diff options
Diffstat (limited to 'src/runtime/os_plan9.c')
-rw-r--r-- | src/runtime/os_plan9.c | 362 |
1 files changed, 0 insertions, 362 deletions
diff --git a/src/runtime/os_plan9.c b/src/runtime/os_plan9.c deleted file mode 100644 index f8c543f6f..000000000 --- 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); -} |