Initial commit: Go 1.23 release state

src/runtime/signal_386.go

@@ -0,0 +1,59 @@
+// Copyright 2013 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 dragonfly || freebsd || linux || netbsd || openbsd
+
+package runtime
+
+import (
+	"internal/abi"
+	"internal/goarch"
+	"unsafe"
+)
+
+func dumpregs(c *sigctxt) {
+	print("eax    ", hex(c.eax()), "\n")
+	print("ebx    ", hex(c.ebx()), "\n")
+	print("ecx    ", hex(c.ecx()), "\n")
+	print("edx    ", hex(c.edx()), "\n")
+	print("edi    ", hex(c.edi()), "\n")
+	print("esi    ", hex(c.esi()), "\n")
+	print("ebp    ", hex(c.ebp()), "\n")
+	print("esp    ", hex(c.esp()), "\n")
+	print("eip    ", hex(c.eip()), "\n")
+	print("eflags ", hex(c.eflags()), "\n")
+	print("cs     ", hex(c.cs()), "\n")
+	print("fs     ", hex(c.fs()), "\n")
+	print("gs     ", hex(c.gs()), "\n")
+}
+
+//go:nosplit
+//go:nowritebarrierrec
+func (c *sigctxt) sigpc() uintptr { return uintptr(c.eip()) }
+
+func (c *sigctxt) sigsp() uintptr { return uintptr(c.esp()) }
+func (c *sigctxt) siglr() uintptr { return 0 }
+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) {
+	pc := uintptr(c.eip())
+	sp := uintptr(c.esp())
+
+	if shouldPushSigpanic(gp, pc, *(*uintptr)(unsafe.Pointer(sp))) {
+		c.pushCall(abi.FuncPCABIInternal(sigpanic), pc)
+	} else {
+		// Not safe to push the call. Just clobber the frame.
+		c.set_eip(uint32(abi.FuncPCABIInternal(sigpanic)))
+	}
+}
+
+func (c *sigctxt) pushCall(targetPC, resumePC uintptr) {
+	// Make it look like we called target at resumePC.
+	sp := uintptr(c.esp())
+	sp -= goarch.PtrSize
+	*(*uintptr)(unsafe.Pointer(sp)) = resumePC
+	c.set_esp(uint32(sp))
+	c.set_eip(uint32(targetPC))
+}