[dev.cc] runtime: convert Solaris port to Go

Memory management was consolitated with the BSD ports, since
it was almost identical.

Assembly thunks are gone, being replaced by the new //go:linkname
feature.

This change supersedes CL 138390043 (runtime: convert solaris
netpoll to Go), which was previously reviewed and tested.

This change is only the first step, the port now builds,
but doesn't run. Binaries fail to exec:

    ld.so.1: 6.out: fatal: 6.out: TLS requirement failure : TLS support is unavailable
    Killed

This seems to happen because binaries don't link with libc.so
anymore. We will have to solve that in a different CL.

Also this change is just a rough translation of the original
C code, cleanup will come in a different CL.

[This CL is part of the removal of C code from package runtime.
See golang.org/s/dev.cc for an overview.]

LGTM=rsc
R=rsc, dave
CC=golang-codereviews, iant, khr, minux, r, rlh
https://codereview.appspot.com/174960043

1 files changed, 46 insertions, 0 deletions

diff --git a/src/runtime/signal_solaris_amd64.go b/src/runtime/signal_solaris_amd64.go
new file mode 100644
index 000000000..967835ad2
--- /dev/null
+++ b/src/runtime/signal_solaris_amd64.go
@@ -0,0 +1,46 @@
+// Copyright 2014 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 sigctxt struct {
+	info *siginfo
+	ctxt unsafe.Pointer
+}
+
+func (c *sigctxt) regs() *mcontext {
+	return (*mcontext)(unsafe.Pointer(&(*ucontext)(c.ctxt).uc_mcontext))
+}
+func (c *sigctxt) rax() uint64     { return uint64(c.regs().gregs[_REG_RAX]) }
+func (c *sigctxt) rbx() uint64     { return uint64(c.regs().gregs[_REG_RBX]) }
+func (c *sigctxt) rcx() uint64     { return uint64(c.regs().gregs[_REG_RCX]) }
+func (c *sigctxt) rdx() uint64     { return uint64(c.regs().gregs[_REG_RDX]) }
+func (c *sigctxt) rdi() uint64     { return uint64(c.regs().gregs[_REG_RDI]) }
+func (c *sigctxt) rsi() uint64     { return uint64(c.regs().gregs[_REG_RSI]) }
+func (c *sigctxt) rbp() uint64     { return uint64(c.regs().gregs[_REG_RBP]) }
+func (c *sigctxt) rsp() uint64     { return uint64(c.regs().gregs[_REG_RSP]) }
+func (c *sigctxt) r8() uint64      { return uint64(c.regs().gregs[_REG_R8]) }
+func (c *sigctxt) r9() uint64      { return uint64(c.regs().gregs[_REG_R9]) }
+func (c *sigctxt) r10() uint64     { return uint64(c.regs().gregs[_REG_R10]) }
+func (c *sigctxt) r11() uint64     { return uint64(c.regs().gregs[_REG_R11]) }
+func (c *sigctxt) r12() uint64     { return uint64(c.regs().gregs[_REG_R12]) }
+func (c *sigctxt) r13() uint64     { return uint64(c.regs().gregs[_REG_R13]) }
+func (c *sigctxt) r14() uint64     { return uint64(c.regs().gregs[_REG_R14]) }
+func (c *sigctxt) r15() uint64     { return uint64(c.regs().gregs[_REG_R15]) }
+func (c *sigctxt) rip() uint64     { return uint64(c.regs().gregs[_REG_RIP]) }
+func (c *sigctxt) rflags() uint64  { return uint64(c.regs().gregs[_REG_RFLAGS]) }
+func (c *sigctxt) cs() uint64      { return uint64(c.regs().gregs[_REG_CS]) }
+func (c *sigctxt) fs() uint64      { return uint64(c.regs().gregs[_REG_FS]) }
+func (c *sigctxt) gs() uint64      { return uint64(c.regs().gregs[_REG_GS]) }
+func (c *sigctxt) sigcode() uint64 { return uint64(c.info.si_code) }
+func (c *sigctxt) sigaddr() uint64 { return uint64(uintptr(unsafe.Pointer(&c.info.__data[0]))) }
+
+func (c *sigctxt) set_rip(x uint64)     { c.regs().gregs[_REG_RIP] = int64(x) }
+func (c *sigctxt) set_rsp(x uint64)     { c.regs().gregs[_REG_RSP] = int64(x) }
+func (c *sigctxt) set_sigcode(x uint64) { c.info.si_code = int32(x) }
+func (c *sigctxt) set_sigaddr(x uint64) {
+	*(*uintptr)(unsafe.Pointer(&c.info.__data[0])) = uintptr(x)
+}