| /* Copyright (C) 1995-1998,2002,2003,2005,2008 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #include <sysdep-cancel.h> |
| #include <socketcall.h> |
| #include <tls.h> |
| |
| #define P(a, b) P2(a, b) |
| #define P2(a, b) a##b |
| |
| .text |
| /* The socket-oriented system calls are handled unusally in Linux/i386. |
| They are all gated through the single `socketcall' system call number. |
| `socketcall' takes two arguments: the first is the subcode, specifying |
| which socket function is being called; and the second is a pointer to |
| the arguments to the specific function. |
| |
| The .S files for the other calls just #define socket and #include this. */ |
| |
| #ifndef __socket |
| # ifndef NO_WEAK_ALIAS |
| # define __socket P(__,socket) |
| # else |
| # define __socket socket |
| # endif |
| #endif |
| |
| .globl __socket |
| ENTRY (__socket) |
| #if defined NEED_CANCELLATION && defined CENABLE |
| SINGLE_THREAD_P |
| jne 1f |
| #endif |
| |
| /* Save registers. */ |
| movl %ebx, %edx |
| cfi_register (3, 2) |
| |
| movl $SYS_ify(socketcall), %eax /* System call number in %eax. */ |
| |
| /* Use ## so `socket' is a separate token that might be #define'd. */ |
| movl $P(SOCKOP_,socket), %ebx /* Subcode is first arg to syscall. */ |
| lea 4(%esp), %ecx /* Address of args is 2nd arg. */ |
| |
| /* Do the system call trap. */ |
| ENTER_KERNEL |
| |
| /* Restore registers. */ |
| movl %edx, %ebx |
| cfi_restore (3) |
| |
| /* %eax is < 0 if there was an error. */ |
| cmpl $-125, %eax |
| jae SYSCALL_ERROR_LABEL |
| |
| /* Successful; return the syscall's value. */ |
| L(pseudo_end): |
| ret |
| |
| |
| #if defined NEED_CANCELLATION && defined CENABLE |
| /* We need one more register. */ |
| 1: pushl %esi |
| cfi_adjust_cfa_offset(4) |
| |
| /* Enable asynchronous cancellation. */ |
| CENABLE |
| movl %eax, %esi |
| cfi_offset(6, -8) /* %esi */ |
| |
| /* Save registers. */ |
| movl %ebx, %edx |
| cfi_register (3, 2) |
| |
| movl $SYS_ify(socketcall), %eax /* System call number in %eax. */ |
| |
| /* Use ## so `socket' is a separate token that might be #define'd. */ |
| movl $P(SOCKOP_,socket), %ebx /* Subcode is first arg to syscall. */ |
| lea 8(%esp), %ecx /* Address of args is 2nd arg. */ |
| |
| /* Do the system call trap. */ |
| ENTER_KERNEL |
| |
| /* Restore registers. */ |
| movl %edx, %ebx |
| cfi_restore (3) |
| |
| /* Restore the cancellation. */ |
| xchgl %esi, %eax |
| CDISABLE |
| |
| /* Restore registers. */ |
| movl %esi, %eax |
| popl %esi |
| cfi_restore (6) |
| cfi_adjust_cfa_offset(-4) |
| |
| /* %eax is < 0 if there was an error. */ |
| cmpl $-125, %eax |
| jae SYSCALL_ERROR_LABEL |
| |
| /* Successful; return the syscall's value. */ |
| ret |
| #endif |
| PSEUDO_END (__socket) |
| |
| #ifndef NO_WEAK_ALIAS |
| weak_alias (__socket, socket) |
| #endif |
