17c478bd9Sstevel@tonic-gate/* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 57257d1b4Sraf * Common Development and Distribution License (the "License"). 67257d1b4Sraf * You may not use this file except in compliance with the License. 77c478bd9Sstevel@tonic-gate * 87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 117c478bd9Sstevel@tonic-gate * and limitations under the License. 127c478bd9Sstevel@tonic-gate * 137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 187c478bd9Sstevel@tonic-gate * 197c478bd9Sstevel@tonic-gate * CDDL HEADER END 207c478bd9Sstevel@tonic-gate */ 217257d1b4Sraf 227c478bd9Sstevel@tonic-gate/* 237257d1b4Sraf * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 247c478bd9Sstevel@tonic-gate * Use is subject to license terms. 257c478bd9Sstevel@tonic-gate */ 267c478bd9Sstevel@tonic-gate 27*9a70fc3bSMark J. Nelson .file "syscall.s" 287c478bd9Sstevel@tonic-gate 297257d1b4Sraf#include "SYS.h" 307c478bd9Sstevel@tonic-gate 317c478bd9Sstevel@tonic-gate ANSI_PRAGMA_WEAK(syscall,function) 327c478bd9Sstevel@tonic-gate 337257d1b4Sraf ENTRY(syscall) 347c478bd9Sstevel@tonic-gate pushq %rbp 357c478bd9Sstevel@tonic-gate movq %rsp, %rbp 367c478bd9Sstevel@tonic-gate /* construct a new call stack frame */ 377c478bd9Sstevel@tonic-gate movl %edi, %eax /* sysnum */ 387c478bd9Sstevel@tonic-gate movq %rsi, %rdi /* arg0 */ 397c478bd9Sstevel@tonic-gate movq %rdx, %rsi /* arg1 */ 407c478bd9Sstevel@tonic-gate movq %rcx, %rdx /* arg2 */ 417c478bd9Sstevel@tonic-gate movq %r8, %rcx /* arg3 */ 427c478bd9Sstevel@tonic-gate movq %r9, %r8 /* arg4 */ 437c478bd9Sstevel@tonic-gate movq 16(%rbp), %r9 /* arg5 */ 447c478bd9Sstevel@tonic-gate movq 32(%rbp), %r10 457c478bd9Sstevel@tonic-gate pushq %r10 /* arg7 */ 467c478bd9Sstevel@tonic-gate movq 24(%rbp), %r10 477c478bd9Sstevel@tonic-gate pushq %r10 /* arg6 */ 487c478bd9Sstevel@tonic-gate movq 8(%rbp), %r10 497c478bd9Sstevel@tonic-gate pushq %r10 /* return addr */ 507c478bd9Sstevel@tonic-gate /* issue the system call */ 517c478bd9Sstevel@tonic-gate movq %rcx, %r10 527c478bd9Sstevel@tonic-gate syscall 537c478bd9Sstevel@tonic-gate /* restore the stack frame */ 547c478bd9Sstevel@tonic-gate leave 557c478bd9Sstevel@tonic-gate SYSCERROR 567c478bd9Sstevel@tonic-gate ret 577257d1b4Sraf SET_SIZE(syscall) 587c478bd9Sstevel@tonic-gate 597c478bd9Sstevel@tonic-gate/* 607c478bd9Sstevel@tonic-gate * Same as _syscall(), but restricted to 6 syscall arguments 617c478bd9Sstevel@tonic-gate * so it doesn't need to incur the overhead of a new call stack frame. 627c478bd9Sstevel@tonic-gate * Implemented for use only within libc; symbol is not exported. 637c478bd9Sstevel@tonic-gate */ 647c478bd9Sstevel@tonic-gate ENTRY(_syscall6) 657c478bd9Sstevel@tonic-gate movl %edi, %eax /* sysnum */ 667c478bd9Sstevel@tonic-gate movq %rsi, %rdi /* arg0 */ 677c478bd9Sstevel@tonic-gate movq %rdx, %rsi /* arg1 */ 687c478bd9Sstevel@tonic-gate movq %rcx, %rdx /* arg2 */ 697c478bd9Sstevel@tonic-gate movq %r8, %rcx /* arg3 */ 707c478bd9Sstevel@tonic-gate movq %r9, %r8 /* arg4 */ 717c478bd9Sstevel@tonic-gate movq 8(%rsp), %r9 /* arg5 */ 727c478bd9Sstevel@tonic-gate movq %rcx, %r10 737c478bd9Sstevel@tonic-gate syscall 747c478bd9Sstevel@tonic-gate SYSCERROR 757c478bd9Sstevel@tonic-gate ret 767c478bd9Sstevel@tonic-gate SET_SIZE(_syscall6) 777c478bd9Sstevel@tonic-gate 787c478bd9Sstevel@tonic-gate ENTRY(__systemcall) 797c478bd9Sstevel@tonic-gate pushq %rbp 807c478bd9Sstevel@tonic-gate movq %rsp, %rbp 817c478bd9Sstevel@tonic-gate /* construct a new call stack frame */ 827c478bd9Sstevel@tonic-gate pushq %rdi /* sysret_t pointer */ 837c478bd9Sstevel@tonic-gate movl %esi, %eax /* sysnum */ 847c478bd9Sstevel@tonic-gate movq %rdx, %rdi /* arg0 */ 857c478bd9Sstevel@tonic-gate movq %rcx, %rsi /* arg1 */ 867c478bd9Sstevel@tonic-gate movq %r8, %rdx /* arg2 */ 877c478bd9Sstevel@tonic-gate movq %r9, %rcx /* arg3 */ 887c478bd9Sstevel@tonic-gate movq 16(%rbp), %r8 /* arg4 */ 897c478bd9Sstevel@tonic-gate movq 24(%rbp), %r9 /* arg5 */ 907c478bd9Sstevel@tonic-gate movq 40(%rbp), %r10 917c478bd9Sstevel@tonic-gate pushq %r10 /* arg7 */ 927c478bd9Sstevel@tonic-gate movq 32(%rbp), %r10 937c478bd9Sstevel@tonic-gate pushq %r10 /* arg6 */ 947c478bd9Sstevel@tonic-gate movq 8(%rbp), %r10 957c478bd9Sstevel@tonic-gate pushq %r10 /* return addr */ 967c478bd9Sstevel@tonic-gate /* issue the system call */ 977c478bd9Sstevel@tonic-gate movq %rcx, %r10 987c478bd9Sstevel@tonic-gate syscall 997c478bd9Sstevel@tonic-gate movq -8(%rbp), %r10 /* sysret_t pointer */ 1007c478bd9Sstevel@tonic-gate jb 1f 1017c478bd9Sstevel@tonic-gate movq %rax, 0(%r10) /* no error */ 1027c478bd9Sstevel@tonic-gate movq %rdx, 8(%r10) 1037c478bd9Sstevel@tonic-gate xorq %rax, %rax 1047c478bd9Sstevel@tonic-gate /* restore the stack frame */ 1057c478bd9Sstevel@tonic-gate leave 1067c478bd9Sstevel@tonic-gate ret 1077c478bd9Sstevel@tonic-gate1: 1087c478bd9Sstevel@tonic-gate movq $-1, 0(%r10) /* error */ 1097c478bd9Sstevel@tonic-gate movq $-1, 8(%r10) 1107c478bd9Sstevel@tonic-gate /* restore the stack frame */ 1117c478bd9Sstevel@tonic-gate leave 1127c478bd9Sstevel@tonic-gate ret 1137c478bd9Sstevel@tonic-gate SET_SIZE(__systemcall) 1147c478bd9Sstevel@tonic-gate 1157c478bd9Sstevel@tonic-gate/* 1167c478bd9Sstevel@tonic-gate * Same as __systemcall(), but restricted to 6 syscall arguments 1177c478bd9Sstevel@tonic-gate * so it doesn't need to incur the overhead of a new call stack frame. 1187c478bd9Sstevel@tonic-gate * Implemented for use only within libc; symbol is not exported. 1197c478bd9Sstevel@tonic-gate */ 1207c478bd9Sstevel@tonic-gate ENTRY(__systemcall6) 1217c478bd9Sstevel@tonic-gate pushq %rdi /* sysret_t pointer */ 1227c478bd9Sstevel@tonic-gate movl %esi, %eax /* sysnum */ 1237c478bd9Sstevel@tonic-gate movq %rdx, %rdi /* arg0 */ 1247c478bd9Sstevel@tonic-gate movq %rcx, %rsi /* arg1 */ 1257c478bd9Sstevel@tonic-gate movq %r8, %rdx /* arg2 */ 1267c478bd9Sstevel@tonic-gate movq %r9, %rcx /* arg3 */ 1277c478bd9Sstevel@tonic-gate movq 16(%rsp), %r8 /* arg4 */ 1287c478bd9Sstevel@tonic-gate movq 24(%rsp), %r9 /* arg5 */ 1297c478bd9Sstevel@tonic-gate /* issue the system call */ 1307c478bd9Sstevel@tonic-gate movq %rcx, %r10 1317c478bd9Sstevel@tonic-gate syscall 1327c478bd9Sstevel@tonic-gate popq %r10 /* sysret_t pointer */ 1337c478bd9Sstevel@tonic-gate jb 1f 1347c478bd9Sstevel@tonic-gate movq %rax, 0(%r10) /* no error */ 1357c478bd9Sstevel@tonic-gate movq %rdx, 8(%r10) 1367c478bd9Sstevel@tonic-gate xorq %rax, %rax 1377c478bd9Sstevel@tonic-gate ret 1387c478bd9Sstevel@tonic-gate1: 1397c478bd9Sstevel@tonic-gate movq $-1, 0(%r10) /* error */ 1407c478bd9Sstevel@tonic-gate movq $-1, 8(%r10) 1417c478bd9Sstevel@tonic-gate ret 1427c478bd9Sstevel@tonic-gate SET_SIZE(__systemcall6) 143