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runtime: openbsd amd64 runtime support

Add support for the go runtime on openbsd/amd64. This is based on
the existing freebsd runtime.

Threads are implemented using OpenBSD's rthreads, which are currently
disabled by default, however can be enabled via the kern.rthreads
sysctl.

For now, cgo is disabled.

R=rsc
CC=golang-dev
https://golang.org/cl/4815067
This commit is contained in:
Joel Sing 2011-08-08 09:56:38 -04:00 committed by Russ Cox
parent 604b91a43e
commit 21ac258e07
10 changed files with 977 additions and 0 deletions

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@ -13,6 +13,9 @@ endif
ifeq ($(GOOS),plan9) ifeq ($(GOOS),plan9)
ENABLED:=0 ENABLED:=0
endif endif
ifeq ($(GOOS),openbsd)
ENABLED:=0
endif
ifeq ($(DISABLE_CGO),1) ifeq ($(DISABLE_CGO),1)
ENABLED:=0 ENABLED:=0

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@ -0,0 +1,149 @@
// godefs -f -m64 defs.c
// MACHINE GENERATED - DO NOT EDIT.
// Constants
enum {
PROT_NONE = 0,
PROT_READ = 0x1,
PROT_WRITE = 0x2,
PROT_EXEC = 0x4,
MAP_ANON = 0x1000,
MAP_PRIVATE = 0x2,
MAP_FIXED = 0x10,
SA_SIGINFO = 0x40,
SA_RESTART = 0x2,
SA_ONSTACK = 0x1,
EINTR = 0x4,
SIGHUP = 0x1,
SIGINT = 0x2,
SIGQUIT = 0x3,
SIGILL = 0x4,
SIGTRAP = 0x5,
SIGABRT = 0x6,
SIGEMT = 0x7,
SIGFPE = 0x8,
SIGKILL = 0x9,
SIGBUS = 0xa,
SIGSEGV = 0xb,
SIGSYS = 0xc,
SIGPIPE = 0xd,
SIGALRM = 0xe,
SIGTERM = 0xf,
SIGURG = 0x10,
SIGSTOP = 0x11,
SIGTSTP = 0x12,
SIGCONT = 0x13,
SIGCHLD = 0x14,
SIGTTIN = 0x15,
SIGTTOU = 0x16,
SIGIO = 0x17,
SIGXCPU = 0x18,
SIGXFSZ = 0x19,
SIGVTALRM = 0x1a,
SIGPROF = 0x1b,
SIGWINCH = 0x1c,
SIGINFO = 0x1d,
SIGUSR1 = 0x1e,
SIGUSR2 = 0x1f,
FPE_INTDIV = 0x1,
FPE_INTOVF = 0x2,
FPE_FLTDIV = 0x3,
FPE_FLTOVF = 0x4,
FPE_FLTUND = 0x5,
FPE_FLTRES = 0x6,
FPE_FLTINV = 0x7,
FPE_FLTSUB = 0x8,
BUS_ADRALN = 0x1,
BUS_ADRERR = 0x2,
BUS_OBJERR = 0x3,
SEGV_MAPERR = 0x1,
SEGV_ACCERR = 0x2,
ITIMER_REAL = 0,
ITIMER_VIRTUAL = 0x1,
ITIMER_PROF = 0x2,
};
// Types
#pragma pack on
typedef struct Sigaltstack Sigaltstack;
struct Sigaltstack {
void *ss_sp;
uint64 ss_size;
int32 ss_flags;
byte pad_godefs_0[4];
};
typedef uint32 Sigset;
typedef struct Siginfo Siginfo;
struct Siginfo {
int32 si_signo;
int32 si_code;
int32 si_errno;
byte pad_godefs_0[4];
byte _data[120];
};
typedef union Sigval Sigval;
union Sigval {
int32 sival_int;
void *sival_ptr;
};
typedef struct StackT StackT;
struct StackT {
void *ss_sp;
uint64 ss_size;
int32 ss_flags;
byte pad_godefs_0[4];
};
typedef struct Timeval Timeval;
struct Timeval {
int64 tv_sec;
int64 tv_usec;
};
typedef struct Itimerval Itimerval;
struct Itimerval {
Timeval it_interval;
Timeval it_value;
};
typedef void sfxsave64;
typedef struct Sigcontext Sigcontext;
struct Sigcontext {
int64 sc_rdi;
int64 sc_rsi;
int64 sc_rdx;
int64 sc_rcx;
int64 sc_r8;
int64 sc_r9;
int64 sc_r10;
int64 sc_r11;
int64 sc_r12;
int64 sc_r13;
int64 sc_r14;
int64 sc_r15;
int64 sc_rbp;
int64 sc_rbx;
int64 sc_rax;
int64 sc_gs;
int64 sc_fs;
int64 sc_es;
int64 sc_ds;
int64 sc_trapno;
int64 sc_err;
int64 sc_rip;
int64 sc_cs;
int64 sc_rflags;
int64 sc_rsp;
int64 sc_ss;
sfxsave64 *sc_fpstate;
int32 sc_onstack;
int32 sc_mask;
};
#pragma pack off

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@ -0,0 +1,8 @@
// 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.
TEXT _rt0_amd64_openbsd(SB),7,$-8
MOVQ $_rt0_amd64(SB), DX
MOVQ SP, DI
JMP DX

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@ -0,0 +1,199 @@
// 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.
#include "runtime.h"
#include "defs.h"
#include "signals.h"
#include "os.h"
extern void runtime·sigtramp(void);
typedef struct sigaction {
union {
void (*__sa_handler)(int32);
void (*__sa_sigaction)(int32, Siginfo*, void *);
} __sigaction_u; /* signal handler */
uint32 sa_mask; /* signal mask to apply */
int32 sa_flags; /* see signal options below */
} Sigaction;
void
runtime·dumpregs(Sigcontext *r)
{
runtime·printf("rax %X\n", r->sc_rax);
runtime·printf("rbx %X\n", r->sc_rbx);
runtime·printf("rcx %X\n", r->sc_rcx);
runtime·printf("rdx %X\n", r->sc_rdx);
runtime·printf("rdi %X\n", r->sc_rdi);
runtime·printf("rsi %X\n", r->sc_rsi);
runtime·printf("rbp %X\n", r->sc_rbp);
runtime·printf("rsp %X\n", r->sc_rsp);
runtime·printf("r8 %X\n", r->sc_r8);
runtime·printf("r9 %X\n", r->sc_r9);
runtime·printf("r10 %X\n", r->sc_r10);
runtime·printf("r11 %X\n", r->sc_r11);
runtime·printf("r12 %X\n", r->sc_r12);
runtime·printf("r13 %X\n", r->sc_r13);
runtime·printf("r14 %X\n", r->sc_r14);
runtime·printf("r15 %X\n", r->sc_r15);
runtime·printf("rip %X\n", r->sc_rip);
runtime·printf("rflags %X\n", r->sc_rflags);
runtime·printf("cs %X\n", r->sc_cs);
runtime·printf("fs %X\n", r->sc_fs);
runtime·printf("gs %X\n", r->sc_gs);
}
String
runtime·signame(int32 sig)
{
if(sig < 0 || sig >= NSIG)
return runtime·emptystring;
return runtime·gostringnocopy((byte*)runtime·sigtab[sig].name);
}
void
runtime·sighandler(int32 sig, Siginfo *info, void *context, G *gp)
{
Sigcontext *r = context;
uintptr *sp;
if(sig == SIGPROF) {
runtime·sigprof((uint8*)r->sc_rip,
(uint8*)r->sc_rsp, nil, gp);
return;
}
if(gp != nil && (runtime·sigtab[sig].flags & SigPanic)) {
// Make it look like a call to the signal func.
// Have to pass arguments out of band since
// augmenting the stack frame would break
// the unwinding code.
gp->sig = sig;
gp->sigcode0 = info->si_code;
gp->sigcode1 = *(uintptr*)((byte*)info + 16); /* si_addr */
gp->sigpc = r->sc_rip;
// Only push runtime·sigpanic if r->mc_rip != 0.
// If r->mc_rip == 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(r->sc_rip != 0) {
sp = (uintptr*)r->sc_rsp;
*--sp = r->sc_rip;
r->sc_rsp = (uintptr)sp;
}
r->sc_rip = (uintptr)runtime·sigpanic;
return;
}
if(runtime·sigtab[sig].flags & SigQueue) {
if(runtime·sigsend(sig)
|| (runtime·sigtab[sig].flags & SigIgnore))
return;
runtime·exit(2); // SIGINT, SIGTERM, etc
}
if(runtime·panicking) // traceback already printed
runtime·exit(2);
runtime·panicking = 1;
if(sig < 0 || sig >= NSIG)
runtime·printf("Signal %d\n", sig);
else
runtime·printf("%s\n", runtime·sigtab[sig].name);
runtime·printf("PC=%X\n", r->sc_rip);
runtime·printf("\n");
if(runtime·gotraceback()){
runtime·traceback((void*)r->sc_rip, (void*)r->sc_rsp, 0, gp);
runtime·tracebackothers(gp);
runtime·dumpregs(r);
}
runtime·exit(2);
}
// Called from kernel on signal stack, so no stack split.
#pragma textflag 7
void
runtime·sigignore(void)
{
}
void
runtime·signalstack(byte *p, int32 n)
{
Sigaltstack st;
st.ss_sp = (int8*)p;
st.ss_size = n;
st.ss_flags = 0;
runtime·sigaltstack(&st, nil);
}
static void
sigaction(int32 i, void (*fn)(int32, Siginfo*, void*, G*), bool restart)
{
Sigaction sa;
runtime·memclr((byte*)&sa, sizeof sa);
sa.sa_flags = SA_SIGINFO|SA_ONSTACK;
if(restart)
sa.sa_flags |= SA_RESTART;
sa.sa_mask = ~0ULL;
if (fn == runtime·sighandler)
fn = (void*)runtime·sigtramp;
sa.__sigaction_u.__sa_sigaction = (void*)fn;
runtime·sigaction(i, &sa, nil);
}
void
runtime·initsig(int32 queue)
{
int32 i;
void *fn;
runtime·siginit();
for(i = 0; i<NSIG; i++) {
if(runtime·sigtab[i].flags) {
if((runtime·sigtab[i].flags & SigQueue) != queue)
continue;
if(runtime·sigtab[i].flags & (SigCatch | SigQueue))
fn = runtime·sighandler;
else
fn = runtime·sigignore;
sigaction(i, fn, (runtime·sigtab[i].flags & SigRestart) != 0);
}
}
}
void
runtime·resetcpuprofiler(int32 hz)
{
Itimerval it;
runtime·memclr((byte*)&it, sizeof it);
if(hz == 0) {
runtime·setitimer(ITIMER_PROF, &it, nil);
sigaction(SIGPROF, SIG_IGN, true);
} else {
sigaction(SIGPROF, runtime·sighandler, true);
it.it_interval.tv_sec = 0;
it.it_interval.tv_usec = 1000000 / hz;
it.it_value = it.it_interval;
runtime·setitimer(ITIMER_PROF, &it, nil);
}
m->profilehz = hz;
}
void
os·sigpipe(void)
{
sigaction(SIGPIPE, SIG_DFL, false);
runtime·raisesigpipe();
}

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@ -0,0 +1,221 @@
// 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.
//
// System calls and other sys.stuff for AMD64, OpenBSD
// /usr/src/sys/kern/syscalls.master for syscall numbers.
//
#include "amd64/asm.h"
// int64 rfork_thread(int32 flags, void *stack, M *m, G *g, void (*fn)(void));
TEXT runtime·rfork_thread(SB),7,$0
MOVL flags+8(SP), DI
MOVQ stack+16(SP), SI
// Copy m, g, fn off parent stack for use by child.
MOVQ mm+24(SP), R8
MOVQ gg+32(SP), R9
MOVQ fn+40(SP), R12
MOVL $251, AX // sys_rfork
SYSCALL
// Return if rfork syscall failed
JCC 3(PC)
NEGL AX
RET
// In parent, return.
CMPL AX, $0
JEQ 2(PC)
RET
// In child, on new stack.
MOVQ SI, SP
// Initialize m->procid to thread ID
MOVL $299, AX // sys_getthrid
SYSCALL
MOVQ AX, m_procid(R8)
// Set FS to point at m->tls.
LEAQ m_tls(R8), DI
CALL runtime·settls(SB)
// In child, set up new stack
get_tls(CX)
MOVQ R8, m(CX)
MOVQ R9, g(CX)
CALL runtime·stackcheck(SB)
// Call fn
CALL R12
// It shouldn't return. If it does, exit
MOVL $302, AX // sys_threxit
SYSCALL
JMP -3(PC) // keep exiting
TEXT runtime·sys_sched_yield(SB),7,$0
MOVL $298, AX
SYSCALL
RET
TEXT runtime·sys_thrsleep(SB),7,$0
MOVQ 8(SP), DI
MOVL 16(SP), SI
MOVQ 24(SP), DX
MOVQ 32(SP), R10
MOVL $300, AX
SYSCALL
RET
TEXT runtime·sys_thrwakeup(SB),7,$0
MOVQ 8(SP), DI
MOVL 16(SP), SI
MOVL $301, AX
SYSCALL
RET
// Exit the entire program (like C exit)
TEXT runtime·exit(SB),7,$-8
MOVL 8(SP), DI // arg 1 - exit status
MOVL $1, AX // sys_exit
SYSCALL
CALL runtime·notok(SB)
RET
TEXT runtime·exit1(SB),7,$-8
MOVL $302, AX // sys_threxit
SYSCALL
CALL runtime·notok(SB)
RET
TEXT runtime·write(SB),7,$-8
MOVL 8(SP), DI // arg 1 - fd
MOVQ 16(SP), SI // arg 2 - buf
MOVL 24(SP), DX // arg 3 - nbyte
MOVL $4, AX // sys_write
SYSCALL
RET
TEXT runtime·raisesigpipe(SB),7,$16
MOVL $299, AX // sys_getthrid
SYSCALL
MOVQ AX, DI // arg 1 - pid
MOVQ $13, SI // arg 2 - signum == SIGPIPE
MOVL $37, AX // sys_kill
SYSCALL
RET
TEXT runtime·setitimer(SB),7,$-8
MOVL 8(SP), DI // arg 1 - which
MOVQ 16(SP), SI // arg 2 - itv
MOVQ 24(SP), DX // arg 3 - oitv
MOVL $83, AX // sys_setitimer
SYSCALL
RET
TEXT runtime·gettime(SB),7,$32
LEAQ 8(SP), DI // arg 1 - tp
MOVQ $0, SI // arg 2 - tzp
MOVL $116, AX // sys_gettimeofday
SYSCALL
MOVQ 8(SP), BX // sec
MOVQ sec+0(FP), DI
MOVQ BX, (DI)
MOVL 16(SP), BX // usec
MOVQ usec+8(FP), DI
MOVL BX, (DI)
RET
TEXT runtime·sigaction(SB),7,$-8
MOVL 8(SP), DI // arg 1 - signum
MOVQ 16(SP), SI // arg 2 - nsa
MOVQ 24(SP), DX // arg 3 - osa
MOVL $46, AX
SYSCALL
JCC 2(PC)
CALL runtime·notok(SB)
RET
TEXT runtime·sigtramp(SB),7,$64
get_tls(BX)
// save g
MOVQ g(BX), R10
MOVQ R10, 40(SP)
// g = m->signal
MOVQ m(BX), BP
MOVQ m_gsignal(BP), BP
MOVQ BP, g(BX)
MOVQ DI, 0(SP)
MOVQ SI, 8(SP)
MOVQ DX, 16(SP)
MOVQ R10, 24(SP)
CALL runtime·sighandler(SB)
// restore g
get_tls(BX)
MOVQ 40(SP), R10
MOVQ R10, g(BX)
RET
TEXT runtime·mmap(SB),7,$0
MOVQ 8(SP), DI // arg 1 - addr
MOVQ 16(SP), SI // arg 2 - len
MOVL 24(SP), DX // arg 3 - prot
MOVL 28(SP), R10 // arg 4 - flags
MOVL 32(SP), R8 // arg 5 - fd
MOVQ 36(SP), R9
SUBQ $16, SP
MOVQ R9, 8(SP) // arg 7 - offset (passed on stack)
MOVQ $0, R9 // arg 6 - pad
MOVL $197, AX
SYSCALL
JCC 2(PC)
NEGL AX
ADDQ $16, SP
RET
TEXT runtime·munmap(SB),7,$0
MOVQ 8(SP), DI // arg 1 - addr
MOVQ 16(SP), SI // arg 2 - len
MOVL $73, AX // sys_munmap
SYSCALL
JCC 2(PC)
CALL runtime·notok(SB)
RET
TEXT runtime·notok(SB),7,$-8
MOVL $0xf1, BP
MOVQ BP, (BP)
RET
TEXT runtime·sigaltstack(SB),7,$-8
MOVQ new+8(SP), DI // arg 1 - nss
MOVQ old+16(SP), SI // arg 2 - oss
MOVQ $288, AX // sys_sigaltstack
SYSCALL
JCC 2(PC)
CALL runtime·notok(SB)
RET
// set tls base to DI
TEXT runtime·settls(SB),7,$8
// adjust for ELF: wants to use -16(FS) and -8(FS) for g and m
ADDQ $16, DI
MOVQ DI, 0(SP)
MOVQ SP, SI
MOVQ $12, DI // AMD64_SET_FSBASE (machine/sysarch.h)
MOVQ $165, AX // sys_sysarch
SYSCALL
JCC 2(PC)
CALL runtime·notok(SB)
RET

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@ -0,0 +1,103 @@
// 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 -m32 defs.c >386/defs.h
*/
#include <sys/types.h>
#include <sys/mman.h>
#include <sys/time.h>
#include <sys/unistd.h>
#include <sys/signal.h>
#include <machine/mcontext.h>
#include <errno.h>
#include <signal.h>
enum {
$PROT_NONE = PROT_NONE,
$PROT_READ = PROT_READ,
$PROT_WRITE = PROT_WRITE,
$PROT_EXEC = PROT_EXEC,
$MAP_ANON = MAP_ANON,
$MAP_PRIVATE = MAP_PRIVATE,
$MAP_FIXED = MAP_FIXED,
$SA_SIGINFO = SA_SIGINFO,
$SA_RESTART = SA_RESTART,
$SA_ONSTACK = SA_ONSTACK,
$EINTR = EINTR,
$SIGHUP = SIGHUP,
$SIGINT = SIGINT,
$SIGQUIT = SIGQUIT,
$SIGILL = SIGILL,
$SIGTRAP = SIGTRAP,
$SIGABRT = SIGABRT,
$SIGEMT = SIGEMT,
$SIGFPE = SIGFPE,
$SIGKILL = SIGKILL,
$SIGBUS = SIGBUS,
$SIGSEGV = SIGSEGV,
$SIGSYS = SIGSYS,
$SIGPIPE = SIGPIPE,
$SIGALRM = SIGALRM,
$SIGTERM = SIGTERM,
$SIGURG = SIGURG,
$SIGSTOP = SIGSTOP,
$SIGTSTP = SIGTSTP,
$SIGCONT = SIGCONT,
$SIGCHLD = SIGCHLD,
$SIGTTIN = SIGTTIN,
$SIGTTOU = SIGTTOU,
$SIGIO = SIGIO,
$SIGXCPU = SIGXCPU,
$SIGXFSZ = SIGXFSZ,
$SIGVTALRM = SIGVTALRM,
$SIGPROF = SIGPROF,
$SIGWINCH = SIGWINCH,
$SIGINFO = SIGINFO,
$SIGUSR1 = SIGUSR1,
$SIGUSR2 = SIGUSR2,
$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,
};
typedef struct sigaltstack $Sigaltstack;
typedef sigset_t $Sigset;
typedef siginfo_t $Siginfo;
typedef union sigval $Sigval;
typedef stack_t $StackT;
typedef struct timeval $Timeval;
typedef struct itimerval $Itimerval;
// This is a hack to avoid pulling in machine/fpu.h and struct fxsave64.
typedef void $sfxsave64;
typedef struct sigcontext $Sigcontext;

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#include "runtime.h"
#include "defs.h"
#include "os.h"
#include "malloc.h"
void*
runtime·SysAlloc(uintptr n)
{
void *v;
mstats.sys += n;
v = runtime·mmap(nil, n, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_ANON|MAP_PRIVATE, -1, 0);
if(v < (void*)4096)
return nil;
return v;
}
void
runtime·SysUnused(void *v, uintptr n)
{
USED(v);
USED(n);
// TODO(rsc): call madvise MADV_DONTNEED
}
void
runtime·SysFree(void *v, uintptr n)
{
mstats.sys -= n;
runtime·munmap(v, n);
}
void*
runtime·SysReserve(void *v, uintptr n)
{
// On 64-bit, people with ulimit -v set complain if we reserve too
// much address space. Instead, assume that the reservation is okay
// and check the assumption in SysMap.
if(sizeof(void*) == 8)
return v;
return runtime·mmap(v, n, PROT_NONE, MAP_ANON|MAP_PRIVATE, -1, 0);
}
enum
{
ENOMEM = 12,
};
void
runtime·SysMap(void *v, uintptr n)
{
void *p;
mstats.sys += n;
// On 64-bit, we don't actually have v reserved, so tread carefully.
if(sizeof(void*) == 8) {
p = runtime·mmap(v, n, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_ANON|MAP_PRIVATE, -1, 0);
if(p == (void*)-ENOMEM)
runtime·throw("runtime: out of memory");
if(p != v) {
runtime·printf("runtime: address space conflict: map(%p) = %p\n", v, p);
runtime·throw("runtime: address space conflict");
}
return;
}
p = runtime·mmap(v, n, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_ANON|MAP_FIXED|MAP_PRIVATE, -1, 0);
if(p == (void*)-ENOMEM)
runtime·throw("runtime: out of memory");
if(p != v)
runtime·throw("runtime: cannot map pages in arena address space");
}

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#define SIG_DFL ((void*)0)
#define SIG_IGN ((void*)1)
struct sigaction;
void runtime·sigpanic(void);
void runtime·sigaltstack(Sigaltstack*, Sigaltstack*);
void runtime·sigaction(int32, struct sigaction*, struct sigaction*);
void runtime·setitimerval(int32, Itimerval*, Itimerval*);
void runtime·setitimer(int32, Itimerval*, Itimerval*);
void runtime·raisesigpipe(void);

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@ -0,0 +1,52 @@
// 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.
#define C SigCatch
#define I SigIgnore
#define R SigRestart
#define Q SigQueue
#define P SigPanic
SigTab runtime·sigtab[] = {
/* 0 */ 0, "SIGNONE: no trap",
/* 1 */ Q+R, "SIGHUP: terminal line hangup",
/* 2 */ Q+R, "SIGINT: interrupt",
/* 3 */ C, "SIGQUIT: quit",
/* 4 */ C, "SIGILL: illegal instruction",
/* 5 */ C, "SIGTRAP: trace trap",
/* 6 */ C, "SIGABRT: abort",
/* 7 */ C, "SIGEMT: EMT instruction",
/* 8 */ C+P, "SIGFPE: floating-point exception",
/* 9 */ 0, "SIGKILL: kill",
/* 10 */ C+P, "SIGBUS: bus error",
/* 11 */ C+P, "SIGSEGV: segmentation violation",
/* 12 */ C, "SIGSYS: bad system call",
/* 13 */ I, "SIGPIPE: write to broken pipe",
/* 14 */ Q+I+R, "SIGALRM: alarm clock",
/* 15 */ Q+R, "SIGTERM: termination",
/* 16 */ Q+I+R, "SIGURG: urgent condition on socket",
/* 17 */ 0, "SIGSTOP: stop, unblockable",
/* 18 */ Q+I+R, "SIGTSTP: stop from tty",
/* 19 */ 0, "SIGCONT: continue",
/* 20 */ Q+I+R, "SIGCHLD: child status has changed",
/* 21 */ Q+I+R, "SIGTTIN: background read from tty",
/* 22 */ Q+I+R, "SIGTTOU: background write to tty",
/* 23 */ Q+I+R, "SIGIO: i/o now possible",
/* 24 */ Q+I+R, "SIGXCPU: cpu limit exceeded",
/* 25 */ Q+I+R, "SIGXFSZ: file size limit exceeded",
/* 26 */ Q+I+R, "SIGVTALRM: virtual alarm clock",
/* 27 */ Q+I+R, "SIGPROF: profiling alarm clock",
/* 28 */ Q+I+R, "SIGWINCH: window size change",
/* 29 */ Q+I+R, "SIGINFO: information request",
/* 30 */ Q+I+R, "SIGUSR1: user-defined signal 1",
/* 31 */ Q+I+R, "SIGUSR2: user-defined signal 2",
/* 32 */ Q+I+R, "SIGTHR: reserved",
};
#undef C
#undef I
#undef R
#undef Q
#undef P
#define NSIG 33

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@ -0,0 +1,156 @@
// Use of this source file is governed by a BSD-style
// license that can be found in the LICENSE file.`
#include "runtime.h"
#include "defs.h"
#include "os.h"
#include "stack.h"
extern SigTab runtime·sigtab[];
extern int64 runtime·rfork_thread(int32 flags, void *stack, M *m, G *g, void (*fn)(void));
extern void runtime·sys_sched_yield(void);
// Basic spinlocks using CAS. We can improve on these later.
static void
lock(Lock *l)
{
uint32 v;
int32 ret;
for(;;) {
if(runtime·cas(&l->key, 0, 1))
return;
runtime·sys_sched_yield();
}
}
static void
unlock(Lock *l)
{
uint32 v;
int32 ret;
for (;;) {
v = l->key;
if((v&1) == 0)
runtime·throw("unlock of unlocked lock");
if(runtime·cas(&l->key, v, 0))
break;
}
}
void
runtime·lock(Lock *l)
{
if(m->locks < 0)
runtime·throw("lock count");
m->locks++;
lock(l);
}
void
runtime·unlock(Lock *l)
{
m->locks--;
if(m->locks < 0)
runtime·throw("lock count");
unlock(l);
}
// Event notifications.
void
runtime·noteclear(Note *n)
{
n->lock.key = 0;
lock(&n->lock);
}
void
runtime·notesleep(Note *n)
{
lock(&n->lock);
unlock(&n->lock);
}
void
runtime·notewakeup(Note *n)
{
unlock(&n->lock);
}
// From OpenBSD's sys/param.h
#define RFPROC (1<<4) /* change child (else changes curproc) */
#define RFMEM (1<<5) /* share `address space' */
#define RFNOWAIT (1<<6) /* parent need not wait() on child */
#define RFTHREAD (1<<13) /* create a thread, not a process */
void
runtime·newosproc(M *m, G *g, void *stk, void (*fn)(void))
{
int32 flags;
int32 ret;
flags = RFPROC | RFTHREAD | RFMEM | RFNOWAIT;
if (0) {
runtime·printf(
"newosproc stk=%p m=%p g=%p fn=%p id=%d/%d ostk=%p\n",
stk, m, g, fn, m->id, m->tls[0], &m);
}
m->tls[0] = m->id; // so 386 asm can find it
if((ret = runtime·rfork_thread(flags, stk, m, g, fn)) < 0) {
runtime·printf("runtime: failed to create new OS thread (have %d already; errno=%d)\n", runtime·mcount() - 1, -ret);
runtime·printf("runtime: is kern.rthreads disabled?\n");
runtime·throw("runtime.newosproc");
}
}
void
runtime·osinit(void)
{
}
void
runtime·goenvs(void)
{
runtime·goenvs_unix();
}
// Called to initialize a new m (including the bootstrap m).
void
runtime·minit(void)
{
// Initialize signal handling
m->gsignal = runtime·malg(32*1024);
runtime·signalstack(m->gsignal->stackguard - StackGuard, 32*1024);
}
void
runtime·sigpanic(void)
{
switch(g->sig) {
case SIGBUS:
if(g->sigcode0 == BUS_ADRERR && g->sigcode1 < 0x1000)
runtime·panicstring("invalid memory address or nil pointer dereference");
runtime·printf("unexpected fault address %p\n", g->sigcode1);
runtime·throw("fault");
case SIGSEGV:
if((g->sigcode0 == 0 || g->sigcode0 == SEGV_MAPERR || g->sigcode0 == SEGV_ACCERR) && g->sigcode1 < 0x1000)
runtime·panicstring("invalid memory address or nil pointer dereference");
runtime·printf("unexpected fault address %p\n", g->sigcode1);
runtime·throw("fault");
case SIGFPE:
switch(g->sigcode0) {
case FPE_INTDIV:
runtime·panicstring("integer divide by zero");
case FPE_INTOVF:
runtime·panicstring("integer overflow");
}
runtime·panicstring("floating point error");
}
runtime·panicstring(runtime·sigtab[g->sig].name);
}