[dev.cc] runtime: convert Plan 9 port to Go
Thanks to Aram Hăvărneanu, Nick Owens
and Russ Cox for the early reviews.
LGTM=aram, rsc
R=rsc, lucio.dere, aram, ality
CC=golang-codereviews, mischief
https://golang.org/cl/175370043
diff --git a/src/runtime/defs_plan9_386.go b/src/runtime/defs_plan9_386.go
index 170506b..212ecdf 100644
--- a/src/runtime/defs_plan9_386.go
+++ b/src/runtime/defs_plan9_386.go
@@ -1,5 +1,7 @@
package runtime
+const _PAGESIZE = 0x1000
+
type ureg struct {
di uint32 /* general registers */
si uint32 /* ... */
diff --git a/src/runtime/defs_plan9_amd64.go b/src/runtime/defs_plan9_amd64.go
index 17becfb..510da0e 100644
--- a/src/runtime/defs_plan9_amd64.go
+++ b/src/runtime/defs_plan9_amd64.go
@@ -1,5 +1,7 @@
package runtime
+const _PAGESIZE = 0x1000
+
type ureg struct {
ax uint64
bx uint64
diff --git a/src/runtime/env_plan9.go b/src/runtime/env_plan9.go
index e442c34..ec50cac 100644
--- a/src/runtime/env_plan9.go
+++ b/src/runtime/env_plan9.go
@@ -54,3 +54,6 @@
sp.len = int(r)
return s
}
+
+var _cgo_setenv unsafe.Pointer // pointer to C function
+var _cgo_unsetenv unsafe.Pointer // pointer to C function
diff --git a/src/runtime/mem_plan9.c b/src/runtime/mem_plan9.c
deleted file mode 100644
index d673d6f..0000000
--- a/src/runtime/mem_plan9.c
+++ /dev/null
@@ -1,121 +0,0 @@
-// Copyright 2010 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.
-
-#include "runtime.h"
-#include "defs_GOOS_GOARCH.h"
-#include "arch_GOARCH.h"
-#include "malloc.h"
-#include "os_GOOS.h"
-#include "textflag.h"
-
-extern byte runtime·end[];
-#pragma dataflag NOPTR
-static byte *bloc = { runtime·end };
-static Mutex memlock;
-
-enum
-{
- Round = PAGESIZE-1
-};
-
-static void*
-brk(uintptr nbytes)
-{
- uintptr bl;
-
- runtime·lock(&memlock);
- // Plan 9 sbrk from /sys/src/libc/9sys/sbrk.c
- bl = ((uintptr)bloc + Round) & ~Round;
- if(runtime·brk_((void*)(bl + nbytes)) < 0) {
- runtime·unlock(&memlock);
- return nil;
- }
- bloc = (byte*)bl + nbytes;
- runtime·unlock(&memlock);
- return (void*)bl;
-}
-
-static void
-sysalloc(void)
-{
- uintptr nbytes;
- uint64 *stat;
- void *p;
-
- nbytes = g->m->scalararg[0];
- stat = g->m->ptrarg[0];
- g->m->scalararg[0] = 0;
- g->m->ptrarg[0] = nil;
-
- p = brk(nbytes);
- if(p != nil)
- runtime·xadd64(stat, nbytes);
-
- g->m->ptrarg[0] = p;
-}
-
-#pragma textflag NOSPLIT
-void*
-runtime·sysAlloc(uintptr nbytes, uint64 *stat)
-{
- void (*fn)(void);
- void *p;
-
- g->m->scalararg[0] = nbytes;
- g->m->ptrarg[0] = stat;
- fn = sysalloc;
- runtime·onM(&fn);
- p = g->m->ptrarg[0];
- g->m->ptrarg[0] = nil;
- return p;
-}
-
-void
-runtime·SysFree(void *v, uintptr nbytes, uint64 *stat)
-{
- runtime·xadd64(stat, -(uint64)nbytes);
- runtime·lock(&memlock);
- // from tiny/mem.c
- // Push pointer back if this is a free
- // of the most recent sysAlloc.
- nbytes += (nbytes + Round) & ~Round;
- if(bloc == (byte*)v+nbytes)
- bloc -= nbytes;
- runtime·unlock(&memlock);
-}
-
-void
-runtime·SysUnused(void *v, uintptr nbytes)
-{
- USED(v, nbytes);
-}
-
-void
-runtime·SysUsed(void *v, uintptr nbytes)
-{
- USED(v, nbytes);
-}
-
-void
-runtime·SysMap(void *v, uintptr nbytes, bool reserved, uint64 *stat)
-{
- // SysReserve has already allocated all heap memory,
- // but has not adjusted stats.
- USED(v, reserved);
- runtime·xadd64(stat, nbytes);
-}
-
-void
-runtime·SysFault(void *v, uintptr nbytes)
-{
- USED(v, nbytes);
-}
-
-void*
-runtime·SysReserve(void *v, uintptr nbytes, bool *reserved)
-{
- USED(v);
- *reserved = true;
- return brk(nbytes);
-}
diff --git a/src/runtime/mem_plan9.go b/src/runtime/mem_plan9.go
new file mode 100644
index 0000000..a5d7c1a
--- /dev/null
+++ b/src/runtime/mem_plan9.go
@@ -0,0 +1,70 @@
+// Copyright 2010 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"
+
+var bloc uintptr
+var memlock mutex
+
+const memRound = _PAGESIZE - 1
+
+func initBloc() {
+ bloc = uintptr(unsafe.Pointer(&end))
+}
+
+func sbrk(n uintptr) unsafe.Pointer {
+ lock(&memlock)
+ // Plan 9 sbrk from /sys/src/libc/9sys/sbrk.c
+ bl := (bloc + memRound) &^ memRound
+ if brk_(unsafe.Pointer(bl+n)) < 0 {
+ unlock(&memlock)
+ return nil
+ }
+ bloc = bl + n
+ unlock(&memlock)
+ return unsafe.Pointer(bl)
+}
+
+func sysAlloc(n uintptr, stat *uint64) unsafe.Pointer {
+ p := sbrk(n)
+ if p != nil {
+ xadd64(stat, int64(n))
+ }
+ return p
+}
+
+func sysFree(v unsafe.Pointer, n uintptr, stat *uint64) {
+ xadd64(stat, -int64(n))
+ lock(&memlock)
+ // from tiny/mem.c
+ // Push pointer back if this is a free
+ // of the most recent sysAlloc.
+ n += (n + memRound) &^ memRound
+ if bloc == uintptr(v)+n {
+ bloc -= n
+ }
+ unlock(&memlock)
+}
+
+func sysUnused(v unsafe.Pointer, n uintptr) {
+}
+
+func sysUsed(v unsafe.Pointer, n uintptr) {
+}
+
+func sysMap(v unsafe.Pointer, n uintptr, reserved bool, stat *uint64) {
+ // sysReserve has already allocated all heap memory,
+ // but has not adjusted stats.
+ xadd64(stat, int64(n))
+}
+
+func sysFault(v unsafe.Pointer, n uintptr) {
+}
+
+func sysReserve(v unsafe.Pointer, n uintptr, reserved *bool) unsafe.Pointer {
+ *reserved = true
+ return sbrk(n)
+}
diff --git a/src/runtime/netpoll_stub.c b/src/runtime/netpoll_stub.go
similarity index 80%
rename from src/runtime/netpoll_stub.c
rename to src/runtime/netpoll_stub.go
index b7a8f29..6c7e79e 100644
--- a/src/runtime/netpoll_stub.c
+++ b/src/runtime/netpoll_stub.go
@@ -4,15 +4,12 @@
// +build plan9
-#include "runtime.h"
+package runtime
// Polls for ready network connections.
// Returns list of goroutines that become runnable.
-G*
-runtime·netpoll(bool block)
-{
+func netpoll(block bool) (gp *g) {
// Implementation for platforms that do not support
// integrated network poller.
- USED(block);
- return nil;
+ return
}
diff --git a/src/runtime/os1_plan9.go b/src/runtime/os1_plan9.go
new file mode 100644
index 0000000..0f8da03
--- /dev/null
+++ b/src/runtime/os1_plan9.go
@@ -0,0 +1,270 @@
+// Copyright 2010 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"
+
+// Called to initialize a new m (including the bootstrap m).
+// Called on the parent thread (main thread in case of bootstrap), can allocate memory.
+func mpreinit(mp *m) {
+ // Initialize stack and goroutine for note handling.
+ mp.gsignal = malg(32 * 1024)
+ mp.gsignal.m = mp
+ mp.notesig = (*int8)(mallocgc(_ERRMAX, nil, _FlagNoScan))
+ // Initialize stack for handling strings from the
+ // errstr system call, as used in package syscall.
+ mp.errstr = (*byte)(mallocgc(_ERRMAX, nil, _FlagNoScan))
+}
+
+// Called to initialize a new m (including the bootstrap m).
+// Called on the new thread, can not allocate memory.
+func minit() {
+ // Mask all SSE floating-point exceptions
+ // when running on the 64-bit kernel.
+ setfpmasks()
+}
+
+// Called from dropm to undo the effect of an minit.
+func unminit() {
+}
+
+var sysstat = []byte("/dev/sysstat\x00")
+
+func getproccount() int32 {
+ var buf [2048]byte
+ fd := open(&sysstat[0], _OREAD, 0)
+ if fd < 0 {
+ return 1
+ }
+ ncpu := int32(0)
+ for {
+ n := read(fd, unsafe.Pointer(&buf), int32(len(buf)))
+ if n <= 0 {
+ break
+ }
+ for i := int32(0); i < n; i++ {
+ if buf[i] == '\n' {
+ ncpu++
+ }
+ }
+ }
+ close(fd)
+ if ncpu == 0 {
+ ncpu = 1
+ }
+ return ncpu
+}
+
+var pid = []byte("#c/pid\x00")
+
+func getpid() uint64 {
+ var b [20]byte
+ fd := open(&pid[0], 0, 0)
+ if fd >= 0 {
+ read(fd, unsafe.Pointer(&b), int32(len(b)))
+ close(fd)
+ }
+ c := b[:]
+ for c[0] == ' ' || c[0] == '\t' {
+ c = c[1:]
+ }
+ return uint64(atoi(c))
+}
+
+func osinit() {
+ initBloc()
+ ncpu = getproccount()
+ getg().m.procid = getpid()
+ notify(unsafe.Pointer(funcPC(sigtramp)))
+}
+
+func crash() {
+ notify(nil)
+ *(*int)(nil) = 0
+}
+
+var random_data [_HashRandomBytes]byte
+var random_dev = []byte("/dev/random\x00")
+
+//go:nosplit
+func get_random_data(rnd *unsafe.Pointer, rnd_len *int32) {
+ fd := open(&random_dev[0], 0 /* O_RDONLY */, 0)
+ if read(fd, unsafe.Pointer(&random_data), _HashRandomBytes) == _HashRandomBytes {
+ *rnd = unsafe.Pointer(&random_data[0])
+ *rnd_len = _HashRandomBytes
+ } else {
+ *rnd = nil
+ *rnd_len = 0
+ }
+ close(fd)
+}
+
+func goenvs() {
+}
+
+func initsig() {
+}
+
+//go:nosplit
+func osyield() {
+ sleep(0)
+}
+
+//go:nosplit
+func usleep(µs uint32) {
+ ms := int32(µs / 1000)
+ if ms == 0 {
+ ms = 1
+ }
+ sleep(ms)
+}
+
+//go:nosplit
+func nanotime() int64 {
+ var scratch int64
+ ns := nsec(&scratch)
+ // TODO(aram): remove hack after I fix _nsec in the pc64 kernel.
+ if ns == 0 {
+ return scratch
+ }
+ return ns
+}
+
+//go:nosplit
+func itoa(buf []byte, val uint64) []byte {
+ i := len(buf) - 1
+ for val >= 10 {
+ buf[i] = byte(val%10 + '0')
+ i--
+ val /= 10
+ }
+ buf[i] = byte(val + '0')
+ return buf[i:]
+}
+
+var goexits = []byte("go: exit ")
+
+func goexitsall(status *byte) {
+ var buf [_ERRMAX]byte
+ n := copy(buf[:], goexits)
+ n = copy(buf[n:], gostringnocopy(status))
+ pid := getpid()
+ for mp := (*m)(atomicloadp(unsafe.Pointer(&allm))); mp != nil; mp = mp.alllink {
+ if mp.procid != pid {
+ postnote(mp.procid, buf[:])
+ }
+ }
+}
+
+var procdir = []byte("/proc/")
+var notefile = []byte("/note\x00")
+
+func postnote(pid uint64, msg []byte) int {
+ var buf [128]byte
+ var tmp [32]byte
+ n := copy(buf[:], procdir)
+ n += copy(buf[n:], itoa(tmp[:], pid))
+ copy(buf[n:], notefile)
+ fd := open(&buf[0], _OWRITE, 0)
+ if fd < 0 {
+ return -1
+ }
+ len := findnull(&msg[0])
+ if write(uintptr(fd), (unsafe.Pointer)(&msg[0]), int32(len)) != int64(len) {
+ close(fd)
+ return -1
+ }
+ close(fd)
+ return 0
+}
+
+//go:nosplit
+func exit(e int) {
+ var status []byte
+ if e == 0 {
+ status = []byte("\x00")
+ } else {
+ // build error string
+ var tmp [32]byte
+ status = []byte(gostringnocopy(&itoa(tmp[:], uint64(e))[0]) + "\x00")
+ }
+ goexitsall(&status[0])
+ exits(&status[0])
+}
+
+func newosproc(mp *m, stk unsafe.Pointer) {
+ if false {
+ print("newosproc mp=", mp, " ostk=", &mp, "\n")
+ }
+ pid := rfork(_RFPROC | _RFMEM | _RFNOWAIT)
+ if pid < 0 {
+ gothrow("newosproc: rfork failed")
+ }
+ if pid == 0 {
+ tstart_plan9(mp)
+ }
+}
+
+//go:nosplit
+func semacreate() uintptr {
+ return 1
+}
+
+//go:nosplit
+func semasleep(ns int64) int {
+ _g_ := getg()
+ if ns >= 0 {
+ ms := timediv(ns, 1000000, nil)
+ if ms == 0 {
+ ms = 1
+ }
+ ret := plan9_tsemacquire(&_g_.m.waitsemacount, ms)
+ if ret == 1 {
+ return 0 // success
+ }
+ return -1 // timeout or interrupted
+ }
+ for plan9_semacquire(&_g_.m.waitsemacount, 1) < 0 {
+ // interrupted; try again (c.f. lock_sema.go)
+ }
+ return 0 // success
+}
+
+//go:nosplit
+func semawakeup(mp *m) {
+ plan9_semrelease(&mp.waitsemacount, 1)
+}
+
+//go:nosplit
+func read(fd int32, buf unsafe.Pointer, n int32) int32 {
+ return pread(fd, buf, n, -1)
+}
+
+//go:nosplit
+func write(fd uintptr, buf unsafe.Pointer, n int32) int64 {
+ return int64(pwrite(int32(fd), buf, n, -1))
+}
+
+func memlimit() uint64 {
+ return 0
+}
+
+var _badsignal = []byte("runtime: signal received on thread not created by Go.\n")
+
+// This runs on a foreign stack, without an m or a g. No stack split.
+//go:nosplit
+func badsignal2() {
+ pwrite(2, unsafe.Pointer(&_badsignal[0]), int32(len(_badsignal)), -1)
+ exits(&_badsignal[0])
+}
+
+func atoi(b []byte) int {
+ n := 0
+ for len(b) > 0 && '0' <= b[0] && b[0] <= '9' {
+ n = n*10 + int(b[0]) - '0'
+ b = b[1:]
+ }
+ return n
+}
diff --git a/src/runtime/os2_plan9.go b/src/runtime/os2_plan9.go
new file mode 100644
index 0000000..f64f4c8
--- /dev/null
+++ b/src/runtime/os2_plan9.go
@@ -0,0 +1,72 @@
+// Copyright 2010 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.
+
+// Plan 9-specific system calls
+
+package runtime
+
+// open
+const (
+ _OREAD = 0
+ _OWRITE = 1
+ _ORDWR = 2
+ _OEXEC = 3
+ _OTRUNC = 16
+ _OCEXEC = 32
+ _ORCLOSE = 64
+ _OEXCL = 0x1000
+)
+
+// rfork
+const (
+ _RFNAMEG = 1 << 0
+ _RFENVG = 1 << 1
+ _RFFDG = 1 << 2
+ _RFNOTEG = 1 << 3
+ _RFPROC = 1 << 4
+ _RFMEM = 1 << 5
+ _RFNOWAIT = 1 << 6
+ _RFCNAMEG = 1 << 10
+ _RFCENVG = 1 << 11
+ _RFCFDG = 1 << 12
+ _RFREND = 1 << 13
+ _RFNOMNT = 1 << 14
+)
+
+// notify
+const (
+ _NCONT = 0
+ _NDFLT = 1
+)
+
+type uinptr _Plink
+
+type tos struct {
+ prof struct { // Per process profiling
+ pp *_Plink // known to be 0(ptr)
+ next *_Plink // known to be 4(ptr)
+ last *_Plink
+ first *_Plink
+ pid uint32
+ what uint32
+ }
+ cyclefreq uint64 // cycle clock frequency if there is one, 0 otherwise
+ kcycles int64 // cycles spent in kernel
+ pcycles int64 // cycles spent in process (kernel + user)
+ pid uint32 // might as well put the pid here
+ clock uint32
+ // top of stack is here
+}
+
+const (
+ _NSIG = 14 // number of signals in sigtable array
+ _ERRMAX = 128 // max length of note string
+
+ // Notes in runtime·sigtab that are handled by runtime·sigpanic.
+ _SIGRFAULT = 2
+ _SIGWFAULT = 3
+ _SIGINTDIV = 4
+ _SIGFLOAT = 5
+ _SIGTRAP = 6
+)
diff --git a/src/runtime/os_plan9.c b/src/runtime/os_plan9.c
deleted file mode 100644
index f8c543f6..0000000
--- a/src/runtime/os_plan9.c
+++ /dev/null
@@ -1,362 +0,0 @@
-// Copyright 2010 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.
-
-#include "runtime.h"
-#include "os_GOOS.h"
-#include "arch_GOARCH.h"
-#include "textflag.h"
-#include "malloc.h"
-
-int8 *goos = "plan9";
-extern SigTab runtime·sigtab[];
-
-int32 runtime·postnote(int32, int8*);
-
-// Called to initialize a new m (including the bootstrap m).
-// Called on the parent thread (main thread in case of bootstrap), can allocate memory.
-void
-runtime·mpreinit(M *mp)
-{
- // Initialize stack and goroutine for note handling.
- mp->gsignal = runtime·malg(32*1024);
- mp->gsignal->m = mp;
- mp->notesig = (int8*)runtime·mallocgc(ERRMAX*sizeof(int8), nil, FlagNoScan);
-
- // Initialize stack for handling strings from the
- // errstr system call, as used in package syscall.
- mp->errstr = (byte*)runtime·mallocgc(ERRMAX*sizeof(byte), nil, FlagNoScan);
-}
-
-// Called to initialize a new m (including the bootstrap m).
-// Called on the new thread, can not allocate memory.
-void
-runtime·minit(void)
-{
- // Mask all SSE floating-point exceptions
- // when running on the 64-bit kernel.
- runtime·setfpmasks();
-}
-
-// Called from dropm to undo the effect of an minit.
-void
-runtime·unminit(void)
-{
-}
-
-
-static int32
-getproccount(void)
-{
- int32 fd, i, n, ncpu;
- byte buf[2048];
-
- fd = runtime·open("/dev/sysstat", OREAD, 0);
- if(fd < 0)
- return 1;
- ncpu = 0;
- for(;;) {
- n = runtime·read(fd, buf, sizeof buf);
- if(n <= 0)
- break;
- for(i = 0; i < n; i++) {
- if(buf[i] == '\n')
- ncpu++;
- }
- }
- runtime·close(fd);
- return ncpu > 0 ? ncpu : 1;
-}
-
-static int32
-getpid(void)
-{
- byte b[20], *c;
- int32 fd;
-
- runtime·memclr(b, sizeof(b));
- fd = runtime·open("#c/pid", 0, 0);
- if(fd >= 0) {
- runtime·read(fd, b, sizeof(b));
- runtime·close(fd);
- }
- c = b;
- while(*c == ' ' || *c == '\t')
- c++;
- return runtime·atoi(c);
-}
-
-void
-runtime·osinit(void)
-{
- runtime·ncpu = getproccount();
- g->m->procid = getpid();
- runtime·notify(runtime·sigtramp);
-}
-
-void
-runtime·crash(void)
-{
- runtime·notify(nil);
- *(int32*)0 = 0;
-}
-
-#pragma textflag NOSPLIT
-void
-runtime·get_random_data(byte **rnd, int32 *rnd_len)
-{
- static byte random_data[HashRandomBytes];
- int32 fd;
-
- fd = runtime·open("/dev/random", 0 /* O_RDONLY */, 0);
- if(runtime·read(fd, random_data, HashRandomBytes) == HashRandomBytes) {
- *rnd = random_data;
- *rnd_len = HashRandomBytes;
- } else {
- *rnd = nil;
- *rnd_len = 0;
- }
- runtime·close(fd);
-}
-
-void
-runtime·goenvs(void)
-{
-}
-
-void
-runtime·initsig(void)
-{
-}
-
-#pragma textflag NOSPLIT
-void
-runtime·osyield(void)
-{
- runtime·sleep(0);
-}
-
-#pragma textflag NOSPLIT
-void
-runtime·usleep(uint32 µs)
-{
- uint32 ms;
-
- ms = µs/1000;
- if(ms == 0)
- ms = 1;
- runtime·sleep(ms);
-}
-
-#pragma textflag NOSPLIT
-int64
-runtime·nanotime(void)
-{
- int64 ns, scratch;
-
- ns = runtime·nsec(&scratch);
- // TODO(aram): remove hack after I fix _nsec in the pc64 kernel.
- if(ns == 0)
- return scratch;
- return ns;
-}
-
-#pragma textflag NOSPLIT
-void
-runtime·itoa(int32 n, byte *p, uint32 len)
-{
- byte *q, c;
- uint32 i;
-
- if(len <= 1)
- return;
-
- runtime·memclr(p, len);
- q = p;
-
- if(n==0) {
- *q++ = '0';
- USED(q);
- return;
- }
- if(n < 0) {
- *q++ = '-';
- p++;
- n = -n;
- }
- for(i=0; n > 0 && i < len; i++) {
- *q++ = '0' + (n%10);
- n = n/10;
- }
- for(q--; q >= p; ) {
- c = *p;
- *p++ = *q;
- *q-- = c;
- }
-}
-
-void
-runtime·goexitsall(int8 *status)
-{
- int8 buf[ERRMAX];
- M *mp;
- int32 pid;
-
- runtime·snprintf((byte*)buf, sizeof buf, "go: exit %s", status);
- pid = getpid();
- for(mp=runtime·atomicloadp(&runtime·allm); mp; mp=mp->alllink)
- if(mp->procid != pid)
- runtime·postnote(mp->procid, buf);
-}
-
-int32
-runtime·postnote(int32 pid, int8* msg)
-{
- int32 fd;
- intgo len;
- uint8 buf[128];
- uint8 tmp[16];
- uint8 *p, *q;
-
- runtime·memclr(buf, sizeof buf);
-
- /* build path string /proc/pid/note */
- q = tmp;
- p = buf;
- runtime·itoa(pid, tmp, sizeof tmp);
- runtime·memmove((void*)p, (void*)"/proc/", 6);
- for(p += 6; *p++ = *q++; );
- p--;
- runtime·memmove((void*)p, (void*)"/note", 5);
-
- fd = runtime·open((int8*)buf, OWRITE, 0);
- if(fd < 0)
- return -1;
-
- len = runtime·findnull((byte*)msg);
- if(runtime·write(fd, msg, len) != len) {
- runtime·close(fd);
- return -1;
- }
- runtime·close(fd);
- return 0;
-}
-
-static void exit(void);
-
-#pragma textflag NOSPLIT
-void
-runtime·exit(int32 e)
-{
- void (*fn)(void);
-
- g->m->scalararg[0] = e;
- fn = exit;
- runtime·onM(&fn);
-}
-
-static void
-exit(void)
-{
- int32 e;
- byte tmp[16];
- int8 *status;
-
- e = g->m->scalararg[0];
- g->m->scalararg[0] = 0;
-
- if(e == 0)
- status = "";
- else {
- /* build error string */
- runtime·itoa(e, tmp, sizeof tmp);
- status = (int8*)tmp;
- }
-
- runtime·goexitsall(status);
- runtime·exits(status);
-}
-
-void
-runtime·newosproc(M *mp, void *stk)
-{
- int32 pid;
-
- if(0)
- runtime·printf("newosproc mp=%p ostk=%p\n", mp, &mp);
-
- USED(stk);
- if((pid = runtime·rfork(RFPROC|RFMEM|RFNOWAIT)) < 0)
- runtime·throw("newosproc: rfork failed\n");
- if(pid == 0)
- runtime·tstart_plan9(mp);
-}
-
-#pragma textflag NOSPLIT
-uintptr
-runtime·semacreate(void)
-{
- return 1;
-}
-
-#pragma textflag NOSPLIT
-int32
-runtime·semasleep(int64 ns)
-{
- int32 ret;
- int32 ms;
-
- if(ns >= 0) {
- ms = runtime·timediv(ns, 1000000, nil);
- if(ms == 0)
- ms = 1;
- ret = runtime·plan9_tsemacquire(&g->m->waitsemacount, ms);
- if(ret == 1)
- return 0; // success
- return -1; // timeout or interrupted
- }
-
- while(runtime·plan9_semacquire(&g->m->waitsemacount, 1) < 0) {
- /* interrupted; try again (c.f. lock_sema.c) */
- }
- return 0; // success
-}
-
-#pragma textflag NOSPLIT
-void
-runtime·semawakeup(M *mp)
-{
- runtime·plan9_semrelease(&mp->waitsemacount, 1);
-}
-
-#pragma textflag NOSPLIT
-int32
-runtime·read(int32 fd, void *buf, int32 nbytes)
-{
- return runtime·pread(fd, buf, nbytes, -1LL);
-}
-
-#pragma textflag NOSPLIT
-int32
-runtime·write(uintptr fd, void *buf, int32 nbytes)
-{
- return runtime·pwrite((int32)fd, buf, nbytes, -1LL);
-}
-
-uintptr
-runtime·memlimit(void)
-{
- return 0;
-}
-
-#pragma dataflag NOPTR
-static int8 badsignal[] = "runtime: signal received on thread not created by Go.\n";
-
-// This runs on a foreign stack, without an m or a g. No stack split.
-#pragma textflag NOSPLIT
-void
-runtime·badsignal2(void)
-{
- runtime·pwrite(2, badsignal, sizeof badsignal - 1, -1LL);
- runtime·exits(badsignal);
-}
diff --git a/src/runtime/os_plan9.go b/src/runtime/os_plan9.go
index 20e47bf..2dcdfc0 100644
--- a/src/runtime/os_plan9.go
+++ b/src/runtime/os_plan9.go
@@ -6,22 +6,49 @@
import "unsafe"
+//go:noescape
func pread(fd int32, buf unsafe.Pointer, nbytes int32, offset int64) int32
+
+//go:noescape
func pwrite(fd int32, buf unsafe.Pointer, nbytes int32, offset int64) int32
+
func seek(fd int32, offset int64, whence int32) int64
+
+//go:noescape
func exits(msg *byte)
+
+//go:noescape
func brk_(addr unsafe.Pointer) uintptr
+
func sleep(ms int32) int32
+
func rfork(flags int32) int32
+
+//go:noescape
func plan9_semacquire(addr *uint32, block int32) int32
+
+//go:noescape
func plan9_tsemacquire(addr *uint32, ms int32) int32
+
+//go:noescape
func plan9_semrelease(addr *uint32, count int32) int32
+
+//go:noescape
func notify(fn unsafe.Pointer) int32
+
func noted(mode int32) int32
+
+//go:noescape
func nsec(*int64) int64
+
+//go:noescape
func sigtramp(ureg, msg unsafe.Pointer)
+
func setfpmasks()
+
+//go:noescape
func tstart_plan9(newm *m)
+
func errstr() string
type _Plink uintptr
diff --git a/src/runtime/os_plan9.h b/src/runtime/os_plan9.h
deleted file mode 100644
index 6d18024..0000000
--- a/src/runtime/os_plan9.h
+++ /dev/null
@@ -1,93 +0,0 @@
-// Copyright 2010 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.
-
-// Plan 9-specific system calls
-int32 runtime·pread(int32 fd, void *buf, int32 nbytes, int64 offset);
-int32 runtime·pwrite(int32 fd, void *buf, int32 nbytes, int64 offset);
-int64 runtime·seek(int32 fd, int64 offset, int32 whence);
-void runtime·exits(int8* msg);
-intptr runtime·brk_(void*);
-int32 runtime·sleep(int32 ms);
-int32 runtime·rfork(int32 flags);
-int32 runtime·plan9_semacquire(uint32 *addr, int32 block);
-int32 runtime·plan9_tsemacquire(uint32 *addr, int32 ms);
-int32 runtime·plan9_semrelease(uint32 *addr, int32 count);
-int32 runtime·notify(void (*fn)(void*, int8*));
-int32 runtime·noted(int32);
-int64 runtime·nsec(int64*);
-void runtime·sigtramp(void*, int8*);
-void runtime·sigpanic(void);
-void runtime·goexitsall(int8*);
-void runtime·setfpmasks(void);
-void runtime·tstart_plan9(M *newm);
-
-/* open */
-enum
-{
- OREAD = 0,
- OWRITE = 1,
- ORDWR = 2,
- OEXEC = 3,
- OTRUNC = 16,
- OCEXEC = 32,
- ORCLOSE = 64,
- OEXCL = 0x1000
-};
-
-/* rfork */
-enum
-{
- RFNAMEG = (1<<0),
- RFENVG = (1<<1),
- RFFDG = (1<<2),
- RFNOTEG = (1<<3),
- RFPROC = (1<<4),
- RFMEM = (1<<5),
- RFNOWAIT = (1<<6),
- RFCNAMEG = (1<<10),
- RFCENVG = (1<<11),
- RFCFDG = (1<<12),
- RFREND = (1<<13),
- RFNOMNT = (1<<14)
-};
-
-/* notify */
-enum
-{
- NCONT = 0,
- NDFLT = 1
-};
-
-typedef struct Tos Tos;
-typedef intptr _Plink;
-
-struct Tos {
- struct TosProf /* Per process profiling */
- {
- _Plink *pp; /* known to be 0(ptr) */
- _Plink *next; /* known to be 4(ptr) */
- _Plink *last;
- _Plink *first;
- uint32 pid;
- uint32 what;
- } prof;
- uint64 cyclefreq; /* cycle clock frequency if there is one, 0 otherwise */
- int64 kcycles; /* cycles spent in kernel */
- int64 pcycles; /* cycles spent in process (kernel + user) */
- uint32 pid; /* might as well put the pid here */
- uint32 clock;
- /* top of stack is here */
-};
-
-enum {
- NSIG = 14, /* number of signals in runtime·SigTab array */
- ERRMAX = 128, /* max length of note string */
-
- /* Notes in runtime·sigtab that are handled by runtime·sigpanic. */
- SIGRFAULT = 2,
- SIGWFAULT = 3,
- SIGINTDIV = 4,
- SIGFLOAT = 5,
- SIGTRAP = 6,
-};
diff --git a/src/runtime/os_plan9_386.c b/src/runtime/os_plan9_386.c
deleted file mode 100644
index 42c6d16..0000000
--- a/src/runtime/os_plan9_386.c
+++ /dev/null
@@ -1,150 +0,0 @@
-// Copyright 2010 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.
-
-#include "runtime.h"
-#include "defs_GOOS_GOARCH.h"
-#include "os_GOOS.h"
-#include "signals_GOOS.h"
-
-void
-runtime·dumpregs(Ureg *u)
-{
- runtime·printf("ax %x\n", u->ax);
- runtime·printf("bx %x\n", u->bx);
- runtime·printf("cx %x\n", u->cx);
- runtime·printf("dx %x\n", u->dx);
- runtime·printf("di %x\n", u->di);
- runtime·printf("si %x\n", u->si);
- runtime·printf("bp %x\n", u->bp);
- runtime·printf("sp %x\n", u->sp);
- runtime·printf("pc %x\n", u->pc);
- runtime·printf("flags %x\n", u->flags);
- runtime·printf("cs %x\n", u->cs);
- runtime·printf("fs %x\n", u->fs);
- runtime·printf("gs %x\n", u->gs);
-}
-
-int32
-runtime·sighandler(void *v, int8 *note, G *gp)
-{
- uintptr *sp;
- SigTab *t;
- bool crash;
- Ureg *ureg;
- intgo len, n;
- int32 sig, flags;
-
- ureg = (Ureg*)v;
-
- // The kernel will never pass us a nil note or ureg so we probably
- // made a mistake somewhere in runtime·sigtramp.
- if(ureg == nil || note == nil) {
- runtime·printf("sighandler: ureg %p note %p\n", ureg, note);
- goto Throw;
- }
-
- // Check that the note is no more than ERRMAX bytes (including
- // the trailing NUL). We should never receive a longer note.
- len = runtime·findnull((byte*)note);
- if(len > ERRMAX-1) {
- runtime·printf("sighandler: note is longer than ERRMAX\n");
- goto Throw;
- }
-
- // See if the note matches one of the patterns in runtime·sigtab.
- // Notes that do not match any pattern can be handled at a higher
- // level by the program but will otherwise be ignored.
- flags = SigNotify;
- for(sig = 0; sig < nelem(runtime·sigtab); sig++) {
- t = &runtime·sigtab[sig];
- n = runtime·findnull((byte*)t->name);
- if(len < n)
- continue;
- if(runtime·strncmp((byte*)note, (byte*)t->name, n) == 0) {
- flags = t->flags;
- break;
- }
- }
-
- if(flags & SigGoExit)
- runtime·exits(note+9); // Strip "go: exit " prefix.
-
- if(flags & SigPanic) {
- // Copy the error string from sigtramp's stack into m->notesig so
- // we can reliably access it from the panic routines.
- runtime·memmove(g->m->notesig, note, len+1);
-
- gp->sig = sig;
- gp->sigpc = ureg->pc;
-
- // Only push runtime·sigpanic if PC != 0.
- //
- // If PC == 0, probably panicked because of a call to a nil func.
- // Not pushing that onto SP will make the trace look like a call
- // to runtime·sigpanic instead. (Otherwise the trace will end at
- // runtime·sigpanic and we won't get to see who faulted).
- if(ureg->pc != 0) {
- sp = (uintptr*)ureg->sp;
- *--sp = ureg->pc;
- ureg->sp = (uint32)sp;
- }
- ureg->pc = (uintptr)runtime·sigpanic;
- return NCONT;
- }
-
- if(flags & SigNotify) {
- // TODO(ality): See if os/signal wants it.
- //if(runtime·sigsend(...))
- // return NCONT;
- }
- if(flags & SigKill)
- goto Exit;
- if(!(flags & SigThrow))
- return NCONT;
-
-Throw:
- g->m->throwing = 1;
- g->m->caughtsig = gp;
- runtime·startpanic();
-
- runtime·printf("%s\n", note);
- runtime·printf("PC=%x\n", ureg->pc);
- runtime·printf("\n");
-
- if(runtime·gotraceback(&crash)) {
- runtime·goroutineheader(gp);
- runtime·tracebacktrap(ureg->pc, ureg->sp, 0, gp);
- runtime·tracebackothers(gp);
- runtime·printf("\n");
- runtime·dumpregs(ureg);
- }
-
- if(crash)
- runtime·crash();
-
-Exit:
- runtime·goexitsall(note);
- runtime·exits(note);
- return NDFLT; // not reached
-}
-
-void
-runtime·sigenable(uint32 sig)
-{
- USED(sig);
-}
-
-void
-runtime·sigdisable(uint32 sig)
-{
- USED(sig);
-}
-
-void
-runtime·resetcpuprofiler(int32 hz)
-{
- // TODO: Enable profiling interrupts.
-
- g->m->profilehz = hz;
-}
diff --git a/src/runtime/os_plan9_386.go b/src/runtime/os_plan9_386.go
new file mode 100644
index 0000000..7dda139
--- /dev/null
+++ b/src/runtime/os_plan9_386.go
@@ -0,0 +1,131 @@
+// Copyright 2010 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"
+
+func dumpregs(u *ureg) {
+ print("ax ", hex(u.ax), "\n")
+ print("bx ", hex(u.bx), "\n")
+ print("cx ", hex(u.cx), "\n")
+ print("dx ", hex(u.dx), "\n")
+ print("di ", hex(u.di), "\n")
+ print("si ", hex(u.si), "\n")
+ print("bp ", hex(u.bp), "\n")
+ print("sp ", hex(u.sp), "\n")
+ print("pc ", hex(u.pc), "\n")
+ print("flags ", hex(u.flags), "\n")
+ print("cs ", hex(u.cs), "\n")
+ print("fs ", hex(u.fs), "\n")
+ print("gs ", hex(u.gs), "\n")
+}
+
+func sighandler(_ureg *ureg, note *byte, gp *g) int {
+ _g_ := getg()
+ var t sigTabT
+ var docrash bool
+ var length int
+ var sig int
+ var flags int
+
+ // The kernel will never pass us a nil note or ureg so we probably
+ // made a mistake somewhere in sigtramp.
+ if _ureg == nil || note == nil {
+ print("sighandler: ureg ", _ureg, " note ", note, "\n")
+ goto Throw
+ }
+ // Check that the note is no more than ERRMAX bytes (including
+ // the trailing NUL). We should never receive a longer note.
+ length = findnull(note)
+ if length > _ERRMAX-1 {
+ print("sighandler: note is longer than ERRMAX\n")
+ goto Throw
+ }
+ // See if the note matches one of the patterns in sigtab.
+ // Notes that do not match any pattern can be handled at a higher
+ // level by the program but will otherwise be ignored.
+ flags = _SigNotify
+ for sig, t = range sigtable {
+ n := len(t.name)
+ if length < n {
+ continue
+ }
+ if strncmp(note, &t.name[0], uintptr(n)) == 0 {
+ flags = t.flags
+ break
+ }
+ }
+ if flags&_SigGoExit != 0 {
+ exits((*byte)(add(unsafe.Pointer(note), 9))) // Strip "go: exit " prefix.
+ }
+ if flags&_SigPanic != 0 {
+ // Copy the error string from sigtramp's stack into m->notesig so
+ // we can reliably access it from the panic routines.
+ memmove(unsafe.Pointer(_g_.m.notesig), unsafe.Pointer(note), uintptr(length+1))
+ gp.sig = uint32(sig)
+ gp.sigpc = uintptr(_ureg.pc)
+ // Only push sigpanic if PC != 0.
+ //
+ // If PC == 0, probably panicked because of a call to a nil func.
+ // Not pushing that onto SP will make the trace look like a call
+ // to sigpanic instead. (Otherwise the trace will end at
+ // sigpanic and we won't get to see who faulted).
+ if _ureg.pc != 0 {
+ sp := _ureg.sp
+ if regSize > ptrSize {
+ sp -= ptrSize
+ *(*uintptr)(unsafe.Pointer(uintptr(sp))) = 0
+ }
+ sp -= ptrSize
+ *(*uintptr)(unsafe.Pointer(uintptr(sp))) = uintptr(_ureg.pc)
+ _ureg.sp = sp
+ }
+ _ureg.pc = uint32(funcPC(sigpanic))
+ return _NCONT
+ }
+ if flags&_SigNotify != 0 {
+ // TODO(ality): See if os/signal wants it.
+ //if(sigsend(...))
+ // return _NCONT;
+ }
+ if flags&_SigKill != 0 {
+ goto Exit
+ }
+ if flags&_SigThrow == 0 {
+ return _NCONT
+ }
+Throw:
+ _g_.m.throwing = 1
+ _g_.m.caughtsig = gp
+ startpanic()
+ print(gostringnocopy(note), "\n")
+ print("PC=", hex(_ureg.pc), "\n")
+ print("\n")
+ if gotraceback(&docrash) > 0 {
+ goroutineheader(gp)
+ tracebacktrap(uintptr(_ureg.pc), uintptr(_ureg.sp), 0, gp)
+ tracebackothers(gp)
+ print("\n")
+ dumpregs(_ureg)
+ }
+ if docrash {
+ crash()
+ }
+Exit:
+ goexitsall(note)
+ exits(note)
+ return _NDFLT // not reached
+}
+
+func sigenable(sig uint32) {
+}
+
+func sigdisable(sig uint32) {
+}
+
+func resetcpuprofiler(hz int32) {
+ // TODO: Enable profiling interrupts.
+ getg().m.profilehz = hz
+}
diff --git a/src/runtime/os_plan9_amd64.c b/src/runtime/os_plan9_amd64.c
deleted file mode 100644
index a9dc0eb..0000000
--- a/src/runtime/os_plan9_amd64.c
+++ /dev/null
@@ -1,158 +0,0 @@
-// Copyright 2010 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.
-
-#include "runtime.h"
-#include "defs_GOOS_GOARCH.h"
-#include "os_GOOS.h"
-#include "signals_GOOS.h"
-
-void
-runtime·dumpregs(Ureg *u)
-{
- runtime·printf("ax %X\n", u->ax);
- runtime·printf("bx %X\n", u->bx);
- runtime·printf("cx %X\n", u->cx);
- runtime·printf("dx %X\n", u->dx);
- runtime·printf("di %X\n", u->di);
- runtime·printf("si %X\n", u->si);
- runtime·printf("bp %X\n", u->bp);
- runtime·printf("sp %X\n", u->sp);
- runtime·printf("r8 %X\n", u->r8);
- runtime·printf("r9 %X\n", u->r9);
- runtime·printf("r10 %X\n", u->r10);
- runtime·printf("r11 %X\n", u->r11);
- runtime·printf("r12 %X\n", u->r12);
- runtime·printf("r13 %X\n", u->r13);
- runtime·printf("r14 %X\n", u->r14);
- runtime·printf("r15 %X\n", u->r15);
- runtime·printf("ip %X\n", u->ip);
- runtime·printf("flags %X\n", u->flags);
- runtime·printf("cs %X\n", (uint64)u->cs);
- runtime·printf("fs %X\n", (uint64)u->fs);
- runtime·printf("gs %X\n", (uint64)u->gs);
-}
-
-int32
-runtime·sighandler(void *v, int8 *note, G *gp)
-{
- uintptr *sp;
- SigTab *t;
- bool crash;
- Ureg *ureg;
- intgo len, n;
- int32 sig, flags;
-
- ureg = (Ureg*)v;
-
- // The kernel will never pass us a nil note or ureg so we probably
- // made a mistake somewhere in runtime·sigtramp.
- if(ureg == nil || note == nil) {
- runtime·printf("sighandler: ureg %p note %p\n", ureg, note);
- goto Throw;
- }
-
- // Check that the note is no more than ERRMAX bytes (including
- // the trailing NUL). We should never receive a longer note.
- len = runtime·findnull((byte*)note);
- if(len > ERRMAX-1) {
- runtime·printf("sighandler: note is longer than ERRMAX\n");
- goto Throw;
- }
-
- // See if the note matches one of the patterns in runtime·sigtab.
- // Notes that do not match any pattern can be handled at a higher
- // level by the program but will otherwise be ignored.
- flags = SigNotify;
- for(sig = 0; sig < nelem(runtime·sigtab); sig++) {
- t = &runtime·sigtab[sig];
- n = runtime·findnull((byte*)t->name);
- if(len < n)
- continue;
- if(runtime·strncmp((byte*)note, (byte*)t->name, n) == 0) {
- flags = t->flags;
- break;
- }
- }
-
- if(flags & SigGoExit)
- runtime·exits(note+9); // Strip "go: exit " prefix.
-
- if(flags & SigPanic) {
- // Copy the error string from sigtramp's stack into m->notesig so
- // we can reliably access it from the panic routines.
- runtime·memmove(g->m->notesig, note, len+1);
-
- gp->sig = sig;
- gp->sigpc = ureg->ip;
-
- // Only push runtime·sigpanic if PC != 0.
- //
- // If PC == 0, probably panicked because of a call to a nil func.
- // Not pushing that onto SP will make the trace look like a call
- // to runtime·sigpanic instead. (Otherwise the trace will end at
- // runtime·sigpanic and we won't get to see who faulted).
- if(ureg->ip != 0) {
- sp = (uintptr*)ureg->sp;
- *--sp = ureg->ip;
- ureg->sp = (uint64)sp;
- }
- ureg->ip = (uintptr)runtime·sigpanic;
- return NCONT;
- }
-
- if(flags & SigNotify) {
- // TODO(ality): See if os/signal wants it.
- //if(runtime·sigsend(...))
- // return NCONT;
- }
- if(flags & SigKill)
- goto Exit;
- if(!(flags & SigThrow))
- return NCONT;
-
-Throw:
- g->m->throwing = 1;
- g->m->caughtsig = gp;
- runtime·startpanic();
-
- runtime·printf("%s\n", note);
- runtime·printf("PC=%X\n", ureg->ip);
- runtime·printf("\n");
-
- if(runtime·gotraceback(&crash)) {
- runtime·goroutineheader(gp);
- runtime·tracebacktrap(ureg->ip, ureg->sp, 0, gp);
- runtime·tracebackothers(gp);
- runtime·printf("\n");
- runtime·dumpregs(ureg);
- }
-
- if(crash)
- runtime·crash();
-
-Exit:
- runtime·goexitsall(note);
- runtime·exits(note);
- return NDFLT; // not reached
-}
-
-void
-runtime·sigenable(uint32 sig)
-{
- USED(sig);
-}
-
-void
-runtime·sigdisable(uint32 sig)
-{
- USED(sig);
-}
-
-void
-runtime·resetcpuprofiler(int32 hz)
-{
- // TODO: Enable profiling interrupts.
-
- g->m->profilehz = hz;
-}
diff --git a/src/runtime/os_plan9_amd64.go b/src/runtime/os_plan9_amd64.go
new file mode 100644
index 0000000..8727dcc
--- /dev/null
+++ b/src/runtime/os_plan9_amd64.go
@@ -0,0 +1,139 @@
+// Copyright 2010 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"
+
+func dumpregs(u *ureg) {
+ print("ax ", hex(u.ax), "\n")
+ print("bx ", hex(u.bx), "\n")
+ print("cx ", hex(u.cx), "\n")
+ print("dx ", hex(u.dx), "\n")
+ print("di ", hex(u.di), "\n")
+ print("si ", hex(u.si), "\n")
+ print("bp ", hex(u.bp), "\n")
+ print("sp ", hex(u.sp), "\n")
+ print("r8 ", hex(u.r8), "\n")
+ print("r9 ", hex(u.r9), "\n")
+ print("r10 ", hex(u.r10), "\n")
+ print("r11 ", hex(u.r11), "\n")
+ print("r12 ", hex(u.r12), "\n")
+ print("r13 ", hex(u.r13), "\n")
+ print("r14 ", hex(u.r14), "\n")
+ print("r15 ", hex(u.r15), "\n")
+ print("ip ", hex(u.ip), "\n")
+ print("flags ", hex(u.flags), "\n")
+ print("cs ", hex(uint64(u.cs)), "\n")
+ print("fs ", hex(uint64(u.fs)), "\n")
+ print("gs ", hex(uint64(u.gs)), "\n")
+}
+
+func sighandler(_ureg *ureg, note *byte, gp *g) int {
+ _g_ := getg()
+ var t sigTabT
+ var docrash bool
+ var length int
+ var sig int
+ var flags int
+
+ // The kernel will never pass us a nil note or ureg so we probably
+ // made a mistake somewhere in sigtramp.
+ if _ureg == nil || note == nil {
+ print("sighandler: ureg ", _ureg, " note ", note, "\n")
+ goto Throw
+ }
+ // Check that the note is no more than ERRMAX bytes (including
+ // the trailing NUL). We should never receive a longer note.
+ length = findnull(note)
+ if length > _ERRMAX-1 {
+ print("sighandler: note is longer than ERRMAX\n")
+ goto Throw
+ }
+ // See if the note matches one of the patterns in sigtab.
+ // Notes that do not match any pattern can be handled at a higher
+ // level by the program but will otherwise be ignored.
+ flags = _SigNotify
+ for sig, t = range sigtable {
+ n := len(t.name)
+ if length < n {
+ continue
+ }
+ if strncmp(note, &t.name[0], uintptr(n)) == 0 {
+ flags = t.flags
+ break
+ }
+ }
+ if flags&_SigGoExit != 0 {
+ exits((*byte)(add(unsafe.Pointer(note), 9))) // Strip "go: exit " prefix.
+ }
+ if flags&_SigPanic != 0 {
+ // Copy the error string from sigtramp's stack into m->notesig so
+ // we can reliably access it from the panic routines.
+ memmove(unsafe.Pointer(_g_.m.notesig), unsafe.Pointer(note), uintptr(length+1))
+ gp.sig = uint32(sig)
+ gp.sigpc = uintptr(_ureg.ip)
+ // Only push sigpanic if PC != 0.
+ //
+ // If PC == 0, probably panicked because of a call to a nil func.
+ // Not pushing that onto SP will make the trace look like a call
+ // to sigpanic instead. (Otherwise the trace will end at
+ // sigpanic and we won't get to see who faulted).
+ if _ureg.ip != 0 {
+ sp := _ureg.sp
+ if regSize > ptrSize {
+ sp -= ptrSize
+ *(*uintptr)(unsafe.Pointer(uintptr(sp))) = 0
+ }
+ sp -= ptrSize
+ *(*uintptr)(unsafe.Pointer(uintptr(sp))) = uintptr(_ureg.ip)
+ _ureg.sp = sp
+ }
+ _ureg.ip = uint64(funcPC(sigpanic))
+ return _NCONT
+ }
+ if flags&_SigNotify != 0 {
+ // TODO(ality): See if os/signal wants it.
+ //if(sigsend(...))
+ // return _NCONT;
+ }
+ if flags&_SigKill != 0 {
+ goto Exit
+ }
+ if flags&_SigThrow == 0 {
+ return _NCONT
+ }
+Throw:
+ _g_.m.throwing = 1
+ _g_.m.caughtsig = gp
+ startpanic()
+ print(gostringnocopy(note), "\n")
+ print("PC=", hex(_ureg.ip), "\n")
+ print("\n")
+ if gotraceback(&docrash) > 0 {
+ goroutineheader(gp)
+ tracebacktrap(uintptr(_ureg.ip), uintptr(_ureg.sp), 0, gp)
+ tracebackothers(gp)
+ print("\n")
+ dumpregs(_ureg)
+ }
+ if docrash {
+ crash()
+ }
+Exit:
+ goexitsall(note)
+ exits(note)
+ return _NDFLT // not reached
+}
+
+func sigenable(sig uint32) {
+}
+
+func sigdisable(sig uint32) {
+}
+
+func resetcpuprofiler(hz int32) {
+ // TODO: Enable profiling interrupts.
+ getg().m.profilehz = hz
+}
diff --git a/src/runtime/signal_plan9.go b/src/runtime/signal_plan9.go
new file mode 100644
index 0000000..37d2435
--- /dev/null
+++ b/src/runtime/signal_plan9.go
@@ -0,0 +1,54 @@
+// Copyright 2011 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
+
+type sigTabT struct {
+ flags int
+ name []byte
+}
+
+// Incoming notes are compared against this table using strncmp, so the
+// order matters: longer patterns must appear before their prefixes.
+// There are _SIG constants in os2_plan9.go for the table index of some
+// of these.
+//
+// If you add entries to this table, you must respect the prefix ordering
+// and also update the constant values is os2_plan9.go.
+var sigtable = [...]sigTabT{
+ // Traps that we cannot be recovered.
+ {_SigThrow, []byte("sys: trap: debug exception")},
+ {_SigThrow, []byte("sys: trap: invalid opcode")},
+
+ // We can recover from some memory errors in runtime·sigpanic.
+ {_SigPanic, []byte("sys: trap: fault read addr")}, // SIGRFAULT
+ {_SigPanic, []byte("sys: trap: fault write addr")}, // SIGWFAULT
+
+ // We can also recover from math errors.
+ {_SigPanic, []byte("sys: trap: divide error")}, // SIGINTDIV
+ {_SigPanic, []byte("sys: fp:")}, // SIGFLOAT
+
+ // All other traps are normally handled as if they were marked SigThrow.
+ // We mark them SigPanic here so that debug.SetPanicOnFault will work.
+ {_SigPanic, []byte("sys: trap:")}, // SIGTRAP
+
+ // Writes to a closed pipe can be handled if desired, otherwise they're ignored.
+ {_SigNotify, []byte("sys: write on closed pipe")},
+
+ // Other system notes are more serious and cannot be recovered.
+ {_SigThrow, []byte("sys:")},
+
+ // Issued to all other procs when calling runtime·exit.
+ {_SigGoExit, []byte("go: exit ")},
+
+ // Kill is sent by external programs to cause an exit.
+ {_SigKill, []byte("kill")},
+
+ // Interrupts can be handled if desired, otherwise they cause an exit.
+ {_SigNotify + _SigKill, []byte("interrupt")},
+ {_SigNotify + _SigKill, []byte("hangup")},
+
+ // Alarms can be handled if desired, otherwise they're ignored.
+ {_SigNotify, []byte("alarm")},
+}
diff --git a/src/runtime/signals_plan9.h b/src/runtime/signals_plan9.h
deleted file mode 100644
index 4ee8e54..0000000
--- a/src/runtime/signals_plan9.h
+++ /dev/null
@@ -1,63 +0,0 @@
-// Copyright 2011 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.
-
-#include "textflag.h"
-
-#define N SigNotify
-#define K SigKill
-#define T SigThrow
-#define P SigPanic
-#define E SigGoExit
-
-// Incoming notes are compared against this table using strncmp, so the
-// order matters: longer patterns must appear before their prefixes.
-// There are #defined SIG constants in os_plan9.h for the table index of
-// some of these.
-//
-// If you add entries to this table, you must respect the prefix ordering
-// and also update the constant values is os_plan9.h.
-
-#pragma dataflag NOPTR
-SigTab runtime·sigtab[] = {
- // Traps that we cannot be recovered.
- T, "sys: trap: debug exception",
- T, "sys: trap: invalid opcode",
-
- // We can recover from some memory errors in runtime·sigpanic.
- P, "sys: trap: fault read addr", // SIGRFAULT
- P, "sys: trap: fault write addr", // SIGWFAULT
-
- // We can also recover from math errors.
- P, "sys: trap: divide error", // SIGINTDIV
- P, "sys: fp:", // SIGFLOAT
-
- // All other traps are normally handled as if they were marked SigThrow.
- // We mark them SigPanic here so that debug.SetPanicOnFault will work.
- P, "sys: trap:", // SIGTRAP
-
- // Writes to a closed pipe can be handled if desired, otherwise they're ignored.
- N, "sys: write on closed pipe",
-
- // Other system notes are more serious and cannot be recovered.
- T, "sys:",
-
- // Issued to all other procs when calling runtime·exit.
- E, "go: exit ",
-
- // Kill is sent by external programs to cause an exit.
- K, "kill",
-
- // Interrupts can be handled if desired, otherwise they cause an exit.
- N+K, "interrupt",
- N+K, "hangup",
-
- // Alarms can be handled if desired, otherwise they're ignored.
- N, "alarm",
-};
-
-#undef N
-#undef K
-#undef T
-#undef P
-#undef E
diff --git a/src/runtime/stubs2.go b/src/runtime/stubs2.go
index 74cc5c6..60751dd 100644
--- a/src/runtime/stubs2.go
+++ b/src/runtime/stubs2.go
@@ -2,6 +2,7 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
+// +build !plan9
// +build !solaris
// +build !windows
// +build !nacl
diff --git a/src/runtime/stubs3.go b/src/runtime/stubs3.go
new file mode 100644
index 0000000..ffaa287
--- /dev/null
+++ b/src/runtime/stubs3.go
@@ -0,0 +1,12 @@
+// 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.
+
+// +build plan9
+
+package runtime
+
+func close(fd int32) int32
+
+//go:noescape
+func open(name *byte, mode, perm int32) int32
