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180 lines
4.6 KiB
ArmAsm
180 lines
4.6 KiB
ArmAsm
/* Copyright (C) 1999-2015 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep-cancel.h>
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#include <socketcall.h>
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#include <tls.h>
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#define P(a, b) P2(a, b)
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#define P2(a, b) a##b
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.text
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/* The socket-oriented system calls are handled unusally in Linux.
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They are all gated through the single `socketcall' system call number.
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`socketcall' takes two arguments: the first is the subcode, specifying
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which socket function is being called; and the second is a pointer to
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the arguments to the specific function.
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The .S files for the other calls just #define socket and #include this. */
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#ifndef __socket
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#ifndef NO_WEAK_ALIAS
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#define __socket P(__,socket)
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#else
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#define __socket socket
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#endif
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#endif
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#define PUSHARGS_1 mov.l r4,@-r15; \
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cfi_adjust_cfa_offset (4); \
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cfi_rel_offset (r4, 0)
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#define PUSHARGS_2 mov.l r5,@-r15; \
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cfi_adjust_cfa_offset (4); \
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cfi_rel_offset (r5, 0); \
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PUSHARGS_1
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#define PUSHARGS_3 mov.l r6,@-r15; \
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cfi_adjust_cfa_offset (4); \
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cfi_rel_offset (r6, 0); \
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PUSHARGS_2
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#define PUSHARGS_4 mov.l r7,@-r15; \
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cfi_adjust_cfa_offset (4); \
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cfi_rel_offset (r7, 0); \
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PUSHARGS_3
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#define PUSHARGS_5 PUSHARGS_4 /* Caller has already pushed arg 5 */
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#define PUSHARGS_6 PUSHARGS_4 /* Caller has already pushed arg 5,6 */
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#define POPARGS_1 add #4,r15; cfi_adjust_cfa_offset (-4)
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#define POPARGS_2 add #8,r15; cfi_adjust_cfa_offset (-8)
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#define POPARGS_3 add #12,r15; cfi_adjust_cfa_offset (-12)
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#define POPARGS_4 add #16,r15; cfi_adjust_cfa_offset (-16)
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#define POPARGS_5 POPARGS_4
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#define POPARGS_6 POPARGS_4
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#define ADJUSTCFI_1 cfi_adjust_cfa_offset (4); \
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cfi_offset (r4, -4)
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#define ADJUSTCFI_2 cfi_adjust_cfa_offset (8); \
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cfi_offset (r4, -4); \
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cfi_offset (r5, -8)
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#define ADJUSTCFI_3 cfi_adjust_cfa_offset (12); \
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cfi_offset (r4, -4); \
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cfi_offset (r5, -8); \
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cfi_offset (r6, -12)
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#define ADJUSTCFI_4 cfi_adjust_cfa_offset (16); \
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cfi_offset (r4, -4); \
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cfi_offset (r5, -8); \
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cfi_offset (r6, -12); \
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cfi_offset (r7, -16)
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#define ADJUSTCFI_5 ADJUSTCFI_4
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#define ADJUSTCFI_6 ADJUSTCFI_4
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#ifndef NARGS
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/* If we were called with no wrapper, this is really socket(). */
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#define NARGS 3
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#endif
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.globl __socket
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ENTRY (__socket)
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/* This will not work in the case of a socket call being interrupted
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by a signal. If the signal handler uses any stack the arguments
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to socket will be trashed. The results of a restart of any
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socket call are then unpredictable. */
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/* Push args onto the stack. */
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P(PUSHARGS_,NARGS)
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#if defined NEED_CANCELLATION && defined CENABLE
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SINGLE_THREAD_P
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bf .Lsocket_cancel
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#endif
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/* Do the system call trap. */
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mov #+P(SOCKOP_,socket), r4
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mov r15, r5
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mov.l .L1,r3
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trapa #0x12
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/* Pop args off the stack */
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P(POPARGS_,NARGS)
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mov r0, r1
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mov #-12, r2
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shad r2, r1
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not r1, r1 // r1=0 means r0 = -1 to -4095
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tst r1, r1 // i.e. error in linux
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bf .Lpseudo_end
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.Lsyscall_error:
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SYSCALL_ERROR_HANDLER
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.Lpseudo_end:
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/* Successful; return the syscall's value. */
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rts
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nop
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#if defined NEED_CANCELLATION && defined CENABLE
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.Lsocket_cancel:
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/* Enable asynchronous cancellation. */
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P(ADJUSTCFI_,NARGS)
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sts.l pr,@-r15
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cfi_adjust_cfa_offset (4)
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cfi_rel_offset (pr, 0)
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CENABLE
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lds.l @r15+,pr
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cfi_adjust_cfa_offset (-4)
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cfi_restore (pr)
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/* Do the system call trap. */
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mov #+P(SOCKOP_,socket), r4
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mov r15, r5
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mov.l .L1,r3
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trapa #0x12
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sts.l pr,@-r15
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cfi_adjust_cfa_offset (4)
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cfi_rel_offset (pr, 0)
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mov.l r0,@-r15
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cfi_adjust_cfa_offset (4)
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cfi_rel_offset (r0, 0)
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CDISABLE
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mov.l @r15+,r0
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cfi_adjust_cfa_offset (-4)
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cfi_restore (r0)
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lds.l @r15+,pr
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cfi_adjust_cfa_offset (-4)
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cfi_restore (pr)
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/* Pop args off the stack */
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P(POPARGS_,NARGS)
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mov r0, r1
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mov #-12, r2
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shad r2, r1
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not r1, r1 // r1=0 means r0 = -1 to -4095
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tst r1, r1 // i.e. error in linux
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bf .Lpseudo_end
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bra .Lsyscall_error
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nop
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#endif
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.align 2
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.L1:
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.long SYS_ify(socketcall)
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PSEUDO_END (__socket)
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#ifndef NO_WEAK_ALIAS
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weak_alias (__socket, socket)
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#endif
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