mirror of
https://github.com/golang/go
synced 2024-11-06 13:46:16 -07:00
cb6fc99b32
This extends CL 402190 from Linux to the rest of the Unix OSes. Marking sigtramp as TOPFRAME allows gentraceback to stop tracebacks at the end of a signal handler, since there is not much beyond sigtramp. Change-Id: I8b7f5d55d41889f59c0a79c65351b9b0b2d77717 Reviewed-on: https://go-review.googlesource.com/c/go/+/402934 Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Austin Clements <austin@google.com> Auto-Submit: Michael Pratt <mpratt@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Michael Pratt <mpratt@google.com>
441 lines
8.4 KiB
ArmAsm
441 lines
8.4 KiB
ArmAsm
// 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 386, FreeBSD
|
|
// /usr/src/sys/kern/syscalls.master for syscall numbers.
|
|
//
|
|
|
|
#include "go_asm.h"
|
|
#include "go_tls.h"
|
|
#include "textflag.h"
|
|
|
|
TEXT runtime·sys_umtx_op(SB),NOSPLIT,$-4
|
|
MOVL $454, AX
|
|
INT $0x80
|
|
JAE 2(PC)
|
|
NEGL AX
|
|
MOVL AX, ret+20(FP)
|
|
RET
|
|
|
|
TEXT runtime·thr_new(SB),NOSPLIT,$-4
|
|
MOVL $455, AX
|
|
INT $0x80
|
|
JAE 2(PC)
|
|
NEGL AX
|
|
MOVL AX, ret+8(FP)
|
|
RET
|
|
|
|
// Called by OS using C ABI.
|
|
TEXT runtime·thr_start(SB),NOSPLIT,$0
|
|
NOP SP // tell vet SP changed - stop checking offsets
|
|
MOVL 4(SP), AX // m
|
|
MOVL m_g0(AX), BX
|
|
LEAL m_tls(AX), BP
|
|
MOVL m_id(AX), DI
|
|
ADDL $7, DI
|
|
PUSHAL
|
|
PUSHL $32
|
|
PUSHL BP
|
|
PUSHL DI
|
|
CALL runtime·setldt(SB)
|
|
POPL AX
|
|
POPL AX
|
|
POPL AX
|
|
POPAL
|
|
get_tls(CX)
|
|
MOVL BX, g(CX)
|
|
|
|
MOVL AX, g_m(BX)
|
|
CALL runtime·stackcheck(SB) // smashes AX
|
|
CALL runtime·mstart(SB)
|
|
|
|
MOVL 0, AX // crash (not reached)
|
|
|
|
// Exit the entire program (like C exit)
|
|
TEXT runtime·exit(SB),NOSPLIT,$-4
|
|
MOVL $1, AX
|
|
INT $0x80
|
|
MOVL $0xf1, 0xf1 // crash
|
|
RET
|
|
|
|
GLOBL exitStack<>(SB),RODATA,$8
|
|
DATA exitStack<>+0x00(SB)/4, $0
|
|
DATA exitStack<>+0x04(SB)/4, $0
|
|
|
|
// func exitThread(wait *uint32)
|
|
TEXT runtime·exitThread(SB),NOSPLIT,$0-4
|
|
MOVL wait+0(FP), AX
|
|
// We're done using the stack.
|
|
MOVL $0, (AX)
|
|
// thr_exit takes a single pointer argument, which it expects
|
|
// on the stack. We want to pass 0, so switch over to a fake
|
|
// stack of 0s. It won't write to the stack.
|
|
MOVL $exitStack<>(SB), SP
|
|
MOVL $431, AX // thr_exit
|
|
INT $0x80
|
|
MOVL $0xf1, 0xf1 // crash
|
|
JMP 0(PC)
|
|
|
|
TEXT runtime·open(SB),NOSPLIT,$-4
|
|
MOVL $5, AX
|
|
INT $0x80
|
|
JAE 2(PC)
|
|
MOVL $-1, AX
|
|
MOVL AX, ret+12(FP)
|
|
RET
|
|
|
|
TEXT runtime·closefd(SB),NOSPLIT,$-4
|
|
MOVL $6, AX
|
|
INT $0x80
|
|
JAE 2(PC)
|
|
MOVL $-1, AX
|
|
MOVL AX, ret+4(FP)
|
|
RET
|
|
|
|
TEXT runtime·read(SB),NOSPLIT,$-4
|
|
MOVL $3, AX
|
|
INT $0x80
|
|
JAE 2(PC)
|
|
NEGL AX // caller expects negative errno
|
|
MOVL AX, ret+12(FP)
|
|
RET
|
|
|
|
// func pipe2(flags int32) (r, w int32, errno int32)
|
|
TEXT runtime·pipe2(SB),NOSPLIT,$12-16
|
|
MOVL $542, AX
|
|
LEAL r+4(FP), BX
|
|
MOVL BX, 4(SP)
|
|
MOVL flags+0(FP), BX
|
|
MOVL BX, 8(SP)
|
|
INT $0x80
|
|
JAE 2(PC)
|
|
NEGL AX
|
|
MOVL AX, errno+12(FP)
|
|
RET
|
|
|
|
TEXT runtime·write1(SB),NOSPLIT,$-4
|
|
MOVL $4, AX
|
|
INT $0x80
|
|
JAE 2(PC)
|
|
NEGL AX // caller expects negative errno
|
|
MOVL AX, ret+12(FP)
|
|
RET
|
|
|
|
TEXT runtime·thr_self(SB),NOSPLIT,$8-4
|
|
// thr_self(&0(FP))
|
|
LEAL ret+0(FP), AX
|
|
MOVL AX, 4(SP)
|
|
MOVL $432, AX
|
|
INT $0x80
|
|
RET
|
|
|
|
TEXT runtime·thr_kill(SB),NOSPLIT,$-4
|
|
// thr_kill(tid, sig)
|
|
MOVL $433, AX
|
|
INT $0x80
|
|
RET
|
|
|
|
TEXT runtime·raiseproc(SB),NOSPLIT,$16
|
|
// getpid
|
|
MOVL $20, AX
|
|
INT $0x80
|
|
// kill(self, sig)
|
|
MOVL AX, 4(SP)
|
|
MOVL sig+0(FP), AX
|
|
MOVL AX, 8(SP)
|
|
MOVL $37, AX
|
|
INT $0x80
|
|
RET
|
|
|
|
TEXT runtime·mmap(SB),NOSPLIT,$32
|
|
LEAL addr+0(FP), SI
|
|
LEAL 4(SP), DI
|
|
CLD
|
|
MOVSL
|
|
MOVSL
|
|
MOVSL
|
|
MOVSL
|
|
MOVSL
|
|
MOVSL
|
|
MOVL $0, AX // top 32 bits of file offset
|
|
STOSL
|
|
MOVL $477, AX
|
|
INT $0x80
|
|
JAE ok
|
|
MOVL $0, p+24(FP)
|
|
MOVL AX, err+28(FP)
|
|
RET
|
|
ok:
|
|
MOVL AX, p+24(FP)
|
|
MOVL $0, err+28(FP)
|
|
RET
|
|
|
|
TEXT runtime·munmap(SB),NOSPLIT,$-4
|
|
MOVL $73, AX
|
|
INT $0x80
|
|
JAE 2(PC)
|
|
MOVL $0xf1, 0xf1 // crash
|
|
RET
|
|
|
|
TEXT runtime·madvise(SB),NOSPLIT,$-4
|
|
MOVL $75, AX // madvise
|
|
INT $0x80
|
|
JAE 2(PC)
|
|
MOVL $-1, AX
|
|
MOVL AX, ret+12(FP)
|
|
RET
|
|
|
|
TEXT runtime·setitimer(SB), NOSPLIT, $-4
|
|
MOVL $83, AX
|
|
INT $0x80
|
|
RET
|
|
|
|
// func fallback_walltime() (sec int64, nsec int32)
|
|
TEXT runtime·fallback_walltime(SB), NOSPLIT, $32-12
|
|
MOVL $232, AX // clock_gettime
|
|
LEAL 12(SP), BX
|
|
MOVL $0, 4(SP) // CLOCK_REALTIME
|
|
MOVL BX, 8(SP)
|
|
INT $0x80
|
|
MOVL 12(SP), AX // sec
|
|
MOVL 16(SP), BX // nsec
|
|
|
|
// sec is in AX, nsec in BX
|
|
MOVL AX, sec_lo+0(FP)
|
|
MOVL $0, sec_hi+4(FP)
|
|
MOVL BX, nsec+8(FP)
|
|
RET
|
|
|
|
// func fallback_nanotime() int64
|
|
TEXT runtime·fallback_nanotime(SB), NOSPLIT, $32-8
|
|
MOVL $232, AX
|
|
LEAL 12(SP), BX
|
|
MOVL $4, 4(SP) // CLOCK_MONOTONIC
|
|
MOVL BX, 8(SP)
|
|
INT $0x80
|
|
MOVL 12(SP), AX // sec
|
|
MOVL 16(SP), BX // nsec
|
|
|
|
// sec is in AX, nsec in BX
|
|
// convert to DX:AX nsec
|
|
MOVL $1000000000, CX
|
|
MULL CX
|
|
ADDL BX, AX
|
|
ADCL $0, DX
|
|
|
|
MOVL AX, ret_lo+0(FP)
|
|
MOVL DX, ret_hi+4(FP)
|
|
RET
|
|
|
|
|
|
TEXT runtime·asmSigaction(SB),NOSPLIT,$-4
|
|
MOVL $416, AX
|
|
INT $0x80
|
|
MOVL AX, ret+12(FP)
|
|
RET
|
|
|
|
TEXT runtime·sigfwd(SB),NOSPLIT,$12-16
|
|
MOVL fn+0(FP), AX
|
|
MOVL sig+4(FP), BX
|
|
MOVL info+8(FP), CX
|
|
MOVL ctx+12(FP), DX
|
|
MOVL SP, SI
|
|
SUBL $32, SP
|
|
ANDL $~15, SP // align stack: handler might be a C function
|
|
MOVL BX, 0(SP)
|
|
MOVL CX, 4(SP)
|
|
MOVL DX, 8(SP)
|
|
MOVL SI, 12(SP) // save SI: handler might be a Go function
|
|
CALL AX
|
|
MOVL 12(SP), AX
|
|
MOVL AX, SP
|
|
RET
|
|
|
|
// Called by OS using C ABI.
|
|
TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME,$12
|
|
NOP SP // tell vet SP changed - stop checking offsets
|
|
MOVL 16(SP), BX // signo
|
|
MOVL BX, 0(SP)
|
|
MOVL 20(SP), BX // info
|
|
MOVL BX, 4(SP)
|
|
MOVL 24(SP), BX // context
|
|
MOVL BX, 8(SP)
|
|
CALL runtime·sigtrampgo(SB)
|
|
|
|
// call sigreturn
|
|
MOVL 24(SP), AX // context
|
|
MOVL $0, 0(SP) // syscall gap
|
|
MOVL AX, 4(SP)
|
|
MOVL $417, AX // sigreturn(ucontext)
|
|
INT $0x80
|
|
MOVL $0xf1, 0xf1 // crash
|
|
RET
|
|
|
|
TEXT runtime·sigaltstack(SB),NOSPLIT,$0
|
|
MOVL $53, AX
|
|
INT $0x80
|
|
JAE 2(PC)
|
|
MOVL $0xf1, 0xf1 // crash
|
|
RET
|
|
|
|
TEXT runtime·usleep(SB),NOSPLIT,$20
|
|
MOVL $0, DX
|
|
MOVL usec+0(FP), AX
|
|
MOVL $1000000, CX
|
|
DIVL CX
|
|
MOVL AX, 12(SP) // tv_sec
|
|
MOVL $1000, AX
|
|
MULL DX
|
|
MOVL AX, 16(SP) // tv_nsec
|
|
|
|
MOVL $0, 0(SP)
|
|
LEAL 12(SP), AX
|
|
MOVL AX, 4(SP) // arg 1 - rqtp
|
|
MOVL $0, 8(SP) // arg 2 - rmtp
|
|
MOVL $240, AX // sys_nanosleep
|
|
INT $0x80
|
|
RET
|
|
|
|
/*
|
|
descriptor entry format for system call
|
|
is the native machine format, ugly as it is:
|
|
|
|
2-byte limit
|
|
3-byte base
|
|
1-byte: 0x80=present, 0x60=dpl<<5, 0x1F=type
|
|
1-byte: 0x80=limit is *4k, 0x40=32-bit operand size,
|
|
0x0F=4 more bits of limit
|
|
1 byte: 8 more bits of base
|
|
|
|
int i386_get_ldt(int, union ldt_entry *, int);
|
|
int i386_set_ldt(int, const union ldt_entry *, int);
|
|
|
|
*/
|
|
|
|
// setldt(int entry, int address, int limit)
|
|
TEXT runtime·setldt(SB),NOSPLIT,$32
|
|
MOVL base+4(FP), BX
|
|
// see comment in sys_linux_386.s; freebsd is similar
|
|
ADDL $0x4, BX
|
|
|
|
// set up data_desc
|
|
LEAL 16(SP), AX // struct data_desc
|
|
MOVL $0, 0(AX)
|
|
MOVL $0, 4(AX)
|
|
|
|
MOVW BX, 2(AX)
|
|
SHRL $16, BX
|
|
MOVB BX, 4(AX)
|
|
SHRL $8, BX
|
|
MOVB BX, 7(AX)
|
|
|
|
MOVW $0xffff, 0(AX)
|
|
MOVB $0xCF, 6(AX) // 32-bit operand, 4k limit unit, 4 more bits of limit
|
|
|
|
MOVB $0xF2, 5(AX) // r/w data descriptor, dpl=3, present
|
|
|
|
// call i386_set_ldt(entry, desc, 1)
|
|
MOVL $0xffffffff, 0(SP) // auto-allocate entry and return in AX
|
|
MOVL AX, 4(SP)
|
|
MOVL $1, 8(SP)
|
|
CALL i386_set_ldt<>(SB)
|
|
|
|
// compute segment selector - (entry*8+7)
|
|
SHLL $3, AX
|
|
ADDL $7, AX
|
|
MOVW AX, GS
|
|
RET
|
|
|
|
TEXT i386_set_ldt<>(SB),NOSPLIT,$16
|
|
LEAL args+0(FP), AX // 0(FP) == 4(SP) before SP got moved
|
|
MOVL $0, 0(SP) // syscall gap
|
|
MOVL $1, 4(SP)
|
|
MOVL AX, 8(SP)
|
|
MOVL $165, AX
|
|
INT $0x80
|
|
JAE 2(PC)
|
|
INT $3
|
|
RET
|
|
|
|
TEXT runtime·sysctl(SB),NOSPLIT,$28
|
|
LEAL mib+0(FP), SI
|
|
LEAL 4(SP), DI
|
|
CLD
|
|
MOVSL // arg 1 - name
|
|
MOVSL // arg 2 - namelen
|
|
MOVSL // arg 3 - oldp
|
|
MOVSL // arg 4 - oldlenp
|
|
MOVSL // arg 5 - newp
|
|
MOVSL // arg 6 - newlen
|
|
MOVL $202, AX // sys___sysctl
|
|
INT $0x80
|
|
JAE 4(PC)
|
|
NEGL AX
|
|
MOVL AX, ret+24(FP)
|
|
RET
|
|
MOVL $0, AX
|
|
MOVL AX, ret+24(FP)
|
|
RET
|
|
|
|
TEXT runtime·osyield(SB),NOSPLIT,$-4
|
|
MOVL $331, AX // sys_sched_yield
|
|
INT $0x80
|
|
RET
|
|
|
|
TEXT runtime·sigprocmask(SB),NOSPLIT,$16
|
|
MOVL $0, 0(SP) // syscall gap
|
|
MOVL how+0(FP), AX // arg 1 - how
|
|
MOVL AX, 4(SP)
|
|
MOVL new+4(FP), AX
|
|
MOVL AX, 8(SP) // arg 2 - set
|
|
MOVL old+8(FP), AX
|
|
MOVL AX, 12(SP) // arg 3 - oset
|
|
MOVL $340, AX // sys_sigprocmask
|
|
INT $0x80
|
|
JAE 2(PC)
|
|
MOVL $0xf1, 0xf1 // crash
|
|
RET
|
|
|
|
// int32 runtime·kqueue(void);
|
|
TEXT runtime·kqueue(SB),NOSPLIT,$0
|
|
MOVL $362, AX
|
|
INT $0x80
|
|
JAE 2(PC)
|
|
NEGL AX
|
|
MOVL AX, ret+0(FP)
|
|
RET
|
|
|
|
// int32 runtime·kevent(int kq, Kevent *changelist, int nchanges, Kevent *eventlist, int nevents, Timespec *timeout);
|
|
TEXT runtime·kevent(SB),NOSPLIT,$0
|
|
MOVL $363, AX
|
|
INT $0x80
|
|
JAE 2(PC)
|
|
NEGL AX
|
|
MOVL AX, ret+24(FP)
|
|
RET
|
|
|
|
// int32 runtime·closeonexec(int32 fd);
|
|
TEXT runtime·closeonexec(SB),NOSPLIT,$32
|
|
MOVL $92, AX // fcntl
|
|
// 0(SP) is where the caller PC would be; kernel skips it
|
|
MOVL fd+0(FP), BX
|
|
MOVL BX, 4(SP) // fd
|
|
MOVL $2, 8(SP) // F_SETFD
|
|
MOVL $1, 12(SP) // FD_CLOEXEC
|
|
INT $0x80
|
|
JAE 2(PC)
|
|
NEGL AX
|
|
RET
|
|
|
|
// func cpuset_getaffinity(level int, which int, id int64, size int, mask *byte) int32
|
|
TEXT runtime·cpuset_getaffinity(SB), NOSPLIT, $0-28
|
|
MOVL $487, AX
|
|
INT $0x80
|
|
JAE 2(PC)
|
|
NEGL AX
|
|
MOVL AX, ret+24(FP)
|
|
RET
|
|
|
|
GLOBL runtime·tlsoffset(SB),NOPTR,$4
|