runtime: normalize (*sigctxt).fault() type

(*sigctxt).fault() currently returns either uintptr, uint32, or uint64
depending on the platform. Make them all return uintptr.

For #10958 (but a nice change on its own).

Change-Id: I7813e779d0edcba112dd47fda776f4ce6e50e227
Reviewed-on: https://go-review.googlesource.com/68015
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>

src/runtime/signal_darwin_arm.go

@@ -36,7 +36,7 @@ func (c *sigctxt) lr() uint32  { return c.regs().lr }
 func (c *sigctxt) pc() uint32 { return c.regs().pc }
 
 func (c *sigctxt) cpsr() uint32    { return c.regs().cpsr }
-func (c *sigctxt) fault() uint32   { return c.info.si_addr }
+func (c *sigctxt) fault() uintptr  { return uintptr(c.info.si_addr) }
 func (c *sigctxt) sigcode() uint32 { return uint32(c.info.si_code) }
 func (c *sigctxt) trap() uint32    { return 0 }
 func (c *sigctxt) error() uint32   { return 0 }

src/runtime/signal_darwin_arm64.go

@@ -52,7 +52,7 @@ func (c *sigctxt) sp() uint64  { return c.regs().sp }
 //go:nowritebarrierrec
 func (c *sigctxt) pc() uint64 { return c.regs().pc }
 
-func (c *sigctxt) fault() uint64 { return uint64(uintptr(unsafe.Pointer(c.info.si_addr))) }
+func (c *sigctxt) fault() uintptr { return uintptr(unsafe.Pointer(c.info.si_addr)) }
 
 func (c *sigctxt) sigcode() uint64 { return uint64(c.info.si_code) }
 func (c *sigctxt) sigaddr() uint64 { return uint64(uintptr(unsafe.Pointer(c.info.si_addr))) }

src/runtime/signal_freebsd_arm.go

@@ -36,7 +36,7 @@ func (c *sigctxt) lr() uint32  { return c.regs().__gregs[14] }
 func (c *sigctxt) pc() uint32 { return c.regs().__gregs[15] }
 
 func (c *sigctxt) cpsr() uint32    { return c.regs().__gregs[16] }
-func (c *sigctxt) fault() uint32   { return uint32(c.info.si_addr) }
+func (c *sigctxt) fault() uintptr  { return uintptr(c.info.si_addr) }
 func (c *sigctxt) trap() uint32    { return 0 }
 func (c *sigctxt) error() uint32   { return 0 }
 func (c *sigctxt) oldmask() uint32 { return 0 }

src/runtime/signal_linux_arm.go

@@ -39,7 +39,7 @@ func (c *sigctxt) lr() uint32  { return c.regs().lr }
 func (c *sigctxt) pc() uint32 { return c.regs().pc }
 
 func (c *sigctxt) cpsr() uint32    { return c.regs().cpsr }
-func (c *sigctxt) fault() uint32   { return c.regs().fault_address }
+func (c *sigctxt) fault() uintptr  { return uintptr(c.regs().fault_address) }
 func (c *sigctxt) trap() uint32    { return c.regs().trap_no }
 func (c *sigctxt) error() uint32   { return c.regs().error_code }
 func (c *sigctxt) oldmask() uint32 { return c.regs().oldmask }

src/runtime/signal_linux_arm64.go

@@ -56,7 +56,7 @@ func (c *sigctxt) sp() uint64  { return c.regs().sp }
 func (c *sigctxt) pc() uint64 { return c.regs().pc }
 
 func (c *sigctxt) pstate() uint64 { return c.regs().pstate }
-func (c *sigctxt) fault() uint64  { return c.regs().fault_address }
+func (c *sigctxt) fault() uintptr { return uintptr(c.regs().fault_address) }
 
 func (c *sigctxt) sigcode() uint64 { return uint64(c.info.si_code) }
 func (c *sigctxt) sigaddr() uint64 { return c.info.si_addr }

src/runtime/signal_linux_ppc64x.go

@@ -67,7 +67,7 @@ func (c *sigctxt) ccr() uint64  { return c.regs().ccr }
 
 func (c *sigctxt) sigcode() uint32 { return uint32(c.info.si_code) }
 func (c *sigctxt) sigaddr() uint64 { return c.info.si_addr }
-func (c *sigctxt) fault() uint64   { return c.regs().dar }
+func (c *sigctxt) fault() uintptr  { return uintptr(c.regs().dar) }
 
 func (c *sigctxt) set_r0(x uint64)   { c.regs().gpr[0] = x }
 func (c *sigctxt) set_r12(x uint64)  { c.regs().gpr[12] = x }

src/runtime/signal_nacl_arm.go

@@ -36,7 +36,7 @@ func (c *sigctxt) lr() uint32  { return c.regs().lr }
 func (c *sigctxt) pc() uint32 { return c.regs().pc }
 
 func (c *sigctxt) cpsr() uint32    { return c.regs().cpsr }
-func (c *sigctxt) fault() uint32   { return ^uint32(0) }
+func (c *sigctxt) fault() uintptr  { return ^uintptr(0) }
 func (c *sigctxt) trap() uint32    { return ^uint32(0) }
 func (c *sigctxt) error() uint32   { return ^uint32(0) }
 func (c *sigctxt) oldmask() uint32 { return ^uint32(0) }

src/runtime/signal_netbsd_arm.go

@@ -36,7 +36,7 @@ func (c *sigctxt) lr() uint32  { return c.regs().__gregs[_REG_R14] }
 func (c *sigctxt) pc() uint32 { return c.regs().__gregs[_REG_R15] }
 
 func (c *sigctxt) cpsr() uint32    { return c.regs().__gregs[_REG_CPSR] }
-func (c *sigctxt) fault() uint32   { return uint32(c.info._reason) }
+func (c *sigctxt) fault() uintptr  { return uintptr(c.info._reason) }
 func (c *sigctxt) trap() uint32    { return 0 }
 func (c *sigctxt) error() uint32   { return 0 }
 func (c *sigctxt) oldmask() uint32 { return 0 }

src/runtime/signal_openbsd_arm.go

@@ -38,7 +38,7 @@ func (c *sigctxt) lr() uint32  { return c.regs().sc_usr_lr }
 func (c *sigctxt) pc() uint32 { return c.regs().sc_pc }
 
 func (c *sigctxt) cpsr() uint32    { return c.regs().sc_spsr }
-func (c *sigctxt) fault() uint32   { return c.sigaddr() }
+func (c *sigctxt) fault() uintptr  { return uintptr(c.sigaddr()) }
 func (c *sigctxt) trap() uint32    { return 0 }
 func (c *sigctxt) error() uint32   { return 0 }
 func (c *sigctxt) oldmask() uint32 { return 0 }