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|
// 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, OpenBSD
// System calls are implemented in libc/libpthread, this file
// contains trampolines that convert from Go to C calling convention.
// Some direct system call implementations currently remain.
//
#include "go_asm.h"
#include "go_tls.h"
#include "textflag.h"
#define CLOCK_MONOTONIC $3
TEXT runtime·setldt(SB),NOSPLIT,$0
// Nothing to do, pthread already set thread-local storage up.
RET
// mstart_stub is the first function executed on a new thread started by pthread_create.
// It just does some low-level setup and then calls mstart.
// Note: called with the C calling convention.
TEXT runtime·mstart_stub(SB),NOSPLIT,$28
NOP SP // tell vet SP changed - stop checking offsets
// We are already on m's g0 stack.
// Save callee-save registers.
MOVL BX, bx-4(SP)
MOVL BP, bp-8(SP)
MOVL SI, si-12(SP)
MOVL DI, di-16(SP)
MOVL 32(SP), AX // m
MOVL m_g0(AX), DX
get_tls(CX)
MOVL DX, g(CX)
CALL runtime·mstart(SB)
// Restore callee-save registers.
MOVL di-16(SP), DI
MOVL si-12(SP), SI
MOVL bp-8(SP), BP
MOVL bx-4(SP), BX
// Go is all done with this OS thread.
// Tell pthread everything is ok (we never join with this thread, so
// the value here doesn't really matter).
MOVL $0, AX
RET
TEXT runtime·sigfwd(SB),NOSPLIT,$0-16
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,$28
NOP SP // tell vet SP changed - stop checking offsets
// Save callee-saved C registers, since the caller may be a C signal handler.
MOVL BX, bx-4(SP)
MOVL BP, bp-8(SP)
MOVL SI, si-12(SP)
MOVL DI, di-16(SP)
// We don't save mxcsr or the x87 control word because sigtrampgo doesn't
// modify them.
MOVL 32(SP), BX // signo
MOVL BX, 0(SP)
MOVL 36(SP), BX // info
MOVL BX, 4(SP)
MOVL 40(SP), BX // context
MOVL BX, 8(SP)
CALL runtime·sigtrampgo(SB)
MOVL di-16(SP), DI
MOVL si-12(SP), SI
MOVL bp-8(SP), BP
MOVL bx-4(SP), BX
RET
// These trampolines help convert from Go calling convention to C calling convention.
// They should be called with asmcgocall - note that while asmcgocall does
// stack alignment, creation of a frame undoes it again.
// A pointer to the arguments is passed on the stack.
// A single int32 result is returned in AX.
// (For more results, make an args/results structure.)
TEXT runtime·pthread_attr_init_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $4, SP
MOVL 12(SP), DX // pointer to args
MOVL 0(DX), AX
MOVL AX, 0(SP) // arg 1 - attr
CALL libc_pthread_attr_init(SB)
MOVL BP, SP
POPL BP
RET
TEXT runtime·pthread_attr_destroy_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $4, SP
MOVL 12(SP), DX // pointer to args
MOVL 0(DX), AX
MOVL AX, 0(SP) // arg 1 - attr
CALL libc_pthread_attr_destroy(SB)
MOVL BP, SP
POPL BP
RET
TEXT runtime·pthread_attr_getstacksize_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $8, SP
MOVL 16(SP), DX // pointer to args
MOVL 0(DX), AX
MOVL 4(DX), BX
MOVL AX, 0(SP) // arg 1 - attr
MOVL BX, 4(SP) // arg 2 - size
CALL libc_pthread_attr_getstacksize(SB)
MOVL BP, SP
POPL BP
RET
TEXT runtime·pthread_attr_setdetachstate_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $8, SP
MOVL 16(SP), DX // pointer to args
MOVL 0(DX), AX
MOVL 4(DX), BX
MOVL AX, 0(SP) // arg 1 - attr
MOVL BX, 4(SP) // arg 2 - state
CALL libc_pthread_attr_setdetachstate(SB)
MOVL BP, SP
POPL BP
RET
TEXT runtime·pthread_create_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $20, SP
MOVL 28(SP), DX // pointer to args
LEAL 16(SP), AX
MOVL AX, 0(SP) // arg 1 - &threadid (discarded)
MOVL 0(DX), AX
MOVL 4(DX), BX
MOVL 8(DX), CX
MOVL AX, 4(SP) // arg 2 - attr
MOVL BX, 8(SP) // arg 3 - start
MOVL CX, 12(SP) // arg 4 - arg
CALL libc_pthread_create(SB)
MOVL BP, SP
POPL BP
RET
TEXT runtime·thrkill_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $12, SP
MOVL 20(SP), DX // pointer to args
MOVL 0(DX), AX
MOVL 4(DX), BX
MOVL AX, 0(SP) // arg 1 - tid
MOVL BX, 4(SP) // arg 2 - signal
MOVL $0, 8(SP) // arg 3 - tcb
CALL libc_thrkill(SB)
MOVL BP, SP
POPL BP
RET
TEXT runtime·thrsleep_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $20, SP
MOVL 28(SP), DX // pointer to args
MOVL 0(DX), AX
MOVL 4(DX), BX
MOVL 8(DX), CX
MOVL AX, 0(SP) // arg 1 - id
MOVL BX, 4(SP) // arg 2 - clock_id
MOVL CX, 8(SP) // arg 3 - abstime
MOVL 12(DX), AX
MOVL 16(DX), BX
MOVL AX, 12(SP) // arg 4 - lock
MOVL BX, 16(SP) // arg 5 - abort
CALL libc_thrsleep(SB)
MOVL BP, SP
POPL BP
RET
TEXT runtime·thrwakeup_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $8, SP
MOVL 16(SP), DX // pointer to args
MOVL 0(DX), AX
MOVL 4(DX), BX
MOVL AX, 0(SP) // arg 1 - id
MOVL BX, 4(SP) // arg 2 - count
CALL libc_thrwakeup(SB)
MOVL BP, SP
POPL BP
RET
TEXT runtime·exit_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $4, SP
MOVL 12(SP), DX // pointer to args
MOVL 0(DX), AX
MOVL AX, 0(SP) // arg 1 - status
CALL libc_exit(SB)
MOVL $0xf1, 0xf1 // crash on failure
MOVL BP, SP
POPL BP
RET
TEXT runtime·getthrid_trampoline(SB),NOSPLIT,$0
PUSHL BP
CALL libc_getthrid(SB)
NOP SP // tell vet SP changed - stop checking offsets
MOVL 8(SP), DX // pointer to return value
MOVL AX, 0(DX)
POPL BP
RET
TEXT runtime·raiseproc_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $8, SP
MOVL 16(SP), DX
MOVL 0(DX), BX
CALL libc_getpid(SB)
MOVL AX, 0(SP) // arg 1 - pid
MOVL BX, 4(SP) // arg 2 - signal
CALL libc_kill(SB)
MOVL BP, SP
POPL BP
RET
TEXT runtime·sched_yield_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
CALL libc_sched_yield(SB)
MOVL BP, SP
POPL BP
RET
TEXT runtime·mmap_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $32, SP
MOVL 40(SP), DX // pointer to args
MOVL 0(DX), AX
MOVL 4(DX), BX
MOVL 8(DX), CX
MOVL AX, 0(SP) // arg 1 - addr
MOVL BX, 4(SP) // arg 2 - len
MOVL CX, 8(SP) // arg 3 - prot
MOVL 12(DX), AX
MOVL 16(DX), BX
MOVL 20(DX), CX
MOVL AX, 12(SP) // arg 4 - flags
MOVL BX, 16(SP) // arg 5 - fid
MOVL $0, 20(SP) // pad
MOVL CX, 24(SP) // arg 6 - offset (low 32 bits)
MOVL $0, 28(SP) // offset (high 32 bits)
CALL libc_mmap(SB)
MOVL $0, BX
CMPL AX, $-1
JNE ok
CALL libc_errno(SB)
MOVL (AX), BX
MOVL $0, AX
ok:
MOVL 40(SP), DX
MOVL AX, 24(DX)
MOVL BX, 28(DX)
MOVL BP, SP
POPL BP
RET
TEXT runtime·munmap_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $8, SP
MOVL 16(SP), DX // pointer to args
MOVL 0(DX), AX
MOVL 4(DX), BX
MOVL AX, 0(SP) // arg 1 - addr
MOVL BX, 4(SP) // arg 2 - len
CALL libc_munmap(SB)
CMPL AX, $-1
JNE 2(PC)
MOVL $0xf1, 0xf1 // crash on failure
MOVL BP, SP
POPL BP
RET
TEXT runtime·madvise_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $12, SP
MOVL 20(SP), DX // pointer to args
MOVL 0(DX), AX
MOVL 4(DX), BX
MOVL 8(DX), CX
MOVL AX, 0(SP) // arg 1 - addr
MOVL BX, 4(SP) // arg 2 - len
MOVL CX, 8(SP) // arg 3 - advice
CALL libc_madvise(SB)
// ignore failure - maybe pages are locked
MOVL BP, SP
POPL BP
RET
TEXT runtime·open_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $16, SP
MOVL 24(SP), DX // pointer to args
MOVL 0(DX), AX
MOVL 4(DX), BX
MOVL 8(DX), CX
MOVL AX, 0(SP) // arg 1 - path
MOVL BX, 4(SP) // arg 2 - flags
MOVL CX, 8(SP) // arg 3 - mode
MOVL $0, 12(SP) // vararg
CALL libc_open(SB)
MOVL BP, SP
POPL BP
RET
TEXT runtime·close_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $4, SP
MOVL 12(SP), DX
MOVL 0(DX), AX
MOVL AX, 0(SP) // arg 1 - fd
CALL libc_close(SB)
MOVL BP, SP
POPL BP
RET
TEXT runtime·read_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $12, SP
MOVL 20(SP), DX // pointer to args
MOVL 0(DX), AX
MOVL 4(DX), BX
MOVL 8(DX), CX
MOVL AX, 0(SP) // arg 1 - fd
MOVL BX, 4(SP) // arg 2 - buf
MOVL CX, 8(SP) // arg 3 - count
CALL libc_read(SB)
CMPL AX, $-1
JNE noerr
CALL libc_errno(SB)
MOVL (AX), AX
NEGL AX // caller expects negative errno
noerr:
MOVL BP, SP
POPL BP
RET
TEXT runtime·write_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $12, SP
MOVL 20(SP), DX // pointer to args
MOVL 0(DX), AX
MOVL 4(DX), BX
MOVL 8(DX), CX
MOVL AX, 0(SP) // arg 1 - fd
MOVL BX, 4(SP) // arg 2 - buf
MOVL CX, 8(SP) // arg 3 - count
CALL libc_write(SB)
CMPL AX, $-1
JNE noerr
CALL libc_errno(SB)
MOVL (AX), AX
NEGL AX // caller expects negative errno
noerr:
MOVL BP, SP
POPL BP
RET
TEXT runtime·pipe2_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $8, SP
MOVL 16(SP), DX // pointer to args
MOVL 0(DX), AX
MOVL 4(DX), BX
MOVL AX, 0(SP) // arg 1 - fds
MOVL BX, 4(SP) // arg 2 - flags
CALL libc_pipe2(SB)
CMPL AX, $-1
JNE noerr
CALL libc_errno(SB)
MOVL (AX), AX
NEGL AX // caller expects negative errno
noerr:
MOVL BP, SP
POPL BP
RET
TEXT runtime·setitimer_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $12, SP
MOVL 20(SP), DX // pointer to args
MOVL 0(DX), AX
MOVL 4(DX), BX
MOVL 8(DX), CX
MOVL AX, 0(SP) // arg 1 - which
MOVL BX, 4(SP) // arg 2 - new
MOVL CX, 8(SP) // arg 3 - old
CALL libc_setitimer(SB)
MOVL BP, SP
POPL BP
RET
TEXT runtime·usleep_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $4, SP
MOVL 12(SP), DX // pointer to args
MOVL 0(DX), AX
MOVL AX, 0(SP)
CALL libc_usleep(SB)
MOVL BP, SP
POPL BP
RET
TEXT runtime·sysctl_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $24, SP
MOVL 32(SP), DX // pointer to args
MOVL 0(DX), AX
MOVL 4(DX), BX
MOVL 8(DX), CX
MOVL AX, 0(SP) // arg 1 - name
MOVL BX, 4(SP) // arg 2 - namelen
MOVL CX, 8(SP) // arg 3 - old
MOVL 12(DX), AX
MOVL 16(DX), BX
MOVL 20(DX), CX
MOVL AX, 12(SP) // arg 4 - oldlenp
MOVL BX, 16(SP) // arg 5 - newp
MOVL CX, 20(SP) // arg 6 - newlen
CALL libc_sysctl(SB)
MOVL BP, SP
POPL BP
RET
TEXT runtime·kqueue_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
CALL libc_kqueue(SB)
MOVL BP, SP
POPL BP
RET
TEXT runtime·kevent_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $24, SP
MOVL 32(SP), DX // pointer to args
MOVL 0(DX), AX
MOVL 4(DX), BX
MOVL 8(DX), CX
MOVL AX, 0(SP) // arg 1 - kq
MOVL BX, 4(SP) // arg 2 - keventt
MOVL CX, 8(SP) // arg 3 - nch
MOVL 12(DX), AX
MOVL 16(DX), BX
MOVL 20(DX), CX
MOVL AX, 12(SP) // arg 4 - ev
MOVL BX, 16(SP) // arg 5 - nev
MOVL CX, 20(SP) // arg 6 - ts
CALL libc_kevent(SB)
CMPL AX, $-1
JNE noerr
CALL libc_errno(SB)
MOVL (AX), AX
NEGL AX // caller expects negative errno
noerr:
MOVL BP, SP
POPL BP
RET
TEXT runtime·clock_gettime_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $8, SP
MOVL 16(SP), DX // pointer to args
MOVL 0(DX), AX
MOVL 4(DX), BX
MOVL AX, 0(SP) // arg 1 - tp
MOVL BX, 4(SP) // arg 2 - clock_id
CALL libc_clock_gettime(SB)
CMPL AX, $-1
JNE noerr
CALL libc_errno(SB)
MOVL (AX), AX
NEGL AX // caller expects negative errno
noerr:
MOVL BP, SP
POPL BP
RET
TEXT runtime·fcntl_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $16, SP
MOVL 24(SP), DX // pointer to args
MOVL 0(DX), AX
MOVL 4(DX), BX
MOVL 8(DX), CX
MOVL AX, 0(SP) // arg 1 - fd
MOVL BX, 4(SP) // arg 2 - cmd
MOVL CX, 8(SP) // arg 3 - arg
MOVL $0, 12(SP) // vararg
CALL libc_fcntl(SB)
MOVL $0, BX
CMPL AX, $-1
JNE noerr
CALL libc_errno(SB)
MOVL (AX), BX
MOVL $-1, AX
noerr:
MOVL 24(SP), DX // pointer to args
MOVL AX, 12(DX)
MOVL BX, 16(DX)
MOVL BP, SP
POPL BP
RET
TEXT runtime·sigaction_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $12, SP
MOVL 20(SP), DX // pointer to args
MOVL 0(DX), AX
MOVL 4(DX), BX
MOVL 8(DX), CX
MOVL AX, 0(SP) // arg 1 - sig
MOVL BX, 4(SP) // arg 2 - new
MOVL CX, 8(SP) // arg 3 - old
CALL libc_sigaction(SB)
CMPL AX, $-1
JNE 2(PC)
MOVL $0xf1, 0xf1 // crash on failure
MOVL BP, SP
POPL BP
RET
TEXT runtime·sigprocmask_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $12, SP
MOVL 20(SP), DX // pointer to args
MOVL 0(DX), AX
MOVL 4(DX), BX
MOVL 8(DX), CX
MOVL AX, 0(SP) // arg 1 - how
MOVL BX, 4(SP) // arg 2 - new
MOVL CX, 8(SP) // arg 3 - old
CALL libc_pthread_sigmask(SB)
CMPL AX, $-1
JNE 2(PC)
MOVL $0xf1, 0xf1 // crash on failure
MOVL BP, SP
POPL BP
RET
TEXT runtime·sigaltstack_trampoline(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $8, SP
MOVL 16(SP), DX // pointer to args
MOVL 0(DX), AX
MOVL 4(DX), BX
MOVL AX, 0(SP) // arg 1 - new
MOVL BX, 4(SP) // arg 2 - old
CALL libc_sigaltstack(SB)
CMPL AX, $-1
JNE 2(PC)
MOVL $0xf1, 0xf1 // crash on failure
MOVL BP, SP
POPL BP
RET
// syscall calls a function in libc on behalf of the syscall package.
// syscall takes a pointer to a struct like:
// struct {
// fn uintptr
// a1 uintptr
// a2 uintptr
// a3 uintptr
// r1 uintptr
// r2 uintptr
// err uintptr
// }
// syscall must be called on the g0 stack with the
// C calling convention (use libcCall).
//
// syscall expects a 32-bit result and tests for 32-bit -1
// to decide there was an error.
TEXT runtime·syscall(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $12, SP
MOVL 20(SP), BX // pointer to args
MOVL (1*4)(BX), AX
MOVL (2*4)(BX), CX
MOVL (3*4)(BX), DX
MOVL AX, (0*4)(SP) // a1
MOVL CX, (1*4)(SP) // a2
MOVL DX, (2*4)(SP) // a3
MOVL (0*4)(BX), AX // fn
CALL AX
MOVL AX, (4*4)(BX) // r1
MOVL DX, (5*4)(BX) // r2
// Standard libc functions return -1 on error and set errno.
CMPL AX, $-1
JNE ok
// Get error code from libc.
CALL libc_errno(SB)
MOVL (AX), AX
MOVW AX, (6*4)(BX) // err
ok:
MOVL $0, AX // no error (it's ignored anyway)
MOVL BP, SP
POPL BP
RET
// syscallX calls a function in libc on behalf of the syscall package.
// syscallX takes a pointer to a struct like:
// struct {
// fn uintptr
// a1 uintptr
// a2 uintptr
// a3 uintptr
// r1 uintptr
// r2 uintptr
// err uintptr
// }
// syscallX must be called on the g0 stack with the
// C calling convention (use libcCall).
//
// syscallX is like syscall but expects a 64-bit result
// and tests for 64-bit -1 to decide there was an error.
TEXT runtime·syscallX(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $12, SP
MOVL 20(SP), BX // pointer to args
MOVL (1*4)(BX), AX
MOVL (2*4)(BX), CX
MOVL (3*4)(BX), DX
MOVL AX, (0*4)(SP) // a1
MOVL CX, (1*4)(SP) // a2
MOVL DX, (2*4)(SP) // a3
MOVL (0*4)(BX), AX // fn
CALL AX
MOVL AX, (4*4)(BX) // r1
MOVL DX, (5*4)(BX) // r2
// Standard libc functions return -1 on error and set errno.
CMPL AX, $-1
JNE ok
CMPL DX, $-1
JNE ok
// Get error code from libc.
CALL libc_errno(SB)
MOVL (AX), AX
MOVW AX, (6*4)(BX) // err
ok:
MOVL $0, AX // no error (it's ignored anyway)
MOVL BP, SP
POPL BP
RET
// syscall6 calls a function in libc on behalf of the syscall package.
// syscall6 takes a pointer to a struct like:
// struct {
// fn uintptr
// a1 uintptr
// a2 uintptr
// a3 uintptr
// a4 uintptr
// a5 uintptr
// a6 uintptr
// r1 uintptr
// r2 uintptr
// err uintptr
// }
// syscall6 must be called on the g0 stack with the
// C calling convention (use libcCall).
//
// syscall6 expects a 32-bit result and tests for 32-bit -1
// to decide there was an error.
TEXT runtime·syscall6(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $24, SP
MOVL 32(SP), BX // pointer to args
MOVL (1*4)(BX), AX
MOVL (2*4)(BX), CX
MOVL (3*4)(BX), DX
MOVL AX, (0*4)(SP) // a1
MOVL CX, (1*4)(SP) // a2
MOVL DX, (2*4)(SP) // a3
MOVL (4*4)(BX), AX
MOVL (5*4)(BX), CX
MOVL (6*4)(BX), DX
MOVL AX, (3*4)(SP) // a4
MOVL CX, (4*4)(SP) // a5
MOVL DX, (5*4)(SP) // a6
MOVL (0*4)(BX), AX // fn
CALL AX
MOVL AX, (7*4)(BX) // r1
MOVL DX, (8*4)(BX) // r2
// Standard libc functions return -1 on error and set errno.
CMPL AX, $-1
JNE ok
// Get error code from libc.
CALL libc_errno(SB)
MOVL (AX), AX
MOVW AX, (9*4)(BX) // err
ok:
MOVL $0, AX // no error (it's ignored anyway)
MOVL BP, SP
POPL BP
RET
// syscall6X calls a function in libc on behalf of the syscall package.
// syscall6X takes a pointer to a struct like:
// struct {
// fn uintptr
// a1 uintptr
// a2 uintptr
// a3 uintptr
// a4 uintptr
// a5 uintptr
// a6 uintptr
// r1 uintptr
// r2 uintptr
// err uintptr
// }
// syscall6X must be called on the g0 stack with the
// C calling convention (use libcCall).
//
// syscall6X is like syscall6 but expects a 64-bit result
// and tests for 64-bit -1 to decide there was an error.
TEXT runtime·syscall6X(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $24, SP
MOVL 32(SP), BX // pointer to args
MOVL (1*4)(BX), AX
MOVL (2*4)(BX), CX
MOVL (3*4)(BX), DX
MOVL AX, (0*4)(SP) // a1
MOVL CX, (1*4)(SP) // a2
MOVL DX, (2*4)(SP) // a3
MOVL (4*4)(BX), AX
MOVL (5*4)(BX), CX
MOVL (6*4)(BX), DX
MOVL AX, (3*4)(SP) // a4
MOVL CX, (4*4)(SP) // a5
MOVL DX, (5*4)(SP) // a6
MOVL (0*4)(BX), AX // fn
CALL AX
MOVL AX, (7*4)(BX) // r1
MOVL DX, (8*4)(BX) // r2
// Standard libc functions return -1 on error and set errno.
CMPL AX, $-1
JNE ok
CMPL DX, $-1
JNE ok
// Get error code from libc.
CALL libc_errno(SB)
MOVL (AX), AX
MOVW AX, (9*4)(BX) // err
ok:
MOVL $0, AX // no error (it's ignored anyway)
MOVL BP, SP
POPL BP
RET
// syscall10 calls a function in libc on behalf of the syscall package.
// syscall10 takes a pointer to a struct like:
// struct {
// fn uintptr
// a1 uintptr
// a2 uintptr
// a3 uintptr
// a4 uintptr
// a5 uintptr
// a6 uintptr
// a7 uintptr
// a8 uintptr
// a9 uintptr
// a10 uintptr
// r1 uintptr
// r2 uintptr
// err uintptr
// }
// syscall10 must be called on the g0 stack with the
// C calling convention (use libcCall).
TEXT runtime·syscall10(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $40, SP
MOVL 48(SP), BX // pointer to args
MOVL (1*4)(BX), AX
MOVL (2*4)(BX), CX
MOVL (3*4)(BX), DX
MOVL AX, (0*4)(SP) // a1
MOVL CX, (1*4)(SP) // a2
MOVL DX, (2*4)(SP) // a3
MOVL (4*4)(BX), AX
MOVL (5*4)(BX), CX
MOVL (6*4)(BX), DX
MOVL AX, (3*4)(SP) // a4
MOVL CX, (4*4)(SP) // a5
MOVL DX, (5*4)(SP) // a6
MOVL (7*4)(BX), AX
MOVL (8*4)(BX), CX
MOVL (9*4)(BX), DX
MOVL AX, (6*4)(SP) // a7
MOVL CX, (7*4)(SP) // a8
MOVL DX, (8*4)(SP) // a9
MOVL (10*4)(BX), AX
MOVL AX, (9*4)(SP) // a10
MOVL (0*4)(BX), AX // fn
CALL AX
MOVL AX, (11*4)(BX) // r1
MOVL DX, (12*4)(BX) // r2
// Standard libc functions return -1 on error and set errno.
CMPL AX, $-1
JNE ok
// Get error code from libc.
CALL libc_errno(SB)
MOVL (AX), AX
MOVW AX, (13*4)(BX) // err
ok:
MOVL $0, AX // no error (it's ignored anyway)
MOVL BP, SP
POPL BP
RET
// syscall10X calls a function in libc on behalf of the syscall package.
// syscall10X takes a pointer to a struct like:
// struct {
// fn uintptr
// a1 uintptr
// a2 uintptr
// a3 uintptr
// a4 uintptr
// a5 uintptr
// a6 uintptr
// a7 uintptr
// a8 uintptr
// a9 uintptr
// a10 uintptr
// r1 uintptr
// r2 uintptr
// err uintptr
// }
// syscall10X must be called on the g0 stack with the
// C calling convention (use libcCall).
//
// syscall10X is like syscall9 but expects a 64-bit result
// and tests for 64-bit -1 to decide there was an error.
TEXT runtime·syscall10X(SB),NOSPLIT,$0
PUSHL BP
MOVL SP, BP
SUBL $40, SP
MOVL 48(SP), BX // pointer to args
MOVL (1*4)(BX), AX
MOVL (2*4)(BX), CX
MOVL (3*4)(BX), DX
MOVL AX, (0*4)(SP) // a1
MOVL CX, (1*4)(SP) // a2
MOVL DX, (2*4)(SP) // a3
MOVL (4*4)(BX), AX
MOVL (5*4)(BX), CX
MOVL (6*4)(BX), DX
MOVL AX, (3*4)(SP) // a4
MOVL CX, (4*4)(SP) // a5
MOVL DX, (5*4)(SP) // a6
MOVL (7*4)(BX), AX
MOVL (8*4)(BX), CX
MOVL (9*4)(BX), DX
MOVL AX, (6*4)(SP) // a7
MOVL CX, (7*4)(SP) // a8
MOVL DX, (8*4)(SP) // a9
MOVL (10*4)(BX), AX
MOVL AX, (9*4)(SP) // a10
MOVL (0*4)(BX), AX // fn
CALL AX
MOVL AX, (11*4)(BX) // r1
MOVL DX, (12*4)(BX) // r2
// Standard libc functions return -1 on error and set errno.
CMPL AX, $-1
JNE ok
CMPL DX, $-1
JNE ok
// Get error code from libc.
CALL libc_errno(SB)
MOVL (AX), AX
MOVW AX, (13*4)(BX) // err
ok:
MOVL $0, AX // no error (it's ignored anyway)
MOVL BP, SP
POPL BP
RET
TEXT runtime·issetugid_trampoline(SB),NOSPLIT,$0
PUSHL BP
CALL libc_issetugid(SB)
NOP SP // tell vet SP changed - stop checking offsets
MOVL 8(SP), DX // pointer to return value
MOVL AX, 0(DX)
POPL BP
RET
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