2017-01-01 00:14:16 +00:00
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/* Copyright (C) 1992-2017 Free Software Foundation, Inc.
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1997-05-22 02:18:07 +00:00
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>, August 1995.
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ARM changes by Philip Blundell, <pjb27@cam.ac.uk>, May 1997.
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1997-05-21 01:44:03 +00:00
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1997-05-22 02:18:07 +00:00
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The GNU C Library is free software; you can redistribute it and/or
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2001-07-06 04:56:23 +00:00
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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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1997-05-21 01:44:03 +00:00
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1997-05-22 02:18:07 +00:00
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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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2001-07-06 04:56:23 +00:00
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Lesser General Public License for more details.
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1997-05-21 01:44:03 +00:00
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2001-07-06 04:56:23 +00:00
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You should have received a copy of the GNU Lesser General Public
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2012-03-09 23:56:38 +00:00
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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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1997-05-21 01:44:03 +00:00
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#ifndef _LINUX_ARM_SYSDEP_H
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#define _LINUX_ARM_SYSDEP_H 1
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/* There is some commonality. */
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Add INLINE_SYSCALL_ERROR_RETURN_VALUE
For ia32 PIC, the first thing of many syscalls does is to call
__x86.get_pc_thunk.reg to load PC into reg in case there is an error,
which is required for setting errno. In most cases, there are no
errors. But we still call __x86.get_pc_thunk.reg. This patch adds
INLINE_SYSCALL_ERROR_RETURN_VALUE so that i386 can optimize setting
errno by branching to the internal __syscall_error without PLT.
With i386 INLINE_SYSCALL_ERROR_RETURN_VALUE and i386 syscall inlining
optimization for GCC 5, for sysdeps/unix/sysv/linux/fchmodat.c with
-O2 -march=i686 -mtune=generic, GCC 5.2 now generates:
<fchmodat>:
0: push %ebx
1: mov 0x14(%esp),%eax
5: mov 0x8(%esp),%ebx
9: mov 0xc(%esp),%ecx
d: mov 0x10(%esp),%edx
11: test $0xfffffeff,%eax
16: jne 38 <fchmodat+0x38>
18: test $0x1,%ah
1b: jne 48 <fchmodat+0x48>
1d: mov $0x132,%eax
22: call *%gs:0x10
29: cmp $0xfffff000,%eax
2e: ja 58 <fchmodat+0x58>
30: pop %ebx
31: ret
32: lea 0x0(%esi),%esi
38: pop %ebx
39: mov $0xffffffea,%eax
3e: jmp 3f <fchmodat+0x3f> 3f: R_386_PC32 __syscall_error
43: nop
44: lea 0x0(%esi,%eiz,1),%esi
48: pop %ebx
49: mov $0xffffffa1,%eax
4e: jmp 4f <fchmodat+0x4f> 4f: R_386_PC32 __syscall_error
53: nop
54: lea 0x0(%esi,%eiz,1),%esi
58: pop %ebx
59: jmp 5a <fchmodat+0x5a> 5a: R_386_PC32 __syscall_error
instead of
<fchmodat>:
0: sub $0x8,%esp
3: mov 0x18(%esp),%eax
7: mov %ebx,(%esp)
a: call b <fchmodat+0xb> b: R_386_PC32 __x86.get_pc_thunk.bx
f: add $0x2,%ebx 11: R_386_GOTPC _GLOBAL_OFFSET_TABLE_
15: mov %edi,0x4(%esp)
19: test $0xfffffeff,%eax
1e: jne 70 <fchmodat+0x70>
20: test $0x1,%ah
23: jne 88 <fchmodat+0x88>
25: mov 0x14(%esp),%edx
29: mov 0x10(%esp),%ecx
2d: mov 0xc(%esp),%edi
31: xchg %ebx,%edi
33: mov $0x132,%eax
38: call *%gs:0x10
3f: xchg %edi,%ebx
41: cmp $0xfffff000,%eax
46: ja 58 <fchmodat+0x58>
48: mov (%esp),%ebx
4b: mov 0x4(%esp),%edi
4f: add $0x8,%esp
52: ret
53: nop
54: lea 0x0(%esi,%eiz,1),%esi
58: mov 0x0(%ebx),%edx 5a: R_386_TLS_GOTIE __libc_errno
5e: neg %eax
60: mov %eax,%gs:(%edx)
63: mov $0xffffffff,%eax
68: jmp 48 <fchmodat+0x48>
6a: lea 0x0(%esi),%esi
70: mov 0x0(%ebx),%eax 72: R_386_TLS_GOTIE __libc_errno
76: movl $0x16,%gs:(%eax)
7d: mov $0xffffffff,%eax
82: jmp 48 <fchmodat+0x48>
84: lea 0x0(%esi,%eiz,1),%esi
88: mov 0x0(%ebx),%eax 8a: R_386_TLS_GOTIE __libc_errno
8e: movl $0x5f,%gs:(%eax)
95: mov $0xffffffff,%eax
9a: jmp 48 <fchmodat+0x48>
* sysdeps/unix/sysv/linux/sysdep.h: New file.
* sysdeps/unix/sysv/linux/i386/sysdep.c: Likewise.
* sysdeps/unix/sysv/linux/alpha/sysdep.h: Include
<sysdeps/unix/sysv/linux/sysdep.h>.
* sysdeps/unix/sysv/linux/arm/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/generic/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/hppa/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/ia64/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/m68k/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/microblaze/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/mips/mips32/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/n32/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/n64/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/sh/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/sparc/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/x86_64/sysdep.h: Likewise.
* sysdeps/unix/sysv/linux/i386/Makefile [$(subdir) == csu]
(sysdep-dl-routines): Add sysdep.
[$(subdir) == nptl] (libpthread-routines): Likewise.
[$(subdir) == rt] (librt-routines): Likewise.
* sysdeps/unix/sysv/linux/i386/clone.S (__clone): Don't check
PIC when branching to SYSCALL_ERROR_LABEL.
* sysdeps/unix/sysv/linux/i386/sysdep.S: Removed.
* sysdeps/unix/sysv/linux/i386/sysdep.h: Include
<sysdeps/unix/sysv/linux/sysdep.h>.
(SYSCALL_ERROR_LABEL): Changed to __syscall_error.
(SYSCALL_ERROR_ERRNO): Removed.
(SYSCALL_ERROR_HANDLER): Changed to empty.
(SYSCALL_ERROR_HANDLER_TLS_STORE): Likewise.
(__syscall_error): New prototype.
[IS_IN (libc)] (INLINE_SYSCALL): New macro.
(INLINE_SYSCALL_ERROR_RETURN_VALUE): Likewise.
2015-10-13 18:58:53 +00:00
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#include <sysdeps/unix/sysv/linux/sysdep.h>
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2006-02-28 19:26:36 +00:00
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#include <sysdeps/unix/arm/sysdep.h>
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1997-05-21 01:44:03 +00:00
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* sysdeps/arm/bits/setjmp.h, sysdeps/arm/fpu/bits/setjmp.h: Update
include guards.
* sysdeps/unix/arm/sysdep.S (syscall_error): Handle USE___THREAD and
RTLD_PRIVATE_ERRNO.
* sysdeps/unix/sysv/linux/arm/clone.S (__clone): Handle RESET_PID.
Handle new arguments.
* sysdeps/unix/sysv/linux/arm/vfork.S (__vfork): Use SAVE_PID and
RESTORE_PID. Use the right syscall error handler.
* sysdeps/unix/sysv/linux/arm/eabi/sigrestorer.S
(__default_sa_restorer, __default_rt_sa_restorer): Add unwind
information.
* sysdeps/unix/sysv/linux/arm/eabi/socket.S: Update formatting.
Add unwind information. Correct stack alignment typo.
* sysdeps/unix/sysv/linux/arm/eabi/sysdep.h
(INTERNAL_SYSCALL_NCS): Define.
* sysdeps/unix/sysv/linux/arm/sigaction.c
(__libc_sigaction): Remove never-valid handling for SA_ONSTACK.
* sysdeps/unix/sysv/linux/arm/socket.S: Whitespace cleanup.
* sysdeps/unix/sysv/linux/arm/sysdep.h (SYSCALL_ERROR_HANDLER): Handle
RTLD_PRIVATE_ERRNO.
(INTERNAL_SYSCALL_NCS): Implement.
* sysdeps/arm/nptl/Makefile, sysdeps/arm/nptl/jmpbuf-unwind.h,
sysdeps/arm/nptl/pthread_spin_lock.S,
sysdeps/arm/nptl/pthread_spin_trylock.S,
sysdeps/arm/nptl/pthreaddef.h, sysdeps/arm/nptl/tcb-offsets.sym,
sysdeps/arm/nptl/tls.h, sysdeps/unix/sysv/linux/arm/eabi/Makefile,
sysdeps/unix/sysv/linux/arm/eabi/nptl/Makefile,
sysdeps/unix/sysv/linux/arm/eabi/nptl/configure,
sysdeps/unix/sysv/linux/arm/eabi/nptl/configure.in,
sysdeps/unix/sysv/linux/arm/eabi/nptl/nptl-aeabi_unwind_cpp_pr1.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/rt-aeabi_unwind_cpp_pr1.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/sysdep-cancel.h,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-forcedunwind.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-resume.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind.h,
sysdeps/unix/sysv/linux/arm/nptl/Versions,
sysdeps/unix/sysv/linux/arm/nptl/bits/atomic.h,
sysdeps/unix/sysv/linux/arm/nptl/bits/pthreadtypes.h,
sysdeps/unix/sysv/linux/arm/nptl/clone.S,
sysdeps/unix/sysv/linux/arm/nptl/createthread.c,
sysdeps/unix/sysv/linux/arm/nptl/fork.c,
sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.c,
sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.h,
sysdeps/unix/sysv/linux/arm/nptl/pt-vfork.S,
sysdeps/unix/sysv/linux/arm/nptl/pthread_once.c,
sysdeps/unix/sysv/linux/arm/nptl/vfork.S: New files.
2005-11-16 19:03:42 +00:00
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/* Defines RTLD_PRIVATE_ERRNO and USE_DL_SYSINFO. */
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#include <dl-sysdep.h>
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2009-01-27 15:36:22 +00:00
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#include <tls.h>
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2009-03-17 12:32:06 +00:00
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/* In order to get __set_errno() definition in INLINE_SYSCALL. */
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#ifndef __ASSEMBLER__
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#include <errno.h>
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#endif
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1997-05-21 01:44:03 +00:00
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/* For Linux we can use the system call table in the header file
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/usr/include/asm/unistd.h
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of the kernel. But these symbols do not follow the SYS_* syntax
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so we have to redefine the `SYS_ify' macro here. */
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#undef SYS_ify
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1997-11-13 00:19:24 +00:00
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#define SYS_ify(syscall_name) (__NR_##syscall_name)
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1997-05-21 01:44:03 +00:00
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2012-05-21 10:45:52 +00:00
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#include <bits/hwcap.h>
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2006-09-21 18:39:51 +00:00
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1998-05-29 10:20:59 +00:00
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#ifdef __ASSEMBLER__
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1997-05-21 01:44:03 +00:00
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2013-03-01 05:37:02 +00:00
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#ifndef ARCH_HAS_HARD_TP
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2013-02-14 04:10:45 +00:00
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/* Internal macro calling the linux kernel kuser_get_tls helper.
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Note that in thumb mode, a constant pool break is often out of range, so
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we always expand the constant inline. */
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2013-03-01 05:37:02 +00:00
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# ifdef __thumb2__
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# define GET_TLS_BODY \
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2013-02-14 04:10:45 +00:00
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movw r0, #0x0fe0; \
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movt r0, #0xffff; \
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blx r0
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2013-03-01 05:37:02 +00:00
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# else
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# define GET_TLS_BODY \
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2013-02-14 04:10:45 +00:00
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mov r0, #0xffff0fff; /* Point to the high page. */ \
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mov lr, pc; /* Save our return address. */ \
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sub pc, r0, #31 /* Jump to the TLS entry. */
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2013-03-01 05:37:02 +00:00
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# endif
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2013-02-14 04:10:45 +00:00
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/* Helper to get the TLS base pointer. Save LR in TMP, return in R0,
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and no other registers clobbered. TMP may be LR itself to indicate
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that no save is necessary. */
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2013-03-01 05:37:02 +00:00
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# undef GET_TLS
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# define GET_TLS(TMP) \
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2013-02-14 04:10:45 +00:00
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.ifnc TMP, lr; \
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mov TMP, lr; \
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cfi_register (lr, TMP); \
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GET_TLS_BODY; \
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mov lr, TMP; \
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cfi_restore (lr); \
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.else; \
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GET_TLS_BODY; \
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.endif
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2013-03-01 05:37:02 +00:00
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#endif /* ARCH_HAS_HARD_TP */
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2013-02-14 04:10:45 +00:00
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1997-05-21 01:44:03 +00:00
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/* Linux uses a negative return value to indicate syscall errors,
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unlike most Unices, which use the condition codes' carry flag.
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Since version 2.1 the return value of a system call might be
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negative even if the call succeeded. E.g., the `lseek' system call
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might return a large offset. Therefore we must not anymore test
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1998-03-18 14:34:49 +00:00
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for < 0, but test for a real error by making sure the value in R0
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1997-05-21 01:44:03 +00:00
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is a real error number. Linus said he will make sure the no syscall
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* sysdeps/arm/bits/setjmp.h, sysdeps/arm/fpu/bits/setjmp.h: Update
include guards.
* sysdeps/unix/arm/sysdep.S (syscall_error): Handle USE___THREAD and
RTLD_PRIVATE_ERRNO.
* sysdeps/unix/sysv/linux/arm/clone.S (__clone): Handle RESET_PID.
Handle new arguments.
* sysdeps/unix/sysv/linux/arm/vfork.S (__vfork): Use SAVE_PID and
RESTORE_PID. Use the right syscall error handler.
* sysdeps/unix/sysv/linux/arm/eabi/sigrestorer.S
(__default_sa_restorer, __default_rt_sa_restorer): Add unwind
information.
* sysdeps/unix/sysv/linux/arm/eabi/socket.S: Update formatting.
Add unwind information. Correct stack alignment typo.
* sysdeps/unix/sysv/linux/arm/eabi/sysdep.h
(INTERNAL_SYSCALL_NCS): Define.
* sysdeps/unix/sysv/linux/arm/sigaction.c
(__libc_sigaction): Remove never-valid handling for SA_ONSTACK.
* sysdeps/unix/sysv/linux/arm/socket.S: Whitespace cleanup.
* sysdeps/unix/sysv/linux/arm/sysdep.h (SYSCALL_ERROR_HANDLER): Handle
RTLD_PRIVATE_ERRNO.
(INTERNAL_SYSCALL_NCS): Implement.
* sysdeps/arm/nptl/Makefile, sysdeps/arm/nptl/jmpbuf-unwind.h,
sysdeps/arm/nptl/pthread_spin_lock.S,
sysdeps/arm/nptl/pthread_spin_trylock.S,
sysdeps/arm/nptl/pthreaddef.h, sysdeps/arm/nptl/tcb-offsets.sym,
sysdeps/arm/nptl/tls.h, sysdeps/unix/sysv/linux/arm/eabi/Makefile,
sysdeps/unix/sysv/linux/arm/eabi/nptl/Makefile,
sysdeps/unix/sysv/linux/arm/eabi/nptl/configure,
sysdeps/unix/sysv/linux/arm/eabi/nptl/configure.in,
sysdeps/unix/sysv/linux/arm/eabi/nptl/nptl-aeabi_unwind_cpp_pr1.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/rt-aeabi_unwind_cpp_pr1.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/sysdep-cancel.h,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-forcedunwind.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-resume.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind.h,
sysdeps/unix/sysv/linux/arm/nptl/Versions,
sysdeps/unix/sysv/linux/arm/nptl/bits/atomic.h,
sysdeps/unix/sysv/linux/arm/nptl/bits/pthreadtypes.h,
sysdeps/unix/sysv/linux/arm/nptl/clone.S,
sysdeps/unix/sysv/linux/arm/nptl/createthread.c,
sysdeps/unix/sysv/linux/arm/nptl/fork.c,
sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.c,
sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.h,
sysdeps/unix/sysv/linux/arm/nptl/pt-vfork.S,
sysdeps/unix/sysv/linux/arm/nptl/pthread_once.c,
sysdeps/unix/sysv/linux/arm/nptl/vfork.S: New files.
2005-11-16 19:03:42 +00:00
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returns a value in -1 .. -4095 as a valid result so we can safely
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1997-05-21 01:44:03 +00:00
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test with -4095. */
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1998-04-01 09:11:44 +00:00
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1997-05-21 01:44:03 +00:00
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#undef PSEUDO
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2013-02-28 07:04:17 +00:00
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#define PSEUDO(name, syscall_name, args) \
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.text; \
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ENTRY (name); \
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DO_CALL (syscall_name, args); \
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cmn r0, $4096;
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#define PSEUDO_RET \
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2013-02-14 04:27:09 +00:00
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it cc; \
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2013-02-28 07:04:17 +00:00
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RETINSTR(cc, lr); \
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b PLTJMP(SYSCALL_ERROR)
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2000-07-29 18:03:21 +00:00
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#undef ret
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#define ret PSEUDO_RET
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1997-05-21 01:44:03 +00:00
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#undef PSEUDO_END
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2013-02-28 07:04:17 +00:00
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#define PSEUDO_END(name) \
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SYSCALL_ERROR_HANDLER; \
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1997-05-21 01:44:03 +00:00
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END (name)
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2003-03-23 19:42:23 +00:00
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#undef PSEUDO_NOERRNO
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2013-02-28 07:04:17 +00:00
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#define PSEUDO_NOERRNO(name, syscall_name, args) \
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.text; \
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ENTRY (name); \
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DO_CALL (syscall_name, args);
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2003-03-23 19:42:23 +00:00
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2013-02-28 07:04:17 +00:00
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#define PSEUDO_RET_NOERRNO \
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DO_RET (lr);
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2003-03-27 02:45:49 +00:00
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2003-03-23 19:42:23 +00:00
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#undef ret_NOERRNO
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#define ret_NOERRNO PSEUDO_RET_NOERRNO
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#undef PSEUDO_END_NOERRNO
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2013-02-28 07:04:17 +00:00
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#define PSEUDO_END_NOERRNO(name) \
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2003-03-23 19:42:23 +00:00
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END (name)
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2003-08-25 18:30:43 +00:00
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/* The function has to return the error code. */
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|
|
#undef PSEUDO_ERRVAL
|
2013-02-28 07:04:17 +00:00
|
|
|
#define PSEUDO_ERRVAL(name, syscall_name, args) \
|
|
|
|
.text; \
|
|
|
|
ENTRY (name) \
|
|
|
|
DO_CALL (syscall_name, args); \
|
|
|
|
rsb r0, r0, #0
|
2003-08-25 18:30:43 +00:00
|
|
|
|
|
|
|
#undef PSEUDO_END_ERRVAL
|
2013-02-28 07:04:17 +00:00
|
|
|
#define PSEUDO_END_ERRVAL(name) \
|
2003-08-25 18:30:43 +00:00
|
|
|
END (name)
|
|
|
|
|
|
|
|
#define ret_ERRVAL PSEUDO_RET_NOERRNO
|
|
|
|
|
2014-11-24 09:33:45 +00:00
|
|
|
#if !IS_IN (libc)
|
2003-01-08 00:15:07 +00:00
|
|
|
# define SYSCALL_ERROR __local_syscall_error
|
* sysdeps/arm/bits/setjmp.h, sysdeps/arm/fpu/bits/setjmp.h: Update
include guards.
* sysdeps/unix/arm/sysdep.S (syscall_error): Handle USE___THREAD and
RTLD_PRIVATE_ERRNO.
* sysdeps/unix/sysv/linux/arm/clone.S (__clone): Handle RESET_PID.
Handle new arguments.
* sysdeps/unix/sysv/linux/arm/vfork.S (__vfork): Use SAVE_PID and
RESTORE_PID. Use the right syscall error handler.
* sysdeps/unix/sysv/linux/arm/eabi/sigrestorer.S
(__default_sa_restorer, __default_rt_sa_restorer): Add unwind
information.
* sysdeps/unix/sysv/linux/arm/eabi/socket.S: Update formatting.
Add unwind information. Correct stack alignment typo.
* sysdeps/unix/sysv/linux/arm/eabi/sysdep.h
(INTERNAL_SYSCALL_NCS): Define.
* sysdeps/unix/sysv/linux/arm/sigaction.c
(__libc_sigaction): Remove never-valid handling for SA_ONSTACK.
* sysdeps/unix/sysv/linux/arm/socket.S: Whitespace cleanup.
* sysdeps/unix/sysv/linux/arm/sysdep.h (SYSCALL_ERROR_HANDLER): Handle
RTLD_PRIVATE_ERRNO.
(INTERNAL_SYSCALL_NCS): Implement.
* sysdeps/arm/nptl/Makefile, sysdeps/arm/nptl/jmpbuf-unwind.h,
sysdeps/arm/nptl/pthread_spin_lock.S,
sysdeps/arm/nptl/pthread_spin_trylock.S,
sysdeps/arm/nptl/pthreaddef.h, sysdeps/arm/nptl/tcb-offsets.sym,
sysdeps/arm/nptl/tls.h, sysdeps/unix/sysv/linux/arm/eabi/Makefile,
sysdeps/unix/sysv/linux/arm/eabi/nptl/Makefile,
sysdeps/unix/sysv/linux/arm/eabi/nptl/configure,
sysdeps/unix/sysv/linux/arm/eabi/nptl/configure.in,
sysdeps/unix/sysv/linux/arm/eabi/nptl/nptl-aeabi_unwind_cpp_pr1.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/rt-aeabi_unwind_cpp_pr1.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/sysdep-cancel.h,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-forcedunwind.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-resume.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind.h,
sysdeps/unix/sysv/linux/arm/nptl/Versions,
sysdeps/unix/sysv/linux/arm/nptl/bits/atomic.h,
sysdeps/unix/sysv/linux/arm/nptl/bits/pthreadtypes.h,
sysdeps/unix/sysv/linux/arm/nptl/clone.S,
sysdeps/unix/sysv/linux/arm/nptl/createthread.c,
sysdeps/unix/sysv/linux/arm/nptl/fork.c,
sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.c,
sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.h,
sysdeps/unix/sysv/linux/arm/nptl/pt-vfork.S,
sysdeps/unix/sysv/linux/arm/nptl/pthread_once.c,
sysdeps/unix/sysv/linux/arm/nptl/vfork.S: New files.
2005-11-16 19:03:42 +00:00
|
|
|
# if RTLD_PRIVATE_ERRNO
|
|
|
|
# define SYSCALL_ERROR_HANDLER \
|
|
|
|
__local_syscall_error: \
|
2013-02-14 05:21:39 +00:00
|
|
|
rsb r0, r0, #0; \
|
|
|
|
LDST_PCREL(str, r0, r1, C_SYMBOL_NAME(rtld_errno)); \
|
|
|
|
mvn r0, #0; \
|
|
|
|
DO_RET(lr)
|
* sysdeps/arm/bits/setjmp.h, sysdeps/arm/fpu/bits/setjmp.h: Update
include guards.
* sysdeps/unix/arm/sysdep.S (syscall_error): Handle USE___THREAD and
RTLD_PRIVATE_ERRNO.
* sysdeps/unix/sysv/linux/arm/clone.S (__clone): Handle RESET_PID.
Handle new arguments.
* sysdeps/unix/sysv/linux/arm/vfork.S (__vfork): Use SAVE_PID and
RESTORE_PID. Use the right syscall error handler.
* sysdeps/unix/sysv/linux/arm/eabi/sigrestorer.S
(__default_sa_restorer, __default_rt_sa_restorer): Add unwind
information.
* sysdeps/unix/sysv/linux/arm/eabi/socket.S: Update formatting.
Add unwind information. Correct stack alignment typo.
* sysdeps/unix/sysv/linux/arm/eabi/sysdep.h
(INTERNAL_SYSCALL_NCS): Define.
* sysdeps/unix/sysv/linux/arm/sigaction.c
(__libc_sigaction): Remove never-valid handling for SA_ONSTACK.
* sysdeps/unix/sysv/linux/arm/socket.S: Whitespace cleanup.
* sysdeps/unix/sysv/linux/arm/sysdep.h (SYSCALL_ERROR_HANDLER): Handle
RTLD_PRIVATE_ERRNO.
(INTERNAL_SYSCALL_NCS): Implement.
* sysdeps/arm/nptl/Makefile, sysdeps/arm/nptl/jmpbuf-unwind.h,
sysdeps/arm/nptl/pthread_spin_lock.S,
sysdeps/arm/nptl/pthread_spin_trylock.S,
sysdeps/arm/nptl/pthreaddef.h, sysdeps/arm/nptl/tcb-offsets.sym,
sysdeps/arm/nptl/tls.h, sysdeps/unix/sysv/linux/arm/eabi/Makefile,
sysdeps/unix/sysv/linux/arm/eabi/nptl/Makefile,
sysdeps/unix/sysv/linux/arm/eabi/nptl/configure,
sysdeps/unix/sysv/linux/arm/eabi/nptl/configure.in,
sysdeps/unix/sysv/linux/arm/eabi/nptl/nptl-aeabi_unwind_cpp_pr1.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/rt-aeabi_unwind_cpp_pr1.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/sysdep-cancel.h,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-forcedunwind.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-resume.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind.h,
sysdeps/unix/sysv/linux/arm/nptl/Versions,
sysdeps/unix/sysv/linux/arm/nptl/bits/atomic.h,
sysdeps/unix/sysv/linux/arm/nptl/bits/pthreadtypes.h,
sysdeps/unix/sysv/linux/arm/nptl/clone.S,
sysdeps/unix/sysv/linux/arm/nptl/createthread.c,
sysdeps/unix/sysv/linux/arm/nptl/fork.c,
sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.c,
sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.h,
sysdeps/unix/sysv/linux/arm/nptl/pt-vfork.S,
sysdeps/unix/sysv/linux/arm/nptl/pthread_once.c,
sysdeps/unix/sysv/linux/arm/nptl/vfork.S: New files.
2005-11-16 19:03:42 +00:00
|
|
|
# else
|
2010-03-26 18:12:56 +00:00
|
|
|
# if defined(__ARM_ARCH_4T__) && defined(__THUMB_INTERWORK__)
|
|
|
|
# define POP_PC \
|
2013-02-15 05:00:14 +00:00
|
|
|
pop { lr }; \
|
2010-03-26 18:12:56 +00:00
|
|
|
cfi_adjust_cfa_offset (-4); \
|
|
|
|
cfi_restore (lr); \
|
|
|
|
bx lr
|
|
|
|
# else
|
2013-02-15 05:00:14 +00:00
|
|
|
# define POP_PC pop { pc }
|
2010-03-26 18:12:56 +00:00
|
|
|
# endif
|
* sysdeps/arm/bits/setjmp.h, sysdeps/arm/fpu/bits/setjmp.h: Update
include guards.
* sysdeps/unix/arm/sysdep.S (syscall_error): Handle USE___THREAD and
RTLD_PRIVATE_ERRNO.
* sysdeps/unix/sysv/linux/arm/clone.S (__clone): Handle RESET_PID.
Handle new arguments.
* sysdeps/unix/sysv/linux/arm/vfork.S (__vfork): Use SAVE_PID and
RESTORE_PID. Use the right syscall error handler.
* sysdeps/unix/sysv/linux/arm/eabi/sigrestorer.S
(__default_sa_restorer, __default_rt_sa_restorer): Add unwind
information.
* sysdeps/unix/sysv/linux/arm/eabi/socket.S: Update formatting.
Add unwind information. Correct stack alignment typo.
* sysdeps/unix/sysv/linux/arm/eabi/sysdep.h
(INTERNAL_SYSCALL_NCS): Define.
* sysdeps/unix/sysv/linux/arm/sigaction.c
(__libc_sigaction): Remove never-valid handling for SA_ONSTACK.
* sysdeps/unix/sysv/linux/arm/socket.S: Whitespace cleanup.
* sysdeps/unix/sysv/linux/arm/sysdep.h (SYSCALL_ERROR_HANDLER): Handle
RTLD_PRIVATE_ERRNO.
(INTERNAL_SYSCALL_NCS): Implement.
* sysdeps/arm/nptl/Makefile, sysdeps/arm/nptl/jmpbuf-unwind.h,
sysdeps/arm/nptl/pthread_spin_lock.S,
sysdeps/arm/nptl/pthread_spin_trylock.S,
sysdeps/arm/nptl/pthreaddef.h, sysdeps/arm/nptl/tcb-offsets.sym,
sysdeps/arm/nptl/tls.h, sysdeps/unix/sysv/linux/arm/eabi/Makefile,
sysdeps/unix/sysv/linux/arm/eabi/nptl/Makefile,
sysdeps/unix/sysv/linux/arm/eabi/nptl/configure,
sysdeps/unix/sysv/linux/arm/eabi/nptl/configure.in,
sysdeps/unix/sysv/linux/arm/eabi/nptl/nptl-aeabi_unwind_cpp_pr1.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/rt-aeabi_unwind_cpp_pr1.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/sysdep-cancel.h,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-forcedunwind.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-resume.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind.h,
sysdeps/unix/sysv/linux/arm/nptl/Versions,
sysdeps/unix/sysv/linux/arm/nptl/bits/atomic.h,
sysdeps/unix/sysv/linux/arm/nptl/bits/pthreadtypes.h,
sysdeps/unix/sysv/linux/arm/nptl/clone.S,
sysdeps/unix/sysv/linux/arm/nptl/createthread.c,
sysdeps/unix/sysv/linux/arm/nptl/fork.c,
sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.c,
sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.h,
sysdeps/unix/sysv/linux/arm/nptl/pt-vfork.S,
sysdeps/unix/sysv/linux/arm/nptl/pthread_once.c,
sysdeps/unix/sysv/linux/arm/nptl/vfork.S: New files.
2005-11-16 19:03:42 +00:00
|
|
|
# define SYSCALL_ERROR_HANDLER \
|
2003-01-08 00:15:07 +00:00
|
|
|
__local_syscall_error: \
|
2013-02-15 05:00:14 +00:00
|
|
|
push { lr }; \
|
2010-03-26 18:12:56 +00:00
|
|
|
cfi_adjust_cfa_offset (4); \
|
|
|
|
cfi_rel_offset (lr, 0); \
|
2013-02-15 05:00:14 +00:00
|
|
|
push { r0 }; \
|
2010-03-26 18:12:56 +00:00
|
|
|
cfi_adjust_cfa_offset (4); \
|
2003-01-08 00:15:07 +00:00
|
|
|
bl PLTJMP(C_SYMBOL_NAME(__errno_location)); \
|
2013-02-15 05:00:14 +00:00
|
|
|
pop { r1 }; \
|
2010-03-26 18:12:56 +00:00
|
|
|
cfi_adjust_cfa_offset (-4); \
|
2003-01-08 00:15:07 +00:00
|
|
|
rsb r1, r1, #0; \
|
|
|
|
str r1, [r0]; \
|
|
|
|
mvn r0, #0; \
|
2009-11-06 08:07:18 +00:00
|
|
|
POP_PC;
|
* sysdeps/arm/bits/setjmp.h, sysdeps/arm/fpu/bits/setjmp.h: Update
include guards.
* sysdeps/unix/arm/sysdep.S (syscall_error): Handle USE___THREAD and
RTLD_PRIVATE_ERRNO.
* sysdeps/unix/sysv/linux/arm/clone.S (__clone): Handle RESET_PID.
Handle new arguments.
* sysdeps/unix/sysv/linux/arm/vfork.S (__vfork): Use SAVE_PID and
RESTORE_PID. Use the right syscall error handler.
* sysdeps/unix/sysv/linux/arm/eabi/sigrestorer.S
(__default_sa_restorer, __default_rt_sa_restorer): Add unwind
information.
* sysdeps/unix/sysv/linux/arm/eabi/socket.S: Update formatting.
Add unwind information. Correct stack alignment typo.
* sysdeps/unix/sysv/linux/arm/eabi/sysdep.h
(INTERNAL_SYSCALL_NCS): Define.
* sysdeps/unix/sysv/linux/arm/sigaction.c
(__libc_sigaction): Remove never-valid handling for SA_ONSTACK.
* sysdeps/unix/sysv/linux/arm/socket.S: Whitespace cleanup.
* sysdeps/unix/sysv/linux/arm/sysdep.h (SYSCALL_ERROR_HANDLER): Handle
RTLD_PRIVATE_ERRNO.
(INTERNAL_SYSCALL_NCS): Implement.
* sysdeps/arm/nptl/Makefile, sysdeps/arm/nptl/jmpbuf-unwind.h,
sysdeps/arm/nptl/pthread_spin_lock.S,
sysdeps/arm/nptl/pthread_spin_trylock.S,
sysdeps/arm/nptl/pthreaddef.h, sysdeps/arm/nptl/tcb-offsets.sym,
sysdeps/arm/nptl/tls.h, sysdeps/unix/sysv/linux/arm/eabi/Makefile,
sysdeps/unix/sysv/linux/arm/eabi/nptl/Makefile,
sysdeps/unix/sysv/linux/arm/eabi/nptl/configure,
sysdeps/unix/sysv/linux/arm/eabi/nptl/configure.in,
sysdeps/unix/sysv/linux/arm/eabi/nptl/nptl-aeabi_unwind_cpp_pr1.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/rt-aeabi_unwind_cpp_pr1.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/sysdep-cancel.h,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-forcedunwind.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-resume.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind.h,
sysdeps/unix/sysv/linux/arm/nptl/Versions,
sysdeps/unix/sysv/linux/arm/nptl/bits/atomic.h,
sysdeps/unix/sysv/linux/arm/nptl/bits/pthreadtypes.h,
sysdeps/unix/sysv/linux/arm/nptl/clone.S,
sysdeps/unix/sysv/linux/arm/nptl/createthread.c,
sysdeps/unix/sysv/linux/arm/nptl/fork.c,
sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.c,
sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.h,
sysdeps/unix/sysv/linux/arm/nptl/pt-vfork.S,
sysdeps/unix/sysv/linux/arm/nptl/pthread_once.c,
sysdeps/unix/sysv/linux/arm/nptl/vfork.S: New files.
2005-11-16 19:03:42 +00:00
|
|
|
# endif
|
2003-01-08 00:15:07 +00:00
|
|
|
#else
|
|
|
|
# define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.S is used. */
|
|
|
|
# define SYSCALL_ERROR __syscall_error
|
|
|
|
#endif
|
1998-04-01 09:11:44 +00:00
|
|
|
|
2012-04-21 15:38:55 +00:00
|
|
|
/* The ARM EABI user interface passes the syscall number in r7, instead
|
|
|
|
of in the swi. This is more efficient, because the kernel does not need
|
|
|
|
to fetch the swi from memory to find out the number; which can be painful
|
|
|
|
with separate I-cache and D-cache. Make sure to use 0 for the SWI
|
|
|
|
argument; otherwise the (optional) compatibility code for APCS binaries
|
|
|
|
may be invoked. */
|
|
|
|
|
1998-04-01 09:11:44 +00:00
|
|
|
/* Linux takes system call args in registers:
|
|
|
|
arg 1 r0
|
|
|
|
arg 2 r1
|
|
|
|
arg 3 r2
|
|
|
|
arg 4 r3
|
|
|
|
arg 5 r4 (this is different from the APCS convention)
|
1999-12-27 06:06:32 +00:00
|
|
|
arg 6 r5
|
|
|
|
arg 7 r6
|
1998-04-01 09:11:44 +00:00
|
|
|
|
|
|
|
The compiler is going to form a call by coming here, through PSEUDO, with
|
|
|
|
arguments
|
2014-02-08 01:52:38 +00:00
|
|
|
syscall number in the DO_CALL macro
|
|
|
|
arg 1 r0
|
|
|
|
arg 2 r1
|
|
|
|
arg 3 r2
|
|
|
|
arg 4 r3
|
|
|
|
arg 5 [sp]
|
1999-12-27 06:06:32 +00:00
|
|
|
arg 6 [sp+4]
|
|
|
|
arg 7 [sp+8]
|
1998-04-01 09:11:44 +00:00
|
|
|
|
1999-12-27 06:06:32 +00:00
|
|
|
We need to shuffle values between R4..R6 and the stack so that the
|
|
|
|
caller's v1..v3 and stack frame are not corrupted, and the kernel
|
|
|
|
sees the right arguments.
|
1998-04-01 09:11:44 +00:00
|
|
|
|
|
|
|
*/
|
1997-05-21 01:44:03 +00:00
|
|
|
|
2012-04-21 15:38:55 +00:00
|
|
|
/* We must save and restore r7 (call-saved) for the syscall number.
|
|
|
|
We never make function calls from inside here (only potentially
|
|
|
|
signal handlers), so we do not bother with doubleword alignment.
|
|
|
|
|
|
|
|
Just like the APCS syscall convention, the EABI syscall convention uses
|
|
|
|
r0 through r6 for up to seven syscall arguments. None are ever passed to
|
|
|
|
the kernel on the stack, although incoming arguments are on the stack for
|
|
|
|
syscalls with five or more arguments.
|
|
|
|
|
|
|
|
The assembler will convert the literal pool load to a move for most
|
|
|
|
syscalls. */
|
|
|
|
|
1997-05-21 01:44:03 +00:00
|
|
|
#undef DO_CALL
|
2013-02-28 07:04:17 +00:00
|
|
|
#define DO_CALL(syscall_name, args) \
|
|
|
|
DOARGS_##args; \
|
|
|
|
ldr r7, =SYS_ify (syscall_name); \
|
|
|
|
swi 0x0; \
|
|
|
|
UNDOARGS_##args
|
1998-04-01 09:11:44 +00:00
|
|
|
|
2012-04-21 15:38:55 +00:00
|
|
|
#undef DOARGS_0
|
2013-02-28 07:04:17 +00:00
|
|
|
#define DOARGS_0 \
|
|
|
|
.fnstart; \
|
2013-02-15 05:00:14 +00:00
|
|
|
push { r7 }; \
|
2013-02-28 07:04:17 +00:00
|
|
|
cfi_adjust_cfa_offset (4); \
|
|
|
|
cfi_rel_offset (r7, 0); \
|
|
|
|
.save { r7 }
|
2012-04-21 15:38:55 +00:00
|
|
|
#undef DOARGS_1
|
|
|
|
#define DOARGS_1 DOARGS_0
|
|
|
|
#undef DOARGS_2
|
|
|
|
#define DOARGS_2 DOARGS_0
|
|
|
|
#undef DOARGS_3
|
|
|
|
#define DOARGS_3 DOARGS_0
|
|
|
|
#undef DOARGS_4
|
|
|
|
#define DOARGS_4 DOARGS_0
|
|
|
|
#undef DOARGS_5
|
2013-02-28 07:04:17 +00:00
|
|
|
#define DOARGS_5 \
|
|
|
|
.fnstart; \
|
2013-02-15 05:00:14 +00:00
|
|
|
push {r4, r7}; \
|
2013-02-28 07:04:17 +00:00
|
|
|
cfi_adjust_cfa_offset (8); \
|
|
|
|
cfi_rel_offset (r4, 0); \
|
|
|
|
cfi_rel_offset (r7, 4); \
|
|
|
|
.save { r4, r7 }; \
|
|
|
|
ldr r4, [sp, #8]
|
2012-04-21 15:38:55 +00:00
|
|
|
#undef DOARGS_6
|
2013-02-28 07:04:17 +00:00
|
|
|
#define DOARGS_6 \
|
|
|
|
.fnstart; \
|
|
|
|
mov ip, sp; \
|
2013-02-15 05:00:14 +00:00
|
|
|
push {r4, r5, r7}; \
|
2013-02-28 07:04:17 +00:00
|
|
|
cfi_adjust_cfa_offset (12); \
|
|
|
|
cfi_rel_offset (r4, 0); \
|
|
|
|
cfi_rel_offset (r5, 4); \
|
|
|
|
cfi_rel_offset (r7, 8); \
|
|
|
|
.save { r4, r5, r7 }; \
|
|
|
|
ldmia ip, {r4, r5}
|
2012-04-21 15:38:55 +00:00
|
|
|
#undef DOARGS_7
|
2013-02-28 07:04:17 +00:00
|
|
|
#define DOARGS_7 \
|
|
|
|
.fnstart; \
|
|
|
|
mov ip, sp; \
|
2013-02-15 05:00:14 +00:00
|
|
|
push {r4, r5, r6, r7}; \
|
2013-02-28 07:04:17 +00:00
|
|
|
cfi_adjust_cfa_offset (16); \
|
|
|
|
cfi_rel_offset (r4, 0); \
|
|
|
|
cfi_rel_offset (r5, 4); \
|
|
|
|
cfi_rel_offset (r6, 8); \
|
|
|
|
cfi_rel_offset (r7, 12); \
|
|
|
|
.save { r4, r5, r6, r7 }; \
|
|
|
|
ldmia ip, {r4, r5, r6}
|
1998-04-01 09:11:44 +00:00
|
|
|
|
2012-04-21 15:38:55 +00:00
|
|
|
#undef UNDOARGS_0
|
2013-02-28 07:04:17 +00:00
|
|
|
#define UNDOARGS_0 \
|
2013-02-15 05:00:14 +00:00
|
|
|
pop {r7}; \
|
2013-02-28 07:04:17 +00:00
|
|
|
cfi_adjust_cfa_offset (-4); \
|
|
|
|
cfi_restore (r7); \
|
|
|
|
.fnend
|
2012-04-21 15:38:55 +00:00
|
|
|
#undef UNDOARGS_1
|
|
|
|
#define UNDOARGS_1 UNDOARGS_0
|
|
|
|
#undef UNDOARGS_2
|
|
|
|
#define UNDOARGS_2 UNDOARGS_0
|
|
|
|
#undef UNDOARGS_3
|
|
|
|
#define UNDOARGS_3 UNDOARGS_0
|
|
|
|
#undef UNDOARGS_4
|
|
|
|
#define UNDOARGS_4 UNDOARGS_0
|
|
|
|
#undef UNDOARGS_5
|
2013-02-28 07:04:17 +00:00
|
|
|
#define UNDOARGS_5 \
|
2013-02-15 05:00:14 +00:00
|
|
|
pop {r4, r7}; \
|
2013-02-28 07:04:17 +00:00
|
|
|
cfi_adjust_cfa_offset (-8); \
|
|
|
|
cfi_restore (r4); \
|
|
|
|
cfi_restore (r7); \
|
|
|
|
.fnend
|
2012-04-21 15:38:55 +00:00
|
|
|
#undef UNDOARGS_6
|
2013-02-28 07:04:17 +00:00
|
|
|
#define UNDOARGS_6 \
|
2013-02-15 05:00:14 +00:00
|
|
|
pop {r4, r5, r7}; \
|
2013-02-28 07:04:17 +00:00
|
|
|
cfi_adjust_cfa_offset (-12); \
|
|
|
|
cfi_restore (r4); \
|
|
|
|
cfi_restore (r5); \
|
|
|
|
cfi_restore (r7); \
|
|
|
|
.fnend
|
2012-04-21 15:38:55 +00:00
|
|
|
#undef UNDOARGS_7
|
2013-02-28 07:04:17 +00:00
|
|
|
#define UNDOARGS_7 \
|
2013-02-15 05:00:14 +00:00
|
|
|
pop {r4, r5, r6, r7}; \
|
2013-02-28 07:04:17 +00:00
|
|
|
cfi_adjust_cfa_offset (-16); \
|
|
|
|
cfi_restore (r4); \
|
|
|
|
cfi_restore (r5); \
|
|
|
|
cfi_restore (r6); \
|
|
|
|
cfi_restore (r7); \
|
|
|
|
.fnend
|
1997-05-21 01:44:03 +00:00
|
|
|
|
1998-12-22 17:25:07 +00:00
|
|
|
#else /* not __ASSEMBLER__ */
|
|
|
|
|
|
|
|
/* Define a macro which expands into the inline wrapper code for a system
|
|
|
|
call. */
|
|
|
|
#undef INLINE_SYSCALL
|
2003-01-08 00:15:07 +00:00
|
|
|
#define INLINE_SYSCALL(name, nr, args...) \
|
2003-02-20 20:22:20 +00:00
|
|
|
({ unsigned int _sys_result = INTERNAL_SYSCALL (name, , nr, args); \
|
|
|
|
if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (_sys_result, ), 0)) \
|
2003-01-08 00:15:07 +00:00
|
|
|
{ \
|
2003-02-20 20:22:20 +00:00
|
|
|
__set_errno (INTERNAL_SYSCALL_ERRNO (_sys_result, )); \
|
2003-01-08 00:15:07 +00:00
|
|
|
_sys_result = (unsigned int) -1; \
|
|
|
|
} \
|
|
|
|
(int) _sys_result; })
|
|
|
|
|
2003-01-09 04:09:26 +00:00
|
|
|
#undef INTERNAL_SYSCALL_DECL
|
|
|
|
#define INTERNAL_SYSCALL_DECL(err) do { } while (0)
|
|
|
|
|
2012-04-21 15:38:55 +00:00
|
|
|
#if defined(__thumb__)
|
|
|
|
/* We can not expose the use of r7 to the compiler. GCC (as
|
|
|
|
of 4.5) uses r7 as the hard frame pointer for Thumb - although
|
|
|
|
for Thumb-2 it isn't obviously a better choice than r11.
|
|
|
|
And GCC does not support asms that conflict with the frame
|
|
|
|
pointer.
|
|
|
|
|
|
|
|
This would be easier if syscall numbers never exceeded 255,
|
|
|
|
but they do. For the moment the LOAD_ARGS_7 is sacrificed.
|
|
|
|
We can't use push/pop inside the asm because that breaks
|
|
|
|
unwinding (i.e. thread cancellation) for this frame. We can't
|
|
|
|
locally save and restore r7, because we do not know if this
|
|
|
|
function uses r7 or if it is our caller's r7; if it is our caller's,
|
|
|
|
then unwinding will fail higher up the stack. So we move the
|
|
|
|
syscall out of line and provide its own unwind information. */
|
|
|
|
# undef INTERNAL_SYSCALL_RAW
|
|
|
|
# define INTERNAL_SYSCALL_RAW(name, err, nr, args...) \
|
|
|
|
({ \
|
|
|
|
register int _a1 asm ("a1"); \
|
|
|
|
int _nametmp = name; \
|
|
|
|
LOAD_ARGS_##nr (args) \
|
|
|
|
register int _name asm ("ip") = _nametmp; \
|
|
|
|
asm volatile ("bl __libc_do_syscall" \
|
|
|
|
: "=r" (_a1) \
|
|
|
|
: "r" (_name) ASM_ARGS_##nr \
|
|
|
|
: "memory", "lr"); \
|
|
|
|
_a1; })
|
|
|
|
#else /* ARM */
|
|
|
|
# undef INTERNAL_SYSCALL_RAW
|
|
|
|
# define INTERNAL_SYSCALL_RAW(name, err, nr, args...) \
|
|
|
|
({ \
|
|
|
|
register int _a1 asm ("r0"), _nr asm ("r7"); \
|
1998-12-22 17:25:07 +00:00
|
|
|
LOAD_ARGS_##nr (args) \
|
2012-04-21 15:38:55 +00:00
|
|
|
_nr = name; \
|
|
|
|
asm volatile ("swi 0x0 @ syscall " #name \
|
1998-12-22 17:25:07 +00:00
|
|
|
: "=r" (_a1) \
|
2012-04-21 15:38:55 +00:00
|
|
|
: "r" (_nr) ASM_ARGS_##nr \
|
2003-03-24 19:00:28 +00:00
|
|
|
: "memory"); \
|
2012-04-21 15:38:55 +00:00
|
|
|
_a1; })
|
|
|
|
#endif
|
1998-12-22 17:25:07 +00:00
|
|
|
|
* sysdeps/arm/dl-machine.h: Include <tls.h>.
(elf_machine_type_class, elf_machine_rel, elf_machine_rela): Handle
TLS relocations.
* sysdeps/unix/sysv/linux/arm/Makefile: Build __aeabi_read_tp.
* sysdeps/unix/sysv/linux/arm/sysdep.h (INTERNAL_SYSCALL_RAW): Renamed
from INTERNAL_SYSCALL.
(INTERNAL_SYSCALL, INTERNAL_SYSCALL_ARM): New macros.
* sysdeps/arm/dl-tls.h, sysdeps/arm/elf/configure.in,
sysdeps/arm/elf/configure, sysdeps/arm/libc-tls.c,
sysdeps/arm/linuxthreads/tls.h, sysdeps/arm/tls-macros.h,
sysdeps/unix/sysv/linux/arm/aeabi_read_tp.S,
sysdeps/unix/sysv/linux/arm/libc-aeabi_read_tp.S: New files.
2005-10-05 20:15:22 +00:00
|
|
|
#undef INTERNAL_SYSCALL
|
|
|
|
#define INTERNAL_SYSCALL(name, err, nr, args...) \
|
|
|
|
INTERNAL_SYSCALL_RAW(SYS_ify(name), err, nr, args)
|
|
|
|
|
|
|
|
#undef INTERNAL_SYSCALL_ARM
|
|
|
|
#define INTERNAL_SYSCALL_ARM(name, err, nr, args...) \
|
|
|
|
INTERNAL_SYSCALL_RAW(__ARM_NR_##name, err, nr, args)
|
|
|
|
|
2003-01-08 00:15:07 +00:00
|
|
|
#undef INTERNAL_SYSCALL_ERROR_P
|
2003-01-09 04:09:26 +00:00
|
|
|
#define INTERNAL_SYSCALL_ERROR_P(val, err) \
|
|
|
|
((unsigned int) (val) >= 0xfffff001u)
|
2003-01-08 00:15:07 +00:00
|
|
|
|
|
|
|
#undef INTERNAL_SYSCALL_ERRNO
|
2003-01-09 04:09:26 +00:00
|
|
|
#define INTERNAL_SYSCALL_ERRNO(val, err) (-(val))
|
2003-01-08 00:15:07 +00:00
|
|
|
|
2015-06-04 21:10:43 +00:00
|
|
|
/* List of system calls which are supported as vsyscalls. */
|
|
|
|
#define HAVE_CLOCK_GETTIME_VSYSCALL 1
|
|
|
|
#define HAVE_GETTIMEOFDAY_VSYSCALL 1
|
|
|
|
|
1998-12-22 17:25:07 +00:00
|
|
|
#define LOAD_ARGS_0()
|
|
|
|
#define ASM_ARGS_0
|
|
|
|
#define LOAD_ARGS_1(a1) \
|
2008-11-25 16:37:26 +00:00
|
|
|
int _a1tmp = (int) (a1); \
|
|
|
|
LOAD_ARGS_0 () \
|
|
|
|
_a1 = _a1tmp;
|
1998-12-22 17:25:07 +00:00
|
|
|
#define ASM_ARGS_1 ASM_ARGS_0, "r" (_a1)
|
|
|
|
#define LOAD_ARGS_2(a1, a2) \
|
2008-11-25 16:37:26 +00:00
|
|
|
int _a2tmp = (int) (a2); \
|
|
|
|
LOAD_ARGS_1 (a1) \
|
|
|
|
register int _a2 asm ("a2") = _a2tmp;
|
1998-12-22 17:25:07 +00:00
|
|
|
#define ASM_ARGS_2 ASM_ARGS_1, "r" (_a2)
|
|
|
|
#define LOAD_ARGS_3(a1, a2, a3) \
|
2008-11-25 16:37:26 +00:00
|
|
|
int _a3tmp = (int) (a3); \
|
|
|
|
LOAD_ARGS_2 (a1, a2) \
|
|
|
|
register int _a3 asm ("a3") = _a3tmp;
|
1998-12-22 17:25:07 +00:00
|
|
|
#define ASM_ARGS_3 ASM_ARGS_2, "r" (_a3)
|
|
|
|
#define LOAD_ARGS_4(a1, a2, a3, a4) \
|
2008-11-25 16:37:26 +00:00
|
|
|
int _a4tmp = (int) (a4); \
|
|
|
|
LOAD_ARGS_3 (a1, a2, a3) \
|
|
|
|
register int _a4 asm ("a4") = _a4tmp;
|
1998-12-22 17:25:07 +00:00
|
|
|
#define ASM_ARGS_4 ASM_ARGS_3, "r" (_a4)
|
|
|
|
#define LOAD_ARGS_5(a1, a2, a3, a4, a5) \
|
2008-11-25 16:37:26 +00:00
|
|
|
int _v1tmp = (int) (a5); \
|
|
|
|
LOAD_ARGS_4 (a1, a2, a3, a4) \
|
|
|
|
register int _v1 asm ("v1") = _v1tmp;
|
1998-12-22 17:25:07 +00:00
|
|
|
#define ASM_ARGS_5 ASM_ARGS_4, "r" (_v1)
|
1999-12-27 06:06:32 +00:00
|
|
|
#define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6) \
|
2008-11-25 16:37:26 +00:00
|
|
|
int _v2tmp = (int) (a6); \
|
|
|
|
LOAD_ARGS_5 (a1, a2, a3, a4, a5) \
|
|
|
|
register int _v2 asm ("v2") = _v2tmp;
|
1999-12-27 06:06:32 +00:00
|
|
|
#define ASM_ARGS_6 ASM_ARGS_5, "r" (_v2)
|
2012-04-21 15:38:55 +00:00
|
|
|
#ifndef __thumb__
|
|
|
|
# define LOAD_ARGS_7(a1, a2, a3, a4, a5, a6, a7) \
|
|
|
|
int _v3tmp = (int) (a7); \
|
|
|
|
LOAD_ARGS_6 (a1, a2, a3, a4, a5, a6) \
|
2008-11-25 16:37:26 +00:00
|
|
|
register int _v3 asm ("v3") = _v3tmp;
|
2012-04-21 15:38:55 +00:00
|
|
|
# define ASM_ARGS_7 ASM_ARGS_6, "r" (_v3)
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* For EABI, non-constant syscalls are actually pretty easy... */
|
|
|
|
#undef INTERNAL_SYSCALL_NCS
|
|
|
|
#define INTERNAL_SYSCALL_NCS(number, err, nr, args...) \
|
|
|
|
INTERNAL_SYSCALL_RAW (number, err, nr, args)
|
* sysdeps/arm/bits/setjmp.h, sysdeps/arm/fpu/bits/setjmp.h: Update
include guards.
* sysdeps/unix/arm/sysdep.S (syscall_error): Handle USE___THREAD and
RTLD_PRIVATE_ERRNO.
* sysdeps/unix/sysv/linux/arm/clone.S (__clone): Handle RESET_PID.
Handle new arguments.
* sysdeps/unix/sysv/linux/arm/vfork.S (__vfork): Use SAVE_PID and
RESTORE_PID. Use the right syscall error handler.
* sysdeps/unix/sysv/linux/arm/eabi/sigrestorer.S
(__default_sa_restorer, __default_rt_sa_restorer): Add unwind
information.
* sysdeps/unix/sysv/linux/arm/eabi/socket.S: Update formatting.
Add unwind information. Correct stack alignment typo.
* sysdeps/unix/sysv/linux/arm/eabi/sysdep.h
(INTERNAL_SYSCALL_NCS): Define.
* sysdeps/unix/sysv/linux/arm/sigaction.c
(__libc_sigaction): Remove never-valid handling for SA_ONSTACK.
* sysdeps/unix/sysv/linux/arm/socket.S: Whitespace cleanup.
* sysdeps/unix/sysv/linux/arm/sysdep.h (SYSCALL_ERROR_HANDLER): Handle
RTLD_PRIVATE_ERRNO.
(INTERNAL_SYSCALL_NCS): Implement.
* sysdeps/arm/nptl/Makefile, sysdeps/arm/nptl/jmpbuf-unwind.h,
sysdeps/arm/nptl/pthread_spin_lock.S,
sysdeps/arm/nptl/pthread_spin_trylock.S,
sysdeps/arm/nptl/pthreaddef.h, sysdeps/arm/nptl/tcb-offsets.sym,
sysdeps/arm/nptl/tls.h, sysdeps/unix/sysv/linux/arm/eabi/Makefile,
sysdeps/unix/sysv/linux/arm/eabi/nptl/Makefile,
sysdeps/unix/sysv/linux/arm/eabi/nptl/configure,
sysdeps/unix/sysv/linux/arm/eabi/nptl/configure.in,
sysdeps/unix/sysv/linux/arm/eabi/nptl/nptl-aeabi_unwind_cpp_pr1.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/rt-aeabi_unwind_cpp_pr1.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/sysdep-cancel.h,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-forcedunwind.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-resume.c,
sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind.h,
sysdeps/unix/sysv/linux/arm/nptl/Versions,
sysdeps/unix/sysv/linux/arm/nptl/bits/atomic.h,
sysdeps/unix/sysv/linux/arm/nptl/bits/pthreadtypes.h,
sysdeps/unix/sysv/linux/arm/nptl/clone.S,
sysdeps/unix/sysv/linux/arm/nptl/createthread.c,
sysdeps/unix/sysv/linux/arm/nptl/fork.c,
sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.c,
sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.h,
sysdeps/unix/sysv/linux/arm/nptl/pt-vfork.S,
sysdeps/unix/sysv/linux/arm/nptl/pthread_once.c,
sysdeps/unix/sysv/linux/arm/nptl/vfork.S: New files.
2005-11-16 19:03:42 +00:00
|
|
|
|
Linux: Consolidate {RTLD_}SINGLE_THREAD_P definition
Current GLIBC has two ways to implement the single thread optimization
on syscalls to avoid calling the cancellation path: either by using
global variables (__{libc,pthread}_multiple_thread) or by accessing
the TCB field (defined by TLS_MULTIPLE_THREADS_IN_TCB). Both the
variables and the macros to acces its value are defined in the
architecture sysdep-cancel.h header.
This patch consolidates its definition on only one header,
sysdeps/unix/sysv/linux/sysdep-cancel.h, and adds a new define
(SINGLE_THREAD_BY_GLOBAL) which the architecture defines if it prefer
to use the global variables instead of the TCB field. This is an
optimization, so if the architecture does not define it, the TCB
method will be used as default.
Checked on x86_64-linux-gnu and on a build with major touched
ABIs (aarch64-linux-gnu, alpha-linux-gnu, arm-linux-gnueabihf,
hppa-linux-gnu, i686-linux-gnu, m68k-linux-gnu, microblaze-linux-gnu,
mips-linux-gnu, mips64-linux-gnu, powerpc-linux-gnu,
powerpc64le-linux-gnu, s390-linux-gnu, s390x-linux-gnu, sh4-linux-gnu,
sparcv9-linux-gnu, sparc64-linux-gnu, tilegx-linux-gnu).
* sysdeps/unix/sysv/linux/aarch64/sysdep-cancel.h: Remove file.
* sysdeps/unix/sysv/linux/alpha/sysdep-cancel.h: Likewise.
* sysdeps/unix/sysv/linux/arm/sysdep-cancel.h: Likewise.
* sysdeps/unix/sysv/linux/hppa/sysdep-cancel.h: Likewise.
* sysdeps/unix/sysv/linux/mips/sysdep-cancel.h: Likewise.
* sysdeps/unix/sysv/linux/nios2/sysdep-cancel.h: Likewise.
* sysdeps/unix/sysv/linux/powerpc/sysdep-cancel.h: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/sysdep-cancel.h: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/sysdep-cancel.h: Likewise.
* sysdeps/unix/sysv/linux/sh/sysdep-cancel.h: Likewise.
* sysdeps/unix/sysv/linux/sparc/sysdep-cancel.h: Likewise.
* sysdeps/unix/sysv/linux/tile/sysdep-cancel.h: Likewise.
* sysdeps/unix/sysv/linux/x86_64/sysdep-cancel.h: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h
(SINGLE_THREAD_BY_GLOBAL): Define.
* sysdeps/unix/sysv/linux/aarch64/sysdep.h (SINGLE_THREAD_BY_GLOBAL):
Likewise.
* sysdeps/unix/sysv/linux/alpha/sysdep.h (SINGLE_THREAD_BY_GLOBAL):
Likewise.
* sysdeps/unix/sysv/linux/arm/sysdep.h (SINGLE_THREAD_BY_GLOBAL):
Likewise.
* sysdeps/unix/sysv/linux/hppa/sysdep.h (SINGLE_THREAD_BY_GLOBAL):
Likewise.
* sysdeps/unix/sysv/linux/microblaze/sysdep.h
(SINGLE_THREAD_BY_GLOBAL): Likewise.
* sysdeps/unix/sysv/linux/x86_64/sysdep.h (SINGLE_THREAD_BY_GLOBAL):
Likewise.
2017-08-03 22:27:27 +00:00
|
|
|
#define SINGLE_THREAD_BY_GLOBAL 1
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1998-05-29 10:20:59 +00:00
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#endif /* __ASSEMBLER__ */
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1997-05-21 01:44:03 +00:00
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#endif /* linux/arm/sysdep.h */
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