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      1 // Copyright 2014 The Go Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style
      3 // license that can be found in the LICENSE file.
      4 
      5 package runtime
      6 
      7 import "unsafe"
      8 
      9 type sigctxt struct {
     10 	info *siginfo
     11 	ctxt unsafe.Pointer
     12 }
     13 
     14 //go:nosplit
     15 //go:nowritebarrierrec
     16 func (c *sigctxt) regs() *mcontext {
     17 	return (*mcontext)(unsafe.Pointer(&(*ucontext)(c.ctxt).uc_mcontext))
     18 }
     19 
     20 func (c *sigctxt) rax() uint64 { return uint64(c.regs().gregs[_REG_RAX]) }
     21 func (c *sigctxt) rbx() uint64 { return uint64(c.regs().gregs[_REG_RBX]) }
     22 func (c *sigctxt) rcx() uint64 { return uint64(c.regs().gregs[_REG_RCX]) }
     23 func (c *sigctxt) rdx() uint64 { return uint64(c.regs().gregs[_REG_RDX]) }
     24 func (c *sigctxt) rdi() uint64 { return uint64(c.regs().gregs[_REG_RDI]) }
     25 func (c *sigctxt) rsi() uint64 { return uint64(c.regs().gregs[_REG_RSI]) }
     26 func (c *sigctxt) rbp() uint64 { return uint64(c.regs().gregs[_REG_RBP]) }
     27 func (c *sigctxt) rsp() uint64 { return uint64(c.regs().gregs[_REG_RSP]) }
     28 func (c *sigctxt) r8() uint64  { return uint64(c.regs().gregs[_REG_R8]) }
     29 func (c *sigctxt) r9() uint64  { return uint64(c.regs().gregs[_REG_R9]) }
     30 func (c *sigctxt) r10() uint64 { return uint64(c.regs().gregs[_REG_R10]) }
     31 func (c *sigctxt) r11() uint64 { return uint64(c.regs().gregs[_REG_R11]) }
     32 func (c *sigctxt) r12() uint64 { return uint64(c.regs().gregs[_REG_R12]) }
     33 func (c *sigctxt) r13() uint64 { return uint64(c.regs().gregs[_REG_R13]) }
     34 func (c *sigctxt) r14() uint64 { return uint64(c.regs().gregs[_REG_R14]) }
     35 func (c *sigctxt) r15() uint64 { return uint64(c.regs().gregs[_REG_R15]) }
     36 
     37 //go:nosplit
     38 //go:nowritebarrierrec
     39 func (c *sigctxt) rip() uint64 { return uint64(c.regs().gregs[_REG_RIP]) }
     40 
     41 func (c *sigctxt) rflags() uint64  { return uint64(c.regs().gregs[_REG_RFLAGS]) }
     42 func (c *sigctxt) cs() uint64      { return uint64(c.regs().gregs[_REG_CS]) }
     43 func (c *sigctxt) fs() uint64      { return uint64(c.regs().gregs[_REG_FS]) }
     44 func (c *sigctxt) gs() uint64      { return uint64(c.regs().gregs[_REG_GS]) }
     45 func (c *sigctxt) sigcode() uint64 { return uint64(c.info.si_code) }
     46 func (c *sigctxt) sigaddr() uint64 { return *(*uint64)(unsafe.Pointer(&c.info.__data[0])) }
     47 
     48 func (c *sigctxt) set_rip(x uint64)     { c.regs().gregs[_REG_RIP] = int64(x) }
     49 func (c *sigctxt) set_rsp(x uint64)     { c.regs().gregs[_REG_RSP] = int64(x) }
     50 func (c *sigctxt) set_sigcode(x uint64) { c.info.si_code = int32(x) }
     51 func (c *sigctxt) set_sigaddr(x uint64) {
     52 	*(*uintptr)(unsafe.Pointer(&c.info.__data[0])) = uintptr(x)
     53 }
     54