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 2005 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 #ifndef _LIBC_I386_INC_SYS_H 28*0Sstevel@tonic-gate #define _LIBC_I386_INC_SYS_H 29*0Sstevel@tonic-gate 30*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 31*0Sstevel@tonic-gate 32*0Sstevel@tonic-gate /* 33*0Sstevel@tonic-gate * This file defines common code sequences for system calls. 34*0Sstevel@tonic-gate */ 35*0Sstevel@tonic-gate #include <sys/asm_linkage.h> 36*0Sstevel@tonic-gate #include <sys/syscall.h> 37*0Sstevel@tonic-gate #include <sys/trap.h> 38*0Sstevel@tonic-gate #include <sys/errno.h> 39*0Sstevel@tonic-gate #include "synonyms.h" 40*0Sstevel@tonic-gate 41*0Sstevel@tonic-gate #define _prologue_ \ 42*0Sstevel@tonic-gate pushl %ebx; \ 43*0Sstevel@tonic-gate call 9f; \ 44*0Sstevel@tonic-gate 9: \ 45*0Sstevel@tonic-gate popl %ebx; \ 46*0Sstevel@tonic-gate addl $_GLOBAL_OFFSET_TABLE_ + [. - 9b], %ebx 47*0Sstevel@tonic-gate 48*0Sstevel@tonic-gate #define _epilogue_ \ 49*0Sstevel@tonic-gate popl %ebx 50*0Sstevel@tonic-gate 51*0Sstevel@tonic-gate #define _fref_(name) name@PLT 52*0Sstevel@tonic-gate #define _daref_(name) name@GOT(%ebx) 53*0Sstevel@tonic-gate #define _sref_(name) name@GOTOFF(%ebx) 54*0Sstevel@tonic-gate #define _esp_(offset) offset+4(%esp) /* add 4 for the saved %ebx */ 55*0Sstevel@tonic-gate 56*0Sstevel@tonic-gate /* 57*0Sstevel@tonic-gate * Define the external symbols __cerror and __cerror64 for all files. 58*0Sstevel@tonic-gate */ 59*0Sstevel@tonic-gate .globl __cerror 60*0Sstevel@tonic-gate .globl __cerror64 61*0Sstevel@tonic-gate 62*0Sstevel@tonic-gate /* 63*0Sstevel@tonic-gate * __SYSCALLINT provides the basic trap sequence. It assumes that an entry 64*0Sstevel@tonic-gate * of the form SYS_name exists (probably from sys/syscall.h). 65*0Sstevel@tonic-gate */ 66*0Sstevel@tonic-gate 67*0Sstevel@tonic-gate #define __SYSCALLINT(name) \ 68*0Sstevel@tonic-gate /* CSTYLED */ \ 69*0Sstevel@tonic-gate movl $SYS_/**/name, %eax; \ 70*0Sstevel@tonic-gate int $T_SYSCALLINT 71*0Sstevel@tonic-gate 72*0Sstevel@tonic-gate /* 73*0Sstevel@tonic-gate * __SYSENTER provides a faster variant that is only able to 74*0Sstevel@tonic-gate * return rval1. Note that %ecx and %edx are ALWAYS smashed. 75*0Sstevel@tonic-gate */ 76*0Sstevel@tonic-gate #define __SYSENTER(name) \ 77*0Sstevel@tonic-gate call 8f; \ 78*0Sstevel@tonic-gate 8: popl %edx; \ 79*0Sstevel@tonic-gate /* CSTYLED */ \ 80*0Sstevel@tonic-gate movl $SYS_/**/name, %eax; \ 81*0Sstevel@tonic-gate movl %esp, %ecx; \ 82*0Sstevel@tonic-gate add $[9f - 8b], %edx; \ 83*0Sstevel@tonic-gate sysenter; \ 84*0Sstevel@tonic-gate 9: 85*0Sstevel@tonic-gate 86*0Sstevel@tonic-gate /* 87*0Sstevel@tonic-gate * __SYSCALL provides a faster variant on processors and kernels 88*0Sstevel@tonic-gate * that support it. Note that %ecx is ALWAYS smashed. 89*0Sstevel@tonic-gate */ 90*0Sstevel@tonic-gate #define __SYSCALL(name) \ 91*0Sstevel@tonic-gate /* CSTYLED */ \ 92*0Sstevel@tonic-gate movl $SYS_/**/name, %eax; \ 93*0Sstevel@tonic-gate .byte 0xf, 0x5 /* syscall */ 94*0Sstevel@tonic-gate 95*0Sstevel@tonic-gate #if defined(_SYSC_INSN) 96*0Sstevel@tonic-gate #define SYSTRAP_RVAL1(name) __SYSCALL(name) 97*0Sstevel@tonic-gate #define SYSTRAP_RVAL2(name) __SYSCALL(name) 98*0Sstevel@tonic-gate #define SYSTRAP_2RVALS(name) __SYSCALL(name) 99*0Sstevel@tonic-gate #define SYSTRAP_64RVAL(name) __SYSCALL(name) 100*0Sstevel@tonic-gate #else /* _SYSC_INSN */ 101*0Sstevel@tonic-gate #if defined(_SEP_INSN) 102*0Sstevel@tonic-gate #define SYSTRAP_RVAL1(name) __SYSENTER(name) 103*0Sstevel@tonic-gate #else /* _SEP_INSN */ 104*0Sstevel@tonic-gate #define SYSTRAP_RVAL1(name) __SYSCALLINT(name) 105*0Sstevel@tonic-gate #endif /* _SEP_INSN */ 106*0Sstevel@tonic-gate #define SYSTRAP_RVAL2(name) __SYSCALLINT(name) 107*0Sstevel@tonic-gate #define SYSTRAP_2RVALS(name) __SYSCALLINT(name) 108*0Sstevel@tonic-gate #define SYSTRAP_64RVAL(name) __SYSCALLINT(name) 109*0Sstevel@tonic-gate #endif /* _SYSC_INSN */ 110*0Sstevel@tonic-gate 111*0Sstevel@tonic-gate /* 112*0Sstevel@tonic-gate * SYSFASTTRAP provides the fast system call trap sequence. It assumes 113*0Sstevel@tonic-gate * that an entry of the form T_name exists (probably from sys/trap.h). 114*0Sstevel@tonic-gate */ 115*0Sstevel@tonic-gate #define SYSFASTTRAP(name) \ 116*0Sstevel@tonic-gate /* CSTYLED */ \ 117*0Sstevel@tonic-gate movl $T_/**/name, %eax; \ 118*0Sstevel@tonic-gate int $T_FASTTRAP 119*0Sstevel@tonic-gate 120*0Sstevel@tonic-gate /* 121*0Sstevel@tonic-gate * SYSCERROR provides the sequence to branch to __cerror if an error is 122*0Sstevel@tonic-gate * indicated by the carry-bit being set upon return from a trap. 123*0Sstevel@tonic-gate */ 124*0Sstevel@tonic-gate #define SYSCERROR \ 125*0Sstevel@tonic-gate jb __cerror 126*0Sstevel@tonic-gate 127*0Sstevel@tonic-gate /* 128*0Sstevel@tonic-gate * SYSCERROR64 provides the sequence to branch to __cerror64 if an error is 129*0Sstevel@tonic-gate * indicated by the carry-bit being set upon return from a trap. 130*0Sstevel@tonic-gate */ 131*0Sstevel@tonic-gate #define SYSCERROR64 \ 132*0Sstevel@tonic-gate jb __cerror64 133*0Sstevel@tonic-gate 134*0Sstevel@tonic-gate /* 135*0Sstevel@tonic-gate * SYSLWPERR provides the sequence to return 0 on a successful trap 136*0Sstevel@tonic-gate * and the error code if unsuccessful. 137*0Sstevel@tonic-gate * Error is indicated by the carry-bit being set upon return from a trap. 138*0Sstevel@tonic-gate */ 139*0Sstevel@tonic-gate #define SYSLWPERR \ 140*0Sstevel@tonic-gate jae 1f; \ 141*0Sstevel@tonic-gate cmpl $ERESTART, %eax; \ 142*0Sstevel@tonic-gate jne 2f; \ 143*0Sstevel@tonic-gate movl $EINTR, %eax; \ 144*0Sstevel@tonic-gate jmp 2f; \ 145*0Sstevel@tonic-gate 1: \ 146*0Sstevel@tonic-gate xorl %eax, %eax; \ 147*0Sstevel@tonic-gate 2: 148*0Sstevel@tonic-gate 149*0Sstevel@tonic-gate /* 150*0Sstevel@tonic-gate * SYSREENTRY provides the entry sequence for restartable system calls. 151*0Sstevel@tonic-gate */ 152*0Sstevel@tonic-gate #define SYSREENTRY(name) \ 153*0Sstevel@tonic-gate /* CSTYLED */ \ 154*0Sstevel@tonic-gate .restart_/**/name: \ 155*0Sstevel@tonic-gate ENTRY(name) 156*0Sstevel@tonic-gate 157*0Sstevel@tonic-gate /* 158*0Sstevel@tonic-gate * SYSRESTART provides the error handling sequence for restartable 159*0Sstevel@tonic-gate * system calls. 160*0Sstevel@tonic-gate */ 161*0Sstevel@tonic-gate #define SYSRESTART(name) \ 162*0Sstevel@tonic-gate jae 1f; \ 163*0Sstevel@tonic-gate cmpl $ERESTART, %eax; \ 164*0Sstevel@tonic-gate je name; \ 165*0Sstevel@tonic-gate jmp __cerror; \ 166*0Sstevel@tonic-gate 1: 167*0Sstevel@tonic-gate 168*0Sstevel@tonic-gate /* 169*0Sstevel@tonic-gate * SYSINTR_RESTART provides the error handling sequence for restartable 170*0Sstevel@tonic-gate * system calls in case of EINTR or ERESTART. 171*0Sstevel@tonic-gate */ 172*0Sstevel@tonic-gate #define SYSINTR_RESTART(name) \ 173*0Sstevel@tonic-gate jae 1f; \ 174*0Sstevel@tonic-gate cmpl $ERESTART, %eax; \ 175*0Sstevel@tonic-gate je name; \ 176*0Sstevel@tonic-gate cmpl $EINTR, %eax; \ 177*0Sstevel@tonic-gate je name; \ 178*0Sstevel@tonic-gate jmp 2f; \ 179*0Sstevel@tonic-gate 1: \ 180*0Sstevel@tonic-gate xorl %eax, %eax; \ 181*0Sstevel@tonic-gate 2: 182*0Sstevel@tonic-gate 183*0Sstevel@tonic-gate /* 184*0Sstevel@tonic-gate * SYSCALL provides the standard (i.e.: most common) system call sequence. 185*0Sstevel@tonic-gate */ 186*0Sstevel@tonic-gate #define SYSCALL(name) \ 187*0Sstevel@tonic-gate ENTRY(name); \ 188*0Sstevel@tonic-gate SYSTRAP_2RVALS(name); \ 189*0Sstevel@tonic-gate SYSCERROR 190*0Sstevel@tonic-gate 191*0Sstevel@tonic-gate #define SYSCALL_RVAL1(name) \ 192*0Sstevel@tonic-gate ENTRY(name); \ 193*0Sstevel@tonic-gate SYSTRAP_RVAL1(name); \ 194*0Sstevel@tonic-gate SYSCERROR 195*0Sstevel@tonic-gate 196*0Sstevel@tonic-gate /* 197*0Sstevel@tonic-gate * SYSCALL64 provides the standard (i.e.: most common) system call sequence 198*0Sstevel@tonic-gate * for system calls that return 64-bit values. 199*0Sstevel@tonic-gate */ 200*0Sstevel@tonic-gate #define SYSCALL64(name) \ 201*0Sstevel@tonic-gate ENTRY(name); \ 202*0Sstevel@tonic-gate SYSTRAP_64RVAL(name); \ 203*0Sstevel@tonic-gate SYSCERROR64 204*0Sstevel@tonic-gate 205*0Sstevel@tonic-gate /* 206*0Sstevel@tonic-gate * SYSCALL_RESTART provides the most common restartable system call sequence. 207*0Sstevel@tonic-gate */ 208*0Sstevel@tonic-gate #define SYSCALL_RESTART(name) \ 209*0Sstevel@tonic-gate SYSREENTRY(name); \ 210*0Sstevel@tonic-gate SYSTRAP_2RVALS(name); \ 211*0Sstevel@tonic-gate /* CSTYLED */ \ 212*0Sstevel@tonic-gate SYSRESTART(.restart_/**/name) 213*0Sstevel@tonic-gate 214*0Sstevel@tonic-gate #define SYSCALL_RESTART_RVAL1(name) \ 215*0Sstevel@tonic-gate SYSREENTRY(name); \ 216*0Sstevel@tonic-gate SYSTRAP_RVAL1(name); \ 217*0Sstevel@tonic-gate /* CSTYLED */ \ 218*0Sstevel@tonic-gate SYSRESTART(.restart_/**/name) 219*0Sstevel@tonic-gate 220*0Sstevel@tonic-gate /* 221*0Sstevel@tonic-gate * SYSCALL2 provides a common system call sequence when the entry name 222*0Sstevel@tonic-gate * is different than the trap name. 223*0Sstevel@tonic-gate */ 224*0Sstevel@tonic-gate #define SYSCALL2(entryname, trapname) \ 225*0Sstevel@tonic-gate ENTRY(entryname); \ 226*0Sstevel@tonic-gate SYSTRAP_2RVALS(trapname); \ 227*0Sstevel@tonic-gate SYSCERROR 228*0Sstevel@tonic-gate 229*0Sstevel@tonic-gate #define SYSCALL2_RVAL1(entryname, trapname) \ 230*0Sstevel@tonic-gate ENTRY(entryname); \ 231*0Sstevel@tonic-gate SYSTRAP_RVAL1(trapname); \ 232*0Sstevel@tonic-gate SYSCERROR 233*0Sstevel@tonic-gate 234*0Sstevel@tonic-gate /* 235*0Sstevel@tonic-gate * SYSCALL2_RESTART provides a common restartable system call sequence when the 236*0Sstevel@tonic-gate * entry name is different than the trap name. 237*0Sstevel@tonic-gate */ 238*0Sstevel@tonic-gate #define SYSCALL2_RESTART(entryname, trapname) \ 239*0Sstevel@tonic-gate SYSREENTRY(entryname); \ 240*0Sstevel@tonic-gate SYSTRAP_2RVALS(trapname); \ 241*0Sstevel@tonic-gate /* CSTYLED */ \ 242*0Sstevel@tonic-gate SYSRESTART(.restart_/**/entryname) 243*0Sstevel@tonic-gate 244*0Sstevel@tonic-gate #define SYSCALL2_RESTART_RVAL1(entryname, trapname) \ 245*0Sstevel@tonic-gate SYSREENTRY(entryname); \ 246*0Sstevel@tonic-gate SYSTRAP_RVAL1(trapname); \ 247*0Sstevel@tonic-gate /* CSTYLED */ \ 248*0Sstevel@tonic-gate SYSRESTART(.restart_/**/entryname) 249*0Sstevel@tonic-gate 250*0Sstevel@tonic-gate /* 251*0Sstevel@tonic-gate * SYSCALL_NOERROR provides the most common system call sequence for those 252*0Sstevel@tonic-gate * system calls which don't check the error return (carry bit). 253*0Sstevel@tonic-gate */ 254*0Sstevel@tonic-gate #define SYSCALL_NOERROR(name) \ 255*0Sstevel@tonic-gate ENTRY(name); \ 256*0Sstevel@tonic-gate SYSTRAP_2RVALS(name) 257*0Sstevel@tonic-gate 258*0Sstevel@tonic-gate #define SYSCALL_NOERROR_RVAL1(name) \ 259*0Sstevel@tonic-gate ENTRY(name); \ 260*0Sstevel@tonic-gate SYSTRAP_RVAL1(name) 261*0Sstevel@tonic-gate 262*0Sstevel@tonic-gate /* 263*0Sstevel@tonic-gate * Standard syscall return sequence, return code equal to rval1. 264*0Sstevel@tonic-gate */ 265*0Sstevel@tonic-gate #define RET \ 266*0Sstevel@tonic-gate ret 267*0Sstevel@tonic-gate 268*0Sstevel@tonic-gate /* 269*0Sstevel@tonic-gate * Syscall return sequence, return code equal to rval2. 270*0Sstevel@tonic-gate */ 271*0Sstevel@tonic-gate #define RET2 \ 272*0Sstevel@tonic-gate movl %edx, %eax; \ 273*0Sstevel@tonic-gate ret 274*0Sstevel@tonic-gate 275*0Sstevel@tonic-gate /* 276*0Sstevel@tonic-gate * Syscall return sequence with return code forced to zero. 277*0Sstevel@tonic-gate */ 278*0Sstevel@tonic-gate #define RETC \ 279*0Sstevel@tonic-gate xorl %eax, %eax; \ 280*0Sstevel@tonic-gate ret 281*0Sstevel@tonic-gate 282*0Sstevel@tonic-gate #endif /* _LIBC_I386_INC_SYS_H */ 283