0] }
func (c *sigctxt) r1() uint64 { return c.regs().sc_regs[1] }
func (c *sigctxt) r2() uint64 { return c.regs().sc_regs[2] }
func (c *sigctxt) r3() uint64 { return c.regs().sc_regs[3] }
func (c *sigctxt) r4() uint64 { return c.regs().sc_regs[4] }
func (c *sigctxt) r5() uint64 { return c.regs().sc_regs[5] }
func (c *sigctxt) r6() uint64 { return c.regs().sc_regs[6] }
func (c *sigctxt) r7() uint64 { return c.regs().sc_regs[7] }
func (c *sigctxt) r8() uint64 { return c.regs().sc_regs[8] }
func (c *sigctxt) r9() uint64 { return c.regs().sc_regs[9] }
func (c *sigctxt) r10() uint64 { return c.regs().sc_regs[10] }
func (c *sigctxt) r11() uint64 { return c.regs().sc_regs[11] }
func (c *sigctxt) r12() uint64 { return c.regs().sc_regs[12] }
func (c *sigctxt) r13() uint64 { return c.regs().sc_regs[13] }
func (c *sigctxt) r14() uint64 { return c.regs().sc_regs[14] }
func (c *sigctxt) r15() uint64 { return c.regs().sc_regs[15] }
func (c *sigctxt) r16() uint64 { return c.regs().sc_regs[16] }
func (c *sigctxt) r17() uint64 { return c.regs().sc_regs[17] }
func (c *sigctxt) r18() uint64 { return c.regs().sc_regs[18] }
func (c *sigctxt) r19() uint64 { return c.regs().sc_regs[19] }
func (c *sigctxt) r20() uint64 { return c.regs().sc_regs[20] }
func (c *sigctxt) r21() uint64 { return c.regs().sc_regs[21] }
func (c *sigctxt) r22() uint64 { return c.regs().sc_regs[22] }
func (c *sigctxt) r23() uint64 { return c.regs().sc_regs[23] }
func (c *sigctxt) r24() uint64 { return c.regs().sc_regs[24] }
func (c *sigctxt) r25() uint64 { return c.regs().sc_regs[25] }
func (c *sigctxt) r26() uint64 { return c.regs().sc_regs[26] }
func (c *sigctxt) r27() uint64 { return c.regs().sc_regs[27] }
func (c *sigctxt) r28() uint64 { return c.regs().sc_regs[28] }
func (c *sigctxt) r29() uint64 { return c.regs().sc_regs[29] }
func (c *sigctxt) r30() uint64 { return c.regs().sc_regs[30] }
func (c *sigctxt) r31() uint64 { return c.regs().sc_regs[31] }
func (c *sigctxt) sp() uint64 { return c.regs().sc_regs[3] }
//go:nosplit
//go:nowritebarrierrec
func (c *sigctxt) pc() uint64 { return c.regs().sc_pc }
func (c *sigctxt) link() uint64 { return c.regs().sc_regs[1] }
func (c *sigctxt) sigcode() uint32 { return uint32(c.info.si_code) }
func (c *sigctxt) sigaddr() uint64 { return c.info.si_addr }
func (c *sigctxt) set_r31(x uint64) { c.regs().sc_regs[31] = x }
func (c *sigctxt) set_r22(x uint64) { c.regs().sc_regs[22] = x }
func (c *sigctxt) set_pc(x uint64) { c.regs().sc_pc = x }
func (c *sigctxt) set_sp(x uint64) { c.regs().sc_regs[3] = x }
func (c *sigctxt) set_link(x uint64) { c.regs().sc_regs[1] = x }
func (c *sigctxt) set_sigcode(x uint32) { c.info.si_code = int32(x) }
func (c *sigctxt) set_sigaddr(x uint64) {
*(*uintptr)(add(unsafe.Pointer(c.info), 2*goarch.PtrSize)) = uintptr(x)
}

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src/runtime/signal_loong64.go Normal file
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// 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
import (
"internal/abi"
"internal/goarch"
"unsafe"
)
func dumpregs(c *sigctxt) {
print("r0 ", hex(c.r0()), "\t")
print("r1 ", hex(c.r1()), "\n")
print("r2 ", hex(c.r2()), "\t")
print("r3 ", hex(c.r3()), "\n")
print("r4 ", hex(c.r4()), "\t")
print("r5 ", hex(c.r5()), "\n")
print("r6 ", hex(c.r6()), "\t")
print("r7 ", hex(c.r7()), "\n")
print("r8 ", hex(c.r8()), "\t")
print("r9 ", hex(c.r9()), "\n")
print("r10 ", hex(c.r10()), "\t")
print("r11 ", hex(c.r11()), "\n")
print("r12 ", hex(c.r12()), "\t")
print("r13 ", hex(c.r13()), "\n")
print("r14 ", hex(c.r14()), "\t")
print("r15 ", hex(c.r15()), "\n")
print("r16 ", hex(c.r16()), "\t")
print("r17 ", hex(c.r17()), "\n")
print("r18 ", hex(c.r18()), "\t")
print("r19 ", hex(c.r19()), "\n")
print("r20 ", hex(c.r20()), "\t")
print("r21 ", hex(c.r21()), "\n")
print("r22 ", hex(c.r22()), "\t")
print("r23 ", hex(c.r23()), "\n")
print("r24 ", hex(c.r24()), "\t")
print("r25 ", hex(c.r25()), "\n")
print("r26 ", hex(c.r26()), "\t")
print("r27 ", hex(c.r27()), "\n")
print("r28 ", hex(c.r28()), "\t")
print("r29 ", hex(c.r29()), "\n")
print("r30 ", hex(c.r30()), "\t")
print("r31 ", hex(c.r31()), "\n")
print("pc ", hex(c.pc()), "\t")
print("link ", hex(c.link()), "\n")
}
//go:nosplit
//go:nowritebarrierrec
func (c *sigctxt) sigpc() uintptr { return uintptr(c.pc()) }
func (c *sigctxt) sigsp() uintptr { return uintptr(c.sp()) }
func (c *sigctxt) siglr() uintptr { return uintptr(c.link()) }
func (c *sigctxt) fault() uintptr { return uintptr(c.sigaddr()) }
// preparePanic sets up the stack to look like a call to sigpanic.
func (c *sigctxt) preparePanic(sig uint32, gp *g) {
// We arrange link, and pc to pretend the panicking
// function calls sigpanic directly.
// Always save LINK to stack so that panics in leaf
// functions are correctly handled. This smashes
// the stack frame but we're not going back there
// anyway.
sp := c.sp() - goarch.PtrSize
c.set_sp(sp)
*(*uint64)(unsafe.Pointer(uintptr(sp))) = c.link()
pc := gp.sigpc
if shouldPushSigpanic(gp, pc, uintptr(c.link())) {
// Make it look the like faulting PC called sigpanic.
c.set_link(uint64(pc))
}
// In case we are panicking from external C code
sigpanicPC := uint64(abi.FuncPCABIInternal(sigpanic))
c.set_r31(sigpanicPC >> 32 << 32) // RSB register
c.set_r22(uint64(uintptr(unsafe.Pointer(gp))))
c.set_pc(sigpanicPC)
}
func (c *sigctxt) pushCall(targetPC, resumePC uintptr) {
// Push the LR to stack, as we'll clobber it in order to
// push the call. The function being pushed is responsible
// for restoring the LR and setting the SP back.
// This extra slot is known to gentraceback.
sp := c.sp() - 8
c.set_sp(sp)
*(*uint64)(unsafe.Pointer(uintptr(sp))) = c.link()
// Set up PC and LR to pretend the function being signaled
// calls targetPC at resumePC.
c.set_link(uint64(resumePC))
c.set_pc(uint64(targetPC))
}