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runtime: make go work on netbsd/386

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R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6254055
This commit is contained in:
Joel Sing 2012-05-30 02:52:50 +10:00
parent 992a11b88b
commit fb32d60cd1
3 changed files with 28 additions and 52 deletions
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11
src/pkg/runtime/signal_netbsd_386.c
View file

@ -7,6 +7,7 @@
#include "signals_GOOS.h"
#include "os_GOOS.h"
extern void runtime·lwp_tramp(void);
extern void runtime·sigtramp(void);
typedef struct sigaction {
@ -136,3 +137,13 @@ runtime·setsig(int32 i, void (*fn)(int32, Siginfo*, void*, G*), bool restart)
sa._sa_u._sa_sigaction = (void*)fn;
runtime·sigaction(i, &sa, nil);
}
void
runtime·lwp_mcontext_init(McontextT *mc, void *stack, M *m, G *g, void (*fn)(void))
{
mc->__gregs[REG_EIP] = (uint32)runtime·lwp_tramp;
mc->__gregs[REG_UESP] = (uint32)stack;
mc->__gregs[REG_EBX] = (uint32)m;
mc->__gregs[REG_EDX] = (uint32)g;
mc->__gregs[REG_ESI] = (uint32)fn;
}

67
src/pkg/runtime/sys_netbsd_386.s
View file

@ -202,57 +202,22 @@ TEXT runtime·sigtramp(SB),7,$44
MOVL BX, g(CX)
RET
// int32 rfork_thread(int32 flags, void *stack, M *m, G *g, void (*fn)(void));
TEXT runtime·rfork_thread(SB),7,$8
MOVL flags+8(SP), AX
MOVL stack+12(SP), CX
// Copy m, g, fn off parent stack for use by child.
SUBL $16, CX
MOVL mm+16(SP), SI
MOVL SI, 0(CX)
MOVL gg+20(SP), SI
MOVL SI, 4(CX)
MOVL fn+24(SP), SI
MOVL SI, 8(CX)
MOVL $1234, 12(CX)
MOVL CX, SI
MOVL $0, 0(SP) // syscall gap
MOVL AX, 4(SP) // arg 1 - flags
MOVL $251, AX // sys_rfork
// int32 lwp_create(void *context, uintptr flags, void *lwpid);
TEXT runtime·lwp_create(SB),7,$16
MOVL $0, 0(SP)
MOVL context+0(FP), AX
MOVL AX, 4(SP) // arg 1 - context
MOVL flags+4(FP), AX
MOVL AX, 8(SP) // arg 2 - flags
MOVL lwpid+8(FP), AX
MOVL AX, 12(SP) // arg 3 - lwpid
MOVL $309, AX // sys__lwp_create
INT $0x80
// Return if rfork syscall failed
JCC 4(PC)
JCC 2(PC)
NEGL AX
MOVL AX, 48(SP)
RET
// In parent, return.
CMPL AX, $0
JEQ 3(PC)
MOVL AX, 48(SP)
RET
// In child, on new stack.
MOVL SI, SP
// Paranoia: check that SP is as we expect.
MOVL 12(SP), BP
CMPL BP, $1234
JEQ 2(PC)
INT $3
// Reload registers
MOVL 0(SP), BX // m
MOVL 4(SP), DX // g
MOVL 8(SP), SI // fn
// Initialize m->procid to thread ID
MOVL $299, AX // sys_getthrid
INT $0x80
MOVL AX, m_procid(BX)
TEXT runtime·lwp_tramp(SB),7,$0
// Set FS to point at m->tls
LEAL m_tls(BX), BP
@ -317,13 +282,13 @@ TEXT runtime·osyield(SB),7,$-4
INT $0x80
RET
TEXT runtime·thrsleep(SB),7,$-4
MOVL $300, AX // sys_thrsleep
TEXT runtime·lwp_park(SB),7,$-4
MOVL $434, AX // sys__lwp_park
INT $0x80
RET
TEXT runtime·thrwakeup(SB),7,$-4
MOVL $301, AX // sys_thrwakeup
TEXT runtime·lwp_unpark(SB),7,$-4
MOVL $321, AX // sys__lwp_unpark
INT $0x80
RET

2
src/pkg/runtime/sys_netbsd_amd64.s
View file

@ -8,7 +8,7 @@
#include "zasm_GOOS_GOARCH.h"
// int64 lwp_create(void *context, uintptr flags, void *lwpid)
// int32 lwp_create(void *context, uintptr flags, void *lwpid)
TEXT runtime·lwp_create(SB),7,$0
MOVQ context+0(FP), DI