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runtime: implement getcontext and sigprocmask for netbsd 

Implement getcontext and sigprocmask for NetBSD - these will soon be
used by the thread handling code.

Also fix netbsd/386 signal handling - there is no sigreturn, just
return so that we hit the trampoline.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6215049
This commit is contained in:
Joel Sing 2012-05-16 04:32:49 +10:00
parent 0b7bcb84e3
commit efa67b2c55
3 changed files with 50 additions and 21 deletions
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17
src/pkg/runtime/os_netbsd.h
View File

@ -5,17 +5,22 @@
#define SIG_DFL ((void*)0)
#define SIG_IGN ((void*)1)
#define SIG_BLOCK 1
#define SIG_UNBLOCK 2
#define SIG_SETMASK 3
struct sigaction;
void runtime·sigpanic(void);
void runtime·sigaltstack(Sigaltstack*, Sigaltstack*);
void runtime·sigaction(int32, struct sigaction*, struct sigaction*);
void runtime·raisesigpipe(void);
void runtime·setsig(int32, void(*)(int32, Siginfo*, void*, G*), bool);
void runtime·sighandler(int32 sig, Siginfo *info, void *context, G *gp);
void runtime·setitimer(int32, Itimerval*, Itimerval*);
int32 runtime·sysctl(uint32*, uint32, byte*, uintptr*, byte*, uintptr);
void runtime·sigpanic(void);
void runtime·raisesigpipe(void);
void runtime·sigaction(int32, struct sigaction*, struct sigaction*);
void runtime·sigaltstack(Sigaltstack*, Sigaltstack*);
void runtime·setitimer(int32, Itimerval*, Itimerval*);
void runtime·sigprocmask(int32, Sigset*, Sigset*);
int32 runtime·sysctl(uint32*, uint32, byte*, uintptr*, byte*, uintptr);
#define NSIG 33
#define SI_USER 0

28
src/pkg/runtime/sys_netbsd_386.s
View File

@ -122,12 +122,26 @@ TEXT runtime·nanotime(SB),7,$32
IMULL $1000, BX
ADDL BX, AX
ADCL $0, DX
MOVL ret+0(FP), DI
MOVL AX, 0(DI)
MOVL DX, 4(DI)
RET
TEXT runtime·getcontext(SB),7,$-4
MOVL $307, AX // sys_getcontext
INT $0x80
JAE 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·sigprocmask(SB),7,$-4
MOVL $293, AX // sys_sigprocmask
INT $0x80
JAE 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·sigreturn_tramp(SB),7,$0
LEAL 140(SP), AX // Load address of ucontext
MOVL AX, 4(SP)
@ -166,7 +180,7 @@ TEXT runtime·sigtramp(SB),7,$44
// save g
MOVL g(CX), DI
MOVL DI, 20(SP)
// g = m->gsignal
MOVL m_gsignal(BX), BX
MOVL BX, g(CX)
@ -186,14 +200,6 @@ TEXT runtime·sigtramp(SB),7,$44
get_tls(CX)
MOVL 20(SP), BX
MOVL BX, g(CX)
// call sigreturn
MOVL context+8(FP), AX
MOVL $0, 0(SP) // syscall gap
MOVL AX, 4(SP) // arg 1 - sigcontext
MOVL $103, AX // sys_sigreturn
INT $0x80
MOVL $0xf1, 0xf1 // crash
RET
// int32 rfork_thread(int32 flags, void *stack, M *m, G *g, void (*fn)(void));
@ -255,7 +261,7 @@ TEXT runtime·rfork_thread(SB),7,$8
CALL runtime·settls(SB)
POPL AX
POPAL
// Now segment is established. Initialize m, g.
get_tls(AX)
MOVL DX, g(AX)

26
src/pkg/runtime/sys_netbsd_amd64.s
View File

@ -163,6 +163,24 @@ TEXT runtime·nanotime(SB),7,$32
ADDQ DX, AX
RET
TEXT runtime·getcontext(SB),7,$-8
MOVQ 8(SP), DI // arg 1 - context
MOVL $307, AX // sys_getcontext
SYSCALL
JCC 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·sigprocmask(SB),7,$0
MOVL 8(SP), DI // arg 1 - how
MOVQ 16(SP), SI // arg 2 - set
MOVQ 24(SP), DX // arg 3 - oset
MOVL $293, AX // sys_sigprocmask
SYSCALL
JCC 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·sigreturn_tramp(SB),7,$-8
MOVQ R15, DI // Load address of ucontext
MOVQ $308, AX // sys_setcontext
@ -186,7 +204,7 @@ TEXT runtime·sigaction(SB),7,$-8
TEXT runtime·sigtramp(SB),7,$64
get_tls(BX)
// check that m exists
MOVQ m(BX), BP
CMPQ BP, $0
@ -196,16 +214,16 @@ TEXT runtime·sigtramp(SB),7,$64
// save g
MOVQ g(BX), R10
MOVQ R10, 40(SP)
// g = m->signal
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