diff options
Diffstat (limited to 'ports/sysdeps/unix/sysv/linux/m68k/socket.S')
| -rw-r--r-- | ports/sysdeps/unix/sysv/linux/m68k/socket.S | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/ports/sysdeps/unix/sysv/linux/m68k/socket.S b/ports/sysdeps/unix/sysv/linux/m68k/socket.S new file mode 100644 index 0000000000..53aafec820 --- /dev/null +++ b/ports/sysdeps/unix/sysv/linux/m68k/socket.S @@ -0,0 +1,122 @@ +/* Copyright (C) 1996, 1997, 1998, 2010, 2012 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, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep-cancel.h> +#include <socketcall.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. + 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) +#ifdef NEED_CANCELLATION +# if !defined CENABLE || !defined CDISABLE +# error CENABLE and/or CDISABLE is not defined +# endif + SINGLE_THREAD_P + jne 1f +#endif + + /* Save registers. */ + move.l %d2, %a0 + cfi_register (%d2, %a0) + + move.l #SYS_ify (socketcall), %d0 /* System call number in %d0. */ + + /* Use ## so `socket' is a separate token that might be #define'd. */ + move.l #P (SOCKOP_,socket), %d1 /* Subcode is first arg to syscall. */ + lea 4(%sp), %a1 /* Address of args is 2nd arg. */ + move.l %a1, %d2 + + /* Do the system call trap. */ + trap #0 + + /* Restore registers. */ + move.l %a0, %d2 + cfi_restore (%d2) + + /* %d0 is < 0 if there was an error. */ + tst.l %d0 + jmi SYSCALL_ERROR_LABEL + + /* Successful; return the syscall's value. */ + rts + +#ifdef NEED_CANCELLATION +1: /* Enable asynchronous cancellation. */ + CENABLE + + /* Save D2. */ + move.l %d2, -(%sp) + cfi_adjust_cfa_offset (4) + cfi_rel_offset (%d2, 0) + + /* Save the result of CENABLE. */ + move.l %d0, -(%sp) + cfi_adjust_cfa_offset (4) + + /* Use ## so `socket' is a separate token that might be #define'd. */ + move.l #P (SOCKOP_,socket), %d1 /* Subcode is first arg to syscall. */ + lea 4+8(%sp), %a1 /* Address of args is 2nd arg. */ + move.l %a1, %d2 + + move.l #SYS_ify (socketcall), %d0 /* System call number in %d0. */ + /* Do the system call trap. */ + trap #0 + + /* Restore cancellation. */ + move.l %d0, %d2 + CDISABLE + addq.l #4, %sp + cfi_adjust_cfa_offset (-4) + move.l %d2, %d0 + + /* Restore registers. */ + move.l (%sp)+, %d2 + cfi_adjust_cfa_offset (-4) + cfi_restore (%d2) + + /* %d0 is < 0 if there was an error. */ + tst.l %d0 + jmi SYSCALL_ERROR_LABEL + + /* Successful; return the syscall's value. */ + rts +#endif + +PSEUDO_END (__socket) + +#ifndef NO_WEAK_ALIAS +weak_alias (__socket, socket) +#endif |