--- /dev/null
+// 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
+}
--- /dev/null
+// 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)
+}
--- /dev/null
+// 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))
+}