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runtime: NetBSD/ARM support 

R=rsc, dave
CC=golang-dev
https://golang.org/cl/7289044
This commit is contained in:
Shenghou Ma 2013-02-13 01:00:04 +08:00
parent f38da96755
commit 37aba1aa77
7 changed files with 650 additions and 5 deletions
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9
src/pkg/runtime/asm_arm.s
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@ -72,8 +72,15 @@ TEXT runtime·breakpoint(SB),7,$0
WORD $0xe1200071 // BKPT 0x0001
RET
GLOBL runtime·goarm(SB), $4
TEXT runtime·asminit(SB),7,$0
// No per-thread init.
// disable runfast (flush-to-zero) mode of vfp if runtime.goarm > 5
MOVW runtime·goarm(SB), R11
CMP $5, R11
BLE 4(PC)
WORD $0xeef1ba10 // vmrs r11, fpscr
BIC $(1<<24), R11
WORD $0xeee1ba10 // vmsr fpscr, r11
RET
/*

140
src/pkg/runtime/defs_netbsd_arm.h Normal file
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@ -0,0 +1,140 @@
// Created by cgo -cdefs - DO NOT EDIT
// cgo -cdefs defs_netbsd.go
enum {
PROT_NONE = 0x0,
PROT_READ = 0x1,
PROT_WRITE = 0x2,
PROT_EXEC = 0x4,
MAP_ANON = 0x1000,
MAP_PRIVATE = 0x2,
MAP_FIXED = 0x10,
MADV_FREE = 0x6,
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 = 0x0,
ITIMER_VIRTUAL = 0x1,
ITIMER_PROF = 0x2,
};
typedef struct Sigaltstack Sigaltstack;
typedef struct Sigset Sigset;
typedef struct Siginfo Siginfo;
typedef struct StackT StackT;
typedef struct Timespec Timespec;
typedef struct Timeval Timeval;
typedef struct Itimerval Itimerval;
typedef struct McontextT McontextT;
typedef struct UcontextT UcontextT;
#pragma pack on
struct Sigaltstack {
byte *ss_sp;
uint32 ss_size;
int32 ss_flags;
};
struct Sigset {
uint32 __bits[4];
};
struct Siginfo {
int32 _signo;
int32 _code;
int32 _errno;
byte _reason[20];
};
struct StackT {
byte *ss_sp;
uint32 ss_size;
int32 ss_flags;
};
struct Timespec {
int64 tv_sec;
int32 tv_nsec;
};
struct Timeval {
int64 tv_sec;
int32 tv_usec;
};
struct Itimerval {
Timeval it_interval;
Timeval it_value;
};
struct McontextT {
uint32 __gregs[17];
#ifdef __ARM_EABI__
byte __fpu[4+8*32+4];
#else
byte __fpu[4+4*33+4];
#endif
uint32 _mc_tlsbase;
};
struct UcontextT {
uint32 uc_flags;
UcontextT *uc_link;
Sigset uc_sigmask;
StackT uc_stack;
McontextT uc_mcontext;
int32 __uc_pad[2];
};
#pragma pack off

4
src/pkg/runtime/os_netbsd.h
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@ -24,3 +24,7 @@ int32 runtime·sysctl(uint32*, uint32, byte*, uintptr*, byte*, uintptr);
#define NSIG 33
#define SI_USER 0
// From NetBSD's <sys/ucontext.h>
#define _UC_SIGMASK 0x01
#define _UC_CPU 0x04

8
src/pkg/runtime/rt0_netbsd_arm.s Normal file
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@ -0,0 +1,8 @@
// Copyright 2013 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.
// FreeBSD/NetBSD and Linux use the same linkage to main
TEXT _rt0_arm_netbsd(SB),7,$-4
B _rt0_arm(SB)

197
src/pkg/runtime/signal_netbsd_arm.c Normal file
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@ -0,0 +1,197 @@
// Copyright 2013 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 "signals_GOOS.h"
#include "os_GOOS.h"
#define r0 __gregs[0]
#define r1 __gregs[1]
#define r2 __gregs[2]
#define r3 __gregs[3]
#define r4 __gregs[4]
#define r5 __gregs[5]
#define r6 __gregs[6]
#define r7 __gregs[7]
#define r8 __gregs[8]
#define r9 __gregs[9]
#define r10 __gregs[10]
#define r11 __gregs[11]
#define r12 __gregs[12]
#define r13 __gregs[13]
#define r14 __gregs[14]
#define r15 __gregs[15]
#define cpsr __gregs[16]
void
runtime·dumpregs(McontextT *r)
{
runtime·printf("r0 %x\n", r->r0);
runtime·printf("r1 %x\n", r->r1);
runtime·printf("r2 %x\n", r->r2);
runtime·printf("r3 %x\n", r->r3);
runtime·printf("r4 %x\n", r->r4);
runtime·printf("r5 %x\n", r->r5);
runtime·printf("r6 %x\n", r->r6);
runtime·printf("r7 %x\n", r->r7);
runtime·printf("r8 %x\n", r->r8);
runtime·printf("r9 %x\n", r->r9);
runtime·printf("r10 %x\n", r->r10);
runtime·printf("fp %x\n", r->r11);
runtime·printf("ip %x\n", r->r12);
runtime·printf("sp %x\n", r->r13);
runtime·printf("lr %x\n", r->r14);
runtime·printf("pc %x\n", r->r15);
runtime·printf("cpsr %x\n", r->cpsr);
}
extern void runtime·lwp_tramp(void);
extern void runtime·sigtramp(void);
typedef struct sigaction {
union {
void (*_sa_handler)(int32);
void (*_sa_sigaction)(int32, Siginfo*, void *);
} _sa_u; /* signal handler */
uint32 sa_mask[4]; /* signal mask to apply */
int32 sa_flags; /* see signal options below */
} Sigaction;
void
runtime·sighandler(int32 sig, Siginfo *info, void *context, G *gp)
{
UcontextT *uc;
McontextT *r;
SigTab *t;
uc = context;
r = &uc->uc_mcontext;
if(sig == SIGPROF) {
runtime·sigprof((uint8*)r->r15, (uint8*)r->r13, (uint8*)r->r14, gp);
return;
}
t = &runtime·sigtab[sig];
if(info->_code != SI_USER && (t->flags & SigPanic)) {
if(gp == nil || gp == m->g0)
goto Throw;
// Make it look like a call to the signal func.
// We have to pass arguments out of band since
// augmenting the stack frame would break
// the unwinding code.
gp->sig = sig;
gp->sigcode0 = info->_code;
gp->sigcode1 = *(uintptr*)&info->_reason[0]; /* _addr */
gp->sigpc = r->r15;
// We arrange lr, and pc to pretend the panicking
// function calls sigpanic directly.
// Always save LR to stack so that panics in leaf
// functions are correctly handled. This smashes
// the stack frame but we're not going back there
// anyway.
r->r13 -= 4;
*(uint32 *)r->r13 = r->r14;
// Don't bother saving PC if it's zero, which is
// probably a call to a nil func: the old link register
// is more useful in the stack trace.
if(r->r15 != 0)
r->r14 = r->r15;
// In case we are panicking from external C code
r->r10 = (uintptr)gp;
r->r9 = (uintptr)m;
r->r15 = (uintptr)runtime·sigpanic;
return;
}
if(info->_code == SI_USER || (t->flags & SigNotify))
if(runtime·sigsend(sig))
return;
if(t->flags & SigKill)
runtime·exit(2);
if(!(t->flags & SigThrow))
return;
Throw:
runtime·startpanic();
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->r15);
if(m->lockedg != nil && m->ncgo > 0 && gp == m->g0) {
runtime·printf("signal arrived during cgo execution\n");
gp = m->lockedg;
}
runtime·printf("\n");
if(runtime·gotraceback()){
runtime·traceback((void*)r->r15, (void*)r->r13, (void*)r->r14, gp);
runtime·tracebackothers(gp);
runtime·printf("\n");
runtime·dumpregs(r);
}
// breakpoint();
runtime·exit(2);
}
void
runtime·signalstack(byte *p, int32 n)
{
Sigaltstack st;
st.ss_sp = (uint8*)p;
st.ss_size = n;
st.ss_flags = 0;
runtime·sigaltstack(&st, nil);
}
void
runtime·setsig(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[0] = ~0U;
sa.sa_mask[1] = ~0U;
sa.sa_mask[2] = ~0U;
sa.sa_mask[3] = ~0U;
if (fn == runtime·sighandler)
fn = (void*)runtime·sigtramp;
sa._sa_u._sa_sigaction = (void*)fn;
runtime·sigaction(i, &sa, nil);
}
void
runtime·lwp_mcontext_init(McontextT *mc, void *stack, M *mp, G *gp, void (*fn)(void))
{
mc->r15 = (uint32)runtime·lwp_tramp;
mc->r13 = (uint32)stack;
mc->r0 = (uint32)mp;
mc->r1 = (uint32)gp;
mc->r2 = (uint32)fn;
}
void
runtime·checkgoarm(void)
{
// TODO(minux)
}
#pragma textflag 7
int64
runtime·cputicks() {
// Currently cputicks() is used in blocking profiler and to seed runtime·fastrand1().
// runtime·nanotime() is a poor approximation of CPU ticks that is enough for the profiler.
// TODO: need more entropy to better seed fastrand1.
return runtime·nanotime();
}

293
src/pkg/runtime/sys_netbsd_arm.s Normal file
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@ -0,0 +1,293 @@
// Copyright 2013 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 ARM, NetBSD
// /usr/src/sys/kern/syscalls.master for syscall numbers.
//
#include "zasm_GOOS_GOARCH.h"
// Exit the entire program (like C exit)
TEXT runtime·exit(SB),7,$-4
MOVW 0(FP), R0 // arg 1 exit status
SWI $0xa00001
MOVW.CS $0, R9 // crash on syscall failure
MOVW.CS R9, (R9)
RET
TEXT runtime·exit1(SB),7,$-4
SWI $0xa00136 // sys__lwp_exit
MOVW $1, R9 // crash
MOVW R9, (R9)
RET
TEXT runtime·write(SB),7,$-4
MOVW 0(FP), R0 // arg 1 - fd
MOVW 4(FP), R1 // arg 2 - buf
MOVW 8(FP), R2 // arg 3 - nbyte
SWI $0xa00004 // sys_write
RET
// int32 lwp_create(void *context, uintptr flags, void *lwpid)
TEXT runtime·lwp_create(SB),7,$0
MOVW context+0(FP), R0
MOVW flags+4(FP), R1
MOVW lwpid+8(FP), R2
SWI $0xa00135 // sys__lwp_create
RET
TEXT runtime·osyield(SB),7,$0
SWI $0xa0015e // sys_sched_yield
RET
TEXT runtime·lwp_park(SB),7,$0
MOVW 0(FP), R0 // arg 1 - abstime
MOVW 4(FP), R1 // arg 2 - unpark
MOVW 8(FP), R2 // arg 3 - hint
MOVW 12(FP), R3 // arg 4 - unparkhint
SWI $0xa001b2 // sys__lwp_park
RET
TEXT runtime·lwp_unpark(SB),7,$0
MOVW 0(FP), R0 // arg 1 - lwp
MOVW 4(FP), R1 // arg 2 - hint
SWI $0xa00141 // sys__lwp_unpark
RET
TEXT runtime·lwp_self(SB),7,$0
SWI $0xa00137 // sys__lwp_self
RET
TEXT runtime·lwp_tramp(SB),7,$0
MOVW R0, R9 // m
MOVW R1, R10 // g
BL runtime·emptyfunc(SB) // fault if stack check is wrong
BL (R2)
MOVW $2, R9 // crash (not reached)
MOVW R9, (R9)
RET
TEXT runtime·usleep(SB),7,$16
MOVW usec+0(FP), R0
MOVW R0, R2
MOVW $1000000, R1
DIV R1, R0
// 0(R13) is the saved LR, don't use it
MOVW R0, 4(R13) // tv_sec.low
MOVW $0, R0
MOVW R0, 8(R13) // tv_sec.high
MOD R1, R2
MOVW $1000, R1
MUL R1, R2
MOVW R2, 12(R13) // tv_nsec
MOVW $4(R13), R0 // arg 1 - rqtp
MOVW $0, R1 // arg 2 - rmtp
SWI $0xa001ae // sys_nanosleep
RET
TEXT runtime·raisesigpipe(SB),7,$16
SWI $0xa00137 // sys__lwp_self, the returned R0 is arg 1
MOVW $13, R1 // arg 2 - signo == SIGPIPE
SWI $0xa0013e // sys__lwp_kill
RET
TEXT runtime·setitimer(SB),7,$-4
MOVW 0(FP), R0 // arg 1 - which
MOVW 4(FP), R1 // arg 2 - itv
MOVW 8(FP), R2 // arg 3 - oitv
SWI $0xa001a9 // sys_setitimer
RET
// func now() (sec int64, nsec int32)
TEXT time·now(SB), 7, $32
MOVW $0, R0 // CLOCK_REALTIME
MOVW $8(R13), R1
SWI $0xa001ab // clock_gettime
MOVW 8(R13), R0 // sec.low
MOVW 12(R13), R1 // sec.high
MOVW 16(R13), R2 // nsec
MOVW R0, 0(FP)
MOVW R1, 4(FP)
MOVW R2, 8(FP)
RET
// int64 nanotime(void) so really
// void nanotime(int64 *nsec)
TEXT runtime·nanotime(SB), 7, $32
MOVW $0, R0 // CLOCK_REALTIME
MOVW $8(R13), R1
SWI $0xa001ab // clock_gettime
MOVW 8(R13), R0 // sec.low
MOVW 12(R13), R4 // sec.high
MOVW 16(R13), R2 // nsec
MOVW $1000000000, R3
MULLU R0, R3, (R1, R0)
MUL R3, R4
ADD.S R2, R0
ADC R4, R1
MOVW 0(FP), R3
MOVW R0, 0(R3)
MOVW R1, 4(R3)
RET
TEXT runtime·getcontext(SB),7,$-4
MOVW 0(FP), R0 // arg 1 - context
SWI $0xa00133 // sys_getcontext
MOVW.CS $0, R9 // crash on syscall failure
MOVW.CS R9, (R9)
RET
TEXT runtime·sigprocmask(SB),7,$0
MOVW 0(FP), R0 // arg 1 - how
MOVW 4(FP), R1 // arg 2 - set
MOVW 8(FP), R2 // arg 3 - oset
SWI $0xa00125 // sys_sigprocmask
MOVW.CS $0, R9 // crash on syscall failure
MOVW.CS R9, (R9)
RET
TEXT runtime·sigreturn_tramp(SB),7,$-4
// in runtime·sigtramp, we saved ucontext into m->tls[0],
// here we just load it and call sys_setcontext
MOVW m_tls(m), R0
SWI $0xa00134 // sys_setcontext
// something failed, we have to exit
MOVW $0x4242, R0 // magic return number
SWI $0xa00001 // sys_exit
B -2(PC) // continue exit
TEXT runtime·sigaction(SB),7,$4
MOVW 0(FP), R0 // arg 1 - signum
MOVW 4(FP), R1 // arg 2 - nsa
MOVW 8(FP), R2 // arg 3 - osa
MOVW $runtime·sigreturn_tramp(SB), R3 // arg 4 - tramp
MOVW $2, R4 // arg 5 - vers
MOVW R4, 4(R13)
ADD $4, R13 // pass arg 5 on stack
SWI $0xa00154 // sys___sigaction_sigtramp
SUB $4, R13
MOVW.CS $3, R9 // crash on syscall failure
MOVW.CS R9, (R9)
RET
TEXT runtime·sigtramp(SB),7,$24
// this might be called in external code context,
// where g and m are not set.
// first save R0, because cgo_load_gm will clobber it
// TODO(adonovan): call runtime·badsignal if m=0, like other platforms?
MOVW R0, 4(R13) // signum
MOVW cgo_load_gm(SB), R0
CMP $0, R0
BL.NE (R0)
// save g
MOVW R10, R4
MOVW R10, 20(R13)
// g = m->signal
MOVW m_gsignal(R9), R10
// R0 is already saved
MOVW R1, 8(R13) // info
MOVW R2, 12(R13) // context
MOVW R4, 16(R13) // gp
// we also save the ucontext into m->tls[0] for easy
// signal return
MOVW R2, m_tls(m)
BL runtime·sighandler(SB)
// restore g
MOVW 20(R13), R10
RET
TEXT runtime·mmap(SB),7,$12
MOVW 0(FP), R0 // arg 1 - addr
MOVW 4(FP), R1 // arg 2 - len
MOVW 8(FP), R2 // arg 3 - prot
MOVW 12(FP), R3 // arg 4 - flags
// arg 5 (fid) and arg6 (offset_lo, offset_hi) are passed on stack
// note the C runtime only passes the 32-bit offset_lo to us
MOVW 16(FP), R4 // arg 5
MOVW R4, 4(R13)
MOVW 20(FP), R5 // arg 6 lower 32-bit
MOVW R5, 8(R13)
MOVW $0, R6 // higher 32-bit for arg 6
MOVW R6, 12(R13)
ADD $4, R13 // pass arg 5 and arg 6 on stack
SWI $0xa000c5 // sys_mmap
SUB $4, R13
RET
TEXT runtime·munmap(SB),7,$0
MOVW 0(FP), R0 // arg 1 - addr
MOVW 4(FP), R1 // arg 2 - len
SWI $0xa00049 // sys_munmap
MOVW.CS $0, R9 // crash on syscall failure
MOVW.CS R9, (R9)
RET
TEXT runtime·madvise(SB),7,$0
MOVW 0(FP), R0 // arg 1 - addr
MOVW 4(FP), R1 // arg 2 - len
MOVW 8(FP), R2 // arg 3 - behav
SWI $0xa0004b // sys_madvise
// ignore failure - maybe pages are locked
RET
TEXT runtime·sigaltstack(SB),7,$-4
MOVW 0(FP), R0 // arg 1 - nss
MOVW 4(FP), R1 // arg 2 - oss
SWI $0xa00119 // sys___sigaltstack14
MOVW.CS $0, R9 // crash on syscall failure
MOVW.CS R9, (R9)
RET
TEXT runtime·sysctl(SB),7,$8
MOVW 0(FP), R0 // arg 1 - name
MOVW 4(FP), R1 // arg 2 - namelen
MOVW 8(FP), R2 // arg 3 - oldp
MOVW 12(FP), R3 // arg 4 - oldlenp
MOVW 16(FP), R4 // arg 5 - newp
MOVW R4, 4(R13)
MOVW 20(FP), R4 // arg 6 - newlen
MOVW R4, 8(R13)
ADD $4, R13 // pass arg 5 and 6 on stack
SWI $0xa000ca // sys___sysctl
SUB $4, R13
RET
TEXT runtime·cacheflush(SB),7,$8
MOVW $1, R0 // drain_writebuf
SWI $0xa000a5 // sysarch
MOVW $0, R0 // icacheflush
MOVW 0(FP), R1 // start
MOVW R1, 4(R13)
MOVW 4(FP), R2 // end
SUB R1, R2 // R2 = length
MOVW R2, 8(R13)
MOVW $4(R13), R1
SWI $0xa000a5 // sysarch
RET
TEXT runtime·casp(SB),7,$0
B runtime·cas(SB)
// TODO(minux): this is only valid for ARMv6+
// bool armcas(int32 *val, int32 old, int32 new)
// Atomically:
// if(*val == old){
// *val = new;
// return 1;
// }else
// return 0;
TEXT runtime·cas(SB),7,$0
B runtime·armcas(SB)

4
src/pkg/runtime/thread_netbsd.c
View File

@ -144,10 +144,6 @@ runtime·semawakeup(M *mp)
runtime·atomicstore(&mp->waitsemalock, 0);
}
// From NetBSD's <sys/ucontext.h>
#define _UC_SIGMASK 0x01
#define _UC_CPU 0x04
void
runtime·newosproc(M *mp, G *gp, void *stk, void (*fn)(void))
{