code review 5348052: runtime, syscall: convert from godefs to cgo

src/pkg/runtime/linux/defs.go

 // Copyright 2009 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.
 
 /*
- * Input to godefs
-        godefs -f -m64 defs.c >amd64/defs.h
-        godefs -f -m64 defs1.c >>amd64/defs.h
- */
+Input to cgo -cdefs
 
+GOARCH=amd64 cgo -cdefs defs.go defs1.go >amd64/defs.h
+*/
+
+package runtime
+
+/*
 // Linux glibc and Linux kernel define different and conflicting
 // definitions for struct sigaction, struct timespec, etc.
 // We want the kernel ones, which are in the asm/* headers.
 // But then we'd get conflicts when we include the system
 // headers for things like ucontext_t, so that happens in
-// a separate file, defs1.c.
+// a separate file, defs1.go.
 
 #include <asm/posix_types.h>
 #define size_t __kernel_size_t
 #include <asm/signal.h>
 #include <asm/siginfo.h>
 #include <asm/mman.h>
+*/
+import "C"
 
-enum {
-        $PROT_NONE = PROT_NONE,
-        $PROT_READ = PROT_READ,
-        $PROT_WRITE = PROT_WRITE,
-        $PROT_EXEC = PROT_EXEC,
+const (
+        PROT_NONE  = C.PROT_NONE
+        PROT_READ  = C.PROT_READ
+        PROT_WRITE = C.PROT_WRITE
+        PROT_EXEC  = C.PROT_EXEC
 
-        $MAP_ANON = MAP_ANONYMOUS,
-        $MAP_PRIVATE = MAP_PRIVATE,
-        $MAP_FIXED = MAP_FIXED,
+        MAP_ANON    = C.MAP_ANONYMOUS
+        MAP_PRIVATE = C.MAP_PRIVATE
+        MAP_FIXED   = C.MAP_FIXED
 
-        $SA_RESTART = SA_RESTART,
-        $SA_ONSTACK = SA_ONSTACK,
-        $SA_RESTORER = SA_RESTORER,
-        $SA_SIGINFO = SA_SIGINFO,
- ·······
-        $SIGHUP = SIGHUP,
-        $SIGINT = SIGINT,
-        $SIGQUIT = SIGQUIT,
-        $SIGILL = SIGILL,
-        $SIGTRAP = SIGTRAP,
-        $SIGABRT = SIGABRT,
-        $SIGBUS = SIGBUS,
-        $SIGFPE = SIGFPE,
-        $SIGKILL = SIGKILL,
-        $SIGUSR1 = SIGUSR1,
-        $SIGSEGV = SIGSEGV,
-        $SIGUSR2 = SIGUSR2,
-        $SIGPIPE = SIGPIPE,
-        $SIGALRM = SIGALRM,
-        $SIGSTKFLT = SIGSTKFLT,
-        $SIGCHLD = SIGCHLD,
-        $SIGCONT = SIGCONT,
-        $SIGSTOP = SIGSTOP,
-        $SIGTSTP = SIGTSTP,
-        $SIGTTIN = SIGTTIN,
-        $SIGTTOU = SIGTTOU,
-        $SIGURG = SIGURG,
-        $SIGXCPU = SIGXCPU,
-        $SIGXFSZ = SIGXFSZ,
-        $SIGVTALRM = SIGVTALRM,
-        $SIGPROF = SIGPROF,
-        $SIGWINCH = SIGWINCH,
-        $SIGIO = SIGIO,
-        $SIGPWR = SIGPWR,
-        $SIGSYS = SIGSYS,
- ·······
-        $FPE_INTDIV = FPE_INTDIV,
-        $FPE_INTOVF = FPE_INTOVF,
-        $FPE_FLTDIV = FPE_FLTDIV,
-        $FPE_FLTOVF = FPE_FLTOVF,
-        $FPE_FLTUND = FPE_FLTUND,
-        $FPE_FLTRES = FPE_FLTRES,
-        $FPE_FLTINV = FPE_FLTINV,
-        $FPE_FLTSUB = FPE_FLTSUB,
- ·······
-        $BUS_ADRALN = BUS_ADRALN,
-        $BUS_ADRERR = BUS_ADRERR,
-        $BUS_OBJERR = BUS_OBJERR,
- ·······
-        $SEGV_MAPERR = SEGV_MAPERR,
-        $SEGV_ACCERR = SEGV_ACCERR,
- ·······
-        $ITIMER_REAL = ITIMER_REAL,
-        $ITIMER_VIRTUAL = ITIMER_VIRTUAL,
-        $ITIMER_PROF = ITIMER_PROF,
-};
+        SA_RESTART  = C.SA_RESTART
+        SA_ONSTACK  = C.SA_ONSTACK
+        SA_RESTORER = C.SA_RESTORER
+        SA_SIGINFO  = C.SA_SIGINFO
 
-typedef struct timespec $Timespec;
-typedef struct timeval $Timeval;
-typedef struct sigaction $Sigaction;
-typedef siginfo_t $Siginfo;
-typedef struct itimerval $Itimerval;
+        SIGHUP    = C.SIGHUP
+        SIGINT    = C.SIGINT
+        SIGQUIT   = C.SIGQUIT
+        SIGILL    = C.SIGILL
+        SIGTRAP   = C.SIGTRAP
+        SIGABRT   = C.SIGABRT
+        SIGBUS    = C.SIGBUS
+        SIGFPE    = C.SIGFPE
+        SIGKILL   = C.SIGKILL
+        SIGUSR1   = C.SIGUSR1
+        SIGSEGV   = C.SIGSEGV
+        SIGUSR2   = C.SIGUSR2
+        SIGPIPE   = C.SIGPIPE
+        SIGALRM   = C.SIGALRM
+        SIGSTKFLT = C.SIGSTKFLT
+        SIGCHLD   = C.SIGCHLD
+        SIGCONT   = C.SIGCONT
+        SIGSTOP   = C.SIGSTOP
+        SIGTSTP   = C.SIGTSTP
+        SIGTTIN   = C.SIGTTIN
+        SIGTTOU   = C.SIGTTOU
+        SIGURG    = C.SIGURG
+        SIGXCPU   = C.SIGXCPU
+        SIGXFSZ   = C.SIGXFSZ
+        SIGVTALRM = C.SIGVTALRM
+        SIGPROF   = C.SIGPROF
+        SIGWINCH  = C.SIGWINCH
+        SIGIO     = C.SIGIO
+        SIGPWR    = C.SIGPWR
+        SIGSYS    = C.SIGSYS
+
+        FPE_INTDIV = C.FPE_INTDIV
+        FPE_INTOVF = C.FPE_INTOVF
+        FPE_FLTDIV = C.FPE_FLTDIV
+        FPE_FLTOVF = C.FPE_FLTOVF
+        FPE_FLTUND = C.FPE_FLTUND
+        FPE_FLTRES = C.FPE_FLTRES
+        FPE_FLTINV = C.FPE_FLTINV
+        FPE_FLTSUB = C.FPE_FLTSUB
+
+        BUS_ADRALN = C.BUS_ADRALN
+        BUS_ADRERR = C.BUS_ADRERR
+        BUS_OBJERR = C.BUS_OBJERR
+
+        SEGV_MAPERR = C.SEGV_MAPERR
+        SEGV_ACCERR = C.SEGV_ACCERR
+
+        ITIMER_REAL    = C.ITIMER_REAL
+        ITIMER_VIRTUAL = C.ITIMER_VIRTUAL
+        ITIMER_PROF    = C.ITIMER_PROF
+)
+
+type Timespec C.struct_timespec
+type Timeval C.struct_timeval
+type Sigaction C.struct_sigaction
+type Siginfo C.siginfo_t
+type Itimerval C.struct_itimerval