1*0Sstevel@tonic-gate/* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate/* 23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate#pragma ident "%Z%%M% %I% %E% SMI" 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate .file "%M%" 30*0Sstevel@tonic-gate 31*0Sstevel@tonic-gate#include <sys/asm_linkage.h> 32*0Sstevel@tonic-gate 33*0Sstevel@tonic-gate ANSI_PRAGMA_WEAK(syscall,function) 34*0Sstevel@tonic-gate 35*0Sstevel@tonic-gate#include "SYS.h" 36*0Sstevel@tonic-gate 37*0Sstevel@tonic-gate#undef _syscall /* override "synonyms.h" */ 38*0Sstevel@tonic-gate#undef __systemcall 39*0Sstevel@tonic-gate 40*0Sstevel@tonic-gate ENTRY(_syscall) 41*0Sstevel@tonic-gate pushq %rbp 42*0Sstevel@tonic-gate movq %rsp, %rbp 43*0Sstevel@tonic-gate /* construct a new call stack frame */ 44*0Sstevel@tonic-gate movl %edi, %eax /* sysnum */ 45*0Sstevel@tonic-gate movq %rsi, %rdi /* arg0 */ 46*0Sstevel@tonic-gate movq %rdx, %rsi /* arg1 */ 47*0Sstevel@tonic-gate movq %rcx, %rdx /* arg2 */ 48*0Sstevel@tonic-gate movq %r8, %rcx /* arg3 */ 49*0Sstevel@tonic-gate movq %r9, %r8 /* arg4 */ 50*0Sstevel@tonic-gate movq 16(%rbp), %r9 /* arg5 */ 51*0Sstevel@tonic-gate movq 32(%rbp), %r10 52*0Sstevel@tonic-gate pushq %r10 /* arg7 */ 53*0Sstevel@tonic-gate movq 24(%rbp), %r10 54*0Sstevel@tonic-gate pushq %r10 /* arg6 */ 55*0Sstevel@tonic-gate movq 8(%rbp), %r10 56*0Sstevel@tonic-gate pushq %r10 /* return addr */ 57*0Sstevel@tonic-gate /* issue the system call */ 58*0Sstevel@tonic-gate movq %rcx, %r10 59*0Sstevel@tonic-gate syscall 60*0Sstevel@tonic-gate /* restore the stack frame */ 61*0Sstevel@tonic-gate leave 62*0Sstevel@tonic-gate SYSCERROR 63*0Sstevel@tonic-gate ret 64*0Sstevel@tonic-gate SET_SIZE(_syscall) 65*0Sstevel@tonic-gate 66*0Sstevel@tonic-gate/* 67*0Sstevel@tonic-gate * Same as _syscall(), but restricted to 6 syscall arguments 68*0Sstevel@tonic-gate * so it doesn't need to incur the overhead of a new call stack frame. 69*0Sstevel@tonic-gate * Implemented for use only within libc; symbol is not exported. 70*0Sstevel@tonic-gate */ 71*0Sstevel@tonic-gate ENTRY(_syscall6) 72*0Sstevel@tonic-gate movl %edi, %eax /* sysnum */ 73*0Sstevel@tonic-gate movq %rsi, %rdi /* arg0 */ 74*0Sstevel@tonic-gate movq %rdx, %rsi /* arg1 */ 75*0Sstevel@tonic-gate movq %rcx, %rdx /* arg2 */ 76*0Sstevel@tonic-gate movq %r8, %rcx /* arg3 */ 77*0Sstevel@tonic-gate movq %r9, %r8 /* arg4 */ 78*0Sstevel@tonic-gate movq 8(%rsp), %r9 /* arg5 */ 79*0Sstevel@tonic-gate movq %rcx, %r10 80*0Sstevel@tonic-gate syscall 81*0Sstevel@tonic-gate SYSCERROR 82*0Sstevel@tonic-gate ret 83*0Sstevel@tonic-gate SET_SIZE(_syscall6) 84*0Sstevel@tonic-gate 85*0Sstevel@tonic-gate ENTRY(__systemcall) 86*0Sstevel@tonic-gate pushq %rbp 87*0Sstevel@tonic-gate movq %rsp, %rbp 88*0Sstevel@tonic-gate /* construct a new call stack frame */ 89*0Sstevel@tonic-gate pushq %rdi /* sysret_t pointer */ 90*0Sstevel@tonic-gate movl %esi, %eax /* sysnum */ 91*0Sstevel@tonic-gate movq %rdx, %rdi /* arg0 */ 92*0Sstevel@tonic-gate movq %rcx, %rsi /* arg1 */ 93*0Sstevel@tonic-gate movq %r8, %rdx /* arg2 */ 94*0Sstevel@tonic-gate movq %r9, %rcx /* arg3 */ 95*0Sstevel@tonic-gate movq 16(%rbp), %r8 /* arg4 */ 96*0Sstevel@tonic-gate movq 24(%rbp), %r9 /* arg5 */ 97*0Sstevel@tonic-gate movq 40(%rbp), %r10 98*0Sstevel@tonic-gate pushq %r10 /* arg7 */ 99*0Sstevel@tonic-gate movq 32(%rbp), %r10 100*0Sstevel@tonic-gate pushq %r10 /* arg6 */ 101*0Sstevel@tonic-gate movq 8(%rbp), %r10 102*0Sstevel@tonic-gate pushq %r10 /* return addr */ 103*0Sstevel@tonic-gate /* issue the system call */ 104*0Sstevel@tonic-gate movq %rcx, %r10 105*0Sstevel@tonic-gate syscall 106*0Sstevel@tonic-gate movq -8(%rbp), %r10 /* sysret_t pointer */ 107*0Sstevel@tonic-gate jb 1f 108*0Sstevel@tonic-gate movq %rax, 0(%r10) /* no error */ 109*0Sstevel@tonic-gate movq %rdx, 8(%r10) 110*0Sstevel@tonic-gate xorq %rax, %rax 111*0Sstevel@tonic-gate /* restore the stack frame */ 112*0Sstevel@tonic-gate leave 113*0Sstevel@tonic-gate ret 114*0Sstevel@tonic-gate1: 115*0Sstevel@tonic-gate movq $-1, 0(%r10) /* error */ 116*0Sstevel@tonic-gate movq $-1, 8(%r10) 117*0Sstevel@tonic-gate /* restore the stack frame */ 118*0Sstevel@tonic-gate leave 119*0Sstevel@tonic-gate ret 120*0Sstevel@tonic-gate SET_SIZE(__systemcall) 121*0Sstevel@tonic-gate 122*0Sstevel@tonic-gate/* 123*0Sstevel@tonic-gate * Same as __systemcall(), but restricted to 6 syscall arguments 124*0Sstevel@tonic-gate * so it doesn't need to incur the overhead of a new call stack frame. 125*0Sstevel@tonic-gate * Implemented for use only within libc; symbol is not exported. 126*0Sstevel@tonic-gate */ 127*0Sstevel@tonic-gate ENTRY(__systemcall6) 128*0Sstevel@tonic-gate pushq %rdi /* sysret_t pointer */ 129*0Sstevel@tonic-gate movl %esi, %eax /* sysnum */ 130*0Sstevel@tonic-gate movq %rdx, %rdi /* arg0 */ 131*0Sstevel@tonic-gate movq %rcx, %rsi /* arg1 */ 132*0Sstevel@tonic-gate movq %r8, %rdx /* arg2 */ 133*0Sstevel@tonic-gate movq %r9, %rcx /* arg3 */ 134*0Sstevel@tonic-gate movq 16(%rsp), %r8 /* arg4 */ 135*0Sstevel@tonic-gate movq 24(%rsp), %r9 /* arg5 */ 136*0Sstevel@tonic-gate /* issue the system call */ 137*0Sstevel@tonic-gate movq %rcx, %r10 138*0Sstevel@tonic-gate syscall 139*0Sstevel@tonic-gate popq %r10 /* sysret_t pointer */ 140*0Sstevel@tonic-gate jb 1f 141*0Sstevel@tonic-gate movq %rax, 0(%r10) /* no error */ 142*0Sstevel@tonic-gate movq %rdx, 8(%r10) 143*0Sstevel@tonic-gate xorq %rax, %rax 144*0Sstevel@tonic-gate ret 145*0Sstevel@tonic-gate1: 146*0Sstevel@tonic-gate movq $-1, 0(%r10) /* error */ 147*0Sstevel@tonic-gate movq $-1, 8(%r10) 148*0Sstevel@tonic-gate ret 149*0Sstevel@tonic-gate SET_SIZE(__systemcall6) 150