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Remove i386/epoll_pwait.S

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Only i386 implements epoll_pwait in assembly code withot cancellation
support.  All other architectures implement epoll_pwait in epoll_pwait.c
with

int epoll_pwait (int epfd, struct epoll_event *events,
		 int maxevents, int timeout,
		 const sigset_t *set)
{
  return SYSCALL_CANCEL (epoll_pwait, epfd, events, maxevents,
			 timeout, set, _NSIG / 8);
}

Although there is no test for epoll_pwait in glibc, since SYSCALL_CANCEL
works on i386 and epoll_pwait.c works for other architectures, it is
safe to assume that epoll_pwait.c with SYSCALL_CANCEL also works on
i386.

	[BZ #19137]
	* sysdeps/unix/sysv/linux/i386/Makefile (CFLAGS-epoll_pwait.c):
	Add -fomit-frame-pointer.
	* sysdeps/unix/sysv/linux/i386/epoll_pwait.S: Remove file.
This commit is contained in:
H.J. Lu 2015-10-15 06:26:38 -07:00
parent 98ad631cd0
commit b994fd7937
4 changed files with 9 additions and 79 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2015-10-15 H.J. Lu <hongjiu.lu@intel.com>
[BZ #19137]
* sysdeps/unix/sysv/linux/i386/Makefile (CFLAGS-epoll_pwait.c):
Add -fomit-frame-pointer.
* sysdeps/unix/sysv/linux/i386/epoll_pwait.S: Remove file.
2015-10-15 H.J. Lu <hongjiu.lu@intel.com>
* sysdeps/unix/sysv/linux/i386/libc-do-syscall.S

2
NEWS
View File

@ -20,7 +20,7 @@ Version 2.23
18961, 18966, 18967, 18969, 18970, 18977, 18980, 18981, 18985, 19003,
19007, 19012, 19016, 19018, 19032, 19046, 19049, 19050, 19059, 19071,
19074, 19076, 19077, 19078, 19079, 19085, 19086, 19088, 19094, 19095,
19124, 19125, 19129, 19134
19124, 19125, 19129, 19134, 19137
* The LD_POINTER_GUARD environment variable can no longer be used to
disable the pointer guard feature. It is always enabled.

1
sysdeps/unix/sysv/linux/i386/Makefile
View File

@ -4,6 +4,7 @@ default-abi := 32
ifeq ($(subdir),misc)
sysdep_routines += ioperm iopl vm86
# %ebp may be used to pass the 6th argument to syscall.
CFLAGS-epoll_pwait.c += -fomit-frame-pointer
CFLAGS-mmap.c += -fomit-frame-pointer
CFLAGS-mmap64.c += -fomit-frame-pointer
endif

78
sysdeps/unix/sysv/linux/i386/epoll_pwait.S
View File

@ -1,78 +0,0 @@
/* Copyright (C) 2007-2015 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.h>
#define _ERRNO_H
#include <bits/errno.h>
#define _SIGNAL_H
#include <bits/signum.h>
.text
ENTRY (epoll_pwait)
#ifdef __NR_epoll_pwait
/* Save registers. */
pushl %ebp
cfi_adjust_cfa_offset (4)
pushl %ebx
cfi_adjust_cfa_offset (4)
pushl %esi
cfi_adjust_cfa_offset (4)
pushl %edi
cfi_adjust_cfa_offset (4)
cfi_rel_offset (edi, 0)
cfi_rel_offset (esi, 4)
cfi_rel_offset (ebx, 8)
cfi_rel_offset (ebp, 12)
movl 20(%esp), %ebx
movl 24(%esp), %ecx
movl 28(%esp), %edx
movl 32(%esp), %esi
movl 36(%esp), %edi
movl $_NSIG/8, %ebp
movl $__NR_epoll_pwait, %eax
ENTER_KERNEL
/* Restore registers. */
popl %edi
cfi_adjust_cfa_offset (-4)
cfi_restore (edi)
popl %esi
cfi_adjust_cfa_offset (-4)
cfi_restore (esi)
popl %ebx
cfi_adjust_cfa_offset (-4)
cfi_restore (ebx)
popl %ebp
cfi_adjust_cfa_offset (-4)
cfi_restore (ebp)
/* If 0 > %eax > -4096 there was an error. */
cmpl $-4096, %eax
ja SYSCALL_ERROR_LABEL
/* Successful; return the syscall's value. */
#else
movl $-ENOSYS, %eax
jmp SYSCALL_ERROR_LABEL
#endif
ret
PSEUDO_END (epoll_pwait)