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      1 // Copyright 2013 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() *sigcontext {
     17 	return (*sigcontext)(c.ctxt)
     18 }
     19 
     20 func (c *sigctxt) r0() uint32  { return c.regs().sc_r0 }
     21 func (c *sigctxt) r1() uint32  { return c.regs().sc_r1 }
     22 func (c *sigctxt) r2() uint32  { return c.regs().sc_r2 }
     23 func (c *sigctxt) r3() uint32  { return c.regs().sc_r3 }
     24 func (c *sigctxt) r4() uint32  { return c.regs().sc_r4 }
     25 func (c *sigctxt) r5() uint32  { return c.regs().sc_r5 }
     26 func (c *sigctxt) r6() uint32  { return c.regs().sc_r6 }
     27 func (c *sigctxt) r7() uint32  { return c.regs().sc_r7 }
     28 func (c *sigctxt) r8() uint32  { return c.regs().sc_r8 }
     29 func (c *sigctxt) r9() uint32  { return c.regs().sc_r9 }
     30 func (c *sigctxt) r10() uint32 { return c.regs().sc_r10 }
     31 func (c *sigctxt) fp() uint32  { return c.regs().sc_r11 }
     32 func (c *sigctxt) ip() uint32  { return c.regs().sc_r12 }
     33 func (c *sigctxt) sp() uint32  { return c.regs().sc_usr_sp }
     34 func (c *sigctxt) lr() uint32  { return c.regs().sc_usr_lr }
     35 
     36 //go:nosplit
     37 //go:nowritebarrierrec
     38 func (c *sigctxt) pc() uint32 { return c.regs().sc_pc }
     39 
     40 func (c *sigctxt) cpsr() uint32    { return c.regs().sc_spsr }
     41 func (c *sigctxt) fault() uint32   { return c.sigaddr() }
     42 func (c *sigctxt) trap() uint32    { return 0 }
     43 func (c *sigctxt) error() uint32   { return 0 }
     44 func (c *sigctxt) oldmask() uint32 { return 0 }
     45 
     46 func (c *sigctxt) sigcode() uint32 { return uint32(c.info.si_code) }
     47 func (c *sigctxt) sigaddr() uint32 {
     48 	return *(*uint32)(add(unsafe.Pointer(c.info), 12))
     49 }
     50 
     51 func (c *sigctxt) set_pc(x uint32)  { c.regs().sc_pc = x }
     52 func (c *sigctxt) set_sp(x uint32)  { c.regs().sc_usr_sp = x }
     53 func (c *sigctxt) set_lr(x uint32)  { c.regs().sc_usr_lr = x }
     54 func (c *sigctxt) set_r10(x uint32) { c.regs().sc_r10 = x }
     55 
     56 func (c *sigctxt) set_sigcode(x uint32) { c.info.si_code = int32(x) }
     57 func (c *sigctxt) set_sigaddr(x uint32) {
     58 	*(*uint32)(add(unsafe.Pointer(c.info), 12)) = x
     59 }
     60