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// Copyright 2009 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.
package runtime
import "unsafe"
type sigTabT struct {
flags int32
name string
}
var sigtable = [...]sigTabT{
/* 0 */ {0, "SIGNONE: no trap"},
/* 1 */ {_SigNotify + _SigKill, "SIGHUP: terminal line hangup"},
/* 2 */ {_SigNotify + _SigKill, "SIGINT: interrupt"},
/* 3 */ {_SigNotify + _SigThrow, "SIGQUIT: quit"},
/* 4 */ {_SigThrow + _SigUnblock, "SIGILL: illegal instruction"},
/* 5 */ {_SigThrow + _SigUnblock, "SIGTRAP: trace trap"},
/* 6 */ {_SigNotify + _SigThrow, "SIGABRT: abort"},
/* 7 */ {_SigThrow, "SIGEMT: emulate instruction executed"},
/* 8 */ {_SigPanic + _SigUnblock, "SIGFPE: floating-point exception"},
/* 9 */ {0, "SIGKILL: kill"},
/* 10 */ {_SigPanic + _SigUnblock, "SIGBUS: bus error"},
/* 11 */ {_SigPanic + _SigUnblock, "SIGSEGV: segmentation violation"},
/* 12 */ {_SigThrow, "SIGSYS: bad system call"},
/* 13 */ {_SigNotify, "SIGPIPE: write to broken pipe"},
/* 14 */ {_SigNotify, "SIGALRM: alarm clock"},
/* 15 */ {_SigNotify + _SigKill, "SIGTERM: termination"},
/* 16 */ {_SigNotify, "SIGURG: urgent condition on socket"},
/* 17 */ {0, "SIGSTOP: stop"},
/* 18 */ {_SigNotify + _SigDefault, "SIGTSTP: keyboard stop"},
/* 19 */ {_SigNotify + _SigDefault, "SIGCONT: continue after stop"},
/* 20 */ {_SigNotify + _SigUnblock, "SIGCHLD: child status has changed"},
/* 21 */ {_SigNotify + _SigDefault, "SIGTTIN: background read from tty"},
/* 22 */ {_SigNotify + _SigDefault, "SIGTTOU: background write to tty"},
/* 23 */ {_SigNotify, "SIGIO: i/o now possible"},
/* 24 */ {_SigNotify, "SIGXCPU: cpu limit exceeded"},
/* 25 */ {_SigNotify, "SIGXFSZ: file size limit exceeded"},
/* 26 */ {_SigNotify, "SIGVTALRM: virtual alarm clock"},
/* 27 */ {_SigNotify + _SigUnblock, "SIGPROF: profiling alarm clock"},
/* 28 */ {_SigNotify, "SIGWINCH: window size change"},
/* 29 */ {_SigNotify, "SIGINFO: status request from keyboard"},
/* 30 */ {_SigNotify, "SIGUSR1: user-defined signal 1"},
/* 31 */ {_SigNotify, "SIGUSR2: user-defined signal 2"},
}
//go:noescape
func sigreturn(ctx unsafe.Pointer, infostyle uint32)
//go:nosplit
//go:nowritebarrierrec
func sigtrampgo(fn uintptr, infostyle, sig uint32, info *siginfo, ctx unsafe.Pointer) {
if sigfwdgo(sig, info, ctx) {
sigreturn(ctx, infostyle)
return
}
g := getg()
if g == nil {
badsignal(uintptr(sig))
sigreturn(ctx, infostyle)
return
}
// If some non-Go code called sigaltstack, adjust.
sp := uintptr(unsafe.Pointer(&sig))
if sp < g.m.gsignal.stack.lo || sp >= g.m.gsignal.stack.hi {
var st stackt
sigaltstack(nil, &st)
if st.ss_flags&_SS_DISABLE != 0 {
setg(nil)
cgocallback(unsafe.Pointer(funcPC(noSignalStack)), noescape(unsafe.Pointer(&sig)), unsafe.Sizeof(sig))
}
stsp := uintptr(unsafe.Pointer(st.ss_sp))
if sp < stsp || sp >= stsp+st.ss_size {
setg(nil)
cgocallback(unsafe.Pointer(funcPC(sigNotOnStack)), noescape(unsafe.Pointer(&sig)), unsafe.Sizeof(sig))
}
g.m.gsignal.stack.lo = stsp
g.m.gsignal.stack.hi = stsp + st.ss_size
g.m.gsignal.stackguard0 = stsp + _StackGuard
g.m.gsignal.stackguard1 = stsp + _StackGuard
g.m.gsignal.stackAlloc = st.ss_size
g.m.gsignal.stktopsp = getcallersp(unsafe.Pointer(&sig))
}
setg(g.m.gsignal)
c := &sigctxt{info, ctx}
c.fixsigcode(sig)
sighandler(sig, info, ctx, g)
setg(g)
sigreturn(ctx, infostyle)
}
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