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/* Copyright (C) 1999-2013 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>
#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.
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
#define PUSHARGS_1 mov.l r4,@-r15; \
cfi_adjust_cfa_offset (4); \
cfi_rel_offset (r4, 0)
#define PUSHARGS_2 mov.l r5,@-r15; \
cfi_adjust_cfa_offset (4); \
cfi_rel_offset (r5, 0); \
PUSHARGS_1
#define PUSHARGS_3 mov.l r6,@-r15; \
cfi_adjust_cfa_offset (4); \
cfi_rel_offset (r6, 0); \
PUSHARGS_2
#define PUSHARGS_4 mov.l r7,@-r15; \
cfi_adjust_cfa_offset (4); \
cfi_rel_offset (r7, 0); \
PUSHARGS_3
#define PUSHARGS_5 PUSHARGS_4 /* Caller has already pushed arg 5 */
#define PUSHARGS_6 PUSHARGS_4 /* Caller has already pushed arg 5,6 */
#define POPARGS_1 add #4,r15; cfi_adjust_cfa_offset (-4)
#define POPARGS_2 add #8,r15; cfi_adjust_cfa_offset (-8)
#define POPARGS_3 add #12,r15; cfi_adjust_cfa_offset (-12)
#define POPARGS_4 add #16,r15; cfi_adjust_cfa_offset (-16)
#define POPARGS_5 POPARGS_4
#define POPARGS_6 POPARGS_4
#define ADJUSTCFI_1 cfi_adjust_cfa_offset (4); \
cfi_offset (r4, -4)
#define ADJUSTCFI_2 cfi_adjust_cfa_offset (8); \
cfi_offset (r4, -4); \
cfi_offset (r5, -8)
#define ADJUSTCFI_3 cfi_adjust_cfa_offset (12); \
cfi_offset (r4, -4); \
cfi_offset (r5, -8); \
cfi_offset (r6, -12)
#define ADJUSTCFI_4 cfi_adjust_cfa_offset (16); \
cfi_offset (r4, -4); \
cfi_offset (r5, -8); \
cfi_offset (r6, -12); \
cfi_offset (r7, -16)
#define ADJUSTCFI_5 ADJUSTCFI_4
#define ADJUSTCFI_6 ADJUSTCFI_4
#ifndef NARGS
/* If we were called with no wrapper, this is really socket(). */
#define NARGS 3
#endif
.globl __socket
ENTRY (__socket)
/* This will not work in the case of a socket call being interrupted
by a signal. If the signal handler uses any stack the arguments
to socket will be trashed. The results of a restart of any
socket call are then unpredictable. */
/* Push args onto the stack. */
P(PUSHARGS_,NARGS)
#if defined NEED_CANCELLATION && defined CENABLE
SINGLE_THREAD_P
bf .Lsocket_cancel
#endif
/* Do the system call trap. */
mov #+P(SOCKOP_,socket), r4
mov r15, r5
mov.l .L1,r3
trapa #0x12
/* Pop args off the stack */
P(POPARGS_,NARGS)
mov r0, r1
mov #-12, r2
shad r2, r1
not r1, r1 // r1=0 means r0 = -1 to -4095
tst r1, r1 // i.e. error in linux
bf .Lpseudo_end
.Lsyscall_error:
SYSCALL_ERROR_HANDLER
.Lpseudo_end:
/* Successful; return the syscall's value. */
rts
nop
#if defined NEED_CANCELLATION && defined CENABLE
.Lsocket_cancel:
/* Enable asynchronous cancellation. */
P(ADJUSTCFI_,NARGS)
sts.l pr,@-r15
cfi_adjust_cfa_offset (4)
cfi_rel_offset (pr, 0)
CENABLE
lds.l @r15+,pr
cfi_adjust_cfa_offset (-4)
cfi_restore (pr)
/* Do the system call trap. */
mov #+P(SOCKOP_,socket), r4
mov r15, r5
mov.l .L1,r3
trapa #0x12
sts.l pr,@-r15
cfi_adjust_cfa_offset (4)
cfi_rel_offset (pr, 0)
mov.l r0,@-r15
cfi_adjust_cfa_offset (4)
cfi_rel_offset (r0, 0)
CDISABLE
mov.l @r15+,r0
cfi_adjust_cfa_offset (-4)
cfi_restore (r0)
lds.l @r15+,pr
cfi_adjust_cfa_offset (-4)
cfi_restore (pr)
/* Pop args off the stack */
P(POPARGS_,NARGS)
mov r0, r1
mov #-12, r2
shad r2, r1
not r1, r1 // r1=0 means r0 = -1 to -4095
tst r1, r1 // i.e. error in linux
bf .Lpseudo_end
bra .Lsyscall_error
nop
#endif
.align 2
.L1:
.long SYS_ify(socketcall)
PSEUDO_END (__socket)
#ifndef NO_WEAK_ALIAS
weak_alias (__socket, socket)
#endif
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